# Block
### 기본 블록 매개변수
`eth` 네임스페이스를 이용하여 API 요청을 보낼 때, 블록 높이는 `defaultBlock` 매개변수에 의해 결정됩니다.
`defaultBlock` 매개변수를 통해 설정할 수 있는 사항들은 다음과 같습니다.
* `16진수 문자열` - 블록 번호의 정수 형태입니다.
* `"earliest" 문자열` - 제네시스 블록입니다.
* `"latest" 문자열` - 가장 최근에 채굴된 블록입니다.
* `"pending" 문자열` - 트랜잭션의 Pending 상태입니다.
### eth\_blockNumber
가장 최근의 블록 번호를 반환합니다.
**Parameters**
None
**Return Value**
| Type | Description |
| -------- | ----------------------------- |
| QUANTITY | 클라이언트가 있는 현재 블록 번호의 정수 형태입니다. |
**Example**
```shell
// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":83}' http://localhost:8551
// Result
{
"jsonrpc": "2.0",
"id":83,
"result": "0xc94"
}
```
### eth\_getHeaderByNumber
블록 번호를 기준으로 헤더 정보를 반환합니다.
해당 API를 사용하기 전에 [주의사항-블록 헤더](/content/dapp/json-rpc/api-references/eth/caution.md#block_header) 를 확인하시기 바랍니다.
**Parameters**
| Type | Description |
| --------------- | --------------------------------------------------------------------------------------------------------------------------- |
| QUANTITY \| TAG | 정수 형태의 블록 번호 또는 [기본 블록 매개변수](#the-default-block-parameter)에서와 같이 `"earliest"`, `"latest"`, `"pending"`과 같이 상태를 나타내는 문자열입니다. |
**Return Value**
See [eth\_getHeaderByHash](#eth_getheaderbyhash)
**Example**
```shell
// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_getHeaderByNumber","params":["0x1b4"],"id":1}' http://localhost:8551
// Result
{
"jsonrpc": "2.0",
"id": 1,
"result": {
"baseFeePerGas": "0x5d21dba00",
"difficulty": "0x1",
"extraData": "0x",
"gasLimit": "0xe8d4a50fff",
"gasUsed": "0x28b484",
"hash": "0x5de0dc71dec2e724be002dcad135b602810769ce26e16b3b06862405e08ca71b",
"logsBloom": "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",
"miner": "0xea674fdde714fd979de3edf0f56aa9716b898ec8",
"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
"nonce": "0x0000000000000000",
"number": "0x1b4",
"parentHash": "0x99fcd33dddd763835ba8bdc842853d973496a7e64ea2f6cf826bc2c338e23b0c",
"receiptsRoot": "0xd3d70ed54a9274ba3191bf2d4fd8738c5d782fe17c8bfb45c03a25dc04120c35",
"sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
"size": "0x23a",
"stateRoot": "0x1076e6726164bd6f74720a717242584109f37c55017d004eefccf9ec3be76c18",
"timestamp": "0x61b0a6c6",
"totalDifficulty": "0x12",
"transactionsRoot": "0x6ec8daca98c1005d9bbd7716b5e94180e2bf0e6b77770174563a166337369344" }
}
```
### eth\_getHeaderByHash
블록 해시를 기준으로 헤더의 정보를 반환합니다.
해당 API를 사용하기 전에 [주의사항-블록 헤더](/content/dapp/json-rpc/api-references/eth/caution.md#block_header) 를 확인하시기 바랍니다.
**Parameters**
| Type | Description |
| ------------ | ---------------- |
| 32-byte DATA | Hash of a block. |
**Return Value**
`Object` - A header object, or `null` when no header was found. Otherwise, it returns an error.
| Name | Type | Description |
| ---------------- | -------------- | ------------------------------------------------------------------------------------------------------------------------- |
| baseFeePerGas | QUANTITY | The base fee per gas. |
| difficulty | QUANTITY | The integer of the difficulty for this block. |
| extraData | DATA | 블록의 "추가 데이터"를 위한 필드입니다. |
| gasLimit | QUANTITY | The maximum gas allowed in this block. |
| gasUsed | QUANTITY | 블록에 있는 트랜잭션들에서 사용된 가스양의 총합입니다. |
| hash | 32-byte DATA | 블록의 해시입니다. 아직 보류 중인 블록이면 `null`입니다. |
| logsBloom | 256바이트 크기 DATA | 블록의 로그를 위한 블룸필터입니다. |
| miner | 20-byte DATA | The address of the beneficiary to whom the mining rewards were given. |
| mixHash | 32-byte DATA | The hash which proves combined with the nonce that a sufficient amount of computation has been carried out on this block. |
| nonce | 8바이트 크기 DATA | The hash of the generated proof-of-work. |
| number | QUANTITY | The block number. `null` when it is a pending block. |
| parentHash | 32-byte DATA | 이전 블록의 해시입니다. |
| receiptsRoot | 32-byte DATA | 블록의 영수증 트라이의 루트 해시입니다. |
| sha3Uncles | 32-byte DATA | The SHA3 of the uncles data in the block. |
| size | QUANTITY | Integer of the size of this block in bytes. |
| stateRoot | 32-byte DATA | 블록의 상태 트라이의 루트 해시입니다. |
| timestamp | QUANTITY | 블록이 생성되었을 때의 Unix 타임스탬프입니다. |
| totalDifficulty | QUANTITY | The total blockScore of the chain until this block. |
| transactionsRoot | 32-byte DATA | 블록의 트랜잭션 트라이의 루트 해시입니다. |
**Example**
```shell
// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_getHeaderByHash","params":["0xb8deae63002d2b6aa33247c8ef545383ee0fd2282ac9b49dbbb74114389ddb5c"],"id":1}' http://localhost:8551
// Result
{
"jsonrpc": "2.0",
"id": 1,
"result": {
"baseFeePerGas": "0x5d21dba00",
"difficulty": "0x1",
"extraData": "0x",
"gasLimit": "0xe8d4a50fff",
"gasUsed": "0x28b484",
"hash": "0xb8deae63002d2b6aa33247c8ef545383ee0fd2282ac9b49dbbb74114389ddb5c",
"logsBloom": "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",
"miner": "0xea674fdde714fd979de3edf0f56aa9716b898ec8",
"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
"nonce": "0x0000000000000000",
"number": "0xd208de",
"parentHash": "0x99fcd33dddd763835ba8bdc842853d973496a7e64ea2f6cf826bc2c338e23b0c",
"receiptsRoot": "0xd3d70ed54a9274ba3191bf2d4fd8738c5d782fe17c8bfb45c03a25dc04120c35",
"sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
"size": "0x23a",
"stateRoot": "0x1076e6726164bd6f74720a717242584109f37c55017d004eefccf9ec3be76c18",
"timestamp": "0x61b0a6c6",
"totalDifficulty": "0xd208df",
"transactionsRoot": "0x6ec8daca98c1005d9bbd7716b5e94180e2bf0e6b77770174563a166337369344"
}
}
```
### eth\_getBlockByNumber
블록 번호로 조회한 블록의 정보를 반환합니다.
해당 API를 사용하기 전에 [주의사항-블록](/content/dapp/json-rpc/api-references/eth/caution.md#block) 을 확인하시기 바랍니다.
**Parameters**
| Type | Description |
| --------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------- |
| QUANTITY \| TAG | Integer or hexadecimal block number, or the string `"earliest"`, `"latest"` or `"pending"` as in [default block parameter](#the-default-block-parameter). |
| Boolean | `true`이면 트랜잭션 객체 전체를 반환하고, `false`이면 트랜잭션의 해시만을 반환합니다. |
**Return Value**
See [eth\_getBlockByHash](#eth_getblockbyhash)
**Example**
```shell
// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_getBlockByNumber","params":["0xd0054e", false],"id":1}' http://localhost:8551
// Result
{
"jsonrpc": "2.0",
"id": 1,
"result": {
"baseFeePerGas": "0x5d21dba00",
"difficulty": "0x1",
"extraData": "0x",
"gasLimit": "0xe8d4a50fff",
"gasUsed": "0x44437",
"hash": "0x456a7cbb6fada11a0ca8cec24510d89da1c52898f1087528752ae6e13973fbc5",
"logsBloom": "0x0000100000000094000000400000080000000040000000000000000000000002000000000000000000000000004001000000200000000000000008000220000000080400000800000000000a000000000000000000000000000010000000000000002000000408000000000000000010000080101002000000000010000000100000010000200800000400000080000000000000000000000002000000102000024000080200000000000082000000000000000000000000010000000000000000100012000000000000011000000000002000201000000008000000002000000010002800000000001400000000000000000000000100000000200000000000",
"miner": "0x1ad91ee08f21be3de0ba2ba6918e714da6b45836",
"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
"nonce": "0x0000000000000000",
"number": "0xd0054e",
"parentHash": "0x2b88fdb3821669357a0b8367115e30145135c44bb8f62641d4e7765a7f555d17",
"receiptsRoot": "0xc36bc44d0b52dee954be9bbd519bddc0bf6e991af2ed6f6ba506f89f10cdb9a7",
"sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
"size": "0x64c",
"stateRoot": "0x123a0da1c621236e64f9b486a9a9712ec6ce07d6690acab5a18b716d17cdc29f",
"timestamp": "0x6194f184",
"totalDifficulty": "0xd0054f",
"transactions": [
"0x5b3492f8199ee2a551d991b7d00bd48967ca5e5c1c15d6e1ee9fda97e3126e9a",
"0x8e1870262f2ba0452458280ad6ad5d54e5288623e415692c822979b7608c7297",
"0x98053d20b01c9e56964a57084fb91ccc01b242adfb09c23534162dcbbcc094c2",
],
"transactionsRoot": "0x29b9880f57c0e79d0be5aa4fcc6b4cfcbed3e51478ad8f44533acce012df8cf1",
"uncles": []
}
}
```
### eth\_getBlockByHash
블록 해시를 기준으로 블록의 정보를 반환합니다.
해당 API를 사용하기 전에 [주의사항-블록](/content/dapp/json-rpc/api-references/eth/caution.md#block) 을 확인하시기 바랍니다.
**Parameters**
| Type | Description |
| ------------ | -------------------------------------------------------------------------------------------------- |
| 32-byte DATA | Hash of a block. |
| Boolean | If `true` it returns the full transaction objects, if `false` only the hashes of the transactions. |
**Return Value**
`Object` - A block object, or `null` when no block was found. Otherwise, it returns an error.
| Name | Type | Description |
| ---------------- | ------------- | ------------------------------------------------------------------------------------------------------------------------- |
| baseFeePerGas | QUANTITY | The base fee per gas. |
| difficulty | QUANTITY | The integer of the difficulty for this block |
| extraData | DATA | The "extra data" field of this block. |
| gasLimit | QUANTITY | The maximum gas allowed in this block. |
| gasUsed | QUANTITY | The total used gas by all transactions in this block. |
| hash | 32-byte DATA | Hash of the block. `null` when it is a pending block. |
| logsBloom | 256-byte DATA | The bloom filter for the logs of the block. `null` when it is a pending block. |
| miner | 20-byte DATA | The address of the beneficiary to whom the mining rewards were given. |
| mixHash | 32-byte DATA | The hash which proves combined with the nonce that a sufficient amount of computation has been carried out on this block. |
| nonce | 8-byte DATA | The hash of the generated proof-of-work. |
| number | QUANTITY | The block number. `null` when it is a pending block. |
| parentHash | 32-byte DATA | Hash of the parent block. |
| receiptsRoot | 32-byte DATA | The root of the receipts trie of the block. |
| sha3Uncles | 32-byte DATA | The SHA3 of the uncles data in the block. |
| size | QUANTITY | Integer of the size of this block in bytes. |
| stateRoot | 32-byte DATA | The root of the final state trie of the block. |
| timestamp | QUANTITY | The Unix timestamp for when the block was collated. |
| totalDifficulty | QUANTITY | The total blockScore of the chain until this block |
| transactionsRoot | 32-byte DATA | The root of the transaction trie of the block. |
| transactions | Array | 트랜잭션 객체의 배열이거나 또는 마지막으로 주어진 매개변수에 따라 32바이트 크기의 트랜잭션 해시입니다. |
| uncles | Array | Array of uncle hashes. |
**Example**
```shell
// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_getBlockByHash","params":["0xb8deae63002d2b6aa33247c8ef545383ee0fd2282ac9b49dbbb74114389ddb5c", true],"id":1}' http://localhost:8551
// Result
{
"jsonrpc":"2.0",
"id":1,
"result":{
baseFeePerGas: "0x5d21dba00",
difficulty: "0x1",
extraData: "0xd8820505846b6c617988676f312e31312e328664617277696e00000000000000f89ed594e733cb4d279da696f30d470f8c04decb54fcb0d2b841f1f600d136f93a5a2d9c12a7a9f6d7ba80a047c3910a2bbc01e38bcce25e48ed2004d21f134df5efaf1f8cbb9a26e1548e57628ab258c935490c11a7cd65324701f843b841444b3efc40071b6eec2c4d2630b483710b8fc7a601432431b0161f489102d1ca02f2ef93153d0be3843aa563d34cee1716163f58711843442aedd94a56303c0400",
gasLimit: "0xe8d4a50fff",
gasUsed: "0x0",
governanceData: "0x",
hash: "0xb8deae63002d2b6aa33247c8ef545383ee0fd2282ac9b49dbbb74114389ddb5c",
logsBloom: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
miner: "0x0000000000000000000000000000000000000000",
mixHash: "0x63746963616c2062797a616e74696e65206661756c7420746f6c6572616e6365",
nonce: "0x0000000000000000",
number: "0x1",
parentHash: "0x73255a60e9491b5715f9bfcb7fa1143296810f629836d4cefbd1921d9173d63d",
receiptsRoot: "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
reward: "0x0000000000000000000000000000000000000000",
size: "0x2d7",
stateRoot: "0xedb87f4b0f905a655c80d1768eb22b1eff2405098c4748b8364c869611e02a2b",
timestamp: "0x5c99cbd8",
totalDifficulty: "0x2",
transactions: [],
transactionsRoot: "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
uncles: [],
}
}
```
### eth\_getUncleByBlockHashAndIndex
Returns information about a uncle of a block by hash and the uncle's index position. Since there are no uncles in Klaytn, it always returns `null`.
**Parameters**
| Type | Description |
| ------------ | --------------------------- |
| 32-byte DATA | The hash of a block. |
| QUANTITY | The uncle's index position. |
**Return Value** `null`
**Example**
```shell
// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_getUncleByBlockHashAndIndex","params":["0xb8deae63002d2b6aa33247c8ef545383ee0fd2282ac9b49dbbb74114389ddb5c", "0x1"],"id":1}' http://localhost:8551
// Result
{
"jsonrpc": "2.0",
"id":1,
"result": null
}
```
### eth\_getUncleByBlockNumberAndIndex
Returns information about a uncle of a block by number and the uncle's index position. As there are no uncles in Klaytn, it always returns `null`.
**Parameters**
| Type | Description |
| --------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------- |
| QUANTITY \| TAG | Integer or hexadecimal block number, or the string `"earliest"`, `"latest"` or `"pending"` as in [default block parameter](#the-default-block-parameter). |
| QUANTITY | The uncle's index position. |
**Return Value** `null`
**Example**
```shell
// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_getUncleByBlockNumberAndIndex","params":["0xe8", "0x1"],"id":1}' http://localhost:8551
// Result
{
"jsonrpc": "2.0",
"id":1,
"result": null
}
```
### eth\_getBlockTransactionCountByNumber
블록 번호로 조회한 블록에 담긴 트랜잭션의 개수를 반환합니다.
**Parameters**
| Type | Description |
| --------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------- |
| QUANTITY \| TAG | Integer or hexadecimal block number, or the string `"earliest"`, `"latest"` or `"pending"` as in [default block parameter](#the-default-block-parameter). |
**Return Value**
| Type | Description |
| -------- | ---------------------------- |
| QUANTITY | 이 블록에 담긴 트랜잭션의 개수의 정수 형태입니다. |
**Example**
```shell
// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_getBlockTransactionCountByNumber","params":["0xe8"],"id":1}' http://localhost:8551
// Result
{
"jsonrpc": "2.0",
"id":1,
"result": "0xa" // 10
}
```
### eth\_getBlockTransactionCountByHash
블록 해시를 기준으로 조회한 특정 블록에 담긴 트랜잭션의 개수를 반환합니다.
**Parameters**
| Type | Description |
| ------------ | ----------- |
| 32-byte DATA | 블록의 해시입니다. |
**Return Value**
| Type | Description |
| -------- | ---------------------------------------------------- |
| QUANTITY | Integer of the number of transactions in this block. |
**Example**
```shell
// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_getBlockTransactionCountByHash","params":["0x0c11803ab36110db993e7520908b9ba9336cca2f2dcc9b6130c481a3ccdc2621"],"id":1}' http://localhost:8551
// Result
{
"jsonrpc": "2.0",
"id":1,
"result": "0x0"
}
```
### eth\_getUncleCountByBlockNumber
Returns the number of uncles in a block from a block matching the given block number. Since there are no uncles in Klaytn, it returns `0x0`. It returns `null` if there is no matching block.
**Parameters**
| Type | Description |
| --------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------- |
| QUANTITY \| TAG | Integer or hexadecimal block number, or the string `"earliest"`, `"latest"` or `"pending"` as in [default block parameter](#the-default-block-parameter). |
**Return Value**
| Type | Description |
| -------- | ----------------------------------------------------------------------------------------------------- |
| QUANTITY | Integer of the number of transactions in this block. It returns `null` if there is no matching block. |
**Example**
```shell
// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_getBlockTransactionCountByNumber","params":["0xe8"],"id":1}' http://localhost:8551
// Result
{
"jsonrpc": "2.0",
"id":1,
"result": "0x0" // 0
}
```
### eth\_getUncleCountByBlockHash
Returns the number of uncles in a block from a block matching the given block hash. Since there are no uncles in Klaytn, it returns `0x0`. It returns `null` if there is no matching block.
**Parameters**
| Type | Description |
| ------------ | --------------- |
| 32-byte DATA | Hash of a block |
**Return Value**
| Type | Description |
| -------- | ----------------------------------------------------------------------------------------------------- |
| QUANTITY | Integer of the number of transactions in this block. It returns `null` if there is no matching block. |
**Example**
```shell
// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_getBlockTransactionCountByHash","params":["0x0c11803ab36110db993e7520908b9ba9336cca2f2dcc9b6130c481a3ccdc2621"],"id":1}' http://localhost:8551
// Result
{
"jsonrpc": "2.0",
"id":1,
"result": "0x0"
}
```
### eth\_getStorageAt
입력으로 받은 주소의 스토리지 위치에서 값을 반환합니다.
**Parameters**
| Type | Description |
| ----------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| 20-byte DATA | 스토리지의 주소입니다. |
| QUANTITY | 스토리지 내 위치의 정수 형태입니다. |
| QUANTITY \| TAG \| HASH | Integer or hexadecimal block number, or the string `"earliest"`, `"latest"` or `"pending"` as in [default block parameter](#the-default-block-parameter), or block hash. |
**Return Value**
| Type | Description |
| ---- | -------------------------- |
| DATA | 입력으로 받은 스토리지 위치의 값을 반환합니다. |
**Example**
올바른 위치를 계산하는 것은 탐색할 스토리지에 따라 차이가 있습니다. Consider the following contract deployed at `0x295a70b2de5e3953354a6a8344e616ed314d7251` by the address `0x391694e7e0b0cce554cb130d723a9d27458f9298`.
```
contract Storage {
uint pos0;
mapping(address => uint) pos1;
function Storage() {
pos0 = 1234;
pos1[msg.sender] = 5678;
}
}
```
`pos0`의 값은 다음과 같이 쉽게 찾을 수 있습니다.
```shell
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0", "method": "eth_getStorageAt", "params": ["0x295a70b2de5e3953354a6a8344e616ed314d7251", "0x0", "latest"], "id": 1}' http://localhost:8551
{"jsonrpc":"2.0","id":1,"result":"0x00000000000000000000000000000000000000000000000000000000000004d2"}
```
맵핑의 요소를 찾는 것은 더 어렵습니다. 맵핑의 요소의 위치는 다음과 같이 계산됩니다.
```javascript
keccak(LeftPad32(key, 0), LeftPad32(map position, 0))
```
즉 `pos1["0x391694e7e0b0cce554cb130d723a9d27458f9298"]`의 스토리지를 탐색하려면 아래와 같이 그 위치를 계산해야 합니다.
```javascript
keccak(decodeHex("000000000000000000000000391694e7e0b0cce554cb130d723a9d27458f9298" + "0000000000000000000000000000000000000000000000000000000000000001"))
```
이는 `klay` 라이브러리와 함께 제공되는 Klaytn 콘솔을 사용하여 계산할 수 있습니다.
```javascript
> var key = "000000000000000000000000391694e7e0b0cce554cb130d723a9d27458f9298" + "0000000000000000000000000000000000000000000000000000000000000001"
undefined
> klay.sha3(key, {"encoding": "hex"})
"0x6661e9d6d8b923d5bbaab1b96e1dd51ff6ea2a93520fdc9eb75d059238b8c5e9"
```
이제 스토리지 값을 가져오려면 다음과 같이 입력합니다.
```shell
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0", "method": "eth_getStorageAt", "params": ["0x295a70b2de5e3953354a6a8344e616ed314d7251", "0x6661e9d6d8b923d5bbaab1b96e1dd51ff6ea2a93520fdc9eb75d059238b8c5e9", "latest"], "id": 1}' http://localhost:8551
{"jsonrpc":"2.0","id":1,"result":"0x000000000000000000000000000000000000000000000000000000000000162e"}
```
### eth\_mining
클라이언트가 새로운 블록을 채굴하고 있으면 `true`를 반환합니다.
**참고**: 현재는 트랜잭션을 재전송하기 위해 모든 노드가 기본적으로 채굴 모드입니다. Please note that the actual "mining" is only performed by the Consensus Nodes (CNs).
**Parameters**
None
**Return Value**
| Type | Description |
| ------- | --------------------------------------------------- |
| Boolean | 클라이언트가 채굴 중이면 `true`를 반환하고, 그렇지 않으면 `false`를 반환합니다. |
**Example**
```shell
// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_mining","params":[],"id":1}' http://localhost:8551
// Result
{
"jsonrpc":"2.0",
"id":1,
"result":true
}
```
### eth\_syncing
동기화 상태에 대한 데이터가 있는 객체를 반환하거나 `false`를 반환합니다.
**Parameters**
None
**Return Value**
`Object|Boolean`, 동기화 상태에 대한 데이터 객체를 반환하거나 또는 동기화하고 있지 않으면 `false` 를 반환합니다.
| Name | Type | Description |
| ------------- | -------- | --------------------------------------------------------------------------- |
| startingBlock | QUANTITY | 가져오기 시작하는 블록입니다(동기화가 완료되면 재설정됩니다). |
| currentBlock | QUANTITY | The current block, same as `eth_blockNumber`. |
| highestBlock | QUANTITY | 예상되는 최신 블록 번호입니다. |
| pulledStates | QUANTITY | 지금까지 처리된 상태 항목의 개수입니다. 동기화 모드가 "fast"가 아니면 0이 반환됩니다. |
| knownStates | QUANTITY | 가져와야 하는 알려진 상태 항목의 개수입니다. If the sync mode is not "fast", zero is returned. |
**Example**
```shell
// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_syncing","params":[],"id":1}' http://localhost:8551
// Result
{
"jsonrpc": "2.0",
"id":1,
"result": {
"currentBlock":"0x3e31e",
"highestBlock":"0x827eef",
"knownStates":"0x0",
"pulledStates":"0x0",
"startingBlock":"0x0"
}
}
// Or when not syncing
{
"jsonrpc": "2.0",
"id":1,
"result": false
}
```
---
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If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter:
```
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```
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The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
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