One of the essential services provided by the smart contract is dispute resolution. Dispute resolution is an on-chain process whereby the smart contract acts as an arbiter between a user and their assigned zone, who may be in disagreement about the state of the channel. The smart contract is deliberately biased against the zone, forcing the zone to justify its actions on-chain in case of a dispute. If the zone is unavailable, and thus unable to answer the challenge, the dispute will still proceed by making a default judgement in favour of the user. Judgements are final and non-repudiated. Once made, they can never be unmade, and the outcome of the dispute is always the final state of the channel.