POST
/
efb0a5eccd2caa5135eb54eba6f7f300
curl --request POST \
  --url https://optimism-mainnet.core.chainstack.com/efb0a5eccd2caa5135eb54eba6f7f300 \
  --header 'Content-Type: application/json' \
  --data '{
  "jsonrpc": "2.0",
  "method": "eth_estimateGas",
  "id": 1,
  "params": [
    {
      "from": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
      "to": "0xbe0eb53f46cd790cd13851d5eff43d12404d33e8"
    },
    "latest"
  ]
}'
{
  "jsonrpc": "<string>",
  "id": 123,
  "result": "<string>"
}

​
eth_estimateGas RPC Method

The eth_estimateGas method estimates the amount of gas required to execute a transaction. This is useful for understanding how much gas might be consumed by a transaction before actually sending it. The estimation is not always accurate but provides a good approximation.

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​
Request

To use eth_estimateGas, send a POST request with a JSON RPC call in the body.

​
Parameters

A single object containing:

  • from (string): (optional) The address the transaction is sent from.
  • to (string): The address the transaction is directed to.
  • gas (string): (optional) The gas limit provided by the sender.
  • gasPrice (string): (optional) The gas price for the transaction.
  • value (string): (optional) The value transferred for the transaction in Wei.
  • data (string): (optional) The data sent along with the transaction.

​
Response

The method returns the estimated gas required as a hexadecimal number.

  • result (string): The estimated gas required for the transaction.

​
Use case

The eth_estimateGas method is essential for:

  • Developers to estimate transaction costs before sending them.
  • Wallets and interfaces that calculate transaction fees.
  • Optimizing smart contract interactions by understanding gas requirements.

Body

application/json
​
jsonrpc
string
default:2.0
​
method
string
default:eth_estimateGas
​
id
integer
default:1
​
params
array

Response

200 - application/json
The estimated gas required
​
jsonrpc
string
​
id
integer
​
result
string