eth_feeHistory

Returns transaction base fee and effective priority fee history for the requested block range on Avalanche C-Chain.

Parameters

1. QUANTITY - Number of blocks in the requested range. Between 1 and 1024 blocks can be requested in a single query.
2. QUANTITY|TAG - Highest number block of the requested range, or the string "latest"
3. Array - (optional) A monotonically increasing list of percentile values to sample from each block's effective priority fees per gas in ascending order, weighted by gas used.

{
  "jsonrpc": "2.0",
  "method": "eth_feeHistory",
  "params": [
    "0x4",
    "latest",
    [25, 75]
  ],
  "id": 1
}

Returns

Object - Fee history for the returned block range which can be a subsection of the requested range if not all blocks are available:

• oldestBlock: QUANTITY - Lowest number block of returned range.
• baseFeePerGas: Array - Array of block base fees per gas.
• gasUsedRatio: Array - Array of block gas used ratios.
• reward: Array - Array of effective priority fee per gas data points from a single block.

Implementation Example

cURL

curl -X POST https://api-avalanche-mainnet-archive.n.dwellir.com/YOUR_API_KEY/ext/bc/C/rpc \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_feeHistory",
    "params": [
      "0x4",
      "latest",
      [25, 75]
    ],
    "id": 1
  }'

JavaScript

const response = await fetch('https://api-avalanche-mainnet-archive.n.dwellir.com/YOUR_API_KEY/ext/bc/C/rpc', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    jsonrpc: '2.0',
    method: 'eth_feeHistory',
    params: [
      '0x4',
      'latest',
      [25, 75]
    ],
    id: 1
  })
});

const data = await response.json();
console.log(data.result);

Response Example

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "oldestBlock": "0x10d4f",
    "baseFeePerGas": [
      "0x7",
      "0x7",
      "0x7",
      "0x7",
      "0x7"
    ],
    "gasUsedRatio": [
      0.026089875,
      0.406803,
      0.0,
      0.0
    ],
    "reward": [
      [
        "0x77359400",
        "0x77359400"
      ],
      [
        "0x0",
        "0x0"
      ],
      [
        "0x0",
        "0x0"
      ],
      [
        "0x0",
        "0x0"
      ]
    ]
  }
}

Note: Use this method to analyze fee trends on Avalanche C-Chain for optimal transaction pricing with EIP-1559.

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Need help? Contact our support team or check the Avalanche documentation.