47 lines
1.1 KiB
Go
47 lines
1.1 KiB
Go
package types
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import "encoding/hex"
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// has0xPrefix validates str begins with '0x' or '0X'.
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func has0xPrefix(str string) bool {
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return len(str) >= 2 && str[0] == '0' && (str[1] == 'x' || str[1] == 'X')
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}
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// isHexCharacter returns bool of c being a valid hexadecimal.
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func isHexCharacter(c byte) bool {
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return ('0' <= c && c <= '9') || ('a' <= c && c <= 'f') || ('A' <= c && c <= 'F')
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}
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// isHex validates whether each byte is valid hexadecimal string.
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func isHex(str string) bool {
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if len(str)%2 != 0 {
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return false
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}
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for _, c := range []byte(str) {
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if !isHexCharacter(c) {
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return false
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}
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}
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return true
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}
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// Bytes2Hex returns the hexadecimal encoding of d.
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func Bytes2Hex(d []byte) string {
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return hex.EncodeToString(d)
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}
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// Hex2Bytes returns the bytes represented by the hexadecimal string str.
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func Hex2Bytes(str string) []byte {
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if has0xPrefix(str) {
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str = str[2:]
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}
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h, _ := hex.DecodeString(str)
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return h
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}
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// ToHex returns the hex string representation of bytes with 0x prefix.
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func ToHex(bytes []byte) string {
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return "0x" + Bytes2Hex(bytes)
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}
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