tycho-ethereum 0.303.2

Ethereum specific implementation of core tycho traits
Documentation 
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IERC20 {
    function approve(address spender, uint256 amount) external returns (bool);
}

/// @title Token Forwarder
/// @notice Proxies ERC20 transfer and approve calls on behalf of the address at which this
/// contract is injected, allowing the Analyzer to simulate outbound transfers.
/// @dev forwardTransfer uses a low-level call so that tokens which omit the bool return value
/// (e.g. USDT) are handled correctly. forwardApprove uses the typed interface since approve
/// consistently returns bool across tokens.
contract Forwarder {
    /// @notice Forward an ERC20 transfer from this address to a recipient.
    function forwardTransfer(address token, address to, uint256 amount) external returns (bool) {
        (bool ok, bytes memory data) = token.call(
            abi.encodeWithSelector(0xa9059cbb, to, amount)
        );
        return ok && (data.length == 0 || abi.decode(data, (bool)));
    }

    /// @notice Forward an ERC20 approve from this address to a spender.
    function forwardApprove(address token, address spender, uint256 amount) external returns (bool) {
        return IERC20(token).approve(spender, amount);
    }
}