use lua script for debit

1 files changed, 10 insertions, 22 deletions

diff --git a/lib/payments.js b/lib/payments.js
index e1ed5d0b..f39e2937 100644
--- a/lib/payments.js
+++ b/lib/payments.js
@@ -63,29 +63,17 @@ export let debit = async (
     ? Math.round(amount * config.fee)
     : 0;
 
-  await t(`balance:${uid}`, async (balance, db) => {
-    await t(`credit:${type}:${uid}`, async (credit, db) => {
-      let covered = Math.min(credit, ourfee) || 0;
-      ourfee -= covered;
+  let r = await db.debit(
+    `balance:${uid}`,
+    `credit:${type}:${uid}`,
+    amount || 0,
+    tip || 0,
+    fee || 0,
+    ourfee || 0
+  );
+
 
-      l(
-        "debiting",
-        user.username,
-        balance,
-        amount,
-        tip,
-        fee,
-        ourfee,
-        amount + fee + ourfee + tip
-      );
-      if (balance < amount + tip + fee + ourfee) fail("Insufficient funds");
-      await db
-        .multi()
-        .decrBy(`credit:${type}:${uid}`, covered)
-        .decrBy(`balance:${uid}`, amount + tip + fee + ourfee)
-        .exec();
-    });
-  });
+  if (r !== "ok") fail("Insufficient funds");
 
   let p = {
     id,