POST
/
2fc1de7f08c0465f6a28e3c355e0cb14
Replay transactions in a block
curl --request POST \
  --url https://base-mainnet.core.chainstack.com/2fc1de7f08c0465f6a28e3c355e0cb14 \
  --header 'Content-Type: application/json' \
  --data '{
  "jsonrpc": "2.0",
  "method": "trace_replayBlockTransactions",
  "params": [
    "0xbb623d",
    [
      "trace"
    ]
  ],
  "id": 1
}'
{
  "jsonrpc": "<string>",
  "id": 123,
  "result": [
    {}
  ]
}
Base API method trace_replayBlockTransactions replays transactions in a specified block individually, returning the trace data for each transaction. This method is invaluable for developers, auditors, and analysts who wish to inspect the execution path of transactions within a block, including calls to other contracts, state changes, and execution outcomes without affecting the live blockchain.

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Parameters

  • blockHash or blockNumber — The hash or number of the block whose transactions you want to replay. This can be specified as a hexadecimal string for the block hash or a hexadecimal or decimal number for the block number.
  • traceTypes — An array of strings specifying the types of traces to return for each transaction. Common trace types include "vmTrace", "trace", and "stateDiff".

​
Response

  • result — An array containing the trace data for each transaction in the specified block. Each item in the array represents the trace of a single transaction, detailing calls to contracts, value transfers, and other relevant state changes that occurred during its execution.

​
Use case

The trace_replayBlockTransactions method is particularly useful for conducting detailed analyses of block transactions. Developers can use it to debug contract interactions within a specific block, auditors can use it to verify the correctness and security of transactions, and analysts might use it to study transaction patterns or detect anomalies. This method provides a granular view of transaction execution, which is essential for understanding complex interactions on the blockchain.

Body

application/json

Response

200 - application/json

Trace data for transactions in the specified block

The response is of type object.