导出xpub的方法

https://www.helplib.com/GitHub/article_98685

https://support.exodus.io/article/112-how-to-export-your-bitcoin-xpub-key

确定性钱包工具

https://en.bitcoin.it/wiki/Deterministic_wallet_tools

https://github.com/richardkiss/pycoin

观察者钱包服务

https://goochain.net/wallet

相关源代码

https://github.com/bitcoin/bitcoin/blob/5f7575e2636413b7d220088e8b7aca6f0d0a5cc2/src/wallet/wallet.cpp

Line 165 CPubKey CWallet::GenerateNewKey(WalletBatch &batch, bool internal)

Line 201 void CWallet::DeriveNewChildKey(WalletBatch &batch, CKeyMetadata& metadata, CKey& secret, bool internal)