Move token whitelist and price feeds management to Factory contract.

[TomasDmArg]

Description: Move token whitelist and price feed management to the Factory contract to reduce gas costs and simplify wallet management.

Note: It could not be possible due to entrypoint stake increased minimum. We had issues before with Beacons, but not using Factory or UpgradeableBeacon.

Tasks:

• Add state variables to ChatterPayWalletFactory.sol:

  // Add to state variables
  mapping(address => bool) public globalWhitelistedTokens;
  mapping(address => address) public globalPriceFeeds;

• Add management functions to ChatterPayWalletFactory:

  /**
   * @notice Sets global token whitelist and price feed
   * @param token Token address
   * @param status Whitelist status
   * @param priceFeed Oracle price feed address
   */
  function setGlobalTokenWhitelistAndPriceFeed(
      address token,
      bool status,
      address priceFeed
  ) external onlyOwner {
      if (token == address(0)) revert ChatterPayWalletFactory__ZeroAddress();
      if (priceFeed == address(0)) revert ChatterPayWalletFactory__ZeroAddress();
      
      globalWhitelistedTokens[token] = status;
      if (status) {
          globalPriceFeeds[token] = priceFeed;
          emit GlobalPriceFeedUpdated(token, priceFeed);
      }
      emit GlobalTokenWhitelisted(token, status);
  }

• Modify ChatterPay.sol to check factory's whitelist:

  function isTokenWhitelisted(address token) public view returns (bool) {
      return s_state.whitelistedTokens[token] || s_state.factory.globalWhitelistedTokens(token);
  }
  
  function getPriceFeed(address token) public view returns (address) {
      address localFeed = s_state.priceFeeds[token];
      if (localFeed != address(0)) {
          return localFeed;
      }
      return s_state.factory.globalPriceFeeds(token);
  }

• Add required events to the Factory contract:

  event GlobalTokenWhitelisted(address indexed token, bool status);
  event GlobalPriceFeedUpdated(address indexed token, address indexed priceFeed);

• Create tests in a new file test/modules/FactoryTokenModule.t.sol to verify the functionality
• Update existing token tests to ensure compatibility with the new system

[dappsar]

📝 Audit Reference Note

Credit: @Magehernan