> For the complete documentation index, see [llms.txt](https://circular-protocol.gitbook.io/standard-apis/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://circular-protocol.gitbook.io/standard-apis/api-docs/dart/callcontract.md).

# callContract()

Method Signature

```dart
Future<Map<String, dynamic>> callContract(String blockchain, String from, String project, String request);
```

**Parameters**

| Name         | Type   | Description                                                                                                                 |
| ------------ | ------ | --------------------------------------------------------------------------------------------------------------------------- |
| `blockchain` | String | Blockchain address in hex                                                                                                   |
| `from`       | String | User's wallet address in hex                                                                                                |
| `project`    | String | Smart Contract's address in hex                                                                                             |
| `request`    | String | Requested function in string format (include the parenthesis and the semicolumn e.g. CRC\_Contract.\_\_GetContractName();). |

**Example**

```dart
import 'package:circular_api/circular_api.dart';

void main() {
    final circular = CircularAPI();

    final blockchain = "0x8a20baa40c45dc5055aeb26197c203e576ef389d9acb171bd62da11dc5ad72b2";
    final address = "0x248ea24763f3aeb2590114257b0b95ebc8fc40e287574aa25379bb24c6d661ec";
    final contractAddress = "0x77796a30a3f0744ca73975547a24f939a1b93e121b3b7f50663c92d38d437d86"
    final request = "CRC_Contract.__GetContractName();";
  
    final wallet = await circular.callContract(blockchain, address, contractAddress, request);
}
```

**Result**

The result will be an object of type Map\<String, dynamic>

{% tabs %}
{% tab title="200" %}

```json
{
    "Result": 200,
    "Response": "7b20225f506572666f726d616e636522203a2022487970657220436f646520457865637574696f6e2054696d653a20313130307573222c200a0a225f436f6e736f6c655f4f757470757422203a202235343635373337343230373336643631373237343230363336663665373437323631363337343061227d",
    "Node": "7bb5bd50729d6857942701d5673ea70ca1625f883230d8543970a452d1abe1c4"
}
```

Remember to convert the response from Hex to String if you want to get the result in plain text.
{% endtab %}

{% tab title="117" %}
Wrong function call. Remember to pass the request in Hex format as shown in the body section or to verify that the smart contract address is the right one.

```json
{
    "Result": 117,
    "Response": "4552524f523a57726f6e672046756e6374696f6e2043616c6c3a200a",
    "Node": "7bb5bd50729d6857942701d5673ea70ca1625f883230d8543970a452d1abe1c4"
}
```

{% endtab %}
{% endtabs %}


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