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const reverse = require("buffer-reverse");
const zmq = require("zeromq");
const config = require("./config");
const Sequelize = require("sequelize");
const BitcoinCore = require("bitcoin-core");
const bitcoin = require("elementsjs-lib");
const l = require("pino")();
const zmqRawBlock = zmq.socket("sub");
zmqRawBlock.connect(config.liquid.zmqrawblock);
zmqRawBlock.subscribe("rawblock");
const zmqRawTx = zmq.socket("sub");
zmqRawTx.connect("tcp://127.0.0.1:18603");
zmqRawTx.subscribe("rawtx");
let NETWORK = bitcoin.networks[config.bitcoin.network === "mainnet" ? "bitcoin" : config.bitcoin.network];
const bc = new BitcoinCore(config.liquid);
const SATS = 100000000;
module.exports = (app, db, addresses, payments, emit) => {
zmqRawTx.on("message", async (topic, message, sequence) => {
const hex = message.toString("hex");
const unblinded = await bc.unblindRawTransaction(hex);
const tx = await bc.decodeRawTransaction(unblinded.hex);
const blinded = await bc.decodeRawTransaction(hex);
if (payments.includes(blinded.txid)) return;
Promise.all(
tx.vout.map(async o => {
if (!(o.scriptPubKey && o.scriptPubKey.addresses)) return;
let { value } = o;
value *= SATS
const address = o.scriptPubKey.addresses[0];
if (Object.keys(addresses).includes(address)) {
let user = await db.User.findOne({
where: {
username: addresses[address]
}
});
let invoices = await db.Payment.findAll({
limit: 1,
where: {
address,
received: null,
amount: {
[Sequelize.Op.gt]: 0
}
},
order: [["id", "DESC"]]
});
let tip = null;
if (invoices.length) tip = invoices[0].tip;
let confirmed = 0;
if (user.friend) {
user.balance += value;
confirmed = 1;
} else {
user.pending += value;
}
user.confidential = await bc.getNewAddress();
user.liquid = (await bc.getAddressInfo(user.confidential)).unconfidential;
addresses[user.liquid] = user.username;
await user.save();
emit(user.username, "user", user);
const payment = await db.Payment.create({
user_id: user.id,
hash: blinded.txid,
amount: value,
currency: user.currency,
rate: app.get("rates")[user.currency],
received: true,
tip,
confirmed,
address,
asset: 'LBTC',
});
payments.push(blinded.txid);
emit(user.username, "payment", payment);
}
})
);
});
let queue = {};
zmqRawBlock.on("message", async (topic, message, sequence) => {
const payments = await db.Payment.findAll({
where: { confirmed: 0 }
});
const hashes = payments.map(p => p.hash);
const block = bitcoin.Block.fromHex(message.toString("hex"), true);
const hash = await bc.getBlockHash(block.height);
const json = await bc.getBlock(hash, 2);
json.tx.map(tx => {
if (hashes.includes(tx.txid)) queue[tx.txid] = 1;
});
});
setInterval(async () => {
let arr = Object.keys(queue);
for (let i = 0; i < arr.length; i++) {
let hash = arr[i];
let p = await db.Payment.findOne({
include: [{ model: db.User, as: "user" }],
where: { hash, confirmed: 0, received: 1 }
})
p.confirmed = 1;
let user = await p.getUser();
user.balance += p.amount;
user.pending -= p.amount;
emit(user.username, "user", user);
await user.save();
await p.save();
let payments = await db.Payment.findAll({
where: {
user_id: user.id,
received: {
[Sequelize.Op.ne]: null
},
},
order: [['id', 'DESC']],
limit: 12
});
emit(user.username, "payments", payments);
delete queue[hash];
}
}, 1000);
};
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