[Block] klay_getHeaderByNumber

Returns information about a header by number. This API works only on RPC call, not on JavaScript console.

NOTE: This API is supported from Kaia v1.7.0.

JSONRPC: klay_getHeaderByNumber

Request

application/json

Body

params

undefined[]

required

Array [

BlockNumberOrTag

object

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

]

Responses

200

Returns information about a header by number

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

The block header object.

number hexnullable

The block number. null when its pending block.

hash 32-byte DATAnullablerequired

Hash of the block. null when it is pending block.

parentHash 32-byte DATArequired

Hash of the parent block.

logsBloom 256-byte DATAnullable

The bloom filter for the logs of the block. null when it is pending block.

transactionsRoot 32-byte DATArequired

The root of the transaction trie of the block

stateRoot 32-byte DATArequired

The root of the final state trie of the block.

receiptsRoot 32-byte DATArequired

The root of the receipts trie of the block.

reward 20-byte DATArequired

The address of the beneficiary to whom the block rewards were given.

blockScore hexrequired

Former difficulty. Always 1 in the BFT consensus engine

extraData DATArequired

The "extra data" field of this block.

gasUsed hexrequired

The total used gas by all transactions in this block.

timestamp hexrequired

The Unix timestamp for when the block was collated.

timestampFoS hexrequired

The fraction of a second of the timestamp for when the block was collated.

governanceData DATArequired

RLP encoded governance configuration

voteData DATArequired

RLP encoded governance vote of the proposer

baseFeePerGas hexrequired

The base fee per gas. It has a meaningful value when EthTxTypeCompatible and Magma hardforks are activated.

Example (from schema)

{
  "jsonrpc": "2.0",
  "id": 0,
  "error": {
    "code": -32700,
    "message": "Parse error",
    "data": "string"
  },
  "result": {
    "baseFeePerGas": "0x5d21dba00",
    "blockScore": "0x1",
    "extraData": "0xda83010800846b6c617989676f312e31362e31338664617277696e0000000000f89ed5949712f943b296758aaae79944ec975884188d3a96b841ddfdf7e2cb0a93538f757f87f23a93ee35df703c781c6f15e31e4978ecdfb3501fc00924372b9a01df2bc452f2a924c242d83580183d131c47e49a25b78f625201f843b841b9b6034d5a8c5f5b057274cda4f427614cd1f448ee781f4c4322861d1361d09d47d6030f2b69a26cb426db984f54e71f8c112fbf882930ccd715d595e8d8307500",
    "gasUsed": "0x0",
    "governanceData": "0x",
    "hash": "0xe882d7a16f38126dc0c507f990b3fe18fa2d3a380002538581327abe96ca6edc",
    "logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
    "number": "0x1e67",
    "parentHash": "0x28b1c054346c3bd083741c757a750dcabf94b6d50c7f87158753544e96e73550",
    "receiptsRoot": "0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470",
    "reward": "0x4b2c736fd05c2e2da3ccbd001a395a444f16a861",
    "stateRoot": "0xdf9885621c9e6e75912ca94d6987bcb1b54fef0e4a99cbec5e68f1ffc7468a78",
    "timestamp": "0x62130beb",
    "timestampFoS": "0x0",
    "transactionsRoot": "0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470"
  }
}

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