Ethereum: How to get xpub or mpk(bip32) for my bitcoin core wallet?

I can walk you through the process of getting an XPR (BIP 42) or MPK (BIP 36) address for your Bitcoin Core wallet. Here’s a step-by-step guide:

What are XPR and MPK?

XPR and MPK are two types of Bitcoin addresses that allow you to use your Bitcoin Core wallet with multiple Bitcoin networks, including Bitcoin and Segregated Witness (SegWit). They also allow you to use the Bitcoin Cash (BCH) network.

Why do I need an XPR or MPK?

You may need an XPR or MPK address if:

• You have a Bitcoin Core wallet that is set up to use multiple networks.

• You want to use your wallet with different Bitcoin variants, such as Bitcoin Gold or Silver.

• You want to migrate from one network (e.g. Bitcoin Cash) to another (e.g. Bitcoin).

Step-by-step instructions:

• Update your Bitcoin Core: Make sure you are running the latest version of Bitcoin Core. If you haven’t updated recently, update it using the bitcoin-core update command.

• Select your wallet configuration: Go to Settings > Wallet in the Bitcoin Core UI. Under the Wallet Settings section, select Multiple Networks. Select the networks you want your wallet to support (e.g. BTC, BCH).

• Generate or get an XPR or MPK address:

• To generate an XPR address:

• Go to bitcoinorg-tool secp256k1 GenerateKeyPair and create a new key pair.

• Select X PR as the key type (or press Enter as the default).

• The tool will output a public XPR address, e.g. xprv....

• To generate an MPK address:

• Follow steps 1-3 in the previous point to create a new key pair.

• Press “X” to select “MPK (BIP 36)” as the key type.

Tips and Considerations:

• Make sure you understand what each XPR or MPK address represents, its security implications, and any potential risks associated with using them in your wallet.

• Be careful when creating public addresses for sensitive purposes, such as spending coins or creating new wallets.

• If you are unsure about the security of an XPR or MPK address, consider consulting the Bitcoin Core documentation or seeking advice from a financial expert.

Example:

Assuming you have a Bitcoin Core wallet with multiple network settings, let’s say you want to generate an XPR address for the BTC network. You would run bitcoinorg-tool secp256k1 GenerateKeyPair and select X PR as the key type. The tool will output a public XPR address, e.g. xprv....

To get the MPK address for the BCH network, you can use the same command, but with different settings.

Remember to regularly update your wallet configuration and generate new addresses as needed to keep your Bitcoin Core wallet secure.