Comments (2)
h4x3rotab
commented on August 25, 2024
Hi Peswani, I'm quite surprised because it's our first time to see people using Electrum as a Python library. Could you give us more information like how you run the code, so that we can easily reproduce and help figure it out?
Btw, though we do support Electrum in long term, we have another library bgoldjs-lib which is much more developer friendly. It's based on javascript, though. I'm also very happy to help if you want to know how it could be done with bgoldjs-lib.
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zebpay-peswani
commented on August 25, 2024
@h4x3rotab Thanks for the information. I am working on trezor support. elecrtumg does not support it as of now .Because trezor library is in python so I've choose electrumg for referencing. I've created my own UI as well for the wallet. my issue is how can I know that the signature belong to a particular public key in case of multisig. for this I have referenced electrumg code.
The setup is simple you need to download the electrumg code and install all the dependencies. Create a new python file in lib folder and paste below code
from ecdsa import ecdsa, util
from lib.transaction import Transaction, bh2u, SECP256k1
from lib.bitcoin import Hash, MyVerifyingKey, i2o_ECPublicKey, point_to_ser
from lib.util import bfh
raw_tx = '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'
sig = '304402201b83bd2209bc101736f60eeec3bcc1f79d45019d1829af97f5bd3210e8d8d786022020954c15372268d299b5463e1335595221e16222aee0291509a2098a0eb7fe80'
tx = Transaction(raw_tx)
sighash = Hash(bfh(tx.serialize_preimage(0)))
pubkeys, x_pubkeys = tx.get_sorted_pubkeys(tx.inputs()[0])
print(sighash.hex())
print(pubkeys)
# print(x_pubkeys)
order = ecdsa.generator_secp256k1.order()
r, s = util.sigdecode_der(bfh(sig), order)
sig_string = util.sigencode_string(r, s, order)
compressed = True
for recid in range(4):
print(recid)
public_key = MyVerifyingKey.from_signature(sig_string, recid, sighash, curve=SECP256k1)
#key = i2o_ECPublicKey(public_key.pubkey, compressed=True)
#print("=========" + key.hex() + "============")
pubkey = bh2u(point_to_ser(public_key.pubkey.point, compressed))
print(pubkey)
# print(public_key.verify_digest(sig_string, sighash, sigdecode=ecdsa.util.sigdecode_string))
print(tx.signature_count())
print(sighash.hex())
The above code take reference from Transaction class in lib\transaction.py folder exact 649 line number
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Related Issues (20)
- File->Delete HOT 1
- File->New/Restore
- View->Show Console HOT 1
- Tools->Preferences->Appearance
- test
- Can't scan qr code on macOS HOT 2
- Slow blockchain header syncing HOT 3
- Unsigned Transaction save/export error HOT 2
- Can't sign offline transactions for multi signature wallet
- ImportError: No module named 'pyblake2' HOT 2
- Add android, ios support
- Recover a 2FA wallet HOT 1
- TREZOR support broken HOT 1
- Issue opening BTG wallet
- "not verified" HOT 3
- start error then blockchain update halt(?) HOT 2
- Synchronizing issue! HOT 1
- Server is lagging HOT 1
- Is this wallet still maintained to keep BTG? HOT 1
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