how do i use filecoin lotus to …

To check DataCap for an account using Filecoin Lotus, you can use the following command:

## Basic DataCap Check

```bash
lotus state verified-client-status <client-address>
```

Replace `<client-address>` with the actual address you want to check.

## Example Usage

```bash
# Check DataCap for a specific address
lotus state verified-client-status f1abc123def456...

# You can also use other address formats
lotus state verified-client-status t1abc123def456...
```

## Additional Commands

### Check all verified clients
```bash
lotus state list-verifiers
```

### Check verifier information
```bash
lotus state verifier-status <verifier-address>
```

### Check DataCap allocation details
```bash
lotus state get-claims <client-address>
```

## Output Information

The command will typically return:
- Current DataCap balance
- Whether the address is a verified client
- DataCap allocation history (if available)

## Alternative API Method

You can also query this information via the Lotus API:

```bash
curl -X POST \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "Filecoin.StateVerifiedClientStatus",
    "params": ["<client-address>", null],
    "id": 1
  }' \
  http://localhost:1234/rpc/v0
```

Make sure your Lotus node is running and synced before executing these commands. The default RPC port is 1234, but this may vary depending on your configuration.