UsdWithdrawalOutputBuilder

UsdWithdrawalOutputBuilder is a concrete IWithdrawalOutputBuilder for applications whose accounts drive denominates a single ERC-20 token. It is a stateless contract fixed to one token at construction; deploy one per token with the factory.

For each account it produces a DelegateCallVoucher that delegate-calls a shared SafeERC20Transfer contract to move balance of the token to the account owner.

Functions

constructor()

constructor(ISafeERC20Transfer safeErc20Transfer, IERC20 usd)

Parameters

Name	Type	Description
safeErc20Transfer	ISafeERC20Transfer	The shared safe-transfer contract used as the delegate-call destination
usd	IERC20	The ERC-20 token this builder denominates withdrawals in

token()

function token() external view override returns (IERC20)

Get the ERC-20 token used to generate withdrawal outputs.

Return Values

Name	Type	Description
[0]	IERC20	The configured token

buildWithdrawalOutput()

function buildWithdrawalOutput(address, bytes calldata account)
    external
    view
    override
    returns (bytes memory output)

Decode account as (address user, uint256 balance) and return a DelegateCallVoucher that, when executed by the application, calls SafeERC20Transfer.safeTransfer(token, user, balance).

Parameters

Name	Type	Description
account	bytes	The account, decoded via LibUsdAccount.decode into (user, balance)

Return Values

Name	Type	Description
output	bytes	An ABI-encoded DelegateCallVoucher(destination, payload) where destination is the SafeERC20Transfer contract and payload is safeTransfer(token, user, balance)

Raises AccountTooShort if the account cannot be decoded.