🔵 Base Chain RPC Methods & API Documentation

eth_estimateGas RPC Method

The eth_estimateGas method is used to estimate the amount of gas a transaction would consume if executed on the Base chain (an Ethereum L2 built by Coinbase). This estimation simulates the transaction and does not broadcast it to the blockchain.

⚠️ eth_estimateGas verifies that the sender (from) address has enough ETH to cover gas costs, even though the call itself doesn't consume gas.

Parameters

1. Transaction Call Object (required)

• from (optional) — Address sending the transaction.
• to (required) — Address the transaction is sent to.
• gas (optional) — Gas limit provided for the transaction execution.
• gasPrice (optional) — Price per unit of gas (in hexadecimal Wei).
• maxPriorityFeePerGas (optional) — Max fee per gas above the base fee.
• maxFeePerGas (optional) — Max total fee per gas (base + priority), in Wei.
• value (optional) — Amount of ETH to transfer (in hexadecimal Wei).
• data (optional) — ABI-encoded function call. More info: Ethereum ABI Spec (opens in a new tab)

💎 maxPriorityFeePerGas and maxFeePerGas (EIP-1559) must not be used with gasPrice in the same transaction.

💎 You can convert Wei to ETH using eth-converter.com (opens in a new tab). ETH on Base uses 18 decimals.

Returns

Returns the estimated gas (in hexadecimal) that the transaction would consume if sent.

Request Format

POST https://base-mainnet.chainnodes.org/YOUR-API-KEY
 

Example

curl https://base-mainnet.chainnodes.org/YOUR-API-KEY \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc":"2.0",
    "method":"eth_estimateGas",
    "params": [{
      "from": "0x47ac0Fb4F2D84898e4D9E7b4DaB3C24507a6D503",
      "to": "0xdAC17F958D2ee523a2206206994597C13D831ec7",
      "gas": "0x30D40",
      "gasPrice": "0x2E90EDD000",
      "value": "0x0",
      "data": "0xa9059cbb000000000000000000000000d6216fc19db775df9774a6e33526131da7d19a2c0000000000000000000000000000000000000000000000000000000005f5e100"
    }],
    "id": 1
  }'
 

Sample Response

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0xb411"
}

JSON-RPC API Documentation by CHAINNODES is based on Erigon node client. Contact us if you are interested in specific methods that are only available on geth, besu, Nethermind or reth