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[Trace] debug_traceCall

The debug_traceCall allows tracing on a specific block if callArgs is provided.

JSONRPC: debug_traceCall

Request

Body

    params

    undefined[]

  • Array [

  • TracerCallObject

    object

    The tracer call object. See the next table for the object's properties.

    from 20-byte DATA

    (optional) Address the transaction is simulated to have been sent from. The 0x00..0 address is used if no address is specified.

    to 20-byte DATA

    (optional) Address the transaction is sent to.

    input DATA

    (optional) Hash of the method signature and encoded parameter. It replaces data field, but 'data` field is still supported for backward compatibility.

    BlockNumberOrHashOrTag

    object

    oneOf

    the block number with type integer

    number

    TracerObject

    object

    Tracer type.

    tracer string

    Possible values: [4byteTracer, callTracer, fastCallTracer, evmdisTracer, noopTracer, opcountTracer, prestateTracer, revertTracer, unigramTracer, bigramTracer, trigramTracer]

    Setting this will enable JavaScript-based transaction tracing, described in the next section. If set, the previous four arguments will be ignored. The predefined tracers can also be used as the following table.

    Tracer NameDescription
    4byteTracertraces 4-byte solidity function signatures.
    callTracera slow version of fastCallTracer. It is deprecated in favor of fastCallTracer.
    fastCallTracertraces internal contract calls, gas usage, and call results.
    evmdisTracerreturns information needed to perform evmdis-style disassembly.
    noopTraceris a template tracer that does nothing.
    opcountTraceris a sample tracer that counts the executed opcode.
    prestateTracerreturns information needed to construct a custom local genesis state that this transaction can run on.
    revertTracerreturns the revert reason, or an empty string if the transaction has not reverted.
    unigramTracercounts the occurrence of each opcode.
    bigramTracercounts the occurrence of two consecutive opcodes.
    trigramTracercounts the occurrence of three consecutive opcodes.
  • ]

Responses

The detail tracing infomation

Schema

    error

    object

    code int64required

    A Number that indicates the error type that occurred. This MUST be an integer.

    codemessagedescription
    -32700Parse errorinvalid JSON was received by the server. An error occurred on the server while parsing the JSON text.
    -32602Invalid paramsInvalid method parameter(s).
    message string

    A String providing a short description of the error. The message SHOULD be limited to a concise single sentence.

    data string

    A Primitive or Structured value that contains additional information about the error. This may be omitted. The value of this member is defined by the Server (e.g. detailed error information, nested errors etc.).

    result
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