scaffold-eth

Add a PostgreSQL database with Drizzle ORM to a Scaffold-ETH 2 project. Use when the user wants to: add a database, use Drizzle ORM, integrate Neon PostgreSQL, store off-chain data, build a backend with database, or add persistent storage to their dApp.

Add EIP-5792 batched transaction support to a Scaffold-ETH 2 project. Use when the user wants to: batch multiple contract calls, use wallet_sendCalls, add EIP-5792 wallet integration, batch onchain transactions, or use wagmi's experimental batch hooks.

Integrate Ponder into a Scaffold-ETH 2 project for blockchain event indexing. Use when the user wants to: index contract events, add a blockchain backend, set up GraphQL for onchain data, use Ponder with SE-2, or build an indexer for their dApp.

Integrate The Graph subgraph into a Scaffold-ETH 2 project for indexing blockchain events. Use when the user wants to: index contract events with The Graph, add a subgraph, query onchain data with GraphQL, set up a local graph node, or deploy a subgraph to Subgraph Studio.

Add x402 payment-gated routes to a Scaffold-ETH 2 project. Use when the user wants to: monetize an API with micropayments, add HTTP 402 payment required to routes, gate content behind crypto payments, implement pay-per-call APIs, or integrate the x402 protocol.

Add an ERC-721 NFT contract to a Scaffold-ETH 2 project. Use when the user wants to: create an NFT collection, deploy an ERC-721, add NFT minting, build an NFT gallery or transfer UI, or work with non-fungible tokens in SE-2.

Develop smart contracts using OpenZeppelin Contracts library. Use when the user wants to create or modify Solidity contracts that use OpenZeppelin — including token standards (ERC20, ERC721, ERC1155), access control (Ownable, AccessControl), security primitives (Pausable, ReentrancyGuard), or any OZ extension. Covers library-first integration, pattern discovery from installed source, and version-safe development.

Add Sign-In with Ethereum (SIWE) authentication to a Scaffold-ETH 2 project. Use when the user wants to: add wallet-based login, implement SIWE, authenticate users with their Ethereum wallet, add session management with wallet signing, build sign-in with Ethereum, or add Web3 authentication.

Scaffold and build Ethereum dApps using create-eth (Scaffold-ETH 2). Use when the user wants to: build an Ethereum app, create a dApp, start a web3 project, use Scaffold-ETH or create-eth, build something onchain, deploy a smart contract, deploy a smart contract with a frontend, or scaffold a full-stack blockchain application.

Add scaffold-ui's React components and hooks (Address, Balance, useAddress, useAddressInput and etc) to a Next.js or React dApp that already uses wagmi. Use this skill whenever the user wants to display Ethereum addresses, build address or ETH amount input fields with validation, show wallet balances with USD price conversion, add the scaffold-eth contract debugger UI to a non scaffold-eth-2 project. Also use when the user mentions scaffold-ui, @scaffold-ui/components, @scaffold-ui/hooks, or @scaffold-ui/debug-contracts by name even if they don't explicitly ask to install. This skill covers install gotchas, peer-dep ordering, provider wrapping order, the styles.css import, and the chain defaulting rule.