[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/wallet/api/router.py

@@ -225,11 +225,11 @@ async def send_command(
     global wallet
     if not nostr:
         balance, token = await send(
-            wallet, amount, lock, legacy=False, split=not nosplit
+            wallet, amount=amount, lock=lock, legacy=False, split=not nosplit
         )
         return SendResponse(balance=balance, token=token)
     else:
-        token, pubkey = await send_nostr(wallet, amount, nostr)
+        token, pubkey = await send_nostr(wallet, amount=amount, pubkey=nostr)
         return SendResponse(balance=wallet.available_balance, token=token, npub=pubkey)
 
 
@@ -325,7 +325,7 @@ async def pending(
             enumerate(
                 groupby(
                     sorted_proofs,
-                    key=itemgetter("send_id"),
+                    key=itemgetter("send_id"),  # type: ignore
                 )
             ),
             offset,
@@ -334,9 +334,9 @@ async def pending(
             grouped_proofs = list(value)
             token = await wallet.serialize_proofs(grouped_proofs)
             tokenObj = deserialize_token_from_string(token)
-            mint = [t.mint for t in tokenObj.token][0]
+            mint = [t.mint for t in tokenObj.token if t.mint][0]
             reserved_date = datetime.utcfromtimestamp(
-                int(grouped_proofs[0].time_reserved)
+                int(grouped_proofs[0].time_reserved)  # type: ignore
             ).strftime("%Y-%m-%d %H:%M:%S")
             result.update(
                 {