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Make SafeMath a library

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This commit is contained in:
Manuel Araoz
2017-04-06 16:43:47 -03:00
parent 5881429952
commit 4fad1505c7
7 changed files with 31 additions and 27 deletions
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10
contracts/payment/PullPayment.sol
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@ -9,14 +9,16 @@ import '../SafeMath.sol';
* Base contract supporting async send for pull payments.
* Inherit from this contract and use asyncSend instead of send.
*/
contract PullPayment is SafeMath {
contract PullPayment {
using SafeMath for uint;
mapping(address => uint) public payments;
uint public totalPayments;
// store sent amount as credit to be pulled, called by payer
function asyncSend(address dest, uint amount) internal {
payments[dest] = safeAdd(payments[dest], amount);
totalPayments = safeAdd(totalPayments, amount);
payments[dest] = payments[dest].safeAdd(amount);
totalPayments = totalPayments.safeAdd(amount);
}
// withdraw accumulated balance, called by payee
@ -32,7 +34,7 @@ contract PullPayment is SafeMath {
throw;
}
totalPayments = safeSub(totalPayments, payment);
totalPayments = totalPayments.safeSub(payment);
payments[payee] = 0;
if (!payee.send(payment)) {