Update to solc 0.4.24

.npmignore

@@ -0,0 +1 @@
+contracts/test

.solcover.js

@@ -1,20 +1,8 @@
-// NOTE: Upgrading to solidity-coverage 0.4.x breaks our tests
-
-const libFiles = require('glob').sync('contracts/lib/**/*.sol').map(n => n.replace('contracts/', ''))
-const interfaces = [
-  'acl/IACL.sol',
-  'acl/IACLOracle.sol',
-  'acl/ACLSyntaxSugar.sol',
-  'common/IForwarder.sol',
-  'common/IVaultRecoverable.sol',
-  'evmscript/IEVMScriptExecutor.sol',
-  'kernel/IKernel.sol',
-]
+const skipFiles = ['lib', 'test', 'acl/ACLSyntaxSugar.sol']
 
 module.exports = {
     norpc: true,
     compileCommand: '../node_modules/.bin/truffle compile',
     testCommand: 'node --max-old-space-size=4096 ../node_modules/.bin/truffle test --network coverage',
-    skipFiles: interfaces.concat(libFiles),
-    copyNodeModules: true,
+    skipFiles,
 }

.soliumignore

@@ -1,2 +1,3 @@
 node_modules
 contracts/lib
+contracts/test

contracts/acl/ACL.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.4.18;
+pragma solidity 0.4.24;
 
 import "../apps/AragonApp.sol";
 import "./ACLSyntaxSugar.sol";
@@ -43,6 +43,7 @@ contract ACL is IACL, AragonApp, ACLHelpers {
     bytes32 constant public EMPTY_PARAM_HASH = 0x290decd9548b62a8d60345a988386fc84ba6bc95484008f6362f93160ef3e563;
     bytes32 constant public NO_PERMISSION = bytes32(0);
     address constant public ANY_ENTITY = address(-1);
+    uint256 constant ORACLE_CHECK_GAS = 30000;
 
     modifier onlyPermissionManager(address _app, bytes32 _role) {
         require(msg.sender == getPermissionManager(_app, _role));
@@ -170,12 +171,10 @@ contract ACL is IACL, AragonApp, ACLHelpers {
     function getPermissionParam(address _entity, address _app, bytes32 _role, uint _index)
         external
         view
-        returns (uint8 id, uint8 op, uint240 value)
+        returns (uint8, uint8, uint240)
     {
         Param storage param = permissionParams[permissions[permissionHash(_entity, _app, _role)]][_index];
-        id = param.id;
-        op = param.op;
-        value = param.value;
+        return (param.id, param.op, param.value);
     }
 
     /**
@@ -257,17 +256,17 @@ contract ACL is IACL, AragonApp, ACLHelpers {
     */
     function _setPermission(address _entity, address _app, bytes32 _role, bytes32 _paramsHash) internal {
         permissions[permissionHash(_entity, _app, _role)] = _paramsHash;
-        bool hasPermission = _paramsHash != NO_PERMISSION;
-        bool hasParams = hasPermission && _paramsHash != EMPTY_PARAM_HASH;
+        bool entityHasPermission = _paramsHash != NO_PERMISSION;
+        bool permissionHasParams = entityHasPermission && _paramsHash != EMPTY_PARAM_HASH;
 
-        SetPermission(_entity, _app, _role, hasPermission);
-        if (hasParams) {
-            SetPermissionParams(_entity, _app, _role, _paramsHash);
+        emit SetPermission(_entity, _app, _role, entityHasPermission);
+        if (permissionHasParams) {
+            emit SetPermissionParams(_entity, _app, _role, _paramsHash);
         }
     }
 
     function _saveParams(uint256[] _encodedParams) internal returns (bytes32) {
-        bytes32 paramHash = keccak256(_encodedParams);
+        bytes32 paramHash = keccak256(abi.encodePacked(_encodedParams));
         Param[] storage params = permissionParams[paramHash];
 
         if (params.length == 0) { // params not saved before
@@ -333,14 +332,21 @@ contract ACL is IACL, AragonApp, ACLHelpers {
         returns (bool)
     {
         if (Op(_param.op) == Op.IF_ELSE) {
-            var (condition, success, failure) = decodeParamsList(uint256(_param.value));
-            bool result = _evalParam(_paramsHash, condition, _who, _where, _what, _how);
+            uint32 conditionParam;
+            uint32 successParam;
+            uint32 failureParam;
 
-            return _evalParam(_paramsHash, result ? success : failure, _who, _where, _what, _how);
+            (conditionParam, successParam, failureParam) = decodeParamsList(uint256(_param.value));
+            bool result = _evalParam(_paramsHash, conditionParam, _who, _where, _what, _how);
+
+            return _evalParam(_paramsHash, result ? successParam : failureParam, _who, _where, _what, _how);
         }
 
-        var (v1, v2,) = decodeParamsList(uint256(_param.value));
-        bool r1 = _evalParam(_paramsHash, v1, _who, _where, _what, _how);
+        uint32 param1;
+        uint32 param2;
+
+        (param1, param2,) = decodeParamsList(uint256(_param.value));
+        bool r1 = _evalParam(_paramsHash, param1, _who, _where, _what, _how);
 
         if (Op(_param.op) == Op.NOT) {
             return !r1;
@@ -354,7 +360,7 @@ contract ACL is IACL, AragonApp, ACLHelpers {
             return false;
         }
 
-        bool r2 = _evalParam(_paramsHash, v2, _who, _where, _what, _how);
+        bool r2 = _evalParam(_paramsHash, param2, _who, _where, _what, _how);
 
         if (Op(_param.op) == Op.XOR) {
             return r1 != r2;
@@ -377,8 +383,13 @@ contract ACL is IACL, AragonApp, ACLHelpers {
         bytes4 sig = _oracleAddr.canPerform.selector;
 
         // a raw call is required so we can return false if the call reverts, rather than reverting
-        bool ok = address(_oracleAddr).call(sig, _who, _where, _what, 0x80, _how.length, _how);
-        // 0x80 is the position where the array that goes there starts
+        bytes memory checkCalldata = abi.encodeWithSelector(sig, _who, _where, _what, _how);
+        uint256 oracleCheckGas = ORACLE_CHECK_GAS;
+
+        bool ok;
+        assembly {
+            ok := staticcall(oracleCheckGas, _oracleAddr, add(checkCalldata, 0x20), mload(checkCalldata), 0, 0)
+        }
 
         if (!ok) {
             return false;
@@ -393,7 +404,7 @@ contract ACL is IACL, AragonApp, ACLHelpers {
         bool result;
         assembly {
             let ptr := mload(0x40)       // get next free memory ptr
-            returndatacopy(ptr, 0, size) // copy return from above `call`
+            returndatacopy(ptr, 0, size) // copy return from above `staticcall`
             result := mload(ptr)         // read data at ptr and set it to result
             mstore(ptr, 0)               // set pointer memory to 0 so it still is the next free ptr
         }
@@ -406,15 +417,15 @@ contract ACL is IACL, AragonApp, ACLHelpers {
     */
     function _setPermissionManager(address _newManager, address _app, bytes32 _role) internal {
         permissionManager[roleHash(_app, _role)] = _newManager;
-        ChangePermissionManager(_app, _role, _newManager);
+        emit ChangePermissionManager(_app, _role, _newManager);
     }
 
     function roleHash(address _where, bytes32 _what) internal pure returns (bytes32) {
-        return keccak256("ROLE", _where, _what);
+        return keccak256(abi.encodePacked("ROLE", _where, _what));
     }
 
     function permissionHash(address _who, address _where, bytes32 _what) internal pure returns (bytes32) {
-        return keccak256("PERMISSION", _who, _where, _what);
+        return keccak256(abi.encodePacked("PERMISSION", _who, _where, _what));
     }
 
     function time() internal view returns (uint64) { return uint64(block.timestamp); } // solium-disable-line security/no-block-members

contracts/acl/ACLSyntaxSugar.sol

@@ -2,11 +2,11 @@
  * SPDX-License-Identitifer:    MIT
  */
 
-pragma solidity ^0.4.18;
+pragma solidity ^0.4.24;
 
 
 contract ACLSyntaxSugar {
-    function arr() internal pure returns (uint256[] r) {}
+    function arr() internal pure returns (uint256[]) {}
 
     function arr(bytes32 _a) internal pure returns (uint256[] r) {
         return arr(uint256(_a));

contracts/acl/IACL.sol

@@ -2,10 +2,13 @@
  * SPDX-License-Identitifer:    MIT
  */
 
-pragma solidity ^0.4.18;
+pragma solidity ^0.4.24;
 
 
 interface IACL {
-    function initialize(address permissionsCreator) public;
+    function initialize(address permissionsCreator) external;
+
+    // TODO: this should be external
+    // See https://github.com/ethereum/solidity/issues/4832
     function hasPermission(address who, address where, bytes32 what, bytes how) public view returns (bool);
 }

contracts/acl/IACLOracle.sol

@@ -2,9 +2,9 @@
  * SPDX-License-Identitifer:    MIT
  */
 
-pragma solidity ^0.4.18;
+pragma solidity ^0.4.24;
 
 
 interface IACLOracle {
-    function canPerform(address who, address where, bytes32 what, uint256[] how) public view returns (bool);
+    function canPerform(address who, address where, bytes32 what, uint256[] how) external view returns (bool);
 }

contracts/apm/APMNamehash.sol

@@ -2,15 +2,15 @@
  * SPDX-License-Identitifer:    MIT
  */
 
-pragma solidity ^0.4.18;
+pragma solidity ^0.4.24;
 
 import "../ens/ENSConstants.sol";
 
 
 contract APMNamehash is ENSConstants {
-    bytes32 constant public APM_NODE = keccak256(ETH_TLD_NODE, keccak256("aragonpm"));
+    bytes32 constant public APM_NODE = keccak256(abi.encodePacked(ETH_TLD_NODE, keccak256("aragonpm")));
 
     function apmNamehash(string name) internal pure returns (bytes32) {
-        return keccak256(APM_NODE, keccak256(name));
+        return keccak256(abi.encodePacked(APM_NODE, keccak256(bytes(name))));
     }
 }

contracts/apm/APMRegistry.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.4.18;
+pragma solidity 0.4.24;
 
 import "../lib/ens/AbstractENS.sol";
 import "../ens/ENSSubdomainRegistrar.sol";
@@ -89,9 +89,9 @@ contract APMRegistry is AragonApp, AppProxyFactory, APMRegistryConstants {
 
         // Creates [name] subdomain in the rootNode and sets registry as resolver
         // This will fail if repo name already exists
-        bytes32 node = registrar.createNameAndPoint(keccak256(_name), repo);
+        bytes32 node = registrar.createNameAndPoint(keccak256(abi.encodePacked(_name)), repo);
 
-        NewRepo(node, _name, repo);
+        emit NewRepo(node, _name, repo);
 
         return repo;
     }
@@ -102,6 +102,6 @@ contract APMRegistry is AragonApp, AppProxyFactory, APMRegistryConstants {
     }
 
     function repoAppId() internal view returns (bytes32) {
-        return keccak256(registrar.rootNode(), keccak256(REPO_APP_NAME));
+        return keccak256(abi.encodePacked(registrar.rootNode(), keccak256(abi.encodePacked(REPO_APP_NAME))));
     }
 }

contracts/apm/Repo.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.4.18;
+pragma solidity 0.4.24;
 
 import "../apps/AragonApp.sol";
 
@@ -60,7 +60,7 @@ contract Repo is AragonApp {
         versionIdForSemantic[semanticVersionHash(_newSemanticVersion)] = versionId;
         latestVersionIdForContract[contractAddress] = versionId;
 
-        NewVersion(versionId, _newSemanticVersion);
+        emit NewVersion(versionId, _newSemanticVersion);
     }
 
     function getLatest() public view returns (uint16[3] semanticVersion, address contractAddress, bytes contentURI) {
@@ -114,6 +114,6 @@ contract Repo is AragonApp {
     }
 
     function semanticVersionHash(uint16[3] version) internal pure returns (bytes32) {
-        return keccak256(version[0], version[1], version[2]);
+        return keccak256(abi.encodePacked(version[0], version[1], version[2]));
     }
 }

contracts/apps/AppProxyBase.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.4.18;
+pragma solidity 0.4.24;
 
 import "./AppStorage.sol";
 import "../common/DepositableDelegateProxy.sol";
@@ -13,7 +13,7 @@ contract AppProxyBase is AppStorage, DepositableDelegateProxy, KernelConstants {
     * @param _appId Identifier for app
     * @param _initializePayload Payload for call to be made after setup to initialize
     */
-    function AppProxyBase(IKernel _kernel, bytes32 _appId, bytes _initializePayload) public {
+    constructor(IKernel _kernel, bytes32 _appId, bytes _initializePayload) public {
         setKernel(_kernel);
         setAppId(_appId);
 
@@ -33,6 +33,6 @@ contract AppProxyBase is AppStorage, DepositableDelegateProxy, KernelConstants {
     }
 
     function getAppBase(bytes32 _appId) internal view returns (address) {
-        return kernel().getApp(keccak256(APP_BASES_NAMESPACE, _appId));
+        return kernel().getApp(keccak256(abi.encodePacked(APP_BASES_NAMESPACE, _appId)));
     }
 }

contracts/apps/AppProxyPinned.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.4.18;
+pragma solidity 0.4.24;
 
 import "../common/UnstructuredStorage.sol";
 import "../common/IsContract.sol";
@@ -17,7 +17,7 @@ contract AppProxyPinned is IsContract, AppProxyBase {
     * @param _appId Identifier for app
     * @param _initializePayload Payload for call to be made after setup to initialize
     */
-    function AppProxyPinned(IKernel _kernel, bytes32 _appId, bytes _initializePayload)
+    constructor(IKernel _kernel, bytes32 _appId, bytes _initializePayload)
         AppProxyBase(_kernel, _appId, _initializePayload)
         public // solium-disable-line visibility-first
     {

contracts/apps/AppProxyUpgradeable.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.4.18;
+pragma solidity 0.4.24;
 
 import "./AppProxyBase.sol";
 
@@ -10,7 +10,7 @@ contract AppProxyUpgradeable is AppProxyBase {
     * @param _appId Identifier for app
     * @param _initializePayload Payload for call to be made after setup to initialize
     */
-    function AppProxyUpgradeable(IKernel _kernel, bytes32 _appId, bytes _initializePayload)
+    constructor(IKernel _kernel, bytes32 _appId, bytes _initializePayload)
         AppProxyBase(_kernel, _appId, _initializePayload)
         public // solium-disable-line visibility-first
     {

contracts/apps/AppStorage.sol

@@ -2,7 +2,7 @@
  * SPDX-License-Identitifer:    MIT
  */
 
-pragma solidity ^0.4.18;
+pragma solidity ^0.4.24;
 
 import "../common/UnstructuredStorage.sol";
 import "../kernel/IKernel.sol";

contracts/apps/AragonApp.sol

@@ -2,7 +2,7 @@
  * SPDX-License-Identitifer:    MIT
  */
 
-pragma solidity ^0.4.18;
+pragma solidity ^0.4.24;
 
 import "./AppStorage.sol";
 import "../common/Autopetrified.sol";

contracts/apps/UnsafeAragonApp.sol

@@ -2,7 +2,7 @@
  * SPDX-License-Identitifer:    MIT
  */
 
-pragma solidity ^0.4.18;
+pragma solidity ^0.4.24;
 
 import "../common/UnstructuredStorage.sol";
 import "./AragonApp.sol";
@@ -17,7 +17,7 @@ import "./AragonApp.sol";
 contract UnsafeAragonApp is AragonApp {
     using UnstructuredStorage for bytes32;
 
-    function UnsafeAragonApp() public {
+    constructor() public {
         // Removes auto petrifying; simulates a delete at INITIALIZATION_BLOCK_POSITION
         INITIALIZATION_BLOCK_POSITION.setStorageUint256(0);
     }

contracts/common/Autopetrified.sol

@@ -2,13 +2,13 @@
  * SPDX-License-Identitifer:    MIT
  */
 
-pragma solidity ^0.4.18;
+pragma solidity ^0.4.24;
 
 import "./Petrifiable.sol";
 
 
 contract Autopetrified is Petrifiable {
-    function Autopetrified() public {
+    constructor() public {
         // Immediately petrify base (non-proxy) instances of inherited contracts on deploy.
         // This renders them uninitializable (and unusable without a proxy).
         petrify();

contracts/common/DelegateProxy.sol

@@ -1,4 +1,4 @@
-pragma solidity 0.4.18;
+pragma solidity 0.4.24;
 
 import "../common/IsContract.sol";
 import "../lib/misc/ERCProxy.sol";