/
service.go
159 lines (137 loc) · 5.38 KB
/
service.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 standard
import (
"context"
"fmt"
eth2client "github.com/attestantio/go-eth2-client"
"github.com/attestantio/go-eth2-client/api"
"github.com/attestantio/go-eth2-client/spec/phase0"
"github.com/attestantio/vouch/services/metrics"
"github.com/pkg/errors"
"github.com/rs/zerolog"
zerologger "github.com/rs/zerolog/log"
)
// Service is the manager for signers.
type Service struct {
monitor metrics.SignerMonitor
clientMonitor metrics.ClientMonitor
slotsPerEpoch phase0.Slot
beaconProposerDomainType phase0.DomainType
beaconAttesterDomainType phase0.DomainType
randaoDomainType phase0.DomainType
selectionProofDomainType phase0.DomainType
aggregateAndProofDomainType phase0.DomainType
syncCommitteeDomainType *phase0.DomainType
syncCommitteeSelectionProofDomainType *phase0.DomainType
contributionAndProofDomainType *phase0.DomainType
applicationBuilderDomainType *phase0.DomainType
blobSidecarDomainType *phase0.DomainType
domainProvider eth2client.DomainProvider
}
// module-wide log.
var log zerolog.Logger
// New creates a new dirk account manager.
func New(ctx context.Context, params ...Parameter) (*Service, error) {
parameters, err := parseAndCheckParameters(params...)
if err != nil {
return nil, errors.Wrap(err, "problem with parameters")
}
// Set logging.
log = zerologger.With().Str("service", "signer").Str("impl", "standard").Logger()
if parameters.logLevel != log.GetLevel() {
log = log.Level(parameters.logLevel)
}
specResponse, err := parameters.specProvider.Spec(ctx, &api.SpecOpts{})
if err != nil {
return nil, errors.Wrap(err, "failed to obtain spec")
}
spec := specResponse.Data
tmp, exists := spec["SLOTS_PER_EPOCH"]
if !exists {
return nil, errors.New("SLOTS_PER_EPOCH not found in spec")
}
slotsPerEpoch, ok := tmp.(uint64)
if !ok {
return nil, errors.New("SLOTS_PER_EPOCH of unexpected type")
}
beaconAttesterDomainType, err := domainType(spec, "DOMAIN_BEACON_ATTESTER")
if err != nil {
return nil, err
}
beaconProposerDomainType, err := domainType(spec, "DOMAIN_BEACON_PROPOSER")
if err != nil {
return nil, err
}
randaoDomainType, err := domainType(spec, "DOMAIN_RANDAO")
if err != nil {
return nil, err
}
selectionProofDomainType, err := domainType(spec, "DOMAIN_SELECTION_PROOF")
if err != nil {
return nil, err
}
aggregateAndProofDomainType, err := domainType(spec, "DOMAIN_AGGREGATE_AND_PROOF")
if err != nil {
return nil, err
}
// The following are optional.
var syncCommitteeDomainType *phase0.DomainType
if tmp, err := domainType(spec, "DOMAIN_SYNC_COMMITTEE"); err == nil {
syncCommitteeDomainType = &tmp
}
var syncCommitteeSelectionProofDomainType *phase0.DomainType
if tmp, err := domainType(spec, "DOMAIN_SYNC_COMMITTEE_SELECTION_PROOF"); err == nil {
syncCommitteeSelectionProofDomainType = &tmp
}
var contributionAndProofDomainType *phase0.DomainType
if tmp, err := domainType(spec, "DOMAIN_CONTRIBUTION_AND_PROOF"); err == nil {
contributionAndProofDomainType = &tmp
}
var applicationBuilderDomainType *phase0.DomainType
if tmp, err := domainType(spec, "DOMAIN_APPLICATION_BUILDER"); err == nil {
applicationBuilderDomainType = &tmp
}
var blobSidecarDomainType *phase0.DomainType
if tmp, err := domainType(spec, "DOMAIN_BLOB_SIDECAR"); err == nil {
blobSidecarDomainType = &tmp
}
s := &Service{
monitor: parameters.monitor,
clientMonitor: parameters.clientMonitor,
slotsPerEpoch: phase0.Slot(slotsPerEpoch),
beaconAttesterDomainType: beaconAttesterDomainType,
beaconProposerDomainType: beaconProposerDomainType,
randaoDomainType: randaoDomainType,
selectionProofDomainType: selectionProofDomainType,
aggregateAndProofDomainType: aggregateAndProofDomainType,
syncCommitteeDomainType: syncCommitteeDomainType,
syncCommitteeSelectionProofDomainType: syncCommitteeSelectionProofDomainType,
contributionAndProofDomainType: contributionAndProofDomainType,
applicationBuilderDomainType: applicationBuilderDomainType,
blobSidecarDomainType: blobSidecarDomainType,
domainProvider: parameters.domainProvider,
}
return s, nil
}
func domainType(spec map[string]interface{}, input string) (phase0.DomainType, error) {
tmp, exists := spec[input]
if !exists {
return phase0.DomainType{}, fmt.Errorf("%v not found in spec", input)
}
domainType, ok := tmp.(phase0.DomainType)
if !ok {
return phase0.DomainType{}, fmt.Errorf("%v of unexpected type", input)
}
return domainType, nil
}