Documentation Index
Fetch the complete documentation index at: https://kleros-mintlify-changelog-2026-05-12-1778458371.mintlify.app/llms.txt
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Court V1 (Legacy)
Kleros Court V1 was the original decentralized dispute resolution protocol deployed on Ethereum Mainnet in 2018. The core smart contract was KlerosLiquid, which combined juror staking, random selection, voting, and dispute management in a single contract.Key Characteristics
- Network: Ethereum Mainnet (also deployed on Gnosis Chain / xDAI)
- Contract: KlerosLiquid (monolithic all logic in one contract)
- PNK Staking: PNK remained in the juror’s wallet during staking
- RNG: Blockhash-based random number generation
- Voting: Commit-reveal with plurality aggregation
- Standards: ERC-792 (Arbitration) and ERC-1497 (Evidence)
- Courts: Hierarchical subcourt tree with General Court as root
V1 vs V2 Comparison
| Feature | V1 | V2 |
|---|---|---|
| Network | Ethereum Mainnet | Arbitrum One |
| Architecture | Monolithic (KlerosLiquid) | Modular (KlerosCore + SortitionModule + DisputeKits) |
| Evidence | Handled by arbitrable contracts | Handled by Court |
| Appeals | Handled by arbitrable contracts | Handled by Court |
| RNG | Blockhash | Chainlink VRF with fallback |
| Cross-chain | Single chain | Multi-chain via VEA bridge |
| Gas costs | High | Low |
V1 Court Structure
V1 had a similar hierarchical court tree to V2, with the General Court as root and specialized subcourts including Blockchain Non-Technical, English Language, Onboarding, and others. Staking in a child court automatically included the juror in all parent courts.V1 Resources
- V1 Court App: Previously at court.kleros.io (now redirects to V2)
- Contract: KlerosLiquid on Ethereum Mainnet
- ERC-792 Standard: See ERC-792 documentation
- Migration: See Migration Guide