> For the complete documentation index, see [llms.txt](https://docs.hyperion.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.hyperion.xyz/developer/via-contract/features-available/open-position.md).

# Open position

## Function

For opening empty position , use `open_position`function in `pool_v3` module.

```
    public fun open_position(
        user: &signer,
        token_a: Object<Metadata>,
        token_b: Object<Metadata>,
        fee_tier: u8,
        tick_lower: u32,
        tick_upper: u32,
    ): Object<position_v3::Info> {
        ...
    }

```

`tick_lower`: the lower bound position's liquidity located at

`tick_upper`: the lower bound position's liquidity located at

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