diff --git a/clients/js/src/calldatapublickey.ts b/clients/js/src/calldatapublickey.ts
index f638154f..5f3d2f4c 100644
--- a/clients/js/src/calldatapublickey.ts
+++ b/clients/js/src/calldatapublickey.ts
@@ -182,10 +182,10 @@ export abstract class AbstractKeyFetcher {
 export class KeyFetcher extends AbstractKeyFetcher {
   readonly timeoutMilliseconds: number;
   public pubkey?: CallDataPublicKey;
-  #isBackgroundRunning = false;
+  #isBackgroundRunning?: ReturnType<typeof setTimeout>;
 
   get isBackgroundRunning(): boolean {
-    return this.#isBackgroundRunning;
+    return this.#isBackgroundRunning !== undefined;
   }
 
   constructor(in_timeoutMilliseconds?: number) {
@@ -232,22 +232,24 @@ export class KeyFetcher extends AbstractKeyFetcher {
   }
 
   public stopBackground() {
-    this.#isBackgroundRunning = false;
+    if (this.#isBackgroundRunning) {
+      clearTimeout(this.#isBackgroundRunning);
+      this.#isBackgroundRunning = undefined;
+      return true;
+    }
+    return false;
   }
 
-  public async runInBackground(upstream: UpstreamProvider) {
+  public runInBackground(upstream: UpstreamProvider) {
     if (this.#isBackgroundRunning) return;
 
     // Reduce wait time by 10%, so it eagerly fetches
     const waitMilliseconds =
       this.timeoutMilliseconds - this.timeoutMilliseconds / 10;
 
-    while (this.#isBackgroundRunning) {
-      await new Promise((resolve) =>
-        setTimeout(resolve, this.timeoutMilliseconds),
-      );
+    this.#isBackgroundRunning = setTimeout(async () => {
       await this.fetch(upstream, waitMilliseconds);
-    }
+    }, waitMilliseconds);
   }
 }
 
diff --git a/clients/js/src/compat.ts b/clients/js/src/compat.ts
index 81fa799b..e6da658f 100644
--- a/clients/js/src/compat.ts
+++ b/clients/js/src/compat.ts
@@ -82,8 +82,8 @@ export function wrap<U extends Ethers5Signer>(
   options?: SapphireWrapOptions,
 ): U & SapphireAnnex; // Ethers signers
 
-export function wrap<U extends string>(
-  upstream: U,
+export function wrap(
+  upstream: string,
   options?: SapphireWrapOptions,
 ): Ethers5Provider & EIP1193Provider & SapphireAnnex; // Gateway URL
 
diff --git a/examples/hardhat-viem/contracts/Example.sol b/examples/hardhat-viem/contracts/Example.sol
index ec9f9006..01298cfb 100644
--- a/examples/hardhat-viem/contracts/Example.sol
+++ b/examples/hardhat-viem/contracts/Example.sol
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: UNLICENSED
+// SPDX-License-Identifier: Apache-2.0
 pragma solidity ^0.8.0;
 
 contract Example {
diff --git a/examples/hardhat-viem/package.json b/examples/hardhat-viem/package.json
index 7e16a993..8799c176 100644
--- a/examples/hardhat-viem/package.json
+++ b/examples/hardhat-viem/package.json
@@ -6,7 +6,7 @@
     "scripts": {},
     "keywords": [],
     "author": "",
-    "license": "UNLICENSED",
+    "license": "Apache-2.0",
     "dependencies": {
         "@nomicfoundation/hardhat-toolbox-viem": "3.x",
         "@nomicfoundation/hardhat-viem": "2.x",
diff --git a/examples/wagmi-v2/package.json b/examples/wagmi-v2/package.json
index 7cbc335d..e99641ac 100644
--- a/examples/wagmi-v2/package.json
+++ b/examples/wagmi-v2/package.json
@@ -3,6 +3,7 @@
 	"private": true,
 	"version": "0.0.0",
 	"type": "module",
+	"license": "Apache-2.0",
 	"scripts": {
 		"dev": "vite",
 		"build": "tsc && vite build",
diff --git a/examples/wagmi-v2/src/App.tsx b/examples/wagmi-v2/src/App.tsx
index 54f0896d..eab1fd1e 100644
--- a/examples/wagmi-v2/src/App.tsx
+++ b/examples/wagmi-v2/src/App.tsx
@@ -10,7 +10,7 @@ import {
 import type { Abi } from "abitype";
 
 /*
-// SPDX-License-Identifier: UNLICENSED
+// SPDX-License-Identifier: Apache-2.0
 pragma solidity >=0.8.2 <0.9.0;
 contract Storage {
     uint256 number;
diff --git a/examples/wagmi-v2/src/wagmi.ts b/examples/wagmi-v2/src/wagmi.ts
index 973f4faf..944d51e2 100644
--- a/examples/wagmi-v2/src/wagmi.ts
+++ b/examples/wagmi-v2/src/wagmi.ts
@@ -1,6 +1,10 @@
 import { createConfig } from "wagmi";
 import { sapphire, sapphireTestnet } from "wagmi/chains";
-import { injectedWithSapphire, sapphireTransport, sapphireLocalnet } from "@oasisprotocol/sapphire-wagmi-v2";
+import {
+	injectedWithSapphire,
+	sapphireTransport,
+	sapphireLocalnet,
+} from "@oasisprotocol/sapphire-wagmi-v2";
 
 export const config = createConfig({
 	multiInjectedProviderDiscovery: false,