bit-wasp / multisig Goto Github PK

I've included your bitcoin libraries into my codeigniter 3 project and when I try to generate wallet addresses from the Electrum's XPUB, it gives me the right results most of the time, but sometimes it doesn't.

For example with the XPUB provided in the code, results for "m/0/2" and "m/0/14" are wrong, everything else is OK.

In case of "m/0/2" your code gives me 1B3RQ4QKocRE7MFVDpMMmgyswF2DeMEfS6 and Electrum gives me 16wjYM9D46xPYHHUQp7XwotgLwT56ZPZux

In case of "m/0/14" I'm getting 1JEKgyHAb4tx5EkPpMhWzACxTVGsW2Z7Xo but Electrum gives me 14tk9sYRDXXbya6Q2ZJLs1hHZ2mcpRbybS

<?php
$xpub = 'xpub661MyMwAqRbcGtMQDiA8n7E15sH2cA6qdE1kdiQuMjdnNoCwbFMuenQh29mrER4txDBDsuJUPAUZSd9J4qpxFtNBFEzep2cJVDku9UVVAfY';

$address = BIP32::build_address($xpub, "0/2");

echo $address[0]; // Outputs 1B3RQ4QKocRE7MFVDpMMmgyswF2DeMEfS6

I tried different PHP servers (OSX, ubuntu) because I thought it's perhaps an issue with php5-gmp library but it gives me the same wrong results.

I also tried using BitcoinLib and BIP32 to generate addresses for multisig wallets (of course with different XPUBs) and there are much more wrong results (~4 out of every 20 addresses).

BTW results with XPUB from my TREZOR wallet were OK. I also checked with http://bip32.org and it shows me same addresses as Electrum does, so it seems there are some issues with your code.