[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

application/json

Body

method stringrequired

Default value: klay_estimateGas

Method name

id int64required

Default value: 1

Request ID, Random or Auto incrementation

jsonrpc stringrequired

Default value: 2.0

JSON-RPC Version (2.0)

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

200

The amount of gas used.

application/json

Schema

Schema

jsonrpc stringrequired

Default value: 2.0

id int64required

error

object

code int64required

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

| code | message | description | |-----|-----|-------| | -32700 | Parse error | invalid JSON was received by the server. An error occurred on the server while parsing the JSON text. | |-32602 | Invalid params | Invalid 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.

Example (from schema)

{
  "jsonrpc": "2.0",
  "id": 0,
  "error": {
    "code": -32700,
    "message": "Parse error",
    "data": "string"
  },
  "result": "0x5208"
}

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