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World Chain World Chain is an OP Stack Layer 2 rollup built to prioritize verified humans onchain, with World ID identity, ETH as the native gas token, and Ethereum-secured settlement through the Optimism Superchain.
World Chain Mainnet is an OP Stack Layer 2 running an op-reth execution client with standard Ethereum JSON-RPC, archive access, and full debug_* and trace_* namespace support. WebSocket subscriptions are available for real-time event streams.
World Chain is designed for human-first onchain applications: proof-of-humanness integrations, sybil-resistant rewards, gated participation, and consumer apps targeting real users at scale. World ID’s onchain zero-knowledge credential lets developers gate app access to verified humans, while the network itself grants them priority blockspace and gas subsidies.
| Consensus | OP Stack optimistic rollup secured by Ethereum. Sequencer produces L2 blocks, and state roots are posted to Ethereum with a challenge period. World Chain is part of the Optimism Superchain and inherits its shared security model. |
| Public / Private / Permissioned | Public and permissionless for users and developers. Sequencing is currently permissioned as part of the Superchain roadmap toward decentralized sequencing. |
| Smart contracts | Yes |
| Smart contract language(s) supported | Solidity; EVM-compatible (fully compatible with Optimism/OP Stack contracts) |
| Transaction privacy | World ID uses zero-knowledge proofs so users can prove uniqueness anonymously, but transaction data itself remains public. |
| Transaction visibility | Public by default. Transactions, contract state, and event logs are queryable through public RPC endpoints and Worldscan (worldscan.org). |
| Transaction ordering | The sequencer orders transactions with priority given to World ID-verified users, who receive priority blockspace and partial gas subsidies over unverified traffic. Standard priority-fee mechanics apply for non-priority transactions. |
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