base_x
BaseX
A Crystal shard for base encoding/decoding of any given alphabet with optional bitcoin-style leading zero compression.
A note on performance
Because this library also decodes to integers, it relies on BigInt
, which implies a significant performance impact. If you are looking to decode/encode base58 and you don't need to decode to integers, wyhaines/base58.cr is a better alternative as it's a lot faster.
Supported alphabets
Base | Alphabet |
---|---|
2 | 01 |
8 | 01234567 |
11 | 0123456789a |
26 | ABCDEFGHIJKLMNOPQRSTUVWXYZ |
26 | abcdefghijklmnopqrstuvwxyz (lowercase) |
32 | ybndrfg8ejkmcpqxot1uwisza345h769 (z-base-32) |
36 | 0123456789abcdefghijklmnopqrstuvwxyz |
45 | 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ $%*+-./: |
52 | ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz |
58 | 123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz (bitcoin) |
58 | 123456789abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ (flickr) |
58 | rpshnaf39wBUDNEGHJKLM4PQRST7VWXYZ2bcdeCg65jkm8oFqi1tuvAxyz (ripple) |
62 | 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ |
67 | ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_.!~ |
Installation
- Add the dependency to your
shard.yml
:
dependencies:
base_x:
github: wout/base_x
- Run
shards install
Usage
require "base_x"
Converting bytes
BaseX::Base58.decode("6hKMCS")
# => Bytes[206, 233, 57, 134]
BaseX::Base58.encode(Bytes[206, 233, 57, 134])
# => "6hKMCS"
or:
BaseX::Base45.decode("5R%/+F5SZ6LLW+J60D")
# => Bytes[231, 5, 88, 240, 215, 89, 21, 180, 87, 179, 227, 86]
BaseX::Base45.encode(Bytes[231, 5, 88, 240, 215, 89, 21, 180, 87, 179, 227, 86])
# => "5R%/+F5SZ6LLW+J60D"
Note: BaseX::BaseXX.decode
is the same as BaseX::BaseXX.decode_bytes
.
Converting integers
BaseX::Base58.decode_int("6hKMCS")
# => 3471391110
BaseX::Base58.encode(3471391110)
# => "6hKMCS"
Using other alphabets
base_16_alphabet = "0123456789abcdef"
BaseX.decode("ff3300", base_16_alphabet)
# => Bytes[255, 51, 0]
BaseX.encode(Bytes[255, 51, 0], base_16_alphabet)
# => "ff3300"
Leading zeroes
Some protocols, such as Bitcoin, require leading zeros to be encoded. Passing true
to the third argument of BaseX::Base58.encode
will enable this behaviour.
bitcoin_address_hex = "00000000000000000000123456789ABCDEF0"
bitcoin_address_bytes = String.new(bitcoin_address_hex.hexbytes)
BaseX::Base58.encode(bitcoin_address_bytes, leading_zeroes: true)
# => 111111111143c9JGph3DZ
Development
Make sure you have Guardian.cr installed. Then run:
$ guardian
This will automatically:
- run ameba for src and spec files
- run the relevant spec for any file in the src dir
- run spec a file whenever it's saved
Contributing
- Fork it (https://github.com/wout/base_x/fork)
- Create your feature branch (
git checkout -b my-new-feature
) - Commit your changes (
git commit -am 'Add some feature'
) - Push to the branch (
git push origin my-new-feature
) - Create a new Pull Request
Contributors
- Wout - creator and maintainer
Acknowledgments
This shard pulls inspiration from the following projects:
base_x
- 12
- 1
- 0
- 0
- 2
- 4 months ago
- March 14, 2022
MIT License
Thu, 21 Nov 2024 14:34:50 GMT