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53 lines
1.1 KiB
53 lines
1.1 KiB
package common
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import (
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"encoding/hex"
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"fmt"
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"strings"
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)
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// The main purpose of Bytes is to enable HEX-encoding for json/encoding.
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type Bytes []byte
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// Marshal needed for protobuf compatibility
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func (b Bytes) Marshal() ([]byte, error) {
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return b, nil
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}
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// Unmarshal needed for protobuf compatibility
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func (b *Bytes) Unmarshal(data []byte) error {
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*b = data
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return nil
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}
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// This is the point of Bytes.
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func (b Bytes) MarshalJSON() ([]byte, error) {
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s := strings.ToUpper(hex.EncodeToString(b))
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jb := make([]byte, len(s)+2)
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jb[0] = '"'
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copy(jb[1:], []byte(s))
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jb[1] = '"'
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return jb, nil
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}
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// This is the point of Bytes.
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func (b *Bytes) UnmarshalJSON(data []byte) error {
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if len(data) < 2 || data[0] != '"' || data[len(data)-1] != '"' {
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return fmt.Errorf("Invalid hex string: %s", data)
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}
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bytes, err := hex.DecodeString(string(data[1 : len(data)-1]))
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if err != nil {
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return err
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}
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*b = bytes
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return nil
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}
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// Allow it to fulfill various interfaces in light-client, etc...
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func (b Bytes) Bytes() []byte {
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return b
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}
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func (b Bytes) String() string {
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return strings.ToUpper(hex.EncodeToString(b))
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}
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