eth_feeHistory

curl --request POST \
  --url https://api.uniblock.dev/uni/v1/json-rpc?chainId=534352 \
  --header 'content-type: application/json' \
  --data '{
    "id": 1,
    "jsonrpc": "2.0",
    "method": "eth_feeHistory",
    "params": [
      "0x5",
      "latest",
      [
        20,
        30
      ]
    ]
  }'

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "oldestBlock": "0x14535f8",
    "baseFeePerGas": [
      "0x279c70a9b",
      "0x2a63ee068",
      "0x2a01a5449",
      "0x299fc09af",
      "..."
    ],
    "baseFeePerBlobGas": [
      "0xe3f5193b",
      "0xf6942037",
      "0xdb2e5553",
      "0xc2d3d9e8",
      "..."
    ],
    "gasUsedRatio": [
      0.7806543666666667,
      0.46377263333333335,
      0.46358696666666666,
      0.503863,
      "..."
    ],
    "blobGasUsedRatio": [
      0.8333333333333334,
      0,
      0,
      1,
      "..."
    ],
    "reward": [
      [
        "0x5f5e100",
        "0x34142698"
      ],
      [
        "0x5f5e100",
        "0x1f619e76"
      ],
      [
        "0x5f5e100",
        "0x39d10680"
      ],
      [
        "0x6824280",
        "0x214c9a15"
      ],
      "..."
    ]
  }
}

curl --request POST \
  --url https://api.uniblock.dev/uni/v1/json-rpc?chainId=534352 \
  --header 'content-type: application/json' \
  --data '{
    "id": 1,
    "jsonrpc": "2.0",
    "method": "eth_feeHistory",
    "params": [
      "0x5",
      "latest",
      [
        20,
        30
      ]
    ]
  }'

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "oldestBlock": "0x14535f8",
    "baseFeePerGas": [
      "0x279c70a9b",
      "0x2a63ee068",
      "0x2a01a5449",
      "0x299fc09af",
      "..."
    ],
    "baseFeePerBlobGas": [
      "0xe3f5193b",
      "0xf6942037",
      "0xdb2e5553",
      "0xc2d3d9e8",
      "..."
    ],
    "gasUsedRatio": [
      0.7806543666666667,
      0.46377263333333335,
      0.46358696666666666,
      0.503863,
      "..."
    ],
    "blobGasUsedRatio": [
      0.8333333333333334,
      0,
      0,
      1,
      "..."
    ],
    "reward": [
      [
        "0x5f5e100",
        "0x34142698"
      ],
      [
        "0x5f5e100",
        "0x1f619e76"
      ],
      [
        "0x5f5e100",
        "0x39d10680"
      ],
      [
        "0x6824280",
        "0x214c9a15"
      ],
      "..."
    ]
  }
}

Parameters

string

default:"534352"

required

Unique identifier for a blockchain network.

number

default:1

required

Request identifier used to match responses.

string

default:"2.0"

required

JSON-RPC version.

string

default:"eth_feeHistory"

required

JSON-RPC method name.

object

required

Parameters: [blockCount, newestBlock, rewardPercentiles]Positional parameters for eth_feeHistory:

params[0]: Hex-encoded number of blocks in the requested range (max: 0x400 / 1024 blocks).
params[1]: Newest block identifier: a hex block number or one of: “latest”, “earliest”, “pending”.
params[2]: Optional array of integers representing percentiles (ascending).

Returns

object

Historical gas fee statistics over the requested range of blocks.

Show properties

string

The lowest block number in the returned range (hex).

array

Base fee per gas for each block in the range, plus one for the next block.

Show items

string

array

Base fee per blob gas (EIP-4844). Zeroes for pre-4844 blocks.

Show items

string

array

Ratio of gas used to gas limit for each block.

Show items

number

array

Ratio of blob gas used to max blob gas per block (EIP-4844).

Show items

number

array

Effective priority fees per gas for specified percentiles across each block.

Show items

array

Show items

string

curl --request POST \
  --url https://api.uniblock.dev/uni/v1/json-rpc?chainId=534352 \
  --header 'content-type: application/json' \
  --data '{
    "id": 1,
    "jsonrpc": "2.0",
    "method": "eth_feeHistory",
    "params": [
      "0x5",
      "latest",
      [
        20,
        30
      ]
    ]
  }'

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "oldestBlock": "0x14535f8",
    "baseFeePerGas": [
      "0x279c70a9b",
      "0x2a63ee068",
      "0x2a01a5449",
      "0x299fc09af",
      "..."
    ],
    "baseFeePerBlobGas": [
      "0xe3f5193b",
      "0xf6942037",
      "0xdb2e5553",
      "0xc2d3d9e8",
      "..."
    ],
    "gasUsedRatio": [
      0.7806543666666667,
      0.46377263333333335,
      0.46358696666666666,
      0.503863,
      "..."
    ],
    "blobGasUsedRatio": [
      0.8333333333333334,
      0,
      0,
      1,
      "..."
    ],
    "reward": [
      [
        "0x5f5e100",
        "0x34142698"
      ],
      [
        "0x5f5e100",
        "0x1f619e76"
      ],
      [
        "0x5f5e100",
        "0x39d10680"
      ],
      [
        "0x6824280",
        "0x214c9a15"
      ],
      "..."
    ]
  }
}

Getting started

API Reference

Parameters

Returns