wallet domain finished

ADD | add AllowUseDBGenericFunc interface to generic funcs constraint & debug sth
ADD | general instant queries & debug sth
2026-05-09 02:33:52 +03:30 · 2026-05-08 17:37:58 +03:30 · 2026-05-08 16:06:54 +03:30 · 2026-05-08 04:28:50 +03:30 · 2026-05-08 03:58:56 +03:30
36 changed files with 4313 additions and 65 deletions
--- a/domain/wallet/entity/transaction.go
+++ b/domain/wallet/entity/transaction.go
@ -1,16 +1,24 @@
 package entity

-import "time"
+import (
+	"time"
+
+	"git.gocasts.ir/ebhomengo/niki/pkg/types"
+	"github.com/shopspring/decimal"
+)

 type Transaction struct {
 	ID         uint64
 	UserID     uint64
-	Amount     float64
-	Currency   Currency
+	Amount     decimal.Decimal
+	Currency   types.Currency
 	ActionType TransactionType
 	Timestamp  time.Time
+	CreatedAt  time.Time
 }

+func (T Transaction) UnimplementedAllowUseDBGenericFunc() {}
+
 type TransactionType string

 const (
@ -19,10 +27,3 @@ const (
 	TransactionTypeRefund   TransactionType = "refund"
 	TransactionTypeDonate   TransactionType = "donate"
 )
-
-type Currency string
-
-const (
-	IRR Currency = "IRR"
-	USD Currency = "USD"
-)
--- a/domain/wallet/entity/wallet.go
+++ b/domain/wallet/entity/wallet.go
@ -1,23 +1,28 @@
 package entity

-import "time"
+import (
+	"time"
+
+	"git.gocasts.ir/ebhomengo/niki/pkg/types"
+	"github.com/shopspring/decimal"
+)

 type Wallet struct {
 	ID        uint64
 	UserID    uint64 // user unique ID
-	Balance   float64
-	Currency  Currency
-	UpdatedAt time.Time
+	Balance   decimal.Decimal
+	Currency  types.Currency
 	Status    WalletStatus // "active", "frozen", "closed"
+	UpdatedAt time.Time
+	CreatedAt time.Time
 }

+func (w Wallet) UnimplementedAllowUseDBGenericFunc() {}
+
 type WalletStatus string

 const (
 	Frozen WalletStatus = "frozen" // when need to check , approve ,validate , solve sth (but deposit is possible)
 	Active WalletStatus = "active" // when everything is ok

-	// ??
-	// Closed WalletStatus = "closed" // when need to check , approve ,validate , solve sth (exp : security problem)
-
 )
--- a/domain/wallet/param/create_transaction.go
+++ b/domain/wallet/param/create_transaction.go
@ -1,15 +1,22 @@
 package param

 import (
+	"time"
+
 	"git.gocasts.ir/ebhomengo/niki/domain/wallet/entity"
+	"git.gocasts.ir/ebhomengo/niki/pkg/types"
+	"github.com/shopspring/decimal"
 )

 type CreateTransactionRequest struct {
 	UserID     uint64                 `json:"user_id"`
-	Amount     float64                `json:"amount"`
-	Currency   entity.Currency        `json:"currency"`
+	Amount     string                 `json:"amount"`
+	Currency   types.Currency         `json:"currency"`
 	ActionType entity.TransactionType `json:"action_type"`
+	Timestamp  time.Time              `json:"timestamp"`
 }

 type InsertTransactionResponse struct {
+	Balance  decimal.Decimal `json:"balance"`
+	Currency types.Currency  `json:"currency"`
 }
--- a/domain/wallet/param/transaction_history.go
+++ b/domain/wallet/param/transaction_history.go
@ -4,21 +4,26 @@ import (
 	"time"

 	"git.gocasts.ir/ebhomengo/niki/domain/wallet/entity"
+	"git.gocasts.ir/ebhomengo/niki/pkg/database/postgres"
+	"git.gocasts.ir/ebhomengo/niki/pkg/types"
+	"github.com/shopspring/decimal"
 )

 type TransactionRequest struct {
-	UserID uint64 `json:"user_id"`
+	UserID     uint64                     `json:"user_id"`
+	Pagination postgres.RequestPagination `json:"pagination"`
 }

 type TransactionResponse struct {
-	Transaction []TransactionInfo `json:"transaction"`
+	Transaction []TransactionInfo           `json:"transactions"`
+	Pagination  postgres.ResponsePagination `json:"pagination"`
 }

 type TransactionInfo struct {
 	ID         uint64                 `json:"id"`
 	UserID     uint64                 `json:"user_id"`
-	Amount     float64                `json:"amount"`
-	Currency   entity.Currency        `json:"currency"`
+	Amount     decimal.Decimal        `json:"amount,string"`
+	Currency   types.Currency         `json:"currency"`
 	ActionType entity.TransactionType `json:"action_type"`
 	Timestamp  time.Time              `json:"timestamp"`
 }
--- a/domain/wallet/param/wallet_info.go
+++ b/domain/wallet/param/wallet_info.go
@ -4,6 +4,8 @@ import (
 	"time"

 	"git.gocasts.ir/ebhomengo/niki/domain/wallet/entity"
+	"git.gocasts.ir/ebhomengo/niki/pkg/types"
+	"github.com/shopspring/decimal"
 )

 type WalletRequest struct {
@ -13,9 +15,9 @@ type WalletRequest struct {
 type WalletResponse struct {
 	Wallet WalletInfo `json:"wallet"`
 }
-
 type WalletInfo struct {
-	Balance   float64             `json:"balance"`
+	Balance   decimal.Decimal     `json:"balance,string"`
 	UpdatedAt time.Time           `json:"updated_at"`
 	Status    entity.WalletStatus `json:"status"`
+	Currency  types.Currency      `json:"currency"`
 }
--- a/domain/wallet/repository/postgres/db.go
+++ b/domain/wallet/repository/postgres/db.go
@ -2,8 +2,12 @@ package postgres

 import "git.gocasts.ir/ebhomengo/niki/pkg/database/postgres"

+type Config struct {
+}
+
 type DB struct {
-	conn *postgres.DB
+	conn   *postgres.DB
+	Config Config
 }

 func New(conn *postgres.DB) *DB {
--- a/domain/wallet/repository/postgres/get_transaction_list.go
+++ b/domain/wallet/repository/postgres/get_transaction_list.go
@ -0,0 +1,109 @@
+package postgres
+
+import (
+	"context"
+
+	"git.gocasts.ir/ebhomengo/niki/domain/wallet/entity"
+	"git.gocasts.ir/ebhomengo/niki/pkg/database/postgres"
+	richerror "git.gocasts.ir/ebhomengo/niki/pkg/rich_error"
+)
+
+func (db *DB) GetTransactionListByUserID(ctx context.Context, userID uint64, dbPagination postgres.DBPagination) ([]entity.Transaction, int64, error) {
+	const op = richerror.Op("Wallet.repo.GetTransactionListByUserID")
+
+	countQuery := "SELECT COUNT(*) FROM transactions WHERE user_id = $1"
+	fetchQuery := `SELECT *  FROM Transactions WHERE user_id = $1 ORDER BY created_at DESC  LIMIT $2 OFFSET $3`
+
+	countQueryStmt := postgres.StatementKeyAWalletGetTotalCountTransactionHistory
+	fetchQueryStmt := postgres.StatementKeyAWalletGetTransactionHistory
+
+	PageOffset := (dbPagination.PageNumber - 1) * dbPagination.PageSize // offset
+
+	PageSize := dbPagination.PageSize //limit
+
+	countParams := []any{userID}                       // $1
+	fetchParams := []any{userID, PageSize, PageOffset} // $1 , $2 , $3
+	//
+	//
+	///////////////////////////  with generic pagination package
+
+	transactionsList, totalItemsCount, err := postgres.PageNumberPagination[entity.Transaction](ctx, countQuery, fetchQuery,
+		db.conn, countQueryStmt, fetchQueryStmt, op,
+		scanTransaction, countParams, fetchParams,
+	)
+	if err != nil {
+		return nil, 0, richerror.New(op).WithErr(err)
+	}
+
+	return transactionsList, totalItemsCount, nil
+
+	///////////////////////////  normal
+
+	//var totalCount int64
+	//
+	//countStmt, CountStErr := db.conn.PrepareStatement(ctx, countQueryStmt, countQuery)
+	//
+	//if CountStErr != nil {
+	//
+	//	return nil, 0, richerror.New(op).WithErr(CountStErr).WithKind(richerror.KindUnexpected).WithMessage(errmsg.ErrorMsgFailedQuery)
+	//
+	//}
+	//countErr := countStmt.QueryRowContext(ctx, userID).Scan(&totalCount)
+	//
+	//if countErr != nil {
+	//	return nil, 0, richerror.New(op).WithErr(CountStErr).WithKind(richerror.KindUnexpected).WithMessage(errmsg.ErrorMsgFailedQuery)
+	//
+	//}
+	//
+	////// get records
+	//
+	//stmt, StErr := db.conn.PrepareStatement(ctx, fetchQueryStmt, fetchQuery)
+	//
+	//if StErr != nil {
+	//
+	//	return nil, 0, richerror.New(op).WithErr(StErr).WithKind(richerror.KindUnexpected).WithMessage(errmsg.ErrorMsgFailedQuery)
+	//
+	//}
+	//
+	//offset := (dbPagination.PageNumber - 1) * dbPagination.PageSize
+	//
+	//limit := dbPagination.PageSize
+	//
+	//queryRows, qrErr := stmt.QueryContext(ctx, userID, limit, offset)
+	//
+	//if qrErr != nil {
+	//	return nil, 0, richerror.New(op).WithErr(qrErr).WithKind(richerror.KindUnexpected).WithMessage(errmsg.ErrorMsgFailedQuery)
+	//}
+	//
+	//defer queryRows.Close()
+	//
+	//var transactions []entity.Transaction
+	//
+	//for queryRows.Next() {
+	//
+	//	transaction, err := scanTransaction(queryRows)
+	//
+	//	if err != nil {
+	//		return nil, 0, richerror.New(op).WithErr(err).WithKind(richerror.KindUnexpected).WithMessage(errmsg.ErrorMsgCantScanQueryResult)
+	//	}
+	//
+	//	transactions = append(transactions, transaction)
+	//
+	//}
+	//
+	//if qErr := queryRows.Err(); qErr != nil {
+	//
+	//	return nil, 0, richerror.New(op).WithErr(qErr).WithKind(richerror.KindUnexpected).WithMessage(errmsg.ErrorMsgCantScanQueryResult)
+	//}
+	//
+	//return transactions, totalCount, nil
+
+}
+
+func scanTransaction(scanner postgres.Scanner) (transaction entity.Transaction, err error) {
+	err = scanner.Scan(&transaction.ID, &transaction.UserID, &transaction.Amount, &transaction.Currency, &transaction.ActionType, &transaction.Timestamp, &transaction.CreatedAt)
+	if err != nil {
+		return
+	}
+	return
+}
--- a/domain/wallet/repository/postgres/get_wallet.go
+++ b/domain/wallet/repository/postgres/get_wallet.go
@ -0,0 +1,54 @@
+package postgres
+
+import (
+	"context"
+
+	"git.gocasts.ir/ebhomengo/niki/domain/wallet/entity"
+	"git.gocasts.ir/ebhomengo/niki/pkg/database/postgres"
+	richerror "git.gocasts.ir/ebhomengo/niki/pkg/rich_error"
+)
+
+func (db *DB) GetWalletByUserID(ctx context.Context, UserID uint64) (entity.Wallet, error) {
+
+	const op = richerror.Op("Wallet.repo.GetWalletByUserID")
+
+	query := `SELECT * FROM wallets WHERE  user_id = $1`
+
+	/////////////// use instant query
+
+	wallet, err := postgres.InstantQueryRowContext[entity.Wallet](ctx, postgres.StatementKeyWalletGetUserWallet, query, db.conn, scanWallet, UserID)
+	if err != nil {
+		return entity.Wallet{}, richerror.New(op).WithErr(err)
+	}
+
+	return wallet, nil
+
+	//////////////////////normal
+
+	//stmt, stErr := db.conn.PrepareStatement(ctx, postgres.StatementKeyWalletGetUserWallet, query)
+	//if stErr != nil {
+	//	return entity.Wallet{}, richerror.New(op).WithErr(stErr)
+	//}
+	//walletRow := db.conn.StmtQueryRowContext(ctx, stmt, UserID)
+	//
+	//wallet, sErr := scanWallet(walletRow)
+	//
+	//if sErr != nil {
+	//	return entity.Wallet{}, richerror.New(op).WithErr(sErr)
+	//}
+	//
+	//return wallet, nil
+
+}
+
+func scanWallet(scanner postgres.Scanner) (entity.Wallet, error) {
+
+	var wallet entity.Wallet
+
+	err := scanner.Scan(&wallet.ID, &wallet.UserID, &wallet.Balance, &wallet.Currency, &wallet.Status, &wallet.UpdatedAt, &wallet.CreatedAt, &wallet.CreatedAt)
+	if err != nil {
+		return entity.Wallet{}, err
+	}
+
+	return wallet, nil
+}
--- a/domain/wallet/repository/postgres/insert_transaction.go
+++ b/domain/wallet/repository/postgres/insert_transaction.go
@ -0,0 +1,105 @@
+package postgres
+
+import (
+	"context"
+	"time"
+
+	"git.gocasts.ir/ebhomengo/niki/domain/wallet/entity"
+	"git.gocasts.ir/ebhomengo/niki/pkg/database/postgres"
+	errmsg "git.gocasts.ir/ebhomengo/niki/pkg/err_msg"
+	richerror "git.gocasts.ir/ebhomengo/niki/pkg/rich_error"
+	"git.gocasts.ir/ebhomengo/niki/pkg/types"
+	"github.com/shopspring/decimal"
+)
+
+func (db *DB) InsertTransaction(ctx context.Context, transaction entity.Transaction, currencyRate decimal.Decimal) (balance decimal.Decimal, currency types.Currency, err error) {
+	const op = richerror.Op("wallet.repo.InsertTransaction")
+
+	// TODO : USE TX INSTANT QUERY
+
+	query := `INSERT INTO  Transactions (user_id, amount ,currency ,action_type, timestamp) values ($1, $2, $3, $4, $5)`
+
+	stmt, stErr := db.conn.PrepareStatement(ctx, postgres.StatementKeyWalletInsertTransaction, query)
+	if stErr != nil {
+		err = richerror.New(op).WithErr(stErr).WithKind(richerror.KindUnexpected)
+		return
+	}
+
+	txHolder, newCtx := postgres.GetDBTxHolderFromContextOrNew(ctx)
+	tx, txErr := txHolder.BeginTx(newCtx, db.conn.Conn())
+	if txErr != nil {
+		err = richerror.New(op).WithErr(txErr).WithKind(richerror.KindUnexpected)
+		return
+	}
+
+	defer func() {
+		if tx != nil {
+			if err != nil {
+				if rbErr := tx.Rollback(); rbErr != nil {
+					// log rbErr
+				}
+			} else if cErr := tx.Commit(); cErr != nil {
+				// log cErr
+			}
+
+		}
+
+	}()
+
+	params := []any{transaction.UserID, transaction.Amount, transaction.Currency, transaction.ActionType, transaction.Timestamp}
+
+	_, execErr := tx.StmtExecContext(newCtx, stmt, params...)
+	if execErr != nil {
+		err = richerror.New(op).WithErr(execErr).WithKind(richerror.KindUnexpected).WithMessage(errmsg.ErrorMsgFailedQuery)
+
+		return
+	}
+
+	newBalance, walletCurrency, balanceErr := db.UpsertBalance(newCtx, transaction, currencyRate)
+	if balanceErr != nil {
+		err = richerror.New(op).WithErr(balanceErr)
+		return
+
+	}
+
+	balance = newBalance
+	currency = walletCurrency
+	return
+}
+
+func (db *DB) UpsertBalance(newCtx context.Context, transaction entity.Transaction, currencyRate decimal.Decimal) (balance decimal.Decimal, currency types.Currency, err error) {
+	const op = richerror.Op("wallet.repo.UpdateBalance")
+
+	txHolder, _ := postgres.GetDBTxHolderFromContextOrNew(newCtx)
+	tx, txErr := txHolder.Conn()
+
+	if txErr != nil {
+		err = richerror.New(op).WithMessage(errmsg.ErrorMsgFailedQuery).WithKind(richerror.KindUnexpected)
+		return
+	}
+
+	if tx == nil {
+		err = richerror.New(op).WithMessage(errmsg.ErrorMsgFailedQuery).WithKind(richerror.KindUnexpected)
+		return
+	}
+
+	upsertQuery := `INSERT INTO wallets (user_id, balance ,  updated_at) VALUES ($1,$2,$3 )
+	ON CONFLICT (user_id) DO UPDATE SET balance = wallets.balance + $2
+	RETURNING balance , currency`
+
+	upsertStmt, stErr := db.conn.PrepareStatement(newCtx, postgres.StatementKeyWalletUpsertBalance, upsertQuery)
+	if stErr != nil {
+		err = richerror.New(op).WithMessage(errmsg.ErrorMsgFailedQuery).WithKind(richerror.KindUnexpected)
+		return
+	}
+	amount := transaction.Amount.Mul(currencyRate)
+	row := tx.StmtQueryRowContext(newCtx, upsertStmt, transaction.UserID, amount, time.Now())
+
+	sErr := row.Scan(&balance, &currency)
+	if sErr != nil {
+		err = richerror.New(op).WithMessage(errmsg.ErrorMsgCantScanQueryResult).WithKind(richerror.KindUnexpected)
+		return
+	}
+
+	return
+}
--- a/domain/wallet/repository/postgres/migrations/0001_add_transaction_table.sql
+++ b/domain/wallet/repository/postgres/migrations/0001_add_transaction_table.sql
@ -0,0 +1,17 @@
+-- +migrate Up
+
+CREATE TABLE "transaction" (
+                               "id" BIGSERIAL PRIMARY KEY,
+                               "user_id" BIGINT NOT NULL,
+                               "amount" NUMERIC(20, 2) NOT NULL,
+                               "currency" VARCHAR(100) NOT NULL,
+                               "action_type" VARCHAR(100) NOT NULL,
+                               "timestamp" TIMESTAMP NOT NULL,
+                               "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+
+
+
+-- +migrate Down
+DROP TABLE IF EXISTS "transaction";
--- a/domain/wallet/repository/postgres/migrations/0002_add_wallet_table.sql
+++ b/domain/wallet/repository/postgres/migrations/0002_add_wallet_table.sql
@ -0,0 +1,18 @@
+-- +migrate Up
+
+CREATE TABLE "wallets" (
+                               "id" BIGSERIAL PRIMARY KEY,
+                               "user_id" BIGINT NOT NULL,
+                               "balance" NUMERIC(20, 2) NOT NULL,
+                               "currency" VARCHAR(100) NOT NULL DEFAULT 'IRR',
+                               "status" VARCHAR(100) NOT NULL DEFAULT 'active',
+                               "updated_at" TIMESTAMP,
+                               "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+
+);
+
+
+
+
+-- +migrate Down
+DROP TABLE IF EXISTS "wallets";
--- a/domain/wallet/service/create_transaction.go
+++ b/domain/wallet/service/create_transaction.go
@ -7,25 +7,51 @@ import (
 	"git.gocasts.ir/ebhomengo/niki/domain/wallet/entity"
 	"git.gocasts.ir/ebhomengo/niki/domain/wallet/param"
 	richerror "git.gocasts.ir/ebhomengo/niki/pkg/rich_error"
+	"git.gocasts.ir/ebhomengo/niki/pkg/types"
+
+	//"git.gocasts.ir/ebhomengo/niki/pkg/types"
+	"github.com/shopspring/decimal"
 )

 func (s Service) CreateTransaction(ctx context.Context, request param.CreateTransactionRequest) (param.InsertTransactionResponse, error) {

 	const op = richerror.Op("wallet.service.CreateTransaction")

+	currencyRate := s.convertCurrency(request.Currency)
+
+	convertedAmount, _ := decimal.NewFromString(request.Amount)
+
 	transaction := entity.Transaction{
 		ID:         0,
 		UserID:     request.UserID,
-		Amount:     request.Amount,
+		Amount:     convertedAmount,
 		Currency:   request.Currency,
 		ActionType: request.ActionType,
-		Timestamp:  time.Now(),
-	}
-	err := s.repo.InsertTransaction(ctx, transaction)
-	if err != nil {
-		return param.InsertTransactionResponse{}, err
+		Timestamp:  request.Timestamp,
+		CreatedAt:  time.Now(),
 	}

-	return param.InsertTransactionResponse{}, nil
+	balance, walletCurrency, inErr := s.repo.InsertTransaction(ctx, transaction, currencyRate)
+	if inErr != nil {
+		return param.InsertTransactionResponse{}, richerror.New(op).WithErr(inErr)
+	}
+
+	return param.InsertTransactionResponse{Balance: balance, Currency: walletCurrency}, nil
+
+}
+
+func (s Service) convertCurrency(currency types.Currency) decimal.Decimal {
+
+	if currency != types.IRR {
+		currencyRate, cErr := s.currencyRateProvider.GetCurrencyPriceRateInIRR(currency)
+		if cErr != nil {
+			// log //  fallback or change provider
+			return decimal.Zero // if 0 => transaction commited with currency but wallet doesn't update or add 0 to wallet
+		}
+
+		return currencyRate
+
+	}
+	return decimal.NewFromInt(1)

 }
--- a/domain/wallet/service/get_user_wallet.go
+++ b/domain/wallet/service/get_user_wallet.go
@ -13,12 +13,13 @@ func (s Service) GetUserWallet(ctx context.Context, request param.WalletRequest)
 	wallet, err := s.repo.GetWalletByUserID(ctx, request.UserID)

 	if err != nil {
-		return param.WalletResponse{}, err
+		return param.WalletResponse{}, richerror.New(op).WithErr(err)
 	}

 	return param.WalletResponse{
 		Wallet: param.WalletInfo{
 			Balance:   wallet.Balance,
+			Currency:  wallet.Currency,
 			UpdatedAt: wallet.UpdatedAt,
 			Status:    wallet.Status,
 		},
--- a/domain/wallet/service/service.go
+++ b/domain/wallet/service/service.go
@ -4,20 +4,29 @@ import (
 	"context"

 	"git.gocasts.ir/ebhomengo/niki/domain/wallet/entity"
+	"git.gocasts.ir/ebhomengo/niki/pkg/database/postgres"
+	"git.gocasts.ir/ebhomengo/niki/pkg/types"
+	"github.com/shopspring/decimal"
 )

+type CurrencyRateProvider interface {
+	GetCurrencyPriceRateInIRR(currency types.Currency) (decimal.Decimal, error)
+}
+
 type Repository interface {
-	GetTransactionListByUserID(ctx context.Context, UserID uint64) ([]entity.Transaction, error)
+	GetTransactionListByUserID(ctx context.Context, UserID uint64, DBPagination postgres.DBPagination) ([]entity.Transaction, int64, error)
 	GetWalletByUserID(ctx context.Context, UserID uint64) (entity.Wallet, error)
-	InsertTransaction(ctx context.Context, transaction entity.Transaction) error
+	InsertTransaction(ctx context.Context, transaction entity.Transaction, currencyRate decimal.Decimal) (decimal.Decimal, types.Currency, error)
 }

 type Config struct {
+	PageSize int64 `koanf:"page_size"`
 }

 type Service struct {
-	repo Repository
-	cfg  Config
+	repo                 Repository
+	cfg                  Config
+	currencyRateProvider CurrencyRateProvider
 }

 func New(repo Repository, cfg Config) Service {
--- a/domain/wallet/service/transaction_history.go
+++ b/domain/wallet/service/transaction_history.go
@ -5,19 +5,36 @@ import (

 	"git.gocasts.ir/ebhomengo/niki/domain/wallet/entity"
 	"git.gocasts.ir/ebhomengo/niki/domain/wallet/param"
+	"git.gocasts.ir/ebhomengo/niki/pkg/database/postgres"
 	richerror "git.gocasts.ir/ebhomengo/niki/pkg/rich_error"
 )

 func (s Service) GetUserTransactionHistory(ctx context.Context, request param.TransactionRequest) (param.TransactionResponse, error) {
 	const op = richerror.Op("wallet.service.GetUserTransactionHistory")

-	transactionList, err := s.repo.GetTransactionListByUserID(ctx, request.UserID)
-
-	if err != nil {
-		return param.TransactionResponse{}, err
+	dbPagination := postgres.DBPagination{
+		PageNumber: request.Pagination.PageNumber,
+		PageSize:   s.cfg.PageSize,
 	}

-	return param.TransactionResponse{Transaction: transactionEntityToTransactionInfo(transactionList)}, nil
+	transactionList, totalCount, err := s.repo.GetTransactionListByUserID(ctx, request.UserID, dbPagination)
+
+	if err != nil {
+		return param.TransactionResponse{}, richerror.New(op).WithErr(err)
+	}
+
+	totalPages := (totalCount + s.cfg.PageSize - 1) / s.cfg.PageSize
+
+	paginationInfo := postgres.ResponsePagination{
+		PageNumber: request.Pagination.PageNumber,
+		PageSize:   s.cfg.PageSize,
+		TotalPages: totalPages,
+	}
+
+	return param.TransactionResponse{
+		Transaction: transactionEntityToTransactionInfo(transactionList),
+		Pagination:  paginationInfo,
+	}, nil

 }

--- a/go.mod
+++ b/go.mod
@ -21,6 +21,7 @@ require (
 	github.com/ory/dockertest/v3 v3.12.0
 	github.com/redis/go-redis/v9 v9.18.0
 	github.com/rubenv/sql-migrate v1.8.1
+	github.com/shopspring/decimal v1.4.0
 	github.com/spf13/cobra v1.10.2
 	github.com/stretchr/testify v1.11.1
 	github.com/swaggo/echo-swagger v1.5.2
--- a/go.sum
+++ b/go.sum
@ -366,6 +366,8 @@ github.com/ryanuber/columnize v0.0.0-20160712163229-9b3edd62028f/go.mod h1:sm1tb
 github.com/ryanuber/columnize v2.1.0+incompatible/go.mod h1:sm1tb6uqfes/u+d4ooFouqFdy9/2g9QGwK3SQygK0Ts=
 github.com/ryanuber/go-glob v1.0.0/go.mod h1:807d1WSdnB0XRJzKNil9Om6lcp/3a0v4qIHxIXzX/Yc=
 github.com/sean-/seed v0.0.0-20170313163322-e2103e2c3529/go.mod h1:DxrIzT+xaE7yg65j358z/aeFdxmN0P9QXhEzd20vsDc=
+github.com/shopspring/decimal v1.4.0 h1:bxl37RwXBklmTi0C79JfXCEBD1cqqHt0bbgBAGFp81k=
+github.com/shopspring/decimal v1.4.0/go.mod h1:gawqmDU56v4yIKSwfBSFip1HdCCXN8/+DMd9qYNcwME=
 github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
 github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
 github.com/sirupsen/logrus v1.6.0/go.mod h1:7uNnSEd1DgxDLC74fIahvMZmmYsHGZGEOFrfsX/uA88=
--- a/pkg/database/postgres/db.go
+++ b/pkg/database/postgres/db.go
@ -3,35 +3,37 @@ package postgres
 import (
 	"context"
 	"database/sql"
+	"errors"
 	"fmt"
 	"sync"
 	"time"

-	querier "git.gocasts.ir/ebhomengo/niki/pkg/query_transaction/sql"
+	errmsg "git.gocasts.ir/ebhomengo/niki/pkg/err_msg"
+	richerror "git.gocasts.ir/ebhomengo/niki/pkg/rich_error"
 	_ "github.com/jackc/pgx/v5/stdlib"
 )
- 
+
 type Config struct {
-	Host             string `koanf:"host"`
-	Port             int    `koanf:"port"`
-	User             string `koanf:"user"`
-	Password         string `koanf:"password"`
-	DbName           string `koanf:"dbName"`
-	SSLMode          string `koanf:"sslMode"`
-	MaxIdleConn      int    `koanf:"maxIdleConns"`
-	MaxOpenConn      int    `koanf:"maxOpenConns"`
-	ConnMaxLifetime  int    `koanf:"connMaxLifetime"`
-	PathOfMigrations string `koanf:"pathOfMigrations"`
+	Host            string `koanf:"host"`
+	Port            int    `koanf:"port"`
+	User            string `koanf:"user"`
+	Password        string `koanf:"password"`
+	DbName          string `koanf:"dbName"`
+	SSLMode         string `koanf:"sslMode"`
+	MaxIdleConn     int    `koanf:"maxIdleConns"`
+	MaxOpenConn     int    `koanf:"maxOpenConns"`
+	ConnMaxLifetime int    `koanf:"connMaxLifetime"`
 }

 type DB struct {
 	config     Config
-	db         *querier.SQLDB
+	db         *sql.DB
 	mu         sync.Mutex
 	statements map[statementKey]*sql.Stmt
 }

-func (db *DB) Conn() *querier.SQLDB {
+func (db *DB) Conn() *sql.DB {
+
 	return db.db
 }

@ -56,7 +58,7 @@ func New(config Config) *DB {

 	return &DB{
 		config:     config,
-		db:         &querier.SQLDB{DB: db},
+		db:         db,
 		statements: make(map[statementKey]*sql.Stmt),
 	}
 }
@ -93,5 +95,118 @@ func (db *DB) CloseStatements() error {
 }

 func (db *DB) Close() error {
-	return db.db.DB.Close()
+	return db.db.Close()
 }
+
+func (db *DB) StmtQueryContext(ctx context.Context, stmt *sql.Stmt, args ...any) (*sql.Rows, error) {
+	return stmt.QueryContext(ctx, args...)
+}
+
+func (db *DB) StmtQueryRowContext(ctx context.Context, stmt *sql.Stmt, args ...any) *sql.Row {
+	return stmt.QueryRowContext(ctx, args...)
+}
+
+func (db *DB) StmtExecContext(ctx context.Context, stmt *sql.Stmt, args ...any) (sql.Result, error) {
+	result, err := stmt.ExecContext(ctx, args...)
+	if err != nil {
+		return nil, err
+	}
+
+	return result, nil
+}
+
+// /////////////////////// generic query
+type AllowUseDBGenericFunc interface {
+	UnimplementedAllowUseDBGenericFunc()
+}
+
+func InstantQueryContext[T AllowUseDBGenericFunc](ctx context.Context, stmtKey statementKey, query string, conn *DB, scanner ScannerFunc[T], args ...any) ([]T, error) {
+	const op = richerror.Op("postgres.InstantQueryContext")
+
+	readyStmt, err := conn.PrepareStatement(ctx, stmtKey, query)
+
+	if err != nil {
+		return nil, richerror.New(op).WithMessage(errmsg.ErrorMsgFailedQuery)
+	}
+
+	rows, qErr := readyStmt.QueryContext(ctx, args...)
+
+	if qErr != nil {
+		return nil, richerror.New(op).WithMessage(errmsg.ErrorMsgFailedQuery)
+	}
+	defer rows.Close()
+
+	var itemsList []T
+
+	for rows.Next() {
+
+		item, sErr := scanner(rows)
+		if sErr != nil {
+			return nil, richerror.New(op).WithErr(sErr).WithMessage(errmsg.ErrorMsgCantScanQueryResult)
+		}
+
+		itemsList = append(itemsList, item)
+
+	}
+
+	if rErr := rows.Err(); rErr != nil {
+		return nil, richerror.New(op).WithErr(rErr).WithMessage(errmsg.ErrorMsgFailedQuery)
+
+	}
+
+	return itemsList, nil
+
+}
+
+func InstantQueryRowContext[T AllowUseDBGenericFunc](ctx context.Context, stmtKey statementKey, query string, conn *DB, scanner ScannerFunc[T], args ...any) (item T, err error) {
+	const op = richerror.Op("postgres.InstantQueryRowContext")
+	readyStmt, sErr := conn.PrepareStatement(ctx, stmtKey, query)
+
+	if sErr != nil {
+		err = richerror.New(op).WithMessage(errmsg.ErrorMsgFailedQuery)
+		return
+	}
+
+	row := readyStmt.QueryRowContext(ctx, args...)
+
+	item, scErr := scanner(row)
+	if scErr != nil {
+		if errors.Is(scErr, sql.ErrNoRows) {
+			err = richerror.New(op).WithErr(scErr).WithKind(richerror.KindNotFound).WithMessage(errmsg.ErrorMsgCantScanQueryResult)
+			return
+
+		}
+		err = richerror.New(op).WithErr(scErr).WithKind(richerror.KindUnexpected).WithMessage(errmsg.ErrorMsgCantScanQueryResult)
+
+		return
+
+	}
+
+	if rErr := row.Err(); rErr != nil {
+		err = richerror.New(op).WithErr(rErr).WithKind(richerror.KindUnexpected).WithMessage(errmsg.ErrorMsgFailedQuery)
+		return
+	}
+
+	return
+
+}
+
+func InstantExecContext[T AllowUseDBGenericFunc](ctx context.Context, stmtKey statementKey, query string, conn *DB, args ...any) (sql.Result, error) {
+	const op = richerror.Op("postgres.InstantExecContext")
+
+	readyStmt, err := conn.PrepareStatement(ctx, stmtKey, query)
+
+	if err != nil {
+		return nil, richerror.New(op)
+	}
+
+	result, err := readyStmt.ExecContext(ctx, args...)
+	if err != nil {
+		return nil, richerror.New(op)
+
+	}
+
+	return result, nil
+}
+
+type ScannerFunc[T any] func(scanner Scanner) (T, error)
--- a/domain/wallet/repository/postgres/dbconfig.yml
+++ b/domain/wallet/repository/postgres/dbconfig.yml
@ -2,4 +2,4 @@ production:
  dialect: postgres
  datasource: "host=127.0.0.1 port=5432 user=wallet password=wallet2123 dbname=wallet_db sslmode=disable"
  dir: domain/wallet/repository/postgres/migrations
-  table: wallet_migrationsns
+  table: gorp_migrationsns
--- a/pkg/database/postgres/migrator/migrator.go
+++ b/pkg/database/postgres/migrator/migrator.go
@ -1 +1,113 @@
 package migrator
+
+import (
+	"database/sql"
+	"fmt"
+	"os"
+	"text/tabwriter"
+
+	"git.gocasts.ir/ebhomengo/niki/pkg/database/postgres"
+	_ "github.com/jackc/pgx/v5/stdlib"
+	migrate "github.com/rubenv/sql-migrate"
+)
+
+type Config struct {
+	migrationDBName  string `koanf:"migration_db_name"`
+	pathOfMigrations string `koanf:"pathOfMigrations"`
+	dbConfig         postgres.Config
+}
+
+type Migrator struct {
+	cfg        Config
+	dialect    string
+	migrations *migrate.FileMigrationSource
+}
+
+func New(cfg Config) *Migrator {
+
+	return &Migrator{
+		cfg:        cfg,
+		dialect:    "psx",
+		migrations: &migrate.FileMigrationSource{Dir: cfg.pathOfMigrations},
+	}
+
+}
+
+func (m *Migrator) getDsn() string {
+
+	return fmt.Sprintf("host=%s user=%s password=%s dbname=%s sslmode=disable",
+		m.cfg.dbConfig.Host, m.cfg.dbConfig.User, m.cfg.dbConfig.Password, m.cfg.dbConfig.DbName)
+
+}
+
+func (m *Migrator) Up() {
+	db, err := sql.Open(m.dialect, m.getDsn())
+
+	if err != nil {
+		panic(fmt.Errorf("can't open postgres db: %v", err))
+
+	}
+
+	defer db.Close()
+	if err != nil {
+		return
+	}
+
+	n, err := migrate.Exec(db, m.dialect, m.migrations, migrate.Up)
+	if err != nil {
+		panic(fmt.Errorf("cant apply migrations : %v ", err))
+
+	}
+	fmt.Printf("Applied %d migrations\n", n)
+
+}
+
+func (m *Migrator) Down() {
+	migrate.SetTable(m.cfg.migrationDBName)
+
+	db, err := sql.Open(m.dialect, m.getDsn())
+
+	if err != nil {
+		panic(fmt.Errorf("can't open postgres db: %v", err))
+
+	}
+	defer db.Close()
+
+	n, err := migrate.Exec(db, m.dialect, m.migrations, migrate.Down)
+
+	if err != nil {
+		panic(fmt.Errorf("cant rollback migrations : %v ", err))
+
+	}
+	fmt.Printf("Applied %d migrations\n", n)
+
+}
+
+func (m *Migrator) Status() {
+	migrate.SetTable(m.cfg.migrationDBName)
+
+	db, err := sql.Open(m.dialect, m.getDsn())
+	if err != nil {
+		panic(fmt.Errorf("can't open postgres db: %v", err))
+	}
+	defer db.Close()
+
+	migrations, _, err := migrate.PlanMigration(db, m.dialect, m.migrations, migrate.Up, 0)
+	if err != nil {
+		panic(fmt.Errorf("can't plan migrations: %v", err))
+	}
+
+	if len(migrations) == 0 {
+		fmt.Println("✅ No pending migrations.")
+		return
+	}
+
+	w := tabwriter.NewWriter(os.Stdout, 0, 0, 3, ' ', 0)
+	fmt.Fprintln(w, "PENDING MIGRATIONS")
+	fmt.Fprintln(w, "ID\tSTATUS")
+	for _, migration := range migrations {
+		fmt.Fprintf(w, "%s\tPending\n", migration.Id)
+	}
+	w.Flush()
+
+}
--- a/pkg/database/postgres/pagination.go
+++ b/pkg/database/postgres/pagination.go
@ -0,0 +1,83 @@
+package postgres
+
+import (
+	"context"
+
+	errmsg "git.gocasts.ir/ebhomengo/niki/pkg/err_msg"
+	richerror "git.gocasts.ir/ebhomengo/niki/pkg/rich_error"
+)
+
+// page number pagination
+
+type RequestPagination struct {
+	PageNumber int64 `json:"page_number"`
+}
+
+type ResponsePagination struct {
+	PageNumber int64 `json:"page_number"`
+	PageSize   int64 `json:"page_size"`
+	TotalPages int64 `json:"total_pages"`
+}
+
+type DBPagination struct {
+	PageNumber int64
+	PageSize   int64
+}
+
+func PageNumberPagination[T AllowUseDBGenericFunc](ctx context.Context, countQuery string, fetchQuery string, conn *DB, countQueryStmt statementKey, fetchQueryStmt statementKey, op richerror.Op, scanner ScannerFunc[T], countParams []any, fetchParams []any) ([]T, int64, error) {
+
+	var totalCount int64
+
+	countStmt, CountStErr := conn.PrepareStatement(ctx, countQueryStmt, countQuery)
+
+	if CountStErr != nil {
+
+		return nil, 0, richerror.New(op).WithErr(CountStErr).WithKind(richerror.KindUnexpected).WithMessage(errmsg.ErrorMsgFailedQuery)
+
+	}
+	countErr := countStmt.QueryRowContext(ctx, countParams...).Scan(&totalCount)
+
+	if countErr != nil {
+		return nil, 0, richerror.New(op).WithErr(countErr).WithKind(richerror.KindUnexpected).WithMessage(errmsg.ErrorMsgFailedQuery)
+
+	}
+
+	//// get records
+
+	stmt, StErr := conn.PrepareStatement(ctx, fetchQueryStmt, fetchQuery)
+
+	if StErr != nil {
+
+		return nil, 0, richerror.New(op).WithErr(StErr).WithKind(richerror.KindUnexpected).WithMessage(errmsg.ErrorMsgFailedQuery)
+
+	}
+
+	queryRows, qrErr := stmt.QueryContext(ctx, fetchParams...)
+
+	if qrErr != nil {
+		return nil, 0, richerror.New(op).WithErr(qrErr).WithKind(richerror.KindUnexpected).WithMessage(errmsg.ErrorMsgFailedQuery)
+	}
+
+	defer queryRows.Close()
+
+	var itemsList []T
+
+	for queryRows.Next() {
+
+		item, err := scanner(queryRows)
+
+		if err != nil {
+			return nil, 0, richerror.New(op).WithErr(err).WithKind(richerror.KindUnexpected).WithMessage(errmsg.ErrorMsgCantScanQueryResult)
+		}
+
+		itemsList = append(itemsList, item)
+
+	}
+
+	if qErr := queryRows.Err(); qErr != nil {
+
+		return nil, 0, richerror.New(op).WithErr(qErr).WithKind(richerror.KindUnexpected).WithMessage(errmsg.ErrorMsgFailedQuery)
+	}
+
+	return itemsList, totalCount, nil
+}
--- a/pkg/database/postgres/prepared_statement.go
+++ b/pkg/database/postgres/prepared_statement.go
@ -3,7 +3,9 @@ package postgres
 type statementKey uint

 const (
-	StatementKeyAWalletGetTransactionHistory statementKey = iota + 1
-	StatementKeyWalletInsertTransaction
-	StatementKeyWalletGetUserWallet
+	StatementKeyAWalletGetTransactionHistory           statementKey = iota + 1 //wallet
+	StatementKeyAWalletGetTotalCountTransactionHistory                         //wallet
+	StatementKeyWalletInsertTransaction                                        //wallet
+	StatementKeyWalletGetUserWallet                                            //wallet
+	StatementKeyWalletUpsertBalance                                            //wallet
 )
--- a/pkg/database/postgres/scanner.go
+++ b/pkg/database/postgres/scanner.go
@ -0,0 +1,5 @@
+package postgres
+
+type Scanner interface {
+	Scan(dest ...any) error
+}
--- a/pkg/database/postgres/transaction_handler.go
+++ b/pkg/database/postgres/transaction_handler.go
@ -0,0 +1,277 @@
+package postgres
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"fmt"
+	"sync"
+
+	errmsg "git.gocasts.ir/ebhomengo/niki/pkg/err_msg"
+	richerror "git.gocasts.ir/ebhomengo/niki/pkg/rich_error"
+	"github.com/lib/pq"
+)
+
+type contextKey string
+
+const DBTxHolderContextKey contextKey = "txholder"
+
+type conn interface {
+	Commit() error
+	Rollback() error
+	QueryContext(ctx context.Context, query string, args ...any) (*sql.Rows, error)
+	QueryRowContext(ctx context.Context, query string, args ...any) *sql.Row
+	ExecContext(ctx context.Context, query string, args ...any) (sql.Result, error)
+	StmtQueryContext(ctx context.Context, stmt *sql.Stmt, args ...any) (*sql.Rows, error)
+	StmtQueryRowContext(ctx context.Context, stmt *sql.Stmt, args ...any) *sql.Row
+	StmtExecContext(ctx context.Context, stmt *sql.Stmt, args ...any) (sql.Result, error)
+}
+
+type TxConn struct {
+	*sql.Tx
+}
+
+type DBTxHolder struct {
+	conn conn
+	mu   sync.Mutex
+}
+
+func (db *DBTxHolder) Conn() (conn, error) {
+	if db.conn == nil {
+		return nil, fmt.Errorf("Conn() called before BeginTx()")
+	}
+	return db.conn, nil
+}
+
+func GetDBTxHolderFromContextOrNew(ctx context.Context) (*DBTxHolder, context.Context) {
+	db, ok := ctx.Value(DBTxHolderContextKey).(*DBTxHolder)
+	if !ok {
+		db = &DBTxHolder{
+			conn: nil,
+		}
+		ctx = context.WithValue(ctx, DBTxHolderContextKey, db)
+	}
+
+	return db, ctx
+}
+
+func (db *DBTxHolder) BeginTx(ctx context.Context, conn *sql.DB) (conn, error) {
+	dbTransactionConn, err := db.Continue(ctx, conn)
+	if err != nil {
+		return nil, err
+	}
+	return dbTransactionConn, nil
+}
+
+func (db *DBTxHolder) Continue(ctx context.Context, conn *sql.DB) (conn, error) {
+	//db.mu.Lock()
+	//defer db.mu.Unlock()
+
+	var err error
+	if db.conn == nil {
+
+		db.conn, err = db.txFactory(ctx, conn)
+		if err != nil {
+			return nil, err
+		}
+
+	}
+
+	return db.conn, err
+}
+
+func (db *DBTxHolder) txFactory(ctx context.Context, rConn *sql.DB) (*TxConn, error) {
+
+	tx, bErr := rConn.BeginTx(ctx, nil)
+	if bErr != nil {
+
+		return nil, bErr
+	}
+
+	return &TxConn{Tx: tx}, nil
+}
+
+func (db *DBTxHolder) Commit() error {
+	//db.mu.Lock()
+	//defer db.mu.Unlock()
+	if db.conn == nil {
+		return fmt.Errorf("no active transaction")
+	}
+	err := db.conn.Commit()
+	db.conn = nil
+	return err
+}
+
+func (db *DBTxHolder) Rollback() error {
+	//db.mu.Lock()
+	//defer db.mu.Unlock()
+	if db.conn == nil {
+		return fmt.Errorf("no active transaction")
+	}
+	err := db.conn.Rollback()
+	db.conn = nil
+
+	return err
+}
+
+func (db *DBTxHolder) SavePoint(ctx context.Context, key string) error {
+	//db.mu.Lock()
+	//defer db.mu.Unlock()
+	if db.conn == nil {
+		return fmt.Errorf("no active transaction")
+	}
+	quoted := pq.QuoteIdentifier(key)
+	_, err := db.conn.ExecContext(ctx, "SAVEPOINT "+quoted)
+	return err
+}
+
+func (db *DBTxHolder) RollbackSavePoint(ctx context.Context, key string) error {
+	//db.mu.Lock()
+	//defer db.mu.Unlock()
+	if db.conn == nil {
+		return fmt.Errorf("no active transaction")
+	}
+
+	quoted := pq.QuoteIdentifier(key)
+
+	_, err := db.conn.ExecContext(ctx, "ROLLBACK TO SAVEPOINT "+quoted)
+
+	if err != nil {
+		return err
+
+	}
+
+	return nil
+
+}
+
+func (db *DBTxHolder) ReleaseSavePoint(ctx context.Context, key string) error {
+	//db.mu.Lock()
+	//defer db.mu.Unlock()
+	if db.conn == nil {
+		return fmt.Errorf("no active transaction")
+	}
+	quoted := pq.QuoteIdentifier(key)
+	_, err := db.conn.ExecContext(ctx, "RELEASE SAVEPOINT "+quoted)
+
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (tx *TxConn) StmtQueryContext(ctx context.Context, stmt *sql.Stmt, args ...any) (*sql.Rows, error) {
+	txStmt := tx.StmtContext(ctx, stmt)
+	return txStmt.QueryContext(ctx, args...)
+}
+
+func (tx *TxConn) StmtQueryRowContext(ctx context.Context, stmt *sql.Stmt, args ...any) *sql.Row {
+	txStmt := tx.StmtContext(ctx, stmt)
+	return txStmt.QueryRowContext(ctx, args...)
+}
+
+func (tx *TxConn) StmtExecContext(ctx context.Context, stmt *sql.Stmt, args ...any) (sql.Result, error) {
+	txStmt := tx.StmtContext(ctx, stmt)
+	result, err := txStmt.ExecContext(ctx, args...)
+	if err != nil {
+		return nil, err
+	}
+
+	return result, nil
+}
+
+///////////////////////// generic query
+
+func TXInstantQueryContext[T AllowUseDBGenericFunc](ctx context.Context, txConn *sql.Tx, stmtKey statementKey, query string, conn *DB, scanner ScannerFunc[T], args ...any) ([]T, error) {
+	const op = richerror.Op("postgres.TXInstantQueryContext")
+
+	stmt, err := conn.PrepareStatement(ctx, stmtKey, query)
+
+	if err != nil {
+		return nil, richerror.New(op).WithMessage(errmsg.ErrorMsgFailedQuery)
+	}
+
+	txStmt := txConn.StmtContext(ctx, stmt)
+
+	rows, qErr := txStmt.QueryContext(ctx, args...)
+
+	if qErr != nil {
+		return nil, richerror.New(op).WithMessage(errmsg.ErrorMsgFailedQuery)
+	}
+	defer rows.Close()
+
+	var itemsList []T
+
+	for rows.Next() {
+
+		item, sErr := scanner(rows)
+		if sErr != nil {
+			return nil, richerror.New(op).WithErr(sErr).WithMessage(errmsg.ErrorMsgCantScanQueryResult)
+		}
+
+		itemsList = append(itemsList, item)
+
+	}
+
+	if rErr := rows.Err(); rErr != nil {
+		return nil, richerror.New(op).WithErr(rErr).WithMessage(errmsg.ErrorMsgFailedQuery)
+
+	}
+
+	return itemsList, nil
+
+}
+
+func TXInstantQueryRowContext[T AllowUseDBGenericFunc](ctx context.Context, txConn *sql.Tx, stmtKey statementKey, query string, conn *DB, scanner ScannerFunc[T], args ...any) (item T, err error) {
+	const op = richerror.Op("postgres.TXInstantQueryRowContext")
+
+	stmt, sErr := conn.PrepareStatement(ctx, stmtKey, query)
+
+	if sErr != nil {
+		err = richerror.New(op).WithMessage(errmsg.ErrorMsgFailedQuery)
+		return
+	}
+	txStmt := txConn.StmtContext(ctx, stmt)
+
+	row := txStmt.QueryRowContext(ctx, args...)
+
+	item, scErr := scanner(row)
+	if scErr != nil {
+		if errors.Is(scErr, sql.ErrNoRows) {
+			err = richerror.New(op).WithErr(scErr).WithKind(richerror.KindNotFound).WithMessage(errmsg.ErrorMsgCantScanQueryResult)
+			return
+
+		}
+		err = richerror.New(op).WithErr(scErr).WithKind(richerror.KindUnexpected).WithMessage(errmsg.ErrorMsgCantScanQueryResult)
+
+		return
+
+	}
+
+	if rErr := row.Err(); rErr != nil {
+		err = richerror.New(op).WithErr(rErr).WithKind(richerror.KindUnexpected).WithMessage(errmsg.ErrorMsgFailedQuery)
+		return
+	}
+
+	return
+
+}
+
+func TXInstantExecContext[T AllowUseDBGenericFunc](ctx context.Context, txConn *sql.Tx, stmtKey statementKey, query string, conn *DB, args ...any) (sql.Result, error) {
+	const op = richerror.Op("postgres.TXInstantExecContext")
+
+	stmt, err := conn.PrepareStatement(ctx, stmtKey, query)
+
+	if err != nil {
+		return nil, richerror.New(op)
+	}
+	txStmt := txConn.StmtContext(ctx, stmt)
+
+	result, err := txStmt.ExecContext(ctx, args...)
+	if err != nil {
+		return nil, richerror.New(op)
+
+	}
+
+	return result, nil
+}
--- a/pkg/err_msg/message.go
+++ b/pkg/err_msg/message.go
@ -58,4 +58,5 @@ const (
 	ErrorMsgInvalidRefreshToken                = "invalid refresh token"
 	ErrorMsgInvalidBenefactorStatus            = "invalid benefactor status"
 	ErrorMsgInvalidAction                      = "action invalid"
+	ErrorMsgFailedQuery                        = "query failed" // wallet
 )
--- a/pkg/types/currency.go
+++ b/pkg/types/currency.go
@ -0,0 +1,21 @@
+package types
+
+import "errors"
+
+type Currency string
+
+const (
+	IRR Currency = "IRR"
+	USD Currency = "USD"
+)
+
+func StringCastToCurrency(s string) (Currency, error) {
+	switch s {
+	case "IRR":
+		return IRR, nil
+	case "USD":
+		return USD, nil
+	default:
+		return IRR, errors.New("not a valid currency")
+	}
+}
--- a/vendor/github.com/shopspring/decimal/.gitignore
+++ b/vendor/github.com/shopspring/decimal/.gitignore
@ -0,0 +1,9 @@
+.git
+*.swp
+
+# IntelliJ
+.idea/
+*.iml
+
+# VS code
+*.code-workspace
--- a/vendor/github.com/shopspring/decimal/CHANGELOG.md
+++ b/vendor/github.com/shopspring/decimal/CHANGELOG.md
@ -0,0 +1,76 @@
+## Decimal v1.4.0
+#### BREAKING
+- Drop support for Go version older than 1.10 [#361](https://github.com/shopspring/decimal/pull/361)
+
+#### FEATURES
+- Add implementation of natural logarithm [#339](https://github.com/shopspring/decimal/pull/339) [#357](https://github.com/shopspring/decimal/pull/357)
+- Add improved implementation of power operation [#358](https://github.com/shopspring/decimal/pull/358)
+- Add Compare method which forwards calls to Cmp [#346](https://github.com/shopspring/decimal/pull/346)
+- Add NewFromBigRat constructor [#288](https://github.com/shopspring/decimal/pull/288)
+- Add NewFromUint64 constructor [#352](https://github.com/shopspring/decimal/pull/352)
+
+#### ENHANCEMENTS
+- Migrate to Github Actions [#245](https://github.com/shopspring/decimal/pull/245) [#340](https://github.com/shopspring/decimal/pull/340)
+- Fix examples for RoundDown, RoundFloor, RoundUp, and RoundCeil [#285](https://github.com/shopspring/decimal/pull/285) [#328](https://github.com/shopspring/decimal/pull/328) [#341](https://github.com/shopspring/decimal/pull/341)
+- Use Godoc standard to mark deprecated Equals and StringScaled methods [#342](https://github.com/shopspring/decimal/pull/342)
+- Removed unnecessary min function for RescalePair method [#265](https://github.com/shopspring/decimal/pull/265)
+- Avoid reallocation of initial slice in MarshalBinary (GobEncode) [#355](https://github.com/shopspring/decimal/pull/355)
+- Optimize NumDigits method [#301](https://github.com/shopspring/decimal/pull/301) [#356](https://github.com/shopspring/decimal/pull/356)
+- Optimize BigInt method [#359](https://github.com/shopspring/decimal/pull/359)
+- Support scanning uint64 [#131](https://github.com/shopspring/decimal/pull/131) [#364](https://github.com/shopspring/decimal/pull/364)
+- Add docs section with alternative libraries [#363](https://github.com/shopspring/decimal/pull/363)
+
+#### BUGFIXES
+- Fix incorrect calculation of decimal modulo [#258](https://github.com/shopspring/decimal/pull/258) [#317](https://github.com/shopspring/decimal/pull/317)
+- Allocate new(big.Int) in Copy method to deeply clone it [#278](https://github.com/shopspring/decimal/pull/278)
+- Fix overflow edge case in QuoRem method [#322](https://github.com/shopspring/decimal/pull/322)
+
+## Decimal v1.3.1
+
+#### ENHANCEMENTS
+- Reduce memory allocation in case of initialization from big.Int [#252](https://github.com/shopspring/decimal/pull/252)
+
+#### BUGFIXES
+- Fix binary marshalling of decimal zero value  [#253](https://github.com/shopspring/decimal/pull/253)
+
+## Decimal v1.3.0
+
+#### FEATURES
+- Add NewFromFormattedString initializer [#184](https://github.com/shopspring/decimal/pull/184)
+- Add NewNullDecimal initializer [#234](https://github.com/shopspring/decimal/pull/234)
+- Add implementation of natural exponent function (Taylor, Hull-Abraham) [#229](https://github.com/shopspring/decimal/pull/229)
+- Add RoundUp, RoundDown, RoundCeil, RoundFloor methods [#196](https://github.com/shopspring/decimal/pull/196) [#202](https://github.com/shopspring/decimal/pull/202) [#220](https://github.com/shopspring/decimal/pull/220)
+- Add XML support for NullDecimal [#192](https://github.com/shopspring/decimal/pull/192)
+- Add IsInteger method [#179](https://github.com/shopspring/decimal/pull/179)
+- Add Copy helper method [#123](https://github.com/shopspring/decimal/pull/123)
+- Add InexactFloat64 helper method [#205](https://github.com/shopspring/decimal/pull/205)
+- Add CoefficientInt64 helper method [#244](https://github.com/shopspring/decimal/pull/244)
+
+#### ENHANCEMENTS
+- Performance optimization of NewFromString init method [#198](https://github.com/shopspring/decimal/pull/198)
+- Performance optimization of Abs and Round methods [#240](https://github.com/shopspring/decimal/pull/240)
+- Additional tests (CI) for ppc64le architecture [#188](https://github.com/shopspring/decimal/pull/188)
+
+#### BUGFIXES
+- Fix rounding in FormatFloat fallback path (roundShortest method, fix taken from Go main repository) [#161](https://github.com/shopspring/decimal/pull/161)
+- Add slice range checks to UnmarshalBinary method [#232](https://github.com/shopspring/decimal/pull/232)
+
+## Decimal v1.2.0
+
+#### BREAKING
+- Drop support for Go version older than 1.7 [#172](https://github.com/shopspring/decimal/pull/172)
+
+#### FEATURES
+- Add NewFromInt and NewFromInt32 initializers [#72](https://github.com/shopspring/decimal/pull/72)
+- Add support for Go modules [#157](https://github.com/shopspring/decimal/pull/157)
+- Add BigInt, BigFloat helper methods [#171](https://github.com/shopspring/decimal/pull/171)
+
+#### ENHANCEMENTS
+- Memory usage optimization [#160](https://github.com/shopspring/decimal/pull/160)
+- Updated travis CI golang versions [#156](https://github.com/shopspring/decimal/pull/156)
+- Update documentation [#173](https://github.com/shopspring/decimal/pull/173)
+- Improve code quality [#174](https://github.com/shopspring/decimal/pull/174)
+
+#### BUGFIXES
+- Revert remove insignificant digits [#159](https://github.com/shopspring/decimal/pull/159)
+- Remove 15 interval for RoundCash [#166](https://github.com/shopspring/decimal/pull/166)
--- a/vendor/github.com/shopspring/decimal/LICENSE
+++ b/vendor/github.com/shopspring/decimal/LICENSE
@ -0,0 +1,45 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 Spring, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
+- Based on https://github.com/oguzbilgic/fpd, which has the following license:
+"""
+The MIT License (MIT)
+
+Copyright (c) 2013 Oguz Bilgic
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+"""
--- a/vendor/github.com/shopspring/decimal/README.md
+++ b/vendor/github.com/shopspring/decimal/README.md
@ -0,0 +1,139 @@
+# decimal
+
+[![ci](https://github.com/shopspring/decimal/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/shopspring/decimal/actions/workflows/ci.yml)
+[![GoDoc](https://godoc.org/github.com/shopspring/decimal?status.svg)](https://godoc.org/github.com/shopspring/decimal) 
+[![Go Report Card](https://goreportcard.com/badge/github.com/shopspring/decimal)](https://goreportcard.com/report/github.com/shopspring/decimal)
+
+Arbitrary-precision fixed-point decimal numbers in go.
+
+_Note:_ Decimal library can "only" represent numbers with a maximum of 2^31 digits after the decimal point.
+
+## Features
+
+ * The zero-value is 0, and is safe to use without initialization
+ * Addition, subtraction, multiplication with no loss of precision
+ * Division with specified precision
+ * Database/sql serialization/deserialization
+ * JSON and XML serialization/deserialization
+
+## Install
+
+Run `go get github.com/shopspring/decimal`
+
+## Requirements 
+
+Decimal library requires Go version `>=1.10`
+
+## Documentation
+
+http://godoc.org/github.com/shopspring/decimal
+
+
+## Usage
+
+```go
+package main
+
+import (
+	"fmt"
+	"github.com/shopspring/decimal"
+)
+
+func main() {
+	price, err := decimal.NewFromString("136.02")
+	if err != nil {
+		panic(err)
+	}
+
+	quantity := decimal.NewFromInt(3)
+
+	fee, _ := decimal.NewFromString(".035")
+	taxRate, _ := decimal.NewFromString(".08875")
+
+	subtotal := price.Mul(quantity)
+
+	preTax := subtotal.Mul(fee.Add(decimal.NewFromFloat(1)))
+
+	total := preTax.Mul(taxRate.Add(decimal.NewFromFloat(1)))
+
+	fmt.Println("Subtotal:", subtotal)                      // Subtotal: 408.06
+	fmt.Println("Pre-tax:", preTax)                         // Pre-tax: 422.3421
+	fmt.Println("Taxes:", total.Sub(preTax))                // Taxes: 37.482861375
+	fmt.Println("Total:", total)                            // Total: 459.824961375
+	fmt.Println("Tax rate:", total.Sub(preTax).Div(preTax)) // Tax rate: 0.08875
+}
+```
+
+## Alternative libraries
+
+When working with decimal numbers, you might face problems this library is not perfectly suited for. 
+Fortunately, thanks to the wonderful community we have a dozen other libraries that you can choose from.  
+Explore other alternatives to find the one that best fits your needs :)  
+
+* [cockroachdb/apd](https://github.com/cockroachdb/apd) - arbitrary precision, mutable and rich API similar to `big.Int`, more performant than this library 
+* [alpacahq/alpacadecimal](https://github.com/alpacahq/alpacadecimal) - high performance, low precision (12 digits), fully compatible API with this library 
+* [govalues/decimal](https://github.com/govalues/decimal) - high performance, zero-allocation, low precision (19 digits)
+* [greatcloak/decimal](https://github.com/greatcloak/decimal) - fork focusing on billing and e-commerce web application related use cases, includes out-of-the-box BSON marshaling support
+
+## FAQ
+
+#### Why don't you just use float64?
+
+Because float64 (or any binary floating point type, actually) can't represent
+numbers such as `0.1` exactly.
+
+Consider this code: http://play.golang.org/p/TQBd4yJe6B You might expect that
+it prints out `10`, but it actually prints `9.999999999999831`. Over time,
+these small errors can really add up!
+
+#### Why don't you just use big.Rat?
+
+big.Rat is fine for representing rational numbers, but Decimal is better for
+representing money. Why? Here's a (contrived) example:
+
+Let's say you use big.Rat, and you have two numbers, x and y, both
+representing 1/3, and you have `z = 1 - x - y = 1/3`. If you print each one
+out, the string output has to stop somewhere (let's say it stops at 3 decimal
+digits, for simplicity), so you'll get 0.333, 0.333, and 0.333. But where did
+the other 0.001 go?
+
+Here's the above example as code: http://play.golang.org/p/lCZZs0w9KE
+
+With Decimal, the strings being printed out represent the number exactly. So,
+if you have `x = y = 1/3` (with precision 3), they will actually be equal to
+0.333, and when you do `z = 1 - x - y`, `z` will be equal to .334. No money is
+unaccounted for!
+
+You still have to be careful. If you want to split a number `N` 3 ways, you
+can't just send `N/3` to three different people. You have to pick one to send
+`N - (2/3*N)` to. That person will receive the fraction of a penny remainder.
+
+But, it is much easier to be careful with Decimal than with big.Rat.
+
+#### Why isn't the API similar to big.Int's?
+
+big.Int's API is built to reduce the number of memory allocations for maximal
+performance. This makes sense for its use-case, but the trade-off is that the
+API is awkward and easy to misuse.
+
+For example, to add two big.Ints, you do: `z := new(big.Int).Add(x, y)`. A
+developer unfamiliar with this API might try to do `z := a.Add(a, b)`. This
+modifies `a` and sets `z` as an alias for `a`, which they might not expect. It
+also modifies any other aliases to `a`.
+
+Here's an example of the subtle bugs you can introduce with big.Int's API:
+https://play.golang.org/p/x2R_78pa8r
+
+In contrast, it's difficult to make such mistakes with decimal. Decimals
+behave like other go numbers types: even though `a = b` will not deep copy
+`b` into `a`, it is impossible to modify a Decimal, since all Decimal methods
+return new Decimals and do not modify the originals. The downside is that
+this causes extra allocations, so Decimal is less performant.  My assumption
+is that if you're using Decimals, you probably care more about correctness
+than performance.
+
+## License
+
+The MIT License (MIT)
+
+This is a heavily modified fork of [fpd.Decimal](https://github.com/oguzbilgic/fpd), which was also released under the MIT License.
--- a/vendor/github.com/shopspring/decimal/const.go
+++ b/vendor/github.com/shopspring/decimal/const.go
@ -0,0 +1,63 @@
+package decimal
+
+import (
+	"strings"
+)
+
+const (
+	strLn10 = "2.302585092994045684017991454684364207601101488628772976033327900967572609677352480235997205089598298341967784042286248633409525465082806756666287369098781689482907208325554680843799894826233198528393505308965377732628846163366222287698219886746543667474404243274365155048934314939391479619404400222105101714174800368808401264708068556774321622835522011480466371565912137345074785694768346361679210180644507064800027750268491674655058685693567342067058113642922455440575892572420824131469568901675894025677631135691929203337658714166023010570308963457207544037084746994016826928280848118428931484852494864487192780967627127577539702766860595249671667418348570442250719796500471495105049221477656763693866297697952211071826454973477266242570942932258279850258550978526538320760672631716430950599508780752371033310119785754733154142180842754386359177811705430982748238504564801909561029929182431823752535770975053956518769751037497088869218020518933950723853920514463419726528728696511086257149219884997874887377134568620916705849807828059751193854445009978131146915934666241071846692310107598438319191292230792503747298650929009880391941702654416816335727555703151596113564846546190897042819763365836983716328982174407366009162177850541779276367731145041782137660111010731042397832521894898817597921798666394319523936855916447118246753245630912528778330963604262982153040874560927760726641354787576616262926568298704957954913954918049209069438580790032763017941503117866862092408537949861264933479354871737451675809537088281067452440105892444976479686075120275724181874989395971643105518848195288330746699317814634930000321200327765654130472621883970596794457943468343218395304414844803701305753674262153675579814770458031413637793236291560128185336498466942261465206459942072917119370602444929358037007718981097362533224548366988505528285966192805098447175198503666680874970496982273220244823343097169111136813588418696549323714996941979687803008850408979618598756579894836445212043698216415292987811742973332588607915912510967187510929248475023930572665446276200923068791518135803477701295593646298412366497023355174586195564772461857717369368404676577047874319780573853271810933883496338813069945569399346101090745616033312247949360455361849123333063704751724871276379140924398331810164737823379692265637682071706935846394531616949411701841938119405416449466111274712819705817783293841742231409930022911502362192186723337268385688273533371925103412930705632544426611429765388301822384091026198582888433587455960453004548370789052578473166283701953392231047527564998119228742789713715713228319641003422124210082180679525276689858180956119208391760721080919923461516952599099473782780648128058792731993893453415320185969711021407542282796298237068941764740642225757212455392526179373652434440560595336591539160312524480149313234572453879524389036839236450507881731359711238145323701508413491122324390927681724749607955799151363982881058285740538000653371655553014196332241918087621018204919492651483892"
+)
+
+var (
+	ln10 = newConstApproximation(strLn10)
+)
+
+type constApproximation struct {
+	exact          Decimal
+	approximations []Decimal
+}
+
+func newConstApproximation(value string) constApproximation {
+	parts := strings.Split(value, ".")
+	coeff, fractional := parts[0], parts[1]
+
+	coeffLen := len(coeff)
+	maxPrecision := len(fractional)
+
+	var approximations []Decimal
+	for p := 1; p < maxPrecision; p *= 2 {
+		r := RequireFromString(value[:coeffLen+p])
+		approximations = append(approximations, r)
+	}
+
+	return constApproximation{
+		RequireFromString(value),
+		approximations,
+	}
+}
+
+// Returns the smallest approximation available that's at least as precise
+// as the passed precision (places after decimal point), i.e. Floor[ log2(precision) ] + 1
+func (c constApproximation) withPrecision(precision int32) Decimal {
+	i := 0
+
+	if precision >= 1 {
+		i++
+	}
+
+	for precision >= 16 {
+		precision /= 16
+		i += 4
+	}
+
+	for precision >= 2 {
+		precision /= 2
+		i++
+	}
+
+	if i >= len(c.approximations) {
+		return c.exact
+	}
+
+	return c.approximations[i]
+}
--- a/vendor/github.com/shopspring/decimal/decimal-go.go
+++ b/vendor/github.com/shopspring/decimal/decimal-go.go
@ -0,0 +1,415 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Multiprecision decimal numbers.
+// For floating-point formatting only; not general purpose.
+// Only operations are assign and (binary) left/right shift.
+// Can do binary floating point in multiprecision decimal precisely
+// because 2 divides 10; cannot do decimal floating point
+// in multiprecision binary precisely.
+
+package decimal
+
+type decimal struct {
+	d     [800]byte // digits, big-endian representation
+	nd    int       // number of digits used
+	dp    int       // decimal point
+	neg   bool      // negative flag
+	trunc bool      // discarded nonzero digits beyond d[:nd]
+}
+
+func (a *decimal) String() string {
+	n := 10 + a.nd
+	if a.dp > 0 {
+		n += a.dp
+	}
+	if a.dp < 0 {
+		n += -a.dp
+	}
+
+	buf := make([]byte, n)
+	w := 0
+	switch {
+	case a.nd == 0:
+		return "0"
+
+	case a.dp <= 0:
+		// zeros fill space between decimal point and digits
+		buf[w] = '0'
+		w++
+		buf[w] = '.'
+		w++
+		w += digitZero(buf[w : w+-a.dp])
+		w += copy(buf[w:], a.d[0:a.nd])
+
+	case a.dp < a.nd:
+		// decimal point in middle of digits
+		w += copy(buf[w:], a.d[0:a.dp])
+		buf[w] = '.'
+		w++
+		w += copy(buf[w:], a.d[a.dp:a.nd])
+
+	default:
+		// zeros fill space between digits and decimal point
+		w += copy(buf[w:], a.d[0:a.nd])
+		w += digitZero(buf[w : w+a.dp-a.nd])
+	}
+	return string(buf[0:w])
+}
+
+func digitZero(dst []byte) int {
+	for i := range dst {
+		dst[i] = '0'
+	}
+	return len(dst)
+}
+
+// trim trailing zeros from number.
+// (They are meaningless; the decimal point is tracked
+// independent of the number of digits.)
+func trim(a *decimal) {
+	for a.nd > 0 && a.d[a.nd-1] == '0' {
+		a.nd--
+	}
+	if a.nd == 0 {
+		a.dp = 0
+	}
+}
+
+// Assign v to a.
+func (a *decimal) Assign(v uint64) {
+	var buf [24]byte
+
+	// Write reversed decimal in buf.
+	n := 0
+	for v > 0 {
+		v1 := v / 10
+		v -= 10 * v1
+		buf[n] = byte(v + '0')
+		n++
+		v = v1
+	}
+
+	// Reverse again to produce forward decimal in a.d.
+	a.nd = 0
+	for n--; n >= 0; n-- {
+		a.d[a.nd] = buf[n]
+		a.nd++
+	}
+	a.dp = a.nd
+	trim(a)
+}
+
+// Maximum shift that we can do in one pass without overflow.
+// A uint has 32 or 64 bits, and we have to be able to accommodate 9<<k.
+const uintSize = 32 << (^uint(0) >> 63)
+const maxShift = uintSize - 4
+
+// Binary shift right (/ 2) by k bits.  k <= maxShift to avoid overflow.
+func rightShift(a *decimal, k uint) {
+	r := 0 // read pointer
+	w := 0 // write pointer
+
+	// Pick up enough leading digits to cover first shift.
+	var n uint
+	for ; n>>k == 0; r++ {
+		if r >= a.nd {
+			if n == 0 {
+				// a == 0; shouldn't get here, but handle anyway.
+				a.nd = 0
+				return
+			}
+			for n>>k == 0 {
+				n = n * 10
+				r++
+			}
+			break
+		}
+		c := uint(a.d[r])
+		n = n*10 + c - '0'
+	}
+	a.dp -= r - 1
+
+	var mask uint = (1 << k) - 1
+
+	// Pick up a digit, put down a digit.
+	for ; r < a.nd; r++ {
+		c := uint(a.d[r])
+		dig := n >> k
+		n &= mask
+		a.d[w] = byte(dig + '0')
+		w++
+		n = n*10 + c - '0'
+	}
+
+	// Put down extra digits.
+	for n > 0 {
+		dig := n >> k
+		n &= mask
+		if w < len(a.d) {
+			a.d[w] = byte(dig + '0')
+			w++
+		} else if dig > 0 {
+			a.trunc = true
+		}
+		n = n * 10
+	}
+
+	a.nd = w
+	trim(a)
+}
+
+// Cheat sheet for left shift: table indexed by shift count giving
+// number of new digits that will be introduced by that shift.
+//
+// For example, leftcheats[4] = {2, "625"}.  That means that
+// if we are shifting by 4 (multiplying by 16), it will add 2 digits
+// when the string prefix is "625" through "999", and one fewer digit
+// if the string prefix is "000" through "624".
+//
+// Credit for this trick goes to Ken.
+
+type leftCheat struct {
+	delta  int    // number of new digits
+	cutoff string // minus one digit if original < a.
+}
+
+var leftcheats = []leftCheat{
+	// Leading digits of 1/2^i = 5^i.
+	// 5^23 is not an exact 64-bit floating point number,
+	// so have to use bc for the math.
+	// Go up to 60 to be large enough for 32bit and 64bit platforms.
+	/*
+		seq 60 | sed 's/^/5^/' | bc |
+		awk 'BEGIN{ print "\t{ 0, \"\" }," }
+		{
+			log2 = log(2)/log(10)
+			printf("\t{ %d, \"%s\" },\t// * %d\n",
+				int(log2*NR+1), $0, 2**NR)
+		}'
+	*/
+	{0, ""},
+	{1, "5"},                                           // * 2
+	{1, "25"},                                          // * 4
+	{1, "125"},                                         // * 8
+	{2, "625"},                                         // * 16
+	{2, "3125"},                                        // * 32
+	{2, "15625"},                                       // * 64
+	{3, "78125"},                                       // * 128
+	{3, "390625"},                                      // * 256
+	{3, "1953125"},                                     // * 512
+	{4, "9765625"},                                     // * 1024
+	{4, "48828125"},                                    // * 2048
+	{4, "244140625"},                                   // * 4096
+	{4, "1220703125"},                                  // * 8192
+	{5, "6103515625"},                                  // * 16384
+	{5, "30517578125"},                                 // * 32768
+	{5, "152587890625"},                                // * 65536
+	{6, "762939453125"},                                // * 131072
+	{6, "3814697265625"},                               // * 262144
+	{6, "19073486328125"},                              // * 524288
+	{7, "95367431640625"},                              // * 1048576
+	{7, "476837158203125"},                             // * 2097152
+	{7, "2384185791015625"},                            // * 4194304
+	{7, "11920928955078125"},                           // * 8388608
+	{8, "59604644775390625"},                           // * 16777216
+	{8, "298023223876953125"},                          // * 33554432
+	{8, "1490116119384765625"},                         // * 67108864
+	{9, "7450580596923828125"},                         // * 134217728
+	{9, "37252902984619140625"},                        // * 268435456
+	{9, "186264514923095703125"},                       // * 536870912
+	{10, "931322574615478515625"},                      // * 1073741824
+	{10, "4656612873077392578125"},                     // * 2147483648
+	{10, "23283064365386962890625"},                    // * 4294967296
+	{10, "116415321826934814453125"},                   // * 8589934592
+	{11, "582076609134674072265625"},                   // * 17179869184
+	{11, "2910383045673370361328125"},                  // * 34359738368
+	{11, "14551915228366851806640625"},                 // * 68719476736
+	{12, "72759576141834259033203125"},                 // * 137438953472
+	{12, "363797880709171295166015625"},                // * 274877906944
+	{12, "1818989403545856475830078125"},               // * 549755813888
+	{13, "9094947017729282379150390625"},               // * 1099511627776
+	{13, "45474735088646411895751953125"},              // * 2199023255552
+	{13, "227373675443232059478759765625"},             // * 4398046511104
+	{13, "1136868377216160297393798828125"},            // * 8796093022208
+	{14, "5684341886080801486968994140625"},            // * 17592186044416
+	{14, "28421709430404007434844970703125"},           // * 35184372088832
+	{14, "142108547152020037174224853515625"},          // * 70368744177664
+	{15, "710542735760100185871124267578125"},          // * 140737488355328
+	{15, "3552713678800500929355621337890625"},         // * 281474976710656
+	{15, "17763568394002504646778106689453125"},        // * 562949953421312
+	{16, "88817841970012523233890533447265625"},        // * 1125899906842624
+	{16, "444089209850062616169452667236328125"},       // * 2251799813685248
+	{16, "2220446049250313080847263336181640625"},      // * 4503599627370496
+	{16, "11102230246251565404236316680908203125"},     // * 9007199254740992
+	{17, "55511151231257827021181583404541015625"},     // * 18014398509481984
+	{17, "277555756156289135105907917022705078125"},    // * 36028797018963968
+	{17, "1387778780781445675529539585113525390625"},   // * 72057594037927936
+	{18, "6938893903907228377647697925567626953125"},   // * 144115188075855872
+	{18, "34694469519536141888238489627838134765625"},  // * 288230376151711744
+	{18, "173472347597680709441192448139190673828125"}, // * 576460752303423488
+	{19, "867361737988403547205962240695953369140625"}, // * 1152921504606846976
+}
+
+// Is the leading prefix of b lexicographically less than s?
+func prefixIsLessThan(b []byte, s string) bool {
+	for i := 0; i < len(s); i++ {
+		if i >= len(b) {
+			return true
+		}
+		if b[i] != s[i] {
+			return b[i] < s[i]
+		}
+	}
+	return false
+}
+
+// Binary shift left (* 2) by k bits.  k <= maxShift to avoid overflow.
+func leftShift(a *decimal, k uint) {
+	delta := leftcheats[k].delta
+	if prefixIsLessThan(a.d[0:a.nd], leftcheats[k].cutoff) {
+		delta--
+	}
+
+	r := a.nd         // read index
+	w := a.nd + delta // write index
+
+	// Pick up a digit, put down a digit.
+	var n uint
+	for r--; r >= 0; r-- {
+		n += (uint(a.d[r]) - '0') << k
+		quo := n / 10
+		rem := n - 10*quo
+		w--
+		if w < len(a.d) {
+			a.d[w] = byte(rem + '0')
+		} else if rem != 0 {
+			a.trunc = true
+		}
+		n = quo
+	}
+
+	// Put down extra digits.
+	for n > 0 {
+		quo := n / 10
+		rem := n - 10*quo
+		w--
+		if w < len(a.d) {
+			a.d[w] = byte(rem + '0')
+		} else if rem != 0 {
+			a.trunc = true
+		}
+		n = quo
+	}
+
+	a.nd += delta
+	if a.nd >= len(a.d) {
+		a.nd = len(a.d)
+	}
+	a.dp += delta
+	trim(a)
+}
+
+// Binary shift left (k > 0) or right (k < 0).
+func (a *decimal) Shift(k int) {
+	switch {
+	case a.nd == 0:
+		// nothing to do: a == 0
+	case k > 0:
+		for k > maxShift {
+			leftShift(a, maxShift)
+			k -= maxShift
+		}
+		leftShift(a, uint(k))
+	case k < 0:
+		for k < -maxShift {
+			rightShift(a, maxShift)
+			k += maxShift
+		}
+		rightShift(a, uint(-k))
+	}
+}
+
+// If we chop a at nd digits, should we round up?
+func shouldRoundUp(a *decimal, nd int) bool {
+	if nd < 0 || nd >= a.nd {
+		return false
+	}
+	if a.d[nd] == '5' && nd+1 == a.nd { // exactly halfway - round to even
+		// if we truncated, a little higher than what's recorded - always round up
+		if a.trunc {
+			return true
+		}
+		return nd > 0 && (a.d[nd-1]-'0')%2 != 0
+	}
+	// not halfway - digit tells all
+	return a.d[nd] >= '5'
+}
+
+// Round a to nd digits (or fewer).
+// If nd is zero, it means we're rounding
+// just to the left of the digits, as in
+// 0.09 -> 0.1.
+func (a *decimal) Round(nd int) {
+	if nd < 0 || nd >= a.nd {
+		return
+	}
+	if shouldRoundUp(a, nd) {
+		a.RoundUp(nd)
+	} else {
+		a.RoundDown(nd)
+	}
+}
+
+// Round a down to nd digits (or fewer).
+func (a *decimal) RoundDown(nd int) {
+	if nd < 0 || nd >= a.nd {
+		return
+	}
+	a.nd = nd
+	trim(a)
+}
+
+// Round a up to nd digits (or fewer).
+func (a *decimal) RoundUp(nd int) {
+	if nd < 0 || nd >= a.nd {
+		return
+	}
+
+	// round up
+	for i := nd - 1; i >= 0; i-- {
+		c := a.d[i]
+		if c < '9' { // can stop after this digit
+			a.d[i]++
+			a.nd = i + 1
+			return
+		}
+	}
+
+	// Number is all 9s.
+	// Change to single 1 with adjusted decimal point.
+	a.d[0] = '1'
+	a.nd = 1
+	a.dp++
+}
+
+// Extract integer part, rounded appropriately.
+// No guarantees about overflow.
+func (a *decimal) RoundedInteger() uint64 {
+	if a.dp > 20 {
+		return 0xFFFFFFFFFFFFFFFF
+	}
+	var i int
+	n := uint64(0)
+	for i = 0; i < a.dp && i < a.nd; i++ {
+		n = n*10 + uint64(a.d[i]-'0')
+	}
+	for ; i < a.dp; i++ {
+		n *= 10
+	}
+	if shouldRoundUp(a, a.dp) {
+		n++
+	}
+	return n
+}
--- a/vendor/github.com/shopspring/decimal/decimal.go
+++ b/vendor/github.com/shopspring/decimal/decimal.go
--- a/vendor/github.com/shopspring/decimal/rounding.go
+++ b/vendor/github.com/shopspring/decimal/rounding.go
@ -0,0 +1,160 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Multiprecision decimal numbers.
+// For floating-point formatting only; not general purpose.
+// Only operations are assign and (binary) left/right shift.
+// Can do binary floating point in multiprecision decimal precisely
+// because 2 divides 10; cannot do decimal floating point
+// in multiprecision binary precisely.
+
+package decimal
+
+type floatInfo struct {
+	mantbits uint
+	expbits  uint
+	bias     int
+}
+
+var float32info = floatInfo{23, 8, -127}
+var float64info = floatInfo{52, 11, -1023}
+
+// roundShortest rounds d (= mant * 2^exp) to the shortest number of digits
+// that will let the original floating point value be precisely reconstructed.
+func roundShortest(d *decimal, mant uint64, exp int, flt *floatInfo) {
+	// If mantissa is zero, the number is zero; stop now.
+	if mant == 0 {
+		d.nd = 0
+		return
+	}
+
+	// Compute upper and lower such that any decimal number
+	// between upper and lower (possibly inclusive)
+	// will round to the original floating point number.
+
+	// We may see at once that the number is already shortest.
+	//
+	// Suppose d is not denormal, so that 2^exp <= d < 10^dp.
+	// The closest shorter number is at least 10^(dp-nd) away.
+	// The lower/upper bounds computed below are at distance
+	// at most 2^(exp-mantbits).
+	//
+	// So the number is already shortest if 10^(dp-nd) > 2^(exp-mantbits),
+	// or equivalently log2(10)*(dp-nd) > exp-mantbits.
+	// It is true if 332/100*(dp-nd) >= exp-mantbits (log2(10) > 3.32).
+	minexp := flt.bias + 1 // minimum possible exponent
+	if exp > minexp && 332*(d.dp-d.nd) >= 100*(exp-int(flt.mantbits)) {
+		// The number is already shortest.
+		return
+	}
+
+	// d = mant << (exp - mantbits)
+	// Next highest floating point number is mant+1 << exp-mantbits.
+	// Our upper bound is halfway between, mant*2+1 << exp-mantbits-1.
+	upper := new(decimal)
+	upper.Assign(mant*2 + 1)
+	upper.Shift(exp - int(flt.mantbits) - 1)
+
+	// d = mant << (exp - mantbits)
+	// Next lowest floating point number is mant-1 << exp-mantbits,
+	// unless mant-1 drops the significant bit and exp is not the minimum exp,
+	// in which case the next lowest is mant*2-1 << exp-mantbits-1.
+	// Either way, call it mantlo << explo-mantbits.
+	// Our lower bound is halfway between, mantlo*2+1 << explo-mantbits-1.
+	var mantlo uint64
+	var explo int
+	if mant > 1<<flt.mantbits || exp == minexp {
+		mantlo = mant - 1
+		explo = exp
+	} else {
+		mantlo = mant*2 - 1
+		explo = exp - 1
+	}
+	lower := new(decimal)
+	lower.Assign(mantlo*2 + 1)
+	lower.Shift(explo - int(flt.mantbits) - 1)
+
+	// The upper and lower bounds are possible outputs only if
+	// the original mantissa is even, so that IEEE round-to-even
+	// would round to the original mantissa and not the neighbors.
+	inclusive := mant%2 == 0
+
+	// As we walk the digits we want to know whether rounding up would fall
+	// within the upper bound. This is tracked by upperdelta:
+	//
+	// If upperdelta == 0, the digits of d and upper are the same so far.
+	//
+	// If upperdelta == 1, we saw a difference of 1 between d and upper on a
+	// previous digit and subsequently only 9s for d and 0s for upper.
+	// (Thus rounding up may fall outside the bound, if it is exclusive.)
+	//
+	// If upperdelta == 2, then the difference is greater than 1
+	// and we know that rounding up falls within the bound.
+	var upperdelta uint8
+
+	// Now we can figure out the minimum number of digits required.
+	// Walk along until d has distinguished itself from upper and lower.
+	for ui := 0; ; ui++ {
+		// lower, d, and upper may have the decimal points at different
+		// places. In this case upper is the longest, so we iterate from
+		// ui==0 and start li and mi at (possibly) -1.
+		mi := ui - upper.dp + d.dp
+		if mi >= d.nd {
+			break
+		}
+		li := ui - upper.dp + lower.dp
+		l := byte('0') // lower digit
+		if li >= 0 && li < lower.nd {
+			l = lower.d[li]
+		}
+		m := byte('0') // middle digit
+		if mi >= 0 {
+			m = d.d[mi]
+		}
+		u := byte('0') // upper digit
+		if ui < upper.nd {
+			u = upper.d[ui]
+		}
+
+		// Okay to round down (truncate) if lower has a different digit
+		// or if lower is inclusive and is exactly the result of rounding
+		// down (i.e., and we have reached the final digit of lower).
+		okdown := l != m || inclusive && li+1 == lower.nd
+
+		switch {
+		case upperdelta == 0 && m+1 < u:
+			// Example:
+			// m = 12345xxx
+			// u = 12347xxx
+			upperdelta = 2
+		case upperdelta == 0 && m != u:
+			// Example:
+			// m = 12345xxx
+			// u = 12346xxx
+			upperdelta = 1
+		case upperdelta == 1 && (m != '9' || u != '0'):
+			// Example:
+			// m = 1234598x
+			// u = 1234600x
+			upperdelta = 2
+		}
+		// Okay to round up if upper has a different digit and either upper
+		// is inclusive or upper is bigger than the result of rounding up.
+		okup := upperdelta > 0 && (inclusive || upperdelta > 1 || ui+1 < upper.nd)
+
+		// If it's okay to do either, then round to the nearest one.
+		// If it's okay to do only one, do it.
+		switch {
+		case okdown && okup:
+			d.Round(mi + 1)
+			return
+		case okdown:
+			d.RoundDown(mi + 1)
+			return
+		case okup:
+			d.RoundUp(mi + 1)
+			return
+		}
+	}
+}
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@ -286,6 +286,9 @@ github.com/redis/go-redis/v9/push
 ## explicit; go 1.24.0
 github.com/rubenv/sql-migrate
 github.com/rubenv/sql-migrate/sqlparse
+# github.com/shopspring/decimal v1.4.0
+## explicit; go 1.10
+github.com/shopspring/decimal
 # github.com/sirupsen/logrus v1.9.3
 ## explicit; go 1.13
 github.com/sirupsen/logrus
--- a/walletapp/config.go
+++ b/walletapp/config.go
@ -2,14 +2,14 @@ package walletapp

 import (
 	"git.gocasts.ir/ebhomengo/niki/adapter/redis"
-	"git.gocasts.ir/ebhomengo/niki/domain/shoppingbasket/repository"
+	"git.gocasts.ir/ebhomengo/niki/domain/wallet/repository/postgres"
 	"git.gocasts.ir/ebhomengo/niki/pkg/httpserver"
 	logger "git.gocasts.ir/ebhomengo/niki/pkg/logger"
 )

 type Config struct {
 	Redis      redis.Config      `koanf:"redis" json:"redis"`
-	Repo       repository.Config `koanf:"repo" json:"repo"`
+	Repo       postgres.Config   `koanf:"repo" json:"repo"`
 	HTTPServer httpserver.Config `koanf:"http_server" json:"http_server"`
 	Logger     logger.Config     `koanf:"logger" json:"logger"`
 }
Author	SHA1	Message	Date
danialasadi	14a941493e	wallet domain finished	2026-05-09 02:33:52 +03:30
danialasadi	27356e028f	ADD \| add AllowUseDBGenericFunc interface to generic funcs constraint & debug sth	2026-05-08 17:37:58 +03:30
danialasadi	9a219730a0	ADD \| general instant queries & debug sth	2026-05-08 16:06:54 +03:30
danialasadi	44bfde3c65	EDIT \| Add & Use General Pagination Func	2026-05-08 04:28:50 +03:30
danialasadi	bc24bcc686	ADD db transaction handler & pagination & implements repository interface	2026-05-08 03:58:56 +03:30