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rp.html
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rp.html
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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="Crypto red packet with password to open, protected by zk-proof.">
<title>Red Packet 🧧</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/font/bootstrap-icons.css">
<script src="/static/js/blockchains.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/vue.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/ethers.umd.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/build/snarkjs.min.js"></script>
<style>
body {
height: 100vh;
background-size: cover;
background-image: linear-gradient(30deg, #9943c7 0%, #C850C0 20%, #ffa770 100%);
}
.red-packet {
width: 328px;
color: #ebcc9a;
}
.red-packet .card {
overflow: hidden;
height: 520px;
position: relative;
border-radius: 16px;
background-color: #f35542;
}
.red-packet .card-body {
background-size: cover;
}
.golden-border {
border: 4px solid #ebcc9a;
}
.opened {
position: absolute;
left: 50%;
top: 20px;
margin-left: -140px;
width: 280px;
height: 370px;
color: #905923;
background-color: #f5f1ee;
border-top-left-radius: 16px;
border-top-right-radius: 16px;
}
.opened .coin-logo>img {
width: 48px;
height: 48px;
}
.triangle {
position: absolute;
top: 330px;
width: 0;
height: 0;
border-bottom-width: 0;
}
.triangle-1 {
left: 0;
border-top: 60px solid transparent;
border-left: 168px solid #ebcc9a;
border-right: 168px solid transparent;
}
.triangle-1-cover {
left: 0;
top: 334px;
border-top: 60px solid transparent;
border-left: 168px solid #f35542;
border-right: 168px solid transparent;
}
.triangle-2 {
right: 0;
border-top: 60px solid transparent;
border-left: 168px solid transparent;
border-right: 168px solid #ebcc9a;
}
.triangle-2-cover {
right: 0;
top: 334px;
border-top: 60px solid transparent;
border-left: 168px solid transparent;
border-right: 168px solid #f35542;
}
.rectangle-bottom {
position: absolute;
left: 0;
top: 390px;
width: 330px;
height: 300px;
background-color: #f35542;
}
.circle {
position: absolute;
left: 50%;
top: 330px;
width: 100px;
height: 100px;
border-radius: 50px;
margin-left: -50px;
background-color: #ebcc9a;
cursor: pointer;
}
.can-open:hover {
box-shadow: 0 0 0.2rem 0.5rem rgba(235, 204, 154, 0.5);
transform: scale(1.1);
transition: all 0.3s;
}
.circle>img {
width: 60px;
height: 60px;
margin: 20px;
}
.fs-7 {
font-size: 0.875rem;
}
a {
text-decoration: none;
}
</style>
<!-- Google tag (gtag.js) -->
<script async src="https://www.googletagmanager.com/gtag/js?id=G-G71EH5JJVS"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag() { dataLayer.push(arguments); }
gtag('js', new Date());
gtag('config', 'G-G71EH5JJVS');
</script>
<script>
class Token {
#address;
#symbol;
#decimals;
constructor(address, symbol, decimals) {
this.#address = address;
this.#symbol = symbol;
this.#decimals = decimals;
}
get address() {
return this.#address;
}
get symbol() {
return this.#symbol;
}
get decimals() {
return this.#decimals;
}
}
class RedPacket {
chain;
id;
// properties for contract storage:
passcodeHash; // passcode hash of red packet
amount; // amount of token
amountLeft; // mutable: balance of token
creator; // creator address
token; // token address
condition; // condition contract address
total; // total number of address
totalLeft; // mutable: current number of address that can withdraw
bonusType; // 0=identical, 1=random
// private:
#rpParams = {};
#sig;
#sigValid = false;
#preview = false;
constructor() {
const urlSearchParams = new URLSearchParams(window.location.search);
this.chain = parseInt(urlSearchParams.get('chain'));
this.id = parseInt(urlSearchParams.get('id'));
// verify signature of rpXxx params:
for (let [k, v] of urlSearchParams) {
if (k.startsWith('rp')) {
console.log(k, '=', v);
this.#rpParams[k] = v;
} else if (k === 'sig') {
this.#sig = v;
} else if (k == 'preview') {
this.#preview = v === 'true';
}
}
}
setRedPacketInfo(rp) {
this.passcodeHash = rp[0]; // BN
this.amount = rp[1]; // BN
this.amountLeft = rp[2]; // BN
this.creator = rp[3] // address
this.token = rp[4]; // address
this.condition = rp[5]; // address
this.total = rp[6]; // int
this.totalLeft = rp[7]; // int
this.bonusType = rp[8]; // int
}
get redPacketAddress() {
return '0xFe6667986f58F2F7ed1e7C17Cee3951d8ABb717f';
}
get redPacketABI() {
return '[{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"redPacketId","type":"uint256"},{"indexed":true,"internalType":"address","name":"creator","type":"address"},{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint32","name":"total","type":"uint32"},{"indexed":false,"internalType":"enum RedPacket.BonusType","name":"bonusType","type":"uint8"}],"name":"Create","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"redPacketId","type":"uint256"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"bonus","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"bonusLeft","type":"uint256"},{"indexed":false,"internalType":"uint32","name":"totalLeft","type":"uint32"}],"name":"Withdraw","type":"event"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint32","name":"total","type":"uint32"},{"internalType":"enum RedPacket.BonusType","name":"bonusType","type":"uint8"},{"internalType":"uint256","name":"passcodeHash","type":"uint256"},{"internalType":"address","name":"condition","type":"address"}],"name":"create","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"}],"name":"getRedPacket","outputs":[{"components":[{"internalType":"uint256","name":"passcodeHash","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"amountLeft","type":"uint256"},{"internalType":"address","name":"creator","type":"address"},{"internalType":"address","name":"token","type":"address"},{"internalType":"address","name":"condition","type":"address"},{"internalType":"uint32","name":"total","type":"uint32"},{"internalType":"uint32","name":"totalLeft","type":"uint32"},{"internalType":"enum RedPacket.BonusType","name":"bonusType","type":"uint8"}],"internalType":"struct RedPacket.RedPacketInfo","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"address","name":"addr","type":"address"}],"name":"isOpened","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"uint256[]","name":"proof","type":"uint256[]"}],"name":"open","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256[2]","name":"a","type":"uint256[2]"},{"internalType":"uint256[2][2]","name":"b","type":"uint256[2][2]"},{"internalType":"uint256[2]","name":"c","type":"uint256[2]"},{"internalType":"uint256[2]","name":"input","type":"uint256[2]"}],"name":"verifyProof","outputs":[{"internalType":"bool","name":"r","type":"bool"}],"stateMutability":"view","type":"function"}]';
}
get createTopic() {
return '0xf526b6d6ff0fac13f7e16aeea0f08bc8f0789c188dc429de0ea4b56bc06e82c6';
}
get withdrawTopic() {
return '0x98ae10cde2519298a29f9d069abdf1971fa4cceb70f49a01994333fe70c7cf10';
}
get conditionABI() {
return '[{"inputs":[{"internalType":"address","name":"redpacketContract","type":"address"},{"internalType":"uint256","name":"redpacketId","type":"uint256"},{"internalType":"address","name":"operator","type":"address"}],"name":"check","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"}]';
}
get erc20ABI() {
return '[{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]';
}
getRpParamsMessageForSign() {
let params = ['chain=' + this.chain, 'id=' + this.id];
for (let k in this.#rpParams) {
if (k.startsWith('rp')) {
params.push(k + '=' + this.#rpParams[k]);
}
}
params.sort();
return params.join('&');
}
verifyParams() {
if (!this.#sig) {
console.log('skip verify params for no sig found.');
} else {
console.log('verify params with address: ' + this.creator);
try {
let message = this.getRpParamsMessageForSign();
console.log('verifyParams: message = ' + message);
let recoveredAddress = ethers.utils.verifyMessage(message, this.#sig);
console.log('verifyParams: recovered = ' + recoveredAddress);
this.#sigValid = recoveredAddress.toLowerCase() === this.creator.toLowerCase();
console.log('verify: ' + this.#sigValid);
if (!this.#sigValid) {
throw 'invalid parameter sig'
}
} catch (err) {
console.error('failed verify params signature.', err);
}
}
}
get preview() {
return this.#preview;
}
getRpCreator(creatorAddress) {
return this.getRpParam('rpCreator', this.abbrAddress(creatorAddress));
}
getRpGreeting() {
return this.getRpParam('rpGreeting');
}
getRpCoverImage() {
return this.getRpParam('rpCoverImage');
}
getRpBgImage() {
return this.getRpParam('rpBgImage');
}
getRpOpenImage() {
return this.getRpParam('rpOpenImage');
}
getRpIconImage() {
return this.getRpParam('rpIconImage');
}
getRpDisplayOpenInfo(display = true) {
let p = this.getRpParam('rpDisplayOpenInfo');
if (p === undefined || p === null) {
return display;
}
return p !== 'false';
}
getRpParams() {
return this.#rpParams;
}
getRpParam(k, defaultValue) {
if (this.#sigValid || this.preview) {
let v = this.#rpParams[k];
if (v === undefined || v === null) {
return defaultValue;
}
return v;
}
return defaultValue;
}
#BN_1K = ethers.utils.parseUnits('1000', 0);
#BN_1M = ethers.utils.parseUnits('1000000', 0);
#BN_1B = ethers.utils.parseUnits('1000000000', 0);
#intBN(bn, decimals) {
for (let i = 0; i < decimals; i++) {
bn = bn.div(10);
}
return bn;
}
abbrBN(bn, decimals, precision = 5) {
if (this.#intBN(bn, decimals).lt(this.#BN_1K)) {
let s = ethers.utils.formatUnits(bn, decimals);
return s.substr(0, 6);
}
bn = bn.div(1000);
if (this.#intBN(bn, decimals).lt(this.#BN_1K)) {
let s = ethers.utils.formatUnits(bn, decimals);
return s.substr(0, 6) + 'K';
}
bn = bn.div(1000);
if (this.#intBN(bn, decimals).lt(this.#BN_1K)) {
let s = ethers.utils.formatUnits(bn, decimals);
return s.substr(0, 6) + 'M';
}
bn = bn.div(1000);
if (this.#intBN(bn, decimals).lt(this.#BN_1K)) {
let s = ethers.utils.formatUnits(bn, decimals);
return s.substr(0, 6) + 'B';
}
bn = bn.div(1000);
let s = ethers.utils.formatUnits(bn, decimals);
let n = s.indexOf('.');
if (n < 0) {
return s + 'T';
}
return s.substring(0, n) + 'T';
}
abbrAddress(address, chars = 4) {
let addr = ethers.utils.getAddress(address);
return addr.substring(0, chars + 2) + '...' + addr.substring(addr.length - chars);
}
}
window.redPacket = new RedPacket();
async function prove(addrBN, secretBN) {
return await snarkjs.groth16.fullProve({ addr: addrBN.toString(), secret: secretBN.toString() }, "passcode_js/passcode.wasm", "passcode_js/passcode_0001.zkey");
}
function keccak(str) {
let arr = new TextEncoder().encode(str);
return ethers.utils.keccak256(arr);
}
function toBN(s, decimals) {
try {
return ethers.utils.parseUnits(s.trim(), decimals);
} catch (e) {
return null;
}
}
function isValidBN(s, decimals) {
let bn = toBN(s, decimals);
return bn !== null && !bn.isZero() && !bn.isNegative();
}
function isValidAddress(s) {
try {
ethers.utils.getAddress(s);
return true;
} catch (e) {
return false;
}
}
function getRpcProvider(rpcUrl) {
return new ethers.providers.JsonRpcProvider({
url: rpcUrl,
timeout: 20000
});
}
function getWeb3Provider() {
if (!window.web3Provider) {
if (!window.ethereum) {
console.error("there is no web3 provider.");
return null;
}
window.web3Provider = new ethers.providers.Web3Provider(window.ethereum, "any");
}
return window.web3Provider;
}
function showAlert(title, message) {
let m = $('#alertModal');
m.find('.x-title').text(title);
m.find('.x-message').text(message);
let myModal = new bootstrap.Modal(m.get(0), { backdrop: 'static', keyboard: false });
myModal.show();
}
function showInfo(title, message) {
let m = $('#infoModal');
m.find('.x-title').text(title);
if (message.startsWith('<')) {
m.find('.x-message').html(message);
} else {
m.find('.x-message').text(message);
}
let myModal = new bootstrap.Modal(m.get(0), { backdrop: 'static', keyboard: false });
myModal.show();
}
function showInput(onOkClicked) {
let
m = $('#inputModal'),
ok = m.find('button.btn-primary');
$('#inputPassword').val('');
let myModal = new bootstrap.Modal(m.get(0), { backdrop: 'static', keyboard: false });
ok.click(function () {
myModal.hide();
ok.off('click')
setTimeout(function () {
onOkClicked && onOkClicked($('#inputPassword').val());
}, 500);
});
myModal.show();
}
function showLoading(title, message) {
let m = $('#loadingModal');
let myModal = new bootstrap.Modal(m.get(0), { backdrop: 'static', keyboard: false });
let obj = {
setTitle: (t) => {
m.find('.x-title').text(t);
},
setMessage: (t) => {
m.find('.x-message').text(t);
},
close: () => {
setTimeout(function () {
myModal.hide();
}, 500);
}
}
obj.setTitle(title);
obj.setMessage(message);
myModal.show();
return obj;
}
function translateError(err) {
window.err = err;
if (typeof (err) === 'string') {
return err;
}
if (err.error && err.error.code && err.error.message) {
return `Error (${err.error.code}): ${err.error.message}`;
}
if (err.code && err.message) {
return `Error (${err.code}): ${err.message}`;
}
return err.message || err.toString();
}
function init() {
console.log('init vue...');
window.vm = new Vue({
el: '#vm',
data: {
account: null,
chainId: 0,
loaded: false,
loading: false,
opened: false,
bonusBN: null,
toAddress: '',
password: '',
token: null,
redPacket: redPacket,
version: 0 // just used to update computed property
},
computed: {
creatorName: function () {
this.version;
let addr = this.redPacket.creator;
if (!addr) {
return '';
}
return this.redPacket.getRpCreator(addr);
},
greeting: function () {
this.version;
return this.redPacket.getRpGreeting() || 'Best Wishes!';
},
amount: function () {
this.version;
if (this.token) {
return this.redPacket.abbrBN(this.redPacket.amount, this.token.decimals);
}
},
amountLeft: function () {
this.version;
if (this.token) {
return this.redPacket.abbrBN(this.redPacket.amountLeft, this.token.decimals);
}
},
bonus: function () {
this.version;
if (this.token && this.bonusBN) {
return this.redPacket.abbrBN(this.bonusBN, this.token.decimals);
}
},
tokenIconUrl: function () {
this.version;
let icon = this.redPacket.getRpIconImage();
if (icon) {
return icon;
}
if (this.token && this.token.address) {
let ch = window.BLOCKCHAINS[this.redPacket.chain];
if (ch) {
t = ch.tokens.find(t => t.address === this.token.address.toLowerCase());
if (t) {
return t.icon;
}
}
}
return '/static/icons/default.svg';
},
displayOpenInfo: function () {
this.version;
return this.redPacket.getRpDisplayOpenInfo();
},
coverImage: function () {
this.version;
let i = this.redPacket.getRpCoverImage();
if (i) {
return 'url(' + i + ')';
}
return 'none';
},
openImage: function () {
this.version;
let i = this.redPacket.getRpOpenImage();
if (i) {
return i;
}
return '/static/img/open-1.svg';
},
canCustomize: function () {
this.version;
if (this.account && this.redPacket.creator && this.account.toLowerCase() === this.redPacket.creator.toLowerCase()) {
return true;
}
return false;
},
invalid: function () {
return isNaN(this.redPacket.chain) || isNaN(this.redPacket.id);
},
ready: function () {
return this.account && this.chainId === this.redPacket.chain;
},
networkName: function () {
if (this.account) {
if (this.chainId === this.redPacket.chain) {
let c = window.BLOCKCHAINS[this.chainId];
if (c) {
return c.name;
}
}
return 'Unsupported Network (0x' + this.chainId.toString(16) + ')';
}
return 'Not Connected';
},
correctNetworkName: function () {
let c = window.BLOCKCHAINS[this.redPacket.chain];
if (c) {
return c.name;
}
return 'Chain (0x' + this.redPacket.chain.toString(16) + ')';
}
},
methods: {
loadRedPacket: async function () {
if (this.loaded) {
return;
}
let useInjectedProvider = this.chainId === this.redPacket.chain;
console.log('start load redpacket...');
this.loading = true;
try {
let
provider = useInjectedProvider ? window.getWeb3Provider() : getRpcProvider(window.BLOCKCHAINS[this.redPacket.chain].rpc),
rpContract = new ethers.Contract(this.redPacket.redPacketAddress, this.redPacket.redPacketABI, useInjectedProvider ? provider.getSigner() : provider),
rp = await rpContract.getRedPacket(this.redPacket.id);
console.log('loaded red packet:', rp);
this.redPacket.setRedPacketInfo(rp);
this.redPacket.verifyParams();
this.version++;
if (this.redPacket.token.toLowerCase() === window.ETH_ADDRESS) {
let
c = window.BLOCKCHAINS[this.redPacket.chain],
symbol = c && c.native || 'ETH';
this.token = new Token(window.ETH_ADDRESS, symbol, 18);
} else {
// load ERC:
let
ercContract = new ethers.Contract(this.redPacket.token, this.redPacket.erc20ABI, useInjectedProvider ? provider.getSigner() : provider),
symbol = await ercContract.symbol(),
decimals = await ercContract.decimals();
this.token = new Token(this.redPacket.token, symbol, decimals);
}
this.loaded = true;
} catch (err) {
console.error(err);
}
this.loading = false;
},
signUrl: async function () {
try {
if (!this.account) {
throw 'Please connect with MetaMask first.';
}
if (!this.redPacket) {
throw 'Failed to load red packet.';
}
if (this.redPacket.creator.toLowerCase() !== this.account.toLowerCase()) {
throw 'You must sign the URL with creator address: ' + this.redPacket.abbrAddress(this.redPacket.creator);
}
let msg = this.redPacket.getRpParamsMessageForSign();
let sig = await getWeb3Provider().getSigner().signMessage(msg);
console.log(sig);
// now generate url:
let
params = this.redPacket.getRpParams(),
urlSearch = new URLSearchParams();
urlSearch.append('chain', this.redPacket.chain);
urlSearch.append('id', this.redPacket.id);
for (let k in params) {
urlSearch.append(k, params[k]);
}
urlSearch.append('sig', sig);
let url = location.protocol + '//' + location.host + location.pathname + '?' + urlSearch.toString();
let h = '<div class="mb-2">You have successfully generated the customized URL for this red packet:</div>' +
'<form><input class="form-control" readonly style="width: 80%" value="' + url + '"></form>' +
'<div class="mt-2"><a href="#0" onclick="navigator.clipboard.writeText(\'' + url + '\');">Copy</a> - <a href="https://tinyurl.com/" target="_blank">Shorten URL</a> - <a target="_blank" href="' + url +
'">Open URL</a></div>';
showInfo('Red Packet Customized URL', h);
} catch (err) {
showAlert('Error', translateError(err));
}
},
openRedPacket: function () {
if (this.redPacket.preview) {
this.bonusBN = ethers.utils.parseUnits('1', this.token.decimals);
this.toAddress = this.redPacket.abbrAddress('0xa1b200000000000000000000000000000000e8f9');
this.opened = true;
return;
}
if (this.redPacket.totalLeft === 0) {
return showAlert('Error', 'Red packet is empty. Hurry up next time!');
}
let that = this;
showInput(function (password) {
if (password.trim() !== '') {
that.tryOpenRedPacket(password.trim())
.then(console.log('tryOpenRedPacket: ok'))
.catch((e) => console.error(e));
}
});
},
tryOpenRedPacket: async function (password) {
if (!this.ready) {
return showAlert('Error', 'Please connect MetaMask to ' + this.correctNetworkName + ' first!');
}
let
payload = this.redPacket.creator.toLowerCase() + password,
passcode = ethers.BigNumber.from(keccak(payload)),
account = this.account.toLowerCase(),
accountBN = ethers.BigNumber.from(account),
secretBN = passcode.sub(accountBN);
// check validator:
if (this.redPacket.condition !== window.ZERO_ADDRESS) {
let validator = new ethers.Contract(this.redPacket.condition, this.redPacket.conditionABI, getWeb3Provider().getSigner());
let r = await validator.check(this.redPacket.redPacketAddress, this.redPacket.id, account);
if (!r) {
return showAlert('Error', 'You cannot open this red packet by address ' + this.redPacket.abbrAddress(account));
}
}
// check password:
console.log('passcode hash stored in contract:', this.redPacket.passcodeHash.toHexString());
console.log('passcode from user input = ' + passcode.toHexString());
console.log('secret = ' + secretBN.toHexString());
let { proof, publicSignals } = await prove(accountBN, secretBN);
console.log('proof:\n' + JSON.stringify(proof, null, 2) + '\n' + JSON.stringify(publicSignals, null, 2));
let passcodeHashBN = ethers.BigNumber.from(publicSignals[0]);
if (!passcodeHashBN.eq(this.redPacket.passcodeHash)) {
return showAlert('Error', 'Invalid password.');
}
// open:
let
proofs = [proof.pi_a[0], proof.pi_a[1], proof.pi_b[0][1], proof.pi_b[0][0], proof.pi_b[1][1], proof.pi_b[1][0], proof.pi_c[0], proof.pi_c[1]],
rpContract = new ethers.Contract(this.redPacket.redPacketAddress, this.redPacket.redPacketABI, getWeb3Provider().getSigner()),
loading = showLoading('Open', 'Check red packet status...');
for (let i = 0; i < proofs.length; i++) {
// string -> BN:
proofs[i] = ethers.BigNumber.from(proofs[i]).toHexString();
}
try {
// is opened?
let opened = await rpContract.isOpened(this.redPacket.id, account);
if (opened) {
throw 'You have already opened the red packet.';
}
loading.setMessage('Verify zk-proof...');
console.log('call verifyProof:');
for (let i = 0; i < proofs.length; i++) {
console.log(proofs[i]);
}
console.log(this.redPacket.passcodeHash.toHexString());
console.log(accountBN.toHexString());
let r = await rpContract.verifyProof(
[proofs[0], proofs[1]],
[[proofs[2], proofs[3]], [proofs[4], proofs[5]]],
[proofs[6], proofs[7]],
[passcodeHashBN.toHexString(), accountBN.toHexString()]
);
if (!r) {
throw 'Generate proof failed.';
}
loading.setMessage('Please sign transaction in MetaMask...');
console.log('call open: ' + this.redPacket.id + '[' + proofs.join(',') + ']');
let tx = await rpContract.open(this.redPacket.id, proofs);
loading.setMessage('Please wait for blockchain confirmation...');
await tx.wait(1);
loading.setMessage('Get transaction logs...');
// get red packet id from log:
let receipt = await getWeb3Provider().getTransactionReceipt(tx.hash);
let logs = receipt.logs;
for (let i = 0; i < logs.length; i++) {
let log = logs[i];
if (log.topics && log.topics[0] === this.redPacket.withdrawTopic) {
this.bonusBN = ethers.BigNumber.from('0x' + log.data.substring(66, 66 + 64), 16);
console.log('bonus: ' + this.bonusBN);
break;
}
}
this.toAddress = this.redPacket.abbrAddress(account);
this.opened = true;
loading.close();
} catch (err) {
loading.close();
return showAlert('Error', translateError(err));
}
},
abbrAddress: function (addr) {
if (!addr) {
return '';
}
let s = addr.toString();
if (s.indexOf('0x') === 0 && s.length === 42) {
let addr = ethers.utils.getAddress(s.substring(0));
return addr.substring(0, 6) + '...' + addr.substring(38);
}
return s;
},
tokenUrl: function (addr) {
let c = window.BLOCKCHAINS[this.chainId];
if (c) {
return c.scan + '/token/' + addr;
} else {
return '#1';
}
},
gotoScanUrl: function () {
let c = window.BLOCKCHAINS[this.chainId];
if (c) {
window.open(c.scan + '/address/' + this.account);
} else {
console.error('Invalid chain id: ', this.chainId);
}
},
gotoCustomizeUrl: function () {
let
params = this.redPacket.getRpParams(),
urlSearch = new URLSearchParams();
urlSearch.append('chain', this.redPacket.chain);
urlSearch.append('id', this.redPacket.id);
urlSearch.append('preview', 'true');
for (let k in params) {
urlSearch.append(k, params[k]);
}
location.assign('rp.html?' + urlSearch.toString());
},
accountChanged: function (accounts) {
console.log('wallet account changed:', accounts.length === 0 ? null : accounts[0]);
if (accounts.length === 0) {
this.disconnected();
} else {
this.account = accounts[0];
document.cookie = '__account__=' + this.account + ';max-age=1296000';
}
},
disconnected: async function () {
console.warn('wallet disconnected.');
this.account = null;
},
chainChanged: async function (chainId) {
console.log('wallet chainId changed: ' + chainId + ' = ' + parseInt(chainId, 16));
this.chainId = parseInt(chainId, 16);
await this.loadRedPacket();
},
connectWallet: async function () {
console.log('try connect wallet...');
if (window.getWeb3Provider() === null) {
console.error('there is no web3 provider.');
return false;
}
try {
this.accountChanged(await window.ethereum.request({
method: 'eth_requestAccounts',
}));
this.chainChanged(await window.ethereum.request({
method: 'eth_chainId'
}));
window.ethereum.on('disconnect', this.disconnected);
window.ethereum.on('accountsChanged', this.accountChanged);
window.ethereum.on('chainChanged', this.chainChanged);
} catch (e) {
console.error('could not get a wallet connection.', e);
return false;
}
console.log('wallet connected.');
return true;
}
},
mounted: async function () {
$('#vm').show();
await this.connectWallet();
await this.loadRedPacket();
if (this.redPacket.preview) {
// show customize:
let
$customize = $('#customize'),
$chain = $customize.find('input[name=chain]'),
$id = $customize.find('input[name=id]'),
$rpGreeting = $customize.find('input[name=rpGreeting]'),
$rpCreator = $customize.find('input[name=rpCreator]'),
$rpCoverImage = $customize.find('input[name=rpCoverImage]'),
$rpOpenImage = $customize.find('input[name=rpOpenImage]'),
$rpIconImage = $customize.find('input[name=rpIconImage]'),
$rpDisplayOpenInfo = $customize.find('input[name=rpDisplayOpenInfo]');
$chain.val(this.redPacket.chain);
$id.val(this.redPacket.id);
$rpGreeting.val(this.redPacket.getRpGreeting());
$rpCreator.val(this.redPacket.getRpCreator(this.redPacket.creator));
$rpCoverImage.val(this.redPacket.getRpCoverImage());
$rpOpenImage.val(this.redPacket.getRpOpenImage());
$rpIconImage.val(this.redPacket.getRpIconImage());
$rpDisplayOpenInfo.prop('checked', !this.redPacket.getRpDisplayOpenInfo());
$('#customize').show();
}
}
});
}
$(function () {
init();
});
</script>
</head>
<body>
<!-- Input Modal -->
<div id="inputModal" class="modal fade" role="dialog" aria-hidden="true" aria-labelledby="inputLabel">
<div class="modal-dialog modal-lg" role="document">
<div class="modal-content">
<div class="modal-header align-items-center d-flex">
<h4 class="modal-title" id="inputLabel">Password</h4>
</div>
<div class="modal-body">
<form onsubmit="return false">
<div class="mb-3">
<label for="inputPassword" class="form-label">Password for this red packet:</label>
<input id="inputPassword" type="text" maxlength="100" class="form-control">
<div class="form-text">Input the password of the red packet set by creator.</div>
</div>
</form>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-primary">OK</button>
<button type="button" class="btn btn-secondary" data-bs-dismiss="modal"
aria-label="Close">Cancel</button>
</div>
</div>
</div>
</div>
<!-- Loading Modal -->
<div id="loadingModal" class="modal fade" role="dialog" aria-hidden="true" aria-labelledby="loadingLabel">
<div class="modal-dialog modal-lg" role="document">
<div class="modal-content">
<div class="modal-header align-items-center d-flex">
<h4 class="modal-title x-title" id="loadingLabel"> </h4>
</div>
<div class="modal-body">
<div class="float-start">
<div class="spinner-border" role="status">
<span class="visually-hidden">Loading...</span>
</div>
</div>
<div class="ms-5 ps-4 float-none">
<p class="x-message"> </p>
</div>
</div>
<!-- <div class="modal-footer">
<button class="btn btn-outline-primary" data-bs-dismiss="modal" aria-label="Close">Cancel</button>
</div> -->
</div>
</div>
</div>
<!-- Alert Modal -->
<div id="alertModal" class="modal fade" role="dialog" aria-hidden="true" aria-labelledby="alertLabel">
<div class="modal-dialog modal-lg" role="document">
<div class="modal-content">
<div class="modal-header align-items-center d-flex">
<h4 class="modal-title x-title" id="alertLabel"> </h4>
<button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close">
<span aria-hidden="true"><i class="fe fe-x-circle"></i></span>
</button>
</div>
<div class="modal-body">
<div class="float-start">
<i class="fs-2 text-danger fe fe-alert-triangle"></i>
</div>
<div class="ms-5 ps-4 float-none">
<p class="x-message"> </p>
</div>
</div>
<div class="modal-footer">
<button class="btn btn-outline-primary" data-bs-dismiss="modal" aria-label="Close">OK</button>
</div>
</div>
</div>
</div>
<!-- Info Modal -->
<div id="infoModal" class="modal fade" role="dialog" aria-hidden="true" aria-labelledby="infoLabel">
<div class="modal-dialog modal-lg" role="document">
<div class="modal-content">
<div class="modal-header align-items-center d-flex">
<h4 class="modal-title x-title" id="infoLabel"> </h4>
<button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close">
<span aria-hidden="true"><i class="fe fe-x-circle"></i></span>
</button>
</div>
<div class="modal-body">