> For the complete documentation index, see [llms.txt](https://docs.blockpi.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.blockpi.io/build/api-reference/hyperliquid/story-3/debug_traceblockbyhash.md).

# debug\_traceBlockByHash

It accepts a block hash and will replay the block that is already present in the database.

#### **Parameters:**

**String** - The hash of a block.

**Object** - tracer

* **tracer: string** - the type of tracer. Currently supports `callTracer` and `prestateTracer`

#### **Returns:**

**Array** - Block traces

#### Example:

{% code overflow="wrap" %}

```json
// Request
curl https://hyperliquid.blockpi.network/v1/rpc/your-rpc-key -X POST -H "Content-Type: application/json" --data '{"method":"debug_traceBlockByHash","params":["0x146a8d273ac746431a6c5d9c9417554d8cd7290901d0dec8bda041b293db82b8", {"tracer": "callTracer"}],"id":1,"jsonrpc":"2.0"}'

// Result
{
    "jsonrpc": "2.0",
    "id": 1,
    "result":{as described above}
}
```

{% endcode %}