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openzeppelin-contracts/contracts/payment/PullPayment.sol

42 lines
1014 B

pragma solidity ^0.4.24;
import "./Escrow.sol";
/**
* @title PullPayment
* @dev Base contract supporting async send for pull payments. Inherit from this
* contract and use asyncTransfer instead of send or transfer.
*/
contract PullPayment {
Escrow private escrow;
constructor() public {
escrow = new Escrow();
}
/**
* @dev Withdraw accumulated balance, called by payee.
*/
function withdrawPayments() public {
address payee = msg.sender;
escrow.withdraw(payee);
}
/**
* @dev Returns the credit owed to an address.
* @param _dest The creditor's address.
*/
function payments(address _dest) public view returns (uint256) {
return escrow.depositsOf(_dest);
}
/**
* @dev Called by the payer to store the sent amount as credit to be pulled.
* @param _dest The destination address of the funds.
* @param _amount The amount to transfer.
*/
function asyncTransfer(address _dest, uint256 _amount) internal {
escrow.deposit.value(_amount)(_dest);
}
}