/
proposerduty.go
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/
proposerduty.go
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// Copyright © 2020, 2021 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 v1
import (
"encoding/hex"
"encoding/json"
"fmt"
"strconv"
"strings"
"github.com/attestantio/go-eth2-client/spec/phase0"
"github.com/pkg/errors"
)
// ProposerDuty represents a duty of a validator to propose a slot.
type ProposerDuty struct {
PubKey phase0.BLSPubKey
Slot phase0.Slot
ValidatorIndex phase0.ValidatorIndex
}
// proposerDutyJSON is the standard API representation of the struct.
type proposerDutyJSON struct {
PubKey string `json:"pubkey"`
Slot string `json:"slot"`
ValidatorIndex string `json:"validator_index"`
}
// MarshalJSON implements json.Marshaler.
func (p *ProposerDuty) MarshalJSON() ([]byte, error) {
return json.Marshal(&proposerDutyJSON{
PubKey: fmt.Sprintf("%#x", p.PubKey),
Slot: fmt.Sprintf("%d", p.Slot),
ValidatorIndex: fmt.Sprintf("%d", p.ValidatorIndex),
})
}
// UnmarshalJSON implements json.Unmarshaler.
func (p *ProposerDuty) UnmarshalJSON(input []byte) error {
var err error
var proposerDutyJSON proposerDutyJSON
if err = json.Unmarshal(input, &proposerDutyJSON); err != nil {
return errors.Wrap(err, "invalid JSON")
}
if proposerDutyJSON.PubKey == "" {
return errors.New("public key missing")
}
pubKey, err := hex.DecodeString(strings.TrimPrefix(proposerDutyJSON.PubKey, "0x"))
if err != nil {
return errors.Wrap(err, "invalid value for public key")
}
if len(pubKey) != publicKeyLength {
return fmt.Errorf("incorrect length %d for public key", len(pubKey))
}
copy(p.PubKey[:], pubKey)
if proposerDutyJSON.Slot == "" {
return errors.New("slot missing")
}
slot, err := strconv.ParseUint(proposerDutyJSON.Slot, 10, 64)
if err != nil {
return errors.Wrap(err, "invalid value for slot")
}
p.Slot = phase0.Slot(slot)
if proposerDutyJSON.ValidatorIndex == "" {
return errors.New("validator index missing")
}
validatorIndex, err := strconv.ParseUint(proposerDutyJSON.ValidatorIndex, 10, 64)
if err != nil {
return errors.Wrap(err, "invalid value for validator index")
}
p.ValidatorIndex = phase0.ValidatorIndex(validatorIndex)
return nil
}
// String returns a string version of the structure.
func (p *ProposerDuty) String() string {
data, err := json.Marshal(p)
if err != nil {
return fmt.Sprintf("ERR: %v", err)
}
return string(data)
}