user1434: I could not find documentation on using a 12-word BIP39 Mnemonic to restore a wallet through bitcoin-cli.  It seems that importprivkey might be the right RPC call but when I provide the 12 words, it says "Invalid private key encoding"  I also tried the following formats which were generated by Ian Coleman's page from https://github.com/iancoleman/bip39:
BIP39 Seed
BIP32 Root Key
Account Extended Private Key
BIP32 Extended Private Key
Perhaps the master seed mnemonic is useless if all you have is bitcoin-cli and the bitcoind to which it's attached.  Is that the case?

user48884: Bitcoin Core does not currently support BIP 39 mnemonics nor the size of the BIP 32 seed produced by a BIP 39 mnemonic. BIP 39 produces 512 bit seeds, but Bitcoin Core currently only supports importing a 256 bit seed via sethdseed.

1434: <p>I could not find documentation on using a 12-word BIP39 Mnemonic to restore a wallet through bitcoin-cli.  It seems that importprivkey might be the right RPC call but when I provide the 12 words, it says "Invalid private key encoding"  I also tried the following formats which were generated by Ian Coleman's page from <a href="https://github.com/iancoleman/bip39" rel="nofollow noreferrer">https://github.com/iancoleman/bip39</a>:</p>

<p>BIP39 Seed<br>
BIP32 Root Key<br>
Account Extended Private Key<br>
BIP32 Extended Private Key</p>

<p>Perhaps the master seed mnemonic is useless if all you have is bitcoin-cli and the bitcoind to which it's attached.  Is that the case?</p>
 48884: <p>Bitcoin Core does not currently support BIP 39 mnemonics nor the size of the BIP 32 seed produced by a BIP 39 mnemonic. BIP 39 produces 512 bit seeds, but Bitcoin Core currently only supports importing a 256 bit seed via <code>sethdseed</code>.</p>
