Trustless RWA Tokenisation

Demo

About

The problem it solves Carbon credit markets suffer from a lack of transparency, trust, and accessibility. Buyers often face risk of double-counting and unverifiable claims. Our project solves this by creating a trustless carbon credit issuance platform for the trustless issuance of on-chain real-world assets (RWAs), **powered by Chainlink Functions and Space and Time (SxT)**. Users seeking to offset carbon credits can: - Buy tokenized carbon credits backed by verified off-chain data from SxT - Burn tokens to offset emissions and receive certificates - Explore carbon credit metadata and project provenance for full transparency **Safe, Verified and Transparent On-Chain:** How it works: - Automates the verify → mint/burn pipeline using Chainlink Functions and SxT - Ensures credits are only minted or burned after trusted off-chain verification - Provides on-chain auditability and traceability for ESG compliance - Creates a data-to-value flow, turning real-world impact into on-chain financial instruments

How it's made

Challenges we ran into Our team has encountered several technical and conceptual hurdles during development. Understanding how Chainlink Functions and SxT integrate was a steep learning curve. **Smart Contract Bugs** - Challenge: Role assignment issues in OpenZeppelin upgradeable contracts post-deployment. Solution: Debugged locally using Anvil (Foundry) to fix permission logic. - Challenge: Callback failures in Chainlink Functions. Solution: Simplified the request structure for reliable execution. **Integration Hurdles** - Challenge: No direct Chainlink Functions for contract testing in Anvil. Solution: Simulated off-chain flows first before full on-chain testing. - Challenge: SxT free-tier query limitations. Solution: Optimized backend logic to minimise api calls. - Challenge: PostgreSQL and SxT data type mismatches & ABI encoding/decoding complexities. Solution: Referenced Chainlink & SxT docs to ensure correct data formatting. **Testing Strategy** - Unit-tested contracts with Anvil. - Deployed to Sepolia for end-to-end validation. - Studied Chainlink/SxT templates for security and data handling best practices.