triggerConfirmedConstantContract

Trigger the read-only function of the contract ( they are the contract function which decorated by the pure and view modifiers), the query result is a solidified state.

Usage

const transactionWrapper = await tronWeb.transactionBuilder.triggerConfirmedConstantContract(contractAddress, functionSelector, options, parameters, ownerAddress);

Parameters

Argument	Description	Type
contractAddress	The smart contract address.	String
functionSelector	Function call, must not leave a blank space	String
options	Options when call contract function	TriggerSmartContractOptions
parameters	The parameter passed to functionSelector	Array<{ type: string, value: unknown }>
ownerAddress	Address in hex which calls the function	String

Returns

A wrapper which contains unsigned transaction object.

interface TransactionWrapper {
    result: {
        result: boolean;
    };
    /**
     * The transaction object created by calling contract function.
     */
    transaction: Transaction;
    /**
     * Energy used by triggering contract.
     */
    energy_used?: number;
    /**
     * The total penalty energy in the transaction
     */
    energy_penalty?: number;
    /**
     * Result of calling contract function which is decorated by `view` or `pure`.
     */
    constant_result?: string[];
}

Example

const parameter = [{ type: 'address', value: tronWeb.defaultAddress.base58 }];
const options = {
  feeLimit: 100000000,
  callValue: 0
}
transactionWrapper = await tronWeb.transactionBuilder.triggerConfirmedConstantContract("TGjgvdTWWrybVLaVeFqSyVqJQWjxqRYbaK", "balanceOf(address)", options,
    parameter,tronWeb.defaultAddress.base58);
console.log(transactionWrapper);
>{
    "result": {
        "result": true
    },
    "energy_used": 473,
    "constant_result": [
        "00000000000000000000000000000000000000000000000b84ddc1db6e378334"
    ],
    "transaction": {
        "ret": [
            {}
        ],
        "visible": false,
        "txID": "f166ca1f58e62dc70c8837b684f2ef3132cc2bf73d59f43091bb281e620055c7",
        "raw_data": {
            "contract": [
                {
                    "parameter": {
                        "value": {
                            "data": "70a08231000000000000000000000000573708726db88a32c1b9c828fef508577cfb8483",
                            "owner_address": "41573708726db88a32c1b9c828fef508577cfb8483",
                            "contract_address": "414a3a5dd265bd974b4de0bbe33faa7efb8b7b87e8"
                        },
                        "type_url": "type.googleapis.com/protocol.TriggerSmartContract"
                    },
                    "type": "TriggerSmartContract"
                }
            ],
            "ref_block_bytes": "7177",
            "ref_block_hash": "3bfbca3567020777",
            "expiration": 1694658258000,
            "timestamp": 1694658255514
        },
        "raw_data_hex": "0a02717722083bfbca356702077740d0c8838ca9315a8e01081f1289010a31747970652e676f6f676c65617069732e636f6d2f70726f746f636f6c2e54726967676572536d617274436f6e747261637412540a1541573708726db88a32c1b9c828fef508577cfb84831215414a3a5dd265bd974b4de0bbe33faa7efb8b7b87e8222470a08231000000000000000000000000573708726db88a32c1b9c828fef508577cfb8483709ab5838ca931"
    }
}