Base58 treats a byte sequence as one large integer and writes it with the Bitcoin alphabet 123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz. Leading zero bytes become leading 1 characters, preserving a byte-for-byte round trip.
Use Base58 for compact identifiers that people copy or type because it omits 0, O, I, and l. This is raw Bitcoin-alphabet Base58, not Base58Check: it adds no version or checksum, and other Base58 alphabets are incompatible.
// npm install bs58
import bs58 from 'bs58';
const encoded = bs58.encode(Buffer.from('Hello'));
console.log(encoded);
// Output: 9Ajdvzr
const decoded = Buffer.from(bs58.decode('9Ajdvzr')).toString('utf8');
console.log(decoded);
// Output: Hello
package main
import (
"fmt"
"github.com/btcsuite/btcutil/base58"
)
func main() {
encoded := base58.Encode([]byte("Hello"))
fmt.Println(encoded)
// Output: 9Ajdvzr
decoded := base58.Decode("9Ajdvzr")
fmt.Println(string(decoded))
// Output: Hello
}
<?php
// composer require tuupola/base58
require 'vendor/autoload.php';
use Tuupola\Base58;
$base58 = new Base58(["characters" => Base58::BITCOIN]);
$encoded = $base58->encode("Hello");
echo $encoded . "\n";
// Output: 9Ajdvzr
$decoded = $base58->decode("9Ajdvzr");
echo $decoded . "\n";
// Output: Hello