GreenLedger
Transparent, Verifiable Carbon Offset
About
The problem it solves GreenLedger addresses the lack of trust, transparency, and accessibility in the carbon credit market. - For Corporations & NGOs: Enables verifiable, on-chain purchase and tracking of carbon offsets, reducing the risk of greenwashing. - For Compliance Teams: Securely stores audit-ready certificates and compliance records in a decentralized vault (SealSafe), eliminating reliance on vulnerable centralised servers. - For non-crypto users, zkLogin is used to make blockchain onboarding as simple as logging in with Google or Microsoft without compromising privacy.
How it's made
Challenges we ran into - Hurdle: Managing session security while transitioning from zkLogin authentication into blockchain transactions without confusing non-crypto users. - Solution: Designed a guided onboarding flow with progressive disclosure — users first see familiar login options, then are introduced to wallet creation in the background, making the transition seamless. - Another hurdle was optimising Seal & Walrus storage costs for document-heavy compliance requirements. - Solution: Implemented selective encryption & compression, storing only critical proofs on-chain and offloading larger encrypted files to Walrus for cost efficiency.