util.go

package client

import (
	"crypto/rand"

	"github.com/cosmos/cosmos-sdk/crypto"
	"github.com/cosmos/cosmos-sdk/crypto/keyring"
	cryptotypes "github.com/cosmos/cosmos-sdk/crypto/types"
	"github.com/pkg/errors"
	log "github.com/xlab/suplog"

	"github.com/InjectiveLabs/sdk-go/chain/crypto/hd"
)

// KeyringForPrivKey creates a temporary in-mem keyring for a PrivKey.
// Allows to init Context when the key has been provided in plaintext and parsed.
func KeyringForPrivKey(name string, privKey cryptotypes.PrivKey) (keyring.Keyring, error) {
	kb := keyring.NewInMemory(hd.EthSecp256k1Option())
	tmpPhrase := randPhrase(64)
	armored := crypto.EncryptArmorPrivKey(privKey, tmpPhrase, privKey.Type())
	err := kb.ImportPrivKey(name, armored, tmpPhrase)
	if err != nil {
		err = errors.Wrap(err, "failed to import privkey")
		return nil, err
	}

	return kb, nil
}

func randPhrase(size int) string {
	buf := make([]byte, size)
	_, err := rand.Read(buf)
	orPanic(err)

	return string(buf)
}

func orPanic(err error) {
	if err != nil {
		log.Panicln()
	}
}