added the swap preview vis files

services/registration/swap_limit

@@ -0,0 +1 @@
+{{.swap_max_limit}}

services/registration/swap_limit.vis

@@ -0,0 +1,7 @@
+LOAD swap_max_limit 0
+CATCH _ flag_incorrect_voucher 1
+MAP swap_max_limit
+MOUT back 0
+HALT
+INCMP _ 0
+INCMP swap_preview *

services/registration/swap_limit_swa

@@ -0,0 +1 @@
+{{.swap_max_limit}}

services/registration/swap_preview

@@ -0,0 +1,3 @@
+{{.swap_preview}}
+
+Please enter your PIN to confirm:

services/registration/swap_preview.vis

@@ -0,0 +1,11 @@
+LOAD swap_preview 0
+MAP swap_preview
+MOUT back 0
+MOUT quit 9
+LOAD authorize_account 6
+HALT
+RELOAD authorize_account
+CATCH incorrect_pin flag_incorrect_pin 1
+INCMP _ 0
+INCMP quit 9
+INCMP swap_initiated *

services/registration/swap_preview_swa

@@ -0,0 +1,3 @@
+{{.swap_preview}}
+
+Tafadhali weka PIN yako kudhibitisha:

store/db/db.go

@@ -63,6 +63,24 @@ const (
 	DATA_INITIAL_LANGUAGE_CODE
 	//Fully qualified account alias string
 	DATA_ACCOUNT_ALIAS
+	// Holds the active pool contract address for the swap
+	DATA_ACTIVE_POOL_ADDRESS
+	// Currently active swap from symbol for the swap
+	DATA_ACTIVE_SWAP_FROM_SYM
+	// Currently active swap from decimal count for the swap
+	DATA_ACTIVE_SWAP_FROM_DECIMAL
+	// Holds the active swap from contract address for the swap
+	DATA_ACTIVE_SWAP_FROM_ADDRESS
+	// Currently active swap from to for the swap
+	DATA_ACTIVE_SWAP_TO_SYM
+	// Currently active swap to decimal count for the swap
+	DATA_ACTIVE_SWAP_TO_DECIMAL
+	// Holds the active pool contract address for the swap
+	DATA_ACTIVE_SWAP_TO_ADDRESS
+	// Holds the max swap amount for the swap
+	DATA_ACTIVE_SWAP_MAX_AMOUNT
+	// Holds the active swap amount for the swap
+	DATA_ACTIVE_SWAP_AMOUNT
 )
 
 const (
@@ -108,6 +126,22 @@ const (
 	DATA_POOL_SYMBOLS
 	// List of contact addresses in the top pools context
 	DATA_POOL_ADDRESSES
+	// List of swap from voucher symbols in the user context.
+	DATA_POOL_FROM_SYMBOLS
+	// List of swap from balances for vouchers valid in the pools context.
+	DATA_POOL_FROM_BALANCES
+	// List of swap from decimal counts for vouchers valid in the pools context.
+	DATA_POOL_FROM_DECIMALS
+	// List of swap from EVM addresses for vouchers valid in the pools context.
+	DATA_POOL_FROM_ADDRESSES
+	// List of swap to voucher symbols in the user context.
+	DATA_POOL_TO_SYMBOLS
+	// List of swap to balances for vouchers valid in the pools context.
+	DATA_POOL_TO_BALANCES
+	// List of swap to decimal counts for vouchers valid in the pools context.
+	DATA_POOL_TO_DECIMALS
+	// List of swap to EVM addresses for vouchers valid in the pools context.
+	DATA_POOL_TO_ADDRESSES
 )
 
 var (

store/pools.go

@@ -1,9 +1,11 @@
 package store
 
 import (
+	"context"
 	"fmt"
 	"strings"
 
+	storedb "git.grassecon.net/grassrootseconomics/sarafu-vise/store/db"
 	dataserviceapi "github.com/grassrootseconomics/ussd-data-service/pkg/api"
 )
 
@@ -31,3 +33,61 @@ func ProcessPools(pools []dataserviceapi.PoolDetails) PoolsMetadata {
 
 	return data
 }
+
+// GetPoolData retrieves and matches pool data
+// if no match is found, it fetches the API with the symbol
+func GetPoolData(ctx context.Context, db storedb.PrefixDb, input string) (*dataserviceapi.PoolDetails, error) {
+	keys := []storedb.DataTyp{
+		storedb.DATA_POOL_NAMES,
+		storedb.DATA_POOL_SYMBOLS,
+		storedb.DATA_POOL_ADDRESSES,
+	}
+	data := make(map[storedb.DataTyp]string)
+
+	for _, key := range keys {
+		value, err := db.Get(ctx, storedb.ToBytes(key))
+		if err != nil {
+			return nil, fmt.Errorf("failed to get prefix key %x: %v", storedb.ToBytes(key), err)
+		}
+		data[key] = string(value)
+	}
+
+	name, symbol, address := MatchPool(input,
+		data[storedb.DATA_POOL_NAMES],
+		data[storedb.DATA_POOL_SYMBOLS],
+		data[storedb.DATA_POOL_ADDRESSES],
+	)
+
+	if symbol == "" {
+		return nil, nil
+	}
+
+	return &dataserviceapi.PoolDetails{
+		PoolName:     string(name),
+		PoolSymbol:         string(symbol),
+		PoolContractAdrress:   string(address),
+	}, nil
+}
+
+// MatchPool finds the matching pool name, symbol and pool contract address based on the input.
+func MatchPool(input, names, symbols, addresses string) (name, symbol, address string) {
+	nameList := strings.Split(names, "\n")
+	symList := strings.Split(symbols, "\n")
+	addrList := strings.Split(addresses, "\n")
+
+	for i, sym := range symList {
+		parts := strings.SplitN(sym, ":", 2)
+
+		if input == parts[0] || strings.EqualFold(input, parts[1]) {
+			symbol = parts[1]
+			if i < len(nameList) {
+				name = strings.SplitN(nameList[i], ":", 2)[1]
+			}
+			if i < len(addrList) {
+				address = strings.SplitN(addrList[i], ":", 2)[1]
+			}
+			break
+		}
+	}
+	return
+}

store/swap_from_vouchers.go

@@ -0,0 +1,65 @@
+package store
+
+import (
+	"context"
+	"fmt"
+	storedb "git.grassecon.net/grassrootseconomics/sarafu-vise/store/db"
+	dataserviceapi "github.com/grassrootseconomics/ussd-data-service/pkg/api"
+)
+
+// GetSwapFromVoucherData retrieves and matches swap from voucher data
+func GetSwapFromVoucherData(ctx context.Context, db storedb.PrefixDb, input string) (*dataserviceapi.TokenHoldings, error) {
+	keys := []storedb.DataTyp{
+		storedb.DATA_POOL_FROM_SYMBOLS,
+		storedb.DATA_POOL_FROM_BALANCES,
+		storedb.DATA_POOL_FROM_DECIMALS,
+		storedb.DATA_POOL_FROM_ADDRESSES,
+	}
+	data := make(map[storedb.DataTyp]string)
+
+	for _, key := range keys {
+		value, err := db.Get(ctx, storedb.ToBytes(key))
+		if err != nil {
+			return nil, fmt.Errorf("failed to get prefix key %x: %v", storedb.ToBytes(key), err)
+		}
+		data[key] = string(value)
+	}
+
+	symbol, balance, decimal, address := MatchVoucher(input,
+		data[storedb.DATA_POOL_FROM_SYMBOLS],
+		data[storedb.DATA_POOL_FROM_BALANCES],
+		data[storedb.DATA_POOL_FROM_DECIMALS],
+		data[storedb.DATA_POOL_FROM_ADDRESSES],
+	)
+
+	if symbol == "" {
+		return nil, nil
+	}
+
+	return &dataserviceapi.TokenHoldings{
+		TokenSymbol:     string(symbol),
+		Balance:         string(balance),
+		TokenDecimals:   string(decimal),
+		ContractAddress: string(address),
+	}, nil
+}
+
+// UpdateSwapFromVoucherData updates the active swap to voucher data in the DataStore.
+func UpdateSwapFromVoucherData(ctx context.Context, store DataStore, sessionId string, data *dataserviceapi.TokenHoldings) error {
+	logg.TraceCtxf(ctx, "dtal", "data", data)
+	// Active swap from voucher data entries
+	activeEntries := map[storedb.DataTyp][]byte{
+		storedb.DATA_ACTIVE_SWAP_FROM_SYM: []byte(data.TokenSymbol),
+		storedb.DATA_ACTIVE_SWAP_FROM_DECIMAL: []byte(data.TokenDecimals),
+		storedb.DATA_ACTIVE_SWAP_FROM_ADDRESS: []byte(data.ContractAddress),
+	}
+
+	// Write active data
+	for key, value := range activeEntries {
+		if err := store.WriteEntry(ctx, sessionId, key, value); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}

store/swap_to_vouchers.go

@@ -0,0 +1,65 @@
+package store
+
+import (
+	"context"
+	"fmt"
+	storedb "git.grassecon.net/grassrootseconomics/sarafu-vise/store/db"
+	dataserviceapi "github.com/grassrootseconomics/ussd-data-service/pkg/api"
+)
+
+// GetSwapToVoucherData retrieves and matches voucher data
+func GetSwapToVoucherData(ctx context.Context, db storedb.PrefixDb, input string) (*dataserviceapi.TokenHoldings, error) {
+	keys := []storedb.DataTyp{
+		storedb.DATA_POOL_TO_SYMBOLS,
+		storedb.DATA_POOL_TO_BALANCES,
+		storedb.DATA_POOL_TO_DECIMALS,
+		storedb.DATA_POOL_TO_ADDRESSES,
+	}
+	data := make(map[storedb.DataTyp]string)
+
+	for _, key := range keys {
+		value, err := db.Get(ctx, storedb.ToBytes(key))
+		if err != nil {
+			return nil, fmt.Errorf("failed to get prefix key %x: %v", storedb.ToBytes(key), err)
+		}
+		data[key] = string(value)
+	}
+
+	symbol, balance, decimal, address := MatchVoucher(input,
+		data[storedb.DATA_POOL_TO_SYMBOLS],
+		data[storedb.DATA_POOL_TO_BALANCES],
+		data[storedb.DATA_POOL_TO_DECIMALS],
+		data[storedb.DATA_POOL_TO_ADDRESSES],
+	)
+
+	if symbol == "" {
+		return nil, nil
+	}
+
+	return &dataserviceapi.TokenHoldings{
+		TokenSymbol:     string(symbol),
+		Balance:         string(balance),
+		TokenDecimals:   string(decimal),
+		ContractAddress: string(address),
+	}, nil
+}
+
+// UpdateSwapToVoucherData updates the active swap to voucher data in the DataStore.
+func UpdateSwapToVoucherData(ctx context.Context, store DataStore, sessionId string, data *dataserviceapi.TokenHoldings) error {
+	logg.TraceCtxf(ctx, "dtal", "data", data)
+	// Active swap to voucher data entries
+	activeEntries := map[storedb.DataTyp][]byte{
+		storedb.DATA_ACTIVE_SWAP_TO_SYM: []byte(data.TokenSymbol),
+		storedb.DATA_ACTIVE_SWAP_TO_DECIMAL: []byte(data.TokenDecimals),
+		storedb.DATA_ACTIVE_SWAP_TO_ADDRESS: []byte(data.ContractAddress),
+	}
+
+	// Write active data
+	for key, value := range activeEntries {
+		if err := store.WriteEntry(ctx, sessionId, key, value); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}