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[Transaction] klay_estimateGas

Generates and returns an estimate of how much gas is necessary to allow the transaction to complete. The transaction will not be added to the blockchain. Note that the estimate may be significantly more than the amount of gas actually used by the transaction, for a variety of reasons including Klaytn Virtual Machine mechanics and node performance.

JSONRPC: klay_estimateGas

Request​

Body

    params

    object[]

    required

  • Array [

    • from 20-byte DATA

    (optional) The address the transaction is sent from.

    to 20-byte DATA

    (optional when testing the deployment of a new contract) The address the transaction is directed to.

    gas hex

    (optional) Integer of the gas provided for the transaction execution. klay_call consumes zero gas, but this parameter may be needed by some executions.

    gasPrice hex

    (optional) Integer of the gasPrice used for each paid gas.

    value hex

    (optional) Integer of the value sent with this transaction.

    input DATA

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

  • ]

Responses​

The amount of gas used.

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 hex

    The amount of gas used.

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