ExchangeHelper

Inherits: IExchangeHelper, ReentrancyGuard

deployed standalone and referenced by ExchangeProxy

do NOT set additional approval to this contract!

Functions

swapWithToken

perform arbitrary swap transaction

function swapWithToken(
    address sourceToken,
    address targetToken,
    uint256 sourceTokenAmount,
    address callee,
    address allowanceTarget,
    bytes calldata data,
    address refundAddress
) external nonReentrant returns (uint256 amountOut, uint256 sourceLeft);

Parameters

Name	Type	Description
`sourceToken`	`address`	source token to pull into this address
`targetToken`	`address`	target token to buy
`sourceTokenAmount`	`uint256`	amount of source token to start the trade
`callee`	`address`	exchange address to call to execute the trade.
`allowanceTarget`	`address`	address for which to set allowance for the trade
`data`	`bytes`	calldata to execute the trade
`refundAddress`	`address`	address that un-used source token goes to

Returns

Name	Type	Description
`amountOut`	`uint256`	quantity of targetToken yielded by swap
`sourceLeft`	`uint256`	quantity of sourceToken left and refunded to refundAddress