base-x

Fast base encoding / decoding of any given alphabet using bitcoin style leading zero compression.

WARNING: This module is NOT RFC3548 compliant, it cannot be used for base16 (hex), base32, or base64 encoding in a standards compliant manner.

Example

Base58

``javascript
import { basex } from 'base-x'
var BASE58 = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
var bs58 = basex(BASE58)

var decoded = bs58.decode('5Kd3NBUAdUnhyzenEwVLy9pBKxSwXvE9FMPyR4UKZvpe6E3AgLr')

console.log(decoded)
// =>

console.log(bs58.encode(decoded))
// => 5Kd3NBUAdUnhyzenEwVLy9pBKxSwXvE9FMPyR4UKZvpe6E3AgLr
`

$3

See below for a list of commonly recognized alphabets, and their respective base.

| base | alphabet | export |
| ---- | --------------------------------------------------------------------- | --------- |
| 2 | 01 | base2 |
| 8 | 01234567 | base8 |
| 11 | 0123456789a | base11 |
| 16 | 0123456789abcdef | base16 |
| 32 | 0123456789ABCDEFGHJKMNPQRSTVWXYZ | base32 |
| 32 | ybndrfg8ejkmcpqxot1uwisza345h769 (z-base-32) | basez32 |
| 36 | 0123456789abcdefghijklmnopqrstuvwxyz | base36 |
| 58 | 123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz | base58 |
| 62 | 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ | base62 |
| 64 | ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/ | base64 |
| 67 | ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_.!~ | base67 |

For convenience, these are exported with the names shown above. For example, the above code could be written as follows:

`javascript
import { bs58 } from 'base-x'

var decoded = bs58.decode('5Kd3NBUAdUnhyzenEwVLy9pBKxSwXvE9FMPyR4UKZvpe6E3AgLr')

console.log(decoded)
// =>

console.log(bs58.encode(decoded))
// => 5Kd3NBUAdUnhyzenEwVLy9pBKxSwXvE9FMPyR4UKZvpe6E3AgLr
``

LICENSE MIT

Adapted from https://github.com/cryptocoinjs/base-x