Miscellaneous

eth_hashrate

Returns the number of hashes per second that the node is mining with.

Please note that it always return 0x0 because there is no PoW mechanism in Klaytn.

Parameters

None

Return Value

Type	Description
QUANTITY	The number of hashes per second.

Example

// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_hashrate","params":[],"id":1}' http://localhost:8551

// Result
{
  "jsonrpc": "2.0",
  "id":1,
  "result": "0x0"
}

eth_getHashrate

Returns the number of hashes per second that the node is mining with.

Please note that it always return 0 because there is no PoW mechanism in Klaytn.

Parameters

None

Return Value

Type	Description
QUANTITY	The number of hashes per second.

Example

// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_getHashrate","params":[],"id":1}' http://localhost:8551

// Result
{
  "jsonrpc": "2.0",
  "id":1,
  "result": 0
}
``

## eth_getWork <a id="eth_getwork"></a>

Returns the hash of the current block, the seedHash, and the boundary condition to be met ("target").

Please note that it always return `errNoMiningWork` because there is no PoW mechanism in Klaytn.

**Parameters**

None

**Return Value**

| Type                  | Description                                                                                                                   |
|-----------------------|-------------------------------------------------------------------------------------------------------------------------------|
| Array of 32-byte DATA | List of current block header pow-hash, the seed hash used for the DAG, the boundary condition ("target"), 2^256 / difficulty. |

**Example**

```shell
// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_getWork","params":[],"id":1}' http://localhost:8551

// Result
{
  "jsonrpc": "2.0",
  "id":1,
  "error": {
    "code": -32000,
    "message": "no mining work available yet"
  }
}

eth_submitWork

Used for submitting a proof-of-work solution.

Please note that it always return false because there is no PoW mechanism in Klaytn.

Parameters

Type	Description
8-byte DATA	The nonce found (64 bits)
32-byte DATA	The header’s pow-hash (256 bits)
32-byte DATA	The mix digest (256 bits)

Return Value

Type	Description
Boolean	Returns true if the provided solution is valid, otherwise false.

Example

// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_submitWork","params":["0x0000000000000001", "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef", "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef"],"id":1}' http://localhost:8551

// Result
{
  "jsonrpc": "2.0",
  "id":1,
  "result": false
}

eth_submitHashrate

Used for submitting mining hashrate.

Please note that it always return false because there is no PoW mechanism in Klaytn.

Parameters

Name	Type	Description
hashrate	32-byte DATA	A hexadecimal string representation (32 bytes) of the hash rate.
id	32-byte DATA	A random hexadecimal(32 bytes) ID identifying the client.

Return Value

Type	Description
Boolean	Returns true if submitting went through succesfully and false otherwise.

Example

// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_submithashrate","params":["0x5", "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef"],"id":1}' http://localhost:8551

// Result
{
  "jsonrpc": "2.0",
  "id":1,
  "result": false
}

eth_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 eth_call. An accessList can be used to unstuck 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.

Parameters

Name	Type	Description
callObject	Object	The transaction call object. Refer to eth_call for the object's properties.
blockNumberOrTag	QUANTITY | TAG	Integer or hexadecimal block number, or the string "earliest", "latest" or "pending" as in default block parameter. The block number is mandatory and defines the context (state) against which the specified transaction should be executed.

Return Value

Type	Description
Object	Returns list of addresses and storage keys used by the transaction, plus the gas consumed when the access list is added.

Example

// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_createAccessList", "params": [{"from": "0x8cd02c6cbd8375b39b06577f8d50c51d86e8d5cd", "data": "0x608060806080608155"}, "latest"], "id":1}' http://localhost:8551

// Result
{
  "jsonrpc": "2.0",
  "id":1,
  "result": {
    "accessList": [{
      "address": "0xa02457e5dfd32bda5fc7e1f1b008aa5979568150",
      "storageKeys": ["0x0000000000000000000000000000000000000000000000000000000000000081"]
    }],
    "gasUsed": "0x128ee"
  }
}