573 lines
19 KiB
Go
573 lines
19 KiB
Go
package application
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import (
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"context"
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"fmt"
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"strconv"
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"git.defalsify.org/vise.git/resource"
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"git.grassecon.net/grassrootseconomics/common/hex"
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"git.grassecon.net/grassrootseconomics/common/phone"
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"git.grassecon.net/grassrootseconomics/sarafu-vise/config"
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"git.grassecon.net/grassrootseconomics/sarafu-vise/store"
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storedb "git.grassecon.net/grassrootseconomics/sarafu-vise/store/db"
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dataserviceapi "github.com/grassrootseconomics/ussd-data-service/pkg/api"
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"gopkg.in/leonelquinteros/gotext.v1"
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)
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// GetMpesaMaxLimit returns the max FROM token
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// check if max/tokenDecimals > 0.1 for UX purposes and to prevent swapping of dust values
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func (h *MenuHandlers) GetMpesaMaxLimit(ctx context.Context, sym string, input []byte) (resource.Result, error) {
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var res resource.Result
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sessionId, ok := ctx.Value("SessionId").(string)
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if !ok {
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return res, fmt.Errorf("missing session")
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}
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flag_api_call_error, _ := h.flagManager.GetFlag("flag_api_call_error")
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flag_low_swap_amount, _ := h.flagManager.GetFlag("flag_low_swap_amount")
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flag_incorrect_pool, _ := h.flagManager.GetFlag("flag_incorrect_pool")
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code := codeFromCtx(ctx)
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l := gotext.NewLocale(translationDir, code)
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l.AddDomain("default")
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inputStr := string(input)
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if inputStr == "0" || inputStr == "9" {
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return res, nil
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}
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userStore := h.userdataStore
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// Fetch session data
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_, activeBal, _, activeAddress, publicKey, activeDecimal, err := h.getSessionData(ctx, sessionId)
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if err != nil {
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return res, err
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}
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rate := config.MpesaRate()
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txType := "swap"
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mpesaAddress := config.DefaultMpesaAddress()
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// Normalize the mpesa address to fetch the phone number
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publicKeyNormalized, err := hex.NormalizeHex(mpesaAddress)
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if err != nil {
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logg.ErrorCtxf(ctx, "Failed to normalize alias address", "address", mpesaAddress, "error", err)
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return res, err
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}
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// get the recipient's phone number from the address
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recipientPhoneNumber, err := userStore.ReadEntry(ctx, publicKeyNormalized, storedb.DATA_PUBLIC_KEY_REVERSE)
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if err != nil || len(recipientPhoneNumber) == 0 {
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logg.WarnCtxf(ctx, "Alias address not registered, switching to normal transaction", "address", mpesaAddress)
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recipientPhoneNumber = nil
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}
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// store it for future reference (TODO)
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if err := userStore.WriteEntry(ctx, sessionId, storedb.DATA_RECIPIENT_PHONE_NUMBER, recipientPhoneNumber); err != nil {
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logg.ErrorCtxf(ctx, "Failed to write recipient phone number", "value", string(recipientPhoneNumber), "error", err)
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return res, err
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}
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// fetch data for verification
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recipientActiveSym, recipientActiveAddress, recipientActiveDecimal, err := h.getRecipientData(ctx, string(recipientPhoneNumber))
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if err != nil {
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return res, err
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}
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// If RAT is the same as SAT, return early with KSH format
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if string(activeAddress) == string(recipientActiveAddress) {
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txType = "normal"
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// Save the transaction type
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if err := userStore.WriteEntry(ctx, sessionId, storedb.DATA_SEND_TRANSACTION_TYPE, []byte(txType)); err != nil {
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logg.ErrorCtxf(ctx, "Failed to write transaction type", "type", txType, "error", err)
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return res, err
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}
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activeFloat, _ := strconv.ParseFloat(string(activeBal), 64)
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ksh := fmt.Sprintf("%f", activeFloat*rate)
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kshFormatted, _ := store.TruncateDecimalString(ksh, 0)
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res.Content = l.Get(
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"Enter the amount of Mpesa to get: (Max %s Ksh)\n",
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kshFormatted,
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)
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return res, nil
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}
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// Resolve active pool address
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activePoolAddress, err := h.resolveActivePoolAddress(ctx, sessionId)
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if err != nil {
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return res, err
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}
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// Check if sender token is swappable
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canSwap, err := h.accountService.CheckTokenInPool(ctx, string(activePoolAddress), string(activeAddress))
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if err != nil {
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res.FlagSet = append(res.FlagSet, flag_api_call_error)
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logg.ErrorCtxf(ctx, "failed on CheckTokenInPool", "error", err)
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return res, nil
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}
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if !canSwap.CanSwapFrom { // pool issue (TODO on vis)
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res.FlagSet = append(res.FlagSet, flag_incorrect_pool)
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return res, nil
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}
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// retrieve the max credit send amounts
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_, maxRAT, err := h.calculateSendCreditLimits(ctx, activePoolAddress, activeAddress, recipientActiveAddress, publicKey, activeDecimal, recipientActiveDecimal)
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if err != nil {
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res.FlagSet = append(res.FlagSet, flag_api_call_error)
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logg.ErrorCtxf(ctx, "failed on calculateSendCreditLimits", "error", err)
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return res, nil
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}
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// Fallback if below minimum
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maxFloat, _ := strconv.ParseFloat(maxRAT, 64)
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if maxFloat < 0.1 {
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formatted, _ := store.TruncateDecimalString(maxRAT, 2)
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res.Content = formatted
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res.FlagSet = append(res.FlagSet, flag_low_swap_amount)
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return res, nil
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}
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// Save max RAT amount to be used in validating the user's input
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err = userStore.WriteEntry(ctx, sessionId, storedb.DATA_ACTIVE_SWAP_MAX_AMOUNT, []byte(maxRAT))
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if err != nil {
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logg.ErrorCtxf(ctx, "failed to write swap max amount (maxRAT)", "value", maxRAT, "error", err)
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return res, err
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}
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// Save the transaction type
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if err := userStore.WriteEntry(ctx, sessionId, storedb.DATA_SEND_TRANSACTION_TYPE, []byte(txType)); err != nil {
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logg.ErrorCtxf(ctx, "Failed to write transaction type", "type", txType, "error", err)
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return res, err
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}
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// save swap related data for the swap preview
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metadata := &dataserviceapi.TokenHoldings{
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TokenAddress: string(recipientActiveAddress),
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TokenSymbol: string(recipientActiveSym),
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TokenDecimals: string(recipientActiveDecimal),
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}
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// Store the active swap_to data
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if err := store.UpdateSwapToVoucherData(ctx, userStore, sessionId, metadata); err != nil {
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logg.ErrorCtxf(ctx, "failed on UpdateSwapToVoucherData", "error", err)
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return res, err
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}
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maxKsh := maxFloat * rate
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kshStr := fmt.Sprintf("%f", maxKsh)
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kshFormatted, _ := store.TruncateDecimalString(kshStr, 0)
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res.Content = l.Get(
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"Enter the amount of Mpesa to get: (Max %s Ksh)\n",
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kshFormatted,
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)
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return res, nil
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}
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// GetMpesaPreview displays the get mpesa preview and estimates
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func (h *MenuHandlers) GetMpesaPreview(ctx context.Context, sym string, input []byte) (resource.Result, error) {
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var res resource.Result
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sessionId, ok := ctx.Value("SessionId").(string)
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if !ok {
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return res, fmt.Errorf("missing session")
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}
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// INPUT IN RAT Ksh
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inputStr := string(input)
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if inputStr == "9" {
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return res, nil
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}
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flag_invalid_amount, _ := h.flagManager.GetFlag("flag_invalid_amount")
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flag_api_call_error, _ := h.flagManager.GetFlag("flag_api_call_error")
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code := codeFromCtx(ctx)
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l := gotext.NewLocale(translationDir, code)
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l.AddDomain("default")
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userStore := h.userdataStore
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rate := config.MpesaRate()
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// Input in Ksh
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kshAmount, err := strconv.ParseFloat(inputStr, 64)
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if err != nil {
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res.FlagSet = append(res.FlagSet, flag_invalid_amount)
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res.Content = inputStr
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return res, nil
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}
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// divide by the rate
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inputAmount := kshAmount / rate
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// store the user's raw input amount in the temporary value
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err = userStore.WriteEntry(ctx, sessionId, storedb.DATA_TEMPORARY_VALUE, []byte(inputStr))
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if err != nil {
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logg.ErrorCtxf(ctx, "failed to write temporary inputStr entry with", "key", storedb.DATA_TEMPORARY_VALUE, "value", inputStr, "error", err)
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return res, err
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}
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swapData, err := store.ReadSwapPreviewData(ctx, userStore, sessionId)
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if err != nil {
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return res, err
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}
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transactionType, err := userStore.ReadEntry(ctx, sessionId, storedb.DATA_SEND_TRANSACTION_TYPE)
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if err != nil {
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return res, err
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}
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if string(transactionType) == "normal" {
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activeBal, err := userStore.ReadEntry(ctx, sessionId, storedb.DATA_ACTIVE_BAL)
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if err != nil {
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logg.ErrorCtxf(ctx, "failed to read activeBal entry with", "key", storedb.DATA_ACTIVE_BAL, "error", err)
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return res, err
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}
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balanceValue, err := strconv.ParseFloat(string(activeBal), 64)
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if err != nil {
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logg.ErrorCtxf(ctx, "Failed to convert the activeBal to a float", "error", err)
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return res, err
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}
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if inputAmount > balanceValue {
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res.FlagSet = append(res.FlagSet, flag_invalid_amount)
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res.Content = inputStr
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return res, nil
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}
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// Format the input amount to 2 decimal places
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inputAmountStr := fmt.Sprintf("%f", inputAmount)
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qouteInputAmount, _ := store.TruncateDecimalString(inputAmountStr, 2)
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// store the inputAmountStr as the final amount (that will be sent)
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err = userStore.WriteEntry(ctx, sessionId, storedb.DATA_AMOUNT, []byte(inputAmountStr))
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if err != nil {
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logg.ErrorCtxf(ctx, "failed to write send amount value entry with", "key", storedb.DATA_AMOUNT, "value", inputAmountStr, "error", err)
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return res, err
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}
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res.Content = l.Get(
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"You are sending %s %s in order to receive %s ksh",
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qouteInputAmount, swapData.ActiveSwapFromSym, inputStr,
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)
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return res, nil
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}
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// use the stored max RAT
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maxRATValue, err := strconv.ParseFloat(swapData.ActiveSwapMaxAmount, 64)
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if err != nil {
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logg.ErrorCtxf(ctx, "Failed to convert the swapMaxAmount to a float", "error", err)
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return res, err
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}
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if inputAmount > maxRATValue {
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res.FlagSet = append(res.FlagSet, flag_invalid_amount)
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res.Content = inputStr
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return res, nil
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}
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formattedAmount := fmt.Sprintf("%f", inputAmount)
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finalAmountStr, err := store.ParseAndScaleAmount(formattedAmount, swapData.ActiveSwapToDecimal)
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if err != nil {
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return res, err
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}
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// call the credit send API to get the reverse quote
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r, err := h.accountService.GetCreditSendReverseQuote(ctx, swapData.ActivePoolAddress, swapData.ActiveSwapFromAddress, swapData.ActiveSwapToAddress, finalAmountStr)
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if err != nil {
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res.FlagSet = append(res.FlagSet, flag_api_call_error)
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res.Content = l.Get("Your request failed. Please try again later.")
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logg.ErrorCtxf(ctx, "failed GetCreditSendReverseQuote poolSwap", "error", err)
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return res, nil
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}
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sendInputAmount := r.InputAmount // amount of SAT
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sendOutputAmount := r.OutputAmount // amount of RAT
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// store the sendOutputAmount as the final amount (that will be sent)
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err = userStore.WriteEntry(ctx, sessionId, storedb.DATA_AMOUNT, []byte(sendOutputAmount))
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if err != nil {
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logg.ErrorCtxf(ctx, "failed to write output amount value entry with", "key", storedb.DATA_AMOUNT, "value", sendOutputAmount, "error", err)
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return res, err
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}
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// store the sendInputAmount as the swap amount
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err = userStore.WriteEntry(ctx, sessionId, storedb.DATA_ACTIVE_SWAP_AMOUNT, []byte(sendInputAmount))
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if err != nil {
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logg.ErrorCtxf(ctx, "failed to write swap amount entry with", "key", storedb.DATA_ACTIVE_SWAP_AMOUNT, "value", sendInputAmount, "error", err)
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return res, err
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}
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// covert for display
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quoteInputStr := store.ScaleDownBalance(sendInputAmount, swapData.ActiveSwapFromDecimal)
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// Format the quoteInputStr amount to 2 decimal places
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qouteInputAmount, _ := store.TruncateDecimalString(quoteInputStr, 2)
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res.Content = l.Get(
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"You are sending %s %s in order to receive %s ksh",
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qouteInputAmount, swapData.ActiveSwapFromSym, inputStr,
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)
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return res, nil
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}
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// InitiateGetMpesa calls the poolSwap, followed by the transfer and returns a confirmation based on the result.
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func (h *MenuHandlers) InitiateGetMpesa(ctx context.Context, sym string, input []byte) (resource.Result, error) {
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var res resource.Result
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var err error
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sessionId, ok := ctx.Value("SessionId").(string)
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if !ok {
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return res, fmt.Errorf("missing session")
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}
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flag_account_authorized, _ := h.flagManager.GetFlag("flag_account_authorized")
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flag_api_call_error, _ := h.flagManager.GetFlag("flag_api_call_error")
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code := codeFromCtx(ctx)
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l := gotext.NewLocale(translationDir, code)
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l.AddDomain("default")
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userStore := h.userdataStore
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mpesaAddress := config.DefaultMpesaAddress()
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swapData, err := store.ReadSwapPreviewData(ctx, userStore, sessionId)
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if err != nil {
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return res, err
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}
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transactionType, err := userStore.ReadEntry(ctx, sessionId, storedb.DATA_SEND_TRANSACTION_TYPE)
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if err != nil {
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return res, err
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}
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if string(transactionType) == "normal" {
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// Call TokenTransfer for the normal transaction
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data, err := store.ReadTransactionData(ctx, h.userdataStore, sessionId)
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if err != nil {
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return res, err
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}
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finalAmountStr, err := store.ParseAndScaleAmount(data.Amount, data.ActiveDecimal)
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if err != nil {
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return res, err
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}
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tokenTransfer, err := h.accountService.TokenTransfer(ctx, finalAmountStr, data.PublicKey, mpesaAddress, data.ActiveAddress)
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if err != nil {
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res.FlagSet = append(res.FlagSet, flag_api_call_error)
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res.Content = l.Get("Your request failed. Please try again later.")
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logg.ErrorCtxf(ctx, "failed on TokenTransfer", "error", err)
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return res, nil
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}
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logg.InfoCtxf(ctx, "TokenTransfer normal", "trackingId", tokenTransfer.TrackingId)
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res.Content = l.Get("Your request has been sent. You will receive %s ksh", data.TemporaryValue)
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res.FlagReset = append(res.FlagReset, flag_account_authorized)
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return res, nil
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}
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swapAmount, err := userStore.ReadEntry(ctx, sessionId, storedb.DATA_ACTIVE_SWAP_AMOUNT)
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if err != nil {
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logg.ErrorCtxf(ctx, "failed to read swapAmount entry with", "key", storedb.DATA_ACTIVE_SWAP_AMOUNT, "error", err)
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return res, err
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}
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swapAmountStr := string(swapAmount)
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// Call the poolSwap API
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poolSwap, err := h.accountService.PoolSwap(ctx, swapAmountStr, swapData.PublicKey, swapData.ActiveSwapFromAddress, swapData.ActivePoolAddress, swapData.ActiveSwapToAddress)
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if err != nil {
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flag_api_call_error, _ := h.flagManager.GetFlag("flag_api_call_error")
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res.FlagSet = append(res.FlagSet, flag_api_call_error)
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res.Content = l.Get("Your request failed. Please try again later.")
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logg.ErrorCtxf(ctx, "failed on poolSwap", "error", err)
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return res, nil
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}
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logg.InfoCtxf(ctx, "poolSwap", "swapTrackingId", poolSwap.TrackingId)
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finalKshStr, err := userStore.ReadEntry(ctx, sessionId, storedb.DATA_TEMPORARY_VALUE)
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if err != nil {
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return res, err
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}
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amount, err := userStore.ReadEntry(ctx, sessionId, storedb.DATA_AMOUNT)
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if err != nil {
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return res, err
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}
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// Initiate a send to mpesa after the swap
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tokenTransfer, err := h.accountService.TokenTransfer(ctx, string(amount), swapData.PublicKey, mpesaAddress, swapData.ActiveSwapToAddress)
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if err != nil {
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res.FlagSet = append(res.FlagSet, flag_api_call_error)
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res.Content = l.Get("Your request failed. Please try again later.")
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logg.ErrorCtxf(ctx, "failed on TokenTransfer after swap", "error", err)
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return res, nil
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}
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logg.InfoCtxf(ctx, "final TokenTransfer after swap", "trackingId", tokenTransfer.TrackingId)
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res.Content = l.Get("Your request has been sent. You will receive %s ksh", finalKshStr)
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res.FlagReset = append(res.FlagReset, flag_account_authorized)
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return res, nil
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}
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// SendMpesaMinLimit returns the min amount from the config
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func (h *MenuHandlers) SendMpesaMinLimit(ctx context.Context, sym string, input []byte) (resource.Result, error) {
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var res resource.Result
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code := codeFromCtx(ctx)
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l := gotext.NewLocale(translationDir, code)
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l.AddDomain("default")
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inputStr := string(input)
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if inputStr == "0" || inputStr == "9" {
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return res, nil
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}
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// Fetch min amount from config/env
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min := config.MinMpesaSendAmount()
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// Convert to string
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ksh := fmt.Sprintf("%f", min)
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// Format (e.g., 100.0 -> 100)
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kshFormatted, _ := store.TruncateDecimalString(ksh, 0)
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res.Content = l.Get(
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"Enter the amount of Mpesa to send: (Minimum %s Ksh)\n",
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kshFormatted,
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)
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return res, nil
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}
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// SendMpesaPreview displays the send mpesa preview and estimates
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func (h *MenuHandlers) SendMpesaPreview(ctx context.Context, sym string, input []byte) (resource.Result, error) {
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var res resource.Result
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sessionId, ok := ctx.Value("SessionId").(string)
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if !ok {
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return res, fmt.Errorf("missing session")
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}
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// INPUT IN Ksh
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inputStr := string(input)
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if inputStr == "0" || inputStr == "9" {
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return res, nil
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}
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flag_invalid_amount, _ := h.flagManager.GetFlag("flag_invalid_amount")
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code := codeFromCtx(ctx)
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|
l := gotext.NewLocale(translationDir, code)
|
|
l.AddDomain("default")
|
|
|
|
userStore := h.userdataStore
|
|
sendRate := config.MpesaSendRate()
|
|
|
|
// Input in Ksh
|
|
kshAmount, err := strconv.ParseFloat(inputStr, 64)
|
|
if err != nil {
|
|
res.FlagSet = append(res.FlagSet, flag_invalid_amount)
|
|
res.Content = inputStr
|
|
return res, nil
|
|
}
|
|
|
|
min := config.MinMpesaSendAmount()
|
|
max := config.MaxMpesaSendAmount()
|
|
|
|
if kshAmount > max || kshAmount < min {
|
|
res.FlagSet = append(res.FlagSet, flag_invalid_amount)
|
|
res.Content = inputStr
|
|
return res, nil
|
|
}
|
|
|
|
res.FlagReset = append(res.FlagReset, flag_invalid_amount)
|
|
|
|
// store the user's raw input amount
|
|
err = userStore.WriteEntry(ctx, sessionId, storedb.DATA_AMOUNT, []byte(inputStr))
|
|
if err != nil {
|
|
logg.ErrorCtxf(ctx, "failed to write amount inputStr entry with", "key", storedb.DATA_AMOUNT, "value", inputStr, "error", err)
|
|
return res, err
|
|
}
|
|
|
|
estimateValue := kshAmount / sendRate
|
|
estimateStr := fmt.Sprintf("%f", estimateValue)
|
|
estimateFormatted, _ := store.TruncateDecimalString(estimateStr, 0)
|
|
|
|
res.Content = l.Get(
|
|
"You will get a prompt for your M-Pesa PIN shortly to send %s ksh and receive %s cUSD",
|
|
inputStr, estimateFormatted,
|
|
)
|
|
|
|
return res, nil
|
|
}
|
|
|
|
// InitiateSendMpesa calls the trigger-onram API to initiate the purchase
|
|
func (h *MenuHandlers) InitiateSendMpesa(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")
|
|
}
|
|
|
|
flag_account_authorized, _ := h.flagManager.GetFlag("flag_account_authorized")
|
|
flag_api_call_error, _ := h.flagManager.GetFlag("flag_api_call_error")
|
|
|
|
code := codeFromCtx(ctx)
|
|
l := gotext.NewLocale(translationDir, code)
|
|
l.AddDomain("default")
|
|
|
|
userStore := h.userdataStore
|
|
|
|
publicKey, err := userStore.ReadEntry(ctx, sessionId, storedb.DATA_PUBLIC_KEY)
|
|
if err != nil {
|
|
logg.ErrorCtxf(ctx, "failed to read publicKey entry", "key", storedb.DATA_PUBLIC_KEY, "error", err)
|
|
return res, err
|
|
}
|
|
|
|
phoneNumber, err := phone.FormatToLocalPhoneNumber(sessionId)
|
|
if err != nil {
|
|
logg.ErrorCtxf(ctx, "failed on FormatToLocalPhoneNumber", "session-id", sessionId, "error", err)
|
|
res.FlagSet = append(res.FlagSet, flag_api_call_error)
|
|
res.Content = l.Get("Your request failed. Please try again later.")
|
|
return res, nil
|
|
}
|
|
|
|
defaultAsset := config.DefaultMpesaAsset()
|
|
|
|
amount, err := userStore.ReadEntry(ctx, sessionId, storedb.DATA_AMOUNT)
|
|
if err != nil {
|
|
logg.ErrorCtxf(ctx, "failed to read amount entry", "key", storedb.DATA_AMOUNT, "error", err)
|
|
return res, err
|
|
}
|
|
|
|
// Call the trigger onramp API
|
|
triggerOnramp, err := h.accountService.MpesaTriggerOnramp(ctx, string(publicKey), phoneNumber, defaultAsset, string(amount))
|
|
if err != nil {
|
|
flag_api_call_error, _ := h.flagManager.GetFlag("flag_api_call_error")
|
|
res.FlagSet = append(res.FlagSet, flag_api_call_error)
|
|
res.Content = l.Get("Your request failed. Please try again later.")
|
|
logg.ErrorCtxf(ctx, "failed on MpesaTriggerOnramp", "error", err)
|
|
return res, nil
|
|
}
|
|
|
|
logg.InfoCtxf(ctx, "MpesaTriggerOnramp", "transactionCode", triggerOnramp.TransactionCode)
|
|
|
|
res.Content = l.Get("Your request has been sent. Thank you for using Sarafu")
|
|
res.FlagReset = append(res.FlagReset, flag_account_authorized)
|
|
return res, nil
|
|
}
|