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signedblindedbeaconblock_json.go
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signedblindedbeaconblock_json.go
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// Copyright © 2023 Attestant Limited.
// 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 deneb
import (
"encoding/hex"
"encoding/json"
"fmt"
"strings"
"github.com/attestantio/go-eth2-client/spec/phase0"
"github.com/pkg/errors"
)
// signedBlindedBeaconBlockJSON is the spec representation of the struct.
type signedBlindedBeaconBlockJSON struct {
Message *BlindedBeaconBlock `json:"message"`
Signature string `json:"signature"`
}
// MarshalJSON implements json.Marshaler.
func (s *SignedBlindedBeaconBlock) MarshalJSON() ([]byte, error) {
return json.Marshal(&signedBlindedBeaconBlockJSON{
Message: s.Message,
Signature: fmt.Sprintf("%#x", s.Signature),
})
}
// UnmarshalJSON implements json.Unmarshaler.
func (s *SignedBlindedBeaconBlock) UnmarshalJSON(input []byte) error {
var data signedBlindedBeaconBlockJSON
if err := json.Unmarshal(input, &data); err != nil {
return errors.Wrap(err, "invalid JSON")
}
return s.unpack(&data)
}
func (s *SignedBlindedBeaconBlock) unpack(data *signedBlindedBeaconBlockJSON) error {
if data.Message == nil {
return errors.New("message missing")
}
s.Message = data.Message
if data.Signature == "" {
return errors.New("signature missing")
}
signature, err := hex.DecodeString(strings.TrimPrefix(data.Signature, "0x"))
if err != nil {
return errors.Wrap(err, "invalid value for signature")
}
if len(signature) != phase0.SignatureLength {
return fmt.Errorf("incorrect length %d for signature", len(signature))
}
copy(s.Signature[:], signature)
return nil
}