Ensure that the user sets a PIN before proceeding to main

internal/handlers/ussd/menuhandler.go

@@ -61,6 +61,13 @@ func (h *Handlers) CreateAccount(ctx context.Context, sym string, input []byte)
 		return res, err
 	}
 
+	// if an account exists, set the flag and return
+	existingAccountData, err := h.accountFileHandler.ReadAccountData()
+	if existingAccountData != nil {
+		res.FlagSet = append(res.FlagSet, models.USERFLAG_ACCOUNT_CREATED)
+		return res, err
+	}
+
 	accountResp, err := server.CreateAccount()
 	if err != nil {
 		res.FlagSet = append(res.FlagSet, models.USERFLAG_ACCOUNT_CREATION_FAILED)
@@ -119,6 +126,7 @@ func (h *Handlers) VerifyPin(ctx context.Context, sym string, input []byte) (res
 	if bytes.Equal(input, []byte(accountData["AccountPIN"])) {
 		res.FlagSet = []uint32{models.USERFLAG_VALIDPIN}
 		res.FlagReset = []uint32{models.USERFLAG_PINMISMATCH}
+		res.FlagSet = append(res.FlagSet, models.USERFLAG_PIN_SET)
 	} else {
 		res.FlagSet = []uint32{models.USERFLAG_PINMISMATCH}
 	}

internal/models/flags.go

@@ -13,7 +13,7 @@ const (
 	USERFLAG_INCORRECTPIN
 	USERFLAG_UNLOCKFORUPDATE
 	USERFLAG_INVALID_AMOUNT
-	USERFLAG_QUERYPIN
+	USERFLAG_PIN_SET
 	USERFLAG_VALIDPIN
 	USERFLAG_PINMISMATCH
 	USERFLAG_INCORRECTDATEFORMAT