[Transaction] klay_createAccessList

This method creates an accessList based on a given Transaction. The accessList contains all storage slots and addresses read and written by the transaction, except for the sender account and the precompiles. This method uses the same transaction call object and blockNumberOrTag object as caver.rpc.klay.call. An accessList can be used to release stuck contracts that became inaccessible due to gas cost increases. Adding an accessList to your transaction does not necessary result in lower gas usage compared to a transaction without an access list.

JSONRPC: klay_createAccessList

Request

application/json

Body

params

undefined[]

required

Array [

CallObject

object

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

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.

BlockParameter

object

(optional) A block number, blockhash or the block tag string (latest or earliest). If omitted, latest will be used.

oneOf

IntegerBlockNumber

the block number with type integer

number

HexadecimalBlockNumber

the block number with type hexadecimal

string

BlockTag

the block tag [latest, pending, earliest]

string

BlockHash

the block hash

string

]

Responses

200

returns an object includes an access list

application/json

Schema

Schema

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

object

accessList

object[]

required

Array [

oldestBlock stringrequired

Lowest number block of returned range.

reward array[]required

A two-dimensional array of effective priority fees per gas at the requested block percentiles.

baseFeePerGas string[]required

An array of block base fees per gas. This includes the next block after the newest of the returned range, because this value can be derived from the newest block. Zeroes are returned for pre-EIP-1559 blocks.

gasUsedRatio hex[]required

An array of gasUsed/gasLimit in the block.

]

gasUsed hexrequired

Example (from schema)

{
  "jsonrpc": "2.0",
  "id": 0,
  "error": {
    "code": -32700,
    "message": "Parse error",
    "data": "string"
  },
  "result": {
    "accessList": [],
    "gasUsed": "0x0"
  }
}

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