adding PR feedback

Author: pablolagreca

core/services/relay/evm/evm_service.go

@@ -171,7 +171,7 @@ func (r *Relayer) SubmitTransaction(ctx context.Context, txRequest evmtypes.Subm
 
 	_, err = r.chain.TxManager().CreateTransaction(ctx, txmReq)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("%w; failed to create tx", err)
 	}
 
 
@@ -194,14 +194,10 @@ func (r *Relayer) SubmitTransaction(ctx context.Context, txRequest evmtypes.Subm
 		if time.Since(start) > maximumWaitTimeForConfirmation {
 			return nil, errors.Errorf("Wait time for Tx %s to get confirmed was greater than maximum wait time %d", txID, maximumWaitTimeForConfirmation)
 		}
-		//PLEX-1524 - Use ticker instead of time.Sleep
+		//PLEX-1524 - Use ticker instead of time.Sleep and make the time configurable
 		time.Sleep(100 * time.Millisecond)
 	}
 
-	if err != nil {
-		return nil, fmt.Errorf("%w; failed to create tx", err)
-	}
-
 	receipt, err := r.chain.TxManager().GetTransactionReceipt(ctx, txID)
 	if err != nil {
 		return nil, fmt.Errorf("%w; failed to get TX receipt for tx with ID %s", err, txID)