Benjamin Loison

[The extended BIP 32 derivation tests](https://github.com/dfinity/bitcoin-library/pull/26/commits/07283caeb99998c9f1185217ae86ad02ea910104#diff-1d545dab926deb09c6fc5b18d6b191c60f4912e1f3ca38e4baf56bcaf1c97f91R651-R680) are missing and failing if they are added AFAIU as: | extended public key | public key | chain code | |-----------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------|------------------------------------------------------------------| | `xpub661MyMwAqRbcFtXgS5sYJABqqG9YLmC4Q1Rdap9gSE8NqtwybGhePY2gZ29ESFjqJoCu1Rupje8YtGqsefD265TMg7usUDFdp6W1EGMcet8`...

> I think this issue is that the xpub serialization format assumes the index is exactly 4 bytes, no more or less. Probably attempting to serialize an extended key without...