> For the complete documentation index, see [llms.txt](https://croskulls-organization.gitbook.io/croskull/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://croskulls-organization.gitbook.io/croskull/ecosystem/bank.md).
# Bank
## What is The Bank and How it Works?
**Bonesville Bank** is the place where you can provide $**GRVE** or **GRAVE/CRO LP** and farm other rewards. We provide **2 different mechanism** that generate rewards for both **Single Token Staking** and **Liquidity Pool Tokens (LP Farm)**. In the [**Bank**](https://app.croskull.com/#/bank) section of our [Dapp](https://app.croskull.com/), you can find 2 different section:
* **Central Bank ( Stake $GRVE receive $RUDE )**
* **LP Farm ( Stake GRAVE/CRO LP Token receive $GRVE )**
* **LP Farm ( Stake GRAVE/CRO LP Token receive $RUDE )**
* **LP Farm ( Stake GRAVE/SLSS LP Token receive $RUDE )**
### Central Bank
**Central Bank** enable the Skullers to provide and lock their $**GRVE** for fixed period of time. When Claim user will receive the calculated $**RUDE** and the Staked $**GRVE** (minus a 0.3% burn fee).
To generate the ARY and rewards, the Central Banks uses a total dynamic algorithm based on the **Sigmoid Formula and some Contract Variables.** The Final user **ARY** is calculated based on:
* The lock-up period (14, 30, 60, 180 or 365 days) - **higher period = higher ARY**,
* The amount of staked $**GRVE** + total user [$GRVE](/croskull/erc20-tokens/grave-usdgrve.md) % share in the bank - **higher** [**$GRVE**](/croskull/erc20-tokens/grave-usdgrve.md) **amount = higher ARY** ,
* The amount of **Wishbone** + total user Wishbones % share in the bank ( wishbone is the main ARY Booster – you can use up to 300 wishbones per contract ).
The [$**RUDE**](/croskull/erc20-tokens/rude-usdrude.md) is paid out at the **end of the lock-up period** and the **ARY** ( Annualized Rude Yield ) will increase every minute while reaching the end.
#### Contract Calculator Tool
To make it easier to choose the **best ARY** for you, put in the amount of [$**GRVE**](/croskull/erc20-tokens/grave-usdgrve.md) you want to stake in the Calculator section, and play around with different amounts of **wishbones** (0-300, each wishbone costs 0.3 $GRVE) and **contract duration.**
Once you hit "**Calculate"** you will see the different options for lock-up periods and how much calculated [$**RUDE**](/croskull/erc20-tokens/rude-usdrude.md) rewards you will get at the end of the lock-up period.
#### Other details
{% hint style="success" %}
Bank max. **ARY** is equal to **333**%
{% endhint %}
{% hint style="success" %}
You can run **multiple contracts** at the same time
{% endhint %}
{% hint style="success" %}
ARY grows everyday and reach his **Final Value** while approaching the contract end date. ARY and rewards grows only when the contract is un-claimable.
{% endhint %}
{% hint style="info" %}
Max **Wishbones** amount allowed is equal to **300** ( costs 0.3 \* 300 = 90 $GRVE )
{% endhint %}
### GRAVE/CRO LP Farm
Providing Liquidity to our **LP GRAVE/CRO** enables you to **Stake** your LP Token and Farm [$**GRVE**](/croskull/erc20-tokens/grave-usdgrve.md) rewards. The LP Farm mechanism is simple, efficient and has low fees. Users can provide GRVE/CRO LP on both [**mm.finance**](https://mm.finance/swap) **and** [**croswap.com**](https://croswap.com/)**.**
Every confirmed block ( avg. 5s on cronos ) the contract will distribuite 0.10 [$**GRVE**](/croskull/erc20-tokens/grave-usdgrve.md) among all the stakeholders based on the share percent. Every day approximately 1000 [$**GRVE**](/croskull/erc20-tokens/grave-usdgrve.md) are released.
The LP Farm Contract has **Rewards** equal to **200 000** [**$GRVE**](/croskull/erc20-tokens/grave-usdgrve.md), that will be released until block number **4276755**.
Other available lp's are GRVE/CRO and GRVE/sSLS, with staking inside our bank's **LP Farm** section, both of which lets you farm [**$RUDE**](/croskull/erc20-tokens/rude-usdrude.md)**.**
---
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