eth_estimateGas

Generates and returns an estimate of how much gas is necessary to allow the transaction to complete. The transaction will not be added to the blockchain.

Parameters

• Object - The transaction call object

  • from: DATA, 20 Bytes - (optional) The address the transaction is sent from.

  • to: DATA, 20 Bytes - The address the transaction is directed to.

  • gas: QUANTITY - (optional) Integer of the gas provided for the transaction execution. eth_call consumes zero gas, but this parameter may be needed by some executions. **NOTE: this parameter does not have limit or cap. **

  • gasPrice: QUANTITY - (optional) Integer of the gasPrice used for each paid gas.

  • value: QUANTITY - (optional) Integer of the value sent with this transaction

  • data: DATA - (optional) Hash of the method signature and encoded parameters. For details see Ethereum Contract ABI

• QUANTITY|TAG - integer block number, or the string "latest", "earliest" or "pending", see the default block parameter.

Returns

QUANTITY - the amount of gas used.

Request example

curl --location 'https://rpc.eth.gateway.fm' \
--header 'Content-Type: application/json' \
--data '{
    "jsonrpc": "2.0",
    "method": "eth_estimateGas",
    "params": [
        {
            "from": "0x3d14de87b5ade1c61a0b7ca29f7632e6e756b8bf",
            "to": "0x4c88153de66e84c6691fa6bf5b5823530300a942"
        }
    ],
    "id": 1
}'

Response example

{
    "jsonrpc": "2.0",
    "id": 1,
    "result": "0x5208"
}