initial commit

mint/migrations.py

@@ -0,0 +1,67 @@
+from core.db import Database
+
+# from wallet import db
+
+
+async def m001_initial(db: Database):
+    await db.execute(
+        """
+            CREATE TABLE IF NOT EXISTS promises (
+                amount INTEGER NOT NULL,
+                B_x TEXT NOT NULL,
+                B_y TEXT NOT NULL,
+                C_x TEXT NOT NULL,
+                C_y TEXT NOT NULL,
+
+                UNIQUE (B_x, B_y)
+
+            );
+        """
+    )
+
+    await db.execute(
+        """
+            CREATE TABLE IF NOT EXISTS proofs_used (
+                amount INTEGER NOT NULL,
+                C_x TEXT NOT NULL,
+                C_y TEXT NOT NULL,
+                secret TEXT NOT NULL,
+
+                UNIQUE (secret)
+
+            );
+        """
+    )
+
+    await db.execute(
+        """
+        CREATE VIEW IF NOT EXISTS balance_issued AS
+        SELECT COALESCE(SUM(s), 0) AS balance FROM (
+            SELECT SUM(amount) AS s
+            FROM promises
+            WHERE amount > 0
+        );
+    """
+    )
+
+    await db.execute(
+        """
+        CREATE VIEW IF NOT EXISTS balance_used AS
+        SELECT COALESCE(SUM(s), 0) AS balance FROM (
+            SELECT SUM(amount) AS s
+            FROM proofs_used
+            WHERE amount > 0
+        );
+    """
+    )
+
+    await db.execute(
+        """
+        CREATE VIEW IF NOT EXISTS balance AS
+        SELECT s_issued - s_used AS balance FROM (
+            SELECT bi.balance AS s_issued, bu.balance AS s_used
+            FROM balance_issued bi
+            CROSS JOIN balance_used bu
+        );
+    """
+    )