Merge branch 'development' into fix/doc_bugs

* development: (21 commits)
  Adjust the tests
  Move tutorials to adhere to current dir structure
  Make tests slightly nicer
  Remove only
  Improve the comments
  Improve the comments
  Add comments to Arbitrage contract
  Don't pass tokenGet and tokenGive because we can get them from 0x order
  Pretty-print ED contracts
  Make external
  Fix a typo
  Change type to uint256
  Make setAllowances external
  Fix the comment
  Put all ED contracts in one folder
  Move tutorials contracts to src folder
  Remove false-positive linter failure because of chai-as-pronmised incorrect types
  Assert that the balances don't change if arbitrage fails
  Initial implementation of Arbitrage contract with tests
  Set max to 2 ETH/2 ZRX
  ...

1 files changed, 7 insertions, 1 deletions

diff --git a/packages/contracts/util/crypto.ts b/packages/contracts/util/crypto.ts
index 9173df643..97b8f5643 100644
--- a/packages/contracts/util/crypto.ts
+++ b/packages/contracts/util/crypto.ts
@@ -13,6 +13,12 @@ export const crypto = {
    * valid Ethereum address -> address
    */
     solSHA3(args: any[]): Buffer {
+        return crypto._solHash(args, ABI.soliditySHA3);
+    },
+    solSHA256(args: any[]): Buffer {
+        return crypto._solHash(args, ABI.soliditySHA256);
+    },
+    _solHash(args: any[], hashFunction: (types: string[], values: any[]) => Buffer) {
         const argTypes: string[] = [];
         _.each(args, (arg, i) => {
             const isNumber = _.isFinite(arg);
@@ -31,7 +37,7 @@ export const crypto = {
                 throw new Error(`Unable to guess arg type: ${arg}`);
             }
         });
-        const hash = ABI.soliditySHA3(argTypes, args);
+        const hash = hashFunction(argTypes, args);
         return hash;
     },
 };