internal/handlers/handlerservice.go

@@ -92,6 +92,7 @@ func (ls *LocalHandlerService) GetHandler() (*ussd.Handlers, error) {
 	ls.DbRs.AddLocalFunc("verify_new_pin", ussdHandlers.VerifyNewPin)
 	ls.DbRs.AddLocalFunc("confirm_pin_change", ussdHandlers.ConfirmPinChange)
 	ls.DbRs.AddLocalFunc("quit_with_help", ussdHandlers.QuitWithHelp)
+	ls.DbRs.AddLocalFunc("check_vouchers", ussdHandlers.CheckVouchers)
 	ls.DbRs.AddLocalFunc("get_vouchers", ussdHandlers.GetVoucherList)
 
 	return ussdHandlers, nil

internal/handlers/server/accountservice.go

@@ -13,14 +13,12 @@ type AccountServiceInterface interface {
 	CheckBalance(publicKey string) (string, error)
 	CreateAccount() (*models.AccountResponse, error)
 	CheckAccountStatus(trackingId string) (string, error)
-	FetchVouchersFromAPI() ([]models.VoucherHolding, error)
+	FetchVouchers(publicKey string) (*models.VoucherHoldingResponse, error)
 }
 
 type AccountService struct {
 }
 
-
-
 // CheckAccountStatus retrieves the status of an account transaction based on the provided tracking ID.
 //
 // Parameters:
@@ -28,12 +26,10 @@ type AccountService struct {
 //     CreateAccount or a similar function that returns an AccountResponse. The `trackingId` field in the
 //     AccountResponse struct can be used here to check the account status during a transaction.
 //
-//
 // Returns:
 //   - string: The status of the transaction as a string. If there is an error during the request or processing, this will be an empty string.
 //   - error: An error if any occurred during the HTTP request, reading the response, or unmarshalling the JSON data.
 //     If no error occurs, this will be nil.
-//
 func (as *AccountService) CheckAccountStatus(trackingId string) (string, error) {
 	resp, err := http.Get(config.TrackStatusURL + trackingId)
 	if err != nil {
@@ -57,7 +53,6 @@ func (as *AccountService) CheckAccountStatus(trackingId string) (string, error)
 	return status, nil
 }
 
-
 // CheckBalance retrieves the balance for a given public key from the custodial balance API endpoint.
 // Parameters:
 //   - publicKey: The public key associated with the account whose balance needs to be checked.
@@ -84,8 +79,7 @@ func (as *AccountService) CheckBalance(publicKey string) (string, error) {
 	return balance, nil
 }
 
-
-//CreateAccount creates a new account in the custodial system.
+// CreateAccount creates a new account in the custodial system.
 // Returns:
 //   - *models.AccountResponse: A pointer to an AccountResponse struct containing the details of the created account.
 //     If there is an error during the request or processing, this will be nil.
@@ -112,30 +106,86 @@ func (as *AccountService) CreateAccount() (*models.AccountResponse, error) {
 	return &accountResp, nil
 }
 
-// fetchVouchersFromAPI calls the API to get the list of vouchers belonging to the user
-func  (as *AccountService) FetchVouchersFromAPI() ([]models.VoucherHolding, error) {
+// FetchVouchers retrieves the token holdings for a given public key from the custodial holdings API endpoint
+// Parameters:
+//   - publicKey: The public key associated with the account.
+func (as *AccountService) FetchVouchers(publicKey string) (*models.VoucherHoldingResponse, error) {
 	// TODO replace with the actual request once ready
-	mockJSON := `[
-		{
-			"symbol": "MUMO",
-			"address": "0x078b3a26596218507781722A4e8825BFB9570Fba"
-		},
-		{
-			"symbol": "SRF",
-			"address": "0x45d747172e77d55575c197CbA9451bC2CD8F4958"
-		},
-		{
-			"symbol": "HALGAN",
-			"address": "0x12169Fb5931A599ad1283bb8311Dad54Feb51A28"
+	mockJSON := `{
+	"ok": true,
+	"description": "Token holdings with current balances",
+		"result": {
+			"holdings": [
+				{
+					"contractAddress": "0x6CC75A06ac72eB4Db2eE22F781F5D100d8ec03ee",
+					"tokenSymbol": "FSPTST",
+					"tokenDecimals": "6",
+					"balance": "8869964242"
+				},
+				{
+					"contractAddress": "0x724F2910D790B54A39a7638282a45B1D83564fFA",
+					"tokenSymbol": "GEO",
+					"tokenDecimals": "6",
+					"balance": "9884"
+				},
+				{
+					"contractAddress": "0x2105a206B7bec31E2F90acF7385cc8F7F5f9D273",
+					"tokenSymbol": "MFNK",
+					"tokenDecimals": "6",
+					"balance": "19788697"
+				},
+				{
+					"contractAddress": "0x63DE2Ac8D1008351Cc69Fb8aCb94Ba47728a7E83",
+					"tokenSymbol": "MILO",
+					"tokenDecimals": "6",
+					"balance": "75"
+				},
+				{
+					"contractAddress": "0xd4c288865Ce0985a481Eef3be02443dF5E2e4Ea9",
+					"tokenSymbol": "SOHAIL",
+					"tokenDecimals": "6",
+					"balance": "27874115"
+				},
+				{
+					"contractAddress": "0x45d747172e77d55575c197CbA9451bC2CD8F4958",
+					"tokenSymbol": "SRQIF",
+					"tokenDecimals": "6",
+					"balance": "2745987"
+				},
+				{
+					"contractAddress": "0x45d747172e77d55575c197CbA9451bC2CD8F4958",
+					"tokenSymbol": "SRFI",
+					"tokenDecimals": "6",
+					"balance": "2745987"
+				},
+				{
+					"contractAddress": "0x45d747172e77d55575c197CbA9451bC2CD8F4958",
+					"tokenSymbol": "SRFU",
+					"tokenDecimals": "6",
+					"balance": "2745987"
+				},
+				{
+					"contractAddress": "0x45d747172e77d55575c197CbA9451bC2CD8F4958",
+					"tokenSymbol": "SRQF",
+					"tokenDecimals": "6",
+					"balance": "2745987"
+				},
+				{
+					"contractAddress": "0x45d747172e77d55575c197CbA9451bC2CD8F4958",
+					"tokenSymbol": "SREF",
+					"tokenDecimals": "6",
+					"balance": "2745987"
+				}
+			]
 		}
-	]`
+	}`
 
 	// Unmarshal the JSON response
-	var holdings []models.VoucherHolding
+	var holdings models.VoucherHoldingResponse
 	err := json.Unmarshal([]byte(mockJSON), &holdings)
 	if err != nil {
 		return nil, err
 	}
 
-	return holdings, nil
+	return &holdings, nil
 }

internal/handlers/ussd/menuhandler.go

@@ -3,6 +3,7 @@ package ussd
 import (
 	"bytes"
 	"context"
+	"encoding/json"
 	"fmt"
 	"path"
 	"regexp"
@@ -232,22 +233,36 @@ func (h *Handlers) SaveTemporaryPin(ctx context.Context, sym string, input []byt
 }
 
 // GetVoucherList fetches the list of vouchers and formats them
-// checks whether they are synced internally before calling the API
+// checks whether they are stored internally before calling the API
 func (h *Handlers) GetVoucherList(ctx context.Context, sym string, input []byte) (resource.Result, error) {
 	var res resource.Result
+	sessionId, ok := ctx.Value("SessionId").(string)
+	if !ok {
+		return res, fmt.Errorf("missing session")
+	}
 
 	// check if the vouchers exist internally and if not
 	// fetch from the API
 
-	// Fetch vouchers from API
-	vouchers, err := h.accountService.FetchVouchersFromAPI()
+	// Read vouchers from the store
+	store := h.userdataStore
+	voucherData, err := store.ReadEntry(ctx, sessionId, utils.DATA_VOUCHER_LIST)
 	if err != nil {
-		return res, fmt.Errorf("error fetching vouchers: %w", err)
+		return res, err
+	}
+
+	// Unmarshal the stored JSON data into the correct struct
+	var vouchers []struct {
+		TokenSymbol string `json:"tokenSymbol"`
+	}
+	err = json.Unmarshal(voucherData, &vouchers)
+	if err != nil {
+		return res, fmt.Errorf("failed to unmarshal vouchers: %v", err)
 	}
 
 	var numberedVouchers []string
 	for i, voucher := range vouchers {
-		numberedVouchers = append(numberedVouchers, fmt.Sprintf("%d:%s", i+1, voucher.Symbol))
+		numberedVouchers = append(numberedVouchers, fmt.Sprintf("%d:%s", i+1, voucher.TokenSymbol))
 	}
 	res.Content = strings.Join(numberedVouchers, "\n")
 
@@ -1007,3 +1022,41 @@ func (h *Handlers) GetProfileInfo(ctx context.Context, sym string, input []byte)
 
 	return res, nil
 }
+
+// CheckVouchers retrieves the token holdings from the API using the "PublicKey" and stores
+// them to gdbm
+func (h *Handlers) CheckVouchers(ctx context.Context, sym string, input []byte) (resource.Result, error) {
+	var res resource.Result
+	var err error
+
+	sessionId, ok := ctx.Value("SessionId").(string)
+	if !ok {
+		return res, fmt.Errorf("missing session")
+	}
+
+	store := h.userdataStore
+	publicKey, err := store.ReadEntry(ctx, sessionId, utils.DATA_PUBLIC_KEY)
+	if err != nil {
+		return res, nil
+	}
+
+	// Fetch vouchers from the API
+	vouchersResp, err := h.accountService.FetchVouchers(string(publicKey))
+	if err != nil {
+		return res, nil
+	}
+
+	// Convert only the list of holdings (vouchers) to JSON
+	voucherBytes, err := json.Marshal(vouchersResp.Result.Holdings)
+	if err != nil {
+		return res, nil
+	}
+
+	// Store the voucher symbols in the userdataStore
+	err = store.WriteEntry(ctx, sessionId, utils.DATA_VOUCHER_LIST, voucherBytes)
+	if err != nil {
+		return res, nil
+	}
+
+	return res, nil
+}

internal/mocks/servicemock.go

@@ -25,7 +25,7 @@ func (m *MockAccountService) CheckAccountStatus(trackingId string) (string, erro
 	return args.String(0), args.Error(1)
 }
 
-func (m *MockAccountService) FetchVouchersFromAPI() ([]models.VoucherHolding, error) {
+func (m *MockAccountService) FetchVouchers(publicKey string) (*models.VoucherHoldingResponse, error) {
 	args := m.Called()
-	return args.Get(0).([]models.VoucherHolding), args.Error(1)
+	return args.Get(0).(*models.VoucherHoldingResponse), args.Error(1)
 }

internal/models/vouchersresponse.go

@@ -1,7 +1,15 @@
 package models
 
-// VoucherHolding represents a single voucher holding
-type VoucherHolding struct {
-	Symbol  string `json:"symbol"`
-	Address string `json:"address"`
-}
+// VoucherHoldingResponse represents a single voucher holding
+type VoucherHoldingResponse struct {
+	Ok          bool   `json:"ok"`
+	Description string `json:"description"`
+	Result      struct {
+		Holdings []struct {
+			ContractAddress string `json:"contractAddress"`
+			TokenSymbol     string `json:"tokenSymbol"`
+			TokenDecimals   string `json:"tokenDecimals"`
+			Balance         string `json:"balance"`
+		} `json:"holdings"`
+	} `json:"result"`
+}

internal/utils/db.go

@@ -23,6 +23,7 @@ const (
 	DATA_RECIPIENT
 	DATA_AMOUNT
 	DATA_TEMPORARY_PIN
+	DATA_VOUCHER_LIST
 )
 
 func typToBytes(typ DataTyp) []byte {

services/registration/main.vis

@@ -1,5 +1,7 @@
 LOAD check_balance 64
 RELOAD check_balance
+LOAD check_vouchers 10
+RELOAD check_vouchers
 MAP check_balance
 MOUT send 1
 MOUT vouchers 2