[Gas] kaia_feeHistory
Returns base fee per gas and transaction effective priority fee per gas history for the requested block range if available.
NOTE: This API is effective after Kaia v1.8.0
JSONRPC: kaia_feeHistory
Request
- application/json
Body
Array [
- IntegerBlockNumber
- HexadecimalBlockNumber
- BlockTag
]
params
undefined[]
required
Number of blocks in the requested range in hexadecimal. Between 1 (0x1) and 1024 (0x400) blocks can be requested in a single query. Less than requested may be returned if not all blocks are available.
BlockNumberOrTag
object
oneOf
the block number with type integer
number
the block number with type hexadecimal
string
the block tag [latest, pending, earliest]
string
An array of floating point values between 0 and 100.
Responses
- 200
Returns base fee per gas and transaction effective priority fee per gas history for the requested block range if available.
- application/json
- Schema
- Example (from schema)
Schema
error
object
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). |
A String providing a short description of the error. The message SHOULD be limited to a concise single sentence.
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
Lowest numbered block of the returned range in hexadecimal.
An array of block base fee per gas. This includes the next block after the newest of the returned range, because this value can be derived from the newest block. Zeroes are returned for pre-Magma blocks.
An array of the ratios of gas used per block. These are calculated as the ratio of gasUsed and gasLimit.
A 2D array of effective priority fees per gas. reward[n][i]
is the rewardPercentiles[i]-th
percentile effective priority fees per gas among the transactions in the block oldestBlock + n
. Only returned if rewardPercentiles is specified.
{
"jsonrpc": "2.0",
"id": 0,
"error": {
"code": -32700,
"message": "Parse error",
"data": "string"
},
"result": {
"oldestBlock": "0xa5b",
"reward": [
[
"0x0",
"0x0",
"0x0"
],
[
"0x5d21dba00",
"0x5d21dba00",
"0x5d21dba00"
]
],
"baseFeePerGas": [
"0x0",
"...",
"0x0"
],
"gasUsedRatio": [
0,
"...",
0.0002963777000002964
]
}
}