chore: check IsFinalized on callback function to prevent creating red…

…undant tasks

cmd/bridge/config.go

@@ -0,0 +1 @@
+package main

cmd/bridge/config_test.go

@@ -0,0 +1 @@
+package main

listener/ronin.go

@@ -309,6 +309,20 @@ func (l *RoninListener) RandomSeedRequestedCallback(fromChainId *big.Int, tx bri
 	if err = l.utilsWrapper.UnpackLog(*contractAbi, event, "RandomSeedRequested", data); err != nil {
 		return err
 	}
+	// call to contract to see if the request is finalized or not?
+	caller, err := contract.NewRoninVRFCoordinatorCaller(common.HexToAddress(task.VRFConfig.ContractAddress), l.client)
+	if err != nil {
+		log.Error("error while init new VRF caller", "err", err, "contractAddress", task.VRFConfig.ContractAddress)
+		return err
+	}
+	isFinalized, err := task.IsFinalized(caller, event.ReqHash)
+	if err != nil {
+		log.Error("error while checking random request is finalized or not", "err", err)
+		return err
+	}
+	if isFinalized {
+		return nil
+	}
 	// get chainID
 	chainId, err := l.GetChainID()
 	if err != nil {

task/vrf.go

@@ -39,7 +39,7 @@ func (r *task) sendFullFillRandomSeedTransactions(task *models.Task) (doneTasks,
 		goto ERROR
 	}
 	// req is finalized, GOTO update done
-	finalized, err = isFinalized(caller, event.ReqHash)
+	finalized, err = IsFinalized(caller, event.ReqHash)
 	if err != nil {
 		goto ERROR
 	}
@@ -119,7 +119,7 @@ func isAssigned(signer utils.ISign, assignee common.Address) bool {
 	return true
 }
 
-func isFinalized(caller *contract.RoninVRFCoordinatorCaller, req [32]byte) (bool, error) {
+func IsFinalized(caller *contract.RoninVRFCoordinatorCaller, req [32]byte) (bool, error) {
 	result, err := caller.RequestFinalized(nil, req)
 	if err != nil {
 		return false, err