Writer

Introduction
It is a contract to write ACO tokens. Through the data obtained on 0x protocol to market sell ACO tokens is possible to mint and market sell the tokens in only one step.
Code
​ACOWriter.sol​
Address
ACOWriter.sol is deployed at 0xE7597F774fD0a15A617894dc39d45A28B97AFa4f on the Ethereum mainnet. 
Read-Only Functions
weth
function weth() external view returns(address);
The WETH address 0x.
erc20proxy
function erc20proxy() external view returns(address);
Address for 0x ERC20 proxy.
State-Changing Functions
write
function write(address acoToken, uint256 collateralAmount, address exchangeAddress, bytes calldata exchangeData) external payable;
Function to write ACO tokens. The tokens are minted then sold on the 0x exchange. The transaction sender receives the premium.
acoToken Address of the ACO token. 
collateralAmount Amount of collateral to be deposited. 
exchangeAddress Address to sell the tokens returned by 0x API. 
exchangeData Data to be sent to the 0x exchange.
When the asset that should be collateralized is not Ether the allowance to the writer contract on the respective ERC20 asset is required. 
The function only works when the ACO token is NOT expired yet.
ABI
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State-Changing Functions

write

ABI