refactor

1 files changed, 97 insertions, 0 deletions

diff --git a/routes/liquid/send.js b/routes/liquid/send.js
new file mode 100644
index 00000000..aaced4a9
--- /dev/null
+++ b/routes/liquid/send.js
@@ -0,0 +1,97 @@
+const reverse = require("buffer-reverse");
+
+module.exports = async (req, res) => {
+  let { user } = req;
+  let {
+    address,
+    tx: { hex }
+  } = req.body;
+
+  const isChange = async address => 
+    !((await bc.getAddressInfo(address)).ismine) ||
+    !Object.keys(addresses).includes(address) || 
+    address === user.liquid;
+
+  const unblinded = await bc.unblindRawTransaction(hex);
+  tx = await bc.decodeRawTransaction(unblinded.hex);
+  
+  let total = 0;
+  let change = 0;
+  let fee = 0;
+
+  for (let i = 0; i < tx.vout.length; i++) {
+    let o = tx.vout[i];
+    total += toSats(o.value);
+    if (o.scriptPubKey.type === 'fee') fee = toSats(o.value);
+   
+    if (o.scriptPubKey.addresses) {
+      if ((await isChange(o.scriptPubKey.addresses[0]))) {
+        change += toSats(o.value);
+      }
+    }
+  } 
+
+  total = total - change;
+  let amount = total - fee;
+
+  try {
+    await db.transaction(async transaction => {
+      let { balance } = await db.User.findOne({
+        where: {
+          username: user.username
+        },
+        lock: transaction.LOCK.UPDATE,
+        transaction
+      });
+
+      if (amount !== balance && total > balance) {
+        l.warn("amount exceeds balance", { amount, fee, balance });
+        throw new Error("insufficient funds");
+      }
+
+      req.user.balance -= total;
+      await user.save({ transaction });
+    });
+  } catch (e) {
+    l.warn("insufficient funds for liquid payment", e);
+    return res.status(500).send("Not enough satoshis");
+  }
+
+  try {
+    if (config.liquid.walletpass)
+      await bc.walletPassphrase(config.liquid.walletpass, 300);
+
+    hex = await bc.blindRawTransaction(hex);
+    rawtx = (await bc.signRawTransactionWithWallet(hex)).hex;
+    let txid = await bc.sendRawTransaction(rawtx);
+
+    await db.transaction(async transaction => {
+      await user.save({ transaction });
+      emit(user.username, "user", user);
+      l.info("total", total);
+
+      const payment = await db.Payment.create(
+        {
+          amount: -total,
+          fee,
+          user_id: user.id,
+          hash: txid,
+          rate: app.get("rates")[user.currency],
+          currency: user.currency,
+          address,
+          confirmed: true,
+          received: false,
+          asset: 'LBTC'
+        },
+        { transaction }
+      );
+
+      l.info("sent liquid", user.username, total);
+      emit(user.username, "payment", payment);
+      res.send(payment);
+    });
+  } catch (e) {
+    l.error("liquid send failed", e);
+    return res.status(500).send(e.message);
+  }
+};