record sats spent on auction items

components/item.js

@@ -60,7 +60,7 @@ export function ItemJob ({ item, rank, children }) {
             </a>
           </div>
           <div className={`${styles.other}`}>
-            <span>{formatSats(item.maxBid)} sats</span>
+            <span>{formatSats(item.maxBid)} sats per min</span>
             <span> \ </span>
             <Link href={`/items/${item.id}`} passHref>
               <a className='text-reset'>{item.ncomments} comments</a>

prisma/migrations/20220315171015_item_act_stream/migration.sql

@@ -0,0 +1,38 @@
+-- AlterEnum
+ALTER TYPE "ItemActType" ADD VALUE 'STREAM';
+
+-- charge the user for the auction item
+CREATE OR REPLACE FUNCTION run_auction(item_id INTEGER) RETURNS void AS $$
+    DECLARE
+        bid INTEGER;
+        user_id INTEGER;
+        user_msats INTEGER;
+        item_status "Status";
+    BEGIN
+        PERFORM ASSERT_SERIALIZED();
+
+        -- extract data we need
+        SELECT "maxBid" * 1000, "userId", status INTO bid, user_id, item_status FROM "Item" WHERE id = item_id;
+        SELECT msats INTO user_msats FROM users WHERE id = user_id;
+
+        -- check if user wallet has enough sats
+        IF bid > user_msats THEN
+            -- if not, set status = NOSATS and statusUpdatedAt to now_utc if not already set
+            IF item_status <> 'NOSATS' THEN
+                UPDATE "Item" SET status = 'NOSATS', "statusUpdatedAt" = now_utc() WHERE id = item_id;
+            END IF;
+        ELSE
+            -- if so, deduct from user
+            UPDATE users SET msats = msats - bid WHERE id = user_id;
+
+            -- create an item act
+            INSERT INTO "ItemAct" (sats, "itemId", "userId", act, created_at, updated_at)
+            VALUES (bid / 1000, item_id, user_id, 'STREAM', now_utc(), now_utc());
+
+            -- update item status = ACTIVE and statusUpdatedAt = null if NOSATS
+            IF item_status = 'NOSATS' THEN
+                UPDATE "Item" SET status = 'ACTIVE', "statusUpdatedAt" = now_utc() WHERE id = item_id;
+            END IF;
+        END IF;
+    END;
+$$ LANGUAGE plpgsql;

prisma/schema.prisma

@@ -176,6 +176,7 @@ enum ItemActType {
   VOTE
   BOOST
   TIP
+  STREAM
 }
 
 model ItemAct {