# Configuration
### klay\_chainID
체인 ID를 반환합니다.
**Parameters**
None
**Return Value**
| Type | Description |
| -------- | -------------------- |
| QUANTITY | 체인 ID를 정수 형태로 반환합니다. |
**Example**
```shell
// 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
Klaytn 노드의 현재 클라이언트 버전을 반환합니다.
**Parameters**
None
**Return Value**
| Type | Description |
| ------ | ------------------------------ |
| String | Klaytn 노드의 현재 클라이언트 버전을 반환합니다. |
**Example**
```shell
// 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**
```shell
// 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 | 블록 번호입니다. 이를 생략하면 최신 단가가 반환됩니다. |
**Return Value**
| Type | Description |
| -------- | ---------------------------------------- |
| QUANTITY | Integer of the current gas price in peb. |
**Example**
```javascript
// 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`이면 노드가 병렬로 블록체인 데이터를 쓰고 있다는 것입니다. 노드가 순차적으로 블록체인 데이터를 쓰고 있으면 `false`를 반환합니다. |
**Example**
```shell
// 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`이면 노드가 트랜잭션 해시 맵핑 정보를 SenderTxHash로 색인화하고 있다는 것입니다. |
**Example**
```shell
// 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
노드의 Klaytn 프로토콜 버전을 반환합니다. The current version (as of v1.9.0) of Cypress/Baobab is `istanbul/65`.
**Parameters**
None
**Return Value**
| Type | Description |
| ------ | ---------------------- |
| String | 노드의 Klaytn 프로토콜 버전입니다. |
**Example**
```shell
// 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 | Rewardbase 주소입니다. |
**Example**
```shell
// 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"
}
```
---
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