2022-01-28
2133
#blockchain#node#react
Zafar Saleem
89188
Jan 28, 2022 â‹… 7 min read

Interact with smart contracts via React and a Node.js API

Zafar Saleem I've worked as a developer on projects spanning from small-scale websites to large-scale applications both in small and large companies.

Recent posts:

designing llm first products

Designing LLM-first products, not just features

Everyone’s building chat-first AI products. And most of them suck. Here’s how to break the mold and ship LLM-native software that actually solves problems.

Rosario De Chiara
May 30, 2025 â‹… 4 min read
Build A React AI Image Generator With Hugging Face Diffusers

Build a React AI image generator with Hugging Face Diffusers

Build a React-based AI image generator app offline using the Hugging Face Diffusers library and Stable Diffusion XL.

Andrew Baisden
May 29, 2025 â‹… 10 min read
Gemini 2.5 and the future of AI reasoning for frontend devs

Gemini 2.5 and the future of AI reasoning for frontend devs

Get up to speed on Google’s latest breakthrough with the Gemini 2.5 model and what it means for the future of frontend AI tools.

Chizaram Ken
May 29, 2025 â‹… 5 min read
Exploring The Top Rust Web Frameworks

Exploring the top Rust web frameworks

In this article, we’ll explore the best Rust frameworks for web development, including Actix Web, Rocket, Axum, warp, Leptos, Cot, and Loco.

Abiodun Solomon
May 28, 2025 â‹… 11 min read
View all posts

8 Replies to "Interact with smart contracts via React and a Node.js API"

  1. getting error

    Error: Returned values aren’t valid, did it run Out of Gas? You might also see this error if you are not using the correct ABI
    for the contract you are retrieving data from, requesting data from a block number that does not exist, or querying a node which is not fully synced.
    at ABICoder.decodeParametersWith

    1. Please check if you are using the correct ABI from the smart contract and secondly check if you have enough Gas in your Metamask Wallet.

  2. You are supposed to use correct ABI. Please check that. Secondly, check do you have enough Gas in your Metamask wallet.

  3. Hi Zafar, I’m trying to run the server.js, I don’t have express or web3 or mongoDB, do I need more? I’m trying to install those like npm install express and I get this error:

    npm ERR! code EINVALIDPACKAGENAME
    npm ERR! Invalid package name “.pnpm”: name cannot start with a period

  4. Excellent article.

    The nodemon server.js command does not run and the error below appears. I did exactly as in the tutorial and copied exactly the same codes.

    Also, running “yarn start” it opens “http://localhost:3000/” with no information, blank page.

    Detail: the contract was implemented and its address correctly changed in the code.


    PS D:\MyDocs\Cripto\Scripts\frontend-to-contract\blockchain-node-api> nodemon server.js
    [nodemon] 2.0.19
    [nodemon] to restart at any time, enter `rs`
    [nodemon] watching path(s): *.*
    [nodemon] watching extensions: js,mjs,json
    [nodemon] starting `node server.js`
    internal/modules/cjs/loader.js:905
    throw err;
    ^

    Error: Cannot find module ‘express’
    Require stack:
    – D:\MyDocs\Cripto\Scripts\frontend-to-contract\blockchain-node-api\server.js
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:902:15)
    at Function.Module._load (internal/modules/cjs/loader.js:746:27)
    at Module.require (internal/modules/cjs/loader.js:974:19)
    at require (internal/modules/cjs/helpers.js:93:18)
    at Object. (D:\MyDocs\Cripto\Scripts\frontend-to-contract\blockchain-node-api\server.js:1:17)
    at Module._compile (internal/modules/cjs/loader.js:1085:14)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1114:10)
    at Module.load (internal/modules/cjs/loader.js:950:32)
    at Function.Module._load (internal/modules/cjs/loader.js:790:12)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:76:12) {
    code: ‘MODULE_NOT_FOUND’,
    requireStack: [
    ‘D:\\MyDocs\\Cripto\\Scripts\\frontend-to-contract\\blockchain-node-api\\server.js’
    ]
    }
    [nodemon] app crashed – waiting for file changes before starting…

Leave a Reply