如何将ethabi-js NPM包引入Tampermonkey脚本以解析ABI数据？

Great question! Tampermonkey scripts run in the browser context, so you can't directly install and use NPM packages like you would in a Node.js project. But there are two reliable ways to get ethabi-js working in your Etherscan parser script:

Method 1: Load ethabi-js via a CDN (Simplest Approach) #

Most modern NPM packages offer browser-compatible builds (usually UMD or IIFE format) on public CDNs. This is the fastest way to add the library to your Tampermonkey script:

1. Grab the CDN link for ethabi-js
   Use a CDN like unpkg to get the minified, browser-ready version. For the latest release, the link is:

   https://unpkg.com/ethabi-js@latest/dist/ethabi.min.js
   

   (Double-check the package's NPM page to confirm the dist folder path if this link breaks in the future.)

2. Add the link to your Tampermonkey metadata
   Use Tampermonkey's // @require directive to load the library before your script runs. This ensures the ethabi global object is available when your code executes.

3. Use ethabi-js in your script
   Once loaded, you can call the library's methods directly. Here's a full example script:

// ==UserScript==
// @name         Etherscan ABI Parser (ethabi-js Edition)
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Parse and decode ABI data from Etherscan using ethabi-js
// @author       Your Name
// @match        https://etherscan.io/*
// @require      https://unpkg.com/ethabi-js@latest/dist/ethabi.min.js
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    // Example workflow: Extract ABI and encoded data from Etherscan, then decode
    function decodeABI(abiArray, encodedData) {
        try {
            const decodedResult = ethabi.decode(abiArray, encodedData);
            console.log('Decoded ABI Data:', decodedResult);
            // Add your logic to display the decoded data on the Etherscan page here
        } catch (err) {
            console.error('Failed to decode ABI:', err);
        }
    }

    // Hook into Etherscan's page load to run your parsing logic
    window.addEventListener('load', () => {
        // Replace this with your code to extract ABI and encoded data from the page
        const sampleABI = [/* Extracted ABI array from Etherscan */];
        const sampleEncodedData = '0x...'; // Extracted encoded transaction data
        decodeABI(sampleABI, sampleEncodedData);
    });
})();

Method 2: Self-Host a Custom Build (For Advanced Use Cases) #

If the CDN build doesn't suit your needs (e.g., you need a modified version of the library), you can package ethabi-js yourself:

• Clone the ethabi-js repository to your local machine.
• Install dependencies with npm install.
• Modify the build configuration (check the repo's package.json for scripts) to output a UMD/IIFE bundle (browser-compatible format).
• Run the build command (e.g., npm run build) to generate a minified .js file.
• Host the file on a service like GitHub Gist, your own server, or a static file CDN.
• Use the hosted URL in your Tampermonkey script's // @require directive, just like the CDN method.

Key Notes #

• Always use HTTPS links for // @require—Tampermonkey blocks HTTP resources for security.
• Test the CDN/hosted link in your browser first to confirm it loads without errors.
• Refer to ethabi-js's documentation for exact method signatures (like decode, encode, etc.) to match your parsing needs.

内容的提问来源于stack exchange，提问作者Devedse