Protocol upgrade fixes (#728)

* Make useModule backwards compatible

* Make deployToken backwards compatible (#726)

* Make deployToken backwards compatible

* Small fix for scheduledCheckpoint

contracts/ModuleRegistry.sol

@@ -118,6 +118,18 @@ contract ModuleRegistry is IModuleRegistry, EternalStorage {
         return IFeatureRegistry(getAddressValue(FEATURE_REGISTRY)).getFeatureStatus("customModulesAllowed");
     }
 
+
+    /**
+     * @notice Called by a SecurityToken (2.x) to check if the ModuleFactory is verified or appropriate custom module
+     * @dev ModuleFactory reputation increases by one every time it is deployed(used) by a ST.
+     * @dev Any module can be added during token creation without being registered if it is defined in the token proxy deployment contract
+     * @dev The feature switch for custom modules is labelled "customModulesAllowed"
+     * @param _moduleFactory is the address of the relevant module factory
+     */
+    function useModule(address _moduleFactory) external {
+        useModule(_moduleFactory, false);
+    }
+
     /**
      * @notice Called by a SecurityToken to check if the ModuleFactory is verified or appropriate custom module
      * @dev ModuleFactory reputation increases by one every time it is deployed(used) by a ST.
@@ -126,7 +138,7 @@ contract ModuleRegistry is IModuleRegistry, EternalStorage {
      * @param _moduleFactory is the address of the relevant module factory
      * @param _isUpgrade whether or not the function is being called as a result of an upgrade
      */
-    function useModule(address _moduleFactory, bool _isUpgrade) external nonReentrant {
+    function useModule(address _moduleFactory, bool _isUpgrade) public nonReentrant {
         if (_customModules()) {
             require(
                 getBoolValue(Encoder.getKey("verified", _moduleFactory)) || getAddressValue(Encoder.getKey("factoryOwner", _moduleFactory))

contracts/SecurityTokenRegistry.sol

@@ -108,7 +108,7 @@ contract SecurityTokenRegistry is EternalStorage, Proxy {
     // Emit when ownership of the ticker gets changed
     event ChangeTickerOwnership(string _ticker, address indexed _oldOwner, address indexed _newOwner);
     // Emit at the time of launching a new security token of version 3.0+
-    event NewSecurityTokenCreated(
+    event NewSecurityToken(
         string _ticker,
         string _name,
         address indexed _securityTokenAddress,
@@ -173,10 +173,14 @@ contract SecurityTokenRegistry is EternalStorage, Proxy {
      * @dev Throws if called by any account other than the owner.
      */
     modifier onlyOwner() {
-        require(msg.sender == owner(), "Only owner");
+        _onlyOwner();
         _;
     }
 
+    function _onlyOwner() internal view {
+        require(msg.sender == owner(), "Only owner");
+    }
+
     modifier onlyOwnerOrSelf() {
         require(msg.sender == owner() || msg.sender == address(this), "Only owner or self");
         _;
@@ -639,7 +643,7 @@ contract SecurityTokenRegistry is EternalStorage, Proxy {
                 _ticker, _name, newSecurityTokenAddress, issuer, now, issuer, false, _polyFee
             );
         } else {
-            emit NewSecurityTokenCreated(
+            emit NewSecurityToken(
                 _ticker, _name, newSecurityTokenAddress, issuer, now, issuer, false, _usdFee, _polyFee, _protocolVersion
             );
         }
@@ -691,15 +695,24 @@ contract SecurityTokenRegistry is EternalStorage, Proxy {
         internal
         returns(address newSecurityTokenAddress)
     {
+        // In v2.x of STFactory, the final argument to deployToken is the PolymathRegistry.
+        // In v3.x of STFactory, the final argument to deployToken is the Treasury wallet.
+        uint8[] memory upperLimit = new uint8[](3);
+        upperLimit[0] = 2;
+        upperLimit[1] = 99;
+        upperLimit[2] = 99;
+        if (VersionUtils.lessThanOrEqual(VersionUtils.unpack(uint24(_protocolVersion)), upperLimit)) {
+            _wallet = getAddressValue(POLYMATHREGISTRY);
+        }
+
         newSecurityTokenAddress = ISTFactory(getAddressValue(Encoder.getKey("protocolVersionST", _protocolVersion))).deployToken(
             _name,
             _ticker,
             18,
             _tokenDetails,
             _issuer,
             _divisible,
-            _wallet,
-            getAddressValue(POLYMATHREGISTRY)
+            _wallet
         );
 
         /*solium-disable-next-line security/no-block-members*/
@@ -739,7 +752,7 @@ contract SecurityTokenRegistry is EternalStorage, Proxy {
         set(Encoder.getKey("tickerToSecurityToken", ticker), _securityToken);
         _modifyTicker(_owner, ticker, registrationTime, expiryTime, true);
         _storeSecurityTokenData(_securityToken, ticker, _tokenDetails, _deployedAt);
-        emit NewSecurityTokenCreated(
+        emit NewSecurityToken(
             ticker, ISecurityToken(_securityToken).name(), _securityToken, _owner, _deployedAt, msg.sender, true, uint256(0), uint256(0), 0
         );
     }
@@ -951,5 +964,4 @@ contract SecurityTokenRegistry is EternalStorage, Proxy {
     function owner() public view returns(address) {
         return getAddressValue(OWNER);
     }
-
 }

contracts/interfaces/IModuleRegistry.sol

@@ -27,6 +27,12 @@ interface IModuleRegistry {
     event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
 
 
+    /**
+     * @notice Called by a security token (2.x) to notify the registry it is using a module
+     * @param _moduleFactory is the address of the relevant module factory
+     */
+    function useModule(address _moduleFactory) external;
+
     /**
      * @notice Called by a security token to notify the registry it is using a module
      * @param _moduleFactory is the address of the relevant module factory

contracts/interfaces/ISTFactory.sol

@@ -23,7 +23,6 @@ interface ISTFactory {
      * @param _issuer is the owner of the Security Token
      * @param _divisible whether the token is divisible or not
      * @param _treasuryWallet Ethereum address which will holds the STs.
-     * @param _polymathRegistry is the address of the Polymath Registry contract
      */
     function deployToken(
         string calldata _name,
@@ -32,10 +31,9 @@ interface ISTFactory {
         string calldata _tokenDetails,
         address _issuer,
         bool _divisible,
-        address _treasuryWallet,
-        address _polymathRegistry
-    ) 
-    external 
+        address _treasuryWallet //In v2.x this is the Polymath Registry
+    )
+    external
     returns(address tokenAddress);
 
     /**

contracts/modules/Experimental/Mixed/ScheduledCheckpoint.sol

@@ -57,6 +57,7 @@ contract ScheduledCheckpoint is ICheckpoint, TransferManager {
      */
     function addSchedule(bytes32 _name, uint256 _startTime, uint256 _interval, TimeUnit _timeUnit) external {
         _onlySecurityTokenOwner();
+        require(_name != bytes32(""), "Empty name");
         require(_startTime > now, "Start time must be in the future");
         require(schedules[_name].name == bytes32(0), "Name already in use");
         schedules[_name].name = _name;
@@ -75,6 +76,7 @@ contract ScheduledCheckpoint is ICheckpoint, TransferManager {
      */
     function removeSchedule(bytes32 _name) external {
         _onlySecurityTokenOwner();
+        require(_name != bytes32(""), "Empty name");
         require(schedules[_name].name == _name, "Name does not exist");
         uint256 index = schedules[_name].index;
         names[index] = names[names.length - 1];

contracts/tokens/STFactory.sol

@@ -80,8 +80,7 @@ contract STFactory is ISTFactory, Ownable {
         string calldata _tokenDetails,
         address _issuer,
         bool _divisible,
-        address _treasuryWallet,
-        address /* _polymathRegistry */
+        address _treasuryWallet
     )
         external
         returns(address)

test/k_module_registry.js

@@ -421,7 +421,6 @@ contract("ModuleRegistry", async (accounts) => {
                 assert.equal(tx.logs[1].args._ticker, newSymbol.toUpperCase());
                 I_SecurityToken2 = await SecurityToken.at(tx.logs[1].args._securityTokenAddress);
                 stGetter = await STGetter.at(I_SecurityToken2.address);
-                assert.equal(await stGetter.getTreasuryWallet.call(), account_issuer, "Incorrect wallet set")
                 let bytesData = encodeModuleCall(
                     ["uint256", "uint256", "uint256", "string"],
                     [await latestTime(), currentTime.add(new BN(duration.days(1))), cap, "Test STO"]