> For the complete documentation index, see [llms.txt](https://tutorial.neoline.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tutorial.neoline.io/reference/neo3-provider-api-legacy/write-methods/invoke.md).

# invoke

Invoke allows for the generic execution of smart contracts on behalf of the user. It is reccommended to have a general understanding of the NEO blockchain, and to be able successfully use all other commands listed previously in this document before attempting a generic contract execution.

## **Input Arguments**

<table><thead><tr><th width="365">Parameter</th><th>Description</th></tr></thead><tbody><tr><td><code>scriptHash: string</code></td><td>Script hash of the smart contract to invoke</td></tr><tr><td><code>operation: string</code></td><td>Operation on the smart contract to call</td></tr><tr><td><code>args:</code> <a href="/pages/rXB7bxkMWK9PL7o1S4NL#argument"><img src="http://localhost:8080/assets/images/info.svg" alt="i"></a><code>Argument[]</code></td><td>Any input arguments for the operation</td></tr><tr><td><code>fee?: string</code></td><td>The parsed amount of network fee (in GAS) to include with transaction</td></tr><tr><td><code>extraSystemFee?: string</code></td><td>This fee will be added to system fee</td></tr><tr><td><code>overrideSystemFee?: string</code></td><td>This fee will override the system fee</td></tr><tr><td><code>broadcastOverride?: boolean</code></td><td>In the case that the dApp would like to be responsible for broadcasting the signed transaction rather than the wallet provider</td></tr><tr><td><code>signers:</code> <a href="/pages/V8k8yTt2mQwID5CyTYZb#signer"><img src="http://localhost:8080/assets/images/info.svg" alt="i"></a><code>Signers[]</code></td><td>Sender and the effective scope of signature</td></tr></tbody></table>

### Argument

<table><thead><tr><th width="392">Parameter</th><th>Description</th></tr></thead><tbody><tr><td><code>type: 'String' | 'Boolean' | 'Hash160' | 'Hash256' | 'Integer' | 'ByteArray' | 'Array' | 'Address'</code></td><td>The type of the argument with you are using</td></tr><tr><td><code>value: any</code></td><td>String representation of the argument which you are using</td></tr></tbody></table>

In the case where the "broadcastOverride" input argument is set to True.

<table><thead><tr><th width="283">Parameter</th><th>Description</th></tr></thead><tbody><tr><td><code>signedTx: string</code></td><td>The serialized signed transaction. Only returned if the broadcastOverride input argument was set to True</td></tr></tbody></table>

## **Error Response**

<table><thead><tr><th width="289">Parameter</th><th>Description</th></tr></thead><tbody><tr><td><code>type: string</code></td><td>The type of error which has occured</td></tr><tr><td><code>description: string</code></td><td>A description of the error which has occured</td></tr><tr><td><code>data: string</code></td><td>Any raw data associated with the error</td></tr></tbody></table>

## Example

### Request

```js
neolineN3.invoke({
    scriptHash: '0x1415ab3b409a95555b77bc4ab6a7d9d7be0eddbd',
    operation: 'transfer',
    args: [
        {
            type: "Address",
            value: "NaUjKgf5vMuFt7Ffgfffcpc41uH3adx1jq",
        },
        {
            type: "Address",
            value: "NaUjKgf5vMuFt7Ffgfffcpc41uH3adx1jq",
        },
        {
            type: "Integer",
            value: "1",
        },
        {
            type: "Any",
            value: null,
        }
    ],
    fee: '0.0001',
    broadcastOverride: false,
    signers: [
        {
            account: "2cab903ff032ac693f8514581665be534beac39f",
            scopes: 16,
            allowedContracts: ["0x1415ab3b409a95555b77bc4ab6a7d9d7be0eddbd", "0xef4073a0f2b305a38ec4050e4d3d28bc40ea63f5"],
            allowedGroups: []
        }
    ]
})
.then(result => {
    console.log('Invoke transaction success!');
    console.log('Transaction ID: ' + result.txid);
    console.log('RPC node URL: ' + result.nodeURL);
})
.catch((error) => {
    const {type, description, data} = error;
    switch(type) {
        case 'NO_PROVIDER':
            console.log('No provider available.');
            break;
        case 'RPC_ERROR':
            console.log('There was an error when broadcasting this transaction to the network.');
            break;
        case 'CANCELED':
            console.log('The user has canceled this transaction.');
            break;
        default:
            // Not an expected error object.  Just write the error to the console.
            console.error(error);
            break;
    }
});
```

### Response

```js
{
    txid: '0xd6e4edeb66a75b79bec526d14664017eef9ccee5650c32facb1a4d4fe3640808',
    nodeURL: 'https://neo3-testnet.neoline.vip'
};
```