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107 lines
2.4 KiB
107 lines
2.4 KiB
package privval
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import (
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"io"
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"sync"
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cmn "github.com/tendermint/tendermint/libs/common"
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"github.com/tendermint/tendermint/types"
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)
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// ValidationRequestHandlerFunc handles different remoteSigner requests
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type ValidationRequestHandlerFunc func(
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privVal types.PrivValidator,
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requestMessage SignerMessage,
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chainID string) (SignerMessage, error)
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type SignerServer struct {
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cmn.BaseService
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endpoint *SignerDialerEndpoint
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chainID string
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privVal types.PrivValidator
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handlerMtx sync.Mutex
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validationRequestHandler ValidationRequestHandlerFunc
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}
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func NewSignerServer(endpoint *SignerDialerEndpoint, chainID string, privVal types.PrivValidator) *SignerServer {
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ss := &SignerServer{
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endpoint: endpoint,
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chainID: chainID,
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privVal: privVal,
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validationRequestHandler: DefaultValidationRequestHandler,
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}
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ss.BaseService = *cmn.NewBaseService(endpoint.Logger, "SignerServer", ss)
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return ss
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}
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// OnStart implements cmn.Service.
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func (ss *SignerServer) OnStart() error {
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go ss.serviceLoop()
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return nil
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}
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// OnStop implements cmn.Service.
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func (ss *SignerServer) OnStop() {
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ss.endpoint.Logger.Debug("SignerServer: OnStop calling Close")
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_ = ss.endpoint.Close()
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}
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// SetRequestHandler override the default function that is used to service requests
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func (ss *SignerServer) SetRequestHandler(validationRequestHandler ValidationRequestHandlerFunc) {
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ss.handlerMtx.Lock()
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defer ss.handlerMtx.Unlock()
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ss.validationRequestHandler = validationRequestHandler
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}
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func (ss *SignerServer) servicePendingRequest() {
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if !ss.IsRunning() {
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return // Ignore error from closing.
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}
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req, err := ss.endpoint.ReadMessage()
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if err != nil {
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if err != io.EOF {
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ss.Logger.Error("SignerServer: HandleMessage", "err", err)
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}
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return
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}
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var res SignerMessage
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{
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// limit the scope of the lock
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ss.handlerMtx.Lock()
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defer ss.handlerMtx.Unlock()
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res, err = ss.validationRequestHandler(ss.privVal, req, ss.chainID)
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if err != nil {
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// only log the error; we'll reply with an error in res
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ss.Logger.Error("SignerServer: handleMessage", "err", err)
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}
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}
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if res != nil {
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err = ss.endpoint.WriteMessage(res)
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if err != nil {
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ss.Logger.Error("SignerServer: writeMessage", "err", err)
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}
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}
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}
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func (ss *SignerServer) serviceLoop() {
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for {
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select {
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default:
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err := ss.endpoint.ensureConnection()
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if err != nil {
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return
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}
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ss.servicePendingRequest()
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case <-ss.Quit():
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return
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}
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}
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}
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