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types.go
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types.go
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package client
import (
"encoding/json"
"fmt"
apiv1 "github.com/attestantio/go-eth2-client/api/v1"
"github.com/attestantio/go-eth2-client/spec"
"github.com/attestantio/go-eth2-client/spec/altair"
"github.com/attestantio/go-eth2-client/spec/phase0"
"github.com/icon-project/btp2/common/errors"
)
func checkVersion(v spec.DataVersion) error {
if v != spec.DataVersionCapella && v != spec.DataVersionDeneb {
return errors.UnsupportedError.Errorf("unsupported version %s", v)
}
return nil
}
type LightClientBootstrap struct {
Header *altair.LightClientHeader
CurrentSyncCommittee *altair.SyncCommittee
CurrentSyncCommitteeBranch [][]byte `ssz-size:"5,32"`
}
func toLightClientBootstrap(data *spec.VersionedLCBootstrap) (*LightClientBootstrap, error) {
if err := checkVersion(data.Version); err != nil {
return nil, err
}
switch data.Version {
case spec.DataVersionCapella:
d := data.Capella
return &LightClientBootstrap{
Header: d.Header.ToAltair(),
CurrentSyncCommittee: d.CurrentSyncCommittee,
CurrentSyncCommitteeBranch: d.CurrentSyncCommitteeBranch,
}, nil
case spec.DataVersionDeneb:
d := data.Deneb
return &LightClientBootstrap{
Header: d.Header.ToAltair(),
CurrentSyncCommittee: d.CurrentSyncCommittee,
CurrentSyncCommitteeBranch: d.CurrentSyncCommitteeBranch,
}, nil
default:
return nil, errors.UnsupportedError.Errorf("unsupported version %s", data.Version)
}
}
type LightClientUpdate struct {
AttestedHeader *altair.LightClientHeader
NextSyncCommittee *altair.SyncCommittee
NextSyncCommitteeBranch [][]byte
FinalizedHeader *altair.LightClientHeader
FinalityBranch [][]byte
SyncAggregate *altair.SyncAggregate
SignatureSlot phase0.Slot
}
func (l *LightClientUpdate) String() string {
data, err := json.Marshal(l)
if err != nil {
return fmt.Sprintf("ERR: %v", err)
}
return string(data)
}
func toLightClientUpdate(data *spec.VersionedLCUpdate) (*LightClientUpdate, error) {
if err := checkVersion(data.Version); err != nil {
return nil, err
}
switch data.Version {
case spec.DataVersionCapella:
d := data.Capella
return &LightClientUpdate{
AttestedHeader: d.AttestedHeader.ToAltair(),
NextSyncCommittee: d.NextSyncCommittee,
NextSyncCommitteeBranch: d.NextSyncCommitteeBranch,
FinalizedHeader: d.FinalizedHeader.ToAltair(),
FinalityBranch: d.FinalityBranch,
SyncAggregate: d.SyncAggregate,
SignatureSlot: d.SignatureSlot,
}, nil
case spec.DataVersionDeneb:
d := data.Deneb
return &LightClientUpdate{
AttestedHeader: d.AttestedHeader.ToAltair(),
NextSyncCommittee: d.NextSyncCommittee,
NextSyncCommitteeBranch: d.NextSyncCommitteeBranch,
FinalizedHeader: d.FinalizedHeader.ToAltair(),
FinalityBranch: d.FinalityBranch,
SyncAggregate: d.SyncAggregate,
SignatureSlot: d.SignatureSlot,
}, nil
default:
return nil, errors.UnsupportedError.Errorf("unsupported version %s", data.Version)
}
}
type LightClientOptimisticUpdate struct {
AttestedHeader *altair.LightClientHeader
SyncAggregate *altair.SyncAggregate
SignatureSlot phase0.Slot
blockNumber uint64
}
func (l *LightClientOptimisticUpdate) Slot() phase0.Slot {
return l.AttestedHeader.Beacon.Slot
}
func (l *LightClientOptimisticUpdate) BlockNumber() uint64 {
return l.blockNumber
}
func (l *LightClientOptimisticUpdate) ToAltair() *altair.LightClientHeader {
return l.AttestedHeader
}
func ToLightClientOptimisticUpdate(data *spec.VersionedLCOptimisticUpdate) (*LightClientOptimisticUpdate, error) {
if err := checkVersion(data.Version); err != nil {
return nil, err
}
switch data.Version {
case spec.DataVersionCapella:
d := data.Capella
return &LightClientOptimisticUpdate{
AttestedHeader: d.AttestedHeader.ToAltair(),
SyncAggregate: d.SyncAggregate,
SignatureSlot: d.SignatureSlot,
blockNumber: d.AttestedHeader.Execution.BlockNumber,
}, nil
case spec.DataVersionDeneb:
d := data.Deneb
return &LightClientOptimisticUpdate{
AttestedHeader: d.AttestedHeader.ToAltair(),
SyncAggregate: d.SyncAggregate,
SignatureSlot: d.SignatureSlot,
blockNumber: d.AttestedHeader.Execution.BlockNumber,
}, nil
default:
return nil, errors.UnsupportedError.Errorf("unsupported version %s", data.Version)
}
}
type LightClientFinalityUpdate struct {
AttestedHeader *altair.LightClientHeader
FinalizedHeader *altair.LightClientHeader
FinalityBranch [][]byte
SyncAggregate *altair.SyncAggregate
SignatureSlot phase0.Slot
FinalizedBlockNumber uint64
}
func ToLightClientFinalityUpdate(data *spec.VersionedLCFinalityUpdate) (*LightClientFinalityUpdate, error) {
if err := checkVersion(data.Version); err != nil {
return nil, err
}
switch data.Version {
case spec.DataVersionCapella:
d := data.Capella
return &LightClientFinalityUpdate{
AttestedHeader: d.AttestedHeader.ToAltair(),
FinalizedHeader: d.FinalizedHeader.ToAltair(),
FinalityBranch: d.FinalityBranch,
SyncAggregate: d.SyncAggregate,
SignatureSlot: d.SignatureSlot,
FinalizedBlockNumber: d.FinalizedHeader.Execution.BlockNumber,
}, nil
case spec.DataVersionDeneb:
d := data.Deneb
return &LightClientFinalityUpdate{
AttestedHeader: d.AttestedHeader.ToAltair(),
FinalizedHeader: d.FinalizedHeader.ToAltair(),
FinalityBranch: d.FinalityBranch,
SyncAggregate: d.SyncAggregate,
SignatureSlot: d.SignatureSlot,
FinalizedBlockNumber: d.FinalizedHeader.Execution.BlockNumber,
}, nil
default:
return nil, errors.UnsupportedError.Errorf("unsupported version %s", data.Version)
}
}
type LightClientHeader interface {
Slot() phase0.Slot
BlockNumber() uint64
ToAltair() *altair.LightClientHeader
}
type lightClientHeader struct {
beacon *phase0.BeaconBlockHeader
blockNumber uint64
}
func (l *lightClientHeader) Slot() phase0.Slot {
return l.beacon.Slot
}
func (l *lightClientHeader) BlockNumber() uint64 {
return l.blockNumber
}
func (l *lightClientHeader) ToAltair() *altair.LightClientHeader {
return &altair.LightClientHeader{Beacon: l.beacon}
}
func LightClientHeaderFromBeaconBlockHeader(bh *apiv1.BeaconBlockHeader) LightClientHeader {
return &lightClientHeader{
beacon: bh.Header.Message,
}
}