diff --git a/package.json b/package.json
index 1d26bb3..f494835 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ora-stack",
-  "version": "0.3.1",
+  "version": "0.3.2",
   "private": true,
   "packageManager": "pnpm@9.7.0",
   "description": "",
diff --git a/packages/orap/package.json b/packages/orap/package.json
index 3f2b23f..9b35111 100644
--- a/packages/orap/package.json
+++ b/packages/orap/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@ora-io/orap",
   "type": "module",
-  "version": "0.3.1",
+  "version": "0.3.2",
   "packageManager": "pnpm@8.10.5",
   "description": "",
   "author": "Norman (nom4dv3), MuRong",
diff --git a/packages/orap/src/flow/event.ts b/packages/orap/src/flow/event.ts
index be1ca02..35f11f3 100644
--- a/packages/orap/src/flow/event.ts
+++ b/packages/orap/src/flow/event.ts
@@ -3,7 +3,7 @@ import type { Context } from '../task'
 import type { TaskFlowParams } from '../flow/task'
 import { TaskFlow } from '../flow/task'
 import { StoreManager } from '../store'
-import type { EventSignalRegisterParams } from '../signal'
+import type { CrosscheckOptions, EventSignalRegisterParams } from '../signal'
 import { EventVerse } from '../verse/event'
 import type { TaskVerse } from '../verse/task'
 import type { Flow, HandleFn } from './interface'
@@ -33,7 +33,7 @@ export class EventFlow implements Flow {
     return this._taskFlows
   }
 
-  crosscheck(options?: Omit<AutoCrossCheckParam, 'address' | 'topics' | 'onMissingLog'>) {
+  crosscheck(options?: CrosscheckOptions) {
     this.partialCrosscheckOptions = options
     return this
   }
diff --git a/packages/orap/src/signal/event.ts b/packages/orap/src/signal/event.ts
index eb457dc..980ca77 100644
--- a/packages/orap/src/signal/event.ts
+++ b/packages/orap/src/signal/event.ts
@@ -12,6 +12,15 @@ export interface EventSignalRegisterParams {
   // esig?: string,
 }
 
+export interface CrosscheckParams {
+  /**
+   * Disable crosscheck
+   */
+  disabled?: boolean
+}
+
+export type CrosscheckOptions = CrosscheckParams & Omit<AutoCrossCheckParam, 'address' | 'topics' | 'onMissingLog'>
+
 export type EventSignalCallback = ethers.Listener
 
 export class EventSignal implements Signal {
@@ -25,11 +34,12 @@ export class EventSignal implements Signal {
 
   crosschecker?: AutoCrossChecker
   crosscheckerOptions?: AutoCrossCheckParam
+  crosscheckerParams?: CrosscheckParams
 
   constructor(
     public params: EventSignalRegisterParams,
     public callback: EventSignalCallback,
-    crosscheckOptions?: Omit<AutoCrossCheckParam, 'address' | 'topics' | 'onMissingLog'>,
+    crosscheckOptions?: CrosscheckOptions,
   ) {
     this.contract = new ethers.Contract(
       params.address,
@@ -69,7 +79,7 @@ export class EventSignal implements Signal {
     return new ContractUnknownEventPayload(this.contract, this.subscribeCallback, this.params.eventName, log)
   }
 
-  private _setCrosscheckOptions(options: Omit<AutoCrossCheckParam, 'address' | 'topics' | 'onMissingLog'>) {
+  private _setCrosscheckOptions(options: CrosscheckOptions) {
     const {
       pollingInterval = ONE_MINUTE_MS * 60,
       ignoreLogs = [],
@@ -83,6 +93,9 @@ export class EventSignal implements Signal {
       pollingInterval,
       ignoreLogs,
     }
+    this.crosscheckerParams = {
+      disabled: options?.disabled,
+    }
   }
 
   // TODO: should be wsProvider only?
@@ -114,6 +127,9 @@ export class EventSignal implements Signal {
   }
 
   async startCrossChecker(provider?: Providers) {
+    if (this.crosscheckerParams?.disabled)
+      return
+
     if (!this.crosscheckerOptions)
       return
     if (!provider)
diff --git a/packages/reku/package.json b/packages/reku/package.json
index d1a4883..5f917b8 100644
--- a/packages/reku/package.json
+++ b/packages/reku/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@ora-io/reku",
   "type": "module",
-  "version": "0.3.2",
+  "version": "0.3.3",
   "packageManager": "pnpm@8.10.5",
   "description": "",
   "author": "Norman (nom4dv3), MuRong",
diff --git a/packages/reku/src/provider/contract.ts b/packages/reku/src/provider/contract.ts
index 8fe956a..7c9bc76 100644
--- a/packages/reku/src/provider/contract.ts
+++ b/packages/reku/src/provider/contract.ts
@@ -1,6 +1,7 @@
 import type { ContractAddress, Fn } from '@ora-io/utils'
 import type { Interface, InterfaceAbi } from 'ethers'
 import { ethers } from 'ethers'
+import { debug } from '../debug'
 
 export class RekuContractManager {
   private _contract?: ethers.Contract
@@ -22,12 +23,14 @@ export class RekuContractManager {
     if (!this._listeners.has(event)) {
       this._listeners.set(event, listener)
       this._contract?.on(event, listener)
+      debug('add listener %s %s', this.address, event)
     }
   }
 
   removeListener(event: ethers.ContractEventName, listener: ethers.Listener) {
     this._contract?.removeListener(event, listener)
     this._listeners.delete(event)
+    debug('remove listener %s %s', this.address, event)
   }
 
   removeAllListeners() {
diff --git a/packages/reku/src/provider/provider.ts b/packages/reku/src/provider/provider.ts
index 1986077..b105acc 100644
--- a/packages/reku/src/provider/provider.ts
+++ b/packages/reku/src/provider/provider.ts
@@ -64,11 +64,13 @@ export class RekuProviderManager {
 
         const contract = new RekuContractManager(address, abi, this._provider)
         this._contracts.set(address, contract)
+        debug('add contract %s', address)
         return contract
       }
       else if (abi instanceof ethers.Contract) {
         const contract = new RekuContractManager(address, abi.interface, this._provider)
         this._contracts.set(address, contract)
+        debug('add contract %s', address)
         return contract
       }
       else {
@@ -87,6 +89,7 @@ export class RekuProviderManager {
   }
 
   removeAllListeners() {
+    debug('remove all listeners')
     this._provider?.removeAllListeners()
     this._contracts.forEach((contract) => {
       contract.removeAllListeners()
@@ -94,6 +97,7 @@ export class RekuProviderManager {
   }
 
   removeAllContract() {
+    debug('remove all contracts')
     this._contracts.forEach((contract) => {
       contract.removeAllListeners()
     })
@@ -101,6 +105,7 @@ export class RekuProviderManager {
   }
 
   retryAllListeners() {
+    debug('retry all listeners')
     this._contracts.forEach((contract) => {
       contract.retryAllListeners()
     })
@@ -110,6 +115,7 @@ export class RekuProviderManager {
     if (!this._event)
       this._event = new EventEmitter()
 
+    debug('on %s', event)
     this._event?.on(event, listener)
   }
 
@@ -117,14 +123,17 @@ export class RekuProviderManager {
     if (!this._event)
       this._event = new EventEmitter()
 
+    debug('once %s', event)
     this._event?.once(event, listener)
   }
 
   removeEvent(event: RekuProviderManagerEvent, listener: (...args: any[]) => void) {
+    debug('remove event %s', event)
     this._event?.removeListener(event, listener)
   }
 
   removeAllEvents() {
+    debug('remove all events')
     this._event?.removeAllListeners()
   }
 
@@ -185,6 +194,7 @@ export class RekuProviderManager {
         .catch((err) => {
           this.reconnect()
           this._event?.emit('error', err)
+          debug('heartbeat error: %s', err)
         })
     }, this._heartbeatInterval)
   }