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go-base58's Introduction

go-base58

I extracted this package from https://github.com/conformal/btcutil to provide a simple base58 package that

  • defaults to base58-check (btc)
  • and allows using different alphabets.

Usage

package main

import (
  "fmt"
  b58 "github.com/jbenet/go-base58"
)

func main() {
  buf := []byte{255, 254, 253, 252}
  fmt.Printf("buffer: %v\n", buf)

  str := b58.Encode(buf)
  fmt.Printf("encoded: %s\n", str)

  buf2 := b58.Decode(str)
  fmt.Printf("decoded: %v\n", buf2)
}

Another alphabet

package main

import (
  "fmt"
  b58 "github.com/jbenet/go-base58"
)

const BogusAlphabet = "ZYXWVUTSRQPNMLKJHGFEDCBAzyxwvutsrqponmkjihgfedcba987654321"


func encdec(alphabet string) {
  fmt.Printf("using: %s\n", alphabet)

  buf := []byte{255, 254, 253, 252}
  fmt.Printf("buffer: %v\n", buf)

  str := b58.EncodeAlphabet(buf, alphabet)
  fmt.Printf("encoded: %s\n", str)

  buf2 := b58.DecodeAlphabet(str, alphabet)
  fmt.Printf("decoded: %v\n\n", buf2)
}


func main() {
  encdec(b58.BTCAlphabet)
  encdec(b58.FlickrAlphabet)
  encdec(BogusAlphabet)
}

License

Package base58 (and the original btcutil) are licensed under the ISC License.

go-base58's People

Contributors

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go-base58's Issues

second bug : )

math.Log2(256)/math.Log2(58) = 1.365658237309761
so it should be writen as
answer := make([]byte, 0, len(b)*137/100)

and if the value will be encoded is very short, you can assumed it just one byte,
len(b)*137/100 = 1 ,but we need the len is 2
so the cap should the "Ceil" of "len(b)*137/100"

therefore the final code is:
answer := make([]byte, 0, len(b)*137/100 + 1) or
answer := make([]byte, 0, math.Ceil(len(b)*137/100))

Good Luck!

first bug : )

answer := make([]byte, 0, len(b)*136/100)
should be
answer := make([]byte, 0, len(b)*136/100+1)

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