Merge branch 'v2-prototype' into feature/website/wallet-flex-box

* v2-prototype: (95 commits)
  Add missing dep to website
  Upgrade solidity parser
  Fix trace test
  Fix linter issues
  Move contract utils
  Fix prettier
  Fix NameResolver
  Fix prettier
  Remove 0x.js as a dependency from website
  Enable 0x.js tests
  Fix small bug in order-utils
  Address feedback
  Fix Tslint error caused by "PromiseLike" value
  Fix Tslint error caused by "PromiseLike" value
  Update dogfood url
  fix contract-wrappers version
  Parse compiler.json in SolCompilerArtifactsAdapter
  Fix TokenTransferProxy artifact name since it's now suffixed with _v1
  Update yarn.lock
  Fix signature verification test
  ...

1 files changed, 6 insertions, 13 deletions

diff --git a/packages/utils/src/abi_decoder.ts b/packages/utils/src/abi_decoder.ts
index d329f917a..d2d8364ca 100644
--- a/packages/utils/src/abi_decoder.ts
+++ b/packages/utils/src/abi_decoder.ts
@@ -12,20 +12,12 @@ import {
 import * as ethers from 'ethers';
 import * as _ from 'lodash';
 
+import { addressUtils } from './address_utils';
 import { BigNumber } from './configured_bignumber';
 
 export class AbiDecoder {
     private _savedABIs: AbiDefinition[] = [];
     private _methodIds: { [signatureHash: string]: EventAbi } = {};
-    private static _padZeros(address: string): string {
-        let formatted = address;
-        if (_.startsWith(formatted, '0x')) {
-            formatted = formatted.slice(2);
-        }
-
-        formatted = _.padStart(formatted, 40, '0');
-        return `0x${formatted}`;
-    }
     constructor(abiArrays: AbiDefinition[][]) {
         _.forEach(abiArrays, this.addABI.bind(this));
     }
@@ -45,16 +37,17 @@ export class AbiDecoder {
         const dataTypes = _.map(nonIndexedInputs, input => input.type);
         const decodedData = ethersInterface.events[event.name].parse(log.data);
 
-        let failedToDecode = false;
+        let didFailToDecode = false;
         _.forEach(event.inputs, (param: EventParameter, i: number) => {
             // Indexed parameters are stored in topics. Non-indexed ones in decodedData
             let value: BigNumber | string | number = param.indexed ? log.topics[topicsIndex++] : decodedData[i];
             if (_.isUndefined(value)) {
-                failedToDecode = true;
+                didFailToDecode = true;
                 return;
             }
             if (param.type === SolidityTypes.Address) {
-                value = AbiDecoder._padZeros(new BigNumber(value).toString(16));
+                const baseHex = 16;
+                value = addressUtils.padZeros(new BigNumber(value).toString(baseHex));
             } else if (param.type === SolidityTypes.Uint256 || param.type === SolidityTypes.Uint) {
                 value = new BigNumber(value);
             } else if (param.type === SolidityTypes.Uint8) {
@@ -63,7 +56,7 @@ export class AbiDecoder {
             decodedParams[param.name] = value;
         });
 
-        if (failedToDecode) {
+        if (didFailToDecode) {
             return log;
         } else {
             return {