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const btc = config.liquid.btcasset;
module.exports = async (user, transaction, limit, fee, assets, amount, address, memo, asset) => {
let total = amount;
if (asset === btc) {
let covered = 0;
let nonbtc = assets.filter(a => a !== btc);
if (nonbtc.length === 1) {
let faucet = await db.Account.findOne({
where: {
asset: nonbtc[0],
user_id: null
},
lock: transaction.LOCK.UPDATE,
transaction
});
if (faucet) {
covered = faucet.balance;
if (covered > fee) covered = fee;
await faucet.decrement({balance: covered}, {transaction});
await faucet.reload({transaction});
await faucet.save({transaction});
}
}
total += fee - covered;
}
if (limit && total > limit + fee)
throw new Error("Tx amount exceeds authorized amount");
if (asset !== btc || total) {
l.info("creating liquid payment", user.username, asset, total, fee);
let account = await db.Account.findOne({
where: {
user_id: user.id,
asset,
pubkey: null
},
lock: transaction.LOCK.UPDATE,
order: [["balance", "DESC"]],
transaction
});
if (total > account.balance) {
l.warn("amount exceeds balance", {
total,
fee,
balance: account.balance
});
throw new Error(
`Insufficient funds, need ${total} ${
account.ticker === "BTC" ? "SAT" : account.ticker
}, have ${account.balance}`
);
}
await account.decrement({balance: total}, {transaction});
await account.reload({transaction});
let payment = {
amount: -amount,
account_id: account.id,
fee,
memo,
user_id: user.id,
rate: app.get("rates")[user.currency],
currency: user.currency,
address,
confirmed: true,
received: false,
network: "liquid"
};
payment.account = account;
return payment;
}
return null;
};
|
