Runs an eth_call within the context of the given block execution using the final state of parent block as the base.


In addition to the hash of the transaction you may give it a secondary optional argument, which specifies the options for this specific call. The possible options are:
  • object - The transaction call object with the following fields:
    • from:OPTIONAL (string) - The address the transaction is sent from
    • to: OPTIONAL (string) - The address the transaction is directed to
    • gas:OPTIONAL (integer) - The integer of the gas provided for the transaction execution
    • gasPrice:OPTIONAL (integer) - The integer of the gasPrice used for each paid gas
    • value:OPTIONAL (integer) - The integer of the value sent with this transaction
    • data:OPTIONAL (string) -The hash of the method signature and encoded parameters
  • blockReference:(string) - The block number in hexadecimal format, the block hash, or tags. The supported tag values include earliest for the earliest/genesis block, latest for the latest mined block, pending for the pending state/transactions, safe for the most recent secure block, and finalized for the most recent secure block
  • object - OPTIONAL The tracer object with the following fields:
    • tracer: (string) - The type of tracer. It could be callTracer or prestateTracer
      • callTracer - The calltracer keeps track of all call frames, including depth 0 calls, that are made during a transaction
      • prestateTracer - The prestateTracer replays the transaction and tracks every part of state that occured during the transaction
    • tracerConfig: (object) - The object to specify the configurations of the tracer
      • onlyTopCall: (boolean) - When set to true, this will only trace the primary (top-level) call and not any sub-calls. It eliminates the additional processing for each call frame


  • result - The transaction trace object, which has the following fields:
    • failed - The transaction is successful or not
    • gas - The total consumed gas in the transaction
    • returnValue - The return value of the executed contract call
    • structLogs - The trace result of each step with the following fields:
    • pc - The current index in bytecode
    • op - The name of current executing operation
    • gas - The available gas in the execution
    • gasCost - The gas cost of the operation
    • depth - The number of levels of calling functions
    • error - The error of the execution
    • stack - An array of values in the current stack
    • memory - An array of values in the current memory
    • storage - The mapping of the current storage
    • refund - The total of current refund value


curl<project-id>/ext/bc/C/rpc \
-H "Content-Type: application/json" \
--data '{"method":"debug_traceCall","params":[{"from":null,"to":"0x6b175474e89094c44da98b954eedeac495271d0f","data":"0x70a082310000000000000000000000006E0d01A76C3Cf4288372a29124A26D4353EE51BE"}, "latest"],"id":1,"jsonrpc":"2.0"}'
"jsonrpc": "2.0",
"id": 1,
"result": {
"gas": 21432,
"failed": false,
"returnValue": "",
"structLogs": []