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ebellocchia / bip_utils

Generation of mnemonics, seeds, private/public keys and addresses for different types of cryptocurrencies
MIT License
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Derive BCH legacy bip44 address from mnemonic #129

Closed tajelp closed 2 months ago

tajelp commented 2 months ago

Hello, if I try, for example, to derive the bitcoincash: address (m/44'/145'/0'/0/0) of the following mnemonic:

abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon art

from bip_utils import Bip39SeedGenerator, Bip39WordsNum, Bip44, Bip44Changes, Bip44Coins

mnemonic = 'abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon art'

seed_bytes = Bip39SeedGenerator(mnemonic).Generate()
bip44_mst_ctx = Bip44.FromSeed(seed_bytes, Bip44Coins.BITCOIN_CASH)
bip44_acc_ctx = bip44_mst_ctx.Purpose().Coin().Account(0)
bip44_chg_ctx = bip44_acc_ctx.Change(Bip44Changes.CHAIN_EXT)
bip44_addr_ctx = bip44_chg_ctx.AddressIndex(0)
address = bip44_addr_ctx.PublicKey().ToAddress()

I get this address:

bitcoincash:qzlpu4vqftmmufrt2zvh8v2l8kskjuwllcmx6mydzm

Now, according to this explorer, the corresponding legacy address should be:

1JLFj6EgYfabubmc6YAVq3LophY2jhrF56

But how can I derive it?

ebellocchia commented 2 months ago

Hi, you have to tell the library to use the legacy address for Bitcoin Cash:

Bip44Conf.BitcoinCashMainNet.UseLegacyAddress(True)

So, your code will be:

from bip_utils import Bip39SeedGenerator, Bip44Conf, Bip44, Bip44Changes, Bip44Coins

mnemonic = 'abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon art'

seed_bytes = Bip39SeedGenerator(mnemonic).Generate()

Bip44Conf.BitcoinCashMainNet.UseLegacyAddress(True)
bip44_mst_ctx = Bip44.FromSeed(seed_bytes, Bip44Coins.BITCOIN_CASH)
bip44_acc_ctx = bip44_mst_ctx.Purpose().Coin().Account(0)
bip44_chg_ctx = bip44_acc_ctx.Change(Bip44Changes.CHAIN_EXT)
bip44_addr_ctx = bip44_chg_ctx.AddressIndex(0)
address = bip44_addr_ctx.PublicKey().ToAddress()
print(address)
tajelp commented 2 months ago

Thank you so much for the swift reply! I truly appreciate it!