diff --git a/main.go b/main.go
new file mode 100644
index 0000000..092e0d8
--- /dev/null
+++ b/main.go
@@ -0,0 +1,82 @@
+//go:build !Develop
+
+package main
+
+import (
+	"AngkorWalletScanning/model"
+	"AngkorWalletScanning/src"
+	"AngkorWalletScanning/umlog"
+	"AngkorWalletScanning/umsql"
+	"fmt"
+	"os"
+	"time"
+)
+
+var (
+	MODE      string = "" // Release, Info, Debug
+	DB_USER   string = ""
+	DB_PASS   string = ""
+	DB_HOST   string = ""
+	DB_PORT   string = ""
+	DB_NAME   string = ""
+	KEY       string = ""
+	CODE_STRC model.CodeStrc
+)
+
+func main() {
+	var header model.Header
+	if len(os.Args) != 1 {
+		DB_USER = os.Args[1]
+		DB_PASS = os.Args[2]
+		DB_HOST = os.Args[3]
+		DB_PORT = os.Args[4]
+		DB_NAME = os.Args[5]
+		KEY = os.Args[6]
+		MODE = os.Args[7]
+		header.AppKey = os.Args[8]
+		header.SecretKey = os.Args[9]
+	}
+
+	err := umlog.Init("/var/tmp/AnkWalletScanning.log", "7208765670:AAEN35cnQPeoDho33QvrchhVzuwnUcyDZdk", CODE_STRC.MESSAGE_ID)
+	if err != nil {
+		fmt.Println("umlog.Init Error : " + err.Error())
+	}
+
+	if MODE == "Release" {
+		umlog.SetLevel("E")
+	} else if MODE == "Info" {
+		umlog.SetLevel("I")
+	} else {
+		umlog.SetLevel("D")
+	}
+
+	walletDB := umsql.DbConnect(DB_HOST, DB_PORT, DB_USER, DB_PASS, DB_NAME)
+	defer umsql.DbDisconnect(walletDB)
+	_, CODE_STRC = src.GetCodeInfo(walletDB, KEY)
+	umlog.Info("main\nCode Info Loaded: %+v", CODE_STRC)
+
+	// 트랜잭션 모니터링 시작 (백그라운드 고루틴)
+	// CYBX 토큰 컨트랙트 주소는 환경에 맞게 설정 필요
+	var contractAddress string
+	contractAddress = CODE_STRC.CYBX_MAINNET
+
+	// 백그라운드에서 트랜잭션 모니터링 시작
+	// go src.StartTransactionMonitor(
+	// src.StartTransactionMonitor(
+	// 	walletDB,        // DB 연결
+	// 	contractAddress, // CYBX 토큰 컨트랙트 주소
+	// 	10*time.Second,  // 10초마다 체크
+	// 	40,              // 한 번에 40명 체크
+	// 	NETTYPE,         // MAINNET 또는 TESTNET
+	// 	CODE_STRC,       // 코드 정보
+	// )
+
+	src.StartTransactionMonitorAlchemy(
+		walletDB,
+		header,
+		contractAddress,
+		3*time.Second,
+		15,
+		CODE_STRC)
+
+}
diff --git a/model/code.go b/model/code.go
new file mode 100644
index 0000000..4d9d999
--- /dev/null
+++ b/model/code.go
@@ -0,0 +1,16 @@
+package model
+
+type CodeStrc struct {
+	CIPHERKEY        string
+	CIPHERIVKEY      string
+	MESSAGE_TOKEN    string
+	MESSAGE_ID       string
+	SENDBIRD_KEY     string
+	SENDBIRD_VERSION string
+	SENDBIRD_TOKEN   string
+	ETHERSCAN_TOKEN  string
+	CYBX_MAINNET     string
+	CYBX_TESTNET     string
+	ALCHEMY_MAINNET  string
+	ALCHEMY_TESTNET  string
+}
diff --git a/model/common.go b/model/common.go
new file mode 100644
index 0000000..f181275
--- /dev/null
+++ b/model/common.go
@@ -0,0 +1,34 @@
+package model
+
+type Header struct {
+	AppKey    string `form:"appKey" json:"appKey" example:"adpsofimerpifgarpo8rt320"`
+	SecretKey string `form:"secretKey" json:"secretKey" example:"sdfjlsdkfjsldkfjlsdkjflsdkjflsdkjflsdkj"`
+}
+
+type ServerUrlStrc struct {
+	AAuthUrl string `form:"aauthUrl" json:"aauthUrl" example:"http://aauth.angkorlife.com"`
+	LifeUrl  string `form:"lifeUrl" json:"lifeUrl" example:"http://life.angkorlife.com"`
+	WattUrl  string `form:"wattUrl" json:"wattUrl" example:"http://watt.angkorlife.com"`
+}
+
+type UserInfoStrc struct {
+	AngkorId     string `form:"angkorId" json:"angkorId" example:"akDEvQ1693297580"`
+	UserId       string `form:"userId" json:"userId" example:"user01"`
+	UserAngkorId string `form:"userAngkorId" json:"userAngkorId" example:"alice"`
+	PhoneNumber  string `form:"phoneNumber" json:"phoneNumber" example:"8551012345678"`
+	Email        string `form:"email" json:"email" example:"user01@example.com"`
+}
+
+type AuthInitStrc struct {
+	GrantType    string `form:"grantType" json:"grantType" example:"session"`
+	UserAngkorId string `form:"userAngkorId" json:"userAngkorId" example:"alice"`
+}
+
+type AuthKeyStrc struct {
+	TokenType string `json:"tokenType" example:"bearer"`
+	AuthKey   string `json:"authKey" example:"adpsofimerpifgarpo8rt320"`
+}
+
+type WattInfoStrc struct {
+	WattAmount string `form:"wattAmount" json:"wattAmount" example:"0.0"`
+}
diff --git a/model/default.go b/model/default.go
new file mode 100644
index 0000000..6c02554
--- /dev/null
+++ b/model/default.go
@@ -0,0 +1,28 @@
+package model
+
+type RequestDefaultStrc struct {
+	GrantType string `form:"grantType" json:"grantType" example:"session"`
+	AngkorId  string `form:"angkorid" json:"angkorid" example:"ak123214"`
+}
+
+type ResponseDefaultModel struct {
+	Code    int    `json:"code" example:"200"`
+	Message string `json:"message" example:"success"`
+}
+
+type DefaultErrorModel struct {
+	Code    int    `json:"code" example:"400"`
+	Message string `json:"message" example:"message"`
+}
+
+type ApplicationInfo struct {
+	AppId                  string `json:"appId" example:"11"`
+	ApplicationName        string `json:"appName" example:"angkorlife"`
+	ApplicationCompany     string `json:"appCompany" example:"digital angkor"`
+	ApplicationIcon        string `json:"appIcon" example:"https://icon.angkorlifes.com/images/angkorlife.jpg"`
+	ApplicationConsent     string `json:"appConsent" example:"127"`
+	ApplicationCallbackUrl string `json:"appCallback" example:"https://callback.angkorlifes.com/receive"`
+	ServiceCategory        string `json:"serviceCategory" example:"game"`
+	AppleBundleIDs         string `json:"appleBundleIDs" example:"com.angkorlifes"`
+	AndroidPackageName     string `json:"androidPackageName" example:"com.angkorlifes"`
+}
diff --git a/src/alchemy.go b/src/alchemy.go
new file mode 100644
index 0000000..835e6a1
--- /dev/null
+++ b/src/alchemy.go
@@ -0,0 +1,693 @@
+package src
+
+import (
+	"AngkorWalletScanning/model"
+	"AngkorWalletScanning/umlog"
+	"AngkorWalletScanning/umsql"
+	"bytes"
+	"context"
+	"crypto/tls"
+	"database/sql"
+	"encoding/json"
+	"fmt"
+	"io"
+	"math/big"
+	"net"
+	"net/http"
+	"net/url"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+
+	"golang.org/x/time/rate"
+)
+
+// Alchemy API Rate Limiter (무료 티어: 500 CU/s, eth_getLogs=75 CU → 약 6.67 req/s)
+var alchemyApiLimiter = rate.NewLimiter(rate.Limit(6.5), 7)
+
+// HTTP 클라이언트 초기화 함수
+func initAlchemyHTTPClient() *http.Client {
+	transport := &http.Transport{
+		Dial: (&net.Dialer{
+			Timeout:   30 * time.Second, // 10초 → 30초로 증가
+			KeepAlive: 30 * time.Second,
+			Resolver: &net.Resolver{
+				PreferGo: false, // 시스템 DNS resolver 사용
+			},
+		}).Dial,
+		TLSHandshakeTimeout:   15 * time.Second, // 10초 → 15초로 증가
+		ResponseHeaderTimeout: 15 * time.Second, // 10초 → 15초로 증가
+		ExpectContinueTimeout: 1 * time.Second,
+		MaxIdleConns:          100,
+		MaxIdleConnsPerHost:   10,
+		IdleConnTimeout:       90 * time.Second,
+		TLSClientConfig: &tls.Config{
+			InsecureSkipVerify: false,
+		},
+		DisableKeepAlives: false,
+		// DNS 캐시 시간 연장
+		MaxConnsPerHost: 10,
+	}
+
+	// 환경 변수 또는 시스템 프록시 사용
+	if proxyURL := os.Getenv("HTTPS_PROXY"); proxyURL != "" {
+		umlog.Debug("[Alchemy] Using proxy from HTTPS_PROXY: %s\n", proxyURL)
+		if proxy, err := url.Parse(proxyURL); err == nil {
+			transport.Proxy = http.ProxyURL(proxy)
+		}
+	} else if proxyURL := os.Getenv("HTTP_PROXY"); proxyURL != "" {
+		umlog.Debug("[Alchemy] Using proxy from HTTP_PROXY: %s\n", proxyURL)
+		if proxy, err := url.Parse(proxyURL); err == nil {
+			transport.Proxy = http.ProxyURL(proxy)
+		}
+	} else {
+		// 시스템 기본 프록시 사용
+		transport.Proxy = http.ProxyFromEnvironment
+	}
+
+	return &http.Client{
+		Timeout:   60 * time.Second, // 30초 → 60초로 증가 (전체 요청 타임아웃)
+		Transport: transport,
+	}
+}
+
+// HTTP 클라이언트 (타임아웃 및 연결 설정)
+var alchemyHTTPClient = initAlchemyHTTPClient()
+
+// ERC20 Transfer Event Topic (Transfer 이벤트 시그니처 해시)
+const transferEventTopic = "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"
+
+// Alchemy JSON-RPC Request/Response Structures
+type AlchemyRequest struct {
+	JsonRPC string        `json:"jsonrpc"`
+	Method  string        `json:"method"`
+	Params  []interface{} `json:"params"`
+	ID      int           `json:"id"`
+}
+
+type AlchemyResponse struct {
+	JsonRPC string                 `json:"jsonrpc"`
+	ID      int                    `json:"id"`
+	Result  map[string]interface{} `json:"result"`
+	Error   *AlchemyError          `json:"error,omitempty"`
+}
+
+type AlchemyError struct {
+	Code    int    `json:"code"`
+	Message string `json:"message"`
+}
+
+type AlchemyLog struct {
+	Address          string   `json:"address"`
+	Topics           []string `json:"topics"`
+	Data             string   `json:"data"`
+	BlockNumber      string   `json:"blockNumber"`
+	TransactionHash  string   `json:"transactionHash"`
+	TransactionIndex string   `json:"transactionIndex"`
+	BlockHash        string   `json:"blockHash"`
+	LogIndex         string   `json:"logIndex"`
+	Removed          bool     `json:"removed"`
+}
+
+type AlchemyTransferInfo struct {
+	BlockNumber     int64
+	TransactionHash string
+	From            string
+	To              string
+	Value           string
+	TokenAddress    string
+	Timestamp       int64
+}
+
+/*
+**************************************************************
+
+	desc : Alchemy API를 통해 특정 주소의 ERC20 토큰 Transfer 이벤트 조회
+	parameter
+		- address         : 조회할 지갑 주소
+		- contractAddress : 토큰 컨트랙트 주소 (CYBX)
+		- fromBlock       : 시작 블록 (hex 형식)
+		- toBlock         : 종료 블록 (hex 형식, "latest" 가능)
+		- netType         : 네트워크 타입 ("MAINNET" 또는 "TESTNET")
+		- CODE_STRC       : 설정 정보
+	return
+		- []AlchemyTransferInfo : Transfer 이벤트 목록
+		- error                 : 에러 정보
+
+**************************************************************
+*/
+func getAlchemyTokenTransfers(address string, contractAddress string, fromBlock string, toBlock string, CODE_STRC model.CodeStrc) ([]AlchemyTransferInfo, error) {
+	// 입력 값 검증
+	if address == "" || len(address) < 40 {
+		return nil, fmt.Errorf("invalid wallet address: %s", address)
+	}
+	if contractAddress == "" || len(contractAddress) < 40 {
+		return nil, fmt.Errorf("invalid contract address: %s", contractAddress)
+	}
+
+	// Rate limiter 체크
+	ctx := context.Background()
+	err := alchemyApiLimiter.Wait(ctx)
+	if err != nil {
+		return nil, fmt.Errorf("rate limiter error: %v", err)
+	}
+
+	// eth_getLogs 요청 파라미터 구성
+	// Transfer(address indexed from, address indexed to, uint256 value)
+	// topic[0] = Transfer 이벤트 시그니처
+	// topic[1] = from 주소 (32바이트 패딩)
+	// topic[2] = to 주소 (32바이트 패딩)
+
+	// 입금 트랜잭션 필터: to = 내 주소
+	paddedAddress := "0x" + strings.Repeat("0", 24) + strings.TrimPrefix(strings.ToLower(address), "0x")
+
+	filterParams := map[string]interface{}{
+		"fromBlock": fromBlock,
+		"toBlock":   toBlock,
+		"address":   contractAddress,
+		"topics": []interface{}{
+			transferEventTopic, // Transfer 이벤트
+			nil,                // from (any)
+			paddedAddress,      // to (내 주소)
+		},
+	}
+
+	request := AlchemyRequest{
+		JsonRPC: "2.0",
+		Method:  "eth_getLogs",
+		Params:  []interface{}{filterParams},
+		ID:      1,
+	}
+
+	// JSON 요청 생성
+	requestBody, err := json.Marshal(request)
+	if err != nil {
+		return nil, fmt.Errorf("failed to marshal request: %v", err)
+	}
+
+	// HTTP POST 요청
+	umlog.Debug("Request - Address: %s, From: %s, To: %s", address, fromBlock, toBlock)
+	// umlog.Debug("[getAlchemyTokenTransfers] Padded address (topic[2]): %s\n", paddedAddress)
+	// umlog.Debug("[getAlchemyTokenTransfers] Request body: %s", string(requestBody))
+	req, err := http.NewRequest("POST", CODE_STRC.ALCHEMY_MAINNET, bytes.NewBuffer(requestBody))
+	if err != nil {
+		umlog.Warn("Failed to create request: %v\n", err)
+		return nil, fmt.Errorf("failed to create request: %v", err)
+	}
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("Accept", "application/json")
+
+	// 재시도 로직 (DNS 에러 대응)
+	var resp *http.Response
+	maxRetries := 3
+	for attempt := 1; attempt <= maxRetries; attempt++ {
+		resp, err = alchemyHTTPClient.Do(req)
+		if err == nil {
+			break // 성공
+		}
+
+		// DNS 에러인 경우 재시도
+		if attempt < maxRetries {
+			umlog.Debug("Attempt %d failed: %v, retrying in 2s...", attempt, err)
+			time.Sleep(2 * time.Second)
+			// 요청 바디 재설정 (한 번 읽히면 소진되므로)
+			req.Body = io.NopCloser(bytes.NewBuffer(requestBody))
+			continue
+		}
+
+		// 최종 실패
+		umlog.Warn("HTTP request failed after %d attempts: %v\n", maxRetries, err)
+		return nil, fmt.Errorf("http request failed: %v", err)
+	}
+
+	defer resp.Body.Close()
+	// umlog.Debug("Response status: %d", resp.StatusCode)
+
+	// 응답 읽기
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read response: %v", err)
+	}
+
+	// umlog.Debug("Response body: %s\n", string(body))
+
+	// JSON 파싱
+	var alchemyResp struct {
+		JsonRPC string        `json:"jsonrpc"`
+		ID      int           `json:"id"`
+		Result  []AlchemyLog  `json:"result"`
+		Error   *AlchemyError `json:"error,omitempty"`
+	}
+
+	err = json.Unmarshal(body, &alchemyResp)
+	if err != nil {
+		return nil, fmt.Errorf("failed to parse json: %v", err)
+	}
+
+	// API 에러 체크
+	if alchemyResp.Error != nil {
+		return nil, fmt.Errorf("alchemy api error: %s (code: %d)", alchemyResp.Error.Message, alchemyResp.Error.Code)
+	}
+
+	// Transfer 이벤트 파싱
+	var transfers []AlchemyTransferInfo
+	for _, log := range alchemyResp.Result {
+		if len(log.Topics) < 3 {
+			continue // Invalid Transfer event
+		}
+		umlog.Debug("Log entry: %+v\n", log)
+
+		// from 주소 추출 (topic[1])
+		fromAddr := "0x" + log.Topics[1][26:] // 24개의 0 제거
+
+		// to 주소 추출 (topic[2])
+		toAddr := "0x" + log.Topics[2][26:] // 24개의 0 제거
+
+		// value 추출 (data)
+		value := strings.TrimPrefix(log.Data, "0x")
+
+		// 블록 번호 파싱
+		blockNum := new(big.Int)
+		blockNum.SetString(strings.TrimPrefix(log.BlockNumber, "0x"), 16)
+
+		// 타임스탬프는 별도 조회 필요 (블록 정보에서)
+		timestamp := time.Now().Unix() // 기본값, 필요시 eth_getBlockByNumber 호출
+
+		transfers = append(transfers, AlchemyTransferInfo{
+			BlockNumber:     blockNum.Int64(),
+			TransactionHash: log.TransactionHash,
+			From:            fromAddr,
+			To:              toAddr,
+			Value:           value,
+			TokenAddress:    log.Address,
+			Timestamp:       timestamp,
+		})
+	}
+
+	return transfers, nil
+}
+
+/*
+**************************************************************
+
+	desc : 현재 블록 번호 조회 (Alchemy API)
+	parameter
+		- netType   : 네트워크 타입 ("MAINNET" 또는 "TESTNET")
+		- CODE_STRC : 설정 정보
+	return
+		- int64 : 현재 블록 번호
+
+**************************************************************
+*/
+func getCurrentBlockNumberAlchemy(CODE_STRC model.CodeStrc) int64 {
+	// Alchemy API URL
+	alchemyURL := CODE_STRC.ALCHEMY_MAINNET
+
+	if alchemyURL == "" {
+		umlog.Error("Alchemy API URL not configured")
+		return 0
+	}
+
+	request := AlchemyRequest{
+		JsonRPC: "2.0",
+		Method:  "eth_blockNumber",
+		Params:  []interface{}{},
+		ID:      1,
+	}
+
+	requestBody, err := json.Marshal(request)
+	if err != nil {
+		umlog.Warn("Failed to marshal request: %v\n", err)
+		return 0
+	}
+
+	umlog.Info("Requesting: %s", alchemyURL)
+	req, err := http.NewRequest("POST", alchemyURL, bytes.NewBuffer(requestBody))
+	if err != nil {
+		umlog.Warn("Failed to create request: %v\n", err)
+		return 0
+	}
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("Accept", "application/json")
+
+	resp, err := alchemyHTTPClient.Do(req)
+	if err != nil {
+		umlog.Warn("HTTP request failed: %v\n", err)
+		return 0
+	}
+	defer resp.Body.Close()
+
+	body, _ := io.ReadAll(resp.Body)
+
+	var result struct {
+		JsonRPC string `json:"jsonrpc"`
+		ID      int    `json:"id"`
+		Result  string `json:"result"`
+	}
+
+	json.Unmarshal(body, &result)
+
+	blockNum := new(big.Int)
+	blockNum.SetString(strings.TrimPrefix(result.Result, "0x"), 16)
+
+	return blockNum.Int64()
+}
+
+/*
+**************************************************************
+
+	desc : 해당 트랜잭션에 대해 이미 알림을 보냈는지 확인
+	parameter
+		- walletDBConn : Wallet DB 핸들러
+		- txHash       : 트랜잭션 해시
+	return
+		- bool : 이미 알림 보냈으면 true
+
+**************************************************************
+*/
+func isTransactionNotified(walletDBConn *sql.DB, txHash string) bool {
+	query := "SELECT COUNT(*) FROM ank_wallet_notification WHERE tx_hash = ?"
+
+	var count int
+	res, _, err := umsql.SqlSelect(walletDBConn, query, txHash)
+	if err != nil {
+		umlog.Error("SELECT Error(%s): %s", err.Error(), query)
+		return false
+	}
+	defer res.Close()
+
+	if res.Next() {
+		if err := res.Scan(&count); err != nil {
+			umlog.Error("SCAN Error(%s): %s", err.Error(), query)
+			return false
+		}
+	}
+	return count > 0
+}
+
+/*
+**************************************************************
+
+	desc : 특정 지갑의 입금 트랜잭션 체크 (Alchemy API 사용)
+	parameter
+		- walletDBConn    : Wallet DB 핸들러
+		- userId          : 사용자 ID
+		- walletAddress   : 지갑 주소
+		- contractAddress : CYBX 토큰 컨트랙트 주소
+		- lastCheckTime   : 마지막 체크 시각
+		- netType         : 네트워크 타입
+		- CODE_STRC       : 설정 정보
+	return
+		- int   : 새로 발견된 입금 건수
+		- error : 에러 정보
+
+**************************************************************
+*/
+func checkWalletWithAlchemy(walletDBConn *sql.DB, header model.Header, userId int, walletAddress string, contractAddress string, lastCheckTime time.Time, currentBlock int64, CODE_STRC model.CodeStrc) (int, error) {
+	// 현재 블록은 호출자로부터 받음 (배치 시작 시 한 번만 조회)
+
+	// 입력 값 검증
+	if walletAddress == "" {
+		umlog.Warn("User %d has empty wallet address, skipping\n", userId)
+		return 0, nil
+	}
+	if contractAddress == "" {
+		umlog.Warn("Empty contract address, skipping\n")
+		return 0, fmt.Errorf("contract address is empty")
+	}
+
+	// Alchemy 무료 티어 제한: 한 번에 최대 10 블록만 조회 가능
+	const maxBlockRange = 9 // 10블록이 아니라 9블록 차이 (0부터 9까지 = 10개)
+
+	// 마지막 체크 시각을 블록 번호로 변환 (BSC는 약 3초당 1블록)
+	timeDiff := time.Since(lastCheckTime)
+	blocksToCheck := int64(timeDiff.Seconds() / 3)
+
+	// umlog.Debug("Time diff: %v, Calculated blocks: %d\n", timeDiff, blocksToCheck)
+
+	// Alchemy 무료 티어 제한 적용 (최소 1블록은 체크)
+	if blocksToCheck < 1 {
+		blocksToCheck = 1
+	}
+	if blocksToCheck > maxBlockRange {
+		blocksToCheck = maxBlockRange
+		umlog.Debug("Limiting block range to %d due to Alchemy free tier\n", maxBlockRange)
+	}
+
+	startBlock := currentBlock - blocksToCheck
+	if startBlock < 0 {
+		startBlock = 0
+	}
+
+	// 블록 번호를 hex로 변환
+	fromBlockHex := fmt.Sprintf("0x%x", startBlock)
+	toBlockHex := fmt.Sprintf("0x%x", currentBlock)
+
+	umlog.Debug("Checking blocks %d to %d (range: %d)\n", startBlock, currentBlock, blocksToCheck)
+
+	// Alchemy API로 Transfer 이벤트 조회
+	transfers, err := getAlchemyTokenTransfers(walletAddress, contractAddress, fromBlockHex, toBlockHex, CODE_STRC)
+	if err != nil {
+		umlog.Warn("Failed to get transfers for user %d: %v\n", userId, err)
+		return 0, err
+	}
+
+	newTransactionCount := 0
+
+	for _, transfer := range transfers {
+		umlog.Debug("transfer info: %v\n", transfer)
+
+		// 트랜잭션 시각 체크 (Timestamp 사용)
+		txTime := time.Unix(transfer.Timestamp, 0)
+
+		// 마지막 체크 이후의 트랜잭션만 처리
+		if txTime.Before(lastCheckTime) {
+			continue
+		}
+
+		// 이미 알림 보낸 트랜잭션인지 확인
+		if isTransactionNotified(walletDBConn, transfer.TransactionHash) {
+			continue
+		}
+
+		// 금액 계산 (18 decimals for most tokens, CYBX는 확인 필요)
+		amount := calculateTokenAmountFromHex(transfer.Value, "18")
+
+		// 알림 전송
+		sendIncomingTransactionNotification(walletDBConn, header, userId, transfer.From, transfer.To, amount, transfer.TransactionHash)
+
+		// 알림 기록 저장
+		saveNotificationRecord(walletDBConn, userId, transfer.TransactionHash, transfer.From, transfer.To, amount, "CYBX")
+
+		newTransactionCount++
+
+		umlog.Info("checkWalletWithAlchemy\nNew incoming tx detected - User: %d, From: %s, Amount: %s CYBX, Hash: %s",
+			userId, transfer.From, amount, transfer.TransactionHash)
+	}
+
+	return newTransactionCount, nil
+}
+
+/*
+**************************************************************
+
+	desc : Hex 값으로 토큰 금액 계산 (decimal 적용)
+	parameter
+		- hexValue : 토큰 raw value (hex 문자열)
+		- decimal  : 토큰 decimal
+	return
+		- string : 사람이 읽을 수 있는 금액
+
+**************************************************************
+*/
+func calculateTokenAmountFromHex(hexValue string, decimal string) string {
+	// hex를 big.Int로 변환
+	valueInt := new(big.Int)
+	if strings.HasPrefix(hexValue, "0x") {
+		hexValue = strings.TrimPrefix(hexValue, "0x")
+	}
+	valueInt.SetString(hexValue, 16)
+
+	// decimal을 int로 변환
+	decimalInt, _ := strconv.Atoi(decimal)
+
+	// 10^decimal 계산
+	divisor := new(big.Int).Exp(big.NewInt(10), big.NewInt(int64(decimalInt)), nil)
+
+	// 나눗셈
+	result := new(big.Float).Quo(
+		new(big.Float).SetInt(valueInt),
+		new(big.Float).SetInt(divisor),
+	)
+
+	// 소수점 4자리까지 표시
+	return result.Text('f', 4)
+}
+
+/*
+**************************************************************
+
+	desc : 모든 활성 사용자의 지갑 체크 (Alchemy API 사용)
+	parameter
+		- walletDBConn    : Wallet DB 핸들러
+		- contractAddress : CYBX 토큰 컨트랙트 주소
+		- batchSize       : 한 번에 처리할 사용자 수
+		- netType         : 네트워크 타입
+		- CODE_STRC       : 설정 정보
+
+**************************************************************
+*/
+func checkAllWalletsWithAlchemy(walletDBConn *sql.DB, header model.Header, contractAddress string, batchSize int, CODE_STRC model.CodeStrc) {
+	startTime := time.Now()
+
+	// 배치 시작 시 현재 블록 번호 한 번만 조회
+	currentBlock := getCurrentBlockNumberAlchemy(CODE_STRC)
+	if currentBlock == 0 {
+		umlog.Error("Failed to get current block number")
+		return
+	}
+	umlog.Debug("Current block: %d - will be used for all wallets in this batch", currentBlock)
+
+	// 활성 사용자 목록 조회 (최근 활동 순)
+	query := `
+		SELECT id, address, checkedAt
+		FROM ank_wallet_user 
+		WHERE address > ''
+		ORDER BY checkedAt ASC
+		LIMIT ?
+	`
+
+	rows, err := walletDBConn.Query(query, batchSize)
+	if err != nil {
+		umlog.Error("checkAllWalletsWithAlchemy\nDB query failed: %v", err)
+		return
+	}
+	defer rows.Close()
+
+	totalChecked := 0
+	totalNewTransactions := 0
+
+	// 요청 분산 간격 계산 (batchSize개를 3초에 균등 분산)
+	// 예: 12개 → 3000ms ÷ 12 = 250ms 간격
+	delayBetweenRequests := time.Duration(3000/batchSize) * time.Millisecond
+
+	for rows.Next() {
+		var userId int
+		var walletAddress string
+		var lastCheckStr string
+
+		err := rows.Scan(&userId, &walletAddress, &lastCheckStr)
+		if err != nil {
+			umlog.Error("checkAllWalletsWithAlchemy\nRow scan error: %v", err)
+			continue
+		}
+
+		// 마지막 체크 시각 파싱
+		lastCheckTime, _ := time.Parse("2006-01-02 15:04:05", lastCheckStr)
+
+		// 개별 지갑 체크 (현재 블록 번호를 파라미터로 전달)
+		newTxCount, err := checkWalletWithAlchemy(walletDBConn, header, userId, walletAddress, contractAddress, lastCheckTime, currentBlock, CODE_STRC)
+		if err != nil {
+			// 에러 로그는 checkWalletWithAlchemy 내부에서 이미 출력됨
+			continue
+		}
+
+		// 마지막 체크 시각 업데이트
+		updateLastCheckTime(walletDBConn, userId)
+
+		totalChecked++
+		totalNewTransactions += newTxCount
+
+		// 다음 요청 전 대기 (마지막 요청 후에는 대기 불필요)
+		if totalChecked < batchSize {
+			time.Sleep(delayBetweenRequests)
+		}
+	}
+
+	elapsed := time.Since(startTime)
+
+	umlog.Info("checkAllWalletsWithAlchemy\nBatch completed - Checked: %d wallets, New transactions: %d, Time: %.2f seconds",
+		totalChecked, totalNewTransactions, elapsed.Seconds())
+}
+
+/*
+**************************************************************
+
+	desc : 트랜잭션 모니터링 시작 (Alchemy API 사용)
+	parameter
+		- walletDBConn    : Wallet DB 핸들러
+		- contractAddress : CYBX 토큰 컨트랙트 주소
+		- checkInterval   : 체크 주기
+		- batchSize       : 한 번에 처리할 사용자 수
+		- netType         : 네트워크 타입
+		- CODE_STRC       : 설정 정보
+
+**************************************************************
+*/
+func StartTransactionMonitorAlchemy(walletDBConn *sql.DB, header model.Header, contractAddress string, checkInterval time.Duration, batchSize int, CODE_STRC model.CodeStrc) {
+	umlog.Debug("[StartTransactionMonitorAlchemy] Starting monitor - Interval: %v, Batch size: %d\n", checkInterval, batchSize)
+	umlog.Debug("[StartTransactionMonitorAlchemy] Contract Address: %s\n", contractAddress)
+	umlog.Debug("[StartTransactionMonitorAlchemy] Alchemy URL: %s\n", CODE_STRC.ALCHEMY_MAINNET)
+
+	ticker := time.NewTicker(checkInterval)
+	defer ticker.Stop()
+
+	// 즉시 한 번 실행
+	checkAllWalletsWithAlchemy(walletDBConn, header, contractAddress, batchSize, CODE_STRC)
+
+	// 주기적 실행
+	for range ticker.C {
+		checkAllWalletsWithAlchemy(walletDBConn, header, contractAddress, batchSize, CODE_STRC)
+	}
+}
+
+/*
+**************************************************************
+
+	desc : 입금 알림 전송 (FCM Push + Telegram)
+	parameter
+		- walletDBConn : Wallet DB 핸들러
+		- userId       : 사용자 ID
+		- fromAddress  : 발신 주소
+		- toAddress    : 수신 주소
+		- amount       : 금액
+		- txHash       : 트랜잭션 해시
+
+**************************************************************
+*/
+func sendIncomingTransactionNotification(walletDBConn *sql.DB, header model.Header, userId int, fromAddress string, toAddress string, amount string, txHash string) {
+	// FCM 토큰 조회
+	var fcmToken, angkorId string
+	query := "SELECT fcm_token, angkorid FROM ank_wallet_user WHERE id = ?"
+	umlog.Debug("authCode count query: %s", query)
+	rows, _, err := umsql.SqlSelect(walletDBConn, query, userId)
+	if err != nil {
+		umlog.Error("SELECT Error(%s): %s", err.Error(), query)
+		return
+	}
+	defer rows.Close()
+
+	if rows.Next() {
+		if scanErr := rows.Scan(&fcmToken, &angkorId); scanErr != nil {
+			umlog.Error("SELECT Scan Error(%s): %s", scanErr.Error(), query)
+			return
+		}
+	}
+
+	// FCM Push 알림 (FCM 토큰이 있는 경우)
+	// if fcmToken.Valid && fcmToken.String != "" {
+	// 	sendFCMPushNotification(fcmToken.String, amount, fromAddress, txHash)
+	// }
+
+	// Telegram 알림 (관리자용)
+	messageboxy := fmt.Sprintf(
+		"💰 Deposit notification(from Alchemy)\nFrom: %s\nTo: %s\nAmount: %s CYBX\nTxHash: %s",
+		fromAddress, toAddress, amount, txHash)
+	message := map[string]string{"message": messageboxy}
+	jsonData, err := json.Marshal(message)
+	if err != nil {
+		umlog.Warn("SendMessage Error(%s): %v", err.Error(), message)
+	}
+	SendMessage(header, angkorId, string(jsonData))
+}
diff --git a/src/common.go b/src/common.go
new file mode 100644
index 0000000..c365c28
--- /dev/null
+++ b/src/common.go
@@ -0,0 +1,149 @@
+package src
+
+import (
+	"AngkorWalletScanning/model"
+	"AngkorWalletScanning/umlog"
+	"AngkorWalletScanning/umsql"
+	"bytes"
+	"database/sql"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"strconv"
+)
+
+/*
+**************************************************************
+
+	desc : 	DB에서 코드값을 읽어온다.
+	parameter
+		- dbConn		: DB 핸들러
+		- key			: AES 복호화 키
+	return
+		- int			: 상태 코드
+		- model.CodeStrc: 코드 구조체
+	error code
+		- 4001202 : DB 연결이 nil
+		- 4001213 : DB 조회 오류
+		- 4001215 : DB 스캔 오류
+
+**************************************************************
+*/
+func GetCodeInfo(dbConn *sql.DB, key string) (int, model.CodeStrc) {
+	var status int = 200
+	var code_strc model.CodeStrc
+
+	// DB 연결 검증
+	if dbConn == nil {
+		umlog.Error("DB connection is nil")
+		return 4001202, code_strc
+	}
+
+	// 매개변수 검증
+	if len(key) == 0 {
+		umlog.Error("Decryption key is empty")
+		return 4001213, code_strc
+	}
+
+	// SQL 쿼리 (매개변수 바인딩 사용)
+	query := `SELECT code_name, AES_DECRYPT(UNHEX(code_value), ?) AS code_value 
+			  FROM angkor_code 
+			  WHERE code_number IN ('001001', '001002', '001010', '001011', '001003', '001004', '001005', '100001', '100002', '100003', '100004', '100005')`
+
+	res, _, err := umsql.SqlSelect(dbConn, query, key)
+	if err != nil {
+		umlog.Error("SELECT Error(%s): %s", err.Error(), query)
+		return 4001213, code_strc
+	}
+	defer res.Close()
+
+	for res.Next() {
+		var code_name, code_value string
+		if err := res.Scan(&code_name, &code_value); err != nil {
+			umlog.Error("SCAN Error(%s): %s", err.Error(), query)
+			return 4001215, code_strc
+		}
+
+		// 코드명에 따라 구조체 필드 설정
+		switch code_name {
+		case "CIPHERKEY":
+			code_strc.CIPHERKEY = code_value
+		case "CIPHERIVKEY":
+			code_strc.CIPHERIVKEY = code_value
+		case "MESSAGE_TOKEN":
+			code_strc.MESSAGE_TOKEN = code_value
+		case "MESSAGE_ID":
+			code_strc.MESSAGE_ID = code_value
+		case "SENDBIRD_KEY":
+			code_strc.SENDBIRD_KEY = code_value
+		case "SENDBIRD_TOKEN":
+			code_strc.SENDBIRD_TOKEN = code_value
+		case "SENDBIRD_VERSION":
+			code_strc.SENDBIRD_VERSION = code_value
+		case "ETHERSCAN":
+			code_strc.ETHERSCAN_TOKEN = code_value
+		case "CYBX_MAINNET":
+			code_strc.CYBX_MAINNET = code_value
+		case "CYBX_TESTNET":
+			code_strc.CYBX_TESTNET = code_value
+		case "ALCHEMY_MAINNET":
+			code_strc.ALCHEMY_MAINNET = code_value
+		case "ALCHEMY_TESTNET":
+			code_strc.ALCHEMY_TESTNET = code_value
+		default:
+			umlog.Warn("Unknown code_name: %s", code_name)
+		}
+	}
+
+	return status, code_strc
+}
+
+func SendMessage(header model.Header, angkorId string, message string) error {
+	// Media 서버에서 사용자 정보 조회
+	fullUrl := "https://aauth.angkorlifes.com/message/v1/chat"
+	var sendBody = map[string]any{
+		"grantType":   "session",
+		"angkorId":    angkorId,
+		"messageType": "WAL",
+		"notiMessage": message,
+	}
+	sendBodyByte, err := json.Marshal(sendBody)
+	if err != nil {
+		umlog.Warn("JSON marshal error: %s", err.Error())
+		return err
+	}
+	req, err := http.NewRequest("POST", fullUrl, bytes.NewBuffer(sendBodyByte))
+	if err != nil {
+		umlog.Warn("Error creating request: => %s : %s", fullUrl, err.Error())
+		return err
+	}
+	//Content-Type 헤더 추가
+	req.Header.Add("Content-Type", "application/json")
+	req.Header.Add("AppKey", header.AppKey)
+	req.Header.Add("Authorization", header.SecretKey)
+
+	client := &http.Client{}
+	resp, err := client.Do(req)
+	if err != nil {
+		umlog.Warn("Error: => %s", err.Error())
+		return err
+	}
+	defer resp.Body.Close()
+
+	umlog.Debug("StatusCode: => %d", resp.StatusCode)
+
+	// 응답 본문 읽기
+	resBody, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		umlog.Warn("Error reading response body: %s", err.Error())
+		return err
+	}
+
+	if resp.StatusCode != 200 {
+		// 실패 응답
+		umlog.Warn("User info retrieval failed - Status: %d, Response: %s", resp.StatusCode, string(resBody))
+		return fmt.Errorf("User info retrieval failed - Status: %s, Response: %s", strconv.Itoa(resp.StatusCode), string(resBody))
+	}
+	return nil
+}
diff --git a/src/etherscan.go b/src/etherscan.go
new file mode 100644
index 0000000..27f6816
--- /dev/null
+++ b/src/etherscan.go
@@ -0,0 +1,464 @@
+package src
+
+import (
+	"AngkorWalletScanning/model"
+	"AngkorWalletScanning/umlog"
+	"context"
+	"database/sql"
+	"encoding/json"
+	"fmt"
+	"io"
+	"math/big"
+	"net/http"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+
+	"golang.org/x/time/rate"
+)
+
+// BSCScan API Rate Limiter (5 requests per second for free tier)
+var bscApiLimiter = rate.NewLimiter(rate.Limit(5), 5)
+
+// BSCScan API Response Structures
+type BSCScanTransaction struct {
+	BlockNumber       string `json:"blockNumber"`
+	TimeStamp         string `json:"timeStamp"`
+	Hash              string `json:"hash"`
+	From              string `json:"from"`
+	To                string `json:"to"`
+	Value             string `json:"value"`
+	ContractAddress   string `json:"contractAddress"`
+	TokenName         string `json:"tokenName"`
+	TokenSymbol       string `json:"tokenSymbol"`
+	TokenDecimal      string `json:"tokenDecimal"`
+	TransactionIndex  string `json:"transactionIndex"`
+	Gas               string `json:"gas"`
+	GasPrice          string `json:"gasPrice"`
+	GasUsed           string `json:"gasUsed"`
+	CumulativeGasUsed string `json:"cumulativeGasUsed"`
+	Input             string `json:"input"`
+	Confirmations     string `json:"confirmations"`
+}
+
+type BSCScanResponse struct {
+	Status  string               `json:"status"`
+	Message string               `json:"message"`
+	Result  []BSCScanTransaction `json:"result"`
+}
+
+/*
+**************************************************************
+
+	desc : BSCScan API를 통해 특정 주소의 토큰 트랜잭션 조회
+	parameter
+		- address       : 조회할 지갑 주소
+		- contractAddress : 토큰 컨트랙트 주소 (CYBX)
+		- startBlock    : 시작 블록 번호 (0 = 처음부터)
+		- netType       : 네트워크 타입 ("MAINNET" 또는 "TESTNET")
+	return
+		- []BSCScanTransaction : 트랜잭션 목록
+		- error                : 에러 정보
+
+**************************************************************
+*/
+func getBSCScanTokenTransactions(address string, contractAddress string, startBlock int64, netType string, CODE_STRC model.CodeStrc) ([]BSCScanTransaction, error) {
+	// Rate limiter 체크 (5 requests per second)
+	ctx := context.Background()
+	err := bscApiLimiter.Wait(ctx)
+	if err != nil {
+		return nil, fmt.Errorf("rate limiter error: %v", err)
+	}
+
+	// chainid 결정 (MAINNET: 56, TESTNET: 97)
+	chainId := "56" // BSC Mainnet
+	if netType == "TESTNET" {
+		chainId = "97" // BSC Testnet
+	}
+
+	// Etherscan API V2 URL 구성
+	url := fmt.Sprintf(
+		"https://api.etherscan.io/v2/api?chainid=%s&module=account&action=tokentx&contractaddress=%s&address=%s&startblock=%d&endblock=999999999&sort=desc&apikey=%s",
+		chainId,
+		contractAddress,
+		address,
+		startBlock,
+		CODE_STRC.ETHERSCAN_TOKEN,
+	)
+
+	// HTTP GET 요청
+	resp, err := http.Get(url)
+	if err != nil {
+		return nil, fmt.Errorf("http request failed: %v", err)
+	}
+	defer resp.Body.Close()
+
+	// 응답 읽기
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read response: %v", err)
+	}
+
+	// JSON 파싱
+	var bscResp BSCScanResponse
+	err = json.Unmarshal(body, &bscResp)
+	if err != nil {
+		return nil, fmt.Errorf("failed to parse json: %v", err)
+	}
+
+	// API 응답 상태 체크
+	if bscResp.Status != "1" {
+		if bscResp.Message == "No transactions found" {
+			return []BSCScanTransaction{}, nil
+		}
+		return nil, fmt.Errorf("bscscan api error: %s", bscResp.Message)
+	}
+
+	return bscResp.Result, nil
+}
+
+/*
+**************************************************************
+
+	desc : 특정 지갑의 입금 트랜잭션 체크 및 알림 전송
+	parameter
+		- walletDBConn    : Wallet DB 핸들러
+		- userId          : 사용자 ID
+		- walletAddress   : 지갑 주소
+		- contractAddress : CYBX 토큰 컨트랙트 주소
+		- lastCheckTime   : 마지막 체크 시각
+		- netType         : 네트워크 타입 ("MAINNET" 또는 "TESTNET")
+	return
+		- int : 새로 발견된 입금 건수
+		- error : 에러 정보
+
+**************************************************************
+*/
+func checkWalletWithAPI(walletDBConn *sql.DB, header model.Header, userId int, walletAddress string, contractAddress string, lastCheckTime time.Time, netType string, CODE_STRC model.CodeStrc) (int, error) {
+	// 마지막 체크 시각을 블록 번호로 변환 (BSC는 약 3초당 1블록)
+	timeDiff := time.Since(lastCheckTime)
+	blocksToCheck := int64(timeDiff.Seconds() / 3) // 3초당 1블록
+
+	// 최소 100블록은 체크 (약 5분)
+	if blocksToCheck < 100 {
+		blocksToCheck = 100
+	}
+
+	// 현재 블록에서 역산
+	currentBlock := getCurrentBlockNumber(netType)
+	startBlock := currentBlock - blocksToCheck
+	if startBlock < 0 {
+		startBlock = 0
+	}
+
+	// BSCScan API로 트랜잭션 조회
+	transactions, err := getBSCScanTokenTransactions(walletAddress, contractAddress, startBlock, netType, CODE_STRC)
+	if err != nil {
+		umlog.Error("checkWalletWithAPI\nFailed to get transactions for user %d: %v", userId, err)
+		return 0, err
+	}
+
+	newTransactionCount := 0
+
+	// 입금 트랜잭션 필터링 (To == 내 지갑 주소)
+	for _, tx := range transactions {
+		// 소문자로 변환하여 비교
+		if strings.ToLower(tx.To) != strings.ToLower(walletAddress) {
+			continue // 출금 트랜잭션은 무시
+		}
+
+		// 트랜잭션 시각 체크
+		txTimestamp, _ := strconv.ParseInt(tx.TimeStamp, 10, 64)
+		txTime := time.Unix(txTimestamp, 0)
+
+		// 마지막 체크 이후의 트랜잭션만 처리
+		if txTime.Before(lastCheckTime) {
+			continue
+		}
+
+		// 이미 알림 보낸 트랜잭션인지 확인
+		if isTransactionNotified(walletDBConn, tx.Hash) {
+			continue
+		}
+
+		// 금액 계산 (토큰 decimal 적용)
+		amount := calculateTokenAmount(tx.Value, tx.TokenDecimal)
+
+		// 알림 전송
+		sendIncomingTransactionNotification(walletDBConn, header, userId, tx.From, walletAddress, amount, tx.Hash)
+
+		// 알림 기록 저장
+		saveNotificationRecord(walletDBConn, userId, tx.Hash, tx.From, tx.To, amount, tx.TokenSymbol)
+
+		newTransactionCount++
+
+		umlog.Info("checkWalletWithAPI\nNew incoming tx detected - User: %d, From: %s, Amount: %s %s, Hash: %s",
+			userId, tx.From, amount, tx.TokenSymbol, tx.Hash)
+	}
+
+	return newTransactionCount, nil
+}
+
+/*
+**************************************************************
+
+	desc : 현재 BSC 블록 번호 조회
+	parameter
+		- netType : 네트워크 타입 ("MAINNET" 또는 "TESTNET")
+	return
+		- int64 : 현재 블록 번호
+
+**************************************************************
+*/
+func getCurrentBlockNumber(netType string) int64 {
+	apiKey := os.Getenv("BSCSCAN_API_KEY")
+	if apiKey == "" {
+		return 0
+	}
+
+	// chainid 결정 (MAINNET: 56, TESTNET: 97)
+	chainId := "56" // BSC Mainnet
+	if netType == "TESTNET" {
+		chainId = "97" // BSC Testnet
+	}
+
+	url := fmt.Sprintf("https://api.etherscan.io/v2/api?chainid=%s&module=proxy&action=eth_blockNumber&apikey=%s", chainId, apiKey)
+
+	resp, err := http.Get(url)
+	if err != nil {
+		return 0
+	}
+	defer resp.Body.Close()
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return 0
+	}
+
+	var result map[string]interface{}
+	json.Unmarshal(body, &result)
+
+	if blockHex, ok := result["result"].(string); ok {
+		blockNum := new(big.Int)
+		blockNum.SetString(blockHex[2:], 16) // "0x" 제거 후 16진수 파싱
+		return blockNum.Int64()
+	}
+
+	return 0
+}
+
+/*
+**************************************************************
+
+	desc : 토큰 금액 계산 (decimal 적용)
+	parameter
+		- value   : 토큰 raw value (wei 단위)
+		- decimal : 토큰 decimal
+	return
+		- string : 사람이 읽을 수 있는 금액
+
+**************************************************************
+*/
+func calculateTokenAmount(value string, decimal string) string {
+	// value를 big.Int로 변환
+	valueInt := new(big.Int)
+	valueInt.SetString(value, 10)
+
+	// decimal을 int로 변환
+	decimalInt, _ := strconv.Atoi(decimal)
+
+	// 10^decimal 계산
+	divisor := new(big.Int).Exp(big.NewInt(10), big.NewInt(int64(decimalInt)), nil)
+
+	// 나눗셈
+	result := new(big.Float).Quo(
+		new(big.Float).SetInt(valueInt),
+		new(big.Float).SetInt(divisor),
+	)
+
+	// 소수점 4자리까지 표시
+	return result.Text('f', 4)
+}
+
+/*
+**************************************************************
+
+	desc : 알림 기록을 DB에 저장
+	parameter
+		- walletDBConn : Wallet DB 핸들러
+		- userId       : 사용자 ID
+		- txHash       : 트랜잭션 해시
+		- txFrom       : 발신 주소
+		- txTo         : 수신 주소
+		- amount       : 금액
+		- token        : 토큰 심볼
+
+**************************************************************
+*/
+func saveNotificationRecord(walletDBConn *sql.DB, userId int, txHash string, txFrom string, txTo string, amount string, token string) {
+	query := `
+		INSERT INTO ank_wallet_notification 
+		(user_id, tx_hash, tx_from, tx_to, amount, token, notified_at)
+		VALUES (?, ?, ?, ?, ?, ?, NOW())
+	`
+
+	_, err := walletDBConn.Exec(query, userId, txHash, txFrom, txTo, amount, token)
+	if err != nil {
+		umlog.Error("saveNotificationRecord", fmt.Sprintf("Failed to save notification: %v", err))
+	}
+}
+
+/*
+**************************************************************
+
+	desc : 사용자의 마지막 체크 시각 업데이트
+	parameter
+		- walletDBConn : Wallet DB 핸들러
+		- userId       : 사용자 ID
+
+**************************************************************
+*/
+func updateLastCheckTime(walletDBConn *sql.DB, userId int) {
+	query := "UPDATE ank_wallet_user SET checkedAt = NOW() WHERE id = ?"
+
+	_, err := walletDBConn.Exec(query, userId)
+	if err != nil {
+		umlog.Error("updateLastCheckTime\nFailed to update last_check_time for user %d: %v", userId, err)
+	}
+}
+
+/*
+**************************************************************
+
+	desc : FCM Push 알림 전송
+	parameter
+		- fcmToken    : FCM 토큰
+		- amount      : 입금 금액
+		- fromAddress : 발신 주소
+		- txHash      : 트랜잭션 해시
+
+**************************************************************
+*/
+func sendFCMPushNotification(fcmToken string, amount string, fromAddress string, txHash string) {
+	// TODO: Firebase Admin SDK를 사용하여 FCM Push 알림 구현
+	// 여기서는 구조만 제공하고, 실제 구현은 프로젝트 환경에 맞게 작성 필요
+
+	umlog.Info("sendFCMPushNotification\nSending FCM push to token: %s, Amount: %s CYBX", fcmToken[:20]+"...", amount)
+
+	// Example:
+	// message := &messaging.Message{
+	// 	Token: fcmToken,
+	// 	Notification: &messaging.Notification{
+	// 		Title: "입금 알림",
+	// 		Body:  fmt.Sprintf("%s CYBX가 입금되었습니다.", amount),
+	// 	},
+	// 	Data: map[string]string{
+	// 		"type":        "incoming_transaction",
+	// 		"amount":      amount,
+	// 		"from":        fromAddress,
+	// 		"txHash":      txHash,
+	// 	},
+	// }
+	//
+	// _, err := fcmClient.Send(ctx, message)
+	// if err != nil {
+	// 	umlog.Error("sendFCMPushNotification", fmt.Sprintf("FCM send failed: %v", err))
+	// }
+}
+
+/*
+**************************************************************
+
+	desc : 모든 활성 사용자의 지갑 체크 (배치 처리)
+	parameter
+		- walletDBConn    : Wallet DB 핸들러
+		- contractAddress : CYBX 토큰 컨트랙트 주소
+		- batchSize       : 한 번에 처리할 사용자 수 (기본 300)
+		- netType         : 네트워크 타입 ("MAINNET" 또는 "TESTNET")
+
+**************************************************************
+*/
+func checkAllWalletsForIncomingTransactions(walletDBConn *sql.DB, header model.Header, contractAddress string, batchSize int, netType string, CODE_STRC model.CodeStrc) {
+	startTime := time.Now()
+
+	// 활성 사용자 목록 조회 (최근 활동 순)
+	query := `
+		SELECT id, address, checkedAt
+		FROM ank_wallet_user 
+		WHERE address > ''
+		ORDER BY checkedAt ASC
+		LIMIT ?
+	`
+
+	rows, err := walletDBConn.Query(query, batchSize)
+	if err != nil {
+		umlog.Error("checkAllWalletsForIncomingTransactions\nDB query failed: %v", err)
+		return
+	}
+	defer rows.Close()
+
+	totalChecked := 0
+	totalNewTransactions := 0
+
+	for rows.Next() {
+		var userId int
+		var walletAddress string
+		var lastCheckStr string
+
+		err := rows.Scan(&userId, &walletAddress, &lastCheckStr)
+		if err != nil {
+			umlog.Error("checkAllWalletsForIncomingTransactions\nRow scan error: %v", err)
+			continue
+		}
+
+		// 마지막 체크 시각 파싱
+		lastCheckTime, _ := time.Parse("2006-01-02 15:04:05", lastCheckStr)
+
+		// 개별 지갑 체크
+		newTxCount, err := checkWalletWithAPI(walletDBConn, header, userId, walletAddress, contractAddress, lastCheckTime, netType, CODE_STRC)
+		if err != nil {
+			// 에러 로그는 checkWalletWithAPI 내부에서 이미 출력됨
+			continue
+		}
+
+		// 마지막 체크 시각 업데이트
+		updateLastCheckTime(walletDBConn, userId)
+
+		totalChecked++
+		totalNewTransactions += newTxCount
+	}
+
+	elapsed := time.Since(startTime)
+
+	umlog.Info("checkAllWalletsForIncomingTransactions\nBatch completed - Checked: %d wallets, New transactions: %d, Time: %.2f seconds",
+		totalChecked, totalNewTransactions, elapsed.Seconds())
+}
+
+/*
+**************************************************************
+
+	desc : 트랜잭션 모니터링 시작 (백그라운드 고루틴)
+	parameter
+		- walletDBConn    : Wallet DB 핸들러
+		- contractAddress : CYBX 토큰 컨트랙트 주소
+		- checkInterval   : 체크 주기 (예: 5분)
+		- batchSize       : 한 번에 처리할 사용자 수
+		- netType         : 네트워크 타입 ("MAINNET" 또는 "TESTNET")
+
+**************************************************************
+*/
+func StartTransactionMonitor(walletDBConn *sql.DB, header model.Header, contractAddress string, checkInterval time.Duration, batchSize int, netType string, CODE_STRC model.CodeStrc) {
+	umlog.Info("StartTransactionMonitor: Transaction monitor started - Network: %s, Interval: %v, Batch size: %d", netType, checkInterval, batchSize)
+
+	ticker := time.NewTicker(checkInterval)
+	defer ticker.Stop()
+
+	// 즉시 한 번 실행
+	checkAllWalletsForIncomingTransactions(walletDBConn, header, contractAddress, batchSize, netType, CODE_STRC)
+
+	// // 주기적 실행
+	// for range ticker.C {
+	// 	checkAllWalletsForIncomingTransactions(walletDBConn, header, contractAddress, batchSize, netType, CODE_STRC)
+	// }
+}
diff --git a/umlog/umlog.go b/umlog/umlog.go
new file mode 100644
index 0000000..575d9c3
--- /dev/null
+++ b/umlog/umlog.go
@@ -0,0 +1,103 @@
+package umlog
+
+import (
+	"AngkorWalletScanning/ummessage"
+	"fmt"
+	"log"
+	"os"
+	"runtime"
+	"strconv"
+	"strings"
+)
+
+type Logger struct {
+	Debug *log.Logger
+	Info  *log.Logger
+	Warn  *log.Logger
+	Error *log.Logger
+}
+
+var (
+	logFile   *os.File
+	umLogger  Logger
+	log_level string = ""
+)
+
+// 패키지 외부에서 사용하기 위해서는 첫문자는 대문자로...
+func Init(logfile string, messageToken string, messageId string) error {
+	var err error
+	logFile, err = os.OpenFile(logfile, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0o666)
+	if err != nil {
+		return err
+	}
+	umLogger.Debug = log.New(logFile, "[DEBUG] ", log.Ldate|log.Ltime)
+	umLogger.Info = log.New(logFile, "[INFO] ", log.Ldate|log.Ltime)
+	umLogger.Warn = log.New(logFile, "[WARN] ", log.Ldate|log.Ltime)
+	umLogger.Error = log.New(logFile, "[ERROR] ", log.Ldate|log.Ltime)
+
+	ummessage.InitTelegramBot(messageToken, messageId)
+
+	return nil
+}
+
+func Close() {
+	logFile.Close()
+}
+
+func SetLevel(level string) {
+	switch level {
+	case "I":
+		log_level = "info"
+	case "W":
+		log_level = "warn"
+	case "E":
+		log_level = "error"
+	default:
+		log_level = "debug"
+	}
+}
+
+func debugInfo() (string, string, string) {
+	funcname, filename, line, _ := runtime.Caller(2)
+	functionname := runtime.FuncForPC(funcname).Name()
+	filenames := strings.Split(filename, "/")
+	return filenames[len(filenames)-1], functionname, strconv.Itoa(line)
+}
+
+func Message(title string, body string) {
+	chatId := int64(-5029236432)
+	token := "7108014537:AAHU7299mCzHsBJp1KmPMp7tZEGfGsQ-ffM"
+	ummessage.SendMessageDirect(chatId, token, title, body)
+}
+func Error(format string, args ...interface{}) {
+	if log_level == "error" || log_level == "warn" || log_level == "info" || log_level == "debug" {
+		filename, function, line := debugInfo()
+		message := fmt.Sprintf(format, args...)
+		umLogger.Error.Println("[" + filename + "][" + function + "][" + line + "] " + message)
+		ummessage.SendMessage("["+filename+"]["+function+"]["+line+"]", message)
+	}
+}
+
+func Warn(format string, args ...interface{}) {
+	if log_level == "warn" || log_level == "info" || log_level == "debug" {
+		filename, _, line := debugInfo()
+		message := fmt.Sprintf(format, args...)
+		umLogger.Warn.Println("[" + filename + "][" + line + "] " + message)
+	}
+}
+
+func Info(format string, args ...interface{}) {
+	if log_level == "info" || log_level == "debug" {
+		filename, _, line := debugInfo()
+		message := fmt.Sprintf(format, args...)
+		umLogger.Info.Println("[" + filename + "][" + line + "] " + message)
+	}
+}
+
+func Debug(format string, args ...interface{}) {
+	if log_level == "debug" {
+		filename, function, line := debugInfo()
+		message := fmt.Sprintf(format, args...)
+		umLogger.Debug.Println("[" + filename + "][" + function + "][" + line + "] " + message)
+	}
+}
diff --git a/ummessage/ummessage.go b/ummessage/ummessage.go
new file mode 100644
index 0000000..ad6c83f
--- /dev/null
+++ b/ummessage/ummessage.go
@@ -0,0 +1,73 @@
+package ummessage
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"time"
+)
+
+var telegramToken string
+var telegramChatId string
+
+func InitTelegramBot(token string, chatId string) {
+	telegramToken = token
+	telegramChatId = chatId
+}
+
+type SendMessageModel struct {
+	Parse_mode               string
+	Chat_id                  string
+	Disable_web_page_preview bool
+	Text                     string
+}
+
+func SendMessage(title string, body string) {
+	message := `<b>` + title + `</b>
+	<b>발생시간(UTC)</b> : <code>` + time.Now().Format("2006-01-02 15:04:05") + `</code>
+	<b>내용</b> :
+	<pre>` + body + `</pre>`
+	messageBody, _ := json.Marshal(map[string]any{
+		"chat_id":    telegramChatId,
+		"text":       message,
+		"parse_mode": "html",
+	})
+	sendUrl := "https://api.telegram.org/bot" + telegramToken + "/sendMessage"
+	resp, err := http.Post(sendUrl, "application/json", bytes.NewBuffer(messageBody))
+	if err != nil {
+		fmt.Println(err.Error())
+	}
+	defer resp.Body.Close()
+
+	// 결과 출력
+	_, err = ioutil.ReadAll(resp.Body)
+	if err != nil {
+		fmt.Println(err.Error())
+	}
+}
+
+func SendMessageDirect(chatId int64, telegramToken string, title string, body string) {
+	message := `<b>` + title + `</b>
+	<b>발생시간(UTC)</b> : <code>` + time.Now().Format("2006-01-02 15:04:05") + `</code>
+	<b>내용</b> :
+	` + body
+	messageBody, _ := json.Marshal(map[string]any{
+		"chat_id":    chatId,
+		"text":       message,
+		"parse_mode": "html",
+	})
+	sendUrl := "https://api.telegram.org/bot" + telegramToken + "/sendMessage"
+	resp, err := http.Post(sendUrl, "application/json", bytes.NewBuffer(messageBody))
+	if err != nil {
+		panic(err)
+	}
+	defer resp.Body.Close()
+
+	// 결과 출력
+	_, err = ioutil.ReadAll(resp.Body)
+	if err != nil {
+		fmt.Println(err.Error())
+	}
+}
diff --git a/umredis/umredis-cluster.go b/umredis/umredis-cluster.go
new file mode 100644
index 0000000..2c2933c
--- /dev/null
+++ b/umredis/umredis-cluster.go
@@ -0,0 +1,100 @@
+package umredis
+
+import (
+	"context"
+	"time"
+
+	"AngkorWalletScanning/umlog"
+
+	"github.com/redis/go-redis/v9"
+)
+
+// version : 1.0.0
+// date    : 2022-10-19
+// writer  : lee.beomhee
+// modify  : lee.beomhee (2022-10-19)
+
+func RedisClusterConnect(host []string, password string) *redis.ClusterClient {
+	var rdb *redis.ClusterClient
+	if len(password) > 0 {
+		rdb = redis.NewClusterClient(&redis.ClusterOptions{
+			Addrs:    host,
+			Password: password,
+		})
+	} else {
+		rdb = redis.NewClusterClient(&redis.ClusterOptions{
+			Addrs: host,
+		})
+	}
+	return rdb
+}
+
+func RedisClusterDisConnect(cluster *redis.ClusterClient) {
+	umlog.Debug("REDIS DISCONNECTION")
+	cluster.Close()
+}
+
+func ClusterGetKeys(cluster *redis.ClusterClient, keys string) ([]string, error) {
+	return cluster.Keys(context.Background(), keys+"*").Result()
+}
+
+func ClusterGetValue(cluster *redis.ClusterClient, key string) (string, error) {
+
+	return cluster.Get(context.Background(), key).Result()
+}
+
+func ClusterHGetValue(cluster *redis.ClusterClient, key string, field string) (string, error) {
+	return cluster.HGet(context.Background(), key, field).Result()
+}
+
+func ClusterHGetAllValue(cluster *redis.ClusterClient, key string) (map[string]string, error) {
+	return cluster.HGetAll(context.Background(), key).Result()
+}
+
+func ClusterSetValue(cluster *redis.ClusterClient, key string, value any) error {
+	_, err := cluster.Set(context.Background(), key, value, 0).Result()
+	return err
+}
+
+func ClusterHMSetValue(cluster *redis.ClusterClient, key string, value any) error {
+	_, err := cluster.HMSet(context.Background(), key, value).Result()
+	return err
+}
+
+func ClusterHSetValue(cluster *redis.ClusterClient, key string, field string, value any) error {
+	_, err := cluster.HSet(context.Background(), key, field, value).Result()
+	return err
+}
+
+func ClusterHINCRBY(cluster *redis.ClusterClient, key string, field string, value int64) error {
+	_, err := cluster.HIncrBy(context.Background(), key, field, value).Result()
+	return err
+}
+
+func ClusterRemoveValue(cluster *redis.ClusterClient, key string, field string) error {
+	_, err := cluster.HDel(context.Background(), key, field).Result()
+	return err
+}
+
+func ClusterRemoveKey(cluster *redis.ClusterClient, key string) error {
+	_, err := cluster.Del(context.Background(), key).Result()
+	return err
+}
+
+func ClusterRemoveKeys(cluster *redis.ClusterClient, keys string) error {
+	findKeys, err := cluster.Keys(context.Background(), keys+"*").Result()
+	if err == nil {
+		for _, key := range findKeys {
+			_, err = cluster.Del(context.Background(), key).Result()
+			if err != nil {
+				break
+			}
+		}
+	}
+	return err
+}
+
+func ClusterExpireKey(cluster *redis.ClusterClient, key string, sec time.Duration) error {
+	_, err := cluster.Expire(context.Background(), key, sec).Result()
+	return err
+}
diff --git a/umsql/umsql.go b/umsql/umsql.go
new file mode 100644
index 0000000..a4aafda
--- /dev/null
+++ b/umsql/umsql.go
@@ -0,0 +1,209 @@
+package umsql
+
+import (
+	"database/sql"
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
+	"time"
+
+	"AngkorWalletScanning/model"
+	"AngkorWalletScanning/umlog"
+
+	_ "github.com/go-sql-driver/mysql"
+)
+
+// type DB_handler struct {
+// 	conn *sql.DB
+// }
+
+func DbConnect(host string, port string, user string, password string, dbname string) *sql.DB {
+	conn, connect_err := sql.Open("mysql", user+":"+password+"@tcp("+host+":"+port+")/"+dbname)
+	if connect_err != nil {
+		umlog.Error(connect_err.Error())
+		panic(connect_err.Error())
+	}
+	conn.SetConnMaxLifetime(time.Minute * 3)
+	conn.SetMaxOpenConns(1000)
+	conn.SetMaxIdleConns(1000)
+	return conn
+}
+
+func DbDisconnect(connA *sql.DB) {
+	umlog.Debug("DataBase DISCONNECTION")
+	err := connA.Close()
+	if err != nil {
+		umlog.Warn("DataBase DISCONNECTION Error A: " + err.Error())
+	}
+}
+
+func DbBegin(conn *sql.DB) (*sql.Tx, error) {
+	if conn != nil {
+		return conn.Begin()
+	} else {
+		return nil, errors.New("db connecter is nil")
+	}
+}
+
+func DbRollback(tx *sql.Tx) error {
+	return tx.Rollback()
+}
+
+func DbCommit(tx *sql.Tx) error {
+	return tx.Commit()
+}
+
+func SqlSelect(conn *sql.DB, query string, args ...any) (*sql.Rows, []string, error) {
+	var rows *sql.Rows
+	var err error
+
+	if conn != nil {
+		if len(args) == 0 {
+			rows, err = conn.Query(query)
+		} else {
+			rows, err = conn.Query(query, args...)
+		}
+		if err != nil {
+			umlog.Error(err.Error())
+			return nil, nil, err
+		}
+		cols, err := rows.Columns()
+		if err != nil {
+			umlog.Error(err.Error())
+			return nil, nil, err
+		}
+		return rows, cols, nil
+	}
+	umlog.Error("db connecter is nil")
+	return nil, nil, errors.New("db connecter is nil")
+}
+
+func SqlTxExecute(tx *sql.Tx, query string, args ...any) (int64, error) {
+	var result sql.Result
+	var err error
+
+	if tx != nil {
+		if len(args) == 0 {
+			result, err = tx.Exec(query)
+		} else {
+			result, err = tx.Exec(query, args...)
+		}
+		if err != nil {
+			umlog.Error(err.Error())
+			return -1, err
+		}
+		n, err := result.RowsAffected()
+		if err != nil {
+			umlog.Error(err.Error())
+			return -1, err
+		}
+		return n, nil
+	} else {
+		umlog.Error("tx is nil")
+		return -1, errors.New("tx is nil")
+	}
+}
+
+func SqlExecute(conn *sql.DB, query string, args ...any) (int64, error) {
+	var result sql.Result
+	var err error
+
+	if conn != nil {
+		if len(args) == 0 {
+			result, err = conn.Exec(query)
+		} else {
+			result, err = conn.Exec(query, args...)
+		}
+		if err != nil {
+			umlog.Error(err.Error())
+			return -1, err
+		}
+		n, err := result.RowsAffected()
+		if err != nil {
+			umlog.Error(err.Error())
+			return -1, err
+		}
+		return n, nil
+	}
+	umlog.Error("db connecter is nil")
+	return -1, errors.New("db connecter is nil")
+}
+
+func SqlStatement(conn *sql.DB, sql string, param [][]string) error {
+	stmt, err := conn.Prepare(sql)
+	if err != nil {
+		umlog.Error(err.Error())
+		return err
+	}
+	defer stmt.Close()
+
+	for i, sub_val := range param {
+		fmt.Println(sub_val)
+		err = sqlStatementExec(stmt, param[i], len(param[i]))
+		if err != nil {
+			umlog.Error(err.Error())
+			return err
+		}
+	}
+
+	return nil
+}
+
+func sqlStatementExec(stmt *sql.Stmt, param []string, param_count int) error {
+	args := make([]interface{}, param_count)
+	for i, v := range param {
+		args[i] = v
+	}
+	_, err := stmt.Exec(args...)
+	return err
+}
+
+func SqlTransaction(conn *sql.DB, maxRetries int, txFunc func(*sql.Tx) error) model.DefaultErrorModel {
+	var err error
+	var value string
+	for i := 0; i <= maxRetries; i++ {
+		tx, beginErr := conn.Begin()
+		if beginErr != nil {
+			return model.DefaultErrorModel{Code: 4001201, Message: fmt.Sprintf("failed to begin transaction: %v", beginErr)}
+		}
+
+		err = txFunc(tx)
+
+		if err != nil {
+			// 트랜잭션 롤백
+			_ = tx.Rollback()
+
+			// 1205 오류인지 확인
+			if isLockWaitTimeout(err) {
+				umlog.Info(value + ": Transaction lock timeout (1205), retrying... (" + strconv.Itoa(i+1) + "/" + strconv.Itoa(maxRetries) + ")")
+				time.Sleep(time.Duration(100*(i+1)) * time.Millisecond) // simple backoff
+				continue
+			}
+			return model.DefaultErrorModel{Code: 4001201, Message: fmt.Sprintf("transaction failed: %v", err)}
+		}
+
+		// 커밋 시도
+		commitErr := tx.Commit()
+		if commitErr != nil {
+			// 커밋 중 에러가 1205일 수도 있음
+			if isLockWaitTimeout(commitErr) {
+				umlog.Info(value + ": Commit failed due to lock timeout, retrying... (" + strconv.Itoa(i+1) + "/" + strconv.Itoa(maxRetries) + ")")
+				time.Sleep(time.Duration(100*(i+1)) * time.Millisecond)
+				continue
+			}
+			umlog.Error(value + ": commit error: " + commitErr.Error())
+			return model.DefaultErrorModel{Code: 4001201, Message: fmt.Sprintf("commit error: %v", commitErr)}
+		}
+		// 성공
+		return model.DefaultErrorModel{Code: 200, Message: ""}
+	}
+
+	umlog.Error(value + ": Transaction failed after " + strconv.Itoa(maxRetries) + " retries: " + err.Error())
+	return model.DefaultErrorModel{Code: 4001201, Message: fmt.Sprintf("%s: Transaction failed after %d retries: %w", value, maxRetries, err)}
+}
+
+func isLockWaitTimeout(err error) bool {
+	// mysql 드라이버의 오류 메시지에서 1205 감지
+	return err != nil && (strings.Contains(err.Error(), "Error 1205") || strings.Contains(err.Error(), "Lock wait timeout"))
+}