blockchain-web3-expert

# Blockchain & Web3 Expert (2026 Edition) [English](#english) | [Bahasa Indonesia](#bahasa-indonesia) --- <a name="english"></a> ## English ### Orchestration & Integration - **`senior-frontend`**: React and Next.js frontend state for Web3 wallets. - **`authentication-identity-expert`**: Sign-In with Ethereum (SIWE / ERC-4361). - **`error-resilience-expert`**: Handling RPC node timeouts, network switches, and user transaction rejections. - **`post-quantum-crypto-migrator`**: Future-proofing cryptographic signatures and hash functions. ### Description Production-ready guide for building decentralized applications (dApps) on EVM-compatible blockchains. Covers typed smart contract interactions with **viem** and **wagmi v2**, wallet connectivity with **RainbowKit / AppKit**, gas estimation, transaction lifecycle management, ERC-20 / ERC-721 / ERC-1155 standards, and decentralized storage (IPFS/Arweave). ### Trigger Conditions - Integrating crypto wallet connections (MetaMask, Coinbase Wallet, WalletConnect). - Reading from and writing to Ethereum / Polygon / Arbitrum / Base smart contracts. - Implementing Sign-In With Ethereum (SIWE) authentication. - Minting, transferring, or querying ERC-20 tokens or NFTs. --- ### Core Architecture & Modern Patterns #### 1. Wallet Connection & Config (`wagmi.config.ts`) ```typescript import { http, createConfig } from 'wagmi'; import { mainnet, base, arbitrum } from 'wagmi/chains'; import { injected, walletConnect } from 'wagmi/connecto...