This tutorial walks you through installing geth, synchronizing the Rinkeby testnet, creating accounts, writing and compiling Solidity contracts, deploying an ERC20 token, and performing common operations such as balance queries, transfers, approvals, and delegated transfers using the console and web3.js.
The article explains the so‑called “jaeden” flaw in the ERC‑20 approve function, illustrates how transaction ordering can lead to double‑spending attacks, and offers two practical mitigation strategies for developers to write safer token contracts.
This step‑by‑step guide shows how to set up a Mac development environment, create a Truffle project, install OpenZeppelin, write and compile a simple ERC20 token contract, deploy it to a Ganache private Ethereum network, and interact with it via MetaMask.
This article guides developers through extending a simple Ethereum voting DApp by introducing ERC20 token-based weighted voting, covering token concepts, Solidity contract design with structs and mappings, functions for buying tokens, voting, and fund transfer, as well as deployment, testing, and front‑end integration steps.
