/
duties.go
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/
duties.go
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package beacon_api
import (
"bytes"
"context"
"encoding/json"
"fmt"
"net/url"
"strconv"
"github.com/pkg/errors"
"github.com/prysmaticlabs/prysm/v4/beacon-chain/rpc/eth/beacon"
"github.com/prysmaticlabs/prysm/v4/beacon-chain/rpc/eth/shared"
"github.com/prysmaticlabs/prysm/v4/beacon-chain/rpc/eth/validator"
"github.com/prysmaticlabs/prysm/v4/config/params"
"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
)
type dutiesProvider interface {
GetAttesterDuties(ctx context.Context, epoch primitives.Epoch, validatorIndices []primitives.ValidatorIndex) ([]*validator.AttesterDuty, error)
GetProposerDuties(ctx context.Context, epoch primitives.Epoch) ([]*validator.ProposerDuty, error)
GetSyncDuties(ctx context.Context, epoch primitives.Epoch, validatorIndices []primitives.ValidatorIndex) ([]*validator.SyncCommitteeDuty, error)
GetCommittees(ctx context.Context, epoch primitives.Epoch) ([]*shared.Committee, error)
}
type beaconApiDutiesProvider struct {
jsonRestHandler jsonRestHandler
}
type committeeIndexSlotPair struct {
committeeIndex primitives.CommitteeIndex
slot primitives.Slot
}
func (c beaconApiValidatorClient) getDuties(ctx context.Context, in *ethpb.DutiesRequest) (*ethpb.DutiesResponse, error) {
multipleValidatorStatus, err := c.multipleValidatorStatus(ctx, ðpb.MultipleValidatorStatusRequest{PublicKeys: in.PublicKeys})
if err != nil {
return nil, errors.Wrap(err, "failed to get validator status")
}
// Sync committees are an Altair feature
fetchSyncDuties := in.Epoch >= params.BeaconConfig().AltairForkEpoch
currentEpochDuties, err := c.getDutiesForEpoch(ctx, in.Epoch, multipleValidatorStatus, fetchSyncDuties)
if err != nil {
return nil, errors.Wrapf(err, "failed to get duties for current epoch `%d`", in.Epoch)
}
nextEpochDuties, err := c.getDutiesForEpoch(ctx, in.Epoch+1, multipleValidatorStatus, fetchSyncDuties)
if err != nil {
return nil, errors.Wrapf(err, "failed to get duties for next epoch `%d`", in.Epoch+1)
}
return ðpb.DutiesResponse{
Duties: currentEpochDuties,
CurrentEpochDuties: currentEpochDuties,
NextEpochDuties: nextEpochDuties,
}, nil
}
func (c beaconApiValidatorClient) getDutiesForEpoch(
ctx context.Context,
epoch primitives.Epoch,
multipleValidatorStatus *ethpb.MultipleValidatorStatusResponse,
fetchSyncDuties bool,
) ([]*ethpb.DutiesResponse_Duty, error) {
attesterDuties, err := c.dutiesProvider.GetAttesterDuties(ctx, epoch, multipleValidatorStatus.Indices)
if err != nil {
return nil, errors.Wrapf(err, "failed to get attester duties for epoch `%d`", epoch)
}
var syncDuties []*validator.SyncCommitteeDuty
if fetchSyncDuties {
if syncDuties, err = c.dutiesProvider.GetSyncDuties(ctx, epoch, multipleValidatorStatus.Indices); err != nil {
return nil, errors.Wrapf(err, "failed to get sync duties for epoch `%d`", epoch)
}
}
var proposerDuties []*validator.ProposerDuty
if proposerDuties, err = c.dutiesProvider.GetProposerDuties(ctx, epoch); err != nil {
return nil, errors.Wrapf(err, "failed to get proposer duties for epoch `%d`", epoch)
}
committees, err := c.dutiesProvider.GetCommittees(ctx, epoch)
if err != nil {
return nil, errors.Wrapf(err, "failed to get committees for epoch `%d`", epoch)
}
// Mapping from a validator index to its attesting committee's index and slot
attesterDutiesMapping := make(map[primitives.ValidatorIndex]committeeIndexSlotPair)
for _, attesterDuty := range attesterDuties {
validatorIndex, err := strconv.ParseUint(attesterDuty.ValidatorIndex, 10, 64)
if err != nil {
return nil, errors.Wrapf(err, "failed to parse attester validator index `%s`", attesterDuty.ValidatorIndex)
}
slot, err := strconv.ParseUint(attesterDuty.Slot, 10, 64)
if err != nil {
return nil, errors.Wrapf(err, "failed to parse attester slot `%s`", attesterDuty.Slot)
}
committeeIndex, err := strconv.ParseUint(attesterDuty.CommitteeIndex, 10, 64)
if err != nil {
return nil, errors.Wrapf(err, "failed to parse attester committee index `%s`", attesterDuty.CommitteeIndex)
}
attesterDutiesMapping[primitives.ValidatorIndex(validatorIndex)] = committeeIndexSlotPair{
slot: primitives.Slot(slot),
committeeIndex: primitives.CommitteeIndex(committeeIndex),
}
}
// Mapping from a validator index to its proposal slot
proposerDutySlots := make(map[primitives.ValidatorIndex][]primitives.Slot)
for _, proposerDuty := range proposerDuties {
validatorIndex, err := strconv.ParseUint(proposerDuty.ValidatorIndex, 10, 64)
if err != nil {
return nil, errors.Wrapf(err, "failed to parse proposer validator index `%s`", proposerDuty.ValidatorIndex)
}
slot, err := strconv.ParseUint(proposerDuty.Slot, 10, 64)
if err != nil {
return nil, errors.Wrapf(err, "failed to parse proposer slot `%s`", proposerDuty.Slot)
}
proposerDutySlots[primitives.ValidatorIndex(validatorIndex)] = append(proposerDutySlots[primitives.ValidatorIndex(validatorIndex)], primitives.Slot(slot))
}
// Set containing all validator indices that are part of a sync committee for this epoch
syncDutiesMapping := make(map[primitives.ValidatorIndex]bool)
for _, syncDuty := range syncDuties {
validatorIndex, err := strconv.ParseUint(syncDuty.ValidatorIndex, 10, 64)
if err != nil {
return nil, errors.Wrapf(err, "failed to parse sync validator index `%s`", syncDuty.ValidatorIndex)
}
syncDutiesMapping[primitives.ValidatorIndex(validatorIndex)] = true
}
// Mapping from the {committeeIndex, slot} to each of the committee's validator indices
committeeMapping := make(map[committeeIndexSlotPair][]primitives.ValidatorIndex)
for _, committee := range committees {
committeeIndex, err := strconv.ParseUint(committee.Index, 10, 64)
if err != nil {
return nil, errors.Wrapf(err, "failed to parse committee index `%s`", committee.Index)
}
slot, err := strconv.ParseUint(committee.Slot, 10, 64)
if err != nil {
return nil, errors.Wrapf(err, "failed to parse slot `%s`", committee.Slot)
}
validatorIndices := make([]primitives.ValidatorIndex, len(committee.Validators))
for index, validatorIndexString := range committee.Validators {
validatorIndex, err := strconv.ParseUint(validatorIndexString, 10, 64)
if err != nil {
return nil, errors.Wrapf(err, "failed to parse committee validator index `%s`", validatorIndexString)
}
validatorIndices[index] = primitives.ValidatorIndex(validatorIndex)
}
key := committeeIndexSlotPair{
committeeIndex: primitives.CommitteeIndex(committeeIndex),
slot: primitives.Slot(slot),
}
committeeMapping[key] = validatorIndices
}
duties := make([]*ethpb.DutiesResponse_Duty, len(multipleValidatorStatus.Statuses))
for index, validatorStatus := range multipleValidatorStatus.Statuses {
validatorIndex := multipleValidatorStatus.Indices[index]
pubkey := multipleValidatorStatus.PublicKeys[index]
var attesterSlot primitives.Slot
var committeeIndex primitives.CommitteeIndex
var committeeValidatorIndices []primitives.ValidatorIndex
if committeeMappingKey, ok := attesterDutiesMapping[validatorIndex]; ok {
committeeIndex = committeeMappingKey.committeeIndex
attesterSlot = committeeMappingKey.slot
if committeeValidatorIndices, ok = committeeMapping[committeeMappingKey]; !ok {
return nil, errors.Errorf("failed to find validators for committee index `%d` and slot `%d`", committeeIndex, attesterSlot)
}
}
duties[index] = ðpb.DutiesResponse_Duty{
Committee: committeeValidatorIndices,
CommitteeIndex: committeeIndex,
AttesterSlot: attesterSlot,
ProposerSlots: proposerDutySlots[validatorIndex],
PublicKey: pubkey,
Status: validatorStatus.Status,
ValidatorIndex: validatorIndex,
IsSyncCommittee: syncDutiesMapping[validatorIndex],
}
}
return duties, nil
}
// GetCommittees retrieves the committees for the given epoch
func (c beaconApiDutiesProvider) GetCommittees(ctx context.Context, epoch primitives.Epoch) ([]*shared.Committee, error) {
committeeParams := url.Values{}
committeeParams.Add("epoch", strconv.FormatUint(uint64(epoch), 10))
committeesRequest := buildURL("/eth/v1/beacon/states/head/committees", committeeParams)
var stateCommittees beacon.GetCommitteesResponse
if _, err := c.jsonRestHandler.GetRestJsonResponse(ctx, committeesRequest, &stateCommittees); err != nil {
return nil, errors.Wrapf(err, "failed to query committees for epoch `%d`", epoch)
}
if stateCommittees.Data == nil {
return nil, errors.New("state committees data is nil")
}
for index, committee := range stateCommittees.Data {
if committee == nil {
return nil, errors.Errorf("committee at index `%d` is nil", index)
}
}
return stateCommittees.Data, nil
}
// GetAttesterDuties retrieves the attester duties for the given epoch and validatorIndices
func (c beaconApiDutiesProvider) GetAttesterDuties(ctx context.Context, epoch primitives.Epoch, validatorIndices []primitives.ValidatorIndex) ([]*validator.AttesterDuty, error) {
jsonValidatorIndices := make([]string, len(validatorIndices))
for index, validatorIndex := range validatorIndices {
jsonValidatorIndices[index] = strconv.FormatUint(uint64(validatorIndex), 10)
}
validatorIndicesBytes, err := json.Marshal(jsonValidatorIndices)
if err != nil {
return nil, errors.Wrap(err, "failed to marshal validator indices")
}
attesterDuties := &validator.GetAttesterDutiesResponse{}
if _, err := c.jsonRestHandler.PostRestJson(ctx, fmt.Sprintf("/eth/v1/validator/duties/attester/%d", epoch), nil, bytes.NewBuffer(validatorIndicesBytes), attesterDuties); err != nil {
return nil, errors.Wrap(err, "failed to send POST data to REST endpoint")
}
for index, attesterDuty := range attesterDuties.Data {
if attesterDuty == nil {
return nil, errors.Errorf("attester duty at index `%d` is nil", index)
}
}
return attesterDuties.Data, nil
}
// GetProposerDuties retrieves the proposer duties for the given epoch
func (c beaconApiDutiesProvider) GetProposerDuties(ctx context.Context, epoch primitives.Epoch) ([]*validator.ProposerDuty, error) {
proposerDuties := validator.GetProposerDutiesResponse{}
if _, err := c.jsonRestHandler.GetRestJsonResponse(ctx, fmt.Sprintf("/eth/v1/validator/duties/proposer/%d", epoch), &proposerDuties); err != nil {
return nil, errors.Wrapf(err, "failed to query proposer duties for epoch `%d`", epoch)
}
if proposerDuties.Data == nil {
return nil, errors.New("proposer duties data is nil")
}
for index, proposerDuty := range proposerDuties.Data {
if proposerDuty == nil {
return nil, errors.Errorf("proposer duty at index `%d` is nil", index)
}
}
return proposerDuties.Data, nil
}
// GetSyncDuties retrieves the sync committee duties for the given epoch and validatorIndices
func (c beaconApiDutiesProvider) GetSyncDuties(ctx context.Context, epoch primitives.Epoch, validatorIndices []primitives.ValidatorIndex) ([]*validator.SyncCommitteeDuty, error) {
jsonValidatorIndices := make([]string, len(validatorIndices))
for index, validatorIndex := range validatorIndices {
jsonValidatorIndices[index] = strconv.FormatUint(uint64(validatorIndex), 10)
}
validatorIndicesBytes, err := json.Marshal(jsonValidatorIndices)
if err != nil {
return nil, errors.Wrap(err, "failed to marshal validator indices")
}
syncDuties := validator.GetSyncCommitteeDutiesResponse{}
if _, err := c.jsonRestHandler.PostRestJson(ctx, fmt.Sprintf("/eth/v1/validator/duties/sync/%d", epoch), nil, bytes.NewBuffer(validatorIndicesBytes), &syncDuties); err != nil {
return nil, errors.Wrap(err, "failed to send POST data to REST endpoint")
}
if syncDuties.Data == nil {
return nil, errors.New("sync duties data is nil")
}
for index, syncDuty := range syncDuties.Data {
if syncDuty == nil {
return nil, errors.Errorf("sync duty at index `%d` is nil", index)
}
}
return syncDuties.Data, nil
}