> For the complete documentation index, see [llms.txt](https://docs.algebra.finance/algebra-integral-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.algebra.finance/algebra-integral-documentation/algebra-v1-technical-reference/contracts/api-reference-v1.9-directional-fees.md).

# API Reference v1.9 - Directional Fees

Welcome to Algebra Protocol API v1.9 - Directional Fees Reference!

## Algebra V1.9 - Directional Fees API changelog

This document briefly describes major changes to Algebra V1.9 contracts that may be important for projects integrating the protocol.

[Algebra V1.9 - directional fees branch](https://github.com/cryptoalgebra/Algebra/tree/v1-modified-direction-based-fee)

### AlgebraPool changes

#### Customizable Tickpacing

In the first version of the protocol, tickspacing was an immutable constant within pools. In version 2, tickspacing can be changed at any time. This allows the protocol to more accurately and efficiently set up pools for different kinds of tokens. The default tickspacing is 60. Contracts interacting with Algebra V2 pools must take into account the possibility that tickspacing will change. MAX\_LIQUIDITY\_PER\_TICK is fixed based on tickspacing value 1.

#### Default Community Fee

You can also now configure what value of `communityFee` will be set in new pools by default. This makes it easier to set up new pools.

### Farming changes

#### Decrease Rewards

In version 1.9 the owner have the ability to withdraw some of the rewards from farms.


---

# 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.algebra.finance/algebra-integral-documentation/algebra-v1-technical-reference/contracts/api-reference-v1.9-directional-fees.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.