BIP 84 Private Key Throws Misleading Error Message

[JoePotentier]

While testing the ability to import the private key generated by Electrum Wallet on testnet I found that electrum was providing an vprv key based on the BIP 84 standard.

While passing this key in walletClient.createWallet() as the "master" key it throws the following error:

Error: Network mismatch for xprivkey.

At a minimum, this error is misleading. The vprv key is used for testnet P2WPKH addresses. While I can't expect bcoin to support every BIP standard, the error message should not mention that the network is incorrect if it does not recognize the private key format.

[pinheadmz]

BIP84 is not supported by bcoin there is an open PR to add this feature: #616