Merge branch 'v2-prototype' into feature/combinatorial-testing

* v2-prototype: (40 commits)
  Increase number of columns in relayer grid for small screens
  Make isValidSignature public
  Make batchFill methods return FIllResults struct
  Remove remove_tags script
  Small fixes
  Use semver package instead of getNextPatchVersion
  Use semver library instead of semverUtils
  small fixes
  Show all errors of a given kind at once rather then throwing after the first instance is encountered
  fix package.json
  Add more prepublish checks
  remove remove_tags script
  Create a shared Image component
  Adjust version in changelog
  Update RelayerGridTile render logic to incorportate colors and logos
  Add max width to top bar
  Set max-width for LargeLayout
  Finish last onboarding step
  Finish set allowance step
  Add onboarding assets
  ...

packages/contracts/src/contracts/current/protocol/AssetProxy/ERC20Proxy.sol

@@ -50,7 +50,35 @@ contract ERC20Proxy is
         address token = readAddress(assetData, 0);
 
         // Transfer tokens.
-        bool success = IERC20Token(token).transferFrom(from, to, amount);
+        // We do a raw call so we can check the success separate
+        // from the return data.
+        bool success = token.call(abi.encodeWithSelector(
+            IERC20Token(token).transferFrom.selector,
+            from,
+            to,
+            amount
+        ));
+        require(
+            success,
+            TRANSFER_FAILED
+        );
+        
+        // Check return data.
+        // If there is no return data, we assume the token incorrectly
+        // does not return a bool. In this case we expect it to revert
+        // on failure, which was handled above.
+        // If the token does return data, we require that it is a single
+        // value that evaluates to true.
+        assembly {
+            if returndatasize {
+                success := 0
+                if eq(returndatasize, 32) {
+                    // First 64 bytes of memory are reserved scratch space
+                    returndatacopy(0, 0, 32)
+                    success := mload(0)
+                }
+            }
+        }
         require(
             success,
             TRANSFER_FAILED

packages/contracts/src/contracts/current/protocol/Exchange/MixinSignatureValidator.sol

@@ -82,7 +82,7 @@ contract MixinSignatureValidator is
         address signer,
         bytes memory signature
     )
-        internal
+        public
         view
         returns (bool isValid)
     {

packages/contracts/src/contracts/current/protocol/Exchange/MixinWrapperFunctions.sol

@@ -263,40 +263,50 @@ contract MixinWrapperFunctions is
     /// @param orders Array of order specifications.
     /// @param takerAssetFillAmounts Array of desired amounts of takerAsset to sell in orders.
     /// @param signatures Proofs that orders have been created by makers.
+    /// @return Amounts filled and fees paid by makers and taker.
+    ///         NOTE: makerAssetFilledAmount and takerAssetFilledAmount may include amounts filled of different assets.
     function batchFillOrders(
         LibOrder.Order[] memory orders,
         uint256[] memory takerAssetFillAmounts,
         bytes[] memory signatures
     )
         public
+        returns (FillResults memory totalFillResults)
     {
         for (uint256 i = 0; i < orders.length; i++) {
-            fillOrder(
+            FillResults memory singleFillResults = fillOrder(
                 orders[i],
                 takerAssetFillAmounts[i],
                 signatures[i]
             );
+            addFillResults(totalFillResults, singleFillResults);
         }
+        return totalFillResults;
     }
 
     /// @dev Synchronously executes multiple calls of fillOrKill.
     /// @param orders Array of order specifications.
     /// @param takerAssetFillAmounts Array of desired amounts of takerAsset to sell in orders.
     /// @param signatures Proofs that orders have been created by makers.
+    /// @return Amounts filled and fees paid by makers and taker.
+    ///         NOTE: makerAssetFilledAmount and takerAssetFilledAmount may include amounts filled of different assets.
     function batchFillOrKillOrders(
         LibOrder.Order[] memory orders,
         uint256[] memory takerAssetFillAmounts,
         bytes[] memory signatures
     )
         public
+        returns (FillResults memory totalFillResults)
     {
         for (uint256 i = 0; i < orders.length; i++) {
-            fillOrKillOrder(
+            FillResults memory singleFillResults = fillOrKillOrder(
                 orders[i],
                 takerAssetFillAmounts[i],
                 signatures[i]
             );
+            addFillResults(totalFillResults, singleFillResults);
         }
+        return totalFillResults;
     }
 
     /// @dev Fills an order with specified parameters and ECDSA signature.
@@ -304,20 +314,25 @@ contract MixinWrapperFunctions is
     /// @param orders Array of order specifications.
     /// @param takerAssetFillAmounts Array of desired amounts of takerAsset to sell in orders.
     /// @param signatures Proofs that orders have been created by makers.
+    /// @return Amounts filled and fees paid by makers and taker.
+    ///         NOTE: makerAssetFilledAmount and takerAssetFilledAmount may include amounts filled of different assets.
     function batchFillOrdersNoThrow(
         LibOrder.Order[] memory orders,
         uint256[] memory takerAssetFillAmounts,
         bytes[] memory signatures
     )
         public
+        returns (FillResults memory totalFillResults)
     {
         for (uint256 i = 0; i < orders.length; i++) {
-            fillOrderNoThrow(
+            FillResults memory singleFillResults = fillOrderNoThrow(
                 orders[i],
                 takerAssetFillAmounts[i],
                 signatures[i]
             );
+            addFillResults(totalFillResults, singleFillResults);
         }
+        return totalFillResults;
     }
 
     /// @dev Synchronously executes multiple calls of fillOrder until total amount of takerAsset is sold by taker.

packages/contracts/src/contracts/current/protocol/Exchange/interfaces/ISignatureValidator.sol

@@ -39,4 +39,18 @@ contract ISignatureValidator {
         bool approval
     )
         external;
+
+    /// @dev Verifies that a signature is valid.
+    /// @param hash Message hash that is signed.
+    /// @param signer Address of signer.
+    /// @param signature Proof of signing.
+    /// @return Validity of order signature.
+    function isValidSignature(
+        bytes32 hash,
+        address signer,
+        bytes memory signature
+    )
+        public
+        view
+        returns (bool isValid);
 }

packages/contracts/src/contracts/current/protocol/Exchange/interfaces/IWrapperFunctions.sol

@@ -22,10 +22,7 @@ pragma experimental ABIEncoderV2;
 import "../libs/LibOrder.sol";
 import "../libs/LibFillResults.sol";
 
-contract IWrapperFunctions is
-    LibOrder,
-    LibFillResults
-{
+contract IWrapperFunctions {
     /// @dev Fills the input order. Reverts if exact takerAssetFillAmount not filled.
     /// @param order LibOrder.Order struct containing order specifications.
     /// @param takerAssetFillAmount Desired amount of takerAsset to sell.
@@ -56,35 +53,41 @@ contract IWrapperFunctions is
     /// @param orders Array of order specifications.
     /// @param takerAssetFillAmounts Array of desired amounts of takerAsset to sell in orders.
     /// @param signatures Proofs that orders have been created by makers.
+    /// @return Amounts filled and fees paid by makers and taker.
     function batchFillOrders(
         LibOrder.Order[] memory orders,
         uint256[] memory takerAssetFillAmounts,
         bytes[] memory signatures
     )
-        public;
+        public
+        returns (LibFillResults.FillResults memory totalFillResults);
 
     /// @dev Synchronously executes multiple calls of fillOrKill.
     /// @param orders Array of order specifications.
     /// @param takerAssetFillAmounts Array of desired amounts of takerAsset to sell in orders.
     /// @param signatures Proofs that orders have been created by makers.
+    /// @return Amounts filled and fees paid by makers and taker.
     function batchFillOrKillOrders(
         LibOrder.Order[] memory orders,
         uint256[] memory takerAssetFillAmounts,
         bytes[] memory signatures
     )
-        public;
+        public
+        returns (LibFillResults.FillResults memory totalFillResults);
 
     /// @dev Fills an order with specified parameters and ECDSA signature.
     ///      Returns false if the transaction would otherwise revert.
     /// @param orders Array of order specifications.
     /// @param takerAssetFillAmounts Array of desired amounts of takerAsset to sell in orders.
     /// @param signatures Proofs that orders have been created by makers.
+    /// @return Amounts filled and fees paid by makers and taker.
     function batchFillOrdersNoThrow(
         LibOrder.Order[] memory orders,
         uint256[] memory takerAssetFillAmounts,
         bytes[] memory signatures
     )
-        public;
+        public
+        returns (LibFillResults.FillResults memory totalFillResults);
 
     /// @dev Synchronously executes multiple calls of fillOrder until total amount of takerAsset is sold by taker.
     /// @param orders Array of order specifications.

packages/contracts/src/contracts/current/protocol/Exchange/mixins/MSignatureValidator.sol

@@ -35,18 +35,4 @@ contract MSignatureValidator is
         PreSigned,  // 0x07
         Trezor      // 0x08
     }
-
-    /// @dev Verifies that a signature is valid.
-    /// @param hash Message hash that is signed.
-    /// @param signer Address of signer.
-    /// @param signature Proof of signing.
-    /// @return Validity of order signature.
-    function isValidSignature(
-        bytes32 hash,
-        address signer,
-        bytes memory signature
-    )
-        internal
-        view
-        returns (bool isValid);
 }

packages/contracts/src/utils/revert_trace.ts

@@ -0,0 +1,21 @@
+import { devConstants } from '@0xproject/dev-utils';
+import { RevertTraceSubprovider, SolCompilerArtifactAdapter } from '@0xproject/sol-cov';
+import * as _ from 'lodash';
+
+let revertTraceSubprovider: RevertTraceSubprovider;
+
+export const revertTrace = {
+    getRevertTraceSubproviderSingleton(): RevertTraceSubprovider {
+        if (_.isUndefined(revertTraceSubprovider)) {
+            revertTraceSubprovider = revertTrace._getRevertTraceSubprovider();
+        }
+        return revertTraceSubprovider;
+    },
+    _getRevertTraceSubprovider(): RevertTraceSubprovider {
+        const defaultFromAddress = devConstants.TESTRPC_FIRST_ADDRESS;
+        const solCompilerArtifactAdapter = new SolCompilerArtifactAdapter();
+        const isVerbose = true;
+        const subprovider = new RevertTraceSubprovider(solCompilerArtifactAdapter, defaultFromAddress, isVerbose);
+        return subprovider;
+    },
+};

packages/contracts/src/utils/web3_wrapper.ts

@@ -2,9 +2,11 @@ import { devConstants, env, EnvVars, web3Factory } from '@0xproject/dev-utils';
 import { prependSubprovider } from '@0xproject/subproviders';
 import { logUtils } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
+import * as _ from 'lodash';
 
 import { coverage } from './coverage';
 import { profiler } from './profiler';
+import { revertTrace } from './revert_trace';
 
 enum ProviderType {
     Ganache = 'ganache',
@@ -48,10 +50,11 @@ const providerConfigs = testProvider === ProviderType.Ganache ? ganacheConfigs :
 export const provider = web3Factory.getRpcProvider(providerConfigs);
 const isCoverageEnabled = env.parseBoolean(EnvVars.SolidityCoverage);
 const isProfilerEnabled = env.parseBoolean(EnvVars.SolidityProfiler);
-if (isCoverageEnabled && isProfilerEnabled) {
-    throw new Error(
-        `Unfortunately for now you can't enable both coverage and profiler at the same time. They both use coverage.json file and there is no way to configure that.`,
-    );
+const isRevertTraceEnabled = env.parseBoolean(EnvVars.SolidityRevertTrace);
+const enabledSubproviderCount = _.filter([isCoverageEnabled, isProfilerEnabled, isRevertTraceEnabled], _.identity)
+    .length;
+if (enabledSubproviderCount > 1) {
+    throw new Error(`Only one of coverage, profiler, or revert trace subproviders can be enabled at a time`);
 }
 if (isCoverageEnabled) {
     const coverageSubprovider = coverage.getCoverageSubproviderSingleton();
@@ -71,5 +74,9 @@ if (isProfilerEnabled) {
     profilerSubprovider.stop();
     prependSubprovider(provider, profilerSubprovider);
 }
+if (isRevertTraceEnabled) {
+    const revertTraceSubprovider = revertTrace.getRevertTraceSubproviderSingleton();
+    prependSubprovider(provider, revertTraceSubprovider);
+}
 
 export const web3Wrapper = new Web3Wrapper(provider);