Estimate the energy required to trigger the contract. This interface requires the fullnode node to enable the service. If the call is not enabled, an error will be reported. You can continue to use the triggerconstantcontract interface to estimate the energy. (v5.1.0 new interface)
Usage
tronWeb.transactionBuilder.estimateEnergy(contractAddress, functionSelector, options, parameter, issuerAddress);
Parameters
| Parameters | Parameter Description | Type |
|---|---|---|
| contractAddress | the smart contract address | hexString |
| functionSelector | function call, must not leave a blank space | String |
| options | optional fields (permission id, feelimit and other parameters) | Object |
| parameter | the parameter passed to 'function' | Array |
| issuerAddress | address that triggers the contract | hexString |
Return
Object
Example
>const result = await tronWeb.transactionBuilder.estimateEnergy(contractAddress, functionSelector, options, parameter, issuerAddress);
> {
"result": {...}, //The result section is the result of the triggerconstantcontract
"energy_required": 900000
}