The problem Cheqq solves

Cheqq solves the fragmented and expensive experience of managing global payments for businesses and freelancers:

For Businesses:

• Cross-border payroll is slow and expensive (3-5 day delays, 3-7% fees)
• Treasury sits idle earning no yield
• Managing employee advances requires separate systems

For Freelancers:

• Getting paid in crypto is complicated
• Converting to fiat involves multiple steps and high fees
• Payment tracking is fragmented across platforms

Cheqq unifies all this on Base:

• Instant settlements (<1 second) with zero transaction fees
• Treasury yield through DeFi integration (Morpho/Aerodrome) earning 4-8% APY
• Employee lending collateralized by future payroll
• One-click invoicing with payment links supporting USDC/IDRX
• Bank withdrawals for freelancers to off-ramp earnings

Challenges we ran into

1. Wallet Provider Conflicts: Integrating Privy with OnchainKit and wagmi caused connector conflicts. Solved by creating separate wagmi configs for Privy-enabled vs fallback scenarios.

2. React 19 Compatibility: Many dependencies (use-sync-external-store, valtio) had peer dependency conflicts with React 19. Resolved by using npm's --legacy-peer-deps and careful version pinning.

3. Base Mini App Integration: The MiniApp SDK documentation was sparse. Had to carefully implement sdk.actions.ready() in a client-side provider to signal app readiness.

4. Multi-Currency Support: Handling both USDC and IDRX with different decimal places required careful normalization across the invoice and payroll flows.

5. Supabase RLS Policies: Implementing Row Level Security for KYC documents while allowing service_role uploads required debugging edge cases with storage policies.