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The Cryptonomics™ > Bitcoin > Webpack problem with tiny-secp256k1 and ECPair
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Webpack problem with tiny-secp256k1 and ECPair

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Last updated: July 7, 2025 7:07 pm
admin Published July 7, 2025
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Webpack problem with tiny-secp256k1 and ECPair


I’m creating a browser extension utilizing Webpack v5 and incorporating the bitcoinjs-lib and ecpair libraries to create a Bitcoin pockets. Nevertheless, I’m encountering an error when trying to load the WebAssembly module.

I’d significantly respect any steering or options on the right way to resolve this problem efficiently and instantiate the WebAssembly module in my browser extension.

Error Message:

Listed here are the important thing particulars of my setup:

  • I’m utilizing Webpack v5 to bundle the appliance.
  • I’ve included the bitcoinjs-lib and ecpair libraries as dependencies in my venture.
  • Error is happening when making an attempt to import tiny-secp256k1 and in addition when passing that occasion to ECPairFactory.

enter image description here

My webpack.config.js file:

const path = require("path");
const CopyPlugin = require("copy-webpack-plugin");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const { exec } = require("child_process");
const fs = require("fs");

perform copyFolderSync(from, to) {
  fs.mkdirSync(to, { recursive: true });
  fs.readdirSync(from).forEach((ingredient) => {
    if (ingredient !== "manifest.json") {
      if (fs.lstatSync(path.be a part of(from, ingredient)).isFile()) {
        fs.copyFileSync(path.be a part of(from, ingredient), path.be a part of(to, ingredient));
      } else {
        copyFolderSync(path.be a part of(from, ingredient), path.be a part of(to, ingredient));
      }
    }
  });
}

module.exports = {
  module: {
    guidelines: [
      {
        test: /.scss$/,
        use: ["style-loader", "css-loader", "sass-loader"],
      },
      {
        check: /.(js|jsx)$/,
        exclude: /node_modules/,
        use: {
          loader: "babel-loader",
          choices: {
            presets: ["@babel/preset-env", "@babel/preset-react"],
          },
        },
      },
      {
        check: /.wasm$/,
        sort: "webassembly/async", // or "webassembly/sync"
      },
    ],
  },
  experiments: {
    asyncWebAssembly: true,
  },
  resolve: {
    extensions: [".js", ".jsx"],
    fallback: {
      buffer: require.resolve("buffer"),
      stream: require.resolve("stream-browserify"),
    },
  },
  entry: {
    background: "./app/background.js",
    popup: "./app/popup.js",
  },
  output: {
    path: path.resolve(__dirname, "dist/chrome"),
    filename: "[name].js",
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: "./app/popup.html",
      filename: "popup.html",
      chunks: ["popup"],
    }),
    new CopyPlugin({
      patterns: [
        {
          from: "app",
          to: "",
          globOptions: {
            ignore: [
              "**/background.js",
              "**/popup.js",
              "**/popup.html",
              "**/build-types",
              "**/manifest",
            ],
          },
        },
        {
          from: "ui",
          to: "ui",
        },
      ],
    }),
    {
      apply: (compiler) => {
        compiler.hooks.afterEmit.faucet("AfterEmitPlugin", (compilation) => {
          // Run the JavaScript file after the compilation is completed
          exec("node improvement/construct/index.js", (error, stdout, stderr) => {
            if (error) {
              console.error(`exec error: ${error}`);
              return;
            }
            // Copy information from the temp folder to different folders
            fs.readdirSync(path.resolve(__dirname, "dist")).forEach((dest) => {
              copyFolderSync("dist/chrome", `dist/${dest}`);
            });
          });
        });
      },
    },
  ],
};



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