BlockPI Network
Search
⌃K

klay_estimateGas

Generates and returns an estimate of how much gas is necessary to allow the transaction to complete.

Parameters

Name
Type
Description
callObject
Object
The transaction call object. See the next table for the object's properties.
callObject has the following properties:
Name
Type
Description
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
QUANTITY
(optional) Integer of the upper gas limit provided for the gas estimation. If no gas limit is specified, the Klaytn node uses the designated gas limit as an upper bound.
gasPrice
QUANTITY
(optional) Integer of the gasPrice used for each paid gas.
value
QUANTITY
(optional) Integer of the value sent with this transaction.
data
DATA
(optional) Hash of the method signature and encoded parameters.

Return Value

Type
Description
QUANTITY
The amount of gas used.

Example

// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc": "2.0", "method": "klay_estimateGas", "params": [{"from": "0x3f71029af4e252b25b9ab999f77182f0cd3bc085", "to": "0x87ac99835e67168d4f9a40580f8f5c33550ba88b", "gas": "0x100000", "gasPrice": "0x5d21dba00", "value": "0x0", "data": "0x8ada066e"}], "id": 1}' http://klaytn.blockpi.network/v1/rpc/your-api-key
​
// Result
{
"jsonrpc": "2.0","id":1,
"result": "0x5208" // 21000
}