Merge branch 'development' into feature/order-watcher/dockerize

* development: (898 commits)
  Fixed merge conflict from development
  Ran prettier
  Doc generation working for changes by dutch auction wrapper
  added changelog entry for monorepo-scripts
  Hide dutch auction wrapper from docs -- hopefully this will prevent the "must export Web3Wrapper" error from doc generation
  relaxed version on contract-extension dependencies
  Added NetworkID 50 address for dutch auction wrapper
  removed manual updte of package.json version
  export dutch auction wrapper types from 0x.js
  Export dutch auction wrapper in 0x.js
  ran prettier
  Minor documentation updates to dutch auction wrapper
  `afterAuctionDetails` -> `auctionDetails`
  Added @todo for including dutch auction addresses once deployed
  Ran prettier & linter
  Removed redundant assignment
  removed needless newline on contract-wrappers changelog
  removed timestamp from changelog for abi-gen-wrappers
  added dutch auction address for testnets
  removed .only
  ...

1 files changed, 62 insertions, 4 deletions

diff --git a/packages/order-utils/src/constants.ts b/packages/order-utils/src/constants.ts
index 10029dcc3..a9a687719 100644
--- a/packages/order-utils/src/constants.ts
+++ b/packages/order-utils/src/constants.ts
@@ -1,16 +1,71 @@
 import { BigNumber } from '@0x/utils';
+import { MethodAbi } from 'ethereum-types';
+
+const ERC20_METHOD_ABI: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'tokenContract',
+            type: 'address',
+        },
+    ],
+    name: 'ERC20Token',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+const ERC721_METHOD_ABI: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'tokenContract',
+            type: 'address',
+        },
+        {
+            name: 'tokenId',
+            type: 'uint256',
+        },
+    ],
+    name: 'ERC721Token',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+const MULTI_ASSET_METHOD_ABI: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'amounts',
+            type: 'uint256[]',
+        },
+        {
+            name: 'nestedAssetData',
+            type: 'bytes[]',
+        },
+    ],
+    name: 'MultiAsset',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
 
 export const constants = {
     NULL_ADDRESS: '0x0000000000000000000000000000000000000000',
     NULL_BYTES: '0x',
+    NULL_ERC20_ASSET_DATA: '0xf47261b00000000000000000000000000000000000000000000000000000000000000000',
     // tslint:disable-next-line:custom-no-magic-numbers
     UNLIMITED_ALLOWANCE_IN_BASE_UNITS: new BigNumber(2).pow(256).minus(1),
     TESTRPC_NETWORK_ID: 50,
     ADDRESS_LENGTH: 20,
-    ERC20_ASSET_DATA_BYTE_LENGTH: 36,
-    ERC721_ASSET_DATA_MINIMUM_BYTE_LENGTH: 53,
-    SELECTOR_LENGTH: 4,
-    BASE_16: 16,
+    ERC20_ASSET_DATA_MIN_CHAR_LENGTH_WITH_PREFIX: 74,
+    ERC721_ASSET_DATA_MIN_CHAR_LENGTH_WITH_PREFIX: 136,
+    MULTI_ASSET_DATA_MIN_CHAR_LENGTH_WITH_PREFIX: 266,
+    SELECTOR_CHAR_LENGTH_WITH_PREFIX: 10,
     INFINITE_TIMESTAMP_SEC: new BigNumber(2524604400), // Close to infinite
     ZERO_AMOUNT: new BigNumber(0),
     EIP712_DOMAIN_NAME: '0x Protocol',
@@ -48,4 +103,7 @@ export const constants = {
             { name: 'data', type: 'bytes' },
         ],
     },
+    ERC20_METHOD_ABI,
+    ERC721_METHOD_ABI,
+    MULTI_ASSET_METHOD_ABI,
 };