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try fixing CData

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This commit is contained in:
Thomas Farstrike
2025-05-19 11:43:33 +02:00
parent cc9485823b
commit 849220b192
1 changed files with 21 additions and 4 deletions
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internal_filesystem/lib/secp256k1_compat.py
+21 -4
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@@ -19,12 +19,23 @@ class FFI:
NULL = None # Mimic cffi's NULL pointer
CData = CData # Expose CData class
def new(self, type_str):
def __init__(self):
# Cache type strings for identity comparison
self._types = {
'secp256k1_pubkey *': 'secp256k1_pubkey *',
'secp256k1_ecdsa_signature *': 'secp256k1_ecdsa_signature *',
'secp256k1_ecdsa_recoverable_signature *': 'secp256k1_ecdsa_recoverable_signature *',
'secp256k1_xonly_pubkey *': 'secp256k1_xonly_pubkey *',
'secp256k1_keypair *': 'secp256k1_keypair *',
}
def new(self, type_str, init=None):
if 'char' in type_str:
size = int(type_str.split('[')[1].rstrip(']'))
return CData(bytearray(size), type_str)
elif 'size_t *' in type_str:
return CData([0], type_str)
data = [init if init is not None else 0]
return CData(data, type_str)
elif type_str == 'secp256k1_pubkey *':
return CData(bytearray(64), type_str)
elif type_str == 'secp256k1_ecdsa_signature *':
@@ -60,8 +71,10 @@ class FFI:
def typeof(self, obj):
if isinstance(obj, CData):
return obj._type
raise TypeError("Object is not a CData instance")
return self._types.get(obj._type, obj._type)
if isinstance(obj, str):
return self._types.get(obj, obj)
raise TypeError("Object is not a CData instance or type string")
# Dummy lib class to map to usecp256k1 functions
class Lib:
@@ -263,6 +276,8 @@ class Lib:
try:
if isinstance(pubkey, FFI.CData):
pubkey = pubkey._data
if isinstance(outlen, FFI.CData):
outlen = outlen._data
result = usecp256k1.ec_pubkey_serialize(pubkey, flags)
if result is None:
return 0
@@ -338,6 +353,8 @@ class Lib:
xonly_pubkey = xonly_pubkey._data
if isinstance(pubkey, FFI.CData):
pubkey = pubkey._data
if isinstance(pk_parity, FFI.CData):
pk_parity = pk_parity._data
result, parity = usecp256k1.xonly_pubkey_from_pubkey(pubkey)
if result is None:
return 0