bech32

README

bech32

Package bech32 provides a Go implementation of the bech32 format specified in BIP 173.

Test vectors from BIP 173 are added to ensure compatibility with the BIP.

Note this package is NOT use by the CashAddress format as that uses a different bech32 encoding. It's left here for the sheer utility of having that package.

Installation and Updating

$ go get -u github.com/bitcoinsv/bsvutil/bech32

Examples

• Bech32 decode Example Demonstrates how to decode a bech32 encoded string.
• Bech32 encode Example Demonstrates how to encode data into a bech32 string.

License

Package bech32 is licensed under the copyfree ISC License.

Documentation

Overview

Package bech32 provides a Go implementation of the bech32 format specified in BIP 173.

Bech32 strings consist of a human-readable part (hrp), followed by the separator 1, then a checksummed data part encoded using the 32 characters "qpzry9x8gf2tvdw0s3jn54khce6mua7l".

More info: https://github.com/bitcoin/bips/blob/master/bip-0173.mediawiki

Index

• func ConvertBits(data []byte, fromBits, toBits uint8, pad bool) ([]byte, error)
• func Decode(bech string) (string, []byte, error)
• func Encode(hrp string, data []byte) (string, error)

Examples

• Decode
• Encode

Functions

func ConvertBits

func ConvertBits(data []byte, fromBits, toBits uint8, pad bool) ([]byte, error)

ConvertBits converts a byte slice where each byte is encoding fromBits bits, to a byte slice where each byte is encoding toBits bits.

func Decode

func Decode(bech string) (string, []byte, error)

Decode decodes a bech32 encoded string, returning the human-readable part and the data part excluding the checksum.

Example

This example demonstrates how to decode a bech32 encoded string.

package main

import (
	"encoding/hex"
	"fmt"

	"github.com/bitcoinsv/bsvutil/bech32"
)

func main() {
	encoded := "bc1pw508d6qejxtdg4y5r3zarvary0c5xw7kw508d6qejxtdg4y5r3zarvary0c5xw7k7grplx"
	hrp, decoded, err := bech32.Decode(encoded)
	if err != nil {
		fmt.Println("Error:", err)
	}

	// Show the decoded data.
	fmt.Println("Decoded human-readable part:", hrp)
	fmt.Println("Decoded Data:", hex.EncodeToString(decoded))

}

Output:

Decoded human-readable part: bc
Decoded Data: 010e140f070d1a001912060b0d081504140311021d030c1d03040f1814060e1e160e140f070d1a001912060b0d081504140311021d030c1d03040f1814060e1e16

func Encode

func Encode(hrp string, data []byte) (string, error)

Encode encodes a byte slice into a bech32 string with the human-readable part hrb. Note that the bytes must each encode 5 bits (base32).

Example

This example demonstrates how to encode data into a bech32 string.

package main

import (
	"fmt"

	"github.com/bitcoinsv/bsvutil/bech32"
)

func main() {
	data := []byte("Test data")
	// Convert test data to base32:
	conv, err := bech32.ConvertBits(data, 8, 5, true)
	if err != nil {
		fmt.Println("Error:", err)
	}
	encoded, err := bech32.Encode("customHrp!11111q", conv)
	if err != nil {
		fmt.Println("Error:", err)
	}

	// Show the encoded data.
	fmt.Println("Encoded Data:", encoded)

}

Output:

Encoded Data: customHrp!11111q123jhxapqv3shgcgumastr