[Wallet/Mint] DLEQ proofs (#175)

* produce dleq

* start working on verification

* wip dleq

* Use C_ instead of C in verify DLEQ! (#176)

* Fix comments (DLEQ sign error)
* Fix alice_verify_dleq in d_dhke.py
* Fix_generate_promise in ledger.py
* Fix verify_proofs_dleq in wallet.py

* Fix: invalid public key (#182)

* Use C_ instead of C in verify DLEQ!

* Fix comments (DLEQ sign error)
* Fix alice_verify_dleq in d_dhke.py
* Fix_generate_promise in ledger.py
* Fix verify_proofs_dleq in wallet.py

* Fix: invalid public key

* Exception: Mint Error: invalid public key

* Update cashu/wallet/wallet.py

---------

Co-authored-by: calle <93376500+callebtc@users.noreply.github.com>

* Update cashu/core/b_dhke.py

* Update tests/test_cli.py

* verify all constructed proofs

* dleq upon receive

* serialize without dleq

* all tests passing

* make format

* remove print

* remove debug

* option to send with dleq

* add tests

* fix test

* deterministic p in step2_dleq and fix mypy error for hash_to_curve

* test crypto/hash_e and crypto/step2_bob_dleq

* rename A to K in b_dhke.py and test_alice_verify_dleq

* rename tests

* make format

* store dleq in mint db (and readd balance view)

* remove `r` from dleq in tests

* add pending output

* make format

* works with pre-dleq mints

* fix comments

* make format

* fix some tests

* fix last test

* test serialize dleq fix

* flake

* flake

* keyset.id must be str

* fix test decorators

* start removing the duplicate fields from the dleq

* format

* remove print

* cleanup

* add type anotations to dleq functions

* remove unnecessary fields from BlindedSignature

* tests not working yet

* spelling mistakes

* spelling mistakes

* fix more spelling mistakes

* revert to normal

* add comments

* bdhke: generalize hash_e

* remove P2PKSecret changes

* revert tests for P2PKSecret

* revert tests

* revert test fully

* revert p2pksecret changes

* refactor proof invalidation

* store dleq proofs in wallet db

* make mypy happy

---------

Co-authored-by: moonsettler <moonsettler@protonmail.com>

cashu/mint/crud.py

@@ -49,23 +49,28 @@ class LedgerCrud:
 
 
 async def store_promise(
+    *,
     db: Database,
     amount: int,
     B_: str,
     C_: str,
     id: str,
+    e: str = "",
+    s: str = "",
     conn: Optional[Connection] = None,
 ):
     await (conn or db).execute(
         f"""
         INSERT INTO {table_with_schema(db, 'promises')}
-          (amount, B_b, C_b, id)
-        VALUES (?, ?, ?, ?)
+          (amount, B_b, C_b, e, s, id)
+        VALUES (?, ?, ?, ?, ?, ?)
         """,
         (
             amount,
-            str(B_),
-            str(C_),
+            B_,
+            C_,
+            e,
+            s,
             id,
         ),
     )