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klay_call

Executes a new message call immediately without creating a transaction on the block chain. It returns data or an error object of JSON RPC if error occurs.

Parameters

Name
Type
Description
callObject
Object
The transaction call object. See the next table for the object's properties.
blockNumberOrHash
QUANTITY | TAG | HASH
Integer or hexadecimal block number, or the string "earliest", "latest" or "pending"
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 gas provided for the transaction execution. klay_call consumes zero gas, but this parameter may be needed by some executions.
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. Data size is limited to 20KB.

Return Value

Type
Description
DATA
The return value of executed contract.

Example

// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc": "2.0", "method": "klay_call", "params": [{"from": "0x3f71029af4e252b25b9ab999f77182f0cd3bc085", "to": "0x87ac99835e67168d4f9a40580f8f5c33550ba88b", "gas": "0x100000", "gasPrice": "0x5d21dba00", "value": "0x0", "data": "0x8ada066e"}, "latest"], "id": 1}' http://klaytn.blockpi.network/v1/rpc/your-api-key
​
// Result
{"jsonrpc":"2.0","id":1,"result":"0x000000000000000000000000000000000000000000000000000000000000000a"}