allow external migration modules
This commit is contained in:
callebtc
parent
c36f7a48aa
commit
79a0c28f23
|
|
@ -65,14 +65,14 @@ async def migrate_databases():
|
|||
(db_name, version, version),
|
||||
)
|
||||
|
||||
async def run_migration(db, migrations_module):
|
||||
db_name = migrations_module.__name__.split(".")[-2]
|
||||
async def run_migration(db, migrations_module, db_name):
|
||||
for key, migrate in migrations_module.__dict__.items():
|
||||
match = match = matcher.match(key)
|
||||
if match:
|
||||
version = int(match.group(1))
|
||||
if version > current_versions.get(db_name, 0):
|
||||
logger.debug(f"running migration {db_name}.{version}")
|
||||
logger.debug(f"db = {db}")
|
||||
await migrate(db)
|
||||
|
||||
if db.schema == None:
|
||||
|
|
@ -97,20 +97,24 @@ async def migrate_databases():
|
|||
rows = await (await conn.execute("SELECT * FROM dbversions")).fetchall()
|
||||
current_versions = {row["db"]: row["version"] for row in rows}
|
||||
matcher = re.compile(r"^m(\d\d\d)_")
|
||||
await run_migration(conn, core_migrations)
|
||||
db_name = core_migrations.__name__.split(".")[-2]
|
||||
await run_migration(conn, core_migrations, db_name)
|
||||
|
||||
for ext in get_valid_extensions():
|
||||
try:
|
||||
ext_migrations = importlib.import_module(
|
||||
f"lnbits.extensions.{ext.code}.migrations"
|
||||
|
||||
module_str = (
|
||||
ext.migration_module or f"lnbits.extensions.{ext.code}.migrations"
|
||||
)
|
||||
ext_migrations = importlib.import_module(module_str)
|
||||
ext_db = importlib.import_module(f"lnbits.extensions.{ext.code}").db
|
||||
db_name = ext.db_name or module_str.split(".")[-2]
|
||||
except ImportError:
|
||||
raise ImportError(
|
||||
f"Please make sure that the extension `{ext.code}` has a migrations file."
|
||||
)
|
||||
|
||||
async with ext_db.connect() as ext_conn:
|
||||
await run_migration(ext_conn, ext_migrations)
|
||||
await run_migration(ext_conn, ext_migrations, db_name)
|
||||
|
||||
logger.info("✔️ All migrations done.")
|
||||
|
|
|
|||
|
|
@ -1,351 +0,0 @@
|
|||
import hashlib
|
||||
from typing import List, Set
|
||||
|
||||
from fastapi import Query
|
||||
from secp256k1 import PrivateKey, PublicKey
|
||||
|
||||
from lnbits.core.services import check_transaction_status, create_invoice
|
||||
|
||||
from .crud import get_cashu
|
||||
from .models import BlindedMessage, BlindedSignature, Invoice, Proof
|
||||
|
||||
|
||||
def _derive_keys(master_key: str, cashu_id: str = Query(None)):
|
||||
"""Deterministic derivation of keys for 2^n values."""
|
||||
return {
|
||||
2
|
||||
** i: PrivateKey(
|
||||
hashlib.sha256((str(master_key) + str(i)).encode("utf-8"))
|
||||
.hexdigest()
|
||||
.encode("utf-8")[:32],
|
||||
raw=True,
|
||||
)
|
||||
for i in range(MAX_ORDER)
|
||||
}
|
||||
|
||||
|
||||
def _derive_pubkeys(keys: List[PrivateKey], cashu_id: str = Query(None)):
|
||||
return {amt: keys[amt].pubkey for amt in [2**i for i in range(MAX_ORDER)]}
|
||||
|
||||
|
||||
async def _generate_promises(
|
||||
amounts: List[int], B_s: List[str], cashu_id: str = Query(None)
|
||||
):
|
||||
"""Generates promises that sum to the given amount."""
|
||||
return [
|
||||
await self._generate_promise(amount, PublicKey(bytes.fromhex(B_), raw=True))
|
||||
for (amount, B_) in zip(amounts, B_s)
|
||||
]
|
||||
|
||||
|
||||
async def _generate_promise(amount: int, B_: PublicKey, cashu_id: str = Query(None)):
|
||||
"""Generates a promise for given amount and returns a pair (amount, C')."""
|
||||
secret_key = self.keys[amount] # Get the correct key
|
||||
C_ = step2_bob(B_, secret_key)
|
||||
await store_promise(amount, B_=B_.serialize().hex(), C_=C_.serialize().hex())
|
||||
return BlindedSignature(amount=amount, C_=C_.serialize().hex())
|
||||
|
||||
|
||||
def _check_spendable(proof: Proof, cashu_id: str = Query(None)):
|
||||
"""Checks whether the proof was already spent."""
|
||||
return not proof.secret in self.proofs_used
|
||||
|
||||
|
||||
def _verify_proof(proof: Proof, cashu_id: str = Query(None)):
|
||||
"""Verifies that the proof of promise was issued by this ledger."""
|
||||
if not self._check_spendable(proof):
|
||||
raise Exception(f"tokens already spent. Secret: {proof.secret}")
|
||||
secret_key = self.keys[proof.amount] # Get the correct key to check against
|
||||
C = PublicKey(bytes.fromhex(proof.C), raw=True)
|
||||
return verify(secret_key, C, proof.secret)
|
||||
|
||||
|
||||
def _verify_outputs(
|
||||
total: int,
|
||||
amount: int,
|
||||
output_data: List[BlindedMessage],
|
||||
cashu_id: str = Query(None),
|
||||
):
|
||||
"""Verifies the expected split was correctly computed"""
|
||||
fst_amt, snd_amt = total - amount, amount # we have two amounts to split to
|
||||
fst_outputs = amount_split(fst_amt)
|
||||
snd_outputs = amount_split(snd_amt)
|
||||
expected = fst_outputs + snd_outputs
|
||||
given = [o.amount for o in output_data]
|
||||
return given == expected
|
||||
|
||||
|
||||
def _verify_no_duplicates(
|
||||
proofs: List[Proof], output_data: List[BlindedMessage], cashu_id: str = Query(None)
|
||||
):
|
||||
secrets = [p.secret for p in proofs]
|
||||
if len(secrets) != len(list(set(secrets))):
|
||||
return False
|
||||
B_s = [od.B_ for od in output_data]
|
||||
if len(B_s) != len(list(set(B_s))):
|
||||
return False
|
||||
return True
|
||||
|
||||
|
||||
def _verify_split_amount(amount: int, cashu_id: str = Query(None)):
|
||||
"""Split amount like output amount can't be negative or too big."""
|
||||
try:
|
||||
self._verify_amount(amount)
|
||||
except:
|
||||
# For better error message
|
||||
raise Exception("invalid split amount: " + str(amount))
|
||||
|
||||
|
||||
def _verify_amount(amount: int, cashu_id: str = Query(None)):
|
||||
"""Any amount used should be a positive integer not larger than 2^MAX_ORDER."""
|
||||
valid = isinstance(amount, int) and amount > 0 and amount < 2**MAX_ORDER
|
||||
if not valid:
|
||||
raise Exception("invalid amount: " + str(amount))
|
||||
return amount
|
||||
|
||||
|
||||
def _verify_equation_balanced(
|
||||
proofs: List[Proof], outs: List[BlindedMessage], cashu_id: str = Query(None)
|
||||
):
|
||||
"""Verify that Σoutputs - Σinputs = 0."""
|
||||
sum_inputs = sum(self._verify_amount(p.amount) for p in proofs)
|
||||
sum_outputs = sum(self._verify_amount(p.amount) for p in outs)
|
||||
assert sum_outputs - sum_inputs == 0
|
||||
|
||||
|
||||
def _get_output_split(amount: int, cashu_id: str):
|
||||
"""Given an amount returns a list of amounts returned e.g. 13 is [1, 4, 8]."""
|
||||
self._verify_amount(amount)
|
||||
bits_amt = bin(amount)[::-1][:-2]
|
||||
rv = []
|
||||
for (pos, bit) in enumerate(bits_amt):
|
||||
if bit == "1":
|
||||
rv.append(2**pos)
|
||||
return rv
|
||||
|
||||
|
||||
async def _invalidate_proofs(proofs: List[Proof], cashu_id: str = Query(None)):
|
||||
"""Adds secrets of proofs to the list of knwon secrets and stores them in the db."""
|
||||
# Mark proofs as used and prepare new promises
|
||||
proof_msgs = set([p.secret for p in proofs])
|
||||
self.proofs_used |= proof_msgs
|
||||
# store in db
|
||||
for p in proofs:
|
||||
await invalidate_proof(p)
|
||||
|
||||
|
||||
def get_pubkeys(cashu_id: str = Query(None)):
|
||||
"""Returns public keys for possible amounts."""
|
||||
return {a: p.serialize().hex() for a, p in self.pub_keys.items()}
|
||||
|
||||
|
||||
async def request_mint(amount, cashu_id: str = Query(None)):
|
||||
cashu = await get_cashu(cashu_id)
|
||||
if not cashu:
|
||||
raise Exception(f"Could not find Cashu")
|
||||
|
||||
"""Returns Lightning invoice and stores it in the db."""
|
||||
payment_hash, payment_request = await create_invoice(
|
||||
wallet_id=cashu.wallet,
|
||||
amount=amount,
|
||||
memo=cashu.name,
|
||||
unhashed_description=cashu.name.encode("utf-8"),
|
||||
extra={"tag": "Cashu"},
|
||||
)
|
||||
|
||||
invoice = Invoice(
|
||||
amount=amount, pr=payment_request, hash=payment_hash, issued=False
|
||||
)
|
||||
if not payment_request or not payment_hash:
|
||||
raise Exception(f"Could not create Lightning invoice.")
|
||||
return payment_request, payment_hash
|
||||
|
||||
|
||||
async def mint(
|
||||
B_s: List[PublicKey],
|
||||
amounts: List[int],
|
||||
payment_hash: str = Query(None),
|
||||
cashu_id: str = Query(None),
|
||||
):
|
||||
cashu = await get_cashu(cashu_id)
|
||||
if not cashu:
|
||||
raise Exception(f"Could not find Cashu")
|
||||
|
||||
"""Mints a promise for coins for B_."""
|
||||
# check if lightning invoice was paid
|
||||
if payment_hash:
|
||||
if not await check_transaction_status(
|
||||
wallet_id=cashu.wallet, payment_hash=payment_hash
|
||||
):
|
||||
raise Exception("Lightning invoice not paid yet.")
|
||||
|
||||
for amount in amounts:
|
||||
if amount not in [2**i for i in range(MAX_ORDER)]:
|
||||
raise Exception(f"Can only mint amounts up to {2**MAX_ORDER}.")
|
||||
|
||||
promises = [
|
||||
await self._generate_promise(amount, B_) for B_, amount in zip(B_s, amounts)
|
||||
]
|
||||
return promises
|
||||
|
||||
|
||||
async def melt(
|
||||
proofs: List[Proof], amount: int, invoice: str, cashu_id: str = Query(None)
|
||||
):
|
||||
cashu = await get_cashu(cashu_id)
|
||||
if not cashu:
|
||||
raise Exception(f"Could not find Cashu")
|
||||
|
||||
"""Invalidates proofs and pays a Lightning invoice."""
|
||||
# if not LIGHTNING:
|
||||
total = sum([p["amount"] for p in proofs])
|
||||
# check that lightning fees are included
|
||||
assert total + fee_reserve(amount * 1000) >= amount, Exception(
|
||||
"provided proofs not enough for Lightning payment."
|
||||
)
|
||||
|
||||
status, payment_hash = await pay_invoice(
|
||||
wallet_id=link.wallet,
|
||||
payment_request=invoice,
|
||||
max_sat=amount,
|
||||
extra={"tag": "Ecash melt"},
|
||||
)
|
||||
|
||||
if status == True:
|
||||
await self._invalidate_proofs(proofs)
|
||||
return status, payment_hash
|
||||
|
||||
|
||||
async def check_spendable(proofs: List[Proof], cashu_id: str = Query(None)):
|
||||
cashu = await get_cashu(cashu_id)
|
||||
if not cashu:
|
||||
raise Exception(f"Could not find Cashu")
|
||||
|
||||
"""Checks if all provided proofs are valid and still spendable (i.e. have not been spent)."""
|
||||
return {i: self._check_spendable(p) for i, p in enumerate(proofs)}
|
||||
|
||||
|
||||
async def split(
|
||||
proofs: List[Proof],
|
||||
amount: int,
|
||||
output_data: List[BlindedMessage],
|
||||
cashu_id: str = Query(None),
|
||||
):
|
||||
cashu = await get_cashu(cashu_id)
|
||||
if not cashu:
|
||||
raise Exception(f"Could not find Cashu")
|
||||
|
||||
"""Consumes proofs and prepares new promises based on the amount split."""
|
||||
self._verify_split_amount(amount)
|
||||
# Verify proofs are valid
|
||||
if not all([self._verify_proof(p) for p in proofs]):
|
||||
return False
|
||||
|
||||
total = sum([p.amount for p in proofs])
|
||||
|
||||
if not self._verify_no_duplicates(proofs, output_data):
|
||||
raise Exception("duplicate proofs or promises")
|
||||
if amount > total:
|
||||
raise Exception("split amount is higher than the total sum")
|
||||
if not self._verify_outputs(total, amount, output_data):
|
||||
raise Exception("split of promises is not as expected")
|
||||
|
||||
# Mark proofs as used and prepare new promises
|
||||
await self._invalidate_proofs(proofs)
|
||||
|
||||
outs_fst = amount_split(total - amount)
|
||||
outs_snd = amount_split(amount)
|
||||
B_fst = [od.B_ for od in output_data[: len(outs_fst)]]
|
||||
B_snd = [od.B_ for od in output_data[len(outs_fst) :]]
|
||||
prom_fst, prom_snd = await self._generate_promises(
|
||||
outs_fst, B_fst
|
||||
), await self._generate_promises(outs_snd, B_snd)
|
||||
self._verify_equation_balanced(proofs, prom_fst + prom_snd)
|
||||
return prom_fst, prom_snd
|
||||
|
||||
|
||||
async def fee_reserve(amount_msat: int, cashu_id: str = Query(None)):
|
||||
cashu = await get_cashu(cashu_id)
|
||||
if not cashu:
|
||||
raise Exception(f"Could not find Cashu")
|
||||
|
||||
"""Function for calculating the Lightning fee reserve"""
|
||||
return max(
|
||||
int(LIGHTNING_RESERVE_FEE_MIN), int(amount_msat * LIGHTNING_FEE_PERCENT / 100.0)
|
||||
)
|
||||
|
||||
|
||||
async def amount_split(amount, cashu_id: str):
|
||||
cashu = await get_cashu(cashu_id)
|
||||
if not cashu:
|
||||
raise Exception(f"Could not find Cashu")
|
||||
|
||||
"""Given an amount returns a list of amounts returned e.g. 13 is [1, 4, 8]."""
|
||||
bits_amt = bin(amount)[::-1][:-2]
|
||||
rv = []
|
||||
for (pos, bit) in enumerate(bits_amt):
|
||||
if bit == "1":
|
||||
rv.append(2**pos)
|
||||
return rv
|
||||
|
||||
|
||||
async def hash_to_point(secret_msg, cashu_id: str = Query(None)):
|
||||
cashu = await get_cashu(cashu_id)
|
||||
if not cashu:
|
||||
raise Exception(f"Could not find Cashu")
|
||||
|
||||
"""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")
|
||||
try:
|
||||
# We construct compressed pub which has x coordinate encoded with even y
|
||||
_hash = list(_hash[:33]) # take the 33 bytes and get a list of bytes
|
||||
_hash[0] = 0x02 # set first byte to represent even y coord
|
||||
_hash = bytes(_hash)
|
||||
point = PublicKey(_hash, raw=True)
|
||||
except:
|
||||
msg = _hash
|
||||
|
||||
return point
|
||||
|
||||
|
||||
async def step1_alice(secret_msg, cashu_id: str = Query(None)):
|
||||
cashu = await get_cashu(cashu_id)
|
||||
if not cashu:
|
||||
raise Exception(f"Could not find Cashu")
|
||||
|
||||
secret_msg = secret_msg.encode("utf-8")
|
||||
Y = hash_to_point(secret_msg)
|
||||
r = PrivateKey()
|
||||
B_ = Y + r.pubkey
|
||||
return B_, r
|
||||
|
||||
|
||||
async def step2_bob(B_, a, cashu_id: str = Query(None)):
|
||||
cashu = await get_cashu(cashu_id)
|
||||
if not cashu:
|
||||
raise Exception(f"Could not find Cashu")
|
||||
|
||||
C_ = B_.mult(a)
|
||||
return C_
|
||||
|
||||
|
||||
async def step3_alice(C_, r, A, cashu_id: str = Query(None)):
|
||||
cashu = await get_cashu(cashu_id)
|
||||
if not cashu:
|
||||
raise Exception(f"Could not find Cashu")
|
||||
|
||||
C = C_ - A.mult(r)
|
||||
return C
|
||||
|
||||
|
||||
async def verify(a, C, secret_msg, cashu_id: str = Query(None)):
|
||||
cashu = await get_cashu(cashu_id)
|
||||
if not cashu:
|
||||
raise Exception(f"Could not find Cashu")
|
||||
|
||||
Y = hash_to_point(secret_msg.encode("utf-8"))
|
||||
return C == Y.mult(a)
|
||||
|
|
@ -20,6 +20,8 @@ class Extension(NamedTuple):
|
|||
icon: Optional[str] = None
|
||||
contributors: Optional[List[str]] = None
|
||||
hidden: bool = False
|
||||
migration_module: Optional[str] = None
|
||||
db_name: Optional[str] = None
|
||||
|
||||
|
||||
class ExtensionManager:
|
||||
|
|
@ -66,6 +68,8 @@ class ExtensionManager:
|
|||
config.get("icon"),
|
||||
config.get("contributors"),
|
||||
config.get("hidden") or False,
|
||||
config.get("migration_module"),
|
||||
config.get("db_name"),
|
||||
)
|
||||
)
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user