Added structured logging across services and repositories. Updated SQL queries to use parameterized placeholders for better readability and security. Enhanced error handling for external service communication.

111

@@ -0,0 +1,2 @@
+Portainer
+admin - 4c#;=H36$s^J

backend/src/api/routers/transactions.go

@@ -7,6 +7,7 @@ import (
 	"FamilyHub/src/domain"
 	"errors"
 	"io"
+	"log"
 	"net/http"
 	"strconv"
 	"strings"
@@ -73,13 +74,13 @@ func (router *TransactionsRouter) Create(c *gin.Context) {
 		c.JSON(http.StatusBadRequest, dto.ErrorResponse{Message: err.Error()})
 		return
 	}
-
+	log.Printf("%+v\n", input)
 	transaction, err := router.creationService.Create(c.Request.Context(), input)
 	if err != nil {
 		handleTransactionError(c, err)
 		return
 	}
-
+	log.Printf("%+v\n", transaction)
 	c.JSON(http.StatusCreated, dto.TransactionToResponse(transaction))
 }
 

backend/src/api/services/receipts.go

@@ -4,8 +4,10 @@ import (
 	"FamilyHub/src/domain"
 	"FamilyHub/src/integrations/receiptProvider"
 	"FamilyHub/src/repositories"
+	"FamilyHub/src/utils"
 	"context"
 	"fmt"
+	"log"
 	"strings"
 )
 
@@ -35,18 +37,23 @@ func (s *receiptService) AddReceipt(
 	ctx context.Context,
 	req domain.AddReceiptRequest,
 ) (*domain.Receipt, error) {
+	log.Printf("receipt add request: payload=%s", utils.ToLogJSON(req))
+
 	receipt, err := s.provider.GetReceipt(ctx, req.Date, req.Number)
 	if err != nil {
+		log.Printf("receipt add failed: err=%v payload=%s", err, utils.ToLogJSON(req))
 		return nil, err
 	}
 
 	receiptID, err := s.repo.Create(ctx, receipt)
 	if err != nil {
+		log.Printf("receipt persist failed: err=%v receipt=%s", err, utils.ToLogJSON(receipt))
 		return nil, err
 	}
 	receipt.ID = int(receiptID)
 
 	if !s.shouldCreateTransaction(req) {
+		log.Printf("receipt add response: payload=%s", utils.ToLogJSON(receipt))
 		return receipt, nil
 	}
 
@@ -59,6 +66,7 @@ func (s *receiptService) AddReceipt(
 	}
 
 	receipt.TransactionID = &transaction.ID
+	log.Printf("receipt add response: payload=%s", utils.ToLogJSON(receipt))
 	return receipt, nil
 }
 
@@ -94,11 +102,14 @@ func (s *receiptService) createTransactionForReceipt(
 		CreatedBy:   *req.CreatedBy,
 		ReceiptID:   &receiptID,
 	}
-
+	log.Printf("%+v\n", transaction)
+	log.Printf("receipt transaction create request: payload=%s", utils.ToLogJSON(transaction))
 	if err := s.transactionRepo.Create(ctx, transaction); err != nil {
+		log.Printf("receipt transaction create failed: err=%v payload=%s", err, utils.ToLogJSON(transaction))
 		return nil, err
 	}
 
+	log.Printf("receipt transaction create response: payload=%s", utils.ToLogJSON(transaction))
 	return transaction, nil
 }
 

backend/src/api/services/transactions.go

@@ -3,10 +3,12 @@ package services
 import (
 	"FamilyHub/src/domain"
 	"FamilyHub/src/repositories"
+	"FamilyHub/src/utils"
 	"context"
 	"database/sql"
 	"errors"
 	"fmt"
+	"log"
 	"strings"
 )
 
@@ -38,7 +40,10 @@ var (
 )
 
 func (s *transactionService) Create(ctx context.Context, req domain.CreateTransactionRequest) (*domain.Transaction, error) {
+	log.Printf("transaction create request: payload=%s", utils.ToLogJSON(req))
+
 	if strings.TrimSpace(req.Type) == "" || strings.TrimSpace(req.Category) == "" {
+		log.Printf("transaction create failed: err=%v payload=%s", ErrInvalidTransaction, utils.ToLogJSON(req))
 		return nil, ErrInvalidTransaction
 	}
 
@@ -55,8 +60,10 @@ func (s *transactionService) Create(ctx context.Context, req domain.CreateTransa
 
 	if err := s.repo.Create(ctx, transaction); err != nil {
 		if errors.Is(err, repositories.ErrReceiptNotFound) {
+			log.Printf("transaction create failed: err=%v payload=%s", ErrReceiptNotFound, utils.ToLogJSON(req))
 			return nil, ErrReceiptNotFound
 		}
+		log.Printf("transaction create failed: err=%v payload=%s", err, utils.ToLogJSON(req))
 		return nil, err
 	}
 
@@ -72,6 +79,7 @@ func (s *transactionService) Create(ctx context.Context, req domain.CreateTransa
 		})
 	}
 
+	log.Printf("transaction create response: payload=%s", utils.ToLogJSON(transaction))
 	return transaction, nil
 }
 

backend/src/integrations/familyHub/apiClient.go

@@ -3,11 +3,14 @@ package familyHub
 import (
 	"FamilyHub/src/config"
 	"FamilyHub/src/domain"
+	"FamilyHub/src/utils"
 	"bytes"
 	"context"
 	"encoding/json"
 	"errors"
 	"fmt"
+	"io"
+	"log"
 	"net/http"
 	"strconv"
 	"time"
@@ -63,14 +66,13 @@ func (c *HTTPClient) SendReceipt(ctx context.Context, payload domain.AddReceiptR
 
 	req.Header.Set("Content-Type", "application/json")
 
-	resp, err := c.client.Do(req)
+	responseBody, statusCode, err := c.doRequest(req, "familyhub_api.transactions.create", body)
 	if err != nil {
 		return err
 	}
-	defer resp.Body.Close()
 
-	if resp.StatusCode >= 300 {
+	if statusCode >= 300 {
-		return fmt.Errorf("api error: status %d", resp.StatusCode)
+		return fmt.Errorf("api error: status %d body %s", statusCode, utils.TruncateForLog(string(responseBody), 512))
 	}
 
 	return nil
@@ -120,14 +122,13 @@ func (c *HTTPClient) RegisterUser(ctx context.Context, payload domain.CreateUser
 
 	req.Header.Set("Content-Type", "application/json")
 
-	resp, err := c.client.Do(req)
+	responseBody, statusCode, err := c.doRequest(req, "familyhub_api.users.create", body)
 	if err != nil {
 		return err
 	}
-	defer resp.Body.Close()
 
-	if resp.StatusCode >= 300 {
+	if statusCode >= 300 {
-		return fmt.Errorf("api error: status %d", resp.StatusCode)
+		return fmt.Errorf("api error: status %d body %s", statusCode, utils.TruncateForLog(string(responseBody), 512))
 	}
 
 	return nil
@@ -144,22 +145,21 @@ func (c *HTTPClient) GetUserByTelegramID(ctx context.Context, telegramID int64)
 		return nil, err
 	}
 
-	resp, err := c.client.Do(req)
+	responseBody, statusCode, err := c.doRequest(req, "familyhub_api.users.by_telegram", nil)
 	if err != nil {
 		return nil, err
 	}
-	defer resp.Body.Close()
 
-	if resp.StatusCode == http.StatusNotFound {
+	if statusCode == http.StatusNotFound {
 		return nil, errUserNotFound
 	}
 
-	if resp.StatusCode >= 300 {
+	if statusCode >= 300 {
-		return nil, fmt.Errorf("api error: status %d", resp.StatusCode)
+		return nil, fmt.Errorf("api error: status %d body %s", statusCode, utils.TruncateForLog(string(responseBody), 512))
 	}
 
 	var user domain.UserResponse
-	if err := json.NewDecoder(resp.Body).Decode(&user); err != nil {
+	if err := json.Unmarshal(responseBody, &user); err != nil {
 		return nil, err
 	}
 
@@ -184,15 +184,48 @@ func (c *HTTPClient) CreateFamily(ctx context.Context, payload domain.CreateFami
 
 	req.Header.Set("Content-Type", "application/json")
 
-	resp, err := c.client.Do(req)
+	responseBody, statusCode, err := c.doRequest(req, "familyhub_api.families.create", body)
 	if err != nil {
 		return err
 	}
-	defer resp.Body.Close()
 
-	if resp.StatusCode >= 300 {
+	if statusCode >= 300 {
-		return fmt.Errorf("api error: status %d", resp.StatusCode)
+		return fmt.Errorf("api error: status %d body %s", statusCode, utils.TruncateForLog(string(responseBody), 512))
 	}
 
 	return nil
 }
+
+func (c *HTTPClient) doRequest(req *http.Request, service string, requestBody []byte) ([]byte, int, error) {
+	log.Printf(
+		"external request: service=%s method=%s url=%s body=%q",
+		service,
+		req.Method,
+		req.URL.String(),
+		utils.TruncateForLog(string(requestBody), utils.DefaultLogValueLimit),
+	)
+
+	resp, err := c.client.Do(req)
+	if err != nil {
+		log.Printf("external response: service=%s method=%s url=%s err=%v", service, req.Method, req.URL.String(), err)
+		return nil, 0, err
+	}
+	defer resp.Body.Close()
+
+	responseBody, readErr := io.ReadAll(resp.Body)
+	if readErr != nil {
+		log.Printf("external response: service=%s method=%s url=%s status=%d read_err=%v", service, req.Method, req.URL.String(), resp.StatusCode, readErr)
+		return nil, resp.StatusCode, readErr
+	}
+
+	log.Printf(
+		"external response: service=%s method=%s url=%s status=%d body=%q",
+		service,
+		req.Method,
+		req.URL.String(),
+		resp.StatusCode,
+		utils.TruncateForLog(string(responseBody), utils.DefaultLogValueLimit),
+	)
+
+	return responseBody, resp.StatusCode, nil
+}

backend/src/integrations/familyHub/botClient.go

@@ -2,9 +2,14 @@ package familyHub
 
 import (
 	"FamilyHub/src/config"
+	"FamilyHub/src/utils"
 	"context"
+	"fmt"
+	"io"
+	"log"
 	"net/http"
 	"strconv"
+	"strings"
 	"time"
 )
 
@@ -18,19 +23,42 @@ func NewBotClient(config config.Config) (*HTTPClient, error) {
 }
 
 func (c *HTTPClient) SendMessage(ctx context.Context, chatId int64, message string) error {
+	url := c.config.TelegramApi + "/bot" + c.config.BotToken + "/sendMessage?chat_id=" + strconv.FormatInt(chatId, 10) + "&text=" + message
 	req, err := http.NewRequestWithContext(
 		ctx,
 		http.MethodGet,
-		c.config.TelegramApi+"/bot"+c.config.BotToken+"/sendMessage?chat_id="+strconv.FormatInt(chatId, 10)+"&text="+message,
+		url,
 		nil,
 	)
 	if err != nil {
 		return err
 	}
+	logURL := strings.ReplaceAll(req.URL.String(), c.config.BotToken, "***")
+	log.Printf(
+		"external request: service=telegram_bot.send_message method=%s url=%s body=%q",
+		http.MethodGet,
+		logURL,
+		utils.TruncateForLog(fmt.Sprintf("chat_id=%d&text=%s", chatId, message), utils.DefaultLogValueLimit),
+	)
 	resp, err := c.client.Do(req)
 	if err != nil {
+		log.Printf("external response: service=telegram_bot.send_message method=%s url=%s err=%v", http.MethodGet, logURL, err)
 		return err
 	}
 	defer resp.Body.Close()
+
+	responseBody, readErr := io.ReadAll(resp.Body)
+	if readErr != nil {
+		log.Printf("external response: service=telegram_bot.send_message method=%s url=%s status=%d read_err=%v", http.MethodGet, logURL, resp.StatusCode, readErr)
+		return readErr
+	}
+
+	log.Printf(
+		"external response: service=telegram_bot.send_message method=%s url=%s status=%d body=%q",
+		http.MethodGet,
+		logURL,
+		resp.StatusCode,
+		utils.TruncateForLog(string(responseBody), utils.DefaultLogValueLimit),
+	)
 	return nil
 }

backend/src/integrations/ocr/google.go

@@ -1,9 +1,11 @@
 package ocr
 
 import (
+	"FamilyHub/src/utils"
 	"bytes"
 	"context"
 	"fmt"
+	"log"
 
 	vision "cloud.google.com/go/vision/apiv1"
 )
@@ -30,19 +32,29 @@ func (g *GoogleOCR) Close() error {
 }
 
 func (g *GoogleOCR) Recognize(ctx context.Context, image []byte) (string, error) {
+	log.Printf("external request: service=google_ocr.detect_text image_size_bytes=%d", len(image))
+
 	img, err := vision.NewImageFromReader(bytes.NewReader(image))
 	if err != nil {
+		log.Printf("external response: service=google_ocr.detect_text err=%v", err)
 		return "", fmt.Errorf("load image: %w", err)
 	}
 
 	annotations, err := g.client.DetectTexts(ctx, img, nil, 1)
 	if err != nil {
+		log.Printf("external response: service=google_ocr.detect_text err=%v", err)
 		return "", fmt.Errorf("detect text: %w", err)
 	}
 
 	if len(annotations) == 0 {
+		log.Printf("external response: service=google_ocr.detect_text result=%q", "")
 		return "", nil
 	}
 
+	log.Printf(
+		"external response: service=google_ocr.detect_text result=%q annotations=%d",
+		utils.TruncateForLog(annotations[0].Description, utils.DefaultLogValueLimit),
+		len(annotations),
+	)
 	return annotations[0].Description, nil
 }

backend/src/integrations/receiptProvider/receipt_provider.go

@@ -64,6 +64,14 @@ func (s *receiptProvider) GetReceipt(
 	var receipt domain.Receipt
 
 	body, contentType := buildMultipartBody(date, number)
+	requestBody := body.String()
+	log.Printf(
+		"external request: service=receipt_provider method=%s url=%s content_type=%s body=%q",
+		http.MethodPost,
+		url,
+		contentType,
+		utils.TruncateForLog(requestBody, utils.DefaultLogValueLimit),
+	)
 	httpReq, err := http.NewRequestWithContext(
 		ctx,
 		http.MethodPost,
@@ -79,18 +87,27 @@ func (s *receiptProvider) GetReceipt(
 
 	resp, err := s.client.Do(httpReq)
 	if err != nil {
-		log.Println(err.Error())
+		log.Printf("external response: service=receipt_provider method=%s url=%s err=%v", http.MethodPost, url, err)
 		return nil, err
 	}
 	defer resp.Body.Close()
 
-	if resp.StatusCode != http.StatusOK {
+	responseBody, readErr := io.ReadAll(resp.Body)
-		responseBody, readErr := io.ReadAll(io.LimitReader(resp.Body, 4096))
 	if readErr != nil {
-			log.Printf("failed to read external service error body: %v", readErr)
+		log.Printf("failed to read external service response body: %v", readErr)
+		return nil, readErr
 	}
+
 	bodyText := strings.TrimSpace(string(responseBody))
-		log.Printf("external service returned %d body=%q", resp.StatusCode, bodyText)
+	log.Printf(
+		"external response: service=receipt_provider method=%s url=%s status=%d body=%q",
+		http.MethodPost,
+		url,
+		resp.StatusCode,
+		utils.TruncateForLog(bodyText, utils.DefaultLogValueLimit),
+	)
+
+	if resp.StatusCode != http.StatusOK {
 		return nil, &ExternalServiceError{
 			StatusCode: resp.StatusCode,
 			Body:       bodyText,
@@ -100,8 +117,8 @@ func (s *receiptProvider) GetReceipt(
 	var raw struct {
 		Message map[string]interface{} `json:"message"`
 	}
-	if err := json.NewDecoder(resp.Body).Decode(&raw); err != nil {
+	if err := json.Unmarshal(responseBody, &raw); err != nil {
-		log.Printf("external service returned %s\n", err.Error())
+		log.Printf("external service returned invalid json: %v", err)
 		return nil, err
 	}
 
@@ -112,6 +129,7 @@ func (s *receiptProvider) GetReceipt(
 	}
 
 	if receipt.IssuedAtRaw == "" {
+		log.Printf("external response parse failed: service=receipt_provider err=%v date=%s number=%s", ErrReceiptNotFound, date, number)
 		return nil, ErrReceiptNotFound
 	}
 

backend/src/repositories/receipts.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"database/sql"
 	"errors"
+	"log"
 
 	"FamilyHub/src/domain"
 )
@@ -25,29 +26,63 @@ func NewReceiptsSQLRepository(db *sql.DB) *ReceiptsSQLRepository {
 }
 
 func (r *ReceiptsSQLRepository) Create(ctx context.Context, receipt *domain.Receipt) (int64, error) {
+	log.Printf("%+v\n", receipt)
 
 	tx, err := r.db.BeginTx(ctx, nil)
 	if err != nil {
 		return 0, err
 	}
 	defer tx.Rollback()
+
 	if receipt.ReceiptNumber != receipt.UI {
 		receipt.ReceiptNumber = receipt.UI
 	}
-	res, err := tx.ExecContext(ctx, `
+
+	log.Println("First query")
+
+	query := `
 	INSERT INTO receipts (
-		transaction_id, receipt_number, ui, status, issued_at,
+		transaction_id,
-		total_amount, payment_amount, cash_amount,
+		receipt_number,
-		another_amount, clearing_amount, margin,
+		ui,
-		currency, payment_type,
+		status,
-		cashbox_number, cashier,
+		issued_at,
-		name_spd, name_to, name_np, type_np,
+		total_amount,
-		street_to, house_to,
+		payment_amount,
-		kod_soato, oblast_soato, rayon_soato, selsovet_soato,
+		cash_amount,
-		doc_num, skno_number, unp,
+		another_amount,
+		clearing_amount,
+		margin,
+		currency,
+		payment_type,
+		cashbox_number,
+		cashier,
+		name_spd,
+		name_to,
+		name_np,
+		type_np,
+		street_to,
+		house_to,
+		kod_soato,
+		oblast_soato,
+		rayon_soato,
+		selsovet_soato,
+		doc_num,
+		skno_number,
+		unp,
 		success
-	) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+	)
-	`,
+	VALUES (
+		$1, $2, $3, $4, $5,
+		$6, $7, $8, $9, $10,
+		$11, $12, $13, $14, $15,
+		$16, $17, $18, $19, $20,
+		$21, $22, $23, $24, $25,
+		$26, $27, $28, $29
+	)
+	RETURNING id;
+	`
+	args := []any{
 		receipt.TransactionID,
 		receipt.ReceiptNumber,
 		receipt.UI,
@@ -85,16 +120,19 @@ func (r *ReceiptsSQLRepository) Create(ctx context.Context, receipt *domain.Rece
 		receipt.UNP,
 
 		receipt.Success,
-	)
+	}
 
+	log.Printf("SQL: %s", query)
+	log.Printf("ARGS: %+v", args)
+
+	var receiptID int64
+
+	err = tx.QueryRowContext(ctx, query, args...).Scan(&receiptID)
 	if err != nil {
 		return 0, err
 	}
 
-	receiptID, err := res.LastInsertId()
+	log.Println("Second query")
-	if err != nil {
-		return 0, err
-	}
 
 	stmt, err := tx.PrepareContext(ctx, `
 		INSERT INTO positions (
@@ -109,7 +147,11 @@ func (r *ReceiptsSQLRepository) Create(ctx context.Context, receipt *domain.Rece
 			tag,
 			marking_code,
 			ukz_code
-		) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+		)
+		VALUES (
+			$1, $2, $3, $4, $5,
+			$6, $7, $8, $9, $10, $11
+		)
 	`)
 	if err != nil {
 		return 0, err
@@ -117,7 +159,8 @@ func (r *ReceiptsSQLRepository) Create(ctx context.Context, receipt *domain.Rece
 	defer stmt.Close()
 
 	for _, p := range receipt.Positions {
-		_, err = stmt.ExecContext(ctx,
+		_, err = stmt.ExecContext(
+			ctx,
 			receiptID,
 			p.SectionNumber,
 			p.GTINCode,
@@ -135,7 +178,11 @@ func (r *ReceiptsSQLRepository) Create(ctx context.Context, receipt *domain.Rece
 		}
 	}
 
-	return receiptID, tx.Commit()
+	if err = tx.Commit(); err != nil {
+		return 0, err
+	}
+
+	return receiptID, nil
 }
 
 func (r *ReceiptsSQLRepository) GetByID(ctx context.Context, id int64) (*domain.Receipt, error) {
@@ -157,7 +204,7 @@ func (r *ReceiptsSQLRepository) GetByID(ctx context.Context, id int64) (*domain.
 		doc_num, skno_number, unp,
 		success
 	FROM receipts
-	WHERE id = ?
+	WHERE id = $1
 `, id).Scan(
 		&receipt.ID,
 		&receipt.TransactionID,
@@ -213,7 +260,7 @@ func (r *ReceiptsSQLRepository) GetByID(ctx context.Context, id int64) (*domain.
 			product_count, amount,
 			discount, surcharge,
 			tag, marking_code, ukz_code
-		FROM positions WHERE receipt_id = ?
+		FROM positions WHERE receipt_id = $1
 	`, id)
 	if err != nil {
 		return nil, err
@@ -247,10 +294,16 @@ func (r *ReceiptsSQLRepository) GetByID(ctx context.Context, id int64) (*domain.
 func (r *ReceiptsSQLRepository) GetAll(ctx context.Context, limit, offset int) ([]*domain.Receipt, error) {
 
 	rows, err := r.db.QueryContext(ctx, `
-		SELECT id, transaction_id, receipt_number, issued_at, total_amount, currency
+		SELECT
+			id,
+			transaction_id,
+			receipt_number,
+			issued_at,
+			total_amount,
+			currency
 		FROM receipts
 		ORDER BY issued_at DESC
-		LIMIT ? OFFSET ?
+		LIMIT $1 OFFSET $2
 	`, limit, offset)
 	if err != nil {
 		return nil, err
@@ -261,6 +314,7 @@ func (r *ReceiptsSQLRepository) GetAll(ctx context.Context, limit, offset int) (
 
 	for rows.Next() {
 		var rct domain.Receipt
+
 		if err := rows.Scan(
 			&rct.ID,
 			&rct.TransactionID,
@@ -271,9 +325,14 @@ func (r *ReceiptsSQLRepository) GetAll(ctx context.Context, limit, offset int) (
 		); err != nil {
 			return nil, err
 		}
+
 		receipts = append(receipts, &rct)
 	}
 
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
 	return receipts, nil
 }
 
@@ -287,11 +346,11 @@ func (r *ReceiptsSQLRepository) Update(ctx context.Context, receipt *domain.Rece
 
 	_, err = tx.ExecContext(ctx, `
 		UPDATE receipts SET
-			transaction_id = ?,
+			transaction_id = $1,
-			issued_at = ?,
+			issued_at = $2,
-			total_amount = ?,
+			total_amount = $3,
-			currency = ?
+			currency = $4
-		WHERE id = ?
+		WHERE id = $5
 	`,
 		receipt.TransactionID,
 		receipt.IssuedAt,
@@ -303,7 +362,7 @@ func (r *ReceiptsSQLRepository) Update(ctx context.Context, receipt *domain.Rece
 		return err
 	}
 
-	_, err = tx.ExecContext(ctx, `DELETE FROM positions WHERE receipt_id = ?`, receipt.ID)
+	_, err = tx.ExecContext(ctx, `DELETE FROM positions WHERE receipt_id = $1`, receipt.ID)
 	if err != nil {
 		return err
 	}
@@ -312,7 +371,7 @@ func (r *ReceiptsSQLRepository) Update(ctx context.Context, receipt *domain.Rece
 		_, err = tx.ExecContext(ctx, `
 			INSERT INTO positions (
 				receipt_id, product_name, product_count, amount
-			) VALUES (?, ?, ?, ?)
+			) VALUES ($1, $2, $3, $4)
 		`, receipt.ID, p.ProductName, p.ProductCount, p.Amount)
 		if err != nil {
 			return err
@@ -324,7 +383,7 @@ func (r *ReceiptsSQLRepository) Update(ctx context.Context, receipt *domain.Rece
 
 func (r *ReceiptsSQLRepository) Delete(ctx context.Context, id int64) error {
 	_, err := r.db.ExecContext(ctx,
-		`DELETE FROM receipts WHERE id = ?`,
+		`DELETE FROM receipts WHERE id = $1`,
 		id,
 	)
 	return err

backend/src/utils/logging.go

@@ -0,0 +1,29 @@
+package utils
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+const DefaultLogValueLimit = 4096
+
+func ToLogJSON(value any) string {
+	if value == nil {
+		return "null"
+	}
+
+	data, err := json.Marshal(value)
+	if err != nil {
+		return TruncateForLog(fmt.Sprintf("%+v", value), DefaultLogValueLimit)
+	}
+
+	return TruncateForLog(string(data), DefaultLogValueLimit)
+}
+
+func TruncateForLog(value string, limit int) string {
+	if limit <= 0 || len(value) <= limit {
+		return value
+	}
+
+	return value[:limit] + "...(truncated)"
+}

resp.json

@@ -0,0 +1,32 @@
+{
+  "id": 0,
+  "transaction_id": null,
+  "STATUS": 1,
+  "another_amount": 0,
+  "cash_amount": 0,
+  "cashbox_number": 119091676,
+  "cashier": "Старший кассир КСО",
+  "clearing_amount": 190.06,
+  "currency": "BYN",
+  "doc_num": "39972",
+  "house_to": "11",
+  "kod_soato": "5000000000",
+  "margin": 0,
+  "name_np": "Минск",
+  "name_spd": "Общество с ограниченной ответственностью \"ГРИНрозница\"",
+  "name_to": "Магазин \"ГРИН-5\"",
+  "oblast_soato": null,
+  "rayon_soato": null,
+  "selsovet_soato": null,
+  "payment_amount": 190.06,
+  "payment_type": 1,
+  "receipt_number": "CBB580D6268681CB071931DC",
+  "skno_number": "AVQ24170126963",
+  "street_to": "УЛ. ПЕТРА МСТИСЛАВЦА",
+  "success": "A check is correct",
+  "total_amount": 190.06,
+  "type_np": "г.",
+  "ui": "CBB580D6268681CB071931DC",
+  "unp": "191634233",
+  "issued_at": "09/11/2025, 18:08:31"
+}