General description:

We want to create smart contract templates using the Fhenix FHE library. These templates are meant to serve as examples that developers can use to build their contract bases from. We want to aim to add familiar contract formats that developers are already familiar with so that they don’t need to start from scratch and can have a familiar point of reference in addition to the new logic changes that are required when working with FHE.

Requirements:

1. Complete Smart Contract – Must
2. Verified Contract on Testnet – Must
3. Contract Test Suite – Should

Architecture:

1. Contract deployment on Testnet
2. Link to GitHub Repository with Readme
3. Link to testnet deployment

Templates/Logic:

1. ERC-721
   1. Description: We are looking to build an erc-721 NFTs showcase contract. This can include obfuscating key fields such as the ownership mappings and ids. Additional options include encrypting aspects of the URI as well as including private fields in the state of the contract itself. Additional permissions based on the ownership of specific NFTs can be included. 
   2. Can include private ownership of tokens
   3. Private Metadata (and/or URI)
      1. Have part of JSON object encrypted via ownership of NFT – Nice
      2. Schema fields involving ciphertext
   4. Password as an NFT
      1. Dynamic controls for access
      2. IPFS unlock
         1. Aes256 iirc
   5. Integration with eAddress data type for mappings as values
2. Vesting Defi – import “@openzeppelin/contracts/finance/VestingWallet.sol”;
   1. Description: We are looking to create a new simple defi primitive that can be used for multiple different types of staking applications. Ideally users should have the option to stake their tokens for a reward over time, while maintaining privacy. Basically we want to hide certain features, specifically how much is being staked, how long is it being staked, and what is the reward. 
   2. Can include private ownership of tokens
   3. Useful primitive
      1. https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.0.1/contracts/finance/VestingWallet.sol
   4. FHE can be used here to hide a few fields
      1. How much is being Staked
      2. How Long it needs to be staked for
      3. Who is staking – Nice
   5. Eaddress integration for designation – Nice
   6. fhERC-20 integration – Should
3. Social Messaging Template
   1. Description: We are looking to create a template that can be used for social networking applications on Fhenix. One of the primary issues when dealing with web3 social applications is a lack of privacy. Ideally we would like to leverage FHE in order to allow users to connect privately, block certain users from using these features, and restrict view permission to those with certain assets. 
   2. Similar to our voting template, walks through conditional access
   3. Can write a specific message for a feed
      1. IPFS unlock
         1. Aes256 iirc – Nice
   4. Some sort of rating on Images
      1. Can view average ratings after 10 ratings
      2. Private rating system/rankings

Out of scope:

• Complete applications using these templates are out of scope for these bounties.
• Larger File encryption (social media)
• Scalable messaging (social media)
• restaking/rehypothecation (defi primitive)

Effort estimation: 2 Weeks

Prize: $1000 for each contract 

• In equivalent amount in crypto tokens

Internal Notes: 

• Controlled access for media is similar to this project
  • https://github.com/SolidityDrone/Fhedora/tree/fdcdd52a53d4ddf2a894dea6912d8ba6d8e09262