You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
541 lines
18 KiB
541 lines
18 KiB
package consensus
|
|
|
|
import (
|
|
"math/big"
|
|
"sync/atomic"
|
|
"time"
|
|
|
|
"github.com/harmony-one/harmony/crypto/bls"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
protobuf "github.com/golang/protobuf/proto"
|
|
bls_core "github.com/harmony-one/bls/ffi/go/bls"
|
|
msg_pb "github.com/harmony-one/harmony/api/proto/message"
|
|
"github.com/harmony-one/harmony/block"
|
|
consensus_engine "github.com/harmony-one/harmony/consensus/engine"
|
|
"github.com/harmony-one/harmony/consensus/quorum"
|
|
bls_cosi "github.com/harmony-one/harmony/crypto/bls"
|
|
"github.com/harmony-one/harmony/crypto/hash"
|
|
"github.com/harmony-one/harmony/internal/chain"
|
|
"github.com/harmony-one/harmony/internal/utils"
|
|
"github.com/harmony-one/harmony/multibls"
|
|
"github.com/harmony-one/harmony/shard"
|
|
"github.com/harmony-one/harmony/shard/committee"
|
|
"github.com/pkg/errors"
|
|
"github.com/rs/zerolog"
|
|
)
|
|
|
|
// WaitForNewRandomness listens to the RndChannel to receive new VDF randomness.
|
|
func (consensus *Consensus) WaitForNewRandomness() {
|
|
go func() {
|
|
for {
|
|
vdfOutput := <-consensus.RndChannel
|
|
consensus.pendingRnds = append(consensus.pendingRnds, vdfOutput)
|
|
}
|
|
}()
|
|
}
|
|
|
|
// GetNextRnd returns the oldest available randomness along with the hash of the block there randomness preimage is committed.
|
|
func (consensus *Consensus) GetNextRnd() ([vdFAndProofSize]byte, [32]byte, error) {
|
|
if len(consensus.pendingRnds) == 0 {
|
|
return [vdFAndProofSize]byte{}, [32]byte{}, errors.New("No available randomness")
|
|
}
|
|
vdfOutput := consensus.pendingRnds[0]
|
|
|
|
vdfBytes := [vdFAndProofSize]byte{}
|
|
seed := [32]byte{}
|
|
copy(vdfBytes[:], vdfOutput[:vdFAndProofSize])
|
|
copy(seed[:], vdfOutput[vdFAndProofSize:])
|
|
|
|
//pop the first vdfOutput from the list
|
|
consensus.pendingRnds = consensus.pendingRnds[1:]
|
|
|
|
return vdfBytes, seed, nil
|
|
}
|
|
|
|
var (
|
|
empty = []byte{}
|
|
)
|
|
|
|
// Signs the consensus message and returns the marshaled message.
|
|
func (consensus *Consensus) signAndMarshalConsensusMessage(message *msg_pb.Message,
|
|
priKey *bls_core.SecretKey) ([]byte, error) {
|
|
if err := consensus.signConsensusMessage(message, priKey); err != nil {
|
|
return empty, err
|
|
}
|
|
marshaledMessage, err := protobuf.Marshal(message)
|
|
if err != nil {
|
|
return empty, err
|
|
}
|
|
return marshaledMessage, nil
|
|
}
|
|
|
|
// GetViewID returns the consensus ID
|
|
func (consensus *Consensus) GetViewID() uint64 {
|
|
return consensus.viewID
|
|
}
|
|
|
|
// UpdatePublicKeys updates the PublicKeys for
|
|
// quorum on current subcommittee, protected by a mutex
|
|
func (consensus *Consensus) UpdatePublicKeys(pubKeys []bls_cosi.PublicKeyWrapper) int64 {
|
|
// TODO: use mutex for updating public keys pointer. No need to lock on all these logic.
|
|
consensus.pubKeyLock.Lock()
|
|
consensus.Decider.UpdateParticipants(pubKeys)
|
|
utils.Logger().Info().Msg("My Committee updated")
|
|
for i := range pubKeys {
|
|
utils.Logger().Debug().
|
|
Int("index", i).
|
|
Str("BLSPubKey", pubKeys[i].Bytes.Hex()).
|
|
Msg("Member")
|
|
}
|
|
|
|
allKeys := consensus.Decider.Participants()
|
|
if len(allKeys) != 0 {
|
|
consensus.LeaderPubKey = &allKeys[0]
|
|
utils.Logger().Info().
|
|
Str("info", consensus.LeaderPubKey.Bytes.Hex()).Msg("My Leader")
|
|
}
|
|
consensus.pubKeyLock.Unlock()
|
|
// reset states after update public keys
|
|
consensus.UpdateBitmaps()
|
|
consensus.ResetState()
|
|
|
|
consensus.vcLock.Lock()
|
|
consensus.ResetViewChangeState()
|
|
consensus.vcLock.Unlock()
|
|
return consensus.Decider.ParticipantsCount()
|
|
}
|
|
|
|
// NewFaker returns a faker consensus.
|
|
func NewFaker() *Consensus {
|
|
return &Consensus{}
|
|
}
|
|
|
|
// Sign on the hash of the message
|
|
func (consensus *Consensus) signMessage(message []byte, priKey *bls_core.SecretKey) []byte {
|
|
hash := hash.Keccak256(message)
|
|
signature := priKey.SignHash(hash[:])
|
|
return signature.Serialize()
|
|
}
|
|
|
|
// Sign on the consensus message signature field.
|
|
func (consensus *Consensus) signConsensusMessage(message *msg_pb.Message,
|
|
priKey *bls_core.SecretKey) error {
|
|
message.Signature = nil
|
|
marshaledMessage, err := protobuf.Marshal(message)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
// 64 byte of signature on previous data
|
|
signature := consensus.signMessage(marshaledMessage, priKey)
|
|
message.Signature = signature
|
|
return nil
|
|
}
|
|
|
|
// GetViewIDSigsArray returns the signatures for viewID in viewchange
|
|
func (consensus *Consensus) GetViewIDSigsArray(viewID uint64) []*bls_core.Sign {
|
|
sigs := []*bls_core.Sign{}
|
|
for _, sig := range consensus.viewIDSigs[viewID] {
|
|
sigs = append(sigs, sig)
|
|
}
|
|
return sigs
|
|
}
|
|
|
|
// GetNilSigsArray returns the signatures for nil prepared message in viewchange
|
|
func (consensus *Consensus) GetNilSigsArray(viewID uint64) []*bls_core.Sign {
|
|
sigs := []*bls_core.Sign{}
|
|
for _, sig := range consensus.nilSigs[viewID] {
|
|
sigs = append(sigs, sig)
|
|
}
|
|
return sigs
|
|
}
|
|
|
|
// UpdateBitmaps update the bitmaps for prepare and commit phase
|
|
func (consensus *Consensus) UpdateBitmaps() {
|
|
consensus.getLogger().Debug().
|
|
Str("Phase", consensus.phase.String()).
|
|
Msg("[UpdateBitmaps] Updating consensus bitmaps")
|
|
members := consensus.Decider.Participants()
|
|
prepareBitmap, _ := bls_cosi.NewMask(members, nil)
|
|
commitBitmap, _ := bls_cosi.NewMask(members, nil)
|
|
consensus.prepareBitmap = prepareBitmap
|
|
consensus.commitBitmap = commitBitmap
|
|
}
|
|
|
|
// ResetState resets the state of the consensus
|
|
func (consensus *Consensus) ResetState() {
|
|
consensus.getLogger().Debug().
|
|
Str("Phase", consensus.phase.String()).
|
|
Msg("[ResetState] Resetting consensus state")
|
|
consensus.switchPhase(FBFTAnnounce, true)
|
|
consensus.blockHash = [32]byte{}
|
|
consensus.block = []byte{}
|
|
consensus.Decider.ResetPrepareAndCommitVotes()
|
|
if consensus.prepareBitmap != nil {
|
|
consensus.prepareBitmap.Clear()
|
|
}
|
|
if consensus.commitBitmap != nil {
|
|
consensus.commitBitmap.Clear()
|
|
}
|
|
consensus.aggregatedPrepareSig = nil
|
|
consensus.aggregatedCommitSig = nil
|
|
}
|
|
|
|
// ToggleConsensusCheck flip the flag of whether ignore viewID check during consensus process
|
|
func (consensus *Consensus) ToggleConsensusCheck() {
|
|
consensus.IgnoreViewIDCheck.Toggle()
|
|
}
|
|
|
|
// IsValidatorInCommittee returns whether the given validator BLS address is part of my committee
|
|
func (consensus *Consensus) IsValidatorInCommittee(pubKey bls.SerializedPublicKey) bool {
|
|
return consensus.Decider.IndexOf(pubKey) != -1
|
|
}
|
|
|
|
// SetViewID set the viewID to the height of the blockchain
|
|
func (consensus *Consensus) SetViewID(height uint64) {
|
|
consensus.viewID = height
|
|
consensus.current.viewID = height
|
|
}
|
|
|
|
// SetMode sets the mode of consensus
|
|
func (consensus *Consensus) SetMode(m Mode) {
|
|
consensus.current.SetMode(m)
|
|
}
|
|
|
|
// Mode returns the mode of consensus
|
|
func (consensus *Consensus) Mode() Mode {
|
|
return consensus.current.Mode()
|
|
}
|
|
|
|
// RegisterPRndChannel registers the channel for receiving randomness preimage from DRG protocol
|
|
func (consensus *Consensus) RegisterPRndChannel(pRndChannel chan []byte) {
|
|
consensus.PRndChannel = pRndChannel
|
|
}
|
|
|
|
// RegisterRndChannel registers the channel for receiving final randomness from DRG protocol
|
|
func (consensus *Consensus) RegisterRndChannel(rndChannel chan [548]byte) {
|
|
consensus.RndChannel = rndChannel
|
|
}
|
|
|
|
// Check viewID, caller's responsibility to hold lock when change ignoreViewIDCheck
|
|
func (consensus *Consensus) checkViewID(msg *FBFTMessage) error {
|
|
// just ignore consensus check for the first time when node join
|
|
if consensus.IgnoreViewIDCheck.IsSet() {
|
|
//in syncing mode, node accepts incoming messages without viewID/leaderKey checking
|
|
//so only set mode to normal when new node enters consensus and need checking viewID
|
|
consensus.current.SetMode(Normal)
|
|
consensus.viewID = msg.ViewID
|
|
consensus.current.SetViewID(msg.ViewID)
|
|
consensus.LeaderPubKey = msg.SenderPubkey
|
|
consensus.IgnoreViewIDCheck.UnSet()
|
|
consensus.consensusTimeout[timeoutConsensus].Start()
|
|
utils.Logger().Debug().
|
|
Uint64("viewID", consensus.viewID).
|
|
Str("leaderKey", consensus.LeaderPubKey.Bytes.Hex()).
|
|
Msg("viewID and leaderKey override")
|
|
utils.Logger().Debug().
|
|
Uint64("viewID", consensus.viewID).
|
|
Uint64("block", consensus.blockNum).
|
|
Msg("Start consensus timer")
|
|
return nil
|
|
} else if msg.ViewID > consensus.viewID {
|
|
return consensus_engine.ErrViewIDNotMatch
|
|
} else if msg.ViewID < consensus.viewID {
|
|
return errors.New("view ID belongs to the past")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// SetBlockNum sets the blockNum in consensus object, called at node bootstrap
|
|
func (consensus *Consensus) SetBlockNum(blockNum uint64) {
|
|
atomic.StoreUint64(&consensus.blockNum, blockNum)
|
|
}
|
|
|
|
// ReadSignatureBitmapPayload read the payload for signature and bitmap; offset is the beginning position of reading
|
|
func (consensus *Consensus) ReadSignatureBitmapPayload(
|
|
recvPayload []byte, offset int,
|
|
) (*bls_core.Sign, *bls_cosi.Mask, error) {
|
|
if offset+bls.BLSSignatureSizeInBytes > len(recvPayload) {
|
|
return nil, nil, errors.New("payload not have enough length")
|
|
}
|
|
sigAndBitmapPayload := recvPayload[offset:]
|
|
|
|
// TODO(audit): keep a Mask in the Decider so it won't be reconstructed on the fly.
|
|
members := consensus.Decider.Participants()
|
|
return chain.ReadSignatureBitmapByPublicKeys(
|
|
sigAndBitmapPayload, members,
|
|
)
|
|
}
|
|
|
|
// getLogger returns logger for consensus contexts added
|
|
func (consensus *Consensus) getLogger() *zerolog.Logger {
|
|
logger := utils.Logger().With().
|
|
Uint64("myBlock", consensus.blockNum).
|
|
Uint64("myViewID", consensus.viewID).
|
|
Interface("phase", consensus.phase).
|
|
Str("mode", consensus.current.Mode().String()).
|
|
Logger()
|
|
return &logger
|
|
}
|
|
|
|
// retrieve corresponding blsPublicKey from Coinbase Address
|
|
func (consensus *Consensus) getLeaderPubKeyFromCoinbase(
|
|
header *block.Header,
|
|
) (*bls.PublicKeyWrapper, error) {
|
|
shardState, err := consensus.ChainReader.ReadShardState(header.Epoch())
|
|
if err != nil {
|
|
return nil, errors.Wrapf(err, "cannot read shard state %v %s",
|
|
header.Epoch(),
|
|
header.Coinbase().Hash().Hex(),
|
|
)
|
|
}
|
|
|
|
committee, err := shardState.FindCommitteeByID(header.ShardID())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
committerKey := new(bls_core.PublicKey)
|
|
isStaking := consensus.ChainReader.Config().IsStaking(header.Epoch())
|
|
for _, member := range committee.Slots {
|
|
if isStaking {
|
|
// After staking the coinbase address will be the address of bls public key
|
|
if utils.GetAddressFromBLSPubKeyBytes(member.BLSPublicKey[:]) == header.Coinbase() {
|
|
if committerKey, err = bls.BytesToBLSPublicKey(member.BLSPublicKey[:]); err != nil {
|
|
return nil, err
|
|
}
|
|
return &bls.PublicKeyWrapper{Object: committerKey, Bytes: member.BLSPublicKey}, nil
|
|
}
|
|
} else {
|
|
if member.EcdsaAddress == header.Coinbase() {
|
|
if committerKey, err = bls.BytesToBLSPublicKey(member.BLSPublicKey[:]); err != nil {
|
|
return nil, err
|
|
}
|
|
return &bls.PublicKeyWrapper{Object: committerKey, Bytes: member.BLSPublicKey}, nil
|
|
}
|
|
}
|
|
}
|
|
return nil, errors.Errorf(
|
|
"cannot find corresponding BLS Public Key coinbase %s",
|
|
header.Coinbase().Hex(),
|
|
)
|
|
}
|
|
|
|
// UpdateConsensusInformation will update shard information (epoch, publicKeys, blockNum, viewID)
|
|
// based on the local blockchain. It is called in two cases for now:
|
|
// 1. consensus object initialization. because of current dependency where chainreader is only available
|
|
// after node is initialized; node is only available after consensus is initialized
|
|
// we need call this function separately after create consensus object
|
|
// 2. after state syncing is finished
|
|
// It will return the mode:
|
|
// (a) node not in committed: Listening mode
|
|
// (b) node in committed but has any err during processing: Syncing mode
|
|
// (c) node in committed and everything looks good: Normal mode
|
|
func (consensus *Consensus) UpdateConsensusInformation() Mode {
|
|
curHeader := consensus.ChainReader.CurrentHeader()
|
|
curEpoch := curHeader.Epoch()
|
|
nextEpoch := new(big.Int).Add(curHeader.Epoch(), common.Big1)
|
|
|
|
// Overwrite nextEpoch if the shard state has a epoch number
|
|
if len(curHeader.ShardState()) > 0 {
|
|
nextShardState, err := curHeader.GetShardState()
|
|
if err != nil {
|
|
return Syncing
|
|
}
|
|
if nextShardState.Epoch != nil {
|
|
nextEpoch = nextShardState.Epoch
|
|
}
|
|
}
|
|
|
|
if consensus.ChainReader.Config().IsFiveSeconds(nextEpoch) {
|
|
consensus.BlockPeriod = time.Duration(5 * time.Second)
|
|
}
|
|
|
|
isFirstTimeStaking := consensus.ChainReader.Config().IsStaking(nextEpoch) &&
|
|
len(curHeader.ShardState()) > 0 &&
|
|
!consensus.ChainReader.Config().IsStaking(curEpoch)
|
|
haventUpdatedDecider := consensus.ChainReader.Config().IsStaking(curEpoch) &&
|
|
consensus.Decider.Policy() != quorum.SuperMajorityStake
|
|
|
|
// Only happens once, the flip-over to a new Decider policy
|
|
if isFirstTimeStaking || haventUpdatedDecider {
|
|
decider := quorum.NewDecider(quorum.SuperMajorityStake, consensus.ShardID)
|
|
decider.SetMyPublicKeyProvider(func() (multibls.PublicKeys, error) {
|
|
return consensus.GetPublicKeys(), nil
|
|
})
|
|
consensus.Decider = decider
|
|
}
|
|
|
|
var committeeToSet *shard.Committee
|
|
epochToSet := curEpoch
|
|
hasError := false
|
|
curShardState, err := committee.WithStakingEnabled.ReadFromDB(
|
|
curEpoch, consensus.ChainReader,
|
|
)
|
|
if err != nil {
|
|
utils.Logger().Error().
|
|
Err(err).
|
|
Uint32("shard", consensus.ShardID).
|
|
Msg("[UpdateConsensusInformation] Error retrieving current shard state")
|
|
return Syncing
|
|
}
|
|
|
|
consensus.getLogger().Info().Msg("[UpdateConsensusInformation] Updating.....")
|
|
// genesis block is a special case that will have shard state and needs to skip processing
|
|
isNotGenesisBlock := curHeader.Number().Cmp(big.NewInt(0)) > 0
|
|
if len(curHeader.ShardState()) > 0 && isNotGenesisBlock {
|
|
|
|
nextShardState, err := committee.WithStakingEnabled.ReadFromDB(
|
|
nextEpoch, consensus.ChainReader,
|
|
)
|
|
if err != nil {
|
|
utils.Logger().Error().
|
|
Err(err).
|
|
Uint32("shard", consensus.ShardID).
|
|
Msg("Error retrieving nextEpoch shard state")
|
|
return Syncing
|
|
}
|
|
|
|
subComm, err := nextShardState.FindCommitteeByID(curHeader.ShardID())
|
|
if err != nil {
|
|
utils.Logger().Error().
|
|
Err(err).
|
|
Uint32("shard", consensus.ShardID).
|
|
Msg("Error retrieving nextEpoch shard state")
|
|
return Syncing
|
|
}
|
|
|
|
committeeToSet = subComm
|
|
epochToSet = nextEpoch
|
|
} else {
|
|
subComm, err := curShardState.FindCommitteeByID(curHeader.ShardID())
|
|
if err != nil {
|
|
utils.Logger().Error().
|
|
Err(err).
|
|
Uint32("shard", consensus.ShardID).
|
|
Msg("Error retrieving current shard state")
|
|
return Syncing
|
|
}
|
|
|
|
committeeToSet = subComm
|
|
}
|
|
|
|
if len(committeeToSet.Slots) == 0 {
|
|
consensus.getLogger().Warn().
|
|
Msg("[UpdateConsensusInformation] No members in the committee to update")
|
|
hasError = true
|
|
}
|
|
|
|
// update public keys in the committee
|
|
oldLeader := consensus.LeaderPubKey
|
|
pubKeys, _ := committeeToSet.BLSPublicKeys()
|
|
|
|
consensus.getLogger().Info().
|
|
Int("numPubKeys", len(pubKeys)).
|
|
Msg("[UpdateConsensusInformation] Successfully updated public keys")
|
|
consensus.UpdatePublicKeys(pubKeys)
|
|
|
|
// Update voters in the committee
|
|
if _, err := consensus.Decider.SetVoters(
|
|
committeeToSet, epochToSet,
|
|
); err != nil {
|
|
utils.Logger().Error().
|
|
Err(err).
|
|
Uint32("shard", consensus.ShardID).
|
|
Msg("Error when updating voters")
|
|
return Syncing
|
|
}
|
|
|
|
utils.Logger().Info().
|
|
Uint64("block-number", curHeader.Number().Uint64()).
|
|
Uint64("curEpoch", curHeader.Epoch().Uint64()).
|
|
Uint32("shard-id", consensus.ShardID).
|
|
Msg("[UpdateConsensusInformation] changing committee")
|
|
|
|
// take care of possible leader change during the epoch
|
|
if len(curHeader.ShardState()) == 0 && curHeader.Number().Uint64() != 0 {
|
|
leaderPubKey, err := consensus.getLeaderPubKeyFromCoinbase(curHeader)
|
|
if err != nil || leaderPubKey == nil {
|
|
consensus.getLogger().Debug().Err(err).
|
|
Msg("[UpdateConsensusInformation] Unable to get leaderPubKey from coinbase")
|
|
consensus.IgnoreViewIDCheck.Set()
|
|
hasError = true
|
|
} else {
|
|
consensus.getLogger().Debug().
|
|
Str("leaderPubKey", leaderPubKey.Bytes.Hex()).
|
|
Msg("[UpdateConsensusInformation] Most Recent LeaderPubKey Updated Based on BlockChain")
|
|
consensus.LeaderPubKey = leaderPubKey
|
|
}
|
|
}
|
|
|
|
for _, key := range pubKeys {
|
|
// in committee
|
|
myPubKeys := consensus.GetPublicKeys()
|
|
if myPubKeys.Contains(key.Object) {
|
|
if hasError {
|
|
return Syncing
|
|
}
|
|
|
|
// If the leader changed and I myself become the leader
|
|
if (oldLeader != nil && consensus.LeaderPubKey != nil &&
|
|
!consensus.LeaderPubKey.Object.IsEqual(oldLeader.Object)) && consensus.IsLeader() {
|
|
go func() {
|
|
utils.Logger().Debug().
|
|
Str("myKey", myPubKeys.SerializeToHexStr()).
|
|
Uint64("viewID", consensus.viewID).
|
|
Uint64("block", consensus.blockNum).
|
|
Msg("[UpdateConsensusInformation] I am the New Leader")
|
|
consensus.ReadySignal <- struct{}{}
|
|
}()
|
|
}
|
|
return Normal
|
|
}
|
|
}
|
|
// not in committee
|
|
return Listening
|
|
}
|
|
|
|
// IsLeader check if the node is a leader or not by comparing the public key of
|
|
// the node with the leader public key
|
|
func (consensus *Consensus) IsLeader() bool {
|
|
for _, key := range consensus.priKey {
|
|
if key.Pub.Object.IsEqual(consensus.LeaderPubKey.Object) {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// NeedsRandomNumberGeneration returns true if the current epoch needs random number generation
|
|
func (consensus *Consensus) NeedsRandomNumberGeneration(epoch *big.Int) bool {
|
|
if consensus.ShardID == 0 && epoch.Uint64() >= shard.Schedule.RandomnessStartingEpoch() {
|
|
return true
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
func (consensus *Consensus) addViewIDKeyIfNotExist(viewID uint64) {
|
|
members := consensus.Decider.Participants()
|
|
if _, ok := consensus.bhpSigs[viewID]; !ok {
|
|
consensus.bhpSigs[viewID] = map[string]*bls_core.Sign{}
|
|
}
|
|
if _, ok := consensus.nilSigs[viewID]; !ok {
|
|
consensus.nilSigs[viewID] = map[string]*bls_core.Sign{}
|
|
}
|
|
if _, ok := consensus.viewIDSigs[viewID]; !ok {
|
|
consensus.viewIDSigs[viewID] = map[string]*bls_core.Sign{}
|
|
}
|
|
if _, ok := consensus.bhpBitmap[viewID]; !ok {
|
|
bhpBitmap, _ := bls_cosi.NewMask(members, nil)
|
|
consensus.bhpBitmap[viewID] = bhpBitmap
|
|
}
|
|
if _, ok := consensus.nilBitmap[viewID]; !ok {
|
|
nilBitmap, _ := bls_cosi.NewMask(members, nil)
|
|
consensus.nilBitmap[viewID] = nilBitmap
|
|
}
|
|
if _, ok := consensus.viewIDBitmap[viewID]; !ok {
|
|
viewIDBitmap, _ := bls_cosi.NewMask(members, nil)
|
|
consensus.viewIDBitmap[viewID] = viewIDBitmap
|
|
}
|
|
}
|
|
|