Merge branch 'development' into createWethPage

* development: (54 commits)
  Fix redundant spaces
  Fix tests
  Fix website unused vars
  Fix connect unused vars
  Fix 0x.js unused vars
  Dissallow unused vars/imports
  Implement first custom linter rule async-suffix
  Reuse intervalutils in website
  Add a newline
  Name a variable
  Add a comment
  Fix a conditional
  Make migrations deterministic
  Fix linter error
  Fix linter errors
  Add a function to init token balances
  Rename tokenUtils.getNonProtocolTokens to tokenUtils.getDummyTokens
  Add DummyToken to gitignore
  Add DummyToken to artifacts list
  Increase mocha timeout
  ...

4 files changed, 52 insertions, 0 deletions

diff --git a/packages/utils/src/bignumber_config.ts b/packages/utils/src/bignumber_config.ts
new file mode 100644
index 000000000..2d5214e6f
--- /dev/null
+++ b/packages/utils/src/bignumber_config.ts
@@ -0,0 +1,11 @@
+import BigNumber from 'bignumber.js';
+
+export const bigNumberConfigs = {
+    configure() {
+        // By default BigNumber's `toString` method converts to exponential notation if the value has
+        // more then 20 digits. We want to avoid this behavior, so we set EXPONENTIAL_AT to a high number
+        BigNumber.config({
+            EXPONENTIAL_AT: 1000,
+        });
+    },
+};
diff --git a/packages/utils/src/class_utils.ts b/packages/utils/src/class_utils.ts
new file mode 100644
index 000000000..04e60ee57
--- /dev/null
+++ b/packages/utils/src/class_utils.ts
@@ -0,0 +1,18 @@
+import * as _ from 'lodash';
+
+export const classUtils = {
+    // This is useful for classes that have nested methods. Nested methods don't get bound out of the box.
+    bindAll(self: any, exclude: string[] = ['contructor'], thisArg?: any): void {
+        for (const key of Object.getOwnPropertyNames(self)) {
+            const val = self[key];
+            if (!_.includes(exclude, key)) {
+                if (_.isFunction(val)) {
+                    self[key] = val.bind(thisArg || self);
+                } else if (_.isObject(val)) {
+                    classUtils.bindAll(val, exclude, self);
+                }
+            }
+        }
+        return self;
+    },
+};
diff --git a/packages/utils/src/index.ts b/packages/utils/src/index.ts
index edfd192b2..403bc7236 100644
--- a/packages/utils/src/index.ts
+++ b/packages/utils/src/index.ts
@@ -1,2 +1,5 @@
 export {promisify} from './promisify';
 export {addressUtils} from './address_utils';
+export {classUtils} from './class_utils';
+export {intervalUtils} from './interval_utils';
+export {bigNumberConfigs} from './bignumber_config';
diff --git a/packages/utils/src/interval_utils.ts b/packages/utils/src/interval_utils.ts
new file mode 100644
index 000000000..62b79f2f5
--- /dev/null
+++ b/packages/utils/src/interval_utils.ts
@@ -0,0 +1,20 @@
+import * as _ from 'lodash';
+
+export const intervalUtils = {
+    setAsyncExcludingInterval(fn: () => Promise<void>, intervalMs: number) {
+        let locked = false;
+        const intervalId = setInterval(async () => {
+            if (locked) {
+                return;
+            } else {
+                locked = true;
+                await fn();
+                locked = false;
+            }
+        }, intervalMs);
+        return intervalId;
+    },
+    clearAsyncExcludingInterval(intervalId: NodeJS.Timer): void {
+        clearInterval(intervalId);
+    },
+};