> For the complete documentation index, see [llms.txt](https://corpus-core.gitbook.io/specification-colibri-stateless/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://corpus-core.gitbook.io/specification-colibri-stateless/developer-guide/bindings/cli/colibri-verifier.md).

# colibri-verifier

The colibri-verifier command is used to verify a proof for a given method and parameters. You can pass either a proof file as input or a url to a prover-service. If none are specified the default prover-service will be used.

```sh
    # Verify a proof for the eth_getBlockByNumber method
    colibri-verifier -i block_proof.ssz eth_getBlockByNumber latest false
```

## Options

| Option     | Argument            | Description                                                                                                                                                                                                                                                                      | Default |
| ---------- | ------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------- |
| `-c`       | `<chain_id>`        | Chain name or ID                                                                                                                                                                                                                                                                 |         |
| `-l`       | `<log_level>`       | Log level (0=silent, 1=error, 2=info, 3=debug, 4=debug\_full)                                                                                                                                                                                                                    |         |
| `-C`       | `<block_hash>`      | Trusted checkpoint                                                                                                                                                                                                                                                               |         |
| `-s`       | `<cache_dir>`       | cache-directory                                                                                                                                                                                                                                                                  |         |
| `-t`       | `<test_dir>`        | Test directory (if -DTEST=1)                                                                                                                                                                                                                                                     |         |
| `-i`       | `<proof_file>`      | Proof file to verify                                                                                                                                                                                                                                                             |         |
| `-o`       | `<proof_file>`      | Proof file to write                                                                                                                                                                                                                                                              |         |
| `-p`       | `<prover_url>`      | URL of the prover                                                                                                                                                                                                                                                                |         |
| `-r`       | `<rpc_url>`         | URL of the rpc-prover                                                                                                                                                                                                                                                            |         |
| `-b`       | `<beacon_url>`      | URL of the beacon-api                                                                                                                                                                                                                                                            |         |
| `-x`       | `<checkpointz_url>` | URL of a checkpointz or beacon-api                                                                                                                                                                                                                                               |         |
| `-m`       | `<mode>`            | Prover mode: `local`, `remote`, `hybrid`                                                                                                                                                                                                                                         |         |
| `-P`       |                     | Enable PAP (Pragmatic Adaptive Privacy) mode                                                                                                                                                                                                                                     |         |
| `-W`       |                     | Skip the Weak Subjectivity Period check (sets `VERIFY_FLAG_SKIP_WSP_CHECK`). **SECURITY:** only safe when another trust anchor (witness signatures, hard-coded checkpoint, signed package) is in place; raises the risk of long-range attacks across periods older than the WSP. |         |
| `-A`       | `<seconds>`         | Maximum age (in seconds) accepted for proofs whose request uses the `"latest"` block tag. Currently active for `eth_call`, `eth_estimateGas`, and `colibri_simulateTransaction`. `0` disables the check.                                                                         | `60`    |
| `-h`       |                     | Display this help message                                                                                                                                                                                                                                                        |         |
| `<method>` |                     | Method to verify                                                                                                                                                                                                                                                                 |         |
| `<args>`   |                     | Arguments for the method                                                                                                                                                                                                                                                         |         |


---

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