> For the complete documentation index, see [llms.txt](https://docs.hatom.com/getting-started/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.hatom.com/getting-started/hatoms-ecosystem/hatom-usd/ush-facilitators.md).

# USH Facilitators

At its core, [USH ](/getting-started/hatoms-ecosystem/hatom-usd.md)is an ESDT token owned by the **USH Minter Smart Contract**. Within this smart contract, [**Facilitators**](/getting-started/hatoms-ecosystem/hatom-usd/ush-facilitators.md) are defined as accounts that are entitled to mint and burn [**USH**](/getting-started/hatoms-ecosystem/hatom-usd.md). On the other hand, a Facilitator Pool represents a collection of facilitators that have an associated capacity $$C\_f$$, i.e. the upward limit of what they can mint on certain conditions.

The maximum amount of [**USH** ](/getting-started/hatoms-ecosystem/hatom-usd.md)that can be in circulation at any given point in time is the Maximum Supply, given by:

$$
S^{\text{USH}}*{\max}(t) = \sum*{f=1}^{F} C\_f(t).
$$

Each Facilitator Pool has an associated balance  given by the amount of USH minted minus the amount of USH burned:

$$
U\_f (t) = \text{USH}*{\text{minted}} (t) - \text{USH}*{\text{burned}} (t).
$$

It is important to know that this last amount might be negative, given that the amount of USH burned can be higher than the amount minted by that Facilitator Pool. At any point in time, the amount of USH that a [**Facilitator** ](/getting-started/hatoms-ecosystem/hatom-usd/ush-facilitators.md)can mint depends on the difference between the balance and capacity of the [**Facilitator Pool**](/getting-started/hatoms-ecosystem/hatom-usd/ush-facilitators.md) to which it belongs:

$$
A^{\text{USH}}\_{i \in f}(t) = C\_f(t) - U\_f.
$$

Finally, the Circulating Supply of USH $$S$$ at any given point in time is given by:

$$
S\_{\text{USH}}(t) = \sum\_{f=1}^{F} U\_f(t).
$$

Facilitator Pools can be very different in technical nature. However, the first two pools will be given by:

* [**Hatom’s Lending Protocol**](/getting-started/hatoms-ecosystem/hatom-usd/ush-facilitators/lending-protocol-facilitator.md), in production since July 2023,
* [**Hatom’s Isolated Pools**](/getting-started/hatoms-ecosystem/hatom-usd/ush-facilitators/isolated-pools-facilitator.md), going into production alongside USH launch.