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

* v2-prototype:
  Improve 'web3-provider-engine' typings
  Fix build
  Update artifacts
  Add more revert reasons to tests
  Make dispatchTransferFrom revert with reason from AssetProxy on failure
  Remove redundant files, hard code function selector in dispatchTransferFrom, and modify revert reason
  Updated offset of receiverData length to reflect new assetData encoding.
  ERC20 Custom storage layout
  Golf the authorization check
  ERC20 manual memory layout
  ERC20 inline return
  ERC721 inline return
  Golf ERC721 transferFrom
  Inline ERC20 tranferFrom selector constant
  Optimize ERC20 transferFrom
  Polish asset picker layout
  Update relayer grid fallback icon
  Change metamask install link based on browser
  Use ethereumjs-tx@1.3.5 instead of our fork

# Conflicts:
#	packages/contracts/test/asset_proxy/proxies.ts
#	packages/contracts/test/exchange/core.ts
#	packages/migrations/artifacts/2.0.0/DummyERC721Token.json

3 files changed, 12 insertions, 208 deletions

diff --git a/packages/contracts/test/asset_proxy/authorizable.ts b/packages/contracts/test/asset_proxy/authorizable.ts
index c2295dda6..8c9d0495d 100644
--- a/packages/contracts/test/asset_proxy/authorizable.ts
+++ b/packages/contracts/test/asset_proxy/authorizable.ts
@@ -5,10 +5,7 @@ import * as chai from 'chai';
 
 import { MixinAuthorizableContract } from '../../src/generated_contract_wrappers/mixin_authorizable';
 import { artifacts } from '../../src/utils/artifacts';
-import {
-    expectRevertOrAlwaysFailingTransactionAsync,
-    expectRevertReasonOrAlwaysFailingTransactionAsync,
-} from '../../src/utils/assertions';
+import { expectRevertReasonOrAlwaysFailingTransactionAsync } from '../../src/utils/assertions';
 import { chaiSetup } from '../../src/utils/chai_setup';
 import { constants } from '../../src/utils/constants';
 import { provider, txDefaults, web3Wrapper } from '../../src/utils/web3_wrapper';
@@ -118,10 +115,11 @@ describe('Authorizable', () => {
                 constants.AWAIT_TRANSACTION_MINED_MS,
             );
             const index = new BigNumber(0);
-            return expectRevertOrAlwaysFailingTransactionAsync(
+            return expectRevertReasonOrAlwaysFailingTransactionAsync(
                 authorizable.removeAuthorizedAddressAtIndex.sendTransactionAsync(address, index, {
                     from: notOwner,
                 }),
+                RevertReason.OnlyContractOwner,
             );
         });
         it('should throw if index is >= authorities.length', async () => {
@@ -130,18 +128,20 @@ describe('Authorizable', () => {
                 constants.AWAIT_TRANSACTION_MINED_MS,
             );
             const index = new BigNumber(1);
-            return expectRevertOrAlwaysFailingTransactionAsync(
+            return expectRevertReasonOrAlwaysFailingTransactionAsync(
                 authorizable.removeAuthorizedAddressAtIndex.sendTransactionAsync(address, index, {
                     from: owner,
                 }),
+                RevertReason.IndexOutOfBounds,
             );
         });
         it('should throw if owner attempts to remove an address that is not authorized', async () => {
             const index = new BigNumber(0);
-            return expectRevertOrAlwaysFailingTransactionAsync(
+            return expectRevertReasonOrAlwaysFailingTransactionAsync(
                 authorizable.removeAuthorizedAddressAtIndex.sendTransactionAsync(address, index, {
                     from: owner,
                 }),
+                RevertReason.TargetNotAuthorized,
             );
         });
         it('should throw if address at index does not match target', async () => {
@@ -156,10 +156,11 @@ describe('Authorizable', () => {
                 constants.AWAIT_TRANSACTION_MINED_MS,
             );
             const address1Index = new BigNumber(0);
-            return expectRevertOrAlwaysFailingTransactionAsync(
+            return expectRevertReasonOrAlwaysFailingTransactionAsync(
                 authorizable.removeAuthorizedAddressAtIndex.sendTransactionAsync(address2, address1Index, {
                     from: owner,
                 }),
+                RevertReason.AuthorizedAddressMismatch,
             );
         });
         it('should allow owner to remove an authorized address', async () => {
diff --git a/packages/contracts/test/asset_proxy/decoder.ts b/packages/contracts/test/asset_proxy/decoder.ts
deleted file mode 100644
index 902255caf..000000000
--- a/packages/contracts/test/asset_proxy/decoder.ts
+++ /dev/null
@@ -1,84 +0,0 @@
-import { BlockchainLifecycle } from '@0xproject/dev-utils';
-import { assetProxyUtils, generatePseudoRandomSalt } from '@0xproject/order-utils';
-import { BigNumber } from '@0xproject/utils';
-import * as chai from 'chai';
-import ethUtil = require('ethereumjs-util');
-
-import { TestAssetDataDecodersContract } from '../../src/generated_contract_wrappers/test_asset_data_decoders';
-import { artifacts } from '../../src/utils/artifacts';
-import { chaiSetup } from '../../src/utils/chai_setup';
-import { provider, txDefaults, web3Wrapper } from '../../src/utils/web3_wrapper';
-
-chaiSetup.configure();
-const expect = chai.expect;
-const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
-
-describe('TestAssetDataDecoders', () => {
-    let testAssetProxyDecoder: TestAssetDataDecodersContract;
-    let testAddress: string;
-
-    before(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    after(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-    before(async () => {
-        // Setup accounts & addresses
-        const accounts = await web3Wrapper.getAvailableAddressesAsync();
-        testAddress = accounts[0];
-        testAssetProxyDecoder = await TestAssetDataDecodersContract.deployFrom0xArtifactAsync(
-            artifacts.TestAssetDataDecoders,
-            provider,
-            txDefaults,
-        );
-    });
-    beforeEach(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    afterEach(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-
-    describe('Asset Data Decoders', () => {
-        it('should correctly decode ERC721 asset data', async () => {
-            const tokenId = generatePseudoRandomSalt();
-            const encodedAssetData = assetProxyUtils.encodeERC721AssetData(testAddress, tokenId);
-            const expectedDecodedAssetData = assetProxyUtils.decodeERC721AssetData(encodedAssetData);
-            let decodedTokenAddress: string;
-            let decodedTokenId: BigNumber;
-            let decodedData: string;
-            [
-                decodedTokenAddress,
-                decodedTokenId,
-                decodedData,
-            ] = await testAssetProxyDecoder.publicDecodeERC721Data.callAsync(encodedAssetData);
-            expect(decodedTokenAddress).to.be.equal(expectedDecodedAssetData.tokenAddress);
-            expect(decodedTokenId).to.be.bignumber.equal(expectedDecodedAssetData.tokenId);
-            expect(decodedData).to.be.equal(expectedDecodedAssetData.receiverData);
-        });
-
-        it('should correctly decode ERC721 asset data with receiver data', async () => {
-            const tokenId = generatePseudoRandomSalt();
-            const receiverDataFirst32Bytes = ethUtil.bufferToHex(
-                assetProxyUtils.encodeUint256(generatePseudoRandomSalt()),
-            );
-            const receiverDataExtraBytes = 'FFFF';
-            // We add extra bytes to generate a value that doesn't fit perfectly into one word
-            const receiverData = receiverDataFirst32Bytes + receiverDataExtraBytes;
-            const encodedAssetData = assetProxyUtils.encodeERC721AssetData(testAddress, tokenId, receiverData);
-            const expectedDecodedAssetData = assetProxyUtils.decodeERC721AssetData(encodedAssetData);
-            let decodedTokenAddress: string;
-            let decodedTokenId: BigNumber;
-            let decodedReceiverData: string;
-            [
-                decodedTokenAddress,
-                decodedTokenId,
-                decodedReceiverData,
-            ] = await testAssetProxyDecoder.publicDecodeERC721Data.callAsync(encodedAssetData);
-            expect(decodedTokenAddress).to.be.equal(expectedDecodedAssetData.tokenAddress);
-            expect(decodedTokenId).to.be.bignumber.equal(expectedDecodedAssetData.tokenId);
-            expect(decodedReceiverData).to.be.equal(expectedDecodedAssetData.receiverData);
-        });
-    });
-});
diff --git a/packages/contracts/test/asset_proxy/proxies.ts b/packages/contracts/test/asset_proxy/proxies.ts
index 869ba4b2a..6303a50fa 100644
--- a/packages/contracts/test/asset_proxy/proxies.ts
+++ b/packages/contracts/test/asset_proxy/proxies.ts
@@ -5,7 +5,6 @@ import { BigNumber } from '@0xproject/utils';
 import * as chai from 'chai';
 import { LogWithDecodedArgs } from 'ethereum-types';
 import ethUtil = require('ethereumjs-util');
-import * as _ from 'lodash';
 
 import { DummyERC20TokenContract } from '../../src/generated_contract_wrappers/dummy_e_r_c20_token';
 import {
@@ -16,10 +15,7 @@ import { DummyERC721TokenContract } from '../../src/generated_contract_wrappers/
 import { ERC20ProxyContract } from '../../src/generated_contract_wrappers/e_r_c20_proxy';
 import { ERC721ProxyContract } from '../../src/generated_contract_wrappers/e_r_c721_proxy';
 import { artifacts } from '../../src/utils/artifacts';
-import {
-    expectRevertOrAlwaysFailingTransactionAsync,
-    expectRevertReasonOrAlwaysFailingTransactionAsync,
-} from '../../src/utils/assertions';
+import { expectRevertReasonOrAlwaysFailingTransactionAsync } from '../../src/utils/assertions';
 import { chaiSetup } from '../../src/utils/chai_setup';
 import { constants } from '../../src/utils/constants';
 import { ERC20Wrapper } from '../../src/utils/erc20_wrapper';
@@ -192,58 +188,6 @@ describe('Asset Transfer Proxies', () => {
             });
         });
 
-        describe('batchTransferFrom ERC20', () => {
-            it('should succesfully make multiple token transfers', async () => {
-                const erc20Balances = await erc20Wrapper.getBalancesAsync();
-
-                const encodedAssetData = assetProxyUtils.encodeERC20AssetData(zrxToken.address);
-                const amount = new BigNumber(10);
-                const numTransfers = 2;
-                const assetData = _.times(numTransfers, () => encodedAssetData);
-                const fromAddresses = _.times(numTransfers, () => makerAddress);
-                const toAddresses = _.times(numTransfers, () => takerAddress);
-                const amounts = _.times(numTransfers, () => amount);
-
-                const txHash = await erc20Proxy.batchTransferFrom.sendTransactionAsync(
-                    assetData,
-                    fromAddresses,
-                    toAddresses,
-                    amounts,
-                    { from: exchangeAddress },
-                );
-                const res = await web3Wrapper.awaitTransactionSuccessAsync(
-                    txHash,
-                    constants.AWAIT_TRANSACTION_MINED_MS,
-                );
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-
-                expect(res.logs.length).to.equal(numTransfers);
-                expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][zrxToken.address].minus(amount.times(numTransfers)),
-                );
-                expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][zrxToken.address].add(amount.times(numTransfers)),
-                );
-            });
-
-            it('should throw if not called by an authorized address', async () => {
-                const encodedAssetData = assetProxyUtils.encodeERC20AssetData(zrxToken.address);
-                const amount = new BigNumber(10);
-                const numTransfers = 2;
-                const assetData = _.times(numTransfers, () => encodedAssetData);
-                const fromAddresses = _.times(numTransfers, () => makerAddress);
-                const toAddresses = _.times(numTransfers, () => takerAddress);
-                const amounts = _.times(numTransfers, () => amount);
-
-                return expectRevertReasonOrAlwaysFailingTransactionAsync(
-                    erc20Proxy.batchTransferFrom.sendTransactionAsync(assetData, fromAddresses, toAddresses, amounts, {
-                        from: notAuthorized,
-                    }),
-                    RevertReason.SenderNotAuthorized,
-                );
-            });
-        });
-
         it('should have an id of 0xf47261b0', async () => {
             const proxyId = await erc20Proxy.getProxyId.callAsync();
             const expectedProxyId = '0xf47261b0';
@@ -354,7 +298,7 @@ describe('Asset Transfer Proxies', () => {
                 expect(ownerMakerAsset).to.be.bignumber.equal(makerAddress);
                 // Perform a transfer from makerAddress to takerAddress
                 const amount = new BigNumber(1);
-                return expectRevertOrAlwaysFailingTransactionAsync(
+                return expectRevertReasonOrAlwaysFailingTransactionAsync(
                     erc721Proxy.transferFrom.sendTransactionAsync(
                         encodedAssetData,
                         makerAddress,
@@ -362,6 +306,7 @@ describe('Asset Transfer Proxies', () => {
                         amount,
                         { from: exchangeAddress },
                     ),
+                    RevertReason.TransferFailed,
                 );
             });
 
@@ -443,64 +388,6 @@ describe('Asset Transfer Proxies', () => {
             });
         });
 
-        describe('batchTransferFrom ERC721', () => {
-            it('should succesfully make multiple token transfers', async () => {
-                const erc721TokensById = await erc721Wrapper.getBalancesAsync();
-                const [makerTokenIdA, makerTokenIdB] = erc721TokensById[makerAddress][erc721Token.address];
-
-                const numTransfers = 2;
-                const assetData = [
-                    assetProxyUtils.encodeERC721AssetData(erc721Token.address, makerTokenIdA),
-                    assetProxyUtils.encodeERC721AssetData(erc721Token.address, makerTokenIdB),
-                ];
-                const fromAddresses = _.times(numTransfers, () => makerAddress);
-                const toAddresses = _.times(numTransfers, () => takerAddress);
-                const amounts = _.times(numTransfers, () => new BigNumber(1));
-
-                const txHash = await erc721Proxy.batchTransferFrom.sendTransactionAsync(
-                    assetData,
-                    fromAddresses,
-                    toAddresses,
-                    amounts,
-                    { from: exchangeAddress },
-                );
-                const res = await web3Wrapper.awaitTransactionSuccessAsync(
-                    txHash,
-                    constants.AWAIT_TRANSACTION_MINED_MS,
-                );
-                // During an ERC721 transfer enabled by a specific token approval,
-                // the approval is cleared, emitting an event
-                const numApprovals = 2;
-                expect(res.logs.length).to.equal(numTransfers + numApprovals);
-
-                const newOwnerMakerAssetA = await erc721Token.ownerOf.callAsync(makerTokenIdA);
-                const newOwnerMakerAssetB = await erc721Token.ownerOf.callAsync(makerTokenIdB);
-                expect(newOwnerMakerAssetA).to.be.bignumber.equal(takerAddress);
-                expect(newOwnerMakerAssetB).to.be.bignumber.equal(takerAddress);
-            });
-
-            it('should throw if not called by an authorized address', async () => {
-                const erc721TokensById = await erc721Wrapper.getBalancesAsync();
-                const [makerTokenIdA, makerTokenIdB] = erc721TokensById[makerAddress][erc721Token.address];
-
-                const numTransfers = 2;
-                const assetData = [
-                    assetProxyUtils.encodeERC721AssetData(erc721Token.address, makerTokenIdA).slice(0, -2),
-                    assetProxyUtils.encodeERC721AssetData(erc721Token.address, makerTokenIdB).slice(0, -2),
-                ];
-                const fromAddresses = _.times(numTransfers, () => makerAddress);
-                const toAddresses = _.times(numTransfers, () => takerAddress);
-                const amounts = _.times(numTransfers, () => new BigNumber(1));
-
-                return expectRevertReasonOrAlwaysFailingTransactionAsync(
-                    erc721Proxy.batchTransferFrom.sendTransactionAsync(assetData, fromAddresses, toAddresses, amounts, {
-                        from: notAuthorized,
-                    }),
-                    RevertReason.SenderNotAuthorized,
-                );
-            });
-        });
-
         it('should have an id of 0x08e937fa', async () => {
             const proxyId = await erc721Proxy.getProxyId.callAsync();
             const expectedProxyId = '0x08e937fa';