arbtrace_call | Arbitrum

Arbitrum API method that traces the execution of eth_call within the context of a specific block's execution. This method uses the final state of the parent block as its base and allows developers to trace the execution of a particular call.

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Learn how to deploy a node with the debug and trace API methods enabled.

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Blocks older than 22,207,815th were added to the chain before Nitro migration and cannot be queried with Geth methods. Starting from block 22,207,815, Arbitrum migrated to Nitro which made Geth debug_* methods available for newer blocks.

Use the arbtrace_call method for calling blocks prior to 22,207,815.

Parameters

  • object β€” the transaction call object:

    • from β€” (optional) the string of the address used to send the transaction.
    • to β€” the string of the address to which the transaction is directed, a wallet, or a smart contract.
    • gas β€” (optional) the maximum amount of gas that can be used by the transaction.
    • gasprice β€” (optional) the amount of gas price the sender is willing to pay for each gas unit in wei.
    • value β€” (optional) the value sent with this transaction, encoded as hexadecimal.
    • data β€” (optional) additional data to be sent with the call, usually used to invoke functions from smart contracts as a string of the hash of the method signature and encoded parameters; see the Ethereum Contract ABI.
  • quantity β€” the integer of a block, encoded as hexadecimal.

  • array β€” an array identifying the type of tracer and its configuration:

    • trace β€” tracer that captures information on all call frames executed during a transaction. The resulting nested list of call frames is organized into a tree structure that reflects the way the Ethereum Virtual Machine works and can be used for debugging and analysis purposes.

Response

  • output β€” the data returned as a result of the transaction, encoded in hexadecimal format.
  • stateDiff β€” reveals changes to the state resulting from the execution of the given transaction.
  • trace β€” the basic trace of specific information.
    • action β€” the operation to be performed on the recipient.
      • from β€” the address initiating the transaction.
      • callType β€” the type of method, such as call or delegatecall.
      • gas β€” the units of gas supplied by the sender, encoded in hexadecimal format.
      • input β€” the data transmitted along with the transaction, typically used for interaction with smart contracts.
      • to β€” the recipient's address. If it's a contract creation transaction, this field is null.
      • value β€” the amount sent with the transaction, encoded as a hexadecimal.
    • result β€” the value of the gas price used, encoded as hexadecimal.
      • gasUsed β€” the total amount of gas used by all the transactions in the block, encoded as hexadecimal.
      • output β€” the return value from the contract call, encoded in hexadecimal. If the RETURN method isn't executed, the output will be empty bytes.
    • subtraces β€” a list of contract calls made by the transaction, each represented as a nested callframe object.
    • traceAddress β€” a list of addresses where the call was executed, the addresses of the parent calls, and the order of the current sub-call.
    • type β€” the value of the method, such as call or create.
  • vmTrace β€” a comprehensive trace of the virtual machine's state during the execution of a given transaction, including any sub-calls.

arbtrace_call code examples

const Web3 = require("web3");
const NODE_URL = "YOUR_CHAINSTACK_ENDPOINT";
const web3 = new Web3(NODE_URL);

// Define the arbtrace_call custom method
web3.extend({
    property: 'arbtrace',
    methods: [{
      name: 'call',
      call: 'arbtrace_call',
      params: 3,
    }],
  });
  
  async function arbtraceCall() {

        const call = {
          "from": '0xeff678bf68ca0da9dfdac0c88f431e8d0e2f7116',
          "to": '0x1b02da8cb0d097eb8d57a175b88c7d8b47997506',
          "gas": '0xfa4d9',
          "gasPrice": '0x9c1e25d',
          "data": '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'
        }
      
        const block = '0x152dd44'
      
        const tracer = 'trace';
  
    try {
      const result = await web3.arbtrace.call(call, [tracer], block);
      console.log(result);
    } catch (error) {
      console.error("Error:", error);
    }
  }
  
  arbtraceCall();
const ethers = require('ethers');
const NODE_URL = "YOUR_CHAINSTACK_ENDPOINT";
const provider = new ethers.JsonRpcProvider(NODE_URL);

const arbtraceCall = async () => {

    const call = {
      "from": '0xeff678bf68ca0da9dfdac0c88f431e8d0e2f7116',
      "to": '0x1b02da8cb0d097eb8d57a175b88c7d8b47997506',
      "gas": '0xfa4d9',
      "gasPrice": '0x9c1e25d',
      "data": '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'
    }
  
    const block = '0x152dd44'
  
    const tracer = 'trace';
    const traces = await provider.send("arbtrace_call", [call, [tracer], block]);
    console.log(traces);
  };
  
  arbtraceCall()
from web3 import Web3  
node_url = "YOUR_CHAINSTACK_ENDPOINT" 
web3 = Web3.HTTPProvider(node_url)

call = {
    'from': '0xeff678bf68ca0da9dfdac0c88f431e8d0e2f7116',
    'to': '0x1b02da8cb0d097eb8d57a175b88c7d8b47997506',
    'gas': '0xfa4d9',
    'gasPrice': '0x9c1e25d',
    'data': '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'
  }

block = 'latest'

# Specify the type of tracer: 4byteTracer, callTracer, or prestateTracer. Leave empty {} for Struct/opcode logger.
tracer = ['trace']
tx_traces = web3.provider.make_request('arbtrace_call', [call, tracer, block])
print(tx_traces)

Try the arbtrace_callMany RPC method yourself

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