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<html>
<head>
<link rel="icon" href="assets/favicon.svg" />
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script src="assets/ethers-5.5.2.umd.min.js" type="application/javascript"></script>
<script src="assets/detect-provider.min.js"></script>
<script src="assets/attention.js"></script>
<script src="assets/codec-b64.js"></script>
<link rel="stylesheet" href="assets/bulma.min.css">
<link rel="stylesheet" href="assets/attention.css">
<title>Starter Money</title>
</head>
<body>
<body style="margin: 0 auto; width: 380px">
<p>Your Address:<br><u id="signerAddress"></u></p>
<p>The Maker's Address:<br><u id="makerAddr"></u></p>
<p>The Maker Wants from You:<br><u id="toMaker"></u></p>
<p>The Maker Pays to You:<br><u id="toTaker"></u></p>
<p>The Order Expires At:<br><u id="expireDate"></u></p>
<p>Order Status: <b id="status"></b></p>
<center id="takeDiv" style="display: none"><br><button class="button is-info" onclick="takeOrder()"
>Take This Order</button></center>
<center id="cancelDiv" style="display: none"><br><button class="button is-info" onclick="cancelOrder()"
>Cancel This Order</button></center>
</div>
<script>
const MaxAmount = "0x0FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
const SEP206Address = "0x0000000000000000000000000000000000002711"
// o=ver8,coinsToMaker256,coinsToTaker256,dueTime80,r256,s256,v8
const CoinTypeToMakerStart = 1
const AmountToMakerStart = 1+20
const CoinTypeToTakerStart = 1+20+12
const AmountToTakerStart = 1+20+12+20
const DueTimeStart = 1+20+12+20+12
const SigRStart = 1+20+12+20+12+10
const SigSStart = 1+20+12+20+12+10+32
const SigVStart = 1+20+12+20+12+10+32+32
const SEP20ABI = [
"function symbol() view returns (string)",
"function decimals() view returns (uint8)",
"function balanceOf(address account) external view returns (uint256)",
"function allowance(address owner, address spender) external view returns (uint256)",
"function approve(address spender, uint256 amount) external returns (bool)",
]
const ExHubAddress = "0x351264f24820C91317024B7748C98CA63d6a2781"
const ExHubABI = [
"function exchange(uint256 coinsToMaker, uint256 coinsToTaker, uint256 takerAddr_dueTime80_v8, bytes32 r, bytes32 s) payable external",
"function isReplay(address makerAddr, uint dueTime) external view returns (bool)",
"function addNewDueTime(uint newDueTime) external",
"function getSigner(uint256 coinsToMaker, uint256 coinsToTaker, uint256 campaignID, uint256 takerAddr_dueTime80_v8, bytes32 r, bytes32 s) public view returns (address)",
]
async function connect() {
if (typeof window.ethereum === 'undefined') {
if (typeof window.web3 !== 'undefined') {
window.ethereum = window.web3;
} else if (typeof window.TPJSBrigeClient !== 'undefined') {
window.ethereum = window.TPJSBrigeClient;
} else if (typeof window.imToken !== 'undefined') {
window.ethereum = window.imToken;
} else {
const provider = await detectEthereumProvider();
if (provider) {
window.ethereum = provider;
} else if(IsPC()) {
alert("Your browser has not installed a wallet extension (like MetaMask).");
} else {
alert("Please open this page inside a mobile wallet App.");
}
}
}
window.accounts = await window.ethereum.request({method: 'eth_requestAccounts'});
if (window.accounts.length == 0) {
window.AlertDlg = new Attention.Alert({title: "Warning",
content: "Cannot connect to wallet"});
return false;
}
return true;
}
function timestamp2string(timestamp) {
var t = new Date()
t.setTime(timestamp)
var s = t.toLocaleString("en-US", {hour12: false})
return s.slice(0, s.length-3).replace(" 24:", " 00:")
}
async function init() {
if(!await connect()) {return;}
const provider = new ethers.providers.Web3Provider(window.ethereum);
const signer = provider.getSigner();
const myAddr = await signer.getAddress();
document.getElementById("signerAddress").innerText = myAddr;
const url = new URL(location.href);
const orderB64 = url.searchParams.get("o");
if(!orderB64) {return;}
const u8arr = base64DecToArr(orderB64);
var order={}
order.coinTypeToMaker = ethers.utils.getAddress(ethers.utils.hexlify(u8arr.slice(CoinTypeToMakerStart, AmountToMakerStart)))
order.amountToMakerBN = ethers.BigNumber.from(ethers.utils.hexlify(u8arr.slice(AmountToMakerStart, CoinTypeToTakerStart)))
order.coinsToMaker = ethers.utils.hexlify(u8arr.slice(CoinTypeToMakerStart, CoinTypeToTakerStart))
order.coinTypeToTaker = ethers.utils.getAddress(ethers.utils.hexlify(u8arr.slice(CoinTypeToTakerStart, AmountToTakerStart)))
order.amountToTakerBN = ethers.BigNumber.from(ethers.utils.hexlify(u8arr.slice(AmountToTakerStart, DueTimeStart)))
order.coinsToTaker = ethers.utils.hexlify(u8arr.slice(CoinTypeToTakerStart, DueTimeStart))
order.dueTime = ethers.BigNumber.from(ethers.utils.hexlify(u8arr.slice(DueTimeStart, SigRStart)))
order.r = ethers.BigNumber.from(ethers.utils.hexlify(u8arr.slice(SigRStart, SigSStart))).toHexString()
order.s = ethers.BigNumber.from(ethers.utils.hexlify(u8arr.slice(SigSStart, SigVStart))).toHexString()
order.v = ethers.BigNumber.from(ethers.utils.hexlify(u8arr.slice(SigVStart)))
window.order = order
const sep20ToMaker = new ethers.Contract(order.coinTypeToMaker, SEP20ABI, provider)
order.symbolToMaker = await sep20ToMaker.symbol()
const decimalsToMaker = await sep20ToMaker.decimals()
order.amountToMaker = ethers.utils.formatUnits(order.amountToMakerBN, decimalsToMaker)*1.0
const toMaker = `${order.amountToMaker} <a target="_blank" href="https://smartscan.cash/address/${order.coinTypeToMaker}">${order.symbolToMaker}</a>`
document.getElementById("toMaker").innerHTML = toMaker
const sep20ToTaker = new ethers.Contract(order.coinTypeToTaker, SEP20ABI, provider)
const symbolToTaker = await sep20ToTaker.symbol()
const decimalsToTaker = await sep20ToTaker.decimals()
order.amountToTaker = ethers.utils.formatUnits(order.amountToTakerBN, decimalsToTaker)*1.0
const toTaker = `${order.amountToTaker} <a target="_blank" href="https://smartscan.cash/address/${order.coinTypeToTaker}">${symbolToTaker}</a>`
document.getElementById("toTaker").innerHTML = toTaker
const dueTime = order.dueTime.div(1000*1000*1000).toNumber() //picoseconds to microseconds
document.getElementById("expireDate").innerText = timestamp2string(dueTime)
if(dueTime < Date.now()) {
document.getElementById("status").innerText = "Expired"
return
}
const exhubContract = new ethers.Contract(ExHubAddress, ExHubABI, provider).connect(signer);
const dueTime80_v8 = order.dueTime.mul(256).add(order.v)
//const gas = await exhubContract.estimateGas.exchange(order.coinsToMaker, order.coinsToTaker, dueTime80_v8, order.r, order.s);
//console.log(gas)
order.makerAddr = await exhubContract.getSigner(order.coinsToMaker, order.coinsToTaker, 0,
dueTime80_v8, order.r, order.s);
document.getElementById("makerAddr").innerText = order.makerAddr
var alreadyTaken = await exhubContract.isReplay(order.makerAddr, order.dueTime);
if(alreadyTaken) {
document.getElementById("status").innerText = "Already Dealt"
return
}
const balanceBN = await sep20ToTaker.balanceOf(order.makerAddr)
if(balanceBN.lt(order.amountToTakerBN)) {
document.getElementById("status").innerText = "Maker's Balance Is Not Enough"
return
}
document.getElementById("status").innerText = "Not Dealt"
if(order.makerAddr == myAddr) {
document.getElementById("cancelDiv").style.display = "block"
} else {
document.getElementById("takeDiv").style.display = "block"
}
}
async function cancelOrder() {
const provider = new ethers.providers.Web3Provider(window.ethereum);
const signer = provider.getSigner();
const exhubContract = new ethers.Contract(ExHubAddress, ExHubABI, provider).connect(signer);
await exhubContract.addNewDueTime(order.dueTime)
}
async function takeOrder() {
const provider = new ethers.providers.Web3Provider(window.ethereum);
const signer = provider.getSigner();
const myAddr = await signer.getAddress();
const network = await provider.getNetwork();
if(network.chainId != 10000) {
window.AlertDlg = new Attention.Alert({title: "Incorrect Network",
content: "You are not connecting to the smartBCH chain."});
return
}
const dueTime = order.dueTime.div(1000*1000*1000).toNumber() //picoseconds to microseconds
if(dueTime < Date.now()) {
window.ERR = {title: "Order Expired",
content: "Sorry, but this order was expired at "+timestamp2string(dueTime)};
window.AlertDlg = new Attention.Alert(window.ERR);
return false;
}
const sep20ToMaker = new ethers.Contract(order.coinTypeToMaker, SEP20ABI, provider).connect(signer)
try {
const decimals = await sep20ToMaker.decimals()
const balanceAmt = await sep20ToMaker.balanceOf(myAddr)
const allowanceAmt = await sep20ToMaker.allowance(myAddr, ExHubAddress)
var balance = ethers.utils.formatUnits(balanceAmt, decimals)*1.0
var allowance = ethers.utils.formatUnits(allowanceAmt, decimals)*1.0
} catch(e) {
console.log(e)
window.AlertDlg = new Attention.Alert({title: "Non-SEP20 Address",
content: `${order.coinTypeToMaker} is a valid address but not an SEP20 address`});
return
}
if(balance < order.amountToMaker) {
window.AlertDlg = new Attention.Alert({title: "Balance Not Enough",
content: `Your ${order.symbolToMaker} balance is ${balance}, less than ${order.amountToMaker}`});
return
}
if(order.coinTypeToMaker != SEP206Address && allowance < order.amountToMaker) {
new Attention.Confirm({title: `Approve ${order.symbolToMaker}`,
content: `You did not approve enough ${order.symbolToMaker} to legacy.orders.cash, do you want to approve now? After sending the approving transaction, you can retry.`,
onConfirm(component) {
sep20ToMaker.approve(ExHubAddress, MaxAmount)
},
onCancel(component) {}});
return
}
const exhubContract = new ethers.Contract(ExHubAddress, ExHubABI, provider).connect(signer);
const dueTime80_v8 = order.dueTime.mul(256).add(order.v)
var tx;
if(order.coinTypeToMaker == SEP206Address) {
tx = await exhubContract.exchange(order.coinsToMaker, order.coinsToTaker, dueTime80_v8, order.r, order.s, {value: order.amountToMakerBN.toString()});
} else {
tx = await exhubContract.exchange(order.coinsToMaker, order.coinsToTaker, dueTime80_v8, order.r, order.s);
}
const receipt = await tx.wait();
console.log(receipt);
return false;
}
window.onload = init;
document.onclick = function() {
if(window.AlertDlg) {
window.AlertDlg.destroy();
delete window.AlertDlg;
}
}
</script>
<iframe id="srcIframe" src="" style="display: none" hidden></iframe>
</body>
</html>