mirror of
https://gitlab.com/pulsechaincom/prysm-pulse.git
synced 2024-12-28 14:17:17 +00:00
356 lines
12 KiB
Go
356 lines
12 KiB
Go
package beacon
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import (
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"context"
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"strconv"
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ptypes "github.com/gogo/protobuf/types"
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ethpb "github.com/prysmaticlabs/ethereumapis/eth/v1alpha1"
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"github.com/prysmaticlabs/prysm/beacon-chain/core/blocks"
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"github.com/prysmaticlabs/prysm/beacon-chain/core/feed"
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blockfeed "github.com/prysmaticlabs/prysm/beacon-chain/core/feed/block"
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statefeed "github.com/prysmaticlabs/prysm/beacon-chain/core/feed/state"
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"github.com/prysmaticlabs/prysm/beacon-chain/core/helpers"
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"github.com/prysmaticlabs/prysm/beacon-chain/db/filters"
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"github.com/prysmaticlabs/prysm/shared/bytesutil"
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"github.com/prysmaticlabs/prysm/shared/cmd"
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"github.com/prysmaticlabs/prysm/shared/pagination"
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"github.com/prysmaticlabs/prysm/shared/params"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/status"
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)
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// ListBlocks retrieves blocks by root, slot, or epoch.
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//
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// The server may return multiple blocks in the case that a slot or epoch is
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// provided as the filter criteria. The server may return an empty list when
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// no blocks in their database match the filter criteria. This RPC should
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// not return NOT_FOUND. Only one filter criteria should be used.
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func (bs *Server) ListBlocks(
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ctx context.Context, req *ethpb.ListBlocksRequest,
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) (*ethpb.ListBlocksResponse, error) {
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if int(req.PageSize) > cmd.Get().MaxRPCPageSize {
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return nil, status.Errorf(codes.InvalidArgument, "Requested page size %d can not be greater than max size %d",
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req.PageSize, cmd.Get().MaxRPCPageSize)
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}
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switch q := req.QueryFilter.(type) {
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case *ethpb.ListBlocksRequest_Epoch:
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blks, _, err := bs.BeaconDB.Blocks(ctx, filters.NewFilter().SetStartEpoch(q.Epoch).SetEndEpoch(q.Epoch))
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if err != nil {
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return nil, status.Errorf(codes.Internal, "Could not get blocks: %v", err)
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}
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numBlks := len(blks)
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if numBlks == 0 {
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return ðpb.ListBlocksResponse{
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BlockContainers: make([]*ethpb.BeaconBlockContainer, 0),
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TotalSize: 0,
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NextPageToken: strconv.Itoa(0),
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}, nil
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}
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start, end, nextPageToken, err := pagination.StartAndEndPage(req.PageToken, int(req.PageSize), numBlks)
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if err != nil {
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return nil, status.Errorf(codes.Internal, "Could not paginate blocks: %v", err)
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}
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returnedBlks := blks[start:end]
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containers := make([]*ethpb.BeaconBlockContainer, len(returnedBlks))
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for i, b := range returnedBlks {
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root, err := b.Block.HashTreeRoot()
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if err != nil {
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return nil, err
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}
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containers[i] = ðpb.BeaconBlockContainer{
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Block: b,
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BlockRoot: root[:],
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}
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}
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return ðpb.ListBlocksResponse{
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BlockContainers: containers,
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TotalSize: int32(numBlks),
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NextPageToken: nextPageToken,
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}, nil
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case *ethpb.ListBlocksRequest_Root:
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blk, err := bs.BeaconDB.Block(ctx, bytesutil.ToBytes32(q.Root))
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if err != nil {
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return nil, status.Errorf(codes.Internal, "Could not retrieve block: %v", err)
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}
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if blk == nil {
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return ðpb.ListBlocksResponse{
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BlockContainers: make([]*ethpb.BeaconBlockContainer, 0),
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TotalSize: 0,
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NextPageToken: strconv.Itoa(0),
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}, nil
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}
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root, err := blk.Block.HashTreeRoot()
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if err != nil {
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return nil, err
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}
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return ðpb.ListBlocksResponse{
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BlockContainers: []*ethpb.BeaconBlockContainer{{
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Block: blk,
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BlockRoot: root[:]},
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},
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TotalSize: 1,
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}, nil
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case *ethpb.ListBlocksRequest_Slot:
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blks, _, err := bs.BeaconDB.Blocks(ctx, filters.NewFilter().SetStartSlot(q.Slot).SetEndSlot(q.Slot))
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if err != nil {
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return nil, status.Errorf(codes.Internal, "Could not retrieve blocks for slot %d: %v", q.Slot, err)
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}
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numBlks := len(blks)
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if numBlks == 0 {
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return ðpb.ListBlocksResponse{
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BlockContainers: make([]*ethpb.BeaconBlockContainer, 0),
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TotalSize: 0,
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NextPageToken: strconv.Itoa(0),
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}, nil
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}
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start, end, nextPageToken, err := pagination.StartAndEndPage(req.PageToken, int(req.PageSize), numBlks)
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if err != nil {
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return nil, status.Errorf(codes.Internal, "Could not paginate blocks: %v", err)
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}
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returnedBlks := blks[start:end]
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containers := make([]*ethpb.BeaconBlockContainer, len(returnedBlks))
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for i, b := range returnedBlks {
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root, err := b.Block.HashTreeRoot()
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if err != nil {
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return nil, err
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}
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containers[i] = ðpb.BeaconBlockContainer{
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Block: b,
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BlockRoot: root[:],
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}
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}
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return ðpb.ListBlocksResponse{
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BlockContainers: containers,
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TotalSize: int32(numBlks),
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NextPageToken: nextPageToken,
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}, nil
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case *ethpb.ListBlocksRequest_Genesis:
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genBlk, err := bs.BeaconDB.GenesisBlock(ctx)
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if err != nil {
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return nil, status.Errorf(codes.Internal, "Could not retrieve blocks for genesis slot: %v", err)
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}
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if genBlk == nil {
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return nil, status.Error(codes.Internal, "Could not find genesis block")
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}
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root, err := genBlk.Block.HashTreeRoot()
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if err != nil {
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return nil, err
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}
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containers := []*ethpb.BeaconBlockContainer{
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{
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Block: genBlk,
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BlockRoot: root[:],
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},
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}
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return ðpb.ListBlocksResponse{
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BlockContainers: containers,
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TotalSize: int32(1),
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NextPageToken: strconv.Itoa(0),
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}, nil
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}
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return nil, status.Error(codes.InvalidArgument, "Must specify a filter criteria for fetching blocks")
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}
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// GetChainHead retrieves information about the head of the beacon chain from
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// the view of the beacon chain node.
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//
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// This includes the head block slot and root as well as information about
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// the most recent finalized and justified slots.
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func (bs *Server) GetChainHead(ctx context.Context, _ *ptypes.Empty) (*ethpb.ChainHead, error) {
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return bs.chainHeadRetrieval(ctx)
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}
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// StreamBlocks to clients every single time a block is received by the beacon node.
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func (bs *Server) StreamBlocks(_ *ptypes.Empty, stream ethpb.BeaconChain_StreamBlocksServer) error {
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blocksChannel := make(chan *feed.Event, 1)
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blockSub := bs.BlockNotifier.BlockFeed().Subscribe(blocksChannel)
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defer blockSub.Unsubscribe()
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for {
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select {
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case event := <-blocksChannel:
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if event.Type == blockfeed.ReceivedBlock {
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data, ok := event.Data.(*blockfeed.ReceivedBlockData)
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if !ok {
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// Got bad data over the stream.
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continue
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}
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if data.SignedBlock == nil {
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// One nil block shouldn't stop the stream.
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continue
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}
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headState, err := bs.HeadFetcher.HeadState(bs.Ctx)
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if err != nil {
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log.WithError(err).WithField("blockSlot", data.SignedBlock.Block.Slot).Error("Could not get head state")
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continue
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}
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if err := blocks.VerifyBlockSignature(headState, data.SignedBlock); err != nil {
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log.WithError(err).WithField("blockSlot", data.SignedBlock.Block.Slot).Error("Could not verify block signature")
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continue
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}
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if err := stream.Send(data.SignedBlock); err != nil {
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return status.Errorf(codes.Unavailable, "Could not send over stream: %v", err)
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}
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}
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case <-blockSub.Err():
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return status.Error(codes.Aborted, "Subscriber closed, exiting goroutine")
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case <-bs.Ctx.Done():
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return status.Error(codes.Canceled, "Context canceled")
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case <-stream.Context().Done():
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return status.Error(codes.Canceled, "Context canceled")
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}
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}
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}
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// StreamChainHead to clients every single time the head block and state of the chain change.
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func (bs *Server) StreamChainHead(_ *ptypes.Empty, stream ethpb.BeaconChain_StreamChainHeadServer) error {
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stateChannel := make(chan *feed.Event, 1)
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stateSub := bs.StateNotifier.StateFeed().Subscribe(stateChannel)
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defer stateSub.Unsubscribe()
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for {
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select {
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case event := <-stateChannel:
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if event.Type == statefeed.BlockProcessed {
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res, err := bs.chainHeadRetrieval(stream.Context())
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if err != nil {
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return status.Errorf(codes.Internal, "Could not retrieve chain head: %v", err)
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}
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if err := stream.Send(res); err != nil {
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return status.Errorf(codes.Unavailable, "Could not send over stream: %v", err)
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}
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}
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case <-stateSub.Err():
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return status.Error(codes.Aborted, "Subscriber closed, exiting goroutine")
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case <-bs.Ctx.Done():
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return status.Error(codes.Canceled, "Context canceled")
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case <-stream.Context().Done():
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return status.Error(codes.Canceled, "Context canceled")
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}
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}
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}
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// Retrieve chain head information from the DB and the current beacon state.
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func (bs *Server) chainHeadRetrieval(ctx context.Context) (*ethpb.ChainHead, error) {
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headBlock, err := bs.HeadFetcher.HeadBlock(ctx)
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if err != nil {
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return nil, status.Error(codes.Internal, "Could not get head block")
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}
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if headBlock == nil || headBlock.Block == nil {
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return nil, status.Error(codes.Internal, "Head block of chain was nil")
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}
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headBlockRoot, err := headBlock.Block.HashTreeRoot()
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if err != nil {
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return nil, status.Errorf(codes.Internal, "Could not get head block root: %v", err)
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}
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isGenesis := func(cp *ethpb.Checkpoint) bool {
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return bytesutil.ToBytes32(cp.Root) == params.BeaconConfig().ZeroHash && cp.Epoch == 0
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}
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// Retrieve genesis block in the event we have genesis checkpoints.
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genBlock, err := bs.BeaconDB.GenesisBlock(ctx)
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if err != nil || genBlock == nil || genBlock.Block == nil {
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return nil, status.Error(codes.Internal, "Could not get genesis block")
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}
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finalizedCheckpoint := bs.FinalizationFetcher.FinalizedCheckpt()
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if !isGenesis(finalizedCheckpoint) {
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b, err := bs.BeaconDB.Block(ctx, bytesutil.ToBytes32(finalizedCheckpoint.Root))
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if err != nil || b == nil || b.Block == nil {
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return nil, status.Error(codes.Internal, "Could not get finalized block")
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}
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}
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justifiedCheckpoint := bs.FinalizationFetcher.CurrentJustifiedCheckpt()
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if !isGenesis(justifiedCheckpoint) {
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b, err := bs.BeaconDB.Block(ctx, bytesutil.ToBytes32(justifiedCheckpoint.Root))
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if err != nil || b == nil || b.Block == nil {
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return nil, status.Error(codes.Internal, "Could not get justified block")
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}
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}
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prevJustifiedCheckpoint := bs.FinalizationFetcher.PreviousJustifiedCheckpt()
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if !isGenesis(prevJustifiedCheckpoint) {
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b, err := bs.BeaconDB.Block(ctx, bytesutil.ToBytes32(prevJustifiedCheckpoint.Root))
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if err != nil || b == nil || b.Block == nil {
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return nil, status.Error(codes.Internal, "Could not get prev justified block")
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}
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}
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fSlot, err := helpers.StartSlot(finalizedCheckpoint.Epoch)
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if err != nil {
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return nil, err
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}
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jSlot, err := helpers.StartSlot(justifiedCheckpoint.Epoch)
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if err != nil {
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return nil, err
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}
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pjSlot, err := helpers.StartSlot(prevJustifiedCheckpoint.Epoch)
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if err != nil {
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return nil, err
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}
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return ðpb.ChainHead{
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HeadSlot: headBlock.Block.Slot,
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HeadEpoch: helpers.SlotToEpoch(headBlock.Block.Slot),
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HeadBlockRoot: headBlockRoot[:],
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FinalizedSlot: fSlot,
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FinalizedEpoch: finalizedCheckpoint.Epoch,
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FinalizedBlockRoot: finalizedCheckpoint.Root,
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JustifiedSlot: jSlot,
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JustifiedEpoch: justifiedCheckpoint.Epoch,
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JustifiedBlockRoot: justifiedCheckpoint.Root,
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PreviousJustifiedSlot: pjSlot,
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PreviousJustifiedEpoch: prevJustifiedCheckpoint.Epoch,
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PreviousJustifiedBlockRoot: prevJustifiedCheckpoint.Root,
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}, nil
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}
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// GetWeakSubjectivityCheckpoint retrieves weak subjectivity state root, block root, and epoch.
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func (bs *Server) GetWeakSubjectivityCheckpoint(ctx context.Context, _ *ptypes.Empty) (*ethpb.WeakSubjectivityCheckpoint, error) {
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hs, err := bs.HeadFetcher.HeadState(ctx)
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if err != nil {
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return nil, status.Error(codes.Internal, "Could not get head state")
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}
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valCount := uint64(hs.NumValidators())
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wsEpoch, err := helpers.WeakSubjectivityCheckptEpoch(valCount)
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if err != nil {
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return nil, status.Error(codes.Internal, "Could not get weak subjectivity epoch")
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}
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wsSlot, err := helpers.StartSlot(wsEpoch)
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if err != nil {
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return nil, status.Error(codes.Internal, "Could not get weak subjectivity slot")
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}
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wsState, err := bs.StateGen.StateBySlot(ctx, wsSlot)
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if err != nil {
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return nil, status.Error(codes.Internal, "Could not get weak subjectivity state")
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}
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stateRoot, err := wsState.HashTreeRoot(ctx)
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if err != nil {
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return nil, status.Error(codes.Internal, "Could not get weak subjectivity state root")
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}
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blkRoot, err := wsState.LatestBlockHeader().HashTreeRoot()
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if err != nil {
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return nil, status.Error(codes.Internal, "Could not get weak subjectivity block root")
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}
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return ðpb.WeakSubjectivityCheckpoint{
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BlockRoot: blkRoot[:],
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StateRoot: stateRoot[:],
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Epoch: wsEpoch,
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}, nil
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}
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