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

# trace_callMany

> Performs multiple call traces on top of the same block. i.e. transaction n will be executed on top of a pending block with all n-1 transactions applied (traced) first. Allows to trace dependent transactions.

### Parameters

<ParamField query="chainId" type="string" default="10200" required>
  Unique identifier for a blockchain network.
</ParamField>

<ParamField body="id" type="number" default={1} required>
  Request identifier used to match responses.
</ParamField>

<ParamField body="jsonrpc" type="string" default="2.0" required>
  JSON-RPC version.
</ParamField>

<ParamField body="method" type="string" default="trace_callMany" required>
  JSON-RPC method name.
</ParamField>

<ParamField body="params" type="object" default={[[],0]} placeholder="[[],0]" required>
  Parameters for the trace call method: \[traceCalls, block identifier]. The first element is an array of trace calls; the second is an optional block identifier.

  Positional parameters for <code>trace\_callMany</code>:

  <ul>
    <li><code>params\[0]</code>: List of trace calls. Each trace call is an array of two items: a transaction object and an array of trace types.</li>
    <li><code>params\[1]</code>: Block identifier. Can be an integer block number or a string tag: "latest", "earliest", or "pending".</li>
  </ul>
</ParamField>

### Returns

<ResponseField name="result" type="array">
  Array - Array of the given transactions’ traces

  <Expandable title="items">
    <ResponseField name="items[]" type="object" />
  </Expandable>
</ResponseField>

<RequestExample>
  ```bash Curl theme={null}
  curl --request POST \
    --url https://api.uniblock.dev/uni/v1/json-rpc?chainId=10200 \
    --header 'content-type: application/json' \
    --data '{
      "id": 1,
      "jsonrpc": "2.0",
      "method": "trace_callMany",
      "params": [
        [],
        0
      ]
    }'
  ```
</RequestExample>

<ResponseExample>
  ```json Success theme={null}
  {
    "jsonrpc": "2.0",
    "id": 1,
    "result": [
      {
        "output": "0x",
        "stateDiff": null,
        "trace": [
          {
            "__truncated": true
          }
        ],
        "vmTrace": null
      },
      {
        "output": "0x",
        "stateDiff": null,
        "trace": [
          {
            "__truncated": true
          }
        ],
        "vmTrace": null
      }
    ]
  }
  ```
</ResponseExample>