Nutshell cleanup wishlist (#332)

* fix keys

* fix tests

* backwards compatible api upgrade

* upgrade seems to work

* fix tests

* add deprecated api functions

* add more tests of backwards compat

* add test serialization for nut00

* remove a redundant test

* move mint and melt to new api

* mypy works

* CI: mypy --check-untyped-defs

* add deprecated router

* add hints and remove logs

* fix tests

* cleanup

* use new mint and melt endpoints

* tests passing?

* fix mypy

* make format

* make format

* make format

* commit

* errors gone

* save

* adjust the API

* store quotes in db

* make mypy happy

* add fakewallet settings

* remove LIGHTNING=True and pass quote id for melt

* format

* tests passing

* add CoreLightningRestWallet

* add macaroon loader

* add correct config

* preimage -> proof

* move wallet.status() to cli.helpers.print_status()

* remove statuses from tests

* remove

* make format

* Use httpx in deprecated wallet

* fix cln interface

* create invoice before quote

* internal transactions and deprecated api testing

* fix tests

* add deprecated API tests

* fastapi type hints break things

* fix duplicate wallet error

* make format

* update poetry in CI to 1.7.1

* precommit restore

* remove bolt11

* oops

* default poetry

* store fee reserve for melt quotes and refactor melt()

* works?

* make format

* test

* finally

* fix deprecated models

* rename v1 endpoints to bolt11

* raise restore and check to v1, bump version to 0.15.0

* add version byte to keyset id

* remove redundant fields in json

* checks

* generate bip32 keyset wip

* migrate old keysets

* load duplicate keys

* duplicate old keysets

* revert router changes

* add deprecated /check and /restore endpoints

* try except invalidate

* parse unit from derivation path, adjust keyset id calculation with bytes

* remove keyest id from functions again and rely on self.keyset_id

* mosts tests work

* mint loads multiple derivation paths

* make format

* properly print units

* fix tests

* wallet works with multiple units

* add strike wallet and choose backend dynamically

* fix mypy

* add get_payment_quote to lightning backends

* make format

* fix startup

* fix lnbitswallet

* fix tests

* LightningWallet -> LightningBackend

* remove comments

* make format

* remove msat conversion

* add Amount type

* fix regtest

* use melt_quote as argument for pay_invoice

* test old api

* fees in sats

* fix deprecated fees

* fixes

* print balance correctly

* internally index keyset response by int

* add pydantic validation to input models

* add timestamps to mint db

* store timestamps for invoices, promises, proofs_used

* fix wallet migration

* rotate keys correctly for testing

* remove print

* update latest keyset

* fix tests

* fix test

* make format

* make format with correct black version

* remove nsat and cheese

* test against deprecated mint

* fix tests?

* actually use env var

* mint run with env vars

* moar test

* cleanup

* simplify tests, load all keys

* try out testing with internal invoices

* fix internal melt test

* fix test

* deprecated checkfees expects appropriate fees

* adjust comment

* drop lightning table

* split migration for testing for now, remove it later

* remove unused lightning table

* skip_private_key -> skip_db_read

* throw error on migration error

* reorder

* fix migrations

* fix lnbits fee return value negative

* fix typo

* comments

* add type

* make format

* split must use correct amount

* fix tests

* test deprecated api with internal/external melts

* do not split if not necessary

* refactor

* fix test

* make format with new black

* cleanup and add comments

* add quote state check endpoints

* fix deprecated wallet response

* split -> swap endpoint

* make format

* add expiry to quotes, get quote endpoints, and adjust to nut review comments

* allow overpayment of melt

* add lightning wallet tests

* commiting to save

* fix tests a bit

* make format

* remove comments

* get mint info

* check_spendable default False, and return payment quote checking id

* make format

* bump version in pyproject

* update to /v1/checkstate

* make format

* fix mint api checks

* return witness on /v1/checkstate

* no failfast

* try fail-fast: false in ci.yaml

* fix db lookup

* clean up literals

cashu/core/legacy.py

@@ -1,38 +1,10 @@
 import hashlib
 
-from secp256k1 import PrivateKey, PublicKey
+from secp256k1 import PrivateKey
 
 from ..core.settings import settings
 
 
-def hash_to_point_pre_0_3_3(secret_msg):
-    """
-    NOTE: Clients pre 0.3.3 used a different hash_to_curve
-
-    Generates x coordinate from the message hash and checks if the point lies on the curve.
-    If it does not, it tries computing again a new x coordinate from the hash of the coordinate.
-    """
-    point = None
-    msg = secret_msg
-    while point is None:
-        _hash = hashlib.sha256(msg).hexdigest().encode("utf-8")  # type: ignore
-        try:
-            # We construct compressed pub which has x coordinate encoded with even y
-            _hash_list = list(_hash[:33])  # take the 33 bytes and get a list of bytes
-            _hash_list[0] = 0x02  # set first byte to represent even y coord
-            _hash = bytes(_hash_list)
-            point = PublicKey(_hash, raw=True)
-        except Exception:
-            msg = _hash
-
-    return point
-
-
-def verify_pre_0_3_3(a, C, secret_msg):
-    Y = hash_to_point_pre_0_3_3(secret_msg.encode("utf-8"))
-    return C == Y.mult(a)  # type: ignore
-
-
 def derive_keys_backwards_compatible_insecure_pre_0_12(
     master_key: str, derivation_path: str = ""
 ):