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101 lines
2.8 KiB
101 lines
2.8 KiB
package grpc
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import (
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"context"
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grpc "google.golang.org/grpc"
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"google.golang.org/grpc/status"
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"github.com/tendermint/tendermint/crypto"
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cryptoenc "github.com/tendermint/tendermint/crypto/encoding"
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"github.com/tendermint/tendermint/libs/log"
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privvalproto "github.com/tendermint/tendermint/proto/tendermint/privval"
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tmproto "github.com/tendermint/tendermint/proto/tendermint/types"
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"github.com/tendermint/tendermint/types"
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)
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// SignerClient implements PrivValidator.
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// Handles remote validator connections that provide signing services
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type SignerClient struct {
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logger log.Logger
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client privvalproto.PrivValidatorAPIClient
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conn *grpc.ClientConn
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chainID string
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}
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var _ types.PrivValidator = (*SignerClient)(nil)
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// NewSignerClient returns an instance of SignerClient.
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// it will start the endpoint (if not already started)
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func NewSignerClient(conn *grpc.ClientConn,
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chainID string, log log.Logger) (*SignerClient, error) {
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sc := &SignerClient{
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logger: log,
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chainID: chainID,
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client: privvalproto.NewPrivValidatorAPIClient(conn), // Create the Private Validator Client
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}
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return sc, nil
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}
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// Close closes the underlying connection
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func (sc *SignerClient) Close() error {
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sc.logger.Info("Stopping service")
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if sc.conn != nil {
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return sc.conn.Close()
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}
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return nil
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}
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//--------------------------------------------------------
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// Implement PrivValidator
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// GetPubKey retrieves a public key from a remote signer
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// returns an error if client is not able to provide the key
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func (sc *SignerClient) GetPubKey(ctx context.Context) (crypto.PubKey, error) {
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resp, err := sc.client.GetPubKey(ctx, &privvalproto.PubKeyRequest{ChainId: sc.chainID})
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if err != nil {
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errStatus, _ := status.FromError(err)
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sc.logger.Error("SignerClient::GetPubKey", "err", errStatus.Message())
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return nil, errStatus.Err()
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}
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pk, err := cryptoenc.PubKeyFromProto(resp.PubKey)
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if err != nil {
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return nil, err
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}
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return pk, nil
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}
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// SignVote requests a remote signer to sign a vote
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func (sc *SignerClient) SignVote(ctx context.Context, chainID string, vote *tmproto.Vote) error {
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resp, err := sc.client.SignVote(ctx, &privvalproto.SignVoteRequest{ChainId: sc.chainID, Vote: vote})
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if err != nil {
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errStatus, _ := status.FromError(err)
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sc.logger.Error("Client SignVote", "err", errStatus.Message())
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return errStatus.Err()
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}
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*vote = resp.Vote
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return nil
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}
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// SignProposal requests a remote signer to sign a proposal
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func (sc *SignerClient) SignProposal(ctx context.Context, chainID string, proposal *tmproto.Proposal) error {
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resp, err := sc.client.SignProposal(
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ctx, &privvalproto.SignProposalRequest{ChainId: chainID, Proposal: proposal})
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if err != nil {
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errStatus, _ := status.FromError(err)
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sc.logger.Error("SignerClient::SignProposal", "err", errStatus.Message())
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return errStatus.Err()
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}
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*proposal = resp.Proposal
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return nil
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}
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