Remove paid field in MeltQuote

cashu/core/base.py

@@ -343,13 +343,6 @@ def from_row(cls, row: Row, change: Optional[List[BlindedSignature]] = None):
 
     @classmethod
     def from_resp_wallet(cls, melt_quote_resp, mint: str, unit: str, request: str):
-        # BEGIN: BACKWARDS COMPATIBILITY < 0.16.0: "paid" field to "state"
-        if melt_quote_resp.state is None:
-            if melt_quote_resp.paid is True:
-                melt_quote_resp.state = MeltQuoteState.paid
-            elif melt_quote_resp.paid is False:
-                melt_quote_resp.state = MeltQuoteState.unpaid
-        # END: BACKWARDS COMPATIBILITY < 0.16.0
         return cls(
             quote=melt_quote_resp.quote,
             method="bolt11",

cashu/core/models/melt_quote.py

@@ -47,9 +47,6 @@ class PostMeltQuoteResponse(BaseModel):
         str
     ]  # output payment request (optional for BACKWARDS COMPAT mint response < 0.17.0)
     fee_reserve: int  # input fee reserve
-    paid: Optional[bool] = (
-        None  # whether the request has been paid # DEPRECATED as per NUT PR #136
-    )
     state: Optional[str]  # state of the quote
     expiry: Optional[int]  # expiry of the quote
     payment_preimage: Optional[str] = None  # payment preimage
@@ -60,6 +57,4 @@ def from_melt_quote(cls, melt_quote: MeltQuote) -> "PostMeltQuoteResponse":
         to_dict = melt_quote.model_dump()
         # turn state into string
         to_dict["state"] = melt_quote.state.value
-        # add deprecated "paid" field
-        to_dict["paid"] = melt_quote.paid
         return cls.model_validate(to_dict)

cashu/mint/auth/crud.py

@@ -500,8 +500,8 @@ async def store_melt_quote(
         await (conn or db).execute(
             f"""
             INSERT INTO {db.table_with_schema('melt_quotes')}
-            (quote, method, request, checking_id, unit, amount, fee_reserve, paid, state, created_time, paid_time, fee_paid, proof, change, expiry)
-            VALUES (:quote, :method, :request, :checking_id, :unit, :amount, :fee_reserve, :paid, :state, :created_time, :paid_time, :fee_paid, :proof, :change, :expiry)
+            (quote, method, request, checking_id, unit, amount, fee_reserve, state, created_time, paid_time, fee_paid, proof, change, expiry)
+            VALUES (:quote, :method, :request, :checking_id, :unit, :amount, :fee_reserve, :state, :created_time, :paid_time, :fee_paid, :proof, :change, :expiry)
             """,
             {
                 "quote": quote.quote,
@@ -511,8 +511,7 @@ async def store_melt_quote(
                 "unit": quote.unit,
                 "amount": quote.amount,
                 "fee_reserve": quote.fee_reserve or 0,
-                "paid": quote.paid,
-                "state": quote.state.name,
+                "state": quote.state.value,
                 "created_time": db.to_timestamp(
                     db.timestamp_from_seconds(quote.created_time) or ""
                 ),
@@ -571,11 +570,10 @@ async def update_melt_quote(
     ) -> None:
         await (conn or db).execute(
             f"""
-            UPDATE {db.table_with_schema('melt_quotes')} SET paid = :paid, state = :state, fee_paid = :fee_paid, paid_time = :paid_time, proof = :proof, change = :change WHERE quote = :quote
+            UPDATE {db.table_with_schema('melt_quotes')} SET state = :state, fee_paid = :fee_paid, paid_time = :paid_time, proof = :proof, change = :change WHERE quote = :quote
             """,
             {
-                "paid": quote.paid,
-                "state": quote.state.name,
+                "state": quote.state.value,
                 "fee_paid": quote.fee_paid,
                 "paid_time": db.to_timestamp(
                     db.timestamp_from_seconds(quote.paid_time) or ""

cashu/mint/crud.py

@@ -758,8 +758,8 @@ async def store_melt_quote(
         await (conn or db).execute(
             f"""
             INSERT INTO {db.table_with_schema("melt_quotes")}
-            (quote, method, request, checking_id, unit, amount, fee_reserve, state, paid, created_time, paid_time, fee_paid, proof, expiry)
-            VALUES (:quote, :method, :request, :checking_id, :unit, :amount, :fee_reserve, :state, :paid, :created_time, :paid_time, :fee_paid, :proof, :expiry)
+            (quote, method, request, checking_id, unit, amount, fee_reserve, state, created_time, paid_time, fee_paid, proof, expiry)
+            VALUES (:quote, :method, :request, :checking_id, :unit, :amount, :fee_reserve, :state, :created_time, :paid_time, :fee_paid, :proof, :expiry)
             """,
             {
                 "quote": quote.quote,
@@ -770,7 +770,6 @@ async def store_melt_quote(
                 "amount": quote.amount,
                 "fee_reserve": quote.fee_reserve or 0,
                 "state": quote.state.value,
-                "paid": quote.paid,  # this is deprecated! we need to store it because we have a NOT NULL constraint | we could also remove the column but sqlite doesn't support that (we would have to make a new table)
                 "created_time": db.to_timestamp(
                     db.timestamp_from_seconds(quote.created_time) or ""
                 ),

cashu/mint/ledger.py

@@ -807,7 +807,6 @@ async def melt_quote(
             unit=quote.unit,
             request=quote.request,
             fee_reserve=quote.fee_reserve,
-            paid=quote.paid,  # deprecated
             state=quote.state.value,
             expiry=quote.expiry,
         )
@@ -946,7 +945,7 @@ async def melt_mint_settle_internally(
             return melt_quote
 
         # we settle the transaction internally
-        if melt_quote.paid:
+        if melt_quote.state == MeltQuoteState.paid:
             raise TransactionError("melt quote already paid")
 
         # verify amounts from bolt11 invoice
@@ -1102,7 +1101,7 @@ async def melt(
         # if the melt corresponds to an internal mint, mark both as paid
         melt_quote = await self.melt_mint_settle_internally(melt_quote, proofs)
         # quote not paid yet (not internal), pay it with the backend
-        if not melt_quote.paid:
+        if melt_quote.state == MeltQuoteState.pending:
             logger.debug(f"Lightning: pay invoice {melt_quote.request}")
             try:
                 payment = await self.backends[method][unit].pay_invoice(

cashu/mint/migrations.py

@@ -1261,3 +1261,48 @@ async def m035_add_last_checked_to_mint_quotes(db: Database):
                 ADD COLUMN last_checked TIMESTAMP NULL
             """
         )
+
+
+async def m036_remove_paid_from_melt_quote(db: Database):
+    """Remove the deprecated 'paid' field from melt_quotes.
+    The 'state' column now fully represents payment status."""
+    async with db.connect() as conn:
+        if conn.type == "SQLITE":
+            await conn.execute("PRAGMA foreign_keys=OFF;")
+            await conn.execute(
+                f"""
+                    CREATE TABLE {db.table_with_schema('melt_quotes_new')} (
+                        quote TEXT NOT NULL,
+                        method TEXT NOT NULL,
+                        request TEXT NOT NULL,
+                        checking_id TEXT NOT NULL,
+                        unit TEXT NOT NULL,
+                        amount {db.big_int} NOT NULL,
+                        fee_reserve {db.big_int},
+                        created_time TIMESTAMP,
+                        paid_time TIMESTAMP,
+                        fee_paid {db.big_int},
+                        proof TEXT,
+                        state TEXT,
+                        expiry TIMESTAMP,
+                        UNIQUE (quote)
+                    );
+                """
+            )
+            await conn.execute(
+                f"""
+                    INSERT INTO {db.table_with_schema('melt_quotes_new')}
+                    (quote, method, request, checking_id, unit, amount, fee_reserve, created_time, paid_time, fee_paid, proof, state, expiry)
+                    SELECT quote, method, request, checking_id, unit, amount, fee_reserve, created_time, paid_time, fee_paid, proof, state, expiry
+                    FROM {db.table_with_schema('melt_quotes')};
+                """
+            )
+            await conn.execute(f"DROP TABLE {db.table_with_schema('melt_quotes')};")
+            await conn.execute(
+                f"ALTER TABLE {db.table_with_schema('melt_quotes_new')} RENAME TO {db.table_with_schema('melt_quotes')};"
+            )
+            await conn.execute("PRAGMA foreign_keys=ON;")
+        elif conn.type == "POSTGRES":
+            await conn.execute(
+                f"ALTER TABLE {db.table_with_schema('melt_quotes')} DROP COLUMN IF EXISTS paid;"
+            )

cashu/mint/router.py

@@ -353,7 +353,6 @@ async def get_melt_quote(request: Request, quote: str) -> PostMeltQuoteResponse:
         unit=melt_quote.unit,
         request=melt_quote.request,
         fee_reserve=melt_quote.fee_reserve,
-        paid=melt_quote.paid,
         state=melt_quote.state.value,
         expiry=melt_quote.expiry,
         payment_preimage=melt_quote.payment_preimage,

cashu/wallet/v1_api.py

@@ -533,7 +533,6 @@ def _meltrequest_include_fields(
                 unit="sat",
                 request="lnbc0",
                 fee_reserve=0,
-                paid=ret.paid or False,
                 state=(
                     MeltQuoteState.paid.value
                     if ret.paid

tests/fuzz/test_fuzz_core.py

@@ -171,17 +171,17 @@ def test_fuzz_melt_quote(quote, method, request, checking_id, unit, amount, fee_
 
     # Test property accessors
     if state == MeltQuoteState.paid:
-        assert mq.paid
-        assert not mq.unpaid
-        assert not mq.pending
+        assert mq.state == MeltQuoteState.paid
+        assert mq.state != MeltQuoteState.unpaid
+        assert mq.state != MeltQuoteState.pending
     elif state == MeltQuoteState.unpaid:
-        assert not mq.paid
-        assert mq.unpaid
-        assert not mq.pending
+        assert mq.state != MeltQuoteState.paid
+        assert mq.state == MeltQuoteState.unpaid
+        assert mq.state != MeltQuoteState.pending
     elif state == MeltQuoteState.pending:
-        assert not mq.paid
-        assert not mq.unpaid
-        assert mq.pending
+        assert mq.state != MeltQuoteState.paid
+        assert mq.state != MeltQuoteState.unpaid
+        assert mq.state == MeltQuoteState.pending
 
 @given(
     quote=st.text(min_size=1, max_size=50),

tests/mint/test_mint_api.py

@@ -362,26 +362,6 @@ async def test_melt_quote_internal(ledger: Ledger, wallet: Wallet):
 
     assert result["expiry"] == expiry
 
-    # # get melt quote again from api
-    # response = httpx.get(
-    #     f"{BASE_URL}/v1/melt/quote/bolt11/{result['quote']}",
-    # )
-    # assert response.status_code == 200, f"{response.url} {response.status_code}"
-    # result2 = response.json()
-    # assert result2["quote"] == result["quote"]
-
-    # # deserialize the response
-    # resp_quote = PostMeltQuoteResponse(**result2)
-    # assert resp_quote.quote == result["quote"]
-    # assert resp_quote.payment_preimage is not None
-    # assert len(resp_quote.payment_preimage) == 64
-    # assert resp_quote.change is not None
-    # assert resp_quote.state == MeltQuoteState.paid.value
-
-    # # check if DEPRECATED paid flag is also returned
-    # assert result2["paid"] is True
-    # assert resp_quote.paid is True
-
 
 @pytest.mark.asyncio
 @pytest.mark.skipif(