You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
50 lines
1.0 KiB
50 lines
1.0 KiB
pragma solidity ^0.4.8;
|
|
|
|
|
|
import '../SafeMath.sol';
|
|
|
|
|
|
/**
|
|
* @title PullPayment
|
|
* @dev Base contract supporting async send for pull payments. Inherit from this
|
|
contract and use asyncSend instead of send.
|
|
*/
|
|
contract PullPayment {
|
|
using SafeMath for uint;
|
|
|
|
mapping(address => uint) public payments;
|
|
uint public totalPayments;
|
|
|
|
/**
|
|
* @dev store sent amount as credit to be pulled, called by payer
|
|
* @param dest address The destination address of the funds
|
|
* @param amount uint The amount to transfer
|
|
*/
|
|
function asyncSend(address dest, uint amount) internal {
|
|
payments[dest] = payments[dest].add(amount);
|
|
totalPayments = totalPayments.add(amount);
|
|
}
|
|
|
|
/**
|
|
@dev withdraw accumulated balance, called by payee.
|
|
*/
|
|
function withdrawPayments() {
|
|
address payee = msg.sender;
|
|
uint payment = payments[payee];
|
|
|
|
if (payment == 0) {
|
|
throw;
|
|
}
|
|
|
|
if (this.balance < payment) {
|
|
throw;
|
|
}
|
|
|
|
totalPayments = totalPayments.sub(payment);
|
|
payments[payee] = 0;
|
|
|
|
if (!payee.send(payment)) {
|
|
throw;
|
|
}
|
|
}
|
|
}
|
|
|