mirror of https://github.com/certusone/vouch.git
51 lines
1.6 KiB
Go
51 lines
1.6 KiB
Go
// Copyright © 2020 Attestant Limited.
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package standard
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import (
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"context"
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"github.com/attestantio/go-eth2-client/spec/phase0"
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"github.com/pkg/errors"
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e2wtypes "github.com/wealdtech/go-eth2-wallet-types/v2"
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)
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// SignSyncCommitteeRoot returns a root signature.
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// This signs a beacon block root with the "sync committee" domain.
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func (s *Service) SignSyncCommitteeRoot(ctx context.Context,
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account e2wtypes.Account,
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epoch phase0.Epoch,
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root phase0.Root,
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) (
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phase0.BLSSignature,
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error,
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) {
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if s.syncCommitteeDomainType == nil {
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return phase0.BLSSignature{}, errors.New("no sync committee domain type available; cannot sign")
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}
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// Calculate the domain.
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domain, err := s.domainProvider.Domain(ctx, *s.syncCommitteeDomainType, epoch)
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if err != nil {
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return phase0.BLSSignature{}, errors.Wrap(err, "failed to obtain signature domain for sync committee")
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}
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sig, err := s.sign(ctx, account, root, domain)
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if err != nil {
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return phase0.BLSSignature{}, errors.Wrap(err, "failed to sign sync committee root")
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}
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return sig, nil
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}
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