I can create Multisignature wallet electrum with 2 xpub keys.

How can I create bitcoin core to do that?

Standart use; Add a multisig address from 2 addresses

bitcoin-cli addmultisigaddress 2 "[\"16sSauSf5pF2UkUwvKGq4qjNRzBZYqgEL5\",\"171sgjn4YtPu27adkKGrdDwzRTxnRkBfKV\"]"

Is there way to do like;

bitcoin-cli addmultisigaddress 2 "[\"tpubDAenfwNu5GyCJWv8oqRAckdKMSUoZjgVF5p8WvQwHQeXjDhAHmGrPa4a4y2Fn7HF2nfCLefJanHV3ny1UY25MRVogizB2zRUdAo7Tr9XAjm\",\"tprv8erNzbjXdtYpKbKF4HeZpBCQj2W64MS2SAJCcWxgqLueSZ9KLTPZGoDTu8NugecLLqeS2RYan2f6qcexUTjp3m2HGxmpAiP48BaUz7XHxzQ\"]"


This will be mostly possible in the upcoming Bitcoin Core 0.18 release.

First you need to understand that the sequence of such paired multisig addresses (with public keys generated from 2 xpubs in lockstep) can be described in the new descriptor language.

The syntax is sh(multi(2,XPUB/*,XPUB/*)). The sh indicates P2SH embedding, multi refers to multisig, the 2 means 2 signatures are required, and the two XPUB arguments are what the public keys are drawn from.

As descriptors are intended to be safe for human communication, they need a checksum in some cases. This checksum can be computed using the getdescriptorinfo RPC command, which will append a #CHECKSUM suffix.

Once you have the descriptor, you can do multiple things with it. One is determining the corresponding addresses using deriveaddresses.

bitcoin-cli deriveaddresses "DESC" [0,1000]

Will give you the first 1001 addresses (using keys with indexed 0 through 1000) for your descriptor.

You can also import them into a wallet, all at once using the flexible importmulti RPC, which in 0.18 is extended to support descriptors.

bitcoin-cli importmulti [{"desc" : "DESC", "range" : [0, 1000], "watchonly" : true, "timestamp" : "now"}]

Will import the first 1000 addresses, together will all information necessary to recognize payments to them, and sign for spending them (excluding the private keys, of course).

  • The watchonly indicates you're aware private keys are missing, but want to import as watched anyway.
  • The timestamp indicates the first time these keys may have been used. "now" means you know the keys haven't been used yet (or you don't care about their history); alternatively you can give a timestamp as the number of seconds since UNIX epoch to specify a birth time.

Note that this will not automatically watch for more than the first 1000 addresses as they get consumed - you'll need a new import command for that (for now).

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