Sending Ethereum from a Node.js program comes down to four things: two addresses, some test ETH, a connection to an Ethereum node, and a signed transaction. This tutorial walks through each one on the Sepolia test network using ethers, the…
Connecting to the Ethereum network is the first step of any blockchain project in Node.js. Your code never talks to the chain directly. It talks to an Ethereum node over JSON-RPC, and Web3.js is the library that handles that conversation…
Token based authentication lets a Node.js API verify each request from a signed string instead of server-side sessions, and I ran the complete flow in this tutorial on Node v26.7.0 with Express 5.2.1, jsonwebtoken 9.0.3, bcryptjs 3.0.3, and RethinkDB 2.4.4,…
Customers tell you what is working and what is broken long before your dashboards do. A customer feedback management system collects that input from every channel, organizes it, and turns it into product and service decisions you can act on.…
The Oasis Bloom Hackathon was a $200,000 online hackathon run by the Oasis Network on the Devpost platform from March 10 to May 2, 2022, with support from Jump Crypto, Newman Capital, Neo Global Capital, and Hashed. It challenged developers…
Crypto scammers use fake websites that look exactly like Coinbase, MetaMask, or Kraken to steal wallets and credentials. The clones rank in Google search results, run convincing live-chat “support,” and trick even careful users into handing over seed phrases or…
Verida Alpha Protocol introduced a privacy-focused application stack built around user-controlled identity, encrypted data, and QR-based authorization. The useful question for a Web3 developer is no longer whether the Alpha release is live, but which parts became the Verida SDK…
After checking each official application page on August 23, 2026, I kept five blockchain hackathons that were accepting participants and compared their dates, format, focus, and planning demands. Quick comparison of the five hackathons Start with format and timing. An…
A JWT refresh token flow should keep access tokens short-lived without turning the refresh credential into a reusable master key, and I ran the complete Node.js authentication path on Node.js 26.7.0 with rotation, reuse detection, and token-family revocation so you…
Bitcoin is a peer-to-peer payment network that records confirmed transfers on a public ledger called the blockchain, where a transaction moves control of previously received amounts to new spending conditions before nodes verify it and a miner can include it…
