Smart contract
Self-executing code on a distributed ledger that enforces agreed rules without an intermediary.
A smart contract encodes rules that execute automatically when conditions are met. In carbon markets it can govern issuance against a verification attestation, enforce a retirement on payment, or split revenue between beneficiaries according to fixed shares.
The attraction is determinism and transparency: the same input produces the same result for everyone, and the logic is inspectable. This reduces the discretionary control that intermediaries exercise over transfers.
The risk is that code is unforgiving. Bugs become irreversible losses, and oracle inputs can be manipulated or wrong. Well-designed systems therefore restrict what the contract may do, add human checkpoints at high-value steps, and route disputed cases to an off-chain process rather than trying to encode every judgement.
Frequently asked questions
Can a smart contract verify carbon data itself?
No. It can only act on data supplied to it, which is why independent verification and trusted attestations remain necessary.
What happens if there is a bug?
Transactions already executed usually cannot be undone, which is why audits and upgrade controls matter before deployment.