Fixed log decoding. Dynamic structures were not decoding properly. Now uses AbiEncoder from utils package.

contracts/erc1155/contracts/src/ERC1155.sol

@@ -17,6 +17,7 @@
 */
 
 pragma solidity ^0.5.9;
+pragma experimental ABIEncoderV2;
 
 import "@0x/contracts-utils/contracts/src/LibSafeMath.sol";
 import "@0x/contracts-utils/contracts/src/LibAddress.sol";

contracts/erc1155/contracts/src/ERC1155Mintable.sol

@@ -1,4 +1,23 @@
+/*
+
+  Copyright 2019 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
 pragma solidity ^0.5.9;
+pragma experimental ABIEncoderV2;
 
 import "@0x/contracts-utils/contracts/src/LibSafeMath.sol";
 import "./ERC1155.sol";

contracts/erc1155/contracts/src/MixinNonFungibleToken.sol

@@ -17,6 +17,7 @@
 */
 
 pragma solidity ^0.5.9;
+pragma experimental ABIEncoderV2;
 
 
 contract MixinNonFungibleToken {
@@ -64,7 +65,7 @@ contract MixinNonFungibleToken {
         // A base type has the NF bit but does has an index.
         return (id & TYPE_NF_BIT == TYPE_NF_BIT) && (id & NF_INDEX_MASK != 0);
     }
-    
+
     /// @dev returns owner of a non-fungible token
     function ownerOf(uint256 id) public view returns (address) {
         return nfOwners[id];

contracts/erc1155/contracts/src/interfaces/IERC1155.sol

@@ -17,13 +17,14 @@
 */
 
 pragma solidity ^0.5.9;
+pragma experimental ABIEncoderV2;
 
 
 /// @title ERC-1155 Multi Token Standard
 /// @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1155.md
 /// Note: The ERC-165 identifier for this interface is 0xd9b67a26.
 interface IERC1155 {
-    
+
     /// @dev Either TransferSingle or TransferBatch MUST emit when tokens are transferred,
     ///      including zero value transfers as well as minting or burning.
     /// Operator will always be msg.sender.

contracts/erc1155/contracts/src/interfaces/IERC1155Mintable.sol

@@ -1,4 +1,23 @@
+/*
+
+  Copyright 2019 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
 pragma solidity ^0.5.9;
+pragma experimental ABIEncoderV2;
 
 import "./IERC1155.sol";
 

contracts/erc1155/contracts/src/interfaces/IERC1155Receiver.sol

@@ -17,10 +17,11 @@
 */
 
 pragma solidity ^0.5.9;
+pragma experimental ABIEncoderV2;
 
 
 interface IERC1155Receiver {
-    
+
     /// @notice Handle the receipt of a single ERC1155 token type
     /// @dev The smart contract calls this function on the recipient
     /// after a `safeTransferFrom`. This function MAY throw to revert and reject the

contracts/exchange/test/wrapper_unit_tests.ts

@@ -139,8 +139,8 @@ blockchainTests('Exchange wrapper functions unit tests.', env => {
         expect(actual[13]).to.be.eq(expected.takerFeeAssetData);
     }
 
-    describe('fillOrKillOrder', () => {
-        it('works if the order is filled by exactly `takerAssetFillAmount`', async () => {
+    describe.only('fillOrKillOrder', () => {
+        it.only('works if the order is filled by exactly `takerAssetFillAmount`', async () => {
             const fillAmount = randomAmount();
             const order = randomOrder({
                 // `_fillOrder()` is overridden to always return `order.takerAssetAmount` as