> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.adid.dev/llms.txt.
> For full documentation content, see https://docs.adid.dev/llms-full.txt.

# ADI Blockchain Primer

ADI is a zkSync-Airbender-compatible Layer 2 with three networks:

| Network   | Chain ID | Use                                |
| --------- | -------- | ---------------------------------- |
| Mainnet   | `8400`   | Production identity anchoring      |
| Testnet   | `99999`  | Pre-production & QA                |
| Localhost | `31337`  | Local Hardhat node for development |

Gas is paid in ADI tokens; identity transactions are typically under 50,000 gas. The platform's five registries (DID, Schema, Revocation, AgentTrust, ZKProofVerifier) own all on-chain state.