prysm-pulse/validator/client/beacon-api/domain_data.go

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package beacon_api
import (
"context"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/pkg/errors"
"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/signing"
types "github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
"github.com/prysmaticlabs/prysm/v3/network/forks"
ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
)
func (c beaconApiValidatorClient) getDomainData(ctx context.Context, epoch types.Epoch, domainType [4]byte) (*ethpb.DomainResponse, error) {
// Get the fork version from the given epoch
fork, err := forks.Fork(epoch)
if err != nil {
return nil, errors.Wrapf(err, "failed to get fork version for epoch %d", epoch)
}
// Get the genesis validator root
genesis, _, err := c.genesisProvider.GetGenesis(ctx)
if err != nil {
return nil, errors.Wrap(err, "failed to get genesis info")
}
if !validRoot(genesis.GenesisValidatorsRoot) {
return nil, errors.Errorf("invalid genesis validators root: %s", genesis.GenesisValidatorsRoot)
}
genesisValidatorRoot, err := hexutil.Decode(genesis.GenesisValidatorsRoot)
if err != nil {
return nil, errors.Wrap(err, "failed to decode genesis validators root")
}
signatureDomain, err := signing.Domain(fork, epoch, domainType, genesisValidatorRoot)
if err != nil {
return nil, errors.Wrap(err, "failed to compute signature domain")
}
return &ethpb.DomainResponse{SignatureDomain: signatureDomain}, nil
}