createwif.go

import (
	"errors"
	"fmt"

	"github.com/btcsuite/btcd/chaincfg"
	"github.com/btcsuite/btcutil"

	"github.com/btcsuite/btcutil/hdkeychain"

	"github.com/btcsuite/btcd/btcec"
	"github.com/tyler-smith/go-bip39"
)

func (h HDWallet) NewMaster(seed []byte, net *chaincfg.Params) (*btcutil.WIF, error) {
	master, err := hdkeychain.NewMaster(seed, net)
	if err != nil {
		return nil, err
	}

	//purpose, err := master.Child(84 + hdkeychain.HardenedKeyStart)
	//if err != nil {
	//	return nil, err
	//}
	//
	//coinType, err := purpose.Child(0 + hdkeychain.HardenedKeyStart)
	//if err != nil {
	//	return nil, err
	//}

	account0, err := master.Child(0 + hdkeychain.HardenedKeyStart)
	if err != nil {
		return nil, err
	}

	chainExternal, err := account0.Child(0 + hdkeychain.HardenedKeyStart)
	if err != nil {
		return nil, err
	}

	address0Key, err := chainExternal.Child(0 + hdkeychain.HardenedKeyStart)
	if err != nil {
		return nil, err
	}

	prv, err := address0Key.ECPrivKey()
	if err != nil {
		return nil, err
	}

	wif, err := btcutil.NewWIF(prv, net, true)
	if err != nil {
		return nil, err
	}
	fmt.Println("wif: ", wif)

	pubKey1, err := address0Key.ECPubKey()
	if err != nil {
		return nil, err
	}
	keyHash1 := btcutil.Hash160(pubKey1.SerializeCompressed())

	addressWitnessPubKeyHash, err := btcutil.NewAddressWitnessPubKeyHash(keyHash1, net)
	if err != nil {
		return nil, err
	}
	segwitBech321 := addressWitnessPubKeyHash.EncodeAddress()
	fmt.Println(segwitBech321)
	return wif, err
}

bitcoin-core generate wif, then import + support segwit bech32 addresses:

$ ./bitcoin-cli -regtest generatetoaddress 1 bcrt1q8cs3rc2hsjp7cgtu28q8xy77kvkh00tud09dfk

$ ./bitcoin-cli -regtest sethdseed true cQV2pMSbkQuEfJ7yKsPPPuo37w7YPLU4PPKoGhCxCTEVHhu9vadC

$ ./bitcoin-cli -regtest generatetoaddress 101 bcrt1q8cs3rc2hsjp7cgtu28q8xy77kvkh00tud09dfk