oracle: process requests concurrently

pkg/config/oracle_config.go

@@ -7,6 +7,7 @@ type OracleConfiguration struct {
 	Enabled               bool          `yaml:"Enabled"`
 	AllowPrivateHost      bool          `yaml:"AllowPrivateHost"`
 	Nodes                 []string      `yaml:"Nodes"`
+	MaxConcurrentRequests int           `yaml:"MaxConcurrentRequests"`
 	RequestTimeout        time.Duration `yaml:"RequestTimeout"`
 	ResponseTimeout       time.Duration `yaml:"ResponseTimeout"`
 	UnlockWallet          Wallet        `yaml:"UnlockWallet"`

pkg/services/oracle/oracle.go

@@ -34,6 +34,7 @@ type (
 		oracleSignContract []byte
 
 		close      chan struct{}
+		requestCh  chan request
 		requestMap chan map[uint64]*state.OracleRequest
 
 		// respMtx protects responses map.
@@ -93,6 +94,10 @@ func NewOracle(cfg Config) (*Oracle, error) {
 	if o.MainCfg.RequestTimeout == 0 {
 		o.MainCfg.RequestTimeout = defaultRequestTimeout
 	}
+	if o.MainCfg.MaxConcurrentRequests == 0 {
+		o.MainCfg.MaxConcurrentRequests = defaultMaxConcurrentRequests
+	}
+	o.requestCh = make(chan request, o.MainCfg.MaxConcurrentRequests)
 
 	var err error
 	w := cfg.MainCfg.UnlockWallet
@@ -136,12 +141,20 @@ func (o *Oracle) Shutdown() {
 
 // Run runs must be executed in a separate goroutine.
 func (o *Oracle) Run() {
+	for i := 0; i < o.MainCfg.MaxConcurrentRequests; i++ {
+		go o.runRequestWorker()
+	}
 	for {
 		select {
 		case <-o.close:
 			return
 		case reqs := <-o.requestMap:
-			o.ProcessRequestsInternal(reqs)
+			for id, req := range reqs {
+				o.requestCh <- request{
+					ID:  id,
+					Req: req,
+				}
+			}
 		}
 	}
 }

pkg/services/oracle/request.go

@@ -12,6 +12,31 @@ import (
 	"go.uber.org/zap"
 )
 
+const defaultMaxConcurrentRequests = 10
+
+type request struct {
+	ID  uint64
+	Req *state.OracleRequest
+}
+
+func (o *Oracle) runRequestWorker() {
+	for {
+		select {
+		case <-o.close:
+			return
+		case req := <-o.requestCh:
+			acc := o.getAccount()
+			if acc == nil {
+				continue
+			}
+			err := o.processRequest(acc.PrivateKey(), req.ID, req.Req)
+			if err != nil {
+				o.Log.Debug("can't process request", zap.Uint64("id", req.ID), zap.Error(err))
+			}
+		}
+	}
+}
+
 // RemoveRequests removes all data associated with requests
 // which have been processed by oracle contract.
 func (o *Oracle) RemoveRequests(ids []uint64) {