Contract Source Code (Solidity)

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Outline

• interface IERC20
•    - function transfer(address, uint256)
•    - function approve(address, uint256)
•    - function balanceOf(address)
•    - function allowance(address, address)
•  contract ApprovalBufferV1 *
•    - function ()
•    - function tradeEthForERC20(
•    - function tradeERC20ForEth(
•    - function tradeERC20ForERC20(
•    - function _revertOnFailure(bool ok)

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/**
 *Submitted for verification at Etherscan.io on 2020-06-03
*/
pragma solidity 0.5.17; // optimization runs: 200, evm version: istanbul
interface IERC20 {
    function transfer(address, uint256) external returns (bool);
    function approve(address, uint256) external returns (bool);
    function balanceOf(address) external view returns (uint256);
    function allowance(address, address) external view returns (uint256);
}
/// @notice This contract serves as an isolated execution environment for
/// performing Eth-to-ERC20, ERC20-to-Eth, and ERC20-to-ERC20 trades in a
/// manner that does not require the initiating account to issue any ERC20
/// approvals. DO NOT approve *this* contract, as anyone will be able to
/// steal the approved tokens. Instead, transfer in the tokens and call
/// `tradeERC20ForEth` or `tradeERC20ForERC20` to swap for the respective
/// asset (obviously, these steps must be performed atomically). For
/// Eth-to-ERC20, simply supply ether with the call to `tradeEthForERC20`.
/// Be sure to include a parameter with the expected amount - this serves
/// as a minimum that the contract must be able to return at the end of
/// the swap, reverting if the received amount is insufficient.
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

• No Contract Security Audit Submitted- Submit Audit Here

[{"payable":true,"stateMutability":"payable","type":"fallback"},{"constant":false,"inputs":[{"internalType":"contract IERC20","name":"tokenToGive","type":"address"},{"internalType":"contract IERC20","name":"tokenToReceive","type":"address"},{"internalType":"uint256","name":"tokenAmountExpected","type":"uint256"},{"internalType":"address payable","name":"target","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"tradeERC20ForERC20","outputs":[{"internalType":"uint256","name":"tokenAmountReceived","type":"uint256"}],"payable":true,"stateMutability":"payable","type":"function"},{"constant":false,"inputs":[{"internalType":"contract IERC20","name":"tokenToGive","type":"address"},{"internalType":"uint256","name":"ethExpected","type":"uint256"},{"internalType":"address","name":"target","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"tradeERC20ForEth","outputs":[{"internalType":"uint256","name":"ethReceived","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"contract IERC20","name":"tokenToReceive","type":"address"},{"internalType":"uint256","name":"tokenAmountExpected","type":"uint256"},{"internalType":"address payable","name":"target","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"tradeEthForERC20","outputs":[{"internalType":"uint256","name":"tokenAmountReceived","type":"uint256"}],"payable":true,"stateMutability":"payable","type":"function"}]

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