Fixes after rebasing

1 files changed, 42 insertions, 36 deletions

diff --git a/packages/order-utils/src/asset_proxy_utils.ts b/packages/order-utils/src/asset_proxy_utils.ts
index a12be83a3..61a9b12e9 100644
--- a/packages/order-utils/src/asset_proxy_utils.ts
+++ b/packages/order-utils/src/asset_proxy_utils.ts
@@ -1,11 +1,11 @@
-import { AssetProxyId, ERC20ProxyData, ERC721ProxyData, ProxyData } from '@0xproject/types';
+import { AssetData, AssetProxyId, ERC20AssetData, ERC721AssetData } from '@0xproject/types';
 import { BigNumber } from '@0xproject/utils';
 import BN = require('bn.js');
 import ethUtil = require('ethereumjs-util');
 import * as _ from 'lodash';
 
-const ERC20_PROXY_METADATA_BYTE_LENGTH = 21;
-const ERC721_PROXY_METADATA_BYTE_LENGTH = 53;
+const ERC20_ASSET_DATA_BYTE_LENGTH = 21;
+const ERC721_ASSET_DATA_BYTE_LENGTH = 53;
 
 export const assetProxyUtils = {
     encodeAssetProxyId(assetProxyId: AssetProxyId): Buffer {
@@ -44,13 +44,13 @@ export const assetProxyUtils = {
     encodeERC20AssetData(tokenAddress: string): string {
         const encodedAssetProxyId = assetProxyUtils.encodeAssetProxyId(AssetProxyId.ERC20);
         const encodedAddress = assetProxyUtils.encodeAddress(tokenAddress);
-        const encodedMetadata = Buffer.concat([encodedAddress, encodedAssetProxyId]);
-        const encodedMetadataHex = ethUtil.bufferToHex(encodedMetadata);
-        return encodedMetadataHex;
+        const encodedAssetData = Buffer.concat([encodedAddress, encodedAssetProxyId]);
+        const encodedAssetDataHex = ethUtil.bufferToHex(encodedAssetData);
+        return encodedAssetDataHex;
     },
-    decodeERC20ProxyData(proxyData: string): ERC20ProxyData {
-        const encodedProxyMetadata = ethUtil.toBuffer(proxyData);
-        if (encodedProxyMetadata.byteLength !== ERC20_PROXY_METADATA_BYTE_LENGTH) {
+    decodeERC20AssetData(proxyData: string): ERC20AssetData {
+        const encodedAssetData = ethUtil.toBuffer(proxyData);
+        if (encodedAssetData.byteLength !== ERC20_ASSET_DATA_BYTE_LENGTH) {
             throw new Error(
                 `Could not decode ERC20 Proxy Data. Expected length of encoded data to be 21. Got ${
                     encodedAssetData.byteLength
@@ -66,8 +66,8 @@ export const assetProxyUtils = {
                 }), but got ${assetProxyId}`,
             );
         }
-        const addressOffset = ERC20_PROXY_METADATA_BYTE_LENGTH - 1;
-        const encodedTokenAddress = encodedProxyMetadata.slice(0, addressOffset);
+        const addressOffset = ERC20_ASSET_DATA_BYTE_LENGTH - 1;
+        const encodedTokenAddress = encodedAssetData.slice(0, addressOffset);
         const tokenAddress = assetProxyUtils.decodeAddress(encodedTokenAddress);
         const erc20AssetData = {
             assetProxyId,
@@ -75,30 +75,36 @@ export const assetProxyUtils = {
         };
         return erc20AssetData;
     },
-    encodeERC721AssetData(tokenAddress: string, tokenId: BigNumber, data?: string): string {
+    encodeERC721AssetData(tokenAddress: string, tokenId: BigNumber, receiverData?: string): string {
         const encodedAssetProxyId = assetProxyUtils.encodeAssetProxyId(AssetProxyId.ERC721);
         const encodedAddress = assetProxyUtils.encodeAddress(tokenAddress);
         const encodedTokenId = assetProxyUtils.encodeUint256(tokenId);
-        let encodedMetadata = Buffer.concat([encodedAddress, encodedTokenId]);
-        if (!_.isUndefined(data)) {
-            const encodedData = ethUtil.toBuffer(data);
-            const dataLength = new BigNumber(encodedData.byteLength);
-            const encodedDataLength = assetProxyUtils.encodeUint256(dataLength);
-            encodedMetadata = Buffer.concat([encodedMetadata, encodedDataLength, encodedData]);
+        let encodedAssetData = Buffer.concat([encodedAddress, encodedTokenId]);
+        if (!_.isUndefined(receiverData)) {
+            const encodedReceiverData = ethUtil.toBuffer(receiverData);
+            const receiverDataLength = new BigNumber(encodedReceiverData.byteLength);
+            const encodedReceiverDataLength = assetProxyUtils.encodeUint256(receiverDataLength);
+            encodedAssetData = Buffer.concat([encodedAssetData, encodedReceiverDataLength, encodedReceiverData]);
         }
-        encodedMetadata = Buffer.concat([encodedMetadata, encodedAssetProxyId]);
-        const encodedMetadataHex = ethUtil.bufferToHex(encodedMetadata);
-        return encodedMetadataHex;
+        encodedAssetData = Buffer.concat([encodedAssetData, encodedAssetProxyId]);
+        const encodedAssetDataHex = ethUtil.bufferToHex(encodedAssetData);
+        return encodedAssetDataHex;
     },
     decodeERC721AssetData(assetData: string): ERC721AssetData {
         const encodedAssetData = ethUtil.toBuffer(assetData);
-        if (encodedAssetData.byteLength < ERC721_PROXY_METADATA_BYTE_LENGTH) {
+        if (encodedAssetData.byteLength < ERC721_ASSET_DATA_BYTE_LENGTH) {
             throw new Error(
                 `Could not decode ERC20 Proxy Data. Expected length of encoded data to be at least 53. Got ${
                     encodedAssetData.byteLength
                 }`,
             );
         }
+        const addressOffset = 0;
+        const tokenIdOffset = 20;
+        const receiverDataLengthOffset = 52;
+        const receiverDataOffset = 84;
+        const encodedTokenAddress = encodedAssetData.slice(addressOffset, tokenIdOffset);
+        const proxyIdOffset = encodedAssetData.byteLength - 1;
         const encodedAssetProxyId = encodedAssetData.slice(-1);
         const assetProxyId = assetProxyUtils.decodeAssetProxyId(encodedAssetProxyId);
         if (assetProxyId !== AssetProxyId.ERC721) {
@@ -108,31 +114,31 @@ export const assetProxyUtils = {
                 }), but got ${assetProxyId}`,
             );
         }
-        const addressOffset = ERC20_PROXY_METADATA_BYTE_LENGTH - 1;
-        const encodedTokenAddress = encodedProxyMetadata.slice(0, addressOffset);
         const tokenAddress = assetProxyUtils.decodeAddress(encodedTokenAddress);
-        const tokenIdOffset = ERC721_PROXY_METADATA_BYTE_LENGTH - 1;
-        const encodedTokenId = encodedProxyMetadata.slice(addressOffset, tokenIdOffset);
+        const encodedTokenId = encodedAssetData.slice(tokenIdOffset, receiverDataLengthOffset);
         const tokenId = assetProxyUtils.decodeUint256(encodedTokenId);
         const nullData = '0x';
-        let data = nullData;
-        if (encodedAssetData.byteLength > 53) {
-            const encodedDataLength = encodedAssetData.slice(52, 84);
-            const dataLength = assetProxyUtils.decodeUint256(encodedDataLength);
-            const expectedDataLength = new BigNumber(encodedAssetData.byteLength - 85);
-            if (!dataLength.equals(expectedDataLength)) {
+        let receiverData = nullData;
+        if (encodedAssetData.byteLength > receiverDataLengthOffset + 1) {
+            const encodedReceiverDataLength = encodedAssetData.slice(receiverDataLengthOffset, receiverDataOffset);
+            const receiverDataLength = assetProxyUtils.decodeUint256(encodedReceiverDataLength);
+            const expectedReceiverDataLength = new BigNumber(encodedAssetData.byteLength - (receiverDataOffset + 1));
+            if (!receiverDataLength.equals(expectedReceiverDataLength)) {
                 throw new Error(
-                    `Data length (${dataLength}) does not match actual length of data (${expectedDataLength})`,
+                    `Data length (${receiverDataLength}) does not match actual length of data (${expectedReceiverDataLength})`,
                 );
             }
-            const encodedData = encodedAssetData.slice(84, expectedDataLength.toNumber() + 84);
-            data = ethUtil.bufferToHex(encodedData);
+            const encodedReceiverData = encodedAssetData.slice(
+                receiverDataOffset,
+                receiverDataOffset + receiverDataLength.toNumber(),
+            );
+            receiverData = ethUtil.bufferToHex(encodedReceiverData);
         }
         const erc721AssetData: ERC721AssetData = {
             assetProxyId,
             tokenAddress,
             tokenId,
-            data,
+            receiverData,
         };
         return erc721AssetData;
     },