Wallet: Lightning interface (#318)

* mint does not start yet

* fix import

* revert mint db migrations

* handle zero fee case

* cli: adjust fee message

* wallet: replace requests with httpx

* clean up

* rename http client decorator

* fix pending check in main, todo: TEST PROXIES WITH HTTPX

* fix up

* use httpx for nostr as well

* update packages to same versions as https://github.com/lnbits/lnbits/pull/1609/files

* fix proof deserialization

* check for string

* tests passing

* adjust wallet api tests

* lockfile

* add correct responses to Lightning interface and delete melt_id for proofs for which the payent has failed

* fix create_invoice checking_id response

* migrations atomic

* proofs are stored automatically when created

* make format

* use bolt11 lib

* stricter type checking

* add fee response to payments

* assert fees in test_melt

* test that mint_id and melt_id is stored correctly in proofs and proofs_used

* remove traces

* refactor: Lightning interface into own file and LedgerCrud with typing

* fix tests

* fix payment response

* rename variable

cashu/lightning/base.py

@@ -1,29 +1,30 @@
 from abc import ABC, abstractmethod
-from typing import Coroutine, NamedTuple, Optional
+from typing import Coroutine, Optional
+
+from pydantic import BaseModel
 
 
-class StatusResponse(NamedTuple):
+class StatusResponse(BaseModel):
     error_message: Optional[str]
     balance_msat: int
 
 
-class InvoiceResponse(NamedTuple):
-    ok: bool
-    checking_id: Optional[str] = None  # payment_hash, rpc_id
+class InvoiceResponse(BaseModel):
+    ok: bool  # True: invoice created, False: failed
+    checking_id: Optional[str] = None
     payment_request: Optional[str] = None
     error_message: Optional[str] = None
 
 
-class PaymentResponse(NamedTuple):
-    # when ok is None it means we don't know if this succeeded
-    ok: Optional[bool] = None
-    checking_id: Optional[str] = None  # payment_hash, rcp_id
+class PaymentResponse(BaseModel):
+    ok: Optional[bool] = None  # True: paid, False: failed, None: pending or unknown
+    checking_id: Optional[str] = None
     fee_msat: Optional[int] = None
     preimage: Optional[str] = None
     error_message: Optional[str] = None
 
 
-class PaymentStatus(NamedTuple):
+class PaymentStatus(BaseModel):
     paid: Optional[bool] = None
     fee_msat: Optional[int] = None
     preimage: Optional[str] = None