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const reverse = require("buffer-reverse");
module.exports = async (req, res) => {
let { user } = req;
let {
address,
tx: { hex }
} = req.body;
const isChange = async address =>
(await lq.getAddressInfo(address)).ismine &&
(!Object.keys(addresses).includes(address) || address === user.liquid);
const unblinded = await lq.unblindRawTransaction(hex);
tx = await lq.decodeRawTransaction(unblinded.hex);
let totals = {};
let change = {};
let fee = 0;
for (let i = 0; i < tx.vout.length; i++) {
let {
asset,
value,
scriptPubKey: { type, addresses }
} = tx.vout[i];
if (type === "fee") fee = toSats(value);
else {
if (!totals[asset]) totals[asset] = change[asset] = 0;
totals[asset] += toSats(value);
if (addresses) {
if (await isChange(addresses[0])) {
change[asset] += toSats(value);
}
}
}
}
const assets = Object.keys(totals);
const payments = [];
try {
await db.transaction(async transaction => {
for (let i = 0; i < assets.length; i++) {
let asset = assets[i];
let total = totals[asset];
if (change[asset]) total -= change[asset];
if (asset === config.liquid.btcasset) total += fee;
l.info("creating liquid payment", user.username, asset, total, fee);
let account = await db.Account.findOne({
where: {
user_id: user.id,
asset
},
lock: transaction.LOCK.UPDATE,
transaction
});
if (total > account.balance) {
l.warn("amount exceeds balance", {
total,
fee,
balance: account.balance
});
throw new Error("Insufficient funds");
}
account.balance -= total;
await account.save({ transaction });
let payment = {
amount: -total,
account_id: account.id,
fee,
user_id: user.id,
rate: app.get("rates")[user.currency],
currency: user.currency,
address,
confirmed: true,
received: false,
network: "LBTC"
};
payment.account = account;
payments.push(payment);
}
});
} catch (e) {
l.error("problem creating liquid payment", user.username, e.message);
return res.status(500).send(e.message);
}
try {
if (config.liquid.walletpass)
await lq.walletPassphrase(config.liquid.walletpass, 300);
hex = await lq.blindRawTransaction(hex);
rawtx = (await lq.signRawTransactionWithWallet(hex)).hex;
let txid = await lq.sendRawTransaction(rawtx);
let main;
for (let i = 0; i < assets.length; i++) {
p = payments[i];
let { account } = p;
p.hash = txid;
p = await db.Payment.create(p);
if (account.ticker !== "BTC" || !main) {
main = p.get({ plain: true });
main.account = account.get({ plain: true });
}
}
user = await getUser(user.username);
emit(user.username, "user", user);
res.send(main);
} catch (e) {
l.error("problem sending liquid", user.username, e.message);
return res.status(500).send(e.message);
}
};
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