keys/hd/address.go
func ComputeMastersFromSeed(seed string) (string, string, string) {
	key, data := []byte("Bitcoin seed"), []byte(seed)
	secret, chain := I64(key, data)
	pubKeyBytes := PubKeyBytesFromPrivKeyBytes(secret, true)
	return HexEncode(pubKeyBytes), HexEncode(secret), HexEncode(chain)
}
func ComputeMastersFromSeed(seed string) (string, string, string) {
	key, data := []byte("Bitcoin seed"), []byte(seed)
	secret, chain := I64(key, data)
	pubKeyBytes := PubKeyBytesFromPrivKeyBytes(secret, true)
	return HexEncode(pubKeyBytes), HexEncode(secret), HexEncode(chain)
}
// ComputeMastersFromSeed returns the master public key, master secret, and chain code in hex.