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/core/base.py

@@ -88,10 +88,16 @@ class Proof(BaseModel):
     time_created: Union[None, str] = ""
     time_reserved: Union[None, str] = ""
     derivation_path: Union[None, str] = ""  # derivation path of the proof
+    mint_id: Union[None, str] = (
+        None  # holds the id of the mint operation that created this proof
+    )
+    melt_id: Union[None, str] = (
+        None  # holds the id of the melt operation that destroyed this proof
+    )
 
     @classmethod
     def from_dict(cls, proof_dict: dict):
-        if proof_dict.get("dleq"):
+        if proof_dict.get("dleq") and isinstance(proof_dict["dleq"], str):
             proof_dict["dleq"] = DLEQWallet(**json.loads(proof_dict["dleq"]))
         c = cls(**proof_dict)
         return c
@@ -181,8 +187,9 @@ class BlindedMessages(BaseModel):
 
 class Invoice(BaseModel):
     amount: int
-    pr: str
-    hash: str
+    bolt11: str
+    id: str
+    out: Union[None, bool] = None
     payment_hash: Union[None, str] = None
     preimage: Union[str, None] = None
     issued: Union[None, bool] = False