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:

Expect that all properties are optional.

Object - The transaction call object

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

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

• gas: QUANTITY - Integer of the gas provided for the transaction execution. eth_call consumes zero gas, but this parameter may be needed by some executions.

• gasPrice: QUANTITY - Integer of the gasPrice used for each paid gas

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

• data: DATA - Hash of the method signature and encoded parameters. For details see Ethereum Contract ABI in the Solidity documentation

• QUANTITY|TAG - integer block number, or the string "latest", see the default block paramete

Returns:

QUANTITY - the amount of gas used.

Example:

// Request
curl https://ethereum.blockpi.network/v1/rpc/your-rpc-key -X POST -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_estimateGas","params":[{"from":"0xDAFEA492D9c6733ae3d56b7Ed1ADB60692c98Bc5","to":"0xDAFEA492D9c6733ae3d56b7Ed1ADB60692c98Bc5","value":"0x186a0"}],"id":1}'

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