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12contract OptionsMarket is IOptionsMarket, OwnableUpgradeable, AuthorityUtil {
13  uint256 public registeredOptionsCount;
14  uint256 public activeOptionsCount;
15
16  uint256 public totalNotionalVolume;
17
18  address public override mainStableAsset;
19
20  uint16 public nextUnderlyingAssetIndex; // starts from 1
21
22  // Once registered, underlying asset cannot be removed (only can be disabled)
23  // index <> underlyingAsset <> optionsToken strongly connected (not able to update)
24  mapping (uint16 => address) public override indexToUnderlyingAsset; // index => underlyingAsset
25  mapping (address => uint16) public override underlyingAssetToIndex; // underlyingAsset => index
26  mapping (address => address) public override underlyingAssetToOptionsToken; // underlyingAsset => optionsToken
27  mapping (address => address) public override optionsTokenToUnderlyingAsset; // optionsToken => underlyingAsset
28  mapping (address => bool) public override isUnderlyingAssetActive; // check if underlying asset is active
29
30  mapping (bytes32 => Option) public options;
31
32  mapping (uint16 => uint256) public amountForUnderlyingAsset; // underlyingAssetIndex => totalAmount
33  mapping (uint16 => uint256) public notionalVolumeForUnderlyingAsset; // underlyingAssetIndex => totalNotionalVolume
34  
35  event SetMainStableAsset(address indexed mainStableAsset);
36  event AddUnderlyingAsset(uint16 indexed underlyingAssetIndex, address indexed underlyingAsset, address optionsToken);
37  event UpdateOptionsToken(address indexed underlyingAsset, address optionsToken);
38  event SetIsUnderlyingAsset(address indexed underlyingAsset, bool isUnderlyingAssetActive);
39  
40  event OptionStatusChanged(bytes32 indexed id, address indexed underlyingAsset, uint40 indexed expiry, uint48 strikePrice, bool isActive);
41  event IncreaseAmountAndNotionalVolume(bytes32 indexed id, address indexed underlyingAsset, uint40 indexed expiry, uint48 strikePrice, uint256 amount, uint256 notionalVolume);
42  
43  function initialize(IOptionsAuthority _authority) public initializer {