---
title: triggerConfirmedConstantContract
---
# triggerConfirmedConstantContract <TitleWithCodeLink2 link="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

``` javascript
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`](../../Interact%20with%20contract#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.
```typescript
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

``` javascript
const parameter = [{ type: 'address', value: tronWeb.defaultAddress.base58 }];
const options = {
  feeLimit: 100000000,
  callValue: 0
}
const transactionWrapper = await tronWeb.transactionBuilder.triggerConfirmedConstantContract("TGjgvdTWWrybVLaVeFqSyVqJQWjxqRYbaK", "balanceOf(address)", options, parameter, tronWeb.defaultAddress.base58);
console.log(transactionWrapper);
// output-start
{
    "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"
    }
}
// output-end
```