trace get | Fantom

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Parameters

• txHash — the hash of the transaction from which to retrieve the trace.
• traceIndex — an array of integers specifying the zero-based indices of the traces to retrieve.

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JSON-RPC example

curl https://fantom-mainnet.core.chainstack.com/4ab982aa70a7baead515ffdb5915df3f \
-X POST \
-H "Content-Type: application/json" \
--data '{"jsonrpc":"2.0","id":1,"method":"trace_get","params":["0xa2b1e35f59d184da1996b37803ed2e8e81057be7d07a93af48a410fd9338d616", ["0x1"]]}'

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Response

• action — an object that describes the action taken by the transaction:
  • callType — the type of call, such as call, delegatecall, or staticcall.
  • from — the address of the sender who initiated the transaction.
  • gas — the units of gas used by the transaction.
  • input — the data sent with the transaction.
  • to — the recipient of the transaction, if applicable.
  • value — the value transferred in Wei.
• blockHash — the hash of the block in which the transaction was included.
• blockNumber — the number of the block in which the transaction was included.
• result — an object that contains the outcome of the trace:
  • gasUsed — the gas used by the transaction, encoded as hexadecimal.
  • output — the return value of the execution, encoded as a hexadecimal string.
• subtraces — the number of sub-traces spawned by the trace.
• traceAddress — an array that indicates the hierarchical position of the trace.
• transactionHash — the hash of the transaction.
• transactionPosition — the position of the transaction within the block.
• type — the type of action taken by the transaction, call or create.

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trace_get code examples

const { Web3, Web3PluginBase } = require("web3");
const NODE_URL = "CHAINSTACK_NODE_URL";
const web3 = new Web3(NODE_URL);

// Define the TraceBlockPlugin class with only trace_get
class TraceBlockPlugin extends Web3PluginBase {
    pluginNamespace = 'trace';

    // trace_get method
    async traceGet(txHash, transactionPositions) {
        return this.requestManager.send({
            method: 'trace_get',
            params: [txHash, transactionPositions],
        });
    }
}

// Register the plugin
web3.registerPlugin(new TraceBlockPlugin());

// Function to use traceGet
async function traceGet(txHash, transactionPositions) {
    const result = await web3.trace.traceGet(txHash, transactionPositions);
    console.log(result);
}

// Example usage of traceGet
const txHash = '0xa2b1e35f59d184da1996b37803ed2e8e81057be7d07a93af48a410fd9338d616'; // Replace with actual block hash
const transactionPositions = ['0x1']; // Replace with actual transaction indices in the block

traceGet(txHash, transactionPositions);

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Use case

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Try the trace_get RPC method yourself