Web3 dApp Development for Production Launch

Our default stack: Next.js 14 (App Router) for the framework, wagmi v2 + viem for Ethereum interactions (type-safe, excellent hooks), RainbowKit for wallet connection UI, The Graph for indexed data, and TanStack Query for caching and synchronization. For Solana: @solana/web3.js with @solana/wallet-adapter. This stack is battle-tested across hundreds of production dApps and handles the peculiarities of blockchain state (pending transactions, reorgs, RPC reliability) gracefully.

Blockchain state management has unique challenges: transactions are async and can be pending for minutes, state can revert, and multiple data sources (RPC, subgraph, off-chain API) need synchronization. We use wagmi's built-in hooks for contract reads/writes with automatic refetching, TanStack Query for caching on-chain data with appropriate stale times, and optimistic updates for actions the user initiates. Transaction state is tracked with pending/success/error toasts and a transaction history component.

On-chain storage is expensive (~20,000 gas per 32 bytes on Ethereum) but trustless and permanent. Use it for: ownership records, financial balances, governance votes, and data that must be verifiable without trusting a third party. Off-chain storage (IPFS, Arweave, traditional databases) is orders of magnitude cheaper and should be used for: content, metadata, user preferences, analytics, and large files. A common pattern is storing a content hash on-chain that verifiably points to off-chain data.

Direct RPC calls for historical data are slow and expensive — you'd need to scan every block to find past events. The Graph Protocol lets you define a subgraph (GraphQL schema + mappings) that automatically indexes your smart contract events into a queryable database. Queries that would take minutes over RPC return in milliseconds. We write custom subgraphs for your contracts and deploy to The Graph's decentralized network or a self-hosted Graph Node for cost control.

Chain switching is a core UX challenge in multi-chain dApps. We implement: automatic chain detection on wallet connect, network-aware component rendering (showing the right balances and features per chain), prompted network switching when users attempt actions on the wrong chain, and graceful degradation for unsupported networks. With wagmi, chain configuration is declarative — you define supported chains once and all hooks automatically scope to the current chain. We also implement URL-based chain routing for bookmarkable chain-specific views.