verify-signed-message

Bitcoin Signed Message Verifier

A simple Golang package with a single purpose, to verify messages signed via Bitcoin message signing (BMS).

Requirements

• Golang 1.18+

Installation

Your $PATH must contain the Go path and the Go bin path (see GoLang's getting started for more information).

Once done, you can install this package:

go get -u github.com/bitonicnl/verify-signed-message

Usage

package main

import (
    "fmt"
    
    "github.com/btcsuite/btcd/chaincfg"

    "github.com/bitonicnl/verify-signed-message/pkg"
)

func main()  {
    // Bitcoin Mainnet
    fmt.Println(verifier.Verify(verifier.SignedMessage{
        Address:   "18J72YSM9pKLvyXX1XAjFXA98zeEvxBYmw",
        Message:   "Test123",
        Signature: "Gzhfsw0ItSrrTCChykFhPujeTyAcvVxiXwywxpHmkwFiKuUR2ETbaoFcocmcSshrtdIjfm8oXlJoTOLosZp3Yc8=",
    }))

    // Bitcoin Testnet3
    fmt.Println(verifier.VerifyWithChain(verifier.SignedMessage{
        Address:   "tb1qr97cuq4kvq7plfetmxnl6kls46xaka78n2288z",
        Message:   "The outage comes at a time when bitcoin has been fast approaching new highs not seen since June 26, 2019.",
        Signature: "H/bSByRH7BW1YydfZlEx9x/nt4EAx/4A691CFlK1URbPEU5tJnTIu4emuzkgZFwC0ptvKuCnyBThnyLDCqPqT10=",
    }, &chaincfg.TestNet3Params))
}

In this example it will output true, <nil>, since the signature is valid and there are no errors.

Support

This library tries to support as many signatures as possible.

Current support:

• Any wallet that does signing like Electrum, example:
  • Electrum: P2PKH, P2WPKH and P2WPKH-P2SH
  • Coinomi: P2PKH, P2WPKH and P2WPKH-P2SH
  • Samourai: P2PKH, P2WPKH and P2WPKH-P2SH
  • Mycelium: P2PKH, P2WPKH and P2WPKH-P2SH
• Any wallet that allows for legacy address signatures (P2PKH), example:
  • Bitcoin Core
• Any wallet that follows BIP 137, example:
  • Trezor: P2PKH, P2WPKH and P2WPKH-P2SH

Currently not supported:

• Pay-to-Witness-Script-Hash (P2WSH)
• Taproot (as there is no consensus)

Contributing

Contributions, issues and feature requests are welcome.

License

Copyright © 2022 Bitonic. This project is ISC licensed.