Configuration

klay_chainID

Returns the chain ID of the chain.

Parameters

None

Return Value

Type	Description
QUANTITY	Integer of the chain ID of the chain.

Example

// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"klay_chainID","id":1}' https://public-en-baobab.klaytn.net

// Result
{
    "jsonrpc":"2.0",
    "id":1,
    "result":"0x7e2"
}

klay_clientVersion

Returns the current client version of a Klaytn node.

Parameters

None

Return Value

Type	Description
String	The current client version of a Klaytn node.

Example

// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"klay_clientVersion","id":1}' https://public-en-baobab.klaytn.net

// Result
{
    "jsonrpc":"2.0",
    "id":1,
    "result":"Klaytn/v0.9.1+3518232250/linux-amd64/go1.11.2"
}

klay_gasPrice

Returns a suggestion for a gas price in peb.

Parameters

None

Return Value

Type	Description
QUANTITY	Integer of the current gas price in peb.

Example

// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"klay_gasPrice","params":[],"id":1}' https://public-en-baobab.klaytn.net

// Result
{
  "jsonrpc": "2.0",
  "id":1,
  "result": "0xAE9F7BCC00" // 250,000,000,000 peb = 250 ston
}

klay_gasPriceAt

Returns different values based on the condition described below. The unit of the return value is peb.

• If baseFee is undefined in the header, it returns the unit price from the governance parameter

• If the block is a pending block, it returns the gas price of the txpool.

• Otherwise, it returns the base fee of the given block.

Parameters

Type	Description
NUMBER	Block number. If omitted, latest unit price will be returned.

Return Value

Type	Description
QUANTITY	Integer of the current gas price in peb.

Example

// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"klay_gasPriceAt","params":["0x64"],"id":1}' https://public-en-baobab.klaytn.net

// Result
{
  "jsonrpc": "2.0",
  "id":1,
  "result": "0xAE9F7BCC00" // 250,000,000,000 peb = 250 ston
}

klay_isParallelDBWrite

Returns true if the node is writing blockchain data in parallel manner. It is enabled by default.

Parameters

None

Return Value

Type	Description
Boolean	true means the node is writing blockchain data in parallel manner. It is false if the node is writing the data in serial manner.

Example

// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"klay_isParallelDBWrite","id":1}' https://public-en-baobab.klaytn.net

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

klay_isSenderTxHashIndexingEnabled

Returns true if the node is indexing sender transaction hash to transaction hash mapping information. It is disabled by default and can be enabled by --sendertxhashindexing.

Parameters

None

Return Value

Type	Description
Boolean	true means the node is indexing sender transaction hash to transaction hash mapping information.

Example

// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"klay_isSenderTxHashIndexingEnabled","id":1}' https://public-en-baobab.klaytn.net

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

klay_protocolVersion

Returns the Klaytn protocol version of the node. The current version (as of v1.9.0) of Cypress/Baobab is istanbul/65.

Parameters

None

Return Value

Type	Description
String	The Klaytn protocol version of the node.

Example

// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"klay_protocolVersion","params":[],"id":1}' https://public-en-baobab.klaytn.net

// Result
{
   "jsonrpc":"2.0",
   "id":1,
   "result":"0x40"
}

klay_rewardbase

Returns the rewardbase of the current node. Rewardbase is the address of the account where the block rewards goes to. It is only required for CNs.

Parameters

None

Return Value

Type	Description
20-byte DATA	Address.

Example

// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"klay_rewardbase","id":1}' https://public-en-baobab.klaytn.net

// Result - If requested from non-CN nodes
{
    "jsonrpc":"2.0",
    "id":1,
    "error":{
        "code":-32000,
        "message":"rewardbase must be explicitly specified"
        }
}

// Result - If requested from CN nodes
{
    "jsonrpc":"2.0",
    "id":1,
    "result":"0x96Fd91f34Cc8da9f6338C106Ba37aA8B48FB4Fa5"
}