> For the complete documentation index, see [llms.txt](https://docs.vannalabs.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.vannalabs.ai/build/building-dapps/inference-example.md).

# Inference Example

### **Example smart contract**

Below is a smart contract that utilizes the `IVannaInference` interface to run inference on-chain.

```solidity
import "valence-inference-lib/src/IInference.sol";

contract InferenceExample {

    // Execute an ML model from Valence's storage layer, secured by ZKML
    function runZkmlModel() public {
        ModelInput memory modelInput = ModelInput(
            new NumberTensor[](1),
            new StringTensor[](0));

        Number[] memory numbers = new Number[](2);
        numbers[0] = Number(7286679744720459, 17); // 0.07286679744720459
        numbers[1] = Number(4486280083656311, 16); // 0.4486280083656311

        modelInput.numbers[0] = NumberTensor("input", numbers);

        ModelOutput memory output = INFERENCE_CONTRACT.runModel(
            IInference.ModelInferenceMode.ZK,
            ModelInferenceRequest(
                "QmbbzDwqSxZSgkz1EbsNHp2mb67rYeUYHYWJ4wECE24S7A",
                modelInput
        ));

        if (output.is_simulation_result == false) {
            resultNumber = output.numbers[0].values[0];
        } else {
            resultNumber = Number(0, 0);
        }
    }

    // Execute a Large Language Model directly in your smart contract
    function runLlm() public {
        string[] memory stopSequence = new string[](1);
        stopSequence[0] = "<end>";

        LlmResponse memory llmResult = INFERENCE_CONTRACT.runLlm(
            IInference.LlmInferenceMode.VANILLA,
            LlmInferenceRequest(
                "meta-llama/Meta-Llama-3-8B-Instruct",
                "Hello sir, who are you?\n<start>",
                1000,
                stopSequence,
                0
        ));

        if (llmResuklt.is_simulation_result) {
            resultString = "empty";
        } else {
            resultString = llmResult.answer;
        }
    }
}
```


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.vannalabs.ai/build/building-dapps/inference-example.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.