Introduction
Carbonized is a carbon-credit marketplace on EVM chains, deployed to Robinhood Chain Testnet and being prepared for Robinhood Chain mainnet.
Carbonized lets companies and traders trade, auction and retire tokenized carbon credits onchain. Each credit is an ERC-721 NFT created by an authorized issuer and carrying project metadata; credits can be wrapped 1:1 by tonnes of CO2 into ERC-20 tokens that trade on a marketplace combining an order book, timed auctions and an AMM pool (the AMM is not wired into the web app yet).
Unaudited software
The contracts have not been audited by an independent firm. The public deployment runs on Robinhood Chain Testnet (chain id 46630) with a mock payment token and a mock Chainlink Functions router. Robinhood Chain mainnet (chain id 4663, real 6-decimal payment token) is being prepared: see Robinhood Chain Mainnet. The app shows a "Testnet / unaudited" banner on every build that is not configured for mainnet. A credit in Carbonized is a token issued by an authorized issuer; a retirement certificate proves a token was burned, not that the underlying project is real.
What is in the box
| Layer | What it is |
|---|---|
| Smart contracts | CarbonCreditNFT, CarbonCreditToken, CarbonMarketplace, CarbonRegistry, CarbonPriceOracle, EmissionVerifier, RegistrySync (Solidity 0.8.20, OpenZeppelin 4.9, Chainlink Functions client) |
| Web app | Standalone app at /app with its own dashboard layout and an EN / 中文 language toggle: dashboard, marketplace, auctions, portfolio, sell credits, certificates, credit requests, company and trader onboarding. The marketing site lives at /. |
| Wallet | Reown AppKit (WalletConnect) plus injected wallets such as MetaMask |
| Backend (optional) | An HTTP API at NEXT_PUBLIC_BACKEND_URL for an off-chain depository. Leave it empty unless you run one: it receives company registration details. |
Where to start
Quickstart
Run the web app and connect a wallet in minutes.
Architecture
How the contracts and the app fit together.
Deploy to Robinhood Mainnet
Prerequisites, multisig handover and the launch checklist.
Deploy to Robinhood Testnet
Compile, deploy and wire the frontend.
Connect a wallet
Reown AppKit setup and network details.
Smart contracts
Roles, functions, events and ABIs.
Using the app
Page-by-page guide and step-by-step tutorials.
Become an issuer
Issuer onboarding policy, evidence, serial rules and trust model.
FAQ
Short answers about tokens, fees, testnet and limits.
Roadmap and limitations
What is not built yet.