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proposerslashing.go
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proposerslashing.go
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// Copyright © 2020 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 phase0
import (
"bytes"
"encoding/json"
"fmt"
"github.com/goccy/go-yaml"
"github.com/pkg/errors"
)
// ProposerSlashing provides information about a proposer slashing
type ProposerSlashing struct {
SignedHeader1 *SignedBeaconBlockHeader
SignedHeader2 *SignedBeaconBlockHeader
}
// proposerSlashingJSON is the spec representation of the struct.
type proposerSlashingJSON struct {
SignedHeader1 *SignedBeaconBlockHeader `json:"signed_header_1"`
SignedHeader2 *SignedBeaconBlockHeader `json:"signed_header_2"`
}
// proposerSlashingYAML is the spec representation of the struct.
type proposerSlashingYAML struct {
SignedHeader1 *SignedBeaconBlockHeader `yaml:"signed_header_1"`
SignedHeader2 *SignedBeaconBlockHeader `yaml:"signed_header_2"`
}
// MarshalJSON implements json.Marshaler.
func (p *ProposerSlashing) MarshalJSON() ([]byte, error) {
return json.Marshal(&proposerSlashingJSON{
SignedHeader1: p.SignedHeader1,
SignedHeader2: p.SignedHeader2,
})
}
// UnmarshalJSON implements json.Unmarshaler.
func (p *ProposerSlashing) UnmarshalJSON(input []byte) error {
var proposerSlashingJSON proposerSlashingJSON
if err := json.Unmarshal(input, &proposerSlashingJSON); err != nil {
return errors.Wrap(err, "invalid JSON")
}
return p.unpack(&proposerSlashingJSON)
}
func (p *ProposerSlashing) unpack(proposerSlashingJSON *proposerSlashingJSON) error {
if proposerSlashingJSON.SignedHeader1 == nil {
return errors.New("signed header 1 missing")
}
p.SignedHeader1 = proposerSlashingJSON.SignedHeader1
if proposerSlashingJSON.SignedHeader2 == nil {
return errors.New("signed header 2 missing")
}
p.SignedHeader2 = proposerSlashingJSON.SignedHeader2
return nil
}
// MarshalYAML implements yaml.Marshaler.
func (p *ProposerSlashing) MarshalYAML() ([]byte, error) {
yamlBytes, err := yaml.MarshalWithOptions(&proposerSlashingYAML{
SignedHeader1: p.SignedHeader1,
SignedHeader2: p.SignedHeader2,
}, yaml.Flow(true))
if err != nil {
return nil, err
}
return bytes.ReplaceAll(yamlBytes, []byte(`"`), []byte(`'`)), nil
}
// UnmarshalYAML implements yaml.Unmarshaler.
func (p *ProposerSlashing) UnmarshalYAML(input []byte) error {
// We unmarshal to the JSON struct to save on duplicate code.
var proposerSlashingJSON proposerSlashingJSON
if err := yaml.Unmarshal(input, &proposerSlashingJSON); err != nil {
return err
}
return p.unpack(&proposerSlashingJSON)
}
// String returns a string version of the structure.
func (p *ProposerSlashing) String() string {
data, err := yaml.Marshal(p)
if err != nil {
return fmt.Sprintf("ERR: %v", err)
}
return string(data)
}