## Watcher CLI commands

Non-exhaustive list of (yarn) CLI commands available for watchers. Assumes you have an environment setup either [by hand](./README.md) or using [Stack Orchestrator](https://github.com/cerc-io/stack-orchestrator), and have built `yarn && yarn build` a specific watcher.

If the watcher is an `active` watcher, run the job-runner:

```bash
yarn job-runner
```

```
# For development.
yarn server:dev

# For specifying config file.
yarn server -f environments/local.toml
```

If the watcher is `lazy` omit the above step, then run the server:

```bash
yarn server
```

This will enable the GraphQL playground at: `http://localhost:<port>/graphql`

where `<port>` is set in the `environments/local.toml` of each watcher.

To watch a contract:

```bash
yarn watch:contract --address <contract-address> --kind <contract-kind> --checkpoint <true | false> --starting-block <block-number>
```

* `address`: Address or identifier of the contract to be watched.
* `kind`: Kind of the contract.
* `checkpoint`: Turn checkpointing on (`true` | `false`).
* `starting-block`: Starting block for the contract (default: `1`).

Example:

Watch a contract with its address and checkpointing on:

```bash
yarn watch:contract --address 0x1F78641644feB8b64642e833cE4AFE93DD6e7833 --kind ERC20 --checkpoint true
```

To fill a block range:

```bash
yarn fill --start-block <from-block> --end-block <to-block>
```

* `start-block`: Block number to start filling from.
* `end-block`: Block number till which to fill.

To create a checkpoint for a contract:

```bash
yarn checkpoint create --address <contract-address> --block-hash <block-hash>
```

* `address`: Address or identifier of the contract for which to create a checkpoint.
* `block-hash`: Hash of a block (in the pruned region) at which to create the checkpoint (default: latest canonical block hash).

To verify a checkpoint:

```bash
yarn checkpoint verify --cid <checkpoint-cid>
```

* `cid`: CID of the checkpoint for which to verify.

To reset the watcher to a previous block number:

```bash
yarn reset watcher --block-number <previous-block-number>
```

* `block-number`: Block number to which to reset the watcher.

To reset the job-queue:

```bash
yarn reset job-queue
```

To reset the state:

```bash
yarn reset state --block-number <previous-block-number>
```

## Import/Export State

To export and import the watcher state:

In the source watcher, export watcher state:

```bash
yarn export-state --export-file [export-file-path] --block-number [snapshot-block-height]
```

* `export-file`: Path of file to which to export the watcher data.
* `block-number`: Block height at which to take snapshot for export.

In the target watcher, run the job-runner:

```bash
yarn job-runner
```

Import watcher state:

```bash
yarn import-state --import-file <import-file-path>
```

* `import-file`: Path of file from which to import the watcher data.

To inspect a CID:

```bash
yarn inspect-cid --cid <cid>
```

* `cid`: CID to be inspected.