# Candy Shop Implementation
> Present implementation details

## Lottery
* **Governance Contract**:- To manage key variables of the lottery.
* Fees per swap
* Proxy contract address of lending function(Compound & aave) & Swap function(Uniswap for now).
* Lottery Duration
* Cost per candy
* Threshold Amount.
* Admins
* required Functions to change the above key variables by the admin.

* **Lottery Contract**:- User interact with this contract and whole lottery logic goes here. Assets are stored here.
* Start new draw function
* Reward and clear the prize pool function.
* Swap Function.
* Sponsor Deposit and withdrawal function.
* Mapping of candies to user for each draw.
* Mapping of supported Stable tokens.
* Mapping of sponsor principal amount.
* Mapping of Each Lottery details(total Tickets, start time, end time, status of lottery)

* **Lending Proxy Contract**:- Deposit and withdraw function of different protocols are present here.
* **Swap Proxy Contract**:- Swap Function of different dex are present here.

Note: Proxy contracts can be changeable only for the next draw. If changed also will be using the old proxy for the current draw.

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**Lottery Flow**

* **Sponsorship** -
* Can deposit any desired token, then we will convert into supported stable coins deposit into lending protocols.
* Interest amount is used as prize money in the lottery.
* Can withdraw the principal amount only after the lottery is completed.

* **Swap** -
* User has an option whether the user can participate or not in the lottery.
* Principal amount + interest amount will be used in the prize pool.
* ***Small Swap***(Below threshold amount) -
* Fee amount is calculated by the amount user wants to swap.
* Fee amount collected from the user will be converted into supported stable coins if it's not a stable coin.
* Fee Amount `x` is converted into candies. `no of candies = x / candyPrice`
* Fee amount `x` is deposited into lending protocols.

* ***Huge Swap***(Above threshold amount) -
* Fee Amount is calculated and collected from the arbs profit.
* If the user wants to participate in the lottery, then profits from arbs are split into two parts `80%` of the profits are given back to the user and `20%` of the profits are deposited into lending protocols
* If the user opts out from the lottery, then profits from arbs are split into two parts `90%` of the profits are given back to the user and `10%` of the profits are deposited into lending protocols