W3Gig

Smart contract security: ReentrancyGuard prevents reentrancy attacks on deposit() and approveMilestone(), Ownable pattern for access control with only client allowed to deposit and only arbitrator for disputes

Checks-effects-interactions pattern critical in Solidity: validate inputs first (checks), update state variables (effects), then perform external calls (interactions) - prevents state inconsistencies

Supabase Auth integration: auth.users.id as primary key in users table, post-signup hooks to sync, middleware for session management, JWT token handling with @supabase/ssr

Separation of concerns: AuthService for Supabase auth operations only, UserService for database CRUD, GigService for gig management - clear boundaries prevent coupling

React Server Components architecture: 90/10 split with most components RSC, only forms/modals/real-time features as client components - data fetching in server components reduces client JS bundle

Wallet security critical: AES-256 encryption with CryptoJS before storage, environment variable for encryption key, never log or expose private keys, optional export for external wallets

Database performance: Strategic indexing on foreign keys (client_id, freelancer_id, gig_id, contract_id) and frequently filtered columns (email, wallet_address, status, created_at, reputation_score, budget_range)

Type safety across layers: Drizzle generates TypeScript types from schema automatically, Zod validation at action layer prevents invalid data, shared type definitions ensure consistency

Smart contract gas optimization: using uint8 for status enums (ACTIVE=0, COMPLETED=1, DISPUTED=2, CANCELLED=3), packed structs where possible, minimal state updates, efficient payment transfers with .call.value()

Service + Actions pattern: Services handle pure business logic with direct Drizzle ORM, Actions handle validation/auth/orchestration, consistent {success, data?, error?} response format

Ethereum wallet generation: ethers.Wallet.createRandom() generates wallet with private key, encrypt before storage with CryptoJS.AES.encrypt(), decrypt on-demand for transactions

Milestone-based payments: uint256[] public milestones stores amounts, uint256 public currentMilestone tracks progress, sequential approval required, automatic completion detection when currentMilestone == milestones.length

Dispute resolution mechanism: Either party can call raiseDispute() when contract_status == ACTIVE, arbitrator can resolveDispute() by setting winner (client or freelancer), emergencyCancel() can cancel and refund

Row Level Security essential: Users can only SELECT/UPDATE their own row (user_id = auth.uid()), contract participants can only see their contracts (client_id OR freelancer_id = auth.uid())

Real-time messaging with Supabase Realtime subscriptions

Advanced search with Algolia or Elasticsearch

Mobile app (React Native) for on-the-go management

Email notifications for important events

Payment confirmation via blockchain listeners

NFT-based service certificates for completed projects

Multi-chain support (Polygon, Arbitrum) for lower gas costs

DAO governance for platform decisions

Analytics dashboard for users

Video calling integration

AI-powered gig matching

Cryptocurrency payment options beyond ETH

Reputation token system