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| pragma solidity ^0.4.21; | |
| import "../../node_modules/zeppelin-solidity/contracts/token/ERC20/ERC20.sol"; | |
| import "../../node_modules/zeppelin-solidity/contracts/ownership/Ownable.sol"; | |
| import "../webshop/Webshop.sol"; | |
| contract Escrow is Ownable { | |
| enum PaymentStatus { Pending, Completed, Refunded } | |
| event PaymentCreation(uint indexed orderId, address indexed customer, uint value); | |
| event PaymentCompletion(uint indexed orderId, address indexed customer, uint value, PaymentStatus status); | |
| struct Payment { | |
| address customer; | |
| uint value; | |
| PaymentStatus status; | |
| bool refundApproved; | |
| } | |
| mapping(uint => Payment) public payments; | |
| ERC20 public currency; | |
| address public collectionAddress; | |
| Webshop public webshop; | |
| function Escrow(ERC20 _currency, address _collectionAddress) public { | |
| currency = _currency; | |
| collectionAddress = _collectionAddress; | |
| webshop = Webshop(msg.sender); | |
| } | |
| function createPayment(uint _orderId, address _customer, uint _value) external onlyOwner { | |
| payments[_orderId] = Payment(_customer, _value, PaymentStatus.Pending, false); | |
| emit PaymentCreation(_orderId, _customer, _value); | |
| } | |
| function release(uint _orderId) external { | |
| completePayment(_orderId, collectionAddress, PaymentStatus.Completed); | |
| } | |
| function refund(uint _orderId) external { | |
| completePayment(_orderId, msg.sender, PaymentStatus.Refunded); | |
| } | |
| function approveRefund(uint _orderId) external { | |
| require(msg.sender == collectionAddress); | |
| Payment storage payment = payments[_orderId]; | |
| payment.refundApproved = true; | |
| } | |
| function completePayment(uint _orderId, address _receiver, PaymentStatus _status) private { | |
| Payment storage payment = payments[_orderId]; | |
| require(payment.customer == msg.sender); | |
| require(payment.status == PaymentStatus.Pending); | |
| if (_status == PaymentStatus.Refunded) { | |
| require(payment.refundApproved); | |
| } | |
| currency.transfer(_receiver, payment.value); | |
| webshop.changeOrderStatus(_orderId, Webshop.OrderStatus.Completed); | |
| payment.status = _status; | |
| emit PaymentCompletion(_orderId, payment.customer, payment.value, _status); | |
| } | |
| } |
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