mirror of https://github.com/status-im/op-geth.git
77 lines
1.3 KiB
Go
77 lines
1.3 KiB
Go
package ethtrie
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/hex"
|
|
"strings"
|
|
)
|
|
|
|
func CompactEncode(hexSlice []int) string {
|
|
terminator := 0
|
|
if hexSlice[len(hexSlice)-1] == 16 {
|
|
terminator = 1
|
|
}
|
|
|
|
if terminator == 1 {
|
|
hexSlice = hexSlice[:len(hexSlice)-1]
|
|
}
|
|
|
|
oddlen := len(hexSlice) % 2
|
|
flags := 2*terminator + oddlen
|
|
if oddlen != 0 {
|
|
hexSlice = append([]int{flags}, hexSlice...)
|
|
} else {
|
|
hexSlice = append([]int{flags, 0}, hexSlice...)
|
|
}
|
|
|
|
var buff bytes.Buffer
|
|
for i := 0; i < len(hexSlice); i += 2 {
|
|
buff.WriteByte(byte(16*hexSlice[i] + hexSlice[i+1]))
|
|
}
|
|
|
|
return buff.String()
|
|
}
|
|
|
|
func CompactDecode(str string) []int {
|
|
base := CompactHexDecode(str)
|
|
base = base[:len(base)-1]
|
|
if base[0] >= 2 {
|
|
base = append(base, 16)
|
|
}
|
|
if base[0]%2 == 1 {
|
|
base = base[1:]
|
|
} else {
|
|
base = base[2:]
|
|
}
|
|
|
|
return base
|
|
}
|
|
|
|
func CompactHexDecode(str string) []int {
|
|
base := "0123456789abcdef"
|
|
hexSlice := make([]int, 0)
|
|
|
|
enc := hex.EncodeToString([]byte(str))
|
|
for _, v := range enc {
|
|
hexSlice = append(hexSlice, strings.IndexByte(base, byte(v)))
|
|
}
|
|
hexSlice = append(hexSlice, 16)
|
|
|
|
return hexSlice
|
|
}
|
|
|
|
func DecodeCompact(key []int) string {
|
|
base := "0123456789abcdef"
|
|
var str string
|
|
|
|
for _, v := range key {
|
|
if v < 16 {
|
|
str += string(base[v])
|
|
}
|
|
}
|
|
|
|
res, _ := hex.DecodeString(str)
|
|
|
|
return string(res)
|
|
}
|