add check for api call failure

internal/handlers/ussd/menuhandler.go

@@ -829,6 +829,7 @@ func (h *Handlers) ValidateAmount(ctx context.Context, sym string, input []byte)
 	}
 
 	flag_invalid_amount, _ := h.flagManager.GetFlag("flag_invalid_amount")
+	flag_api_error, _ := h.flagManager.GetFlag("flag_api_call_error")
 
 	store := h.userdataStore
 	publicKey, _ := store.ReadEntry(ctx, sessionId, utils.DATA_PUBLIC_KEY)
@@ -838,10 +839,15 @@ func (h *Handlers) ValidateAmount(ctx context.Context, sym string, input []byte)
 	balanceRes, err := h.accountService.CheckBalance(string(publicKey))
 	balanceStr := balanceRes.Result.Balance
 
+	if !balanceRes.Ok {
+		res.FlagSet = append(res.FlagSet, flag_api_error)
+		return res, nil
+	}
 	if err != nil {
 		return res, err
 	}
 	res.Content = balanceStr
+	res.FlagReset = append(res.FlagReset, flag_api_error)
 
 	// Parse the balance
 	balanceParts := strings.Split(balanceStr, " ")

internal/handlers/ussd/menuhandler_test.go

@@ -1468,6 +1468,7 @@ func TestValidateAmount(t *testing.T) {
 		t.Logf(err.Error())
 	}
 	flag_invalid_amount, _ := fm.parser.GetFlag("flag_invalid_amount")
+	flag_api_error, _ := fm.GetFlag("flag_api_call_error")
 	mockDataStore := new(mocks.MockUserDataStore)
 	mockCreateAccountService := new(mocks.MockAccountService)
 
@@ -1503,6 +1504,7 @@ func TestValidateAmount(t *testing.T) {
 			publicKey: []byte("0xrqeqrequuq"),
 			expectedResult: resource.Result{
 				Content:   "0.001",
+				FlagReset: []uint32{flag_api_error},
 			},
 		},
 		{
@@ -1521,6 +1523,7 @@ func TestValidateAmount(t *testing.T) {
 			publicKey: []byte("0xrqeqrequuq"),
 			expectedResult: resource.Result{
 				FlagSet:   []uint32{flag_invalid_amount},
+				FlagReset: []uint32{flag_api_error},
 				Content:   "0.02",
 			},
 		},
@@ -1540,6 +1543,7 @@ func TestValidateAmount(t *testing.T) {
 			publicKey: []byte("0xrqeqrequuq"),
 			expectedResult: resource.Result{
 				FlagSet:   []uint32{flag_invalid_amount},
+				FlagReset: []uint32{flag_api_error},
 				Content:   "0.02ms",
 			},
 		},

services/registration/amount.vis

@@ -5,6 +5,7 @@ MOUT back 0
 HALT
 LOAD validate_amount 64
 RELOAD validate_amount
+CATCH api_failure  flag_api_call_error  1
 CATCH invalid_amount flag_invalid_amount 1
 INCMP _ 0
 LOAD get_recipient 12