Architecture

Users / Wallets (EOA · Reown Smart Account · Coinbase Smart Wallet)
        │
        ▼
nft.cinachain.com  (Cloudflare Pages — Next.js static export)
        │
        ├── rpc / ipfs / cdn / meta .cinachain.com   (Cloudflare Web3 gateways)
        ├── whitelist-api.cinachain.com              (whitelist verification)
        ├── billing-api.cinachain.com                (metering + credits)
        ├── paymaster-api.cinachain.com              (gasless mint proxy)
        └── media.cinachain.com                      (CinaMega media: R2 → 4EVERLAND → on-chain)

Contracts (Base Sepolia)

Contract	Standard	Address	Purpose
CinaNFT	ERC-721	0x9178c3dd...	Main NFT collection
CinaBadge	ERC-1155	0x72cc9adb...	Badges / tiers
CinaCredit	ERC-20	0x78f5aebc...	Billing credits
CinaMega	ERC-1155	0x3443febc...	Mega-collections + exchange

Wallet Layer

Reown AppKit 1.8 (wagmi 3 / viem 2) with three account paths:

• EOA (MetaMask / WalletConnect): plain transactions, user pays gas
• Coinbase Smart Wallet: EIP-5792 sendCalls + paymaster capability (gasless)
• Reown Smart Account (email/social): UserOps routed through the Reown cloud iframe (gasless)

SIWE verification supports EOA, EIP-1271 and EIP-6492 (smart accounts) via viem/actions verifyMessage.

Storage

CinaMega assets follow a four-layer fallback: R2 → 4EVERLAND gateway → on-chain SVG → 503. Template SVGs + immutable IPFS CIDs are stored on-chain (locked permanently after initialization).