Incorrect Encoding of `ffffffffffffffffffffffffffffffff`

[theory]

Compare the output from jxskiss/base62 to that from keys-pub/keys/encoding:

package main

import (
	"fmt"

	"github.com/jxskiss/base62"
	"github.com/keys-pub/keys/encoding"
)

func main() {
	id := []byte{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}
	fmt.Println(base62.EncodeToString(id[:]))
	fmt.Println(encoding.EncodeBase62(id[:]))
}

Output:

fffffffffffffffffffffffffH
7n42DGM5Tflk9n8mt7Fhc7

I believe keys-pub/keys/encoding is correct and jxskiss/base62 is not.

[theory]

FWIW, encoding/base64 emits _____________________w.

[theory]

Playground

[jxskiss]

The two libraries use different algorithm to do encoding, which generates different output. You may read READM.md for details about the algorithm.

[theory]

Interesting. I was just super surprised to see it be so uniform and long.