Datasets:

apehex
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evm_contracts

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Subset (2)

hex-ethereum · 1.42M rows

Split (2)

train · 1.29M rows

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chain_id uint64 1 1	block_number uint64 19.5M 20M	block_hash stringlengths 64 64	transaction_hash stringlengths 64 64	deployer_address stringlengths 40 40	factory_address stringlengths 40 40	contract_address stringlengths 40 40	creation_bytecode stringlengths 0 98.3k	runtime_bytecode stringlengths 0 49.2k	creation_sourcecode stringlengths 0 976k
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1	19,493,147	57e70e1a76fab763b2e680d1e2eee6d7fda4f073e5f01046f87fe14dffc68778	77f69625284911840d98232e89a634a27e05ac0965ecb81fef7de9a8e4d493a7	00bdb5699745f5b860228c8f939abf1b9ae374ed	ffa397285ce46fb78c588a9e993286aac68c37cd	f5ef187a163da2580e054b9b0f589f157d91c510	3d602d80600a3d3981f3363d3d373d3d3d363d73059ffafdc6ef594230de44f824e2bd0a51ca5ded5af43d82803e903d91602b57fd5bf3	363d3d373d3d3d363d73059ffafdc6ef594230de44f824e2bd0a51ca5ded5af43d82803e903d91602b57fd5bf3	pragma solidity 0.7.5; /* The MIT License (MIT) Copyright (c) 2018 Murray Software, LLC. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. / //solhint-disable max-line-length //solhint-disable no-inline-assembly contract CloneFactory { function createClone(address target, bytes32 salt) internal returns (address payable result) { bytes20 targetBytes = bytes20(target); assembly { // load the next free memory slot as a place to store the clone contract data let clone := mload(0x40) // The bytecode block below is responsible for contract initialization // during deployment, it is worth noting the proxied contract constructor will not be called during // the cloning procedure and that is why an initialization function needs to be called after the // clone is created mstore( clone, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000 ) // This stores the address location of the implementation contract // so that the proxy knows where to delegate call logic to mstore(add(clone, 0x14), targetBytes) // The bytecode block is the actual code that is deployed for each clone created. // It forwards all calls to the already deployed implementation via a delegatecall mstore( add(clone, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000 ) // deploy the contract using the CREATE2 opcode // this deploys the minimal proxy defined above, which will proxy all // calls to use the logic defined in the implementation contract `target` result := create2(0, clone, 0x37, salt) } } function isClone(address target, address query) internal view returns (bool result) { bytes20 targetBytes = bytes20(target); assembly { // load the next free memory slot as a place to store the comparison clone let clone := mload(0x40) // The next three lines store the expected bytecode for a miniml proxy // that targets `target` as its implementation contract mstore( clone, 0x363d3d373d3d3d363d7300000000000000000000000000000000000000000000 ) mstore(add(clone, 0xa), targetBytes) mstore( add(clone, 0x1e), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000 ) // the next two lines store the bytecode of the contract that we are checking in memory let other := add(clone, 0x40) extcodecopy(query, other, 0, 0x2d) // Check if the expected bytecode equals the actual bytecode and return the result result := and( eq(mload(clone), mload(other)), eq(mload(add(clone, 0xd)), mload(add(other, 0xd))) ) } } } /* * Contract that exposes the needed erc20 token functions / abstract contract ERC20Interface { // Send _value amount of tokens to address _to function transfer(address _to, uint256 _value) public virtual returns (bool success); // Get the account balance of another account with address _owner function balanceOf(address _owner) public virtual view returns (uint256 balance); } // helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false library TransferHelper { function safeApprove( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('approve(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::safeApprove: approve failed' ); } function safeTransfer( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transfer(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::safeTransfer: transfer failed' ); } function safeTransferFrom( address token, address from, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transferFrom(address,address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::transferFrom: transferFrom failed' ); } function safeTransferETH(address to, uint256 value) internal { (bool success, ) = to.call{value: value}(new bytes(0)); require(success, 'TransferHelper::safeTransferETH: ETH transfer failed'); } } /* * Contract that will forward any incoming Ether to the creator of the contract * / contract Forwarder { // Address to which any funds sent to this contract will be forwarded address public parentAddress; event ForwarderDeposited(address from, uint256 value, bytes data); /* * Initialize the contract, and sets the destination address to that of the creator / function init(address _parentAddress) external onlyUninitialized { parentAddress = _parentAddress; uint256 value = address(this).balance; if (value == 0) { return; } (bool success, ) = parentAddress.call{ value: value }(''); require(success, 'Flush failed'); // NOTE: since we are forwarding on initialization, // we don't have the context of the original sender. // We still emit an event about the forwarding but set // the sender to the forwarder itself emit ForwarderDeposited(address(this), value, msg.data); } /* * Modifier that will execute internal code block only if the sender is the parent address / modifier onlyParent { require(msg.sender == parentAddress, 'Only Parent'); _; } /* * Modifier that will execute internal code block only if the contract has not been initialized yet / modifier onlyUninitialized { require(parentAddress == address(0x0), 'Already initialized'); _; } /* * Default function; Gets called when data is sent but does not match any other function / fallback() external payable { flush(); } /* * Default function; Gets called when Ether is deposited with no data, and forwards it to the parent address / receive() external payable { flush(); } /* * Execute a token transfer of the full balance from the forwarder token to the parent address * @param tokenContractAddress the address of the erc20 token contract / function flushTokens(address tokenContractAddress) external onlyParent { ERC20Interface instance = ERC20Interface(tokenContractAddress); address forwarderAddress = address(this); uint256 forwarderBalance = instance.balanceOf(forwarderAddress); if (forwarderBalance == 0) { return; } TransferHelper.safeTransfer( tokenContractAddress, parentAddress, forwarderBalance ); } /* * Flush the entire balance of the contract to the parent address. */ function flush() public { uint256 value = address(this).balance; if (value == 0) { return; } (bool success, ) = parentAddress.call{ value: value }(''); require(success, 'Flush failed'); emit ForwarderDeposited(msg.sender, value, msg.data); } } contract ForwarderFactory is CloneFactory { address public implementationAddress; event ForwarderCreated(address newForwarderAddress, address parentAddress); constructor(address _implementationAddress) { implementationAddress = _implementationAddress; } function createForwarder(address parent, bytes32 salt) external { // include the signers in the salt so any contract deployed to a given address must have the same signers bytes32 finalSalt = keccak256(abi.encodePacked(parent, salt)); address payable clone = createClone(implementationAddress, finalSalt); Forwarder(clone).init(parent); emit ForwarderCreated(clone, parent); } }
1	19,493,147	57e70e1a76fab763b2e680d1e2eee6d7fda4f073e5f01046f87fe14dffc68778	055b6dd359aa5386de6e4e2b3aa45c7981c627d2f24e7026c27fa1e5b7ae32e9	00bdb5699745f5b860228c8f939abf1b9ae374ed	ffa397285ce46fb78c588a9e993286aac68c37cd	0d8eacefde8214d5e45a475b31a61e58a6516398	3d602d80600a3d3981f3363d3d373d3d3d363d73059ffafdc6ef594230de44f824e2bd0a51ca5ded5af43d82803e903d91602b57fd5bf3	363d3d373d3d3d363d73059ffafdc6ef594230de44f824e2bd0a51ca5ded5af43d82803e903d91602b57fd5bf3	pragma solidity 0.7.5; /* The MIT License (MIT) Copyright (c) 2018 Murray Software, LLC. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. / //solhint-disable max-line-length //solhint-disable no-inline-assembly contract CloneFactory { function createClone(address target, bytes32 salt) internal returns (address payable result) { bytes20 targetBytes = bytes20(target); assembly { // load the next free memory slot as a place to store the clone contract data let clone := mload(0x40) // The bytecode block below is responsible for contract initialization // during deployment, it is worth noting the proxied contract constructor will not be called during // the cloning procedure and that is why an initialization function needs to be called after the // clone is created mstore( clone, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000 ) // This stores the address location of the implementation contract // so that the proxy knows where to delegate call logic to mstore(add(clone, 0x14), targetBytes) // The bytecode block is the actual code that is deployed for each clone created. // It forwards all calls to the already deployed implementation via a delegatecall mstore( add(clone, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000 ) // deploy the contract using the CREATE2 opcode // this deploys the minimal proxy defined above, which will proxy all // calls to use the logic defined in the implementation contract `target` result := create2(0, clone, 0x37, salt) } } function isClone(address target, address query) internal view returns (bool result) { bytes20 targetBytes = bytes20(target); assembly { // load the next free memory slot as a place to store the comparison clone let clone := mload(0x40) // The next three lines store the expected bytecode for a miniml proxy // that targets `target` as its implementation contract mstore( clone, 0x363d3d373d3d3d363d7300000000000000000000000000000000000000000000 ) mstore(add(clone, 0xa), targetBytes) mstore( add(clone, 0x1e), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000 ) // the next two lines store the bytecode of the contract that we are checking in memory let other := add(clone, 0x40) extcodecopy(query, other, 0, 0x2d) // Check if the expected bytecode equals the actual bytecode and return the result result := and( eq(mload(clone), mload(other)), eq(mload(add(clone, 0xd)), mload(add(other, 0xd))) ) } } } /* * Contract that exposes the needed erc20 token functions / abstract contract ERC20Interface { // Send _value amount of tokens to address _to function transfer(address _to, uint256 _value) public virtual returns (bool success); // Get the account balance of another account with address _owner function balanceOf(address _owner) public virtual view returns (uint256 balance); } // helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false library TransferHelper { function safeApprove( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('approve(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::safeApprove: approve failed' ); } function safeTransfer( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transfer(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::safeTransfer: transfer failed' ); } function safeTransferFrom( address token, address from, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transferFrom(address,address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::transferFrom: transferFrom failed' ); } function safeTransferETH(address to, uint256 value) internal { (bool success, ) = to.call{value: value}(new bytes(0)); require(success, 'TransferHelper::safeTransferETH: ETH transfer failed'); } } /* * Contract that will forward any incoming Ether to the creator of the contract * / contract Forwarder { // Address to which any funds sent to this contract will be forwarded address public parentAddress; event ForwarderDeposited(address from, uint256 value, bytes data); /* * Initialize the contract, and sets the destination address to that of the creator / function init(address _parentAddress) external onlyUninitialized { parentAddress = _parentAddress; uint256 value = address(this).balance; if (value == 0) { return; } (bool success, ) = parentAddress.call{ value: value }(''); require(success, 'Flush failed'); // NOTE: since we are forwarding on initialization, // we don't have the context of the original sender. // We still emit an event about the forwarding but set // the sender to the forwarder itself emit ForwarderDeposited(address(this), value, msg.data); } /* * Modifier that will execute internal code block only if the sender is the parent address / modifier onlyParent { require(msg.sender == parentAddress, 'Only Parent'); _; } /* * Modifier that will execute internal code block only if the contract has not been initialized yet / modifier onlyUninitialized { require(parentAddress == address(0x0), 'Already initialized'); _; } /* * Default function; Gets called when data is sent but does not match any other function / fallback() external payable { flush(); } /* * Default function; Gets called when Ether is deposited with no data, and forwards it to the parent address / receive() external payable { flush(); } /* * Execute a token transfer of the full balance from the forwarder token to the parent address * @param tokenContractAddress the address of the erc20 token contract / function flushTokens(address tokenContractAddress) external onlyParent { ERC20Interface instance = ERC20Interface(tokenContractAddress); address forwarderAddress = address(this); uint256 forwarderBalance = instance.balanceOf(forwarderAddress); if (forwarderBalance == 0) { return; } TransferHelper.safeTransfer( tokenContractAddress, parentAddress, forwarderBalance ); } /* * Flush the entire balance of the contract to the parent address. */ function flush() public { uint256 value = address(this).balance; if (value == 0) { return; } (bool success, ) = parentAddress.call{ value: value }(''); require(success, 'Flush failed'); emit ForwarderDeposited(msg.sender, value, msg.data); } } contract ForwarderFactory is CloneFactory { address public implementationAddress; event ForwarderCreated(address newForwarderAddress, address parentAddress); constructor(address _implementationAddress) { implementationAddress = _implementationAddress; } function createForwarder(address parent, bytes32 salt) external { // include the signers in the salt so any contract deployed to a given address must have the same signers bytes32 finalSalt = keccak256(abi.encodePacked(parent, salt)); address payable clone = createClone(implementationAddress, finalSalt); Forwarder(clone).init(parent); emit ForwarderCreated(clone, parent); } }
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"language": "Solidity", "sources": { "contracts/uniswapv2/UniswapV2Pair.sol": { "content": "// SPDX-License-Identifier: MIT\n\npragma solidity =0.6.12;\n\nimport './UniswapV2ERC20.sol';\nimport './libraries/Math.sol';\nimport './libraries/UQ112x112.sol';\nimport './interfaces/IERC20.sol';\nimport './interfaces/IUniswapV2Factory.sol';\nimport './interfaces/IUniswapV2Callee.sol';\n\n\ninterface IMigrator {\n // Return the desired amount of liquidity token that the migrator wants.\n function desiredLiquidity() external view returns (uint256);\n}\n\ncontract UniswapV2Pair is UniswapV2ERC20 {\n using SafeMathUniswap for uint;\n using UQ112x112 for uint224;\n\n uint public constant MINIMUM_LIQUIDITY = 10*3;\n bytes4 private constant SELECTOR = bytes4(keccak256(bytes('transfer(address,uint256)')));\n\n address public factory;\n address public token0;\n address public token1;\n\n uint112 private reserve0; // uses single storage slot, accessible via getReserves\n uint112 private reserve1; // uses single storage slot, accessible via getReserves\n uint32 private blockTimestampLast; // uses single storage slot, accessible via getReserves\n\n uint public price0CumulativeLast;\n uint public price1CumulativeLast;\n uint public kLast; // reserve0 reserve1, as of immediately after the most recent liquidity event\n\n uint public totalFee; // total fee (parts per thousand) charged for a swap\n uint public alpha; // numerator for the protocol fee factor\n uint public beta; // denominator for the protocol fee factor\n\n uint private unlocked = 1;\n modifier lock() {\n require(unlocked == 1, 'UniswapV2: LOCKED');\n unlocked = 0;\n _;\n unlocked = 1;\n }\n\n function getReserves() public view returns (uint112 _reserve0, uint112 _reserve1, uint32 _blockTimestampLast) {\n _reserve0 = reserve0;\n _reserve1 = reserve1;\n _blockTimestampLast = blockTimestampLast;\n }\n\n function _safeTransfer(address token, address to, uint value) private {\n (bool success, bytes memory data) = token.call(abi.encodeWithSelector(SELECTOR, to, value));\n require(success && (data.length == 0 \|\| abi.decode(data, (bool))), 'UniswapV2: TRANSFER_FAILED');\n }\n\n event Mint(address indexed sender, uint amount0, uint amount1);\n event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);\n event Swap(\n address indexed sender,\n uint amount0In,\n uint amount1In,\n uint amount0Out,\n uint amount1Out,\n address indexed to\n );\n event Sync(uint112 reserve0, uint112 reserve1);\n event FeeUpdated(uint totalFee, uint alpha, uint beta);\n\n constructor() public {\n factory = msg.sender;\n }\n\n // called once by the factory at time of deployment\n function initialize(address _token0, address _token1, uint _totalFee, uint _alpha, uint _beta) external {\n require(msg.sender == factory, 'UniswapV2: FORBIDDEN'); // sufficient check\n require(_alpha > 0,\"_alpha must be greater than 0\");\n require(_beta > _alpha,\"beta should always be later than alpha\");\n require(_totalFee > 0,\"totalFee should not be 0, which will allow free flash swap\");\n token0 = _token0;\n token1 = _token1;\n totalFee = _totalFee;\n alpha = _alpha;\n beta = _beta;\n }\n\n function updateFee(uint _totalFee, uint _alpha, uint _beta) external {\n require(msg.sender == factory, 'UniswapV2: FORBIDDEN');\n totalFee = _totalFee;\n alpha = _alpha;\n beta = _beta;\n\n emit FeeUpdated(_totalFee, _alpha, _beta);\n }\n\n // update reserves and, on the first call per block, price accumulators\n function _update(uint balance0, uint balance1, uint112 _reserve0, uint112 _reserve1) private {\n require(balance0 <= uint112(-1) && balance1 <= uint112(-1), 'UniswapV2: OVERFLOW');\n uint32 blockTimestamp = uint32(block.timestamp % 2*32);\n uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired\n if (timeElapsed > 0 && _reserve0 != 0 && _reserve1 != 0) {\n // never overflows, and + overflow is desired\n price0CumulativeLast += uint(UQ112x112.encode(_reserve1).uqdiv(_reserve0)) * timeElapsed;\n price1CumulativeLast += uint(UQ112x112.encode(_reserve0).uqdiv(_reserve1)) * timeElapsed;\n }\n reserve0 = uint112(balance0);\n reserve1 = uint112(balance1);\n blockTimestampLast = blockTimestamp;\n emit Sync(reserve0, reserve1);\n }\n\n // if fee is on, mint liquidity equivalent to alpha/beta of the growth in sqrt(k)\n function _mintFee(uint112 _reserve0, uint112 _reserve1) private returns (bool feeOn) {\n address feeTo = IUniswapV2Factory(factory).feeTo();\n feeOn = feeTo != address(0);\n uint _kLast = kLast; // gas savings\n if (feeOn) {\n if (_kLast != 0) {\n uint rootK = Math.sqrt(uint(_reserve0).mul(_reserve1));\n uint rootKLast = Math.sqrt(_kLast);\n if (rootK > rootKLast) {\n uint numerator = totalSupply.mul(rootK.sub(rootKLast)).mul(alpha);\n uint denominator = rootK.mul(beta.sub(alpha)).add(rootKLast.mul(alpha));\n uint liquidity = numerator / denominator;\n if (liquidity > 0) _mint(feeTo, liquidity);\n }\n }\n } else if (_kLast != 0) {\n kLast = 0;\n }\n }\n\n // this low-level function should be called from a contract which performs important safety checks\n function mint(address to) external lock returns (uint liquidity) {\n (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings\n uint balance0 = IERC20Uniswap(token0).balanceOf(address(this));\n uint balance1 = IERC20Uniswap(token1).balanceOf(address(this));\n uint amount0 = balance0.sub(_reserve0);\n uint amount1 = balance1.sub(_reserve1);\n\n bool feeOn = _mintFee(_reserve0, _reserve1);\n uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee\n if (_totalSupply == 0) {\n address migrator = IUniswapV2Factory(factory).migrator();\n if (msg.sender == migrator) {\n liquidity = IMigrator(migrator).desiredLiquidity();\n require(liquidity > 0 && liquidity != uint256(-1), \"Bad desired liquidity\");\n } else {\n require(migrator == address(0), \"Must not have migrator\");\n liquidity = Math.sqrt(amount0.mul(amount1)).sub(MINIMUM_LIQUIDITY);\n _mint(address(0), MINIMUM_LIQUIDITY); // permanently lock the first MINIMUM_LIQUIDITY tokens\n }\n } else {\n liquidity = Math.min(amount0.mul(_totalSupply) / _reserve0, amount1.mul(_totalSupply) / _reserve1);\n }\n require(liquidity > 0, 'UniswapV2: INSUFFICIENT_LIQUIDITY_MINTED');\n _mint(to, liquidity);\n\n _update(balance0, balance1, _reserve0, _reserve1);\n if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date\n emit Mint(msg.sender, amount0, amount1);\n }\n\n // this low-level function should be called from a contract which performs important safety checks\n function burn(address to) external lock returns (uint amount0, uint amount1) {\n (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings\n address _token0 = token0; // gas savings\n address _token1 = token1; // gas savings\n uint balance0 = IERC20Uniswap(_token0).balanceOf(address(this));\n uint balance1 = IERC20Uniswap(_token1).balanceOf(address(this));\n uint liquidity = balanceOf[address(this)];\n\n bool feeOn = _mintFee(_reserve0, _reserve1);\n uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee\n amount0 = liquidity.mul(balance0) / _totalSupply; // using balances ensures pro-rata distribution\n amount1 = liquidity.mul(balance1) / _totalSupply; // using balances ensures pro-rata distribution\n require(amount0 > 0 && amount1 > 0, 'UniswapV2: INSUFFICIENT_LIQUIDITY_BURNED');\n _burn(address(this), liquidity);\n _safeTransfer(_token0, to, amount0);\n _safeTransfer(_token1, to, amount1);\n balance0 = IERC20Uniswap(_token0).balanceOf(address(this));\n balance1 = IERC20Uniswap(_token1).balanceOf(address(this));\n\n _update(balance0, balance1, _reserve0, _reserve1);\n if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date\n emit Burn(msg.sender, amount0, amount1, to);\n }\n\n // this low-level function should be called from a contract which performs important safety checks\n function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external lock {\n require(amount0Out > 0 \|\| amount1Out > 0, 'UniswapV2: INSUFFICIENT_OUTPUT_AMOUNT');\n (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings\n require(amount0Out < _reserve0 && amount1Out < _reserve1, 'UniswapV2: INSUFFICIENT_LIQUIDITY');\n\n uint balance0;\n uint balance1;\n { // scope for _token{0,1}, avoids stack too deep errors\n address _token0 = token0;\n address _token1 = token1;\n require(to != _token0 && to != _token1, 'UniswapV2: INVALID_TO');\n if (amount0Out > 0) _safeTransfer(_token0, to, amount0Out); // optimistically transfer tokens\n if (amount1Out > 0) _safeTransfer(_token1, to, amount1Out); // optimistically transfer tokens\n if (data.length > 0) IUniswapV2Callee(to).uniswapV2Call(msg.sender, amount0Out, amount1Out, data);\n balance0 = IERC20Uniswap(_token0).balanceOf(address(this));\n balance1 = IERC20Uniswap(_token1).balanceOf(address(this));\n }\n uint amount0In = balance0 > _reserve0 - amount0Out ? balance0 - (_reserve0 - amount0Out) : 0;\n uint amount1In = balance1 > _reserve1 - amount1Out ? balance1 - (_reserve1 - amount1Out) : 0;\n require(amount0In > 0 \|\| amount1In > 0, 'UniswapV2: INSUFFICIENT_INPUT_AMOUNT');\n { // scope for reserve{0,1}Adjusted, avoids stack too deep errors\n uint balance0Adjusted = balance0.mul(1000).sub(amount0In.mul(totalFee));\n uint balance1Adjusted = balance1.mul(1000).sub(amount1In.mul(totalFee));\n require(balance0Adjusted.mul(balance1Adjusted) >= uint(_reserve0).mul(_reserve1).mul(10002), 'UniswapV2: K');\n }\n\n _update(balance0, balance1, _reserve0, _reserve1);\n emit Swap(msg.sender, amount0In, amount1In, amount0Out, amount1Out, to);\n }\n\n // force balances to match reserves\n function skim(address to) external lock {\n address _token0 = token0; // gas savings\n address _token1 = token1; // gas savings\n _safeTransfer(_token0, to, IERC20Uniswap(_token0).balanceOf(address(this)).sub(reserve0));\n _safeTransfer(_token1, to, IERC20Uniswap(_token1).balanceOf(address(this)).sub(reserve1));\n }\n\n // force reserves to match balances\n function sync() external lock {\n _update(IERC20Uniswap(token0).balanceOf(address(this)), IERC20Uniswap(token1).balanceOf(address(this)), reserve0, reserve1);\n }\n}\n" }, "contracts/uniswapv2/UniswapV2ERC20.sol": { "content": "// SPDX-License-Identifier: MIT\n\npragma solidity =0.6.12;\n\nimport './libraries/SafeMath.sol';\n\ncontract UniswapV2ERC20 {\n using SafeMathUniswap for uint;\n\n string public constant name = 'ShibaSwap LP Token';\n string public constant symbol = 'SSLP';\n uint8 public constant decimals = 18;\n uint public totalSupply;\n mapping(address => uint) public balanceOf;\n mapping(address => mapping(address => uint)) public allowance;\n\n bytes32 public DOMAIN_SEPARATOR;\n // keccak256(\"Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)\");\n bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;\n mapping(address => uint) public nonces;\n\n event Approval(address indexed owner, address indexed spender, uint value);\n event Transfer(address indexed from, address indexed to, uint value);\n\n constructor() public {\n uint chainId;\n assembly {\n chainId := chainid()\n }\n DOMAIN_SEPARATOR = keccak256(\n abi.encode(\n keccak256('EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)'),\n keccak256(bytes(name)),\n keccak256(bytes('1')),\n chainId,\n address(this)\n )\n );\n }\n\n function _mint(address to, uint value) internal {\n totalSupply = totalSupply.add(value);\n balanceOf[to] = balanceOf[to].add(value);\n emit Transfer(address(0), to, value);\n }\n\n function _burn(address from, uint value) internal {\n balanceOf[from] = balanceOf[from].sub(value);\n totalSupply = totalSupply.sub(value);\n emit Transfer(from, address(0), value);\n }\n\n function _approve(address owner, address spender, uint value) private {\n allowance[owner][spender] = value;\n emit Approval(owner, spender, value);\n }\n\n function _transfer(address from, address to, uint value) private {\n balanceOf[from] = balanceOf[from].sub(value);\n balanceOf[to] = balanceOf[to].add(value);\n emit Transfer(from, to, value);\n }\n\n function approve(address spender, uint value) external returns (bool) {\n _approve(msg.sender, spender, value);\n return true;\n }\n\n function transfer(address to, uint value) external returns (bool) {\n _transfer(msg.sender, to, value);\n return true;\n }\n\n function transferFrom(address from, address to, uint value) external returns (bool) {\n if (allowance[from][msg.sender] != uint(-1)) {\n allowance[from][msg.sender] = allowance[from][msg.sender].sub(value);\n }\n _transfer(from, to, value);\n return true;\n }\n\n function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external {\n require(deadline >= block.timestamp, 'UniswapV2: EXPIRED');\n bytes32 digest = keccak256(\n abi.encodePacked(\n '\\x19\\x01',\n DOMAIN_SEPARATOR,\n keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline))\n )\n );\n address recoveredAddress = ecrecover(digest, v, r, s);\n require(recoveredAddress != address(0) && recoveredAddress == owner, 'UniswapV2: INVALID_SIGNATURE');\n _approve(owner, spender, value);\n }\n}\n" }, "contracts/uniswapv2/libraries/Math.sol": { "content": "// SPDX-License-Identifier: MIT\n\npragma solidity =0.6.12;\n\n// a library for performing various math operations\n\nlibrary Math {\n function min(uint x, uint y) internal pure returns (uint z) {\n z = x < y ? x : y;\n }\n\n // babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method)\n function sqrt(uint y) internal pure returns (uint z) {\n if (y > 3) {\n z = y;\n uint x = y / 2 + 1;\n while (x < z) {\n z = x;\n x = (y / x + x) / 2;\n }\n } else if (y != 0) {\n z = 1;\n }\n }\n}\n" }, "contracts/uniswapv2/libraries/UQ112x112.sol": { "content": "// SPDX-License-Identifier: MIT\n\npragma solidity =0.6.12;\n\n// a library for handling binary fixed point numbers (https://en.wikipedia.org/wiki/Q_(number_format))\n\n// range: [0, 2112 - 1]\n// resolution: 1 / 2112\n\nlibrary UQ112x112 {\n uint224 constant Q112 = 2112;\n\n // encode a uint112 as a UQ112x112\n function encode(uint112 y) internal pure returns (uint224 z) {\n z = uint224(y) * Q112; // never overflows\n }\n\n // divide a UQ112x112 by a uint112, returning a UQ112x112\n function uqdiv(uint224 x, uint112 y) internal pure returns (uint224 z) {\n z = x / uint224(y);\n }\n}\n" }, "contracts/uniswapv2/interfaces/IERC20.sol": { "content": "// SPDX-License-Identifier: MIT\n\npragma solidity >=0.5.0;\n\ninterface IERC20Uniswap {\n event Approval(address indexed owner, address indexed spender, uint value);\n event Transfer(address indexed from, address indexed to, uint value);\n\n function name() external view returns (string memory);\n function symbol() external view returns (string memory);\n function decimals() external view returns (uint8);\n function totalSupply() external view returns (uint);\n function balanceOf(address owner) external view returns (uint);\n function allowance(address owner, address spender) external view returns (uint);\n\n function approve(address spender, uint value) external returns (bool);\n function transfer(address to, uint value) external returns (bool);\n function transferFrom(address from, address to, uint value) external returns (bool);\n}\n" }, "contracts/uniswapv2/interfaces/IUniswapV2Factory.sol": { "content": "// SPDX-License-Identifier: MIT\n\npragma solidity >=0.5.0;\n\ninterface IUniswapV2Factory {\n event PairCreated(address indexed token0, address indexed token1, address pair, uint);\n\n function feeTo() external view returns (address);\n function feeToSetter() external view returns (address);\n function migrator() external view returns (address);\n\n function totalFeeTopCoin() external view returns (uint);\n function alphaTopCoin() external view returns (uint);\n function betaTopCoin() external view returns (uint);\n function totalFeeRegular() external view returns (uint);\n function alphaRegular() external view returns (uint);\n function betaRegular() external view returns (uint);\n\n function topCoins(address token) external view returns (bool isTopCoin);\n function getPair(address tokenA, address tokenB) external view returns (address pair);\n function allPairs(uint) external view returns (address pair);\n function allPairsLength() external view returns (uint);\n\n function createPair(address tokenA, address tokenB) external returns (address pair);\n\n function setFeeTo(address) external;\n function setFeeToSetter(address) external;\n function setMigrator(address) external;\n}\n" }, "contracts/uniswapv2/interfaces/IUniswapV2Callee.sol": { "content": "// SPDX-License-Identifier: MIT\n\npragma solidity >=0.5.0;\n\ninterface IUniswapV2Callee {\n function uniswapV2Call(address sender, uint amount0, uint amount1, bytes calldata data) external;\n}\n" }, "contracts/uniswapv2/libraries/SafeMath.sol": { "content": "// SPDX-License-Identifier: MIT\n\npragma solidity =0.6.12;\n\n// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)\n\nlibrary SafeMathUniswap {\n function add(uint x, uint y) internal pure returns (uint z) {\n require((z = x + y) >= x, 'ds-math-add-overflow');\n }\n\n function sub(uint x, uint y) internal pure returns (uint z) {\n require((z = x - y) <= x, 'ds-math-sub-underflow');\n }\n\n function mul(uint x, uint y) internal pure returns (uint z) {\n require(y == 0 \|\| (z = x * y) / y == x, 'ds-math-mul-overflow');\n }\n}\n" } }, "settings": { "optimizer": { "enabled": true, "runs": 5000 }, "outputSelection": { "": { "": [ "evm.bytecode", "evm.deployedBytecode", "abi" ] } }, "metadata": { "useLiteralContent": true }, "libraries": {} } }}
1	19,493,149	85e81a1aef2c2cf21deae861f89854881653bfa0c44a871dd83dc53a9ce82995	7ba0c10d1dc9643638fe95193d8fa2395229dcfddc03358c536a782c6d0e4e25	4e565f63257d90f988e5ec9d065bab00f94d2dfd	9fa5c5733b53814692de4fb31fd592070de5f5f0	c40c365580d352161460cd20c74fdcc6fab89119	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
1	19,493,150	b234974265da8a898383156b2e8f77985ce36530b9d743cb2fd9cd2bdf993b10	2567d0d13f3118604d74f20e21d80bcd4a8d60270b29d0cfd95876e7760ae269	d2c82f2e5fa236e114a81173e375a73664610998	ffa397285ce46fb78c588a9e993286aac68c37cd	c7ea67490aea2390af41f36a99426e70d5fa87b4	3d602d80600a3d3981f3363d3d373d3d3d363d73059ffafdc6ef594230de44f824e2bd0a51ca5ded5af43d82803e903d91602b57fd5bf3	363d3d373d3d3d363d73059ffafdc6ef594230de44f824e2bd0a51ca5ded5af43d82803e903d91602b57fd5bf3	pragma solidity 0.7.5; /* The MIT License (MIT) Copyright (c) 2018 Murray Software, LLC. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. / //solhint-disable max-line-length //solhint-disable no-inline-assembly contract CloneFactory { function createClone(address target, bytes32 salt) internal returns (address payable result) { bytes20 targetBytes = bytes20(target); assembly { // load the next free memory slot as a place to store the clone contract data let clone := mload(0x40) // The bytecode block below is responsible for contract initialization // during deployment, it is worth noting the proxied contract constructor will not be called during // the cloning procedure and that is why an initialization function needs to be called after the // clone is created mstore( clone, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000 ) // This stores the address location of the implementation contract // so that the proxy knows where to delegate call logic to mstore(add(clone, 0x14), targetBytes) // The bytecode block is the actual code that is deployed for each clone created. // It forwards all calls to the already deployed implementation via a delegatecall mstore( add(clone, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000 ) // deploy the contract using the CREATE2 opcode // this deploys the minimal proxy defined above, which will proxy all // calls to use the logic defined in the implementation contract `target` result := create2(0, clone, 0x37, salt) } } function isClone(address target, address query) internal view returns (bool result) { bytes20 targetBytes = bytes20(target); assembly { // load the next free memory slot as a place to store the comparison clone let clone := mload(0x40) // The next three lines store the expected bytecode for a miniml proxy // that targets `target` as its implementation contract mstore( clone, 0x363d3d373d3d3d363d7300000000000000000000000000000000000000000000 ) mstore(add(clone, 0xa), targetBytes) mstore( add(clone, 0x1e), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000 ) // the next two lines store the bytecode of the contract that we are checking in memory let other := add(clone, 0x40) extcodecopy(query, other, 0, 0x2d) // Check if the expected bytecode equals the actual bytecode and return the result result := and( eq(mload(clone), mload(other)), eq(mload(add(clone, 0xd)), mload(add(other, 0xd))) ) } } } /* * Contract that exposes the needed erc20 token functions / abstract contract ERC20Interface { // Send _value amount of tokens to address _to function transfer(address _to, uint256 _value) public virtual returns (bool success); // Get the account balance of another account with address _owner function balanceOf(address _owner) public virtual view returns (uint256 balance); } // helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false library TransferHelper { function safeApprove( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('approve(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::safeApprove: approve failed' ); } function safeTransfer( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transfer(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::safeTransfer: transfer failed' ); } function safeTransferFrom( address token, address from, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transferFrom(address,address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::transferFrom: transferFrom failed' ); } function safeTransferETH(address to, uint256 value) internal { (bool success, ) = to.call{value: value}(new bytes(0)); require(success, 'TransferHelper::safeTransferETH: ETH transfer failed'); } } /* * Contract that will forward any incoming Ether to the creator of the contract * / contract Forwarder { // Address to which any funds sent to this contract will be forwarded address public parentAddress; event ForwarderDeposited(address from, uint256 value, bytes data); /* * Initialize the contract, and sets the destination address to that of the creator / function init(address _parentAddress) external onlyUninitialized { parentAddress = _parentAddress; uint256 value = address(this).balance; if (value == 0) { return; } (bool success, ) = parentAddress.call{ value: value }(''); require(success, 'Flush failed'); // NOTE: since we are forwarding on initialization, // we don't have the context of the original sender. // We still emit an event about the forwarding but set // the sender to the forwarder itself emit ForwarderDeposited(address(this), value, msg.data); } /* * Modifier that will execute internal code block only if the sender is the parent address / modifier onlyParent { require(msg.sender == parentAddress, 'Only Parent'); _; } /* * Modifier that will execute internal code block only if the contract has not been initialized yet / modifier onlyUninitialized { require(parentAddress == address(0x0), 'Already initialized'); _; } /* * Default function; Gets called when data is sent but does not match any other function / fallback() external payable { flush(); } /* * Default function; Gets called when Ether is deposited with no data, and forwards it to the parent address / receive() external payable { flush(); } /* * Execute a token transfer of the full balance from the forwarder token to the parent address * @param tokenContractAddress the address of the erc20 token contract / function flushTokens(address tokenContractAddress) external onlyParent { ERC20Interface instance = ERC20Interface(tokenContractAddress); address forwarderAddress = address(this); uint256 forwarderBalance = instance.balanceOf(forwarderAddress); if (forwarderBalance == 0) { return; } TransferHelper.safeTransfer( tokenContractAddress, parentAddress, forwarderBalance ); } /* * Flush the entire balance of the contract to the parent address. */ function flush() public { uint256 value = address(this).balance; if (value == 0) { return; } (bool success, ) = parentAddress.call{ value: value }(''); require(success, 'Flush failed'); emit ForwarderDeposited(msg.sender, value, msg.data); } } contract ForwarderFactory is CloneFactory { address public implementationAddress; event ForwarderCreated(address newForwarderAddress, address parentAddress); constructor(address _implementationAddress) { implementationAddress = _implementationAddress; } function createForwarder(address parent, bytes32 salt) external { // include the signers in the salt so any contract deployed to a given address must have the same signers bytes32 finalSalt = keccak256(abi.encodePacked(parent, salt)); address payable clone = createClone(implementationAddress, finalSalt); Forwarder(clone).init(parent); emit ForwarderCreated(clone, parent); } }
1	19,493,155	b7f06064d97c5130fad20eb8847032a7439daf88e6559930154e35c50dcabba6	8dbd58353ea3eb332526f5b741ea9699bb4584264a7988d619c12f813db9f334	d2c82f2e5fa236e114a81173e375a73664610998	ffa397285ce46fb78c588a9e993286aac68c37cd	3d4a8b19ccc7e86b0d18b6165690db30ff5abc8e	3d602d80600a3d3981f3363d3d373d3d3d363d73059ffafdc6ef594230de44f824e2bd0a51ca5ded5af43d82803e903d91602b57fd5bf3	363d3d373d3d3d363d73059ffafdc6ef594230de44f824e2bd0a51ca5ded5af43d82803e903d91602b57fd5bf3	pragma solidity 0.7.5; /* The MIT License (MIT) Copyright (c) 2018 Murray Software, LLC. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. / //solhint-disable max-line-length //solhint-disable no-inline-assembly contract CloneFactory { function createClone(address target, bytes32 salt) internal returns (address payable result) { bytes20 targetBytes = bytes20(target); assembly { // load the next free memory slot as a place to store the clone contract data let clone := mload(0x40) // The bytecode block below is responsible for contract initialization // during deployment, it is worth noting the proxied contract constructor will not be called during // the cloning procedure and that is why an initialization function needs to be called after the // clone is created mstore( clone, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000 ) // This stores the address location of the implementation contract // so that the proxy knows where to delegate call logic to mstore(add(clone, 0x14), targetBytes) // The bytecode block is the actual code that is deployed for each clone created. // It forwards all calls to the already deployed implementation via a delegatecall mstore( add(clone, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000 ) // deploy the contract using the CREATE2 opcode // this deploys the minimal proxy defined above, which will proxy all // calls to use the logic defined in the implementation contract `target` result := create2(0, clone, 0x37, salt) } } function isClone(address target, address query) internal view returns (bool result) { bytes20 targetBytes = bytes20(target); assembly { // load the next free memory slot as a place to store the comparison clone let clone := mload(0x40) // The next three lines store the expected bytecode for a miniml proxy // that targets `target` as its implementation contract mstore( clone, 0x363d3d373d3d3d363d7300000000000000000000000000000000000000000000 ) mstore(add(clone, 0xa), targetBytes) mstore( add(clone, 0x1e), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000 ) // the next two lines store the bytecode of the contract that we are checking in memory let other := add(clone, 0x40) extcodecopy(query, other, 0, 0x2d) // Check if the expected bytecode equals the actual bytecode and return the result result := and( eq(mload(clone), mload(other)), eq(mload(add(clone, 0xd)), mload(add(other, 0xd))) ) } } } /* * Contract that exposes the needed erc20 token functions / abstract contract ERC20Interface { // Send _value amount of tokens to address _to function transfer(address _to, uint256 _value) public virtual returns (bool success); // Get the account balance of another account with address _owner function balanceOf(address _owner) public virtual view returns (uint256 balance); } // helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false library TransferHelper { function safeApprove( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('approve(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::safeApprove: approve failed' ); } function safeTransfer( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transfer(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::safeTransfer: transfer failed' ); } function safeTransferFrom( address token, address from, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transferFrom(address,address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::transferFrom: transferFrom failed' ); } function safeTransferETH(address to, uint256 value) internal { (bool success, ) = to.call{value: value}(new bytes(0)); require(success, 'TransferHelper::safeTransferETH: ETH transfer failed'); } } /* * Contract that will forward any incoming Ether to the creator of the contract * / contract Forwarder { // Address to which any funds sent to this contract will be forwarded address public parentAddress; event ForwarderDeposited(address from, uint256 value, bytes data); /* * Initialize the contract, and sets the destination address to that of the creator / function init(address _parentAddress) external onlyUninitialized { parentAddress = _parentAddress; uint256 value = address(this).balance; if (value == 0) { return; } (bool success, ) = parentAddress.call{ value: value }(''); require(success, 'Flush failed'); // NOTE: since we are forwarding on initialization, // we don't have the context of the original sender. // We still emit an event about the forwarding but set // the sender to the forwarder itself emit ForwarderDeposited(address(this), value, msg.data); } /* * Modifier that will execute internal code block only if the sender is the parent address / modifier onlyParent { require(msg.sender == parentAddress, 'Only Parent'); _; } /* * Modifier that will execute internal code block only if the contract has not been initialized yet / modifier onlyUninitialized { require(parentAddress == address(0x0), 'Already initialized'); _; } /* * Default function; Gets called when data is sent but does not match any other function / fallback() external payable { flush(); } /* * Default function; Gets called when Ether is deposited with no data, and forwards it to the parent address / receive() external payable { flush(); } /* * Execute a token transfer of the full balance from the forwarder token to the parent address * @param tokenContractAddress the address of the erc20 token contract / function flushTokens(address tokenContractAddress) external onlyParent { ERC20Interface instance = ERC20Interface(tokenContractAddress); address forwarderAddress = address(this); uint256 forwarderBalance = instance.balanceOf(forwarderAddress); if (forwarderBalance == 0) { return; } TransferHelper.safeTransfer( tokenContractAddress, parentAddress, forwarderBalance ); } /* * Flush the entire balance of the contract to the parent address. */ function flush() public { uint256 value = address(this).balance; if (value == 0) { return; } (bool success, ) = parentAddress.call{ value: value }(''); require(success, 'Flush failed'); emit ForwarderDeposited(msg.sender, value, msg.data); } } contract ForwarderFactory is CloneFactory { address public implementationAddress; event ForwarderCreated(address newForwarderAddress, address parentAddress); constructor(address _implementationAddress) { implementationAddress = _implementationAddress; } function createForwarder(address parent, bytes32 salt) external { // include the signers in the salt so any contract deployed to a given address must have the same signers bytes32 finalSalt = keccak256(abi.encodePacked(parent, salt)); address payable clone = createClone(implementationAddress, finalSalt); Forwarder(clone).init(parent); emit ForwarderCreated(clone, parent); } }
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SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (interfaces/draft-IERC1822.sol) pragma solidity ^0.8.0; /** * @dev ERC1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified * proxy whose upgrades are fully controlled by the current implementation. / interface IERC1822Proxiable { /* * @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation * address. * * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this * function revert if invoked through a proxy. / function proxiableUUID() external view returns (bytes32); } // OpenZeppelin Contracts (last updated v4.5.0) (proxy/ERC1967/ERC1967Upgrade.sol) pragma solidity ^0.8.2; // import "../beacon/IBeacon.sol"; // import "../../interfaces/draft-IERC1822.sol"; // import "../../utils/Address.sol"; // import "../../utils/StorageSlot.sol"; /* * @dev This abstract contract provides getters and event emitting update functions for * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots. * * _Available since v4.1._ / abstract contract ERC1967Upgrade { // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1 bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143; /* * @dev Storage slot with the address of the current implementation. * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is * validated in the constructor. / bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc; /* * @dev Emitted when the implementation is upgraded. / event Upgraded(address indexed implementation); /* * @dev Returns the current implementation address. / function _getImplementation() internal view returns (address) { return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value; } /* * @dev Stores a new address in the EIP1967 implementation slot. / function _setImplementation(address newImplementation) private { require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract"); StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation; } /* * @dev Perform implementation upgrade * * Emits an {Upgraded} event. / function _upgradeTo(address newImplementation) internal { _setImplementation(newImplementation); emit Upgraded(newImplementation); } /* * @dev Perform implementation upgrade with additional setup call. * * Emits an {Upgraded} event. / function _upgradeToAndCall(address newImplementation, bytes memory data, bool forceCall) internal { _upgradeTo(newImplementation); if (data.length > 0 \|\| forceCall) { Address.functionDelegateCall(newImplementation, data); } } /* * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call. * * Emits an {Upgraded} event. / function _upgradeToAndCallUUPS(address newImplementation, bytes memory data, bool forceCall) internal { // Upgrades from old implementations will perform a rollback test. This test requires the new // implementation to upgrade back to the old, non-ERC1822 compliant, implementation. Removing // this special case will break upgrade paths from old UUPS implementation to new ones. if (StorageSlot.getBooleanSlot(_ROLLBACK_SLOT).value) { _setImplementation(newImplementation); } else { try IERC1822Proxiable(newImplementation).proxiableUUID() returns (bytes32 slot) { require(slot == _IMPLEMENTATION_SLOT, "ERC1967Upgrade: unsupported proxiableUUID"); } catch { revert("ERC1967Upgrade: new implementation is not UUPS"); } _upgradeToAndCall(newImplementation, data, forceCall); } } /* * @dev Storage slot with the admin of the contract. * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is * validated in the constructor. / bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103; /* * @dev Emitted when the admin account has changed. / event AdminChanged(address previousAdmin, address newAdmin); /* * @dev Returns the current admin. / function _getAdmin() internal view returns (address) { return StorageSlot.getAddressSlot(_ADMIN_SLOT).value; } /* * @dev Stores a new address in the EIP1967 admin slot. / function _setAdmin(address newAdmin) private { require(newAdmin != address(0), "ERC1967: new admin is the zero address"); StorageSlot.getAddressSlot(_ADMIN_SLOT).value = newAdmin; } /* * @dev Changes the admin of the proxy. * * Emits an {AdminChanged} event. / function _changeAdmin(address newAdmin) internal { emit AdminChanged(_getAdmin(), newAdmin); _setAdmin(newAdmin); } /* * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy. * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor. / bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50; /* * @dev Emitted when the beacon is upgraded. / event BeaconUpgraded(address indexed beacon); /* * @dev Returns the current beacon. / function _getBeacon() internal view returns (address) { return StorageSlot.getAddressSlot(_BEACON_SLOT).value; } /* * @dev Stores a new beacon in the EIP1967 beacon slot. / function _setBeacon(address newBeacon) private { require(Address.isContract(newBeacon), "ERC1967: new beacon is not a contract"); require( Address.isContract(IBeacon(newBeacon).implementation()), "ERC1967: beacon implementation is not a contract" ); StorageSlot.getAddressSlot(_BEACON_SLOT).value = newBeacon; } /* * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that). * * Emits a {BeaconUpgraded} event. / function _upgradeBeaconToAndCall(address newBeacon, bytes memory data, bool forceCall) internal { _setBeacon(newBeacon); emit BeaconUpgraded(newBeacon); if (data.length > 0 \|\| forceCall) { Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data); } } } // OpenZeppelin Contracts (last updated v4.6.0) (proxy/Proxy.sol) pragma solidity ^0.8.0; /* * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to * be specified by overriding the virtual {_implementation} function. * * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a * different contract through the {_delegate} function. * * The success and return data of the delegated call will be returned back to the caller of the proxy. / abstract contract Proxy { /* * @dev Delegates the current call to `implementation`. * * This function does not return to its internal call site, it will return directly to the external caller. / function _delegate(address implementation) internal virtual { assembly { // Copy msg.data. We take full control of memory in this inline assembly // block because it will not return to Solidity code. We overwrite the // Solidity scratch pad at memory position 0. calldatacopy(0, 0, calldatasize()) // Call the implementation. // out and outsize are 0 because we don't know the size yet. let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0) // Copy the returned data. returndatacopy(0, 0, returndatasize()) switch result // delegatecall returns 0 on error. case 0 { revert(0, returndatasize()) } default { return(0, returndatasize()) } } } /* * @dev This is a virtual function that should be overridden so it returns the address to which the fallback function * and {_fallback} should delegate. / function _implementation() internal view virtual returns (address); /* * @dev Delegates the current call to the address returned by `_implementation()`. * * This function does not return to its internal call site, it will return directly to the external caller. / function _fallback() internal virtual { _beforeFallback(); _delegate(_implementation()); } /* * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other * function in the contract matches the call data. / fallback() external payable virtual { _fallback(); } /* * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data * is empty. / receive() external payable virtual { _fallback(); } /* * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback` * call, or as part of the Solidity `fallback` or `receive` functions. * * If overridden should call `super._beforeFallback()`. / function _beforeFallback() internal virtual {} } // OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol) pragma solidity ^0.8.0; /* * @dev This is the interface that {BeaconProxy} expects of its beacon. / interface IBeacon { /* * @dev Must return an address that can be used as a delegate call target. * * {BeaconProxy} will check that this address is a contract. / function implementation() external view returns (address); } // OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol) pragma solidity ^0.8.1; /* * @dev Collection of functions related to the address type / library Address { /* * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * * Furthermore, `isContract` will also return true if the target contract within * the same transaction is already scheduled for destruction by `SELFDESTRUCT`, * which only has an effect at the end of a transaction. * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== / function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /* * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. / function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /* * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ / function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, "Address: low-level call failed"); } /* * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ / function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /* * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ / function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /* * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ / function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /* * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ / function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /* * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ / function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /* * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ / function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /* * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ / function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /* * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ / function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /* * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or using the provided one. * * _Available since v4.3._ / function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } // OpenZeppelin Contracts (last updated v4.7.0) (utils/StorageSlot.sol) // This file was procedurally generated from scripts/generate/templates/StorageSlot.js. pragma solidity ^0.8.0; /* * @dev Library for reading and writing primitive types to specific storage slots. * * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts. * This library helps with reading and writing to such slots without the need for inline assembly. * * The functions in this library return Slot structs that contain a `value` member that can be used to read or write. * * Example usage to set ERC1967 implementation slot: * ```solidity * contract ERC1967 { * bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc; * * function _getImplementation() internal view returns (address) { * return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value; * } * * function _setImplementation(address newImplementation) internal { * require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract"); * StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation; * } * } * ``` * * _Available since v4.1 for `address`, `bool`, `bytes32`, `uint256`._ * _Available since v4.9 for `string`, `bytes`._ / library StorageSlot { struct AddressSlot { address value; } struct BooleanSlot { bool value; } struct Bytes32Slot { bytes32 value; } struct Uint256Slot { uint256 value; } struct StringSlot { string value; } struct BytesSlot { bytes value; } /* * @dev Returns an `AddressSlot` with member `value` located at `slot`. / function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /* * @dev Returns an `BooleanSlot` with member `value` located at `slot`. / function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /* * @dev Returns an `Bytes32Slot` with member `value` located at `slot`. / function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /* * @dev Returns an `Uint256Slot` with member `value` located at `slot`. / function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /* * @dev Returns an `StringSlot` with member `value` located at `slot`. / function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /* * @dev Returns an `StringSlot` representation of the string storage pointer `store`. / function getStringSlot(string storage store) internal pure returns (StringSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := store.slot } } /* * @dev Returns an `BytesSlot` with member `value` located at `slot`. / function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /* * @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`. / function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := store.slot } } } // OpenZeppelin Contracts (last updated v4.7.0) (proxy/beacon/BeaconProxy.sol) pragma solidity ^0.8.0; // import "./IBeacon.sol"; // import "../Proxy.sol"; // import "../ERC1967/ERC1967Upgrade.sol"; /* * @dev This contract implements a proxy that gets the implementation address for each call from an {UpgradeableBeacon}. * * The beacon address is stored in storage slot `uint256(keccak256('eip1967.proxy.beacon')) - 1`, so that it doesn't * conflict with the storage layout of the implementation behind the proxy. * * _Available since v3.4._ / contract BeaconProxy is Proxy, ERC1967Upgrade { /* * @dev Initializes the proxy with `beacon`. * * If `data` is nonempty, it's used as data in a delegate call to the implementation returned by the beacon. This * will typically be an encoded function call, and allows initializing the storage of the proxy like a Solidity * constructor. * * Requirements: * * - `beacon` must be a contract with the interface {IBeacon}. / constructor(address beacon, bytes memory data) payable { _upgradeBeaconToAndCall(beacon, data, false); } /* * @dev Returns the current beacon address. / function _beacon() internal view virtual returns (address) { return _getBeacon(); } /* * @dev Returns the current implementation address of the associated beacon. / function _implementation() internal view virtual override returns (address) { return IBeacon(_getBeacon()).implementation(); } /* * @dev Changes the proxy to use a new beacon. Deprecated: see {_upgradeBeaconToAndCall}. * * If `data` is nonempty, it's used as data in a delegate call to the implementation returned by the beacon. * * Requirements: * * - `beacon` must be a contract. * - The implementation returned by `beacon` must be a contract. */ function _setBeacon(address beacon, bytes memory data) internal virtual { _upgradeBeaconToAndCall(beacon, data, false); } }
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1	19,493,163	69187c879a9422a49232983c95891b1d24e9e0f55b3fc252b871e3241360c5aa	1ab4948f3152621c808c557515b43266f8dad551590df041ac09c93fe7d1e5e4	d2c82f2e5fa236e114a81173e375a73664610998	ffa397285ce46fb78c588a9e993286aac68c37cd	894d0e53da9ce675d72655db49df01819cd82c1f	3d602d80600a3d3981f3363d3d373d3d3d363d73059ffafdc6ef594230de44f824e2bd0a51ca5ded5af43d82803e903d91602b57fd5bf3	363d3d373d3d3d363d73059ffafdc6ef594230de44f824e2bd0a51ca5ded5af43d82803e903d91602b57fd5bf3	pragma solidity 0.7.5; /* The MIT License (MIT) Copyright (c) 2018 Murray Software, LLC. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. / //solhint-disable max-line-length //solhint-disable no-inline-assembly contract CloneFactory { function createClone(address target, bytes32 salt) internal returns (address payable result) { bytes20 targetBytes = bytes20(target); assembly { // load the next free memory slot as a place to store the clone contract data let clone := mload(0x40) // The bytecode block below is responsible for contract initialization // during deployment, it is worth noting the proxied contract constructor will not be called during // the cloning procedure and that is why an initialization function needs to be called after the // clone is created mstore( clone, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000 ) // This stores the address location of the implementation contract // so that the proxy knows where to delegate call logic to mstore(add(clone, 0x14), targetBytes) // The bytecode block is the actual code that is deployed for each clone created. // It forwards all calls to the already deployed implementation via a delegatecall mstore( add(clone, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000 ) // deploy the contract using the CREATE2 opcode // this deploys the minimal proxy defined above, which will proxy all // calls to use the logic defined in the implementation contract `target` result := create2(0, clone, 0x37, salt) } } function isClone(address target, address query) internal view returns (bool result) { bytes20 targetBytes = bytes20(target); assembly { // load the next free memory slot as a place to store the comparison clone let clone := mload(0x40) // The next three lines store the expected bytecode for a miniml proxy // that targets `target` as its implementation contract mstore( clone, 0x363d3d373d3d3d363d7300000000000000000000000000000000000000000000 ) mstore(add(clone, 0xa), targetBytes) mstore( add(clone, 0x1e), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000 ) // the next two lines store the bytecode of the contract that we are checking in memory let other := add(clone, 0x40) extcodecopy(query, other, 0, 0x2d) // Check if the expected bytecode equals the actual bytecode and return the result result := and( eq(mload(clone), mload(other)), eq(mload(add(clone, 0xd)), mload(add(other, 0xd))) ) } } } /* * Contract that exposes the needed erc20 token functions / abstract contract ERC20Interface { // Send _value amount of tokens to address _to function transfer(address _to, uint256 _value) public virtual returns (bool success); // Get the account balance of another account with address _owner function balanceOf(address _owner) public virtual view returns (uint256 balance); } // helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false library TransferHelper { function safeApprove( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('approve(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::safeApprove: approve failed' ); } function safeTransfer( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transfer(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::safeTransfer: transfer failed' ); } function safeTransferFrom( address token, address from, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transferFrom(address,address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::transferFrom: transferFrom failed' ); } function safeTransferETH(address to, uint256 value) internal { (bool success, ) = to.call{value: value}(new bytes(0)); require(success, 'TransferHelper::safeTransferETH: ETH transfer failed'); } } /* * Contract that will forward any incoming Ether to the creator of the contract * / contract Forwarder { // Address to which any funds sent to this contract will be forwarded address public parentAddress; event ForwarderDeposited(address from, uint256 value, bytes data); /* * Initialize the contract, and sets the destination address to that of the creator / function init(address _parentAddress) external onlyUninitialized { parentAddress = _parentAddress; uint256 value = address(this).balance; if (value == 0) { return; } (bool success, ) = parentAddress.call{ value: value }(''); require(success, 'Flush failed'); // NOTE: since we are forwarding on initialization, // we don't have the context of the original sender. // We still emit an event about the forwarding but set // the sender to the forwarder itself emit ForwarderDeposited(address(this), value, msg.data); } /* * Modifier that will execute internal code block only if the sender is the parent address / modifier onlyParent { require(msg.sender == parentAddress, 'Only Parent'); _; } /* * Modifier that will execute internal code block only if the contract has not been initialized yet / modifier onlyUninitialized { require(parentAddress == address(0x0), 'Already initialized'); _; } /* * Default function; Gets called when data is sent but does not match any other function / fallback() external payable { flush(); } /* * Default function; Gets called when Ether is deposited with no data, and forwards it to the parent address / receive() external payable { flush(); } /* * Execute a token transfer of the full balance from the forwarder token to the parent address * @param tokenContractAddress the address of the erc20 token contract / function flushTokens(address tokenContractAddress) external onlyParent { ERC20Interface instance = ERC20Interface(tokenContractAddress); address forwarderAddress = address(this); uint256 forwarderBalance = instance.balanceOf(forwarderAddress); if (forwarderBalance == 0) { return; } TransferHelper.safeTransfer( tokenContractAddress, parentAddress, forwarderBalance ); } /* * Flush the entire balance of the contract to the parent address. */ function flush() public { uint256 value = address(this).balance; if (value == 0) { return; } (bool success, ) = parentAddress.call{ value: value }(''); require(success, 'Flush failed'); emit ForwarderDeposited(msg.sender, value, msg.data); } } contract ForwarderFactory is CloneFactory { address public implementationAddress; event ForwarderCreated(address newForwarderAddress, address parentAddress); constructor(address _implementationAddress) { implementationAddress = _implementationAddress; } function createForwarder(address parent, bytes32 salt) external { // include the signers in the salt so any contract deployed to a given address must have the same signers bytes32 finalSalt = keccak256(abi.encodePacked(parent, salt)); address payable clone = createClone(implementationAddress, finalSalt); Forwarder(clone).init(parent); emit ForwarderCreated(clone, parent); } }
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File: contracts/interfaces/IUniswapV2Pair.sol pragma solidity >=0.5.0; interface IUniswapV2Pair { event Approval(address indexed owner, address indexed spender, uint value); event Transfer(address indexed from, address indexed to, uint value); function name() external pure returns (string memory); function symbol() external pure returns (string memory); function decimals() external pure returns (uint8); function totalSupply() external view returns (uint); function balanceOf(address owner) external view returns (uint); function allowance(address owner, address spender) external view returns (uint); function approve(address spender, uint value) external returns (bool); function transfer(address to, uint value) external returns (bool); function transferFrom(address from, address to, uint value) external returns (bool); function DOMAIN_SEPARATOR() external view returns (bytes32); function PERMIT_TYPEHASH() external pure returns (bytes32); function nonces(address owner) external view returns (uint); function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external; event Mint(address indexed sender, uint amount0, uint amount1); event Burn(address indexed sender, uint amount0, uint amount1, address indexed to); event Swap( address indexed sender, uint amount0In, uint amount1In, uint amount0Out, uint amount1Out, address indexed to ); event Sync(uint112 reserve0, uint112 reserve1); function MINIMUM_LIQUIDITY() external pure returns (uint); function factory() external view returns (address); function token0() external view returns (address); function token1() external view returns (address); function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast); function price0CumulativeLast() external view returns (uint); function price1CumulativeLast() external view returns (uint); function kLast() external view returns (uint); function mint(address to) external returns (uint liquidity); function burn(address to) external returns (uint amount0, uint amount1); function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external; function skim(address to) external; function sync() external; function initialize(address, address) external; } // File: contracts/interfaces/IUniswapV2ERC20.sol pragma solidity >=0.5.0; interface IUniswapV2ERC20 { event Approval(address indexed owner, address indexed spender, uint value); event Transfer(address indexed from, address indexed to, uint value); function name() external pure returns (string memory); function symbol() external pure returns (string memory); function decimals() external pure returns (uint8); function totalSupply() external view returns (uint); function balanceOf(address owner) external view returns (uint); function allowance(address owner, address spender) external view returns (uint); function approve(address spender, uint value) external returns (bool); function transfer(address to, uint value) external returns (bool); function transferFrom(address from, address to, uint value) external returns (bool); function DOMAIN_SEPARATOR() external view returns (bytes32); function PERMIT_TYPEHASH() external pure returns (bytes32); function nonces(address owner) external view returns (uint); function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external; } // File: contracts/libraries/SafeMath.sol pragma solidity =0.5.16; // a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math) library SafeMath { function add(uint x, uint y) internal pure returns (uint z) { require((z = x + y) >= x, 'ds-math-add-overflow'); } function sub(uint x, uint y) internal pure returns (uint z) { require((z = x - y) <= x, 'ds-math-sub-underflow'); } function mul(uint x, uint y) internal pure returns (uint z) { require(y == 0 \|\| (z = x * y) / y == x, 'ds-math-mul-overflow'); } } // File: contracts/UniswapV2ERC20.sol pragma solidity =0.5.16; contract UniswapV2ERC20 is IUniswapV2ERC20 { using SafeMath for uint; string public constant name = 'Uniswap V2'; string public constant symbol = 'UNI-V2'; uint8 public constant decimals = 18; uint public totalSupply; mapping(address => uint) public balanceOf; mapping(address => mapping(address => uint)) public allowance; bytes32 public DOMAIN_SEPARATOR; // keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"); bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9; mapping(address => uint) public nonces; event Approval(address indexed owner, address indexed spender, uint value); event Transfer(address indexed from, address indexed to, uint value); constructor() public { uint chainId; assembly { chainId := chainid } DOMAIN_SEPARATOR = keccak256( abi.encode( keccak256('EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)'), keccak256(bytes(name)), keccak256(bytes('1')), chainId, address(this) ) ); } function _mint(address to, uint value) internal { totalSupply = totalSupply.add(value); balanceOf[to] = balanceOf[to].add(value); emit Transfer(address(0), to, value); } function _burn(address from, uint value) internal { balanceOf[from] = balanceOf[from].sub(value); totalSupply = totalSupply.sub(value); emit Transfer(from, address(0), value); } function _approve(address owner, address spender, uint value) private { allowance[owner][spender] = value; emit Approval(owner, spender, value); } function _transfer(address from, address to, uint value) private { balanceOf[from] = balanceOf[from].sub(value); balanceOf[to] = balanceOf[to].add(value); emit Transfer(from, to, value); } function approve(address spender, uint value) external returns (bool) { _approve(msg.sender, spender, value); return true; } function transfer(address to, uint value) external returns (bool) { _transfer(msg.sender, to, value); return true; } function transferFrom(address from, address to, uint value) external returns (bool) { if (allowance[from][msg.sender] != uint(-1)) { allowance[from][msg.sender] = allowance[from][msg.sender].sub(value); } _transfer(from, to, value); return true; } function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external { require(deadline >= block.timestamp, 'UniswapV2: EXPIRED'); bytes32 digest = keccak256( abi.encodePacked( '\x19\x01', DOMAIN_SEPARATOR, keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline)) ) ); address recoveredAddress = ecrecover(digest, v, r, s); require(recoveredAddress != address(0) && recoveredAddress == owner, 'UniswapV2: INVALID_SIGNATURE'); _approve(owner, spender, value); } } // File: contracts/libraries/Math.sol pragma solidity =0.5.16; // a library for performing various math operations library Math { function min(uint x, uint y) internal pure returns (uint z) { z = x < y ? x : y; } // babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method) function sqrt(uint y) internal pure returns (uint z) { if (y > 3) { z = y; uint x = y / 2 + 1; while (x < z) { z = x; x = (y / x + x) / 2; } } else if (y != 0) { z = 1; } } } // File: contracts/libraries/UQ112x112.sol pragma solidity =0.5.16; // a library for handling binary fixed point numbers (https://en.wikipedia.org/wiki/Q_(number_format)) // range: [0, 2112 - 1] // resolution: 1 / 2112 library UQ112x112 { uint224 constant Q112 = 2*112; // encode a uint112 as a UQ112x112 function encode(uint112 y) internal pure returns (uint224 z) { z = uint224(y) Q112; // never overflows } // divide a UQ112x112 by a uint112, returning a UQ112x112 function uqdiv(uint224 x, uint112 y) internal pure returns (uint224 z) { z = x / uint224(y); } } // File: contracts/interfaces/IERC20.sol pragma solidity >=0.5.0; interface IERC20 { event Approval(address indexed owner, address indexed spender, uint value); event Transfer(address indexed from, address indexed to, uint value); function name() external view returns (string memory); function symbol() external view returns (string memory); function decimals() external view returns (uint8); function totalSupply() external view returns (uint); function balanceOf(address owner) external view returns (uint); function allowance(address owner, address spender) external view returns (uint); function approve(address spender, uint value) external returns (bool); function transfer(address to, uint value) external returns (bool); function transferFrom(address from, address to, uint value) external returns (bool); } // File: contracts/interfaces/IUniswapV2Factory.sol pragma solidity >=0.5.0; interface IUniswapV2Factory { event PairCreated(address indexed token0, address indexed token1, address pair, uint); function feeTo() external view returns (address); function feeToSetter() external view returns (address); function getPair(address tokenA, address tokenB) external view returns (address pair); function allPairs(uint) external view returns (address pair); function allPairsLength() external view returns (uint); function createPair(address tokenA, address tokenB) external returns (address pair); function setFeeTo(address) external; function setFeeToSetter(address) external; } // File: contracts/interfaces/IUniswapV2Callee.sol pragma solidity >=0.5.0; interface IUniswapV2Callee { function uniswapV2Call(address sender, uint amount0, uint amount1, bytes calldata data) external; } // File: contracts/UniswapV2Pair.sol pragma solidity =0.5.16; contract UniswapV2Pair is IUniswapV2Pair, UniswapV2ERC20 { using SafeMath for uint; using UQ112x112 for uint224; uint public constant MINIMUM_LIQUIDITY = 10*3; bytes4 private constant SELECTOR = bytes4(keccak256(bytes('transfer(address,uint256)'))); address public factory; address public token0; address public token1; uint112 private reserve0; // uses single storage slot, accessible via getReserves uint112 private reserve1; // uses single storage slot, accessible via getReserves uint32 private blockTimestampLast; // uses single storage slot, accessible via getReserves uint public price0CumulativeLast; uint public price1CumulativeLast; uint public kLast; // reserve0 reserve1, as of immediately after the most recent liquidity event uint private unlocked = 1; modifier lock() { require(unlocked == 1, 'UniswapV2: LOCKED'); unlocked = 0; _; unlocked = 1; } function getReserves() public view returns (uint112 _reserve0, uint112 _reserve1, uint32 _blockTimestampLast) { _reserve0 = reserve0; _reserve1 = reserve1; _blockTimestampLast = blockTimestampLast; } function _safeTransfer(address token, address to, uint value) private { (bool success, bytes memory data) = token.call(abi.encodeWithSelector(SELECTOR, to, value)); require(success && (data.length == 0 \|\| abi.decode(data, (bool))), 'UniswapV2: TRANSFER_FAILED'); } event Mint(address indexed sender, uint amount0, uint amount1); event Burn(address indexed sender, uint amount0, uint amount1, address indexed to); event Swap( address indexed sender, uint amount0In, uint amount1In, uint amount0Out, uint amount1Out, address indexed to ); event Sync(uint112 reserve0, uint112 reserve1); constructor() public { factory = msg.sender; } // called once by the factory at time of deployment function initialize(address _token0, address _token1) external { require(msg.sender == factory, 'UniswapV2: FORBIDDEN'); // sufficient check token0 = _token0; token1 = _token1; } // update reserves and, on the first call per block, price accumulators function _update(uint balance0, uint balance1, uint112 _reserve0, uint112 _reserve1) private { require(balance0 <= uint112(-1) && balance1 <= uint112(-1), 'UniswapV2: OVERFLOW'); uint32 blockTimestamp = uint32(block.timestamp % 2*32); uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired if (timeElapsed > 0 && _reserve0 != 0 && _reserve1 != 0) { // never overflows, and + overflow is desired price0CumulativeLast += uint(UQ112x112.encode(_reserve1).uqdiv(_reserve0)) * timeElapsed; price1CumulativeLast += uint(UQ112x112.encode(_reserve0).uqdiv(_reserve1)) * timeElapsed; } reserve0 = uint112(balance0); reserve1 = uint112(balance1); blockTimestampLast = blockTimestamp; emit Sync(reserve0, reserve1); } // if fee is on, mint liquidity equivalent to 1/6th of the growth in sqrt(k) function _mintFee(uint112 _reserve0, uint112 _reserve1) private returns (bool feeOn) { address feeTo = IUniswapV2Factory(factory).feeTo(); feeOn = feeTo != address(0); uint _kLast = kLast; // gas savings if (feeOn) { if (_kLast != 0) { uint rootK = Math.sqrt(uint(_reserve0).mul(_reserve1)); uint rootKLast = Math.sqrt(_kLast); if (rootK > rootKLast) { uint numerator = totalSupply.mul(rootK.sub(rootKLast)); uint denominator = rootK.mul(5).add(rootKLast); uint liquidity = numerator / denominator; if (liquidity > 0) _mint(feeTo, liquidity); } } } else if (_kLast != 0) { kLast = 0; } } // this low-level function should be called from a contract which performs important safety checks function mint(address to) external lock returns (uint liquidity) { (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings uint balance0 = IERC20(token0).balanceOf(address(this)); uint balance1 = IERC20(token1).balanceOf(address(this)); uint amount0 = balance0.sub(_reserve0); uint amount1 = balance1.sub(_reserve1); bool feeOn = _mintFee(_reserve0, _reserve1); uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee if (_totalSupply == 0) { liquidity = Math.sqrt(amount0.mul(amount1)).sub(MINIMUM_LIQUIDITY); _mint(address(0), MINIMUM_LIQUIDITY); // permanently lock the first MINIMUM_LIQUIDITY tokens } else { liquidity = Math.min(amount0.mul(_totalSupply) / _reserve0, amount1.mul(_totalSupply) / _reserve1); } require(liquidity > 0, 'UniswapV2: INSUFFICIENT_LIQUIDITY_MINTED'); _mint(to, liquidity); _update(balance0, balance1, _reserve0, _reserve1); if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date emit Mint(msg.sender, amount0, amount1); } // this low-level function should be called from a contract which performs important safety checks function burn(address to) external lock returns (uint amount0, uint amount1) { (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings address _token0 = token0; // gas savings address _token1 = token1; // gas savings uint balance0 = IERC20(_token0).balanceOf(address(this)); uint balance1 = IERC20(_token1).balanceOf(address(this)); uint liquidity = balanceOf[address(this)]; bool feeOn = _mintFee(_reserve0, _reserve1); uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee amount0 = liquidity.mul(balance0) / _totalSupply; // using balances ensures pro-rata distribution amount1 = liquidity.mul(balance1) / _totalSupply; // using balances ensures pro-rata distribution require(amount0 > 0 && amount1 > 0, 'UniswapV2: INSUFFICIENT_LIQUIDITY_BURNED'); _burn(address(this), liquidity); _safeTransfer(_token0, to, amount0); _safeTransfer(_token1, to, amount1); balance0 = IERC20(_token0).balanceOf(address(this)); balance1 = IERC20(_token1).balanceOf(address(this)); _update(balance0, balance1, _reserve0, _reserve1); if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date emit Burn(msg.sender, amount0, amount1, to); } // this low-level function should be called from a contract which performs important safety checks function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external lock { require(amount0Out > 0 \|\| amount1Out > 0, 'UniswapV2: INSUFFICIENT_OUTPUT_AMOUNT'); (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings require(amount0Out < _reserve0 && amount1Out < _reserve1, 'UniswapV2: INSUFFICIENT_LIQUIDITY'); uint balance0; uint balance1; { // scope for _token{0,1}, avoids stack too deep errors address _token0 = token0; address _token1 = token1; require(to != _token0 && to != _token1, 'UniswapV2: INVALID_TO'); if (amount0Out > 0) _safeTransfer(_token0, to, amount0Out); // optimistically transfer tokens if (amount1Out > 0) _safeTransfer(_token1, to, amount1Out); // optimistically transfer tokens if (data.length > 0) IUniswapV2Callee(to).uniswapV2Call(msg.sender, amount0Out, amount1Out, data); balance0 = IERC20(_token0).balanceOf(address(this)); balance1 = IERC20(_token1).balanceOf(address(this)); } uint amount0In = balance0 > _reserve0 - amount0Out ? balance0 - (_reserve0 - amount0Out) : 0; uint amount1In = balance1 > _reserve1 - amount1Out ? balance1 - (_reserve1 - amount1Out) : 0; require(amount0In > 0 \|\| amount1In > 0, 'UniswapV2: INSUFFICIENT_INPUT_AMOUNT'); { // scope for reserve{0,1}Adjusted, avoids stack too deep errors uint balance0Adjusted = balance0.mul(1000).sub(amount0In.mul(3)); uint balance1Adjusted = balance1.mul(1000).sub(amount1In.mul(3)); require(balance0Adjusted.mul(balance1Adjusted) >= uint(_reserve0).mul(_reserve1).mul(1000**2), 'UniswapV2: K'); } _update(balance0, balance1, _reserve0, _reserve1); emit Swap(msg.sender, amount0In, amount1In, amount0Out, amount1Out, to); } // force balances to match reserves function skim(address to) external lock { address _token0 = token0; // gas savings address _token1 = token1; // gas savings _safeTransfer(_token0, to, IERC20(_token0).balanceOf(address(this)).sub(reserve0)); _safeTransfer(_token1, to, IERC20(_token1).balanceOf(address(this)).sub(reserve1)); } // force reserves to match balances function sync() external lock { _update(IERC20(token0).balanceOf(address(this)), IERC20(token1).balanceOf(address(this)), reserve0, reserve1); } }
1	19,493,167	150f6faaff7bbde9dbe00a11f45b297eea99d93430e88b7be9150dd980865739	d63f98058a11b971b743f92b8fe2aff34845116841989d20e3a328f8981402c7	d2c82f2e5fa236e114a81173e375a73664610998	ffa397285ce46fb78c588a9e993286aac68c37cd	a4f8a2c5d1d5ae84ba73f0de2fd3c52d2d459c77	3d602d80600a3d3981f3363d3d373d3d3d363d73059ffafdc6ef594230de44f824e2bd0a51ca5ded5af43d82803e903d91602b57fd5bf3	363d3d373d3d3d363d73059ffafdc6ef594230de44f824e2bd0a51ca5ded5af43d82803e903d91602b57fd5bf3	pragma solidity 0.7.5; /* The MIT License (MIT) Copyright (c) 2018 Murray Software, LLC. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. / //solhint-disable max-line-length //solhint-disable no-inline-assembly contract CloneFactory { function createClone(address target, bytes32 salt) internal returns (address payable result) { bytes20 targetBytes = bytes20(target); assembly { // load the next free memory slot as a place to store the clone contract data let clone := mload(0x40) // The bytecode block below is responsible for contract initialization // during deployment, it is worth noting the proxied contract constructor will not be called during // the cloning procedure and that is why an initialization function needs to be called after the // clone is created mstore( clone, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000 ) // This stores the address location of the implementation contract // so that the proxy knows where to delegate call logic to mstore(add(clone, 0x14), targetBytes) // The bytecode block is the actual code that is deployed for each clone created. // It forwards all calls to the already deployed implementation via a delegatecall mstore( add(clone, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000 ) // deploy the contract using the CREATE2 opcode // this deploys the minimal proxy defined above, which will proxy all // calls to use the logic defined in the implementation contract `target` result := create2(0, clone, 0x37, salt) } } function isClone(address target, address query) internal view returns (bool result) { bytes20 targetBytes = bytes20(target); assembly { // load the next free memory slot as a place to store the comparison clone let clone := mload(0x40) // The next three lines store the expected bytecode for a miniml proxy // that targets `target` as its implementation contract mstore( clone, 0x363d3d373d3d3d363d7300000000000000000000000000000000000000000000 ) mstore(add(clone, 0xa), targetBytes) mstore( add(clone, 0x1e), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000 ) // the next two lines store the bytecode of the contract that we are checking in memory let other := add(clone, 0x40) extcodecopy(query, other, 0, 0x2d) // Check if the expected bytecode equals the actual bytecode and return the result result := and( eq(mload(clone), mload(other)), eq(mload(add(clone, 0xd)), mload(add(other, 0xd))) ) } } } /* * Contract that exposes the needed erc20 token functions / abstract contract ERC20Interface { // Send _value amount of tokens to address _to function transfer(address _to, uint256 _value) public virtual returns (bool success); // Get the account balance of another account with address _owner function balanceOf(address _owner) public virtual view returns (uint256 balance); } // helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false library TransferHelper { function safeApprove( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('approve(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::safeApprove: approve failed' ); } function safeTransfer( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transfer(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::safeTransfer: transfer failed' ); } function safeTransferFrom( address token, address from, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transferFrom(address,address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::transferFrom: transferFrom failed' ); } function safeTransferETH(address to, uint256 value) internal { (bool success, ) = to.call{value: value}(new bytes(0)); require(success, 'TransferHelper::safeTransferETH: ETH transfer failed'); } } /* * Contract that will forward any incoming Ether to the creator of the contract * / contract Forwarder { // Address to which any funds sent to this contract will be forwarded address public parentAddress; event ForwarderDeposited(address from, uint256 value, bytes data); /* * Initialize the contract, and sets the destination address to that of the creator / function init(address _parentAddress) external onlyUninitialized { parentAddress = _parentAddress; uint256 value = address(this).balance; if (value == 0) { return; } (bool success, ) = parentAddress.call{ value: value }(''); require(success, 'Flush failed'); // NOTE: since we are forwarding on initialization, // we don't have the context of the original sender. // We still emit an event about the forwarding but set // the sender to the forwarder itself emit ForwarderDeposited(address(this), value, msg.data); } /* * Modifier that will execute internal code block only if the sender is the parent address / modifier onlyParent { require(msg.sender == parentAddress, 'Only Parent'); _; } /* * Modifier that will execute internal code block only if the contract has not been initialized yet / modifier onlyUninitialized { require(parentAddress == address(0x0), 'Already initialized'); _; } /* * Default function; Gets called when data is sent but does not match any other function / fallback() external payable { flush(); } /* * Default function; Gets called when Ether is deposited with no data, and forwards it to the parent address / receive() external payable { flush(); } /* * Execute a token transfer of the full balance from the forwarder token to the parent address * @param tokenContractAddress the address of the erc20 token contract / function flushTokens(address tokenContractAddress) external onlyParent { ERC20Interface instance = ERC20Interface(tokenContractAddress); address forwarderAddress = address(this); uint256 forwarderBalance = instance.balanceOf(forwarderAddress); if (forwarderBalance == 0) { return; } TransferHelper.safeTransfer( tokenContractAddress, parentAddress, forwarderBalance ); } /* * Flush the entire balance of the contract to the parent address. */ function flush() public { uint256 value = address(this).balance; if (value == 0) { return; } (bool success, ) = parentAddress.call{ value: value }(''); require(success, 'Flush failed'); emit ForwarderDeposited(msg.sender, value, msg.data); } } contract ForwarderFactory is CloneFactory { address public implementationAddress; event ForwarderCreated(address newForwarderAddress, address parentAddress); constructor(address _implementationAddress) { implementationAddress = _implementationAddress; } function createForwarder(address parent, bytes32 salt) external { // include the signers in the salt so any contract deployed to a given address must have the same signers bytes32 finalSalt = keccak256(abi.encodePacked(parent, salt)); address payable clone = createClone(implementationAddress, finalSalt); Forwarder(clone).init(parent); emit ForwarderCreated(clone, parent); } }
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pragma version 0.3.10 # pragma optimize codesize # pragma evm-version shanghai """ @title CurveStableSwapNG @author Curve.Fi @license Copyright (c) Curve.Fi, 2020-2023 - all rights reserved @notice Stableswap implementation for up to 8 coins with no rehypothecation, i.e. the AMM does not deposit tokens into other contracts. The Pool contract also records exponential moving averages for coins relative to coin 0. @dev Asset Types: 0. Standard ERC20 token with no additional features. Note: Users are advised to do careful due-diligence on ERC20 tokens that they interact with, as this contract cannot differentiate between harmless and malicious ERC20 tokens. 1. Oracle - token with rate oracle (e.g. wstETH) Note: Oracles may be controlled externally by an EOA. Users are advised to proceed with caution. 2. Rebasing - token with rebase (e.g. stETH). Note: Users and Integrators are advised to understand how the AMM contract works with rebasing balances. 3. ERC4626 - token with convertToAssets method (e.g. sDAI). Note: Some ERC4626 implementations may be susceptible to Donation/Inflation attacks. Users are advised to proceed with caution. NOTE: Pool Cannot support tokens with multiple asset types: e.g. ERC4626 with fees are not supported. Supports: 1. ERC20 support for return True/revert, return True/False, return None 2. ERC20 tokens can have arbitrary decimals (<=18). 3. ERC20 tokens that rebase (either positive or fee on transfer) 4. ERC20 tokens that have a rate oracle (e.g. wstETH, cbETH, sDAI, etc.) Note: Oracle precision _must_ be 1018. 5. ERC4626 tokens with arbitrary precision (<=18) of Vault token and underlying asset. Additional features include: 1. Adds price oracles based on AMM State Price (and _not_ last traded price). 2. Adds TVL oracle based on D. 3. `exchange_received`: swaps that expect an ERC20 transfer to have occurred prior to executing the swap. Note: a. If pool contains rebasing tokens and one of the `asset_types` is 2 (Rebasing) then calling `exchange_received` will REVERT. b. If pool contains rebasing token and `asset_types` does not contain 2 (Rebasing) then this is an incorrect implementation and rebases can be stolen. 4. Adds `get_dx`: Similar to `get_dy` which returns an expected output of coin[j] for given `dx` amount of coin[i], `get_dx` returns expected input of coin[i] for an output amount of coin[j]. 5. Fees are dynamic: AMM will charge a higher fee if pool depegs. This can cause very slight discrepancies between calculated fees and realised fees. """ from vyper.interfaces import ERC20 from vyper.interfaces import ERC20Detailed from vyper.interfaces import ERC4626 implements: ERC20 # ------------------------------- Interfaces --------------------------------- interface Factory: def fee_receiver() -> address: view def admin() -> address: view def views_implementation() -> address: view interface ERC1271: def isValidSignature(_hash: bytes32, _signature: Bytes[65]) -> bytes32: view interface StableSwapViews: def get_dx(i: int128, j: int128, dy: uint256, pool: address) -> uint256: view def get_dy(i: int128, j: int128, dx: uint256, pool: address) -> uint256: view def dynamic_fee(i: int128, j: int128, pool: address) -> uint256: view def calc_token_amount( _amounts: DynArray[uint256, MAX_COINS], _is_deposit: bool, _pool: address ) -> uint256: view # --------------------------------- Events ----------------------------------- event Transfer: sender: indexed(address) receiver: indexed(address) value: uint256 event Approval: owner: indexed(address) spender: indexed(address) value: uint256 event TokenExchange: buyer: indexed(address) sold_id: int128 tokens_sold: uint256 bought_id: int128 tokens_bought: uint256 event TokenExchangeUnderlying: buyer: indexed(address) sold_id: int128 tokens_sold: uint256 bought_id: int128 tokens_bought: uint256 event AddLiquidity: provider: indexed(address) token_amounts: DynArray[uint256, MAX_COINS] fees: DynArray[uint256, MAX_COINS] invariant: uint256 token_supply: uint256 event RemoveLiquidity: provider: indexed(address) token_amounts: DynArray[uint256, MAX_COINS] fees: DynArray[uint256, MAX_COINS] token_supply: uint256 event RemoveLiquidityOne: provider: indexed(address) token_id: int128 token_amount: uint256 coin_amount: uint256 token_supply: uint256 event RemoveLiquidityImbalance: provider: indexed(address) token_amounts: DynArray[uint256, MAX_COINS] fees: DynArray[uint256, MAX_COINS] invariant: uint256 token_supply: uint256 event RampA: old_A: uint256 new_A: uint256 initial_time: uint256 future_time: uint256 event StopRampA: A: uint256 t: uint256 event ApplyNewFee: fee: uint256 offpeg_fee_multiplier: uint256 event SetNewMATime: ma_exp_time: uint256 D_ma_time: uint256 MAX_COINS: constant(uint256) = 8 # max coins is 8 in the factory MAX_COINS_128: constant(int128) = 8 # ---------------------------- Pool Variables -------------------------------- N_COINS: public(immutable(uint256)) N_COINS_128: immutable(int128) PRECISION: constant(uint256) = 10 18 factory: immutable(Factory) coins: public(immutable(DynArray[address, MAX_COINS])) asset_types: immutable(DynArray[uint8, MAX_COINS]) pool_contains_rebasing_tokens: immutable(bool) stored_balances: DynArray[uint256, MAX_COINS] # Fee specific vars FEE_DENOMINATOR: constant(uint256) = 10 ** 10 fee: public(uint256) # fee * 1e10 offpeg_fee_multiplier: public(uint256) # * 1e10 admin_fee: public(constant(uint256)) = 5000000000 MAX_FEE: constant(uint256) = 5 * 10 9 # ---------------------- Pool Amplification Parameters ----------------------- A_PRECISION: constant(uint256) = 100 MAX_A: constant(uint256) = 10 6 MAX_A_CHANGE: constant(uint256) = 10 initial_A: public(uint256) future_A: public(uint256) initial_A_time: public(uint256) future_A_time: public(uint256) # ---------------------------- Admin Variables ------------------------------- MIN_RAMP_TIME: constant(uint256) = 86400 admin_balances: public(DynArray[uint256, MAX_COINS]) # ----------------------- Oracle Specific vars ------------------------------- rate_multipliers: immutable(DynArray[uint256, MAX_COINS]) # [bytes4 method_id][bytes8 <empty>][bytes20 oracle] rate_oracles: immutable(DynArray[uint256, MAX_COINS]) # For ERC4626 tokens, we need: call_amount: immutable(DynArray[uint256, MAX_COINS]) scale_factor: immutable(DynArray[uint256, MAX_COINS]) last_prices_packed: DynArray[uint256, MAX_COINS] # packing: last_price, ma_price last_D_packed: uint256 # packing: last_D, ma_D ma_exp_time: public(uint256) D_ma_time: public(uint256) ma_last_time: public(uint256) # packing: ma_last_time_p, ma_last_time_D # ma_last_time has a distinction for p and D because p is _not_ updated if # users remove_liquidity, but D is. # shift(232 - 1, 224) ORACLE_BIT_MASK: constant(uint256) = (232 - 1) * 256*28 # --------------------------- ERC20 Specific Vars ---------------------------- name: public(immutable(String[64])) symbol: public(immutable(String[32])) decimals: public(constant(uint8)) = 18 version: public(constant(String[8])) = "v7.0.0" balanceOf: public(HashMap[address, uint256]) allowance: public(HashMap[address, HashMap[address, uint256]]) total_supply: uint256 nonces: public(HashMap[address, uint256]) # keccak256("isValidSignature(bytes32,bytes)")[:4] << 224 ERC1271_MAGIC_VAL: constant(bytes32) = 0x1626ba7e00000000000000000000000000000000000000000000000000000000 EIP712_TYPEHASH: constant(bytes32) = keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract,bytes32 salt)") EIP2612_TYPEHASH: constant(bytes32) = keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)") VERSION_HASH: constant(bytes32) = keccak256(version) NAME_HASH: immutable(bytes32) CACHED_CHAIN_ID: immutable(uint256) salt: public(immutable(bytes32)) CACHED_DOMAIN_SEPARATOR: immutable(bytes32) # ------------------------------ AMM Setup ----------------------------------- @external def __init__( _name: String[32], _symbol: String[10], _A: uint256, _fee: uint256, _offpeg_fee_multiplier: uint256, _ma_exp_time: uint256, _coins: DynArray[address, MAX_COINS], _rate_multipliers: DynArray[uint256, MAX_COINS], _asset_types: DynArray[uint8, MAX_COINS], _method_ids: DynArray[bytes4, MAX_COINS], _oracles: DynArray[address, MAX_COINS], ): """ @notice Initialize the pool contract @param _name Name of the new plain pool. @param _symbol Symbol for the new plain pool. @param _A Amplification co-efficient - a lower value here means less tolerance for imbalance within the pool's assets. Suggested values include: Uncollateralized algorithmic stablecoins: 5-10 * Non-redeemable, collateralized assets: 100 * Redeemable assets: 200-400 @param _fee Trade fee, given as an integer with 1e10 precision. The the maximum is 1% (100000000). 50% of the fee is distributed to veCRV holders. @param _offpeg_fee_multiplier A multiplier that determines how much to increase Fees by when assets in the AMM depeg. Example value: 20000000000 @param _ma_exp_time Averaging window of oracle. Set as time_in_seconds / ln(2) Example: for 10 minute EMA, _ma_exp_time is 600 / ln(2) ~= 866 @param _coins List of addresses of the coins being used in the pool. @param _rate_multipliers An array of: [10 (36 - _coins[n].decimals()), ... for n in range(N_COINS)] @param _asset_types Array of uint8 representing tokens in pool @param _method_ids Array of first four bytes of the Keccak-256 hash of the function signatures of the oracle addresses that gives rate oracles. Calculated as: keccak(text=event_signature.replace(" ", ""))[:4] @param _oracles Array of rate oracle addresses. """ coins = _coins asset_types = _asset_types pool_contains_rebasing_tokens = 2 in asset_types __n_coins: uint256 = len(_coins) N_COINS = __n_coins N_COINS_128 = convert(__n_coins, int128) rate_multipliers = _rate_multipliers factory = Factory(msg.sender) A: uint256 = unsafe_mul(_A, A_PRECISION) self.initial_A = A self.future_A = A self.fee = _fee self.offpeg_fee_multiplier = _offpeg_fee_multiplier assert _ma_exp_time != 0 self.ma_exp_time = _ma_exp_time self.D_ma_time = 62324 # <--------- 12 hours default on contract start. self.ma_last_time = self.pack_2(block.timestamp, block.timestamp) # ------------------- initialize storage for DynArrays ------------------ _call_amount: DynArray[uint256, MAX_COINS] = empty(DynArray[uint256, MAX_COINS]) _scale_factor: DynArray[uint256, MAX_COINS] = empty(DynArray[uint256, MAX_COINS]) _rate_oracles: DynArray[uint256, MAX_COINS] = empty(DynArray[uint256, MAX_COINS]) for i in range(N_COINS_128, bound=MAX_COINS_128): if i < N_COINS_128 - 1: self.last_prices_packed.append(self.pack_2(1018, 10*18)) _rate_oracles.append(convert(_method_ids[i], uint256) 2224 \| convert(_oracles[i], uint256)) self.stored_balances.append(0) self.admin_balances.append(0) if _asset_types[i] == 3: _call_amount.append(10convert(ERC20Detailed(_coins[i]).decimals(), uint256)) _underlying_asset: address = ERC4626(_coins[i]).asset() _scale_factor.append(10(18 - convert(ERC20Detailed(_underlying_asset).decimals(), uint256))) else: _call_amount.append(0) _scale_factor.append(0) call_amount = _call_amount scale_factor = _scale_factor rate_oracles = _rate_oracles # ----------------------------- ERC20 stuff ------------------------------ name = _name symbol = _symbol # EIP712 related params ----------------- NAME_HASH = keccak256(name) salt = block.prevhash CACHED_CHAIN_ID = chain.id CACHED_DOMAIN_SEPARATOR = keccak256( _abi_encode( EIP712_TYPEHASH, NAME_HASH, VERSION_HASH, chain.id, self, salt, ) ) # ------------------------ Fire a transfer event ------------------------- log Transfer(empty(address), msg.sender, 0) # ------------------ Token transfers in and out of the AMM ------------------- @internal def _transfer_in( coin_idx: int128, dx: uint256, sender: address, expect_optimistic_transfer: bool, ) -> uint256: """ @notice Contains all logic to handle ERC20 token transfers. @param coin_idx Index of the coin to transfer in. @param dx amount of `_coin` to transfer into the pool. @param sender address to transfer `_coin` from. @param receiver address to transfer `_coin` to. @param expect_optimistic_transfer True if contract expects an optimistic coin transfer """ _dx: uint256 = ERC20(coins[coin_idx]).balanceOf(self) # ------------------------- Handle Transfers ----------------------------- if expect_optimistic_transfer: _dx = _dx - self.stored_balances[coin_idx] assert _dx >= dx else: assert dx > 0 # dev : do not transferFrom 0 tokens into the pool assert ERC20(coins[coin_idx]).transferFrom( sender, self, dx, default_return_value=True ) _dx = ERC20(coins[coin_idx]).balanceOf(self) - _dx # --------------------------- Store transferred in amount --------------------------- self.stored_balances[coin_idx] += _dx return _dx @internal def _transfer_out(_coin_idx: int128, _amount: uint256, receiver: address): """ @notice Transfer a single token from the pool to receiver. @dev This function is called by `remove_liquidity` and `remove_liquidity_one_coin`, `_exchange`, `_withdraw_admin_fees` and `remove_liquidity_imbalance` methods. @param _coin_idx Index of the token to transfer out @param _amount Amount of token to transfer out @param receiver Address to send the tokens to """ assert receiver != empty(address) # dev: do not send tokens to zero_address if not pool_contains_rebasing_tokens: # we need not cache balanceOf pool before swap out self.stored_balances[_coin_idx] -= _amount assert ERC20(coins[_coin_idx]).transfer( receiver, _amount, default_return_value=True ) else: # cache balances pre and post to account for fee on transfers etc. coin_balance: uint256 = ERC20(coins[_coin_idx]).balanceOf(self) assert ERC20(coins[_coin_idx]).transfer( receiver, _amount, default_return_value=True ) self.stored_balances[_coin_idx] = coin_balance - _amount # -------------------------- AMM Special Methods ----------------------------- @view @internal def _stored_rates() -> DynArray[uint256, MAX_COINS]: """ @notice Gets rate multipliers for each coin. @dev If the coin has a rate oracle that has been properly initialised, this method queries that rate by static-calling an external contract. """ rates: DynArray[uint256, MAX_COINS] = rate_multipliers for i in range(N_COINS_128, bound=MAX_COINS_128): if asset_types[i] == 1 and not rate_oracles[i] == 0: # NOTE: fetched_rate is assumed to be 1018 precision oracle_response: Bytes[32] = raw_call( convert(rate_oracles[i] % 2*160, address), _abi_encode(rate_oracles[i] & ORACLE_BIT_MASK), max_outsize=32, is_static_call=True, ) assert len(oracle_response) == 32 fetched_rate: uint256 = convert(oracle_response, uint256) rates[i] = unsafe_div(rates[i] fetched_rate, PRECISION) elif asset_types[i] == 3: # ERC4626 # fetched_rate: uint256 = ERC4626(coins[i]).convertToAssets(call_amount[i]) * scale_factor[i] # here: call_amount has ERC4626 precision, but the returned value is scaled up to 18 # using scale_factor which is (18 - n) if underlying asset has n decimals. rates[i] = unsafe_div( rates[i] * ERC4626(coins[i]).convertToAssets(call_amount[i]) * scale_factor[i], PRECISION ) # 1e18 precision return rates @view @internal def _balances() -> DynArray[uint256, MAX_COINS]: """ @notice Calculates the pool's balances _excluding_ the admin's balances. @dev If the pool contains rebasing tokens, this method ensures LPs keep all rebases and admin only claims swap fees. This also means that, since admin's balances are stored in an array and not inferred from read balances, the fees in the rebasing token that the admin collects is immune to slashing events. """ result: DynArray[uint256, MAX_COINS] = empty(DynArray[uint256, MAX_COINS]) balances_i: uint256 = 0 for i in range(N_COINS_128, bound=MAX_COINS_128): if pool_contains_rebasing_tokens: # Read balances by gulping to account for rebases balances_i = ERC20(coins[i]).balanceOf(self) - self.admin_balances[i] else: # Use cached balances balances_i = self.stored_balances[i] - self.admin_balances[i] result.append(balances_i) return result # -------------------------- AMM Main Functions ------------------------------ @external @nonreentrant('lock') def exchange( i: int128, j: int128, _dx: uint256, _min_dy: uint256, _receiver: address = msg.sender, ) -> uint256: """ @notice Perform an exchange between two coins @dev Index values can be found via the `coins` public getter method @param i Index value for the coin to send @param j Index value of the coin to receive @param _dx Amount of `i` being exchanged @param _min_dy Minimum amount of `j` to receive @param _receiver Address that receives `j` @return Actual amount of `j` received """ return self._exchange( msg.sender, i, j, _dx, _min_dy, _receiver, False ) @external @nonreentrant('lock') def exchange_received( i: int128, j: int128, _dx: uint256, _min_dy: uint256, _receiver: address = msg.sender, ) -> uint256: """ @notice Perform an exchange between two coins without transferring token in @dev The contract swaps tokens based on a change in balance of coin[i]. The dx = ERC20(coin[i]).balanceOf(self) - self.stored_balances[i]. Users of this method are dex aggregators, arbitrageurs, or other users who do not wish to grant approvals to the contract: they would instead send tokens directly to the contract and call `exchange_received`. Note: This is disabled if pool contains rebasing tokens. @param i Index value for the coin to send @param j Index value of the coin to receive @param _dx Amount of `i` being exchanged @param _min_dy Minimum amount of `j` to receive @param _receiver Address that receives `j` @return Actual amount of `j` received """ assert not pool_contains_rebasing_tokens # dev: exchange_received not supported if pool contains rebasing tokens return self._exchange( msg.sender, i, j, _dx, _min_dy, _receiver, True, # <--------------------------------------- swap optimistically. ) @external @nonreentrant('lock') def add_liquidity( _amounts: DynArray[uint256, MAX_COINS], _min_mint_amount: uint256, _receiver: address = msg.sender ) -> uint256: """ @notice Deposit coins into the pool @param _amounts List of amounts of coins to deposit @param _min_mint_amount Minimum amount of LP tokens to mint from the deposit @param _receiver Address that owns the minted LP tokens @return Amount of LP tokens received by depositing """ assert _receiver != empty(address) # dev: do not send LP tokens to zero_address amp: uint256 = self._A() old_balances: DynArray[uint256, MAX_COINS] = self._balances() rates: DynArray[uint256, MAX_COINS] = self._stored_rates() # Initial invariant D0: uint256 = self.get_D_mem(rates, old_balances, amp) total_supply: uint256 = self.total_supply new_balances: DynArray[uint256, MAX_COINS] = old_balances # -------------------------- Do Transfers In ----------------------------- for i in range(N_COINS_128, bound=MAX_COINS_128): if _amounts[i] > 0: new_balances[i] += self._transfer_in( i, _amounts[i], msg.sender, False, # expect_optimistic_transfer ) else: assert total_supply != 0 # dev: initial deposit requires all coins # ------------------------------------------------------------------------ # Invariant after change D1: uint256 = self.get_D_mem(rates, new_balances, amp) assert D1 > D0 # We need to recalculate the invariant accounting for fees # to calculate fair user's share fees: DynArray[uint256, MAX_COINS] = empty(DynArray[uint256, MAX_COINS]) mint_amount: uint256 = 0 if total_supply > 0: ideal_balance: uint256 = 0 difference: uint256 = 0 new_balance: uint256 = 0 ys: uint256 = unsafe_div(D0 + D1, N_COINS) xs: uint256 = 0 _dynamic_fee_i: uint256 = 0 # Only account for fees if we are not the first to deposit base_fee: uint256 = unsafe_div( unsafe_mul(self.fee, N_COINS), unsafe_mul(4, unsafe_sub(N_COINS, 1)) ) for i in range(N_COINS_128, bound=MAX_COINS_128): ideal_balance = D1 * old_balances[i] / D0 difference = 0 new_balance = new_balances[i] if ideal_balance > new_balance: difference = unsafe_sub(ideal_balance, new_balance) else: difference = unsafe_sub(new_balance, ideal_balance) # fee[i] = _dynamic_fee(i, j) * difference / FEE_DENOMINATOR xs = unsafe_div(rates[i] * (old_balances[i] + new_balance), PRECISION) _dynamic_fee_i = self._dynamic_fee(xs, ys, base_fee) fees.append(unsafe_div(_dynamic_fee_i * difference, FEE_DENOMINATOR)) self.admin_balances[i] += unsafe_div(fees[i] * admin_fee, FEE_DENOMINATOR) new_balances[i] -= fees[i] xp: DynArray[uint256, MAX_COINS] = self._xp_mem(rates, new_balances) D1 = self.get_D(xp, amp) # <--------------- Reuse D1 for new D value. mint_amount = unsafe_div(total_supply * (D1 - D0), D0) self.upkeep_oracles(xp, amp, D1) else: mint_amount = D1 # Take the dust if there was any # (re)instantiate D oracle if totalSupply is zero. self.last_D_packed = self.pack_2(D1, D1) # Update D ma time: ma_last_time_unpacked: uint256[2] = self.unpack_2(self.ma_last_time) if ma_last_time_unpacked[1] < block.timestamp: ma_last_time_unpacked[1] = block.timestamp self.ma_last_time = self.pack_2(ma_last_time_unpacked[0], ma_last_time_unpacked[1]) assert mint_amount >= _min_mint_amount, "Slippage screwed you" # Mint pool tokens total_supply += mint_amount self.balanceOf[_receiver] += mint_amount self.total_supply = total_supply log Transfer(empty(address), _receiver, mint_amount) log AddLiquidity(msg.sender, _amounts, fees, D1, total_supply) return mint_amount @external @nonreentrant('lock') def remove_liquidity_one_coin( _burn_amount: uint256, i: int128, _min_received: uint256, _receiver: address = msg.sender, ) -> uint256: """ @notice Withdraw a single coin from the pool @param _burn_amount Amount of LP tokens to burn in the withdrawal @param i Index value of the coin to withdraw @param _min_received Minimum amount of coin to receive @param _receiver Address that receives the withdrawn coins @return Amount of coin received """ assert _burn_amount > 0 # dev: do not remove 0 LP tokens dy: uint256 = 0 fee: uint256 = 0 xp: DynArray[uint256, MAX_COINS] = empty(DynArray[uint256, MAX_COINS]) amp: uint256 = empty(uint256) D: uint256 = empty(uint256) dy, fee, xp, amp, D = self._calc_withdraw_one_coin(_burn_amount, i) assert dy >= _min_received, "Not enough coins removed" self.admin_balances[i] += unsafe_div(fee * admin_fee, FEE_DENOMINATOR) self._burnFrom(msg.sender, _burn_amount) self._transfer_out(i, dy, _receiver) log RemoveLiquidityOne(msg.sender, i, _burn_amount, dy, self.total_supply) self.upkeep_oracles(xp, amp, D) return dy @external @nonreentrant('lock') def remove_liquidity_imbalance( _amounts: DynArray[uint256, MAX_COINS], _max_burn_amount: uint256, _receiver: address = msg.sender ) -> uint256: """ @notice Withdraw coins from the pool in an imbalanced amount @param _amounts List of amounts of underlying coins to withdraw @param _max_burn_amount Maximum amount of LP token to burn in the withdrawal @param _receiver Address that receives the withdrawn coins @return Actual amount of the LP token burned in the withdrawal """ amp: uint256 = self._A() rates: DynArray[uint256, MAX_COINS] = self._stored_rates() old_balances: DynArray[uint256, MAX_COINS] = self._balances() D0: uint256 = self.get_D_mem(rates, old_balances, amp) new_balances: DynArray[uint256, MAX_COINS] = old_balances for i in range(N_COINS_128, bound=MAX_COINS_128): if _amounts[i] != 0: new_balances[i] -= _amounts[i] self._transfer_out(i, _amounts[i], _receiver) D1: uint256 = self.get_D_mem(rates, new_balances, amp) base_fee: uint256 = unsafe_div( unsafe_mul(self.fee, N_COINS), unsafe_mul(4, unsafe_sub(N_COINS, 1)) ) ys: uint256 = unsafe_div((D0 + D1), N_COINS) fees: DynArray[uint256, MAX_COINS] = empty(DynArray[uint256, MAX_COINS]) dynamic_fee: uint256 = 0 xs: uint256 = 0 ideal_balance: uint256 = 0 difference: uint256 = 0 new_balance: uint256 = 0 for i in range(N_COINS_128, bound=MAX_COINS_128): ideal_balance = D1 * old_balances[i] / D0 difference = 0 new_balance = new_balances[i] if ideal_balance > new_balance: difference = unsafe_sub(ideal_balance, new_balance) else: difference = unsafe_sub(new_balance, ideal_balance) xs = unsafe_div(rates[i] * (old_balances[i] + new_balance), PRECISION) dynamic_fee = self._dynamic_fee(xs, ys, base_fee) fees.append(unsafe_div(dynamic_fee * difference, FEE_DENOMINATOR)) self.admin_balances[i] += unsafe_div(fees[i] * admin_fee, FEE_DENOMINATOR) new_balances[i] -= fees[i] D1 = self.get_D_mem(rates, new_balances, amp) # dev: reuse D1 for new D. self.upkeep_oracles(self._xp_mem(rates, new_balances), amp, D1) total_supply: uint256 = self.total_supply burn_amount: uint256 = unsafe_div((D0 - D1) * total_supply, D0) + 1 assert burn_amount > 1 # dev: zero tokens burned assert burn_amount <= _max_burn_amount, "Slippage screwed you" self._burnFrom(msg.sender, burn_amount) log RemoveLiquidityImbalance( msg.sender, _amounts, fees, D1, total_supply - burn_amount ) return burn_amount @external @nonreentrant('lock') def remove_liquidity( _burn_amount: uint256, _min_amounts: DynArray[uint256, MAX_COINS], _receiver: address = msg.sender, _claim_admin_fees: bool = True, ) -> DynArray[uint256, MAX_COINS]: """ @notice Withdraw coins from the pool @dev Withdrawal amounts are based on current deposit ratios @param _burn_amount Quantity of LP tokens to burn in the withdrawal @param _min_amounts Minimum amounts of underlying coins to receive @param _receiver Address that receives the withdrawn coins @return List of amounts of coins that were withdrawn """ total_supply: uint256 = self.total_supply assert _burn_amount > 0 # dev: invalid burn amount assert len(_min_amounts) == N_COINS # dev: invalid array length for _min_amounts amounts: DynArray[uint256, MAX_COINS] = empty(DynArray[uint256, MAX_COINS]) balances: DynArray[uint256, MAX_COINS] = self._balances() value: uint256 = 0 for i in range(N_COINS_128, bound=MAX_COINS_128): value = unsafe_div(balances[i] * _burn_amount, total_supply) assert value >= _min_amounts[i], "Withdrawal resulted in fewer coins than expected" amounts.append(value) self._transfer_out(i, value, _receiver) self._burnFrom(msg.sender, _burn_amount) # <---- Updates self.total_supply # --------------------------- Upkeep D_oracle ---------------------------- ma_last_time_unpacked: uint256[2] = self.unpack_2(self.ma_last_time) last_D_packed_current: uint256 = self.last_D_packed old_D: uint256 = last_D_packed_current & (2*128 - 1) self.last_D_packed = self.pack_2( old_D - unsafe_div(old_D _burn_amount, total_supply), # new_D = proportionally reduce D. self._calc_moving_average( last_D_packed_current, self.D_ma_time, ma_last_time_unpacked[1] ) ) if ma_last_time_unpacked[1] < block.timestamp: ma_last_time_unpacked[1] = block.timestamp self.ma_last_time = self.pack_2(ma_last_time_unpacked[0], ma_last_time_unpacked[1]) # ------------------------------- Log event ------------------------------ log RemoveLiquidity( msg.sender, amounts, empty(DynArray[uint256, MAX_COINS]), unsafe_sub(total_supply, _burn_amount) ) # ------- Withdraw admin fees if _claim_admin_fees is set to True -------- if _claim_admin_fees: self._withdraw_admin_fees() return amounts @external @nonreentrant('lock') def withdraw_admin_fees(): """ @notice Claim admin fees. Callable by anyone. """ self._withdraw_admin_fees() # ------------------------ AMM Internal Functions ---------------------------- @view @internal def _dynamic_fee(xpi: uint256, xpj: uint256, _fee: uint256) -> uint256: _offpeg_fee_multiplier: uint256 = self.offpeg_fee_multiplier if _offpeg_fee_multiplier <= FEE_DENOMINATOR: return _fee xps2: uint256 = (xpi + xpj) ** 2 return unsafe_div( unsafe_mul(_offpeg_fee_multiplier, _fee), unsafe_add( unsafe_sub(_offpeg_fee_multiplier, FEE_DENOMINATOR) * 4 * xpi * xpj / xps2, FEE_DENOMINATOR ) ) @internal def __exchange( x: uint256, _xp: DynArray[uint256, MAX_COINS], rates: DynArray[uint256, MAX_COINS], i: int128, j: int128, ) -> uint256: amp: uint256 = self._A() D: uint256 = self.get_D(_xp, amp) y: uint256 = self.get_y(i, j, x, _xp, amp, D) dy: uint256 = _xp[j] - y - 1 # -1 just in case there were some rounding errors dy_fee: uint256 = unsafe_div( dy * self._dynamic_fee( unsafe_div(_xp[i] + x, 2), unsafe_div(_xp[j] + y, 2), self.fee ), FEE_DENOMINATOR ) # Convert all to real units dy = (dy - dy_fee) * PRECISION / rates[j] self.admin_balances[j] += unsafe_div( unsafe_div(dy_fee * admin_fee, FEE_DENOMINATOR) * PRECISION, rates[j] ) # Calculate and store state prices: xp: DynArray[uint256, MAX_COINS] = _xp xp[i] = x xp[j] = y # D is not changed because we did not apply a fee self.upkeep_oracles(xp, amp, D) return dy @internal def _exchange( sender: address, i: int128, j: int128, _dx: uint256, _min_dy: uint256, receiver: address, expect_optimistic_transfer: bool ) -> uint256: assert i != j # dev: coin index out of range assert _dx > 0 # dev: do not exchange 0 coins rates: DynArray[uint256, MAX_COINS] = self._stored_rates() old_balances: DynArray[uint256, MAX_COINS] = self._balances() xp: DynArray[uint256, MAX_COINS] = self._xp_mem(rates, old_balances) # --------------------------- Do Transfer in ----------------------------- # `dx` is whatever the pool received after ERC20 transfer: dx: uint256 = self._transfer_in( i, _dx, sender, expect_optimistic_transfer ) # ------------------------------- Exchange ------------------------------- x: uint256 = xp[i] + unsafe_div(dx * rates[i], PRECISION) dy: uint256 = self.__exchange(x, xp, rates, i, j) assert dy >= _min_dy, "Exchange resulted in fewer coins than expected" # --------------------------- Do Transfer out ---------------------------- self._transfer_out(j, dy, receiver) # ------------------------------------------------------------------------ log TokenExchange(msg.sender, i, dx, j, dy) return dy @internal def _withdraw_admin_fees(): fee_receiver: address = factory.fee_receiver() if fee_receiver == empty(address): return # Do nothing. admin_balances: DynArray[uint256, MAX_COINS] = self.admin_balances for i in range(N_COINS_128, bound=MAX_COINS_128): if admin_balances[i] > 0: self._transfer_out(i, admin_balances[i], fee_receiver) admin_balances[i] = 0 self.admin_balances = admin_balances # --------------------------- AMM Math Functions ----------------------------- @view @internal def get_y( i: int128, j: int128, x: uint256, xp: DynArray[uint256, MAX_COINS], _amp: uint256, _D: uint256 ) -> uint256: """ Calculate x[j] if one makes x[i] = x Done by solving quadratic equation iteratively. x_1*2 + x_1 (sum' - (Ann - 1) D / (A * nn)) = D (n + 1) / (n ** (2 * n) * prod' * A) x_1*2 + bx_1 = c x_1 = (x_1*2 + c) / (2x_1 + b) """ # x in the input is converted to the same price/precision assert i != j # dev: same coin assert j >= 0 # dev: j below zero assert j < N_COINS_128 # dev: j above N_COINS # should be unreachable, but good for safety assert i >= 0 assert i < N_COINS_128 amp: uint256 = _amp D: uint256 = _D S_: uint256 = 0 _x: uint256 = 0 y_prev: uint256 = 0 c: uint256 = D Ann: uint256 = amp * N_COINS for _i in range(MAX_COINS_128): if _i == N_COINS_128: break if _i == i: _x = x elif _i != j: _x = xp[_i] else: continue S_ += _x c = c * D / (_x * N_COINS) c = c * D * A_PRECISION / (Ann * N_COINS) b: uint256 = S_ + D * A_PRECISION / Ann # - D y: uint256 = D for _i in range(255): y_prev = y y = (yy + c) / (2 y + b - D) # Equality with the precision of 1 if y > y_prev: if y - y_prev <= 1: return y else: if y_prev - y <= 1: return y raise @pure @internal def get_D(_xp: DynArray[uint256, MAX_COINS], _amp: uint256) -> uint256: """ D invariant calculation in non-overflowing integer operations iteratively A * sum(x_i) * n*n + D = A D * nn + D(n+1) / (n*n prod(x_i)) Converging solution: D[j+1] = (A * n*n sum(x_i) - D[j](n+1) / (nn prod(x_i))) / (A * n*n - 1) """ S: uint256 = 0 for x in _xp: S += x if S == 0: return 0 D: uint256 = S Ann: uint256 = _amp N_COINS for i in range(255): D_P: uint256 = D for x in _xp: D_P = D_P * D / x D_P /= pow_mod256(N_COINS, N_COINS) Dprev: uint256 = D # (Ann * S / A_PRECISION + D_P * N_COINS) * D / ((Ann - A_PRECISION) * D / A_PRECISION + (N_COINS + 1) * D_P) D = ( (unsafe_div(Ann * S, A_PRECISION) + D_P * N_COINS) * D / ( unsafe_div((Ann - A_PRECISION) * D, A_PRECISION) + unsafe_add(N_COINS, 1) * D_P ) ) # Equality with the precision of 1 if D > Dprev: if D - Dprev <= 1: return D else: if Dprev - D <= 1: return D # convergence typically occurs in 4 rounds or less, this should be unreachable! # if it does happen the pool is borked and LPs can withdraw via `remove_liquidity` raise @pure @internal def get_y_D( A: uint256, i: int128, xp: DynArray[uint256, MAX_COINS], D: uint256 ) -> uint256: """ Calculate x[i] if one reduces D from being calculated for xp to D Done by solving quadratic equation iteratively. x_1*2 + x_1 (sum' - (Ann - 1) D / (A * nn)) = D (n + 1) / (n ** (2 * n) * prod' * A) x_1*2 + bx_1 = c x_1 = (x_1*2 + c) / (2x_1 + b) """ # x in the input is converted to the same price/precision assert i >= 0 # dev: i below zero assert i < N_COINS_128 # dev: i above N_COINS S_: uint256 = 0 _x: uint256 = 0 y_prev: uint256 = 0 c: uint256 = D Ann: uint256 = A * N_COINS for _i in range(MAX_COINS_128): if _i == N_COINS_128: break if _i != i: _x = xp[_i] else: continue S_ += _x c = c * D / (_x * N_COINS) c = c * D * A_PRECISION / (Ann * N_COINS) b: uint256 = S_ + D * A_PRECISION / Ann y: uint256 = D for _i in range(255): y_prev = y y = (yy + c) / (2 y + b - D) # Equality with the precision of 1 if y > y_prev: if y - y_prev <= 1: return y else: if y_prev - y <= 1: return y raise @view @internal def _A() -> uint256: """ Handle ramping A up or down """ t1: uint256 = self.future_A_time A1: uint256 = self.future_A if block.timestamp < t1: A0: uint256 = self.initial_A t0: uint256 = self.initial_A_time # Expressions in uint256 cannot have negative numbers, thus "if" if A1 > A0: return A0 + unsafe_sub(A1, A0) * (block.timestamp - t0) / (t1 - t0) else: return A0 - unsafe_sub(A0, A1) * (block.timestamp - t0) / (t1 - t0) else: # when t1 == 0 or block.timestamp >= t1 return A1 @pure @internal def _xp_mem( _rates: DynArray[uint256, MAX_COINS], _balances: DynArray[uint256, MAX_COINS] ) -> DynArray[uint256, MAX_COINS]: result: DynArray[uint256, MAX_COINS] = empty(DynArray[uint256, MAX_COINS]) for i in range(N_COINS_128, bound=MAX_COINS_128): result.append(unsafe_div(_rates[i] * _balances[i], PRECISION)) return result @view @internal def get_D_mem( _rates: DynArray[uint256, MAX_COINS], _balances: DynArray[uint256, MAX_COINS], _amp: uint256 ) -> uint256: xp: DynArray[uint256, MAX_COINS] = self._xp_mem(_rates, _balances) return self.get_D(xp, _amp) @view @internal def _calc_withdraw_one_coin( _burn_amount: uint256, i: int128 ) -> ( uint256, uint256, DynArray[uint256, MAX_COINS], uint256, uint256 ): # First, need to calculate # * Get current D # * Solve Eqn against y_i for D - _token_amount amp: uint256 = self._A() rates: DynArray[uint256, MAX_COINS] = self._stored_rates() xp: DynArray[uint256, MAX_COINS] = self._xp_mem(rates, self._balances()) D0: uint256 = self.get_D(xp, amp) total_supply: uint256 = self.total_supply D1: uint256 = D0 - _burn_amount * D0 / total_supply new_y: uint256 = self.get_y_D(amp, i, xp, D1) base_fee: uint256 = unsafe_div( unsafe_mul(self.fee, N_COINS), unsafe_mul(4, unsafe_sub(N_COINS, 1)) ) xp_reduced: DynArray[uint256, MAX_COINS] = xp ys: uint256 = unsafe_div((D0 + D1), unsafe_mul(2, N_COINS)) dx_expected: uint256 = 0 xp_j: uint256 = 0 xavg: uint256 = 0 dynamic_fee: uint256 = 0 for j in range(MAX_COINS_128): if j == N_COINS_128: break dx_expected = 0 xp_j = xp[j] if j == i: dx_expected = xp_j * D1 / D0 - new_y xavg = unsafe_div((xp_j + new_y), 2) else: dx_expected = xp_j - xp_j * D1 / D0 xavg = xp_j dynamic_fee = self._dynamic_fee(xavg, ys, base_fee) xp_reduced[j] = xp_j - unsafe_div(dynamic_fee * dx_expected, FEE_DENOMINATOR) dy: uint256 = xp_reduced[i] - self.get_y_D(amp, i, xp_reduced, D1) dy_0: uint256 = (xp[i] - new_y) * PRECISION / rates[i] # w/o fees dy = unsafe_div((dy - 1) * PRECISION, rates[i]) # Withdraw less to account for rounding errors # update xp with new_y for p calculations. xp[i] = new_y return dy, dy_0 - dy, xp, amp, D1 # -------------------------- AMM Price Methods ------------------------------- @pure @internal def pack_2(p1: uint256, p2: uint256) -> uint256: assert p1 < 2128 assert p2 < 2128 return p1 \| (p2 << 128) @pure @internal def unpack_2(packed: uint256) -> uint256[2]: return [packed & (2*128 - 1), packed >> 128] @internal @pure def _get_p( xp: DynArray[uint256, MAX_COINS], amp: uint256, D: uint256, ) -> DynArray[uint256, MAX_COINS]: # dx_0 / dx_1 only, however can have any number of coins in pool ANN: uint256 = unsafe_mul(amp, N_COINS) Dr: uint256 = unsafe_div(D, pow_mod256(N_COINS, N_COINS)) for i in range(N_COINS_128, bound=MAX_COINS_128): Dr = Dr D / xp[i] p: DynArray[uint256, MAX_COINS] = empty(DynArray[uint256, MAX_COINS]) xp0_A: uint256 = unsafe_div(ANN * xp[0], A_PRECISION) for i in range(1, MAX_COINS): if i == N_COINS: break p.append(10*18 (xp0_A + unsafe_div(Dr * xp[0], xp[i])) / (xp0_A + Dr)) return p @internal def upkeep_oracles(xp: DynArray[uint256, MAX_COINS], amp: uint256, D: uint256): """ @notice Upkeeps price and D oracles. """ ma_last_time_unpacked: uint256[2] = self.unpack_2(self.ma_last_time) last_prices_packed_current: DynArray[uint256, MAX_COINS] = self.last_prices_packed last_prices_packed_new: DynArray[uint256, MAX_COINS] = last_prices_packed_current spot_price: DynArray[uint256, MAX_COINS] = self._get_p(xp, amp, D) # -------------------------- Upkeep price oracle ------------------------- for i in range(MAX_COINS): if i == N_COINS - 1: break if spot_price[i] != 0: # Update packed prices ----------------- last_prices_packed_new[i] = self.pack_2( min(spot_price[i], 2 * 1018), # <----- Cap spot value by 2. self._calc_moving_average( last_prices_packed_current[i], self.ma_exp_time, ma_last_time_unpacked[0], # index 0 is ma_last_time for prices ) ) self.last_prices_packed = last_prices_packed_new # ---------------------------- Upkeep D oracle --------------------------- last_D_packed_current: uint256 = self.last_D_packed self.last_D_packed = self.pack_2( D, self._calc_moving_average( last_D_packed_current, self.D_ma_time, ma_last_time_unpacked[1], # index 1 is ma_last_time for D ) ) # Housekeeping: Update ma_last_time for p and D oracles ------------------ for i in range(2): if ma_last_time_unpacked[i] < block.timestamp: ma_last_time_unpacked[i] = block.timestamp self.ma_last_time = self.pack_2(ma_last_time_unpacked[0], ma_last_time_unpacked[1]) @internal @view def _calc_moving_average( packed_value: uint256, averaging_window: uint256, ma_last_time: uint256 ) -> uint256: last_spot_value: uint256 = packed_value & (2128 - 1) last_ema_value: uint256 = (packed_value >> 128) if ma_last_time < block.timestamp: # calculate new_ema_value and return that. alpha: uint256 = self.exp( -convert( unsafe_div(unsafe_mul(unsafe_sub(block.timestamp, ma_last_time), 10*18), averaging_window), int256 ) ) return unsafe_div(last_spot_value (10*18 - alpha) + last_ema_value alpha, 1018) return last_ema_value @view @external def last_price(i: uint256) -> uint256: return self.last_prices_packed[i] & (2128 - 1) @view @external def ema_price(i: uint256) -> uint256: return (self.last_prices_packed[i] >> 128) @external @view def get_p(i: uint256) -> uint256: """ @notice Returns the AMM State price of token @dev if i = 0, it will return the state price of coin[1]. @param i index of state price (0 for coin[1], 1 for coin[2], ...) @return uint256 The state price quoted by the AMM for coin[i+1] """ amp: uint256 = self._A() xp: DynArray[uint256, MAX_COINS] = self._xp_mem( self._stored_rates(), self._balances() ) D: uint256 = self.get_D(xp, amp) return self._get_p(xp, amp, D)[i] @external @view @nonreentrant('lock') def price_oracle(i: uint256) -> uint256: return self._calc_moving_average( self.last_prices_packed[i], self.ma_exp_time, self.ma_last_time & (2*128 - 1) ) @external @view @nonreentrant('lock') def D_oracle() -> uint256: return self._calc_moving_average( self.last_D_packed, self.D_ma_time, self.ma_last_time >> 128 ) # ----------------------------- Math Utils ----------------------------------- @internal @pure def exp(x: int256) -> uint256: """ @dev Calculates the natural exponential function of a signed integer with a precision of 1e18. @notice Note that this function consumes about 810 gas units. The implementation is inspired by Remco Bloemen's implementation under the MIT license here: https://xn--2-umb.com/22/exp-ln. @dev This implementation is derived from Snekmate, which is authored by pcaversaccio (Snekmate), distributed under the AGPL-3.0 license. https://github.com/pcaversaccio/snekmate @param x The 32-byte variable. @return int256 The 32-byte calculation result. """ value: int256 = x # If the result is `< 0.5`, we return zero. This happens when we have the following: # "x <= floor(log(0.5e18) 1e18) ~ -42e18". if (x <= -41446531673892822313): return empty(uint256) # When the result is "> (2 255 - 1) / 1e18" we cannot represent it as a signed integer. # This happens when "x >= floor(log((2 255 - 1) / 1e18) * 1e18) ~ 135". assert x < 135305999368893231589, "wad_exp overflow" # `x` is now in the range "(-42, 136) * 1e18". Convert to "(-42, 136) * 2 96" for higher # intermediate precision and a binary base. This base conversion is a multiplication with # "1e18 / 2 96 = 5 18 / 2 78". value = unsafe_div(x << 78, 5 ** 18) # Reduce the range of `x` to "(-½ ln 2, ½ ln 2) * 2 ** 96" by factoring out powers of two # so that "exp(x) = exp(x') * 2 ** k", where `k` is a signer integer. Solving this gives # "k = round(x / log(2))" and "x' = x - k * log(2)". Thus, `k` is in the range "[-61, 195]". k: int256 = unsafe_add(unsafe_div(value << 96, 54916777467707473351141471128), 2 95) >> 96 value = unsafe_sub(value, unsafe_mul(k, 54916777467707473351141471128)) # Evaluate using a "(6, 7)"-term rational approximation. Since `p` is monic, # we will multiply by a scaling factor later. y: int256 = unsafe_add(unsafe_mul(unsafe_add(value, 1346386616545796478920950773328), value) >> 96, 57155421227552351082224309758442) p: int256 = unsafe_add(unsafe_mul(unsafe_add(unsafe_mul(unsafe_sub(unsafe_add(y, value), 94201549194550492254356042504812), y) >> 96,\ 28719021644029726153956944680412240), value), 4385272521454847904659076985693276 << 96) # We leave `p` in the "2 192" base so that we do not have to scale it up # again for the division. q: int256 = unsafe_add(unsafe_mul(unsafe_sub(value, 2855989394907223263936484059900), value) >> 96, 50020603652535783019961831881945) q = unsafe_sub(unsafe_mul(q, value) >> 96, 533845033583426703283633433725380) q = unsafe_add(unsafe_mul(q, value) >> 96, 3604857256930695427073651918091429) q = unsafe_sub(unsafe_mul(q, value) >> 96, 14423608567350463180887372962807573) q = unsafe_add(unsafe_mul(q, value) >> 96, 26449188498355588339934803723976023) # The polynomial `q` has no zeros in the range because all its roots are complex. # No scaling is required, as `p` is already "2 ** 96" too large. Also, # `r` is in the range "(0.09, 0.25) * 296" after the division. r: int256 = unsafe_div(p, q) # To finalise the calculation, we have to multiply `r` by: # - the scale factor "s = ~6.031367120", # - the factor "2 k" from the range reduction, and # - the factor "1e18 / 2 96" for the base conversion. # We do this all at once, with an intermediate result in "2213" base, # so that the final right shift always gives a positive value. # Note that to circumvent Vyper's safecast feature for the potentially # negative parameter value `r`, we first convert `r` to `bytes32` and # subsequently to `uint256`. Remember that the EVM default behaviour is # to use two's complement representation to handle signed integers. return unsafe_mul(convert(convert(r, bytes32), uint256), 3822833074963236453042738258902158003155416615667) >> convert(unsafe_sub(195, k), uint256) # ---------------------------- ERC20 Utils ----------------------------------- @view @internal def _domain_separator() -> bytes32: if chain.id != CACHED_CHAIN_ID: return keccak256( _abi_encode( EIP712_TYPEHASH, NAME_HASH, VERSION_HASH, chain.id, self, salt, ) ) return CACHED_DOMAIN_SEPARATOR @internal def _transfer(_from: address, _to: address, _value: uint256): # # NOTE: vyper does not allow underflows # # so the following subtraction would revert on insufficient balance self.balanceOf[_from] -= _value self.balanceOf[_to] += _value log Transfer(_from, _to, _value) @internal def _burnFrom(_from: address, _burn_amount: uint256): self.total_supply -= _burn_amount self.balanceOf[_from] -= _burn_amount log Transfer(_from, empty(address), _burn_amount) @external def transfer(_to : address, _value : uint256) -> bool: """ @dev Transfer token for a specified address @param _to The address to transfer to. @param _value The amount to be transferred. """ self._transfer(msg.sender, _to, _value) return True @external def transferFrom(_from : address, _to : address, _value : uint256) -> bool: """ @dev Transfer tokens from one address to another. @param _from address The address which you want to send tokens from @param _to address The address which you want to transfer to @param _value uint256 the amount of tokens to be transferred """ self._transfer(_from, _to, _value) _allowance: uint256 = self.allowance[_from][msg.sender] if _allowance != max_value(uint256): _new_allowance: uint256 = _allowance - _value self.allowance[_from][msg.sender] = _new_allowance log Approval(_from, msg.sender, _new_allowance) return True @external def approve(_spender : address, _value : uint256) -> bool: """ @notice Approve the passed address to transfer the specified amount of tokens on behalf of msg.sender @dev Beware that changing an allowance via this method brings the risk that someone may use both the old and new allowance by unfortunate transaction ordering: https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 @param _spender The address which will transfer the funds @param _value The amount of tokens that may be transferred @return bool success """ self.allowance[msg.sender][_spender] = _value log Approval(msg.sender, _spender, _value) return True @external def permit( _owner: address, _spender: address, _value: uint256, _deadline: uint256, _v: uint8, _r: bytes32, _s: bytes32 ) -> bool: """ @notice Approves spender by owner's signature to expend owner's tokens. See https://eips.ethereum.org/EIPS/eip-2612. @dev Inspired by https://github.com/yearn/yearn-vaults/blob/main/contracts/Vault.vy#L753-L793 @dev Supports smart contract wallets which implement ERC1271 https://eips.ethereum.org/EIPS/eip-1271 @param _owner The address which is a source of funds and has signed the Permit. @param _spender The address which is allowed to spend the funds. @param _value The amount of tokens to be spent. @param _deadline The timestamp after which the Permit is no longer valid. @param _v The bytes[64] of the valid secp256k1 signature of permit by owner @param _r The bytes[0:32] of the valid secp256k1 signature of permit by owner @param _s The bytes[32:64] of the valid secp256k1 signature of permit by owner @return True, if transaction completes successfully """ assert _owner != empty(address) assert block.timestamp <= _deadline nonce: uint256 = self.nonces[_owner] digest: bytes32 = keccak256( concat( b"\x19\x01", self._domain_separator(), keccak256(_abi_encode(EIP2612_TYPEHASH, _owner, _spender, _value, nonce, _deadline)) ) ) if _owner.is_contract: sig: Bytes[65] = concat(_abi_encode(_r, _s), slice(convert(_v, bytes32), 31, 1)) # reentrancy not a concern since this is a staticcall assert ERC1271(_owner).isValidSignature(digest, sig) == ERC1271_MAGIC_VAL else: assert ecrecover(digest, convert(_v, uint256), convert(_r, uint256), convert(_s, uint256)) == _owner self.allowance[_owner][_spender] = _value self.nonces[_owner] = unsafe_add(nonce, 1) log Approval(_owner, _spender, _value) return True @view @external def DOMAIN_SEPARATOR() -> bytes32: """ @notice EIP712 domain separator. @return bytes32 Domain Separator set for the current chain. """ return self._domain_separator() # ------------------------- AMM View Functions ------------------------------- @view @external def get_dx(i: int128, j: int128, dy: uint256) -> uint256: """ @notice Calculate the current input dx given output dy @dev Index values can be found via the `coins` public getter method @param i Index value for the coin to send @param j Index value of the coin to receive @param dy Amount of `j` being received after exchange @return Amount of `i` predicted """ return StableSwapViews(factory.views_implementation()).get_dx(i, j, dy, self) @view @external def get_dy(i: int128, j: int128, dx: uint256) -> uint256: """ @notice Calculate the current output dy given input dx @dev Index values can be found via the `coins` public getter method @param i Index value for the coin to send @param j Index value of the coin to receive @param dx Amount of `i` being exchanged @return Amount of `j` predicted """ return StableSwapViews(factory.views_implementation()).get_dy(i, j, dx, self) @view @external def calc_withdraw_one_coin(_burn_amount: uint256, i: int128) -> uint256: """ @notice Calculate the amount received when withdrawing a single coin @param _burn_amount Amount of LP tokens to burn in the withdrawal @param i Index value of the coin to withdraw @return Amount of coin received """ return self._calc_withdraw_one_coin(_burn_amount, i)[0] @view @external @nonreentrant('lock') def totalSupply() -> uint256: """ @notice The total supply of pool LP tokens @return self.total_supply, 18 decimals. """ return self.total_supply @view @external @nonreentrant('lock') def get_virtual_price() -> uint256: """ @notice The current virtual price of the pool LP token @dev Useful for calculating profits. The method may be vulnerable to donation-style attacks if implementation contains rebasing tokens. For integrators, caution is advised. @return LP token virtual price normalized to 1e18 """ amp: uint256 = self._A() xp: DynArray[uint256, MAX_COINS] = self._xp_mem( self._stored_rates(), self._balances() ) D: uint256 = self.get_D(xp, amp) # D is in the units similar to DAI (e.g. converted to precision 1e18) # When balanced, D = n * x_u - total virtual value of the portfolio return D * PRECISION / self.total_supply @view @external def calc_token_amount( _amounts: DynArray[uint256, MAX_COINS], _is_deposit: bool ) -> uint256: """ @notice Calculate addition or reduction in token supply from a deposit or withdrawal @param _amounts Amount of each coin being deposited @param _is_deposit set True for deposits, False for withdrawals @return Expected amount of LP tokens received """ return StableSwapViews(factory.views_implementation()).calc_token_amount(_amounts, _is_deposit, self) @view @external def A() -> uint256: return unsafe_div(self._A(), A_PRECISION) @view @external def A_precise() -> uint256: return self._A() @view @external def balances(i: uint256) -> uint256: """ @notice Get the current balance of a coin within the pool, less the accrued admin fees @param i Index value for the coin to query balance of @return Token balance """ return self._balances()[i] @view @external def get_balances() -> DynArray[uint256, MAX_COINS]: return self._balances() @view @external def stored_rates() -> DynArray[uint256, MAX_COINS]: return self._stored_rates() @view @external def dynamic_fee(i: int128, j: int128) -> uint256: """ @notice Return the fee for swapping between `i` and `j` @param i Index value for the coin to send @param j Index value of the coin to receive @return Swap fee expressed as an integer with 1e10 precision """ return StableSwapViews(factory.views_implementation()).dynamic_fee(i, j, self) # --------------------------- AMM Admin Functions ---------------------------- @external def ramp_A(_future_A: uint256, _future_time: uint256): assert msg.sender == factory.admin() # dev: only owner assert block.timestamp >= self.initial_A_time + MIN_RAMP_TIME assert _future_time >= block.timestamp + MIN_RAMP_TIME # dev: insufficient time _initial_A: uint256 = self._A() _future_A_p: uint256 = _future_A * A_PRECISION assert _future_A > 0 and _future_A < MAX_A if _future_A_p < _initial_A: assert _future_A_p * MAX_A_CHANGE >= _initial_A else: assert _future_A_p <= _initial_A * MAX_A_CHANGE self.initial_A = _initial_A self.future_A = _future_A_p self.initial_A_time = block.timestamp self.future_A_time = _future_time log RampA(_initial_A, _future_A_p, block.timestamp, _future_time) @external def stop_ramp_A(): assert msg.sender == factory.admin() # dev: only owner current_A: uint256 = self._A() self.initial_A = current_A self.future_A = current_A self.initial_A_time = block.timestamp self.future_A_time = block.timestamp # now (block.timestamp < t1) is always False, so we return saved A log StopRampA(current_A, block.timestamp) @external def set_new_fee(_new_fee: uint256, _new_offpeg_fee_multiplier: uint256): assert msg.sender == factory.admin() # set new fee: assert _new_fee <= MAX_FEE self.fee = _new_fee # set new offpeg_fee_multiplier: assert _new_offpeg_fee_multiplier * _new_fee <= MAX_FEE * FEE_DENOMINATOR # dev: offpeg multiplier exceeds maximum self.offpeg_fee_multiplier = _new_offpeg_fee_multiplier log ApplyNewFee(_new_fee, _new_offpeg_fee_multiplier) @external def set_ma_exp_time(_ma_exp_time: uint256, _D_ma_time: uint256): """ @notice Set the moving average window of the price oracles. @param _ma_exp_time Moving average window for the price oracle. It is time_in_seconds / ln(2). @param _D_ma_time Moving average window for the D oracle. It is time_in_seconds / ln(2). """ assert msg.sender == factory.admin() # dev: only owner assert unsafe_mul(_ma_exp_time, _D_ma_time) > 0 # dev: 0 in input values self.ma_exp_time = _ma_exp_time self.D_ma_time = _D_ma_time log SetNewMATime(_ma_exp_time, _D_ma_time)
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1	19,493,185	0afca549ca07d996d473b4bfe69ff795bd2753e500d6f26ddb42c2bd51f6416e	fa6756672c83fff1d5ef18a42477343b95cc2e6c1f02b8edf5ea33c67c8ffc46	ea1ebdcc6b73df5f89e995c182f3a51c77ae5ef0	a6b71e26c5e0845f74c812102ca7114b6a896ab2	33baefaabf690c79449c82ce460482a8a907ebc8	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	608060405273ffffffffffffffffffffffffffffffffffffffff600054167fa619486e0000000000000000000000000000000000000000000000000000000060003514156050578060005260206000f35b3660008037600080366000845af43d6000803e60008114156070573d6000fd5b3d6000f3fea2646970667358221220d1429297349653a4918076d650332de1a1068c5f3e07c5c82360c277770b955264736f6c63430007060033	// SPDX-License-Identifier: LGPL-3.0-only pragma solidity >=0.7.0 <0.9.0; /// @title IProxy - Helper interface to access masterCopy of the Proxy on-chain /// @author Richard Meissner - <[email protected]> interface IProxy { function masterCopy() external view returns (address); } /// @title GnosisSafeProxy - Generic proxy contract allows to execute all transactions applying the code of a master contract. /// @author Stefan George - <[email protected]> /// @author Richard Meissner - <[email protected]> contract GnosisSafeProxy { // singleton always needs to be first declared variable, to ensure that it is at the same location in the contracts to which calls are delegated. // To reduce deployment costs this variable is internal and needs to be retrieved via `getStorageAt` address internal singleton; /// @dev Constructor function sets address of singleton contract. /// @param _singleton Singleton address. constructor(address _singleton) { require(_singleton != address(0), "Invalid singleton address provided"); singleton = _singleton; } /// @dev Fallback function forwards all transactions and returns all received return data. fallback() external payable { // solhint-disable-next-line no-inline-assembly assembly { let _singleton := and(sload(0), 0xffffffffffffffffffffffffffffffffffffffff) // 0xa619486e == keccak("masterCopy()"). The value is right padded to 32-bytes with 0s if eq(calldataload(0), 0xa619486e00000000000000000000000000000000000000000000000000000000) { mstore(0, _singleton) return(0, 0x20) } calldatacopy(0, 0, calldatasize()) let success := delegatecall(gas(), _singleton, 0, calldatasize(), 0, 0) returndatacopy(0, 0, returndatasize()) if eq(success, 0) { revert(0, returndatasize()) } return(0, returndatasize()) } } } /// @title Proxy Factory - Allows to create new proxy contact and execute a message call to the new proxy within one transaction. /// @author Stefan George - <[email protected]> contract GnosisSafeProxyFactory { event ProxyCreation(GnosisSafeProxy proxy, address singleton); /// @dev Allows to create new proxy contact and execute a message call to the new proxy within one transaction. /// @param singleton Address of singleton contract. /// @param data Payload for message call sent to new proxy contract. function createProxy(address singleton, bytes memory data) public returns (GnosisSafeProxy proxy) { proxy = new GnosisSafeProxy(singleton); if (data.length > 0) // solhint-disable-next-line no-inline-assembly assembly { if eq(call(gas(), proxy, 0, add(data, 0x20), mload(data), 0, 0), 0) { revert(0, 0) } } emit ProxyCreation(proxy, singleton); } /// @dev Allows to retrieve the runtime code of a deployed Proxy. This can be used to check that the expected Proxy was deployed. function proxyRuntimeCode() public pure returns (bytes memory) { return type(GnosisSafeProxy).runtimeCode; } /// @dev Allows to retrieve the creation code used for the Proxy deployment. With this it is easily possible to calculate predicted address. function proxyCreationCode() public pure returns (bytes memory) { return type(GnosisSafeProxy).creationCode; } /// @dev Allows to create new proxy contact using CREATE2 but it doesn't run the initializer. /// This method is only meant as an utility to be called from other methods /// @param _singleton Address of singleton contract. /// @param initializer Payload for message call sent to new proxy contract. /// @param saltNonce Nonce that will be used to generate the salt to calculate the address of the new proxy contract. function deployProxyWithNonce( address _singleton, bytes memory initializer, uint256 saltNonce ) internal returns (GnosisSafeProxy proxy) { // If the initializer changes the proxy address should change too. Hashing the initializer data is cheaper than just concatinating it bytes32 salt = keccak256(abi.encodePacked(keccak256(initializer), saltNonce)); bytes memory deploymentData = abi.encodePacked(type(GnosisSafeProxy).creationCode, uint256(uint160(_singleton))); // solhint-disable-next-line no-inline-assembly assembly { proxy := create2(0x0, add(0x20, deploymentData), mload(deploymentData), salt) } require(address(proxy) != address(0), "Create2 call failed"); } /// @dev Allows to create new proxy contact and execute a message call to the new proxy within one transaction. /// @param _singleton Address of singleton contract. /// @param initializer Payload for message call sent to new proxy contract. /// @param saltNonce Nonce that will be used to generate the salt to calculate the address of the new proxy contract. function createProxyWithNonce( address _singleton, bytes memory initializer, uint256 saltNonce ) public returns (GnosisSafeProxy proxy) { proxy = deployProxyWithNonce(_singleton, initializer, saltNonce); if (initializer.length > 0) // solhint-disable-next-line no-inline-assembly assembly { if eq(call(gas(), proxy, 0, add(initializer, 0x20), mload(initializer), 0, 0), 0) { revert(0, 0) } } emit ProxyCreation(proxy, _singleton); } /// @dev Allows to create new proxy contact, execute a message call to the new proxy and call a specified callback within one transaction /// @param _singleton Address of singleton contract. /// @param initializer Payload for message call sent to new proxy contract. /// @param saltNonce Nonce that will be used to generate the salt to calculate the address of the new proxy contract. /// @param callback Callback that will be invoced after the new proxy contract has been successfully deployed and initialized. function createProxyWithCallback( address _singleton, bytes memory initializer, uint256 saltNonce, IProxyCreationCallback callback ) public returns (GnosisSafeProxy proxy) { uint256 saltNonceWithCallback = uint256(keccak256(abi.encodePacked(saltNonce, callback))); proxy = createProxyWithNonce(_singleton, initializer, saltNonceWithCallback); if (address(callback) != address(0)) callback.proxyCreated(proxy, _singleton, initializer, saltNonce); } /// @dev Allows to get the address for a new proxy contact created via `createProxyWithNonce` /// This method is only meant for address calculation purpose when you use an initializer that would revert, /// therefore the response is returned with a revert. When calling this method set `from` to the address of the proxy factory. /// @param _singleton Address of singleton contract. /// @param initializer Payload for message call sent to new proxy contract. /// @param saltNonce Nonce that will be used to generate the salt to calculate the address of the new proxy contract. function calculateCreateProxyWithNonceAddress( address _singleton, bytes calldata initializer, uint256 saltNonce ) external returns (GnosisSafeProxy proxy) { proxy = deployProxyWithNonce(_singleton, initializer, saltNonce); revert(string(abi.encodePacked(proxy))); } } interface IProxyCreationCallback { function proxyCreated( GnosisSafeProxy proxy, address _singleton, bytes calldata initializer, uint256 saltNonce ) external; }
1	19,493,187	1d62e6987e6d74abcc973e40c3a4377b64526a98e87220c840c9fc49e03f596f	5dbff2fa909c03d1fa9dc365d647d86b0e1e72263fa8bfc90566c94770764cd4	27d7f6147a8748454b88be685c2804f96bf69db1	ffa397285ce46fb78c588a9e993286aac68c37cd	85bba70676a2cbf93888b0ffa8967cb314eafc0f	3d602d80600a3d3981f3363d3d373d3d3d363d73059ffafdc6ef594230de44f824e2bd0a51ca5ded5af43d82803e903d91602b57fd5bf3	363d3d373d3d3d363d73059ffafdc6ef594230de44f824e2bd0a51ca5ded5af43d82803e903d91602b57fd5bf3	pragma solidity 0.7.5; /* The MIT License (MIT) Copyright (c) 2018 Murray Software, LLC. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. / //solhint-disable max-line-length //solhint-disable no-inline-assembly contract CloneFactory { function createClone(address target, bytes32 salt) internal returns (address payable result) { bytes20 targetBytes = bytes20(target); assembly { // load the next free memory slot as a place to store the clone contract data let clone := mload(0x40) // The bytecode block below is responsible for contract initialization // during deployment, it is worth noting the proxied contract constructor will not be called during // the cloning procedure and that is why an initialization function needs to be called after the // clone is created mstore( clone, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000 ) // This stores the address location of the implementation contract // so that the proxy knows where to delegate call logic to mstore(add(clone, 0x14), targetBytes) // The bytecode block is the actual code that is deployed for each clone created. // It forwards all calls to the already deployed implementation via a delegatecall mstore( add(clone, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000 ) // deploy the contract using the CREATE2 opcode // this deploys the minimal proxy defined above, which will proxy all // calls to use the logic defined in the implementation contract `target` result := create2(0, clone, 0x37, salt) } } function isClone(address target, address query) internal view returns (bool result) { bytes20 targetBytes = bytes20(target); assembly { // load the next free memory slot as a place to store the comparison clone let clone := mload(0x40) // The next three lines store the expected bytecode for a miniml proxy // that targets `target` as its implementation contract mstore( clone, 0x363d3d373d3d3d363d7300000000000000000000000000000000000000000000 ) mstore(add(clone, 0xa), targetBytes) mstore( add(clone, 0x1e), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000 ) // the next two lines store the bytecode of the contract that we are checking in memory let other := add(clone, 0x40) extcodecopy(query, other, 0, 0x2d) // Check if the expected bytecode equals the actual bytecode and return the result result := and( eq(mload(clone), mload(other)), eq(mload(add(clone, 0xd)), mload(add(other, 0xd))) ) } } } /* * Contract that exposes the needed erc20 token functions / abstract contract ERC20Interface { // Send _value amount of tokens to address _to function transfer(address _to, uint256 _value) public virtual returns (bool success); // Get the account balance of another account with address _owner function balanceOf(address _owner) public virtual view returns (uint256 balance); } // helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false library TransferHelper { function safeApprove( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('approve(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::safeApprove: approve failed' ); } function safeTransfer( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transfer(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::safeTransfer: transfer failed' ); } function safeTransferFrom( address token, address from, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transferFrom(address,address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::transferFrom: transferFrom failed' ); } function safeTransferETH(address to, uint256 value) internal { (bool success, ) = to.call{value: value}(new bytes(0)); require(success, 'TransferHelper::safeTransferETH: ETH transfer failed'); } } /* * Contract that will forward any incoming Ether to the creator of the contract * / contract Forwarder { // Address to which any funds sent to this contract will be forwarded address public parentAddress; event ForwarderDeposited(address from, uint256 value, bytes data); /* * Initialize the contract, and sets the destination address to that of the creator / function init(address _parentAddress) external onlyUninitialized { parentAddress = _parentAddress; uint256 value = address(this).balance; if (value == 0) { return; } (bool success, ) = parentAddress.call{ value: value }(''); require(success, 'Flush failed'); // NOTE: since we are forwarding on initialization, // we don't have the context of the original sender. // We still emit an event about the forwarding but set // the sender to the forwarder itself emit ForwarderDeposited(address(this), value, msg.data); } /* * Modifier that will execute internal code block only if the sender is the parent address / modifier onlyParent { require(msg.sender == parentAddress, 'Only Parent'); _; } /* * Modifier that will execute internal code block only if the contract has not been initialized yet / modifier onlyUninitialized { require(parentAddress == address(0x0), 'Already initialized'); _; } /* * Default function; Gets called when data is sent but does not match any other function / fallback() external payable { flush(); } /* * Default function; Gets called when Ether is deposited with no data, and forwards it to the parent address / receive() external payable { flush(); } /* * Execute a token transfer of the full balance from the forwarder token to the parent address * @param tokenContractAddress the address of the erc20 token contract / function flushTokens(address tokenContractAddress) external onlyParent { ERC20Interface instance = ERC20Interface(tokenContractAddress); address forwarderAddress = address(this); uint256 forwarderBalance = instance.balanceOf(forwarderAddress); if (forwarderBalance == 0) { return; } TransferHelper.safeTransfer( tokenContractAddress, parentAddress, forwarderBalance ); } /* * Flush the entire balance of the contract to the parent address. */ function flush() public { uint256 value = address(this).balance; if (value == 0) { return; } (bool success, ) = parentAddress.call{ value: value }(''); require(success, 'Flush failed'); emit ForwarderDeposited(msg.sender, value, msg.data); } } contract ForwarderFactory is CloneFactory { address public implementationAddress; event ForwarderCreated(address newForwarderAddress, address parentAddress); constructor(address _implementationAddress) { implementationAddress = _implementationAddress; } function createForwarder(address parent, bytes32 salt) external { // include the signers in the salt so any contract deployed to a given address must have the same signers bytes32 finalSalt = keccak256(abi.encodePacked(parent, salt)); address payable clone = createClone(implementationAddress, finalSalt); Forwarder(clone).init(parent); emit ForwarderCreated(clone, parent); } }
1	19,493,188	66f01cb5af450740aa35e3f3a74d326066155277f7bf63b48b2bc393a8ab110e	cd4658ae43577b76401763bb64db0556a81f2d55f8c855577ea3c2a551a33c48	caa56880c09e1ebba244cf70e2d7168e09d71559	ffa397285ce46fb78c588a9e993286aac68c37cd	4107181c76cfb451287e64591fd5c15170286801	3d602d80600a3d3981f3363d3d373d3d3d363d73059ffafdc6ef594230de44f824e2bd0a51ca5ded5af43d82803e903d91602b57fd5bf3	363d3d373d3d3d363d73059ffafdc6ef594230de44f824e2bd0a51ca5ded5af43d82803e903d91602b57fd5bf3	pragma solidity 0.7.5; /* The MIT License (MIT) Copyright (c) 2018 Murray Software, LLC. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. / //solhint-disable max-line-length //solhint-disable no-inline-assembly contract CloneFactory { function createClone(address target, bytes32 salt) internal returns (address payable result) { bytes20 targetBytes = bytes20(target); assembly { // load the next free memory slot as a place to store the clone contract data let clone := mload(0x40) // The bytecode block below is responsible for contract initialization // during deployment, it is worth noting the proxied contract constructor will not be called during // the cloning procedure and that is why an initialization function needs to be called after the // clone is created mstore( clone, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000 ) // This stores the address location of the implementation contract // so that the proxy knows where to delegate call logic to mstore(add(clone, 0x14), targetBytes) // The bytecode block is the actual code that is deployed for each clone created. // It forwards all calls to the already deployed implementation via a delegatecall mstore( add(clone, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000 ) // deploy the contract using the CREATE2 opcode // this deploys the minimal proxy defined above, which will proxy all // calls to use the logic defined in the implementation contract `target` result := create2(0, clone, 0x37, salt) } } function isClone(address target, address query) internal view returns (bool result) { bytes20 targetBytes = bytes20(target); assembly { // load the next free memory slot as a place to store the comparison clone let clone := mload(0x40) // The next three lines store the expected bytecode for a miniml proxy // that targets `target` as its implementation contract mstore( clone, 0x363d3d373d3d3d363d7300000000000000000000000000000000000000000000 ) mstore(add(clone, 0xa), targetBytes) mstore( add(clone, 0x1e), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000 ) // the next two lines store the bytecode of the contract that we are checking in memory let other := add(clone, 0x40) extcodecopy(query, other, 0, 0x2d) // Check if the expected bytecode equals the actual bytecode and return the result result := and( eq(mload(clone), mload(other)), eq(mload(add(clone, 0xd)), mload(add(other, 0xd))) ) } } } /* * Contract that exposes the needed erc20 token functions / abstract contract ERC20Interface { // Send _value amount of tokens to address _to function transfer(address _to, uint256 _value) public virtual returns (bool success); // Get the account balance of another account with address _owner function balanceOf(address _owner) public virtual view returns (uint256 balance); } // helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false library TransferHelper { function safeApprove( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('approve(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::safeApprove: approve failed' ); } function safeTransfer( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transfer(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::safeTransfer: transfer failed' ); } function safeTransferFrom( address token, address from, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transferFrom(address,address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::transferFrom: transferFrom failed' ); } function safeTransferETH(address to, uint256 value) internal { (bool success, ) = to.call{value: value}(new bytes(0)); require(success, 'TransferHelper::safeTransferETH: ETH transfer failed'); } } /* * Contract that will forward any incoming Ether to the creator of the contract * / contract Forwarder { // Address to which any funds sent to this contract will be forwarded address public parentAddress; event ForwarderDeposited(address from, uint256 value, bytes data); /* * Initialize the contract, and sets the destination address to that of the creator / function init(address _parentAddress) external onlyUninitialized { parentAddress = _parentAddress; uint256 value = address(this).balance; if (value == 0) { return; } (bool success, ) = parentAddress.call{ value: value }(''); require(success, 'Flush failed'); // NOTE: since we are forwarding on initialization, // we don't have the context of the original sender. // We still emit an event about the forwarding but set // the sender to the forwarder itself emit ForwarderDeposited(address(this), value, msg.data); } /* * Modifier that will execute internal code block only if the sender is the parent address / modifier onlyParent { require(msg.sender == parentAddress, 'Only Parent'); _; } /* * Modifier that will execute internal code block only if the contract has not been initialized yet / modifier onlyUninitialized { require(parentAddress == address(0x0), 'Already initialized'); _; } /* * Default function; Gets called when data is sent but does not match any other function / fallback() external payable { flush(); } /* * Default function; Gets called when Ether is deposited with no data, and forwards it to the parent address / receive() external payable { flush(); } /* * Execute a token transfer of the full balance from the forwarder token to the parent address * @param tokenContractAddress the address of the erc20 token contract / function flushTokens(address tokenContractAddress) external onlyParent { ERC20Interface instance = ERC20Interface(tokenContractAddress); address forwarderAddress = address(this); uint256 forwarderBalance = instance.balanceOf(forwarderAddress); if (forwarderBalance == 0) { return; } TransferHelper.safeTransfer( tokenContractAddress, parentAddress, forwarderBalance ); } /* * Flush the entire balance of the contract to the parent address. */ function flush() public { uint256 value = address(this).balance; if (value == 0) { return; } (bool success, ) = parentAddress.call{ value: value }(''); require(success, 'Flush failed'); emit ForwarderDeposited(msg.sender, value, msg.data); } } contract ForwarderFactory is CloneFactory { address public implementationAddress; event ForwarderCreated(address newForwarderAddress, address parentAddress); constructor(address _implementationAddress) { implementationAddress = _implementationAddress; } function createForwarder(address parent, bytes32 salt) external { // include the signers in the salt so any contract deployed to a given address must have the same signers bytes32 finalSalt = keccak256(abi.encodePacked(parent, salt)); address payable clone = createClone(implementationAddress, finalSalt); Forwarder(clone).init(parent); emit ForwarderCreated(clone, parent); } }
1	19,493,189	a69ce4130ba14b07098ea1f65bc472e7840db4859c0badd586be858e2a7832a9	05e79dd40b4d90c0497f8340a8e2b536c0ae068a1edfb179e3b6e261c696ced3	83255b06dc6377d097eadd9ada0f69112dd79509	7335db10622eecdeffadaee7f2454e37aedf7002	1d9db0814e1f2dfea750d9f43664e5946aaee3d6	60a03461009757601f6102cd38819003918201601f19168301916001600160401b0383118484101761009c5780849260209460405283398101031261009757516001600160a01b0381169081810361009757608052604051907f1cf3b03a6cf19fa2baba4df148e9dcabedea7f8a5c07840e207e5c089be95d3e600080a261021a90816100b382396080518181816028015260ef0152f35b600080fd5b634e487b7160e01b600052604160045260246000fdfe6080806040523615610016575b6100146100da565b005b635c60da1b60e01b81526020816004817f00000000000000000000000000000000000000000000000000000000000000006001600160a01b03165afa9081156100ce57600091610071575b5061006b9061017d565b3861000c565b6020913d83116100c6575b601f8301601f191682019067ffffffffffffffff8211838310176100b2575060405261006b916100ac910161019e565b90610061565b634e487b7160e01b81526041600452602490fd5b3d925061007c565b6040513d6000823e3d90fd5b604051635c60da1b60e01b81526020816004817f00000000000000000000000000000000000000000000000000000000000000006001600160a01b03165afa80156100ce57600090610133575b610131915061017d565b565b6020903d8211610175575b601f8201601f191683019067ffffffffffffffff8211848310176100b2575060405261013191610170918101906101c5565b610127565b3d915061013e565b90506000808092368280378136915af43d82803e1561019a573d90f35b3d90fd5b602090607f1901126101c0576080516001600160a01b03811681036101c05790565b600080fd5b908160209103126101c057516001600160a01b03811681036101c0579056fea2646970667358221220c478b1615b0d76011a7874324ac15b3d7fb464e980c3c09d2d779b62a970e18664736f6c6343000811003300000000000000000000000023b0c2381075df4002bc6d3b9baf52ab0acb1e9b	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	{{ "language": "Solidity", "sources": { "@openzeppelin/contracts/proxy/beacon/IBeacon.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)\n\npragma solidity ^0.8.0;\n\n/*\n @dev This is the interface that {BeaconProxy} expects of its beacon.\n /\ninterface IBeacon {\n /\n @dev Must return an address that can be used as a delegate call target.\n \n {BeaconProxy} will check that this address is a contract.\n /\n function implementation() external view returns (address);\n}\n" }, "@openzeppelin/contracts/proxy/Proxy.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (proxy/Proxy.sol)\n\npragma solidity ^0.8.0;\n\n/\n @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM\n * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to\n * be specified by overriding the virtual {_implementation} function.\n \n Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a\n * different contract through the {_delegate} function.\n \n The success and return data of the delegated call will be returned back to the caller of the proxy.\n /\nabstract contract Proxy {\n /\n @dev Delegates the current call to `implementation`.\n \n This function does not return to its internal call site, it will return directly to the external caller.\n /\n function _delegate(address implementation) internal virtual {\n assembly {\n // Copy msg.data. We take full control of memory in this inline assembly\n // block because it will not return to Solidity code. We overwrite the\n // Solidity scratch pad at memory position 0.\n calldatacopy(0, 0, calldatasize())\n\n // Call the implementation.\n // out and outsize are 0 because we don't know the size yet.\n let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)\n\n // Copy the returned data.\n returndatacopy(0, 0, returndatasize())\n\n switch result\n // delegatecall returns 0 on error.\n case 0 {\n revert(0, returndatasize())\n }\n default {\n return(0, returndatasize())\n }\n }\n }\n\n /\n @dev This is a virtual function that should be overridden so it returns the address to which the fallback function\n * and {_fallback} should delegate.\n /\n function _implementation() internal view virtual returns (address);\n\n /\n @dev Delegates the current call to the address returned by `_implementation()`.\n \n This function does not return to its internal call site, it will return directly to the external caller.\n /\n function _fallback() internal virtual {\n _beforeFallback();\n _delegate(_implementation());\n }\n\n /\n @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other\n * function in the contract matches the call data.\n /\n fallback() external payable virtual {\n _fallback();\n }\n\n /\n @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data\n * is empty.\n /\n receive() external payable virtual {\n _fallback();\n }\n\n /\n @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`\n * call, or as part of the Solidity `fallback` or `receive` functions.\n \n If overridden should call `super._beforeFallback()`.\n /\n function _beforeFallback() internal virtual {}\n}\n" }, "contracts/utils/BeaconProxy.sol": { "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.0;\n\nimport \"@openzeppelin/contracts/proxy/beacon/IBeacon.sol\";\nimport \"@openzeppelin/contracts/proxy/Proxy.sol\";\n\n/// @custom:security-contact [email protected]\ncontract BeaconProxy is Proxy {\n IBeacon private immutable _beacon;\n\n event BeaconUpgraded(IBeacon indexed beacon);\n\n constructor(IBeacon beacon)\n {\n _beacon = beacon;\n emit BeaconUpgraded(beacon);\n }\n\n function _implementation()\n internal\n view\n override\n returns (address)\n {\n return _beacon.implementation();\n }\n}\n" } }, "settings": { "optimizer": { "enabled": true, "runs": 200 }, "viaIR": true, "debug": { "revertStrings": "strip" }, "outputSelection": { "": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} } }}
1	19,493,189	a69ce4130ba14b07098ea1f65bc472e7840db4859c0badd586be858e2a7832a9	05e79dd40b4d90c0497f8340a8e2b536c0ae068a1edfb179e3b6e261c696ced3	83255b06dc6377d097eadd9ada0f69112dd79509	7335db10622eecdeffadaee7f2454e37aedf7002	0a5cb919539a6e290c932256aa24a7abaa6b30b3	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	{{ "language": "Solidity", "sources": { "@openzeppelin/contracts/proxy/beacon/IBeacon.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)\n\npragma solidity ^0.8.0;\n\n/*\n @dev This is the interface that {BeaconProxy} expects of its beacon.\n /\ninterface IBeacon {\n /\n @dev Must return an address that can be used as a delegate call target.\n \n {BeaconProxy} will check that this address is a contract.\n /\n function implementation() external view returns (address);\n}\n" }, "@openzeppelin/contracts/proxy/Proxy.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (proxy/Proxy.sol)\n\npragma solidity ^0.8.0;\n\n/\n @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM\n * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to\n * be specified by overriding the virtual {_implementation} function.\n \n Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a\n * different contract through the {_delegate} function.\n \n The success and return data of the delegated call will be returned back to the caller of the proxy.\n /\nabstract contract Proxy {\n /\n @dev Delegates the current call to `implementation`.\n \n This function does not return to its internal call site, it will return directly to the external caller.\n /\n function _delegate(address implementation) internal virtual {\n assembly {\n // Copy msg.data. We take full control of memory in this inline assembly\n // block because it will not return to Solidity code. We overwrite the\n // Solidity scratch pad at memory position 0.\n calldatacopy(0, 0, calldatasize())\n\n // Call the implementation.\n // out and outsize are 0 because we don't know the size yet.\n let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)\n\n // Copy the returned data.\n returndatacopy(0, 0, returndatasize())\n\n switch result\n // delegatecall returns 0 on error.\n case 0 {\n revert(0, returndatasize())\n }\n default {\n return(0, returndatasize())\n }\n }\n }\n\n /\n @dev This is a virtual function that should be overridden so it returns the address to which the fallback function\n * and {_fallback} should delegate.\n /\n function _implementation() internal view virtual returns (address);\n\n /\n @dev Delegates the current call to the address returned by `_implementation()`.\n \n This function does not return to its internal call site, it will return directly to the external caller.\n /\n function _fallback() internal virtual {\n _beforeFallback();\n _delegate(_implementation());\n }\n\n /\n @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other\n * function in the contract matches the call data.\n /\n fallback() external payable virtual {\n _fallback();\n }\n\n /\n @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data\n * is empty.\n /\n receive() external payable virtual {\n _fallback();\n }\n\n /\n @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`\n * call, or as part of the Solidity `fallback` or `receive` functions.\n \n If overridden should call `super._beforeFallback()`.\n /\n function _beforeFallback() internal virtual {}\n}\n" }, "contracts/utils/BeaconProxy.sol": { "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.0;\n\nimport \"@openzeppelin/contracts/proxy/beacon/IBeacon.sol\";\nimport \"@openzeppelin/contracts/proxy/Proxy.sol\";\n\n/// @custom:security-contact [email protected]\ncontract BeaconProxy is Proxy {\n IBeacon private immutable _beacon;\n\n event BeaconUpgraded(IBeacon indexed beacon);\n\n constructor(IBeacon beacon)\n {\n _beacon = beacon;\n emit BeaconUpgraded(beacon);\n }\n\n function _implementation()\n internal\n view\n override\n returns (address)\n {\n return _beacon.implementation();\n }\n}\n" } }, "settings": { "optimizer": { "enabled": true, "runs": 200 }, "viaIR": true, "debug": { "revertStrings": "strip" }, "outputSelection": { "": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} } }}
1	19,493,191	c11cf1b8dd4dafb2d69f4be273f58e8f1b02bc36361e160ae353ede041614ebe	d7455af40bdcae078bb47fc563447236b55729775988e1bf6c670daa89e44b79	8b14b2599b0effd879fc6ff13d1b11382503a642	a6b71e26c5e0845f74c812102ca7114b6a896ab2	ee06a48bbb481f9295ba3b905e0f3a374fe37aff	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	608060405273ffffffffffffffffffffffffffffffffffffffff600054167fa619486e0000000000000000000000000000000000000000000000000000000060003514156050578060005260206000f35b3660008037600080366000845af43d6000803e60008114156070573d6000fd5b3d6000f3fea2646970667358221220d1429297349653a4918076d650332de1a1068c5f3e07c5c82360c277770b955264736f6c63430007060033	// SPDX-License-Identifier: LGPL-3.0-only pragma solidity >=0.7.0 <0.9.0; /// @title IProxy - Helper interface to access masterCopy of the Proxy on-chain /// @author Richard Meissner - <[email protected]> interface IProxy { function masterCopy() external view returns (address); } /// @title GnosisSafeProxy - Generic proxy contract allows to execute all transactions applying the code of a master contract. /// @author Stefan George - <[email protected]> /// @author Richard Meissner - <[email protected]> contract GnosisSafeProxy { // singleton always needs to be first declared variable, to ensure that it is at the same location in the contracts to which calls are delegated. // To reduce deployment costs this variable is internal and needs to be retrieved via `getStorageAt` address internal singleton; /// @dev Constructor function sets address of singleton contract. /// @param _singleton Singleton address. constructor(address _singleton) { require(_singleton != address(0), "Invalid singleton address provided"); singleton = _singleton; } /// @dev Fallback function forwards all transactions and returns all received return data. fallback() external payable { // solhint-disable-next-line no-inline-assembly assembly { let _singleton := and(sload(0), 0xffffffffffffffffffffffffffffffffffffffff) // 0xa619486e == keccak("masterCopy()"). The value is right padded to 32-bytes with 0s if eq(calldataload(0), 0xa619486e00000000000000000000000000000000000000000000000000000000) { mstore(0, _singleton) return(0, 0x20) } calldatacopy(0, 0, calldatasize()) let success := delegatecall(gas(), _singleton, 0, calldatasize(), 0, 0) returndatacopy(0, 0, returndatasize()) if eq(success, 0) { revert(0, returndatasize()) } return(0, returndatasize()) } } } /// @title Proxy Factory - Allows to create new proxy contact and execute a message call to the new proxy within one transaction. /// @author Stefan George - <[email protected]> contract GnosisSafeProxyFactory { event ProxyCreation(GnosisSafeProxy proxy, address singleton); /// @dev Allows to create new proxy contact and execute a message call to the new proxy within one transaction. /// @param singleton Address of singleton contract. /// @param data Payload for message call sent to new proxy contract. function createProxy(address singleton, bytes memory data) public returns (GnosisSafeProxy proxy) { proxy = new GnosisSafeProxy(singleton); if (data.length > 0) // solhint-disable-next-line no-inline-assembly assembly { if eq(call(gas(), proxy, 0, add(data, 0x20), mload(data), 0, 0), 0) { revert(0, 0) } } emit ProxyCreation(proxy, singleton); } /// @dev Allows to retrieve the runtime code of a deployed Proxy. This can be used to check that the expected Proxy was deployed. function proxyRuntimeCode() public pure returns (bytes memory) { return type(GnosisSafeProxy).runtimeCode; } /// @dev Allows to retrieve the creation code used for the Proxy deployment. With this it is easily possible to calculate predicted address. function proxyCreationCode() public pure returns (bytes memory) { return type(GnosisSafeProxy).creationCode; } /// @dev Allows to create new proxy contact using CREATE2 but it doesn't run the initializer. /// This method is only meant as an utility to be called from other methods /// @param _singleton Address of singleton contract. /// @param initializer Payload for message call sent to new proxy contract. /// @param saltNonce Nonce that will be used to generate the salt to calculate the address of the new proxy contract. function deployProxyWithNonce( address _singleton, bytes memory initializer, uint256 saltNonce ) internal returns (GnosisSafeProxy proxy) { // If the initializer changes the proxy address should change too. Hashing the initializer data is cheaper than just concatinating it bytes32 salt = keccak256(abi.encodePacked(keccak256(initializer), saltNonce)); bytes memory deploymentData = abi.encodePacked(type(GnosisSafeProxy).creationCode, uint256(uint160(_singleton))); // solhint-disable-next-line no-inline-assembly assembly { proxy := create2(0x0, add(0x20, deploymentData), mload(deploymentData), salt) } require(address(proxy) != address(0), "Create2 call failed"); } /// @dev Allows to create new proxy contact and execute a message call to the new proxy within one transaction. /// @param _singleton Address of singleton contract. /// @param initializer Payload for message call sent to new proxy contract. /// @param saltNonce Nonce that will be used to generate the salt to calculate the address of the new proxy contract. function createProxyWithNonce( address _singleton, bytes memory initializer, uint256 saltNonce ) public returns (GnosisSafeProxy proxy) { proxy = deployProxyWithNonce(_singleton, initializer, saltNonce); if (initializer.length > 0) // solhint-disable-next-line no-inline-assembly assembly { if eq(call(gas(), proxy, 0, add(initializer, 0x20), mload(initializer), 0, 0), 0) { revert(0, 0) } } emit ProxyCreation(proxy, _singleton); } /// @dev Allows to create new proxy contact, execute a message call to the new proxy and call a specified callback within one transaction /// @param _singleton Address of singleton contract. /// @param initializer Payload for message call sent to new proxy contract. /// @param saltNonce Nonce that will be used to generate the salt to calculate the address of the new proxy contract. /// @param callback Callback that will be invoced after the new proxy contract has been successfully deployed and initialized. function createProxyWithCallback( address _singleton, bytes memory initializer, uint256 saltNonce, IProxyCreationCallback callback ) public returns (GnosisSafeProxy proxy) { uint256 saltNonceWithCallback = uint256(keccak256(abi.encodePacked(saltNonce, callback))); proxy = createProxyWithNonce(_singleton, initializer, saltNonceWithCallback); if (address(callback) != address(0)) callback.proxyCreated(proxy, _singleton, initializer, saltNonce); } /// @dev Allows to get the address for a new proxy contact created via `createProxyWithNonce` /// This method is only meant for address calculation purpose when you use an initializer that would revert, /// therefore the response is returned with a revert. When calling this method set `from` to the address of the proxy factory. /// @param _singleton Address of singleton contract. /// @param initializer Payload for message call sent to new proxy contract. /// @param saltNonce Nonce that will be used to generate the salt to calculate the address of the new proxy contract. function calculateCreateProxyWithNonceAddress( address _singleton, bytes calldata initializer, uint256 saltNonce ) external returns (GnosisSafeProxy proxy) { proxy = deployProxyWithNonce(_singleton, initializer, saltNonce); revert(string(abi.encodePacked(proxy))); } } interface IProxyCreationCallback { function proxyCreated( GnosisSafeProxy proxy, address _singleton, bytes calldata initializer, uint256 saltNonce ) external; }
1	19,493,194	1481e97926eac838df1ee6ef16e3df59dea6bb40cac211e8264b4460744ed1ca	4aabc03612b450f05e5a5498dc8b90180433e07d98f76688465dff051ce5501d	a9a0b8a5e1adca0caccc63a168f053cd3be30808	01cd62ed13d0b666e2a10d13879a763dfd1dab99	c4362039c1987625973af0b45b6a3b0aac66bd64	3d602d80600a3d3981f3363d3d373d3d3d363d7308656072fee78f1d07e38c189de56daa9863597a5af43d82803e903d91602b57fd5bf3	363d3d373d3d3d363d7308656072fee78f1d07e38c189de56daa9863597a5af43d82803e903d91602b57fd5bf3
1	19,493,194	1481e97926eac838df1ee6ef16e3df59dea6bb40cac211e8264b4460744ed1ca	db666de36434116e5b85ce215308e28bc7636b1ad7f97fead24c286d66bd7682	000099b4a4d3ceb370d3a8a6235d24e07a8c0000	ee2a0343e825b2e5981851299787a679ce08216d	a12058cbc7549015307ae534541113da188a760a	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
1	19,493,196	017407e1137a82a5976bc56215991bd41d17018119736934c84b9e3633dad3eb	378e8dc1e8aeae0c8206e81570f8499292d2b4c360f43edaad18024deaa2ac6e	820fd3a13bacbfc70d0fa974a7f83123830887bc	ffa397285ce46fb78c588a9e993286aac68c37cd	fd26f520f5daaadba968d4ce7f9b06f85e379d02	3d602d80600a3d3981f3363d3d373d3d3d363d73059ffafdc6ef594230de44f824e2bd0a51ca5ded5af43d82803e903d91602b57fd5bf3	363d3d373d3d3d363d73059ffafdc6ef594230de44f824e2bd0a51ca5ded5af43d82803e903d91602b57fd5bf3	pragma solidity 0.7.5; /* The MIT License (MIT) Copyright (c) 2018 Murray Software, LLC. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. / //solhint-disable max-line-length //solhint-disable no-inline-assembly contract CloneFactory { function createClone(address target, bytes32 salt) internal returns (address payable result) { bytes20 targetBytes = bytes20(target); assembly { // load the next free memory slot as a place to store the clone contract data let clone := mload(0x40) // The bytecode block below is responsible for contract initialization // during deployment, it is worth noting the proxied contract constructor will not be called during // the cloning procedure and that is why an initialization function needs to be called after the // clone is created mstore( clone, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000 ) // This stores the address location of the implementation contract // so that the proxy knows where to delegate call logic to mstore(add(clone, 0x14), targetBytes) // The bytecode block is the actual code that is deployed for each clone created. // It forwards all calls to the already deployed implementation via a delegatecall mstore( add(clone, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000 ) // deploy the contract using the CREATE2 opcode // this deploys the minimal proxy defined above, which will proxy all // calls to use the logic defined in the implementation contract `target` result := create2(0, clone, 0x37, salt) } } function isClone(address target, address query) internal view returns (bool result) { bytes20 targetBytes = bytes20(target); assembly { // load the next free memory slot as a place to store the comparison clone let clone := mload(0x40) // The next three lines store the expected bytecode for a miniml proxy // that targets `target` as its implementation contract mstore( clone, 0x363d3d373d3d3d363d7300000000000000000000000000000000000000000000 ) mstore(add(clone, 0xa), targetBytes) mstore( add(clone, 0x1e), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000 ) // the next two lines store the bytecode of the contract that we are checking in memory let other := add(clone, 0x40) extcodecopy(query, other, 0, 0x2d) // Check if the expected bytecode equals the actual bytecode and return the result result := and( eq(mload(clone), mload(other)), eq(mload(add(clone, 0xd)), mload(add(other, 0xd))) ) } } } /* * Contract that exposes the needed erc20 token functions / abstract contract ERC20Interface { // Send _value amount of tokens to address _to function transfer(address _to, uint256 _value) public virtual returns (bool success); // Get the account balance of another account with address _owner function balanceOf(address _owner) public virtual view returns (uint256 balance); } // helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false library TransferHelper { function safeApprove( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('approve(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::safeApprove: approve failed' ); } function safeTransfer( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transfer(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::safeTransfer: transfer failed' ); } function safeTransferFrom( address token, address from, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transferFrom(address,address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value)); require( success && (data.length == 0 \|\| abi.decode(data, (bool))), 'TransferHelper::transferFrom: transferFrom failed' ); } function safeTransferETH(address to, uint256 value) internal { (bool success, ) = to.call{value: value}(new bytes(0)); require(success, 'TransferHelper::safeTransferETH: ETH transfer failed'); } } /* * Contract that will forward any incoming Ether to the creator of the contract * / contract Forwarder { // Address to which any funds sent to this contract will be forwarded address public parentAddress; event ForwarderDeposited(address from, uint256 value, bytes data); /* * Initialize the contract, and sets the destination address to that of the creator / function init(address _parentAddress) external onlyUninitialized { parentAddress = _parentAddress; uint256 value = address(this).balance; if (value == 0) { return; } (bool success, ) = parentAddress.call{ value: value }(''); require(success, 'Flush failed'); // NOTE: since we are forwarding on initialization, // we don't have the context of the original sender. // We still emit an event about the forwarding but set // the sender to the forwarder itself emit ForwarderDeposited(address(this), value, msg.data); } /* * Modifier that will execute internal code block only if the sender is the parent address / modifier onlyParent { require(msg.sender == parentAddress, 'Only Parent'); _; } /* * Modifier that will execute internal code block only if the contract has not been initialized yet / modifier onlyUninitialized { require(parentAddress == address(0x0), 'Already initialized'); _; } /* * Default function; Gets called when data is sent but does not match any other function / fallback() external payable { flush(); } /* * Default function; Gets called when Ether is deposited with no data, and forwards it to the parent address / receive() external payable { flush(); } /* * Execute a token transfer of the full balance from the forwarder token to the parent address * @param tokenContractAddress the address of the erc20 token contract / function flushTokens(address tokenContractAddress) external onlyParent { ERC20Interface instance = ERC20Interface(tokenContractAddress); address forwarderAddress = address(this); uint256 forwarderBalance = instance.balanceOf(forwarderAddress); if (forwarderBalance == 0) { return; } TransferHelper.safeTransfer( tokenContractAddress, parentAddress, forwarderBalance ); } /* * Flush the entire balance of the contract to the parent address. */ function flush() public { uint256 value = address(this).balance; if (value == 0) { return; } (bool success, ) = parentAddress.call{ value: value }(''); require(success, 'Flush failed'); emit ForwarderDeposited(msg.sender, value, msg.data); } } contract ForwarderFactory is CloneFactory { address public implementationAddress; event ForwarderCreated(address newForwarderAddress, address parentAddress); constructor(address _implementationAddress) { implementationAddress = _implementationAddress; } function createForwarder(address parent, bytes32 salt) external { // include the signers in the salt so any contract deployed to a given address must have the same signers bytes32 finalSalt = keccak256(abi.encodePacked(parent, salt)); address payable clone = createClone(implementationAddress, finalSalt); Forwarder(clone).init(parent); emit ForwarderCreated(clone, parent); } }
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SPDX-License-Identifier: MIT pragma solidity 0.8.25; /** * @dev Interface of the ERC20 standard as defined in the EIP. / interface IERC20 { /* * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. / event Transfer(address indexed from, address indexed to, uint256 value); /* * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. / event Approval( address indexed owner, address indexed spender, uint256 value ); /* * @dev Returns the value of tokens in existence. / function totalSupply() external view returns (uint256); /* * @dev Returns the value of tokens owned by `account`. / function balanceOf(address account) external view returns (uint256); /* * @dev Moves a `value` amount of tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. / function transfer(address to, uint256 value) external returns (bool); /* * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. / function allowance( address owner, address spender ) external view returns (uint256); /* * @dev Sets a `value` amount of tokens as the allowance of `spender` over the * caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. / function approve(address spender, uint256 value) external returns (bool); /* * @dev Moves a `value` amount of tokens from `from` to `to` using the * allowance mechanism. `value` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. / function transferFrom( address from, address to, uint256 value ) external returns (bool); } /* * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. / abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } } /* * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. / abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant NOT_ENTERED = 1; uint256 private constant ENTERED = 2; uint256 private _status; /* * @dev Unauthorized reentrant call. / error ReentrancyGuardReentrantCall(); constructor() { _status = NOT_ENTERED; } /* * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. / modifier nonReentrant() { _nonReentrantBefore(); _; _nonReentrantAfter(); } function _nonReentrantBefore() private { // On the first call to nonReentrant, _status will be NOT_ENTERED if (_status == ENTERED) { revert ReentrancyGuardReentrantCall(); } // Any calls to nonReentrant after this point will fail _status = ENTERED; } function _nonReentrantAfter() private { // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = NOT_ENTERED; } /* * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a * `nonReentrant` function in the call stack. / function _reentrancyGuardEntered() internal view returns (bool) { return _status == ENTERED; } } contract TokenVestingSTEAK is IERC20, Context, ReentrancyGuard { IERC20 public constant tokenAddress = IERC20(0xC4c244F1dbCA07083feE35220D2169957c275e68); struct VestingSchedule { bool initialized; address beneficiary; uint256 cliff; uint256 start; uint256 duration; uint256 slicePeriodSeconds; uint256 amountTotal; uint256 released; } bytes32[] private _vestingSchedulesIds; uint256 private _totalSupply; mapping(address => uint256) private _holdersVestingCount; mapping(bytes32 => VestingSchedule) private _vestingSchedules; mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; event TokensReleased(address indexed beneficiary, uint256 amount); event VestingScheduleCreated( address indexed beneficiary, uint256 cliff, uint256 start, uint256 duration, uint256 slicePeriodSeconds, uint256 amount ); modifier onlyIfBeneficiaryExists(address beneficiary) { require( _holdersVestingCount[beneficiary] > 0, "TokenVestingSTEAK: INVALID Beneficiary Address! no vesting schedule exists for that beneficiary" ); _; } constructor() {} function name() external pure returns (string memory) { return "Vested STEAK"; } function symbol() external pure returns (string memory) { return "vSTEAK"; } function decimals() external pure returns (uint8) { return 18; } function totalSupply() external view returns (uint256) { return _totalSupply; } function balanceOf(address account) external view returns (uint256) { return _balances[account]; } function getCurrentTime() external view returns (uint256) { return block.timestamp; } function approve(address spender, uint256 amount) external returns (bool) { _approve(_msgSender(), spender, amount); return true; } function _approve(address owner, address spender, uint256 amount) private { require( owner != address(0), "TokenVestingSTEAK: approve from the zero address" ); require( spender != address(0), "TokenVestingSTEAK: approve to the zero address" ); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function allowance( address owner, address spender ) public view returns (uint256) { return _allowances[owner][spender]; } function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool) { require( allowance(sender, _msgSender()) >= amount, "TokenVestingSTEAK: insufficient allowance" ); _approve( sender, _msgSender(), (allowance(sender, _msgSender()) - amount) ); _transfer(sender, recipient, amount); return true; } function transfer(address to, uint256 amount) external returns (bool) { address owner = _msgSender(); _transfer(owner, to, amount); return true; } function _transfer(address from, address to, uint256 amount) private { require( from != address(0), "TokenVestingSTEAK: transfer from the zero address" ); require( to != address(0), "TokenVestingSTEAK: transfer to the zero address" ); require( _balances[from] >= amount, "TokenVestingSTEAK: transfer amount exceeds balance" ); _balances[from] -= amount; uint256 transferAmount = amount; uint256 newCliff; uint256 newStart; uint256 newDuration; VestingSchedule storage vestingSchedule; for ( uint256 i = 0; i < getVestingSchedulesCountByBeneficiary(from); i++ ) { vestingSchedule = _vestingSchedules[ computeVestingScheduleIdForAddressAndIndex(from, i) ]; (newCliff, newStart, newDuration) = _generateCSD( vestingSchedule.cliff, vestingSchedule.start, vestingSchedule.duration ); uint256 remainingAmount = vestingSchedule.amountTotal - vestingSchedule.released; if (transferAmount <= remainingAmount) { vestingSchedule.amountTotal -= (transferAmount + vestingSchedule.released); vestingSchedule.released = 0; vestingSchedule.cliff = newStart + newCliff; vestingSchedule.start = newStart; vestingSchedule.duration = newDuration; _totalSupply -= transferAmount; _createVestingSchedule( to, newStart, newCliff, newDuration, vestingSchedule.slicePeriodSeconds, transferAmount ); break; } else { if (remainingAmount == 0) { continue; } vestingSchedule.amountTotal = 0; vestingSchedule.released = 0; _totalSupply -= remainingAmount; transferAmount -= remainingAmount; _createVestingSchedule( to, newStart, newCliff, newDuration, vestingSchedule.slicePeriodSeconds, remainingAmount ); } } emit Transfer(from, to, amount); } function _generateCSD( uint256 _cliff, uint256 _start, uint256 _duration ) private view returns (uint256, uint256, uint256) { uint256 newCliff; uint256 newStart; uint256 newDuration; uint256 oldCliff = _cliff - _start; uint256 passedCliff = 0; uint256 passedDuration = 0; if (block.timestamp < _start) { newCliff = oldCliff; newDuration = _duration; } else { if (block.timestamp < _cliff) { newCliff = _cliff - block.timestamp; newDuration = _duration; passedCliff = oldCliff - newCliff; passedDuration = 0; } else { newCliff = 0; passedCliff = oldCliff; passedDuration = block.timestamp - _cliff; if (passedDuration < _duration) { newDuration = _duration - passedDuration; } else { newDuration = 1; } } } newStart = _start + passedCliff + passedDuration; return (newCliff, newStart, newDuration); } function getVestingIdAtIndex( uint256 index ) external view returns (bytes32) { require( index < getVestingSchedulesCount(), "TokenVestingSTEAK: index out of bounds" ); return _vestingSchedulesIds[index]; } function getVestingSchedulesCountByBeneficiary( address _beneficiary ) public view returns (uint256) { return _holdersVestingCount[_beneficiary]; } function getVestingScheduleByBeneficiaryAndIndex( address beneficiary, uint256 index ) external view onlyIfBeneficiaryExists(beneficiary) returns (VestingSchedule memory) { require( index < _holdersVestingCount[beneficiary], "TokenVestingSTEAK: INVALID Vesting Schedule Index! no vesting schedule exists at this index for that beneficiary" ); return getVestingSchedule( computeVestingScheduleIdForAddressAndIndex(beneficiary, index) ); } function computeVestingScheduleIdForAddressAndIndex( address holder, uint256 index ) public pure returns (bytes32) { return keccak256(abi.encodePacked(holder, index)); } function getVestingSchedule( bytes32 vestingScheduleId ) public view returns (VestingSchedule memory) { VestingSchedule storage vestingSchedule = _vestingSchedules[ vestingScheduleId ]; require( vestingSchedule.initialized == true, "TokenVestingSTEAK: INVALID Vesting Schedule ID! no vesting schedule exists for that id" ); return vestingSchedule; } function createVestingSchedule( address _beneficiary, uint256 _start, uint256 _cliff, uint256 _duration, uint256 _slicePeriodSeconds, uint256 _amount ) external returns (bool) { require( tokenAddress.transferFrom(_msgSender(), address(this), _amount), "TokenVestingSTEAK: token STEAK transferFrom not succeeded" ); _createVestingSchedule( _beneficiary, _start, _cliff, _duration, _slicePeriodSeconds, _amount ); emit VestingScheduleCreated( _beneficiary, _cliff, _start, _duration, _slicePeriodSeconds, _amount ); emit Transfer(address(0), _beneficiary, _amount); return true; } function _createVestingSchedule( address _beneficiary, uint256 _start, uint256 _cliff, uint256 _duration, uint256 _slicePeriodSeconds, uint256 _amount ) private { require(_duration > 0, "TokenVestingSTEAK: duration must be > 0"); require(_amount > 0, "TokenVestingSTEAK: amount must be > 0"); require( _slicePeriodSeconds >= 1, "TokenVestingSTEAK: slicePeriodSeconds must be >= 1" ); bytes32 vestingScheduleId = computeNextVestingScheduleIdForHolder( _beneficiary ); uint256 cliff = _start + _cliff; _vestingSchedules[vestingScheduleId] = VestingSchedule( true, _beneficiary, cliff, _start, _duration, _slicePeriodSeconds, _amount, 0 ); _balances[_beneficiary] += _amount; _totalSupply += _amount; _vestingSchedulesIds.push(vestingScheduleId); _holdersVestingCount[_beneficiary]++; } function computeNextVestingScheduleIdForHolder( address holder ) private view returns (bytes32) { return computeVestingScheduleIdForAddressAndIndex( holder, _holdersVestingCount[holder] ); } function _computeReleasableAmount( VestingSchedule memory vestingSchedule ) private view returns (uint256) { if (block.timestamp < vestingSchedule.cliff) { return 0; } else if ( block.timestamp >= vestingSchedule.cliff + vestingSchedule.duration ) { return (vestingSchedule.amountTotal - vestingSchedule.released); } else { uint256 timeFromStart = block.timestamp - vestingSchedule.cliff; uint256 secondsPerSlice = vestingSchedule.slicePeriodSeconds; uint256 releaseableSlicePeriods = timeFromStart / secondsPerSlice; uint256 releaseableSeconds = releaseableSlicePeriods secondsPerSlice; uint256 releaseableAmount = (vestingSchedule.amountTotal * releaseableSeconds) / vestingSchedule.duration; releaseableAmount -= vestingSchedule.released; return releaseableAmount; } } function claimFromAllVestings() external nonReentrant onlyIfBeneficiaryExists(_msgSender()) returns (bool) { address beneficiary = _msgSender(); uint256 vestingSchedulesCountByBeneficiary = getVestingSchedulesCountByBeneficiary( beneficiary ); VestingSchedule storage vestingSchedule; uint256 totalReleaseableAmount = 0; uint256 i = 0; do { vestingSchedule = _vestingSchedules[ computeVestingScheduleIdForAddressAndIndex(beneficiary, i) ]; uint256 releaseableAmount = _computeReleasableAmount( vestingSchedule ); vestingSchedule.released += releaseableAmount; totalReleaseableAmount += releaseableAmount; i++; } while (i < vestingSchedulesCountByBeneficiary); _totalSupply -= totalReleaseableAmount; _balances[beneficiary] -= totalReleaseableAmount; require( tokenAddress.transfer(beneficiary, totalReleaseableAmount), "TokenVestingSTEAK: token STEAK rewards transfer to beneficiary not succeeded" ); emit TokensReleased(beneficiary, totalReleaseableAmount); emit Transfer(beneficiary, address(0), totalReleaseableAmount); return true; } function getVestingSchedulesCount() public view returns (uint256) { return _vestingSchedulesIds.length; } function getLastVestingScheduleForBeneficiary( address beneficiary ) external view onlyIfBeneficiaryExists(beneficiary) returns (VestingSchedule memory) { return _vestingSchedules[ computeVestingScheduleIdForAddressAndIndex( beneficiary, _holdersVestingCount[beneficiary] - 1 ) ]; } function computeAllReleasableAmountForBeneficiary( address beneficiary ) external view returns (uint256) { uint256 vestingSchedulesCountByBeneficiary = getVestingSchedulesCountByBeneficiary( beneficiary ); VestingSchedule memory vestingSchedule; uint256 totalReleaseableAmount = 0; uint256 i = 0; do { vestingSchedule = _vestingSchedules[ computeVestingScheduleIdForAddressAndIndex(beneficiary, i) ]; uint256 releaseableAmount = _computeReleasableAmount( vestingSchedule ); totalReleaseableAmount += releaseableAmount; i++; } while (i < vestingSchedulesCountByBeneficiary); return totalReleaseableAmount; } }