function weth() external view returns(address);
function erc20proxy() external view returns(address);
function write(address acoToken, uint256 collateralAmount, address exchangeAddress, bytes calldata exchangeData) external payable;
acoTokenAddress of the ACO token.
collateralAmountAmount of collateral to be deposited.
exchangeAddressAddress to sell the tokens returned by 0x API.
exchangeDataData to be sent to the 0x exchange.