- Contract name:
- EtomicSwap
- Optimization enabled
- false
- Compiler version
- v0.5.17+commit.d19bba13
- EVM Version
- default
- Verified at
- 2020-12-24T09:48:33.396444Z
Contract source code
pragma solidity ^0.5.0;
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address who) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
function transfer(address to, uint256 value) external returns (bool);
function approve(address spender, uint256 value) external returns (bool);
function transferFrom(address from, address to, uint256 value) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract EtomicSwap {
enum PaymentState {
Uninitialized,
PaymentSent,
ReceivedSpent,
SenderRefunded
}
struct Payment {
bytes20 paymentHash;
uint64 lockTime;
PaymentState state;
}
mapping (bytes32 => Payment) public payments;
event PaymentSent(bytes32 id);
event ReceiverSpent(bytes32 id, bytes32 secret);
event SenderRefunded(bytes32 id);
constructor() public { }
function ethPayment(
bytes32 _id,
address _receiver,
bytes20 _secretHash,
uint64 _lockTime
) external payable {
require(_receiver != address(0) && msg.value > 0 && payments[_id].state == PaymentState.Uninitialized);
bytes20 paymentHash = ripemd160(abi.encodePacked(
_receiver,
msg.sender,
_secretHash,
address(0),
msg.value
));
payments[_id] = Payment(
paymentHash,
_lockTime,
PaymentState.PaymentSent
);
emit PaymentSent(_id);
}
function erc20Payment(
bytes32 _id,
uint256 _amount,
address _tokenAddress,
address _receiver,
bytes20 _secretHash,
uint64 _lockTime
) external payable {
require(_receiver != address(0) && _amount > 0 && payments[_id].state == PaymentState.Uninitialized);
bytes20 paymentHash = ripemd160(abi.encodePacked(
_receiver,
msg.sender,
_secretHash,
_tokenAddress,
_amount
));
payments[_id] = Payment(
paymentHash,
_lockTime,
PaymentState.PaymentSent
);
IERC20 token = IERC20(_tokenAddress);
require(token.transferFrom(msg.sender, address(this), _amount));
emit PaymentSent(_id);
}
function receiverSpend(
bytes32 _id,
uint256 _amount,
bytes32 _secret,
address _tokenAddress,
address _sender
) external {
require(payments[_id].state == PaymentState.PaymentSent);
bytes20 paymentHash = ripemd160(abi.encodePacked(
msg.sender,
_sender,
ripemd160(abi.encodePacked(sha256(abi.encodePacked(_secret)))),
_tokenAddress,
_amount
));
require(paymentHash == payments[_id].paymentHash);
payments[_id].state = PaymentState.ReceivedSpent;
if (_tokenAddress == address(0)) {
msg.sender.transfer(_amount);
} else {
IERC20 token = IERC20(_tokenAddress);
require(token.transfer(msg.sender, _amount));
}
emit ReceiverSpent(_id, _secret);
}
function senderRefund(
bytes32 _id,
uint256 _amount,
bytes20 _paymentHash,
address _tokenAddress,
address _receiver
) external {
require(payments[_id].state == PaymentState.PaymentSent);
bytes20 paymentHash = ripemd160(abi.encodePacked(
_receiver,
msg.sender,
_paymentHash,
_tokenAddress,
_amount
));
require(paymentHash == payments[_id].paymentHash && now >= payments[_id].lockTime);
payments[_id].state = PaymentState.SenderRefunded;
if (_tokenAddress == address(0)) {
msg.sender.transfer(_amount);
} else {
IERC20 token = IERC20(_tokenAddress);
require(token.transfer(msg.sender, _amount));
}
emit SenderRefunded(_id);
}
}
Contract ABI
[{"type":"constructor","stateMutability":"nonpayable","payable":false,"inputs":[]},{"type":"event","name":"PaymentSent","inputs":[{"type":"bytes32","name":"id","internalType":"bytes32","indexed":false}],"anonymous":false},{"type":"event","name":"ReceiverSpent","inputs":[{"type":"bytes32","name":"id","internalType":"bytes32","indexed":false},{"type":"bytes32","name":"secret","internalType":"bytes32","indexed":false}],"anonymous":false},{"type":"event","name":"SenderRefunded","inputs":[{"type":"bytes32","name":"id","internalType":"bytes32","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"payable","payable":true,"outputs":[],"name":"erc20Payment","inputs":[{"type":"bytes32","name":"_id","internalType":"bytes32"},{"type":"uint256","name":"_amount","internalType":"uint256"},{"type":"address","name":"_tokenAddress","internalType":"address"},{"type":"address","name":"_receiver","internalType":"address"},{"type":"bytes20","name":"_secretHash","internalType":"bytes20"},{"type":"uint64","name":"_lockTime","internalType":"uint64"}],"constant":false},{"type":"function","stateMutability":"payable","payable":true,"outputs":[],"name":"ethPayment","inputs":[{"type":"bytes32","name":"_id","internalType":"bytes32"},{"type":"address","name":"_receiver","internalType":"address"},{"type":"bytes20","name":"_secretHash","internalType":"bytes20"},{"type":"uint64","name":"_lockTime","internalType":"uint64"}],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"bytes20","name":"paymentHash","internalType":"bytes20"},{"type":"uint64","name":"lockTime","internalType":"uint64"},{"type":"uint8","name":"state","internalType":"enum EtomicSwap.PaymentState"}],"name":"payments","inputs":[{"type":"bytes32","name":"","internalType":"bytes32"}],"constant":true},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"receiverSpend","inputs":[{"type":"bytes32","name":"_id","internalType":"bytes32"},{"type":"uint256","name":"_amount","internalType":"uint256"},{"type":"bytes32","name":"_secret","internalType":"bytes32"},{"type":"address","name":"_tokenAddress","internalType":"address"},{"type":"address","name":"_sender","internalType":"address"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"senderRefund","inputs":[{"type":"bytes32","name":"_id","internalType":"bytes32"},{"type":"uint256","name":"_amount","internalType":"uint256"},{"type":"bytes20","name":"_paymentHash","internalType":"bytes20"},{"type":"address","name":"_tokenAddress","internalType":"address"},{"type":"address","name":"_receiver","internalType":"address"}],"constant":false}]
Deployed ByteCode
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