eth_estimateGas
, which allows you to programmatically estimate the gas usage for a given transaction.
This estimation is done by simulating the transaction on a node, without actually broadcasting it.
from
, to
, data
(if interacting with a contract), and optionally value
if sending PEAQ or the respective native token. You don’t need the exact gas amount upfront; that’s what you’re estimating.
curl
, Postman
, web3.js
, ethers.js
, or any library that supports JSON-RPC) to make requests to the RPC endpoint. In our example below we’ll be sending a JSON payload using a curl
request to an RPC Endpoint.
eth_estimateGas
method to request a gas estimate. The parameters should describe the transaction you intend to send. For example:
"0x0"
curl
from your terminal, for example:
"result"
field is a hexadecimal string representing the estimated gas limit. For example, 0x5208
(in hex) is 21000
in decimal—typical for a simple ETH transfer.
eth_estimateGas
gives a good baseline, you may want to add a buffer (e.g., add 10-20% more) to ensure your transaction doesn’t fail if conditions change by the time it’s mined.gas
field to the estimated amount (plus any safety buffer). Consider the current gas price or fee structures (base fee + priority fee
) when calculating the total transaction cost.
eth_estimateGas
call over a JSON-RPC endpoint and parsing the response, you can accurately estimate the gas limit needed for your transaction on an EVM network. This helps ensure you neither waste gas nor have insufficient gas for a successful execution.