diff --git a/package.json b/package.json
index d8b580d..2b1fbb6 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,9 @@
     "lint": "eslint --ext .ts src/**",
     "format": "eslint --ext .ts src/** --fix",
     "dev:monitor": "NODE_ENV=development ts-node -r tsconfig-paths/register src/monitor.ts",
-    "prod:monitor": "NODE_PATH=./dist node dist/monitor.js"
+    "prod:monitor": "NODE_PATH=./dist node dist/monitor.js",
+    "dev:scription": "ts-node -r tsconfig-paths/register src/scriptions.ts",
+    "prod:scription": "TZ='SG' NODE_PATH=./dist node dist/scriptions.js"
   },
   "author": "z",
   "license": "ISC",
diff --git a/src/chain/allchain.ts b/src/chain/allchain.ts
index 4aa0136..e6d4cc3 100644
--- a/src/chain/allchain.ts
+++ b/src/chain/allchain.ts
@@ -1,4 +1,13 @@
-export const AllChains = [
+export interface IChain {
+  name: string
+  type: string
+  rpc: string
+  id: number
+  symbol: string
+  network?: string
+  explorerurl: string
+}
+export const AllChains: IChain[] = [
   {
     name: 'Ethereum Mainnet RPC',
     type: 'Mainnet',
@@ -210,7 +219,7 @@ export const AllChains = [
   {
     name: 'Arbitrum One',
     type: 'Mainnet',
-    rpc: 'https://arb1.arbitrum.io/rpc',
+    rpc: 'https://arbitrum-mainnet.infura.io/v3/b6bf7d3508c941499b10025c0776eaf8',
     id: 42161,
     network: 'ARBITRUM',
     symbol: 'ETH',
@@ -265,6 +274,15 @@ export const AllChains = [
     symbol: 'AGOR',
     explorerurl: 'https://goerli-rollup-explorer.arbitrum.io',
   },
+  {
+    name: 'Arbitrum Sepolia',
+    type: 'Testnet',
+    rpc: 'https://arbitrum-sepolia.infura.io/v3/b6bf7d3508c941499b10025c0776eaf8',
+    id: 421614,
+    network: 'ARB_SEPOLIA',
+    symbol: 'ETH',
+    explorerurl: 'https://sepolia.arbiscan.io',
+  },
   {
     name: 'Harmony Mainnet RPC',
     type: 'Mainnet',
diff --git a/src/chain/chain.api.ts b/src/chain/chain.api.ts
new file mode 100644
index 0000000..a2e10db
--- /dev/null
+++ b/src/chain/chain.api.ts
@@ -0,0 +1,29 @@
+
+const requestChain = async (rpc: string, method: string, params: any) => { 
+  const data = {
+    id: Date.now(),
+    jsonrpc: "2.0",
+    method,
+    params
+  }
+  return fetch(rpc, {
+    method: "POST",
+    headers: {
+      "Content-Type": "application/json; charset=utf-8"
+    },
+    body: JSON.stringify(data) 
+  })
+  .then((res) => res.json())
+}
+
+export const ethBlockNumber = async (rpc: string) => {
+  return requestChain(rpc, "eth_blockNumber", [])
+}
+
+export const ethGetBlockByNumber = async (rpc: string, blockNumber: string) => {
+  return requestChain(rpc, "eth_getBlockByNumber", [blockNumber, true])
+}
+
+export const ethGetLogs = async (rpc: string, params: any) => {
+  return requestChain(rpc, "eth_getLogs", [params])
+}
\ No newline at end of file
diff --git a/src/config/scriptions_cfg.ts b/src/config/scriptions_cfg.ts
new file mode 100644
index 0000000..e43c354
--- /dev/null
+++ b/src/config/scriptions_cfg.ts
@@ -0,0 +1,22 @@
+import { CheckIn } from "models/CheckIn"
+
+export interface IScriptionCfg {
+  chain: number,
+  fromBlock: number,
+  filter: (event: any) => boolean,
+  eventProcesser: (event: any) => Promise<void>,
+}
+
+export const SCRIPTIONS_CFG: IScriptionCfg[] = [
+  {
+    chain: 421614,
+    fromBlock: 5063559,
+    filter: (event: any) => {
+      return ( event.input === '0x646174613a2c7b2270223a2263662d3230222c226f70223a22636869636b227d'
+        && event.to.toLowerCase() === '0x50a8e60041a206acaa5f844a1104896224be6f39')
+    },
+    eventProcesser: async (event: any) => {
+      return CheckIn.saveEvent(event)
+    }
+  }
+]
\ No newline at end of file
diff --git a/src/models/CheckIn.ts b/src/models/CheckIn.ts
new file mode 100644
index 0000000..25b843c
--- /dev/null
+++ b/src/models/CheckIn.ts
@@ -0,0 +1,38 @@
+import { getModelForClass, index, modelOptions, prop } from '@typegoose/typegoose'
+import { dbconn } from 'decorators/dbconn'
+import { BaseModule } from './Base'
+
+@dbconn()
+@index({ address: 1 }, { unique: false })
+@index({ transactionHash: 1, from: 1, to: 1 }, { unique: true })
+@modelOptions({
+  schemaOptions: { collection: 'check_in_event', timestamps: true },
+})
+export class CheckInClass extends BaseModule {
+  @prop({ required: true })
+  public from!: string
+  @prop()
+  public to: string
+  @prop({ required: true })
+  public hash: string
+  @prop()
+  public blockNumber: string
+  @prop()
+  public blockHash: string
+  @prop()
+  public blockTime: number
+  @prop()
+  public dateTag: string
+  @prop()
+  public value: string
+  @prop()
+  public input: string
+
+  public static async saveEvent(event: any) {
+    return CheckIn.insertOrUpdate({ hash: event.hash }, event)
+  }
+}
+
+export const CheckIn = getModelForClass(CheckInClass, {
+  existingConnection: CheckInClass['db'],
+})
diff --git a/src/scriptions.ts b/src/scriptions.ts
new file mode 100644
index 0000000..28c4401
--- /dev/null
+++ b/src/scriptions.ts
@@ -0,0 +1,65 @@
+import * as dotenv from 'dotenv'
+import logger from 'logger/logger'
+import { RedisClient } from 'redis/RedisClient'
+const envFile = process.env.NODE_ENV && process.env.NODE_ENV === 'production' ? `.env.production` : '.env.development'
+dotenv.config({ path: envFile })
+import { EventSyncSvr } from 'service/event.sync.service'
+import {IScriptionCfg, SCRIPTIONS_CFG} from 'config/scriptions_cfg'
+
+
+import 'common/Extend'
+import { AllChains, IChain } from 'chain/allchain'
+import { BlockSyncSvr } from 'service/block.sync.service'
+
+let svrs: any[] = []
+let lock = false
+
+
+async function initEventSvrs() {
+  const cfgMap: Map<IChain, IScriptionCfg[]> = new Map();
+  for (let cfg of SCRIPTIONS_CFG) {
+    const chainCfg = AllChains.find((chain) => chain.id === cfg.chain)
+    if (!chainCfg) {
+      logger.error('chainCfg not found: ' + cfg.chain)
+      process.exit(1)
+    }
+    if (!cfgMap.has(chainCfg)) {
+      cfgMap.set(chainCfg, [])
+    }
+    cfgMap.get(chainCfg)?.push(cfg)
+  }
+  for (let chainCfg of cfgMap.keys()) {
+    const svr = new BlockSyncSvr(chainCfg, cfgMap.get(chainCfg)!)
+    svrs.push(svr)
+  }
+}
+
+async function parseAllEvents() {
+  if (lock) {
+    logger.info('sync in process, cancel.')
+    return
+  }
+  lock = true
+  logger.info('begin sync block: ' + svrs.length)
+  for (let svr of svrs) {
+    try {
+      await svr.execute()
+    } catch (err) {
+      logger.info('sync block with error:: chain: ' + svr.chainCfg.id )
+      logger.info(err)
+    }
+  }
+  lock = false
+}
+
+;(async () => {
+  let opts = { url: process.env.REDIS }
+  new RedisClient(opts)
+  logger.info('REDIS Connected')
+  await initEventSvrs()
+  setInterval(function () {
+    parseAllEvents()
+  }, 500)
+  parseAllEvents()
+})();
+
diff --git a/src/service/block.sync.service.ts b/src/service/block.sync.service.ts
new file mode 100644
index 0000000..64e0392
--- /dev/null
+++ b/src/service/block.sync.service.ts
@@ -0,0 +1,67 @@
+import { IChain } from "chain/allchain";
+import { ethGetBlockByNumber } from "chain/chain.api";
+import { IScriptionCfg } from "config/scriptions_cfg";
+import logger from "logger/logger";
+import { RedisClient } from "redis/RedisClient";
+import { formatDate } from "utils/date.util";
+import { retry } from "utils/promise.util";
+
+
+export class BlockSyncSvr {
+  chainCfg: IChain
+  scriptionCfgs: IScriptionCfg[] = []
+  fromBlock: number = Number.MAX_SAFE_INTEGER
+  redisKey = ''
+  constructor(_chainCfg: IChain, _scriptionCfgs: IScriptionCfg[]) {
+    this.chainCfg =_chainCfg
+    this.scriptionCfgs = _scriptionCfgs
+    for (let cfg of _scriptionCfgs) {
+      this.fromBlock = Math.min(this.fromBlock, cfg.fromBlock)
+    }
+    this.redisKey = `blocknum_${this.chainCfg.id}`
+  }
+
+  async execute() {
+    try {
+      let blockStr = await new RedisClient().get(this.redisKey)
+      if (blockStr) {
+        this.fromBlock = Math.max(parseInt(blockStr), this.fromBlock)
+      }
+      const block = await this.fetchBlock(this.chainCfg.rpc.split('|'), this.fromBlock);
+      if (!block.result.hash) {
+        logger.log(`${this.fromBlock} block not found`)
+        return
+      }
+      for (let i = 0; i < block.result.transactions.length; i++) {
+        const tx = block.result.transactions[i];
+        if (block.result.timestamp) {
+          tx.blockTime = parseInt(block.result.timestamp, 16);
+          tx.dateTag = formatDate(new Date(tx.blockTime * 1000));
+        }
+        for (let j = 0; j < this.scriptionCfgs.length; j++) {
+          const cfg = this.scriptionCfgs[j];
+          if (cfg.filter(tx)) {
+            await cfg.eventProcesser(tx)
+          }
+        }
+      }
+      await new RedisClient().set(this.redisKey, this.fromBlock + 1 + '')
+    } catch (err) {
+      console.log(err)
+    }
+  }
+
+  async fetchBlock(rpcs: string[], blockNumber: number) {
+    const blockNumberHex = '0x' + blockNumber.toString(16)
+    for (let rpc of rpcs) {
+      try {
+        let res = await retry(() => ethGetBlockByNumber(rpc, blockNumberHex), { maxRetries: 3, whitelistErrors: [] })
+        return res;
+      } catch (err) {
+        console.log(err)
+        throw err
+      }
+    }
+    
+  }
+}
\ No newline at end of file
diff --git a/src/service/chain.service.ts b/src/service/chain.service.ts
index a9ce27b..88d5f97 100644
--- a/src/service/chain.service.ts
+++ b/src/service/chain.service.ts
@@ -14,4 +14,4 @@ export async function restartAllUnFinishedTask() {
       chainQueue.addTaskToQueue(subTask)
     }
   }
-}
+}
\ No newline at end of file
diff --git a/src/utils/date.util.ts b/src/utils/date.util.ts
new file mode 100644
index 0000000..76b98ee
--- /dev/null
+++ b/src/utils/date.util.ts
@@ -0,0 +1,14 @@
+// format the date to the format we want
+export const formatDate = (date: Date): string => {
+  const year = date.getFullYear();
+  const month = (date.getMonth() + 1 + '').padStart(2, '0');
+  const day = (date.getDate() + '').padStart(2, '0');
+  return `${year}${month}${day}`;
+};
+
+// get formated datestring of yesterday
+export const yesterday = () => {
+  const date = new Date();
+  date.setDate(date.getDate() - 1);
+  return date;
+};
\ No newline at end of file