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