mirror of
https://gitlab.com/pulsechaincom/erigon-pulse.git
synced 2024-12-23 12:07:17 +00:00
231e468e19
git-subtree-dir: erigon-lib git-subtree-mainline:3c8cbda809git-subtree-split:93d9c9d9fe
104 lines
2.3 KiB
Go
104 lines
2.3 KiB
Go
/*
|
|
Copyright 2021 Erigon contributors
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package hexutility
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"encoding/hex"
|
|
)
|
|
|
|
func MustDecodeHex(in string) []byte {
|
|
in = strip0x(in)
|
|
if len(in)%2 == 1 {
|
|
in = "0" + in
|
|
}
|
|
payload, err := hex.DecodeString(in)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return payload
|
|
}
|
|
|
|
func strip0x(str string) string {
|
|
if len(str) >= 2 && str[0] == '0' && (str[1] == 'x' || str[1] == 'X') {
|
|
return str[2:]
|
|
}
|
|
return str
|
|
}
|
|
|
|
// EncodeTs encodes a TimeStamp (BlockNumber or TxNumber or other uin64) as big endian
|
|
func EncodeTs(number uint64) []byte {
|
|
enc := make([]byte, 8)
|
|
binary.BigEndian.PutUint64(enc, number)
|
|
return enc
|
|
}
|
|
|
|
// Encode encodes b as a hex string with 0x prefix.
|
|
func Encode(b []byte) string {
|
|
enc := make([]byte, len(b)*2+2)
|
|
copy(enc, "0x")
|
|
hex.Encode(enc[2:], b)
|
|
return string(enc)
|
|
}
|
|
|
|
func FromHex(s string) []byte {
|
|
if Has0xPrefix(s) {
|
|
s = s[2:]
|
|
}
|
|
if len(s)%2 == 1 {
|
|
s = "0" + s
|
|
}
|
|
return Hex2Bytes(s)
|
|
}
|
|
|
|
// Has0xPrefix validates str begins with '0x' or '0X'.
|
|
func Has0xPrefix(str string) bool {
|
|
return len(str) >= 2 && str[0] == '0' && (str[1] == 'x' || str[1] == 'X')
|
|
}
|
|
|
|
// Hex2Bytes returns the bytes represented by the hexadecimal string str.
|
|
func Hex2Bytes(str string) []byte {
|
|
h, _ := hex.DecodeString(str)
|
|
return h
|
|
}
|
|
|
|
// IsHex validates whether each byte is valid hexadecimal string.
|
|
func IsHex(str string) bool {
|
|
if len(str)%2 != 0 {
|
|
return false
|
|
}
|
|
for _, c := range []byte(str) {
|
|
if !isHexCharacter(c) {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
// isHexCharacter returns bool of c being a valid hexadecimal.
|
|
func isHexCharacter(c byte) bool {
|
|
return ('0' <= c && c <= '9') || ('a' <= c && c <= 'f') || ('A' <= c && c <= 'F')
|
|
}
|
|
|
|
func MustDecodeString(s string) []byte {
|
|
r, err := hex.DecodeString(s)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return r
|
|
}
|