github.com/prysmaticlabs/prysm@v1.4.4/beacon-chain/rpc/prysm/v1alpha1/validator/exit.go (about)

     1  package validator
     2  
     3  import (
     4  	"context"
     5  
     6  	"github.com/prysmaticlabs/prysm/beacon-chain/core/blocks"
     7  	"github.com/prysmaticlabs/prysm/beacon-chain/core/feed"
     8  	opfeed "github.com/prysmaticlabs/prysm/beacon-chain/core/feed/operation"
     9  	ethpb "github.com/prysmaticlabs/prysm/proto/eth/v1alpha1"
    10  	"github.com/prysmaticlabs/prysm/shared/params"
    11  	"google.golang.org/grpc/codes"
    12  	"google.golang.org/grpc/status"
    13  )
    14  
    15  // ProposeExit proposes an exit for a validator.
    16  func (vs *Server) ProposeExit(ctx context.Context, req *ethpb.SignedVoluntaryExit) (*ethpb.ProposeExitResponse, error) {
    17  	if req == nil {
    18  		return nil, status.Error(codes.InvalidArgument, "nil request")
    19  	}
    20  	s, err := vs.HeadFetcher.HeadState(ctx)
    21  	if err != nil {
    22  		return nil, status.Errorf(codes.Internal, "Could not get head state: %v", err)
    23  	}
    24  	if req.Exit == nil {
    25  		return nil, status.Error(codes.InvalidArgument, "voluntary exit does not exist")
    26  	}
    27  	if req.Signature == nil || len(req.Signature) != params.BeaconConfig().BLSSignatureLength {
    28  		return nil, status.Error(codes.InvalidArgument, "invalid signature provided")
    29  	}
    30  
    31  	// Confirm the validator is eligible to exit with the parameters provided.
    32  	val, err := s.ValidatorAtIndexReadOnly(req.Exit.ValidatorIndex)
    33  	if err != nil {
    34  		return nil, status.Error(codes.InvalidArgument, "validator index exceeds validator set length")
    35  	}
    36  
    37  	if err := blocks.VerifyExitAndSignature(val, s.Slot(), s.Fork(), req, s.GenesisValidatorRoot()); err != nil {
    38  		return nil, status.Error(codes.InvalidArgument, err.Error())
    39  	}
    40  
    41  	// Send the voluntary exit to the operation feed.
    42  	vs.OperationNotifier.OperationFeed().Send(&feed.Event{
    43  		Type: opfeed.ExitReceived,
    44  		Data: &opfeed.ExitReceivedData{
    45  			Exit: req,
    46  		},
    47  	})
    48  
    49  	vs.ExitPool.InsertVoluntaryExit(ctx, s, req)
    50  
    51  	r, err := req.Exit.HashTreeRoot()
    52  	if err != nil {
    53  		return nil, status.Errorf(codes.Internal, "Could not get tree hash of exit: %v", err)
    54  	}
    55  
    56  	return &ethpb.ProposeExitResponse{
    57  		ExitRoot: r[:],
    58  	}, vs.P2P.Broadcast(ctx, req)
    59  }