diff --git a/src/config/evm-network.ts b/src/config/evm-network.ts
index 9ed860a..32523f1 100644
--- a/src/config/evm-network.ts
+++ b/src/config/evm-network.ts
@@ -93,8 +93,31 @@ const evmNetworks: Record<number, any> = {
         },
         contracts: { factory: "0x96f7849C6D0EB09024e482Cc9c249096e3368a16" },
     },
+    42170: {
+        name: "Arbitrum Nova",
+        nativeCurrency: {
+            name: "Ether",
+            symbol: "ETH",
+            decimals: 18,
+        },
+        rpc: ["https://nova.arbitrum.io/rpc"],
+        explorers: [
+            {
+                name: "Arbitrum Nova Chain Explorer",
+                url: "https://nova-explorer.arbitrum.io",
+                icon: "blockscout",
+                standard: "EIP3091",
+            },
+        ],
+        txConst: {
+            blockTimeSec: 3,
+            rbfTimes: 5,
+            boardcastTimes: 10,
+        },
+        contracts: { factory: "0x6B7315a594263A886e8DecE2FfCB7b37cab0941b" },
+    },
     421613: {
-        name: "Arbitrum - Goerli",
+        name: "Arbitrum Goerli",
         nativeCurrency: {
             name: "Arbitrum Ether",
             symbol: "ETH",
diff --git a/src/scripts/sync.ts b/src/scripts/sync.ts
index 2aff3eb..b58b491 100644
--- a/src/scripts/sync.ts
+++ b/src/scripts/sync.ts
@@ -39,6 +39,10 @@ function loadCache() {
                     start: 9623490,
                     last: 9623490,
                 },
+                42170: {
+                    start: 2699199,
+                    last: 2699199,
+                },
             },
             hubs: {},
             ns: {
diff --git a/src/storage/ETHStorage.ts b/src/storage/ETHStorage.ts
index 06e758b..81be0c1 100644
--- a/src/storage/ETHStorage.ts
+++ b/src/storage/ETHStorage.ts
@@ -2,6 +2,7 @@ import { Ref, Status, Storage } from "./storage.js"
 import { ethers } from "ethers"
 import { TxManager } from "../common/tx-manager.js"
 import { Git3Protocol } from "../common/git3-protocol.js"
+import { Retrier } from "../common/queue-task.js"
 
 export class ETHStorage implements Storage {
     repoName: string
@@ -21,12 +22,15 @@ export class ETHStorage implements Storage {
 
     async hasPermission(ref: string): Promise<boolean> {
         let sender = await this.wallet.getAddress()
-        let isMember = await this.contract.isRepoMembership(Buffer.from(this.repoName),sender)
+        let isMember = await this.contract.isRepoMembership(Buffer.from(this.repoName), sender)
         return isMember
     }
 
     async download(path: string): Promise<[Status, Buffer]> {
-        const res = await this.contract.download(Buffer.from(this.repoName), Buffer.from(path))
+        const res = await Retrier(
+            async () => await this.contract.download(Buffer.from(this.repoName), Buffer.from(path)),
+            { maxRetry: 10 }
+        )
         const buffer = Buffer.from(res[0].slice(2), "hex")
         console.error(`=== download file ${path} succeed ===`)
         return [Status.SUCCEED, buffer]
@@ -111,7 +115,10 @@ export class ETHStorage implements Storage {
     }
 
     async listRefs(): Promise<Ref[]> {
-        const res: string[][] = await this.contract.listRepoRefs(Buffer.from(this.repoName))
+        const res: string[][] = await Retrier(
+            async () => await this.contract.listRepoRefs(Buffer.from(this.repoName)),
+            { maxRetry: 3 }
+        )
         let refs = res.map((i) => ({
             ref: Buffer.from(i[1].slice(2), "hex")
                 .toString("utf8")
diff --git a/src/storage/SLIStorage.ts b/src/storage/SLIStorage.ts
index a30eaf8..971dc56 100644
--- a/src/storage/SLIStorage.ts
+++ b/src/storage/SLIStorage.ts
@@ -51,10 +51,9 @@ export class SLIStorage implements Storage {
         })
     }
 
-
     async hasPermission(ref: string): Promise<boolean> {
         let sender = await this.wallet.getAddress()
-        let isMember = await this.contract.isRepoMembership(Buffer.from(this.repoName),sender)
+        let isMember = await this.contract.isRepoMembership(Buffer.from(this.repoName), sender)
         return isMember
     }
 
@@ -173,7 +172,10 @@ export class SLIStorage implements Storage {
     }
 
     async listRefs(): Promise<Ref[]> {
-        const res: string[][] = await this.contract.listRepoRefs(Buffer.from(this.repoName))
+        const res: string[][] = await Retrier(
+            async () => await this.contract.listRepoRefs(Buffer.from(this.repoName)),
+            { maxRetry: 3 }
+        )
         let refs = res.map((i) => ({
             ref: Buffer.from(i[1].slice(2), "hex")
                 .toString("utf8")