> ## Documentation Index
> Fetch the complete documentation index at: https://docs.nullark.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Use one complete runtime

Keep Nullark's chain, pool, verifiers, fee controller, and proving files together as one checked runtime.

Nullark calls its complete configuration a runtime. It packages the chain ID, RPC, pool, deployment block, verifiers, adapters, bytecode hashes, fee policy, selectors, proving hashes, and proof-input order. Use it as a whole. Do not assemble those values one by one.

## Browser

Open [Nullark](https://nullark.com/?network=megaeth-testnet-nullark). The browser loads the selected runtime and checks its chain, contracts, fee, and proving files together. If any part disagrees, the flow stops.

Use [Current runtime](/reference/current-runtime.md) when you need the exact published values.

## Public integration status

Use the browser for the full Nullark app or install the [TypeScript SDK](/developers/sdk.md) in your own app. The CLI remains a workspace tool; there is no public CLI binary yet.

If you are reviewing or building from source, use the repository's complete runtime object. Do not reconstruct one from addresses copied across pages.

## Values that travel together

Before any value-moving action, these values must come from the same runtime:

- Chain ID and RPC response
- Pool and deployment block
- Deposit and withdrawal verifiers
- Verifier adapter and expected bytecode hashes
- Withdrawal selector and fee policy
- Manifest, setup record, WASM, and zkey identities
- Groth16 public-input order
- Recovery-note chain, pool, runtime, and template binding

## Mismatch behavior

| Mismatch | Required behavior |
| --- | --- |
| RPC chain differs | Reject reads and submission |
| Pool or verifier differs | Reject runtime and proof binding |
| Recovery export belongs elsewhere | Reject import |
| Artifact hash or input order differs | Reject proof generation |
| Fee state changed | Regenerate proof |
| Unknown runtime | Reject selection |

On any mismatch, Nullark stops before fallback, weaker proving files, or replacement submission.