go-pulse/cmd/utils/prompt.go

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// Copyright 2020 The go-ethereum Authors
// This file is part of go-ethereum.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
// Package utils contains internal helper functions for go-ethereum commands.
package utils
import (
"fmt"
"github.com/ethereum/go-ethereum/console/prompt"
)
// GetPassPhrase displays the given text(prompt) to the user and requests some textual
// data to be entered, but one which must not be echoed out into the terminal.
// The method returns the input provided by the user.
func GetPassPhrase(text string, confirmation bool) string {
if text != "" {
fmt.Println(text)
}
password, err := prompt.Stdin.PromptPassword("Password: ")
if err != nil {
Fatalf("Failed to read password: %v", err)
}
if confirmation {
confirm, err := prompt.Stdin.PromptPassword("Repeat password: ")
if err != nil {
Fatalf("Failed to read password confirmation: %v", err)
}
if password != confirm {
Fatalf("Passwords do not match")
}
}
return password
}
// GetPassPhraseWithList retrieves the password associated with an account, either fetched
// from a list of preloaded passphrases, or requested interactively from the user.
func GetPassPhraseWithList(text string, confirmation bool, index int, passwords []string) string {
// If a list of passwords was supplied, retrieve from them
if len(passwords) > 0 {
if index < len(passwords) {
return passwords[index]
}
return passwords[len(passwords)-1]
}
// Otherwise prompt the user for the password
password := GetPassPhrase(text, confirmation)
return password
}