Merge branch 'development' into feature/receipt-status

* development: (164 commits)
  Remove old tests
  Remove unused code
  Fix tests
  Remove redundant spaces
  Don't store empty objects
  Fix a typo
  Remove duplicate operations
  Remove redundant instance variables
  Fix tests
  Remove blockStore and default to numConfirmations === 0
  Add a comment
  Store number of confirmations in a blockStore
  Remove tautology check
  Pass blockStore to eventWatcher
  Fix last merge conflicts
  Clear cache on unsubscribe
  Clear store cache on events
  Add more configs for order watcher
  Make subscribe function async and make blockStore operational
  Adjust tests to new interface
  ...

# Conflicts:
#	package.json
#	src/types.ts
#	yarn.lock

1 files changed, 15 insertions, 2 deletions

diff --git a/src/utils/assert.ts b/src/utils/assert.ts
index 286105345..e5c9439f3 100644
--- a/src/utils/assert.ts
+++ b/src/utils/assert.ts
@@ -1,8 +1,10 @@
 import * as _ from 'lodash';
-import BigNumber from 'bignumber.js';
 import * as Web3 from 'web3';
-import {Web3Wrapper} from '../web3_wrapper';
+import BigNumber from 'bignumber.js';
 import {SchemaValidator, Schema} from '0x-json-schemas';
+import {Web3Wrapper} from '../web3_wrapper';
+import {signatureUtils} from '../utils/signature_utils';
+import {ECSignature} from '../types';
 
 const HEX_REGEX = /^0x[0-9A-F]*$/i;
 
@@ -11,6 +13,17 @@ export const assert = {
         const isBigNumber = _.isObject(value) && (value as any).isBigNumber;
         this.assert(isBigNumber, this.typeAssertionMessage(variableName, 'BigNumber', value));
     },
+    isValidBaseUnitAmount(variableName: string, value: BigNumber) {
+        assert.isBigNumber(variableName, value);
+        const hasDecimals = value.decimalPlaces() !== 0;
+        this.assert(
+            !hasDecimals, `${variableName} should be in baseUnits (no decimals), found value: ${value.toNumber()}`,
+        );
+    },
+    isValidSignature(orderHash: string, ecSignature: ECSignature, signerAddress: string) {
+        const isValidSignature = signatureUtils.isValidSignature(orderHash, ecSignature, signerAddress);
+        this.assert(isValidSignature, `Expected order with hash '${orderHash}' to have a valid signature`);
+    },
     isUndefined(value: any, variableName?: string): void {
         this.assert(_.isUndefined(value), this.typeAssertionMessage(variableName, 'undefined', value));
     },