Merge branch 'master' into remainingTokenMethods

# Conflicts:
#	src/types.ts
#	src/web3_wrapper.ts

1 files changed, 3 insertions, 0 deletions

diff --git a/src/utils/assert.ts b/src/utils/assert.ts
index 9a6a132e0..7dffcd98e 100644
--- a/src/utils/assert.ts
+++ b/src/utils/assert.ts
@@ -33,6 +33,9 @@ export const assert = {
     isNumber(variableName: string, value: number): void {
         this.assert(_.isFinite(value), this.typeAssertionMessage(variableName, 'number', value));
     },
+    isBoolean(variableName: string, value: boolean): void {
+        this.assert(_.isBoolean(value), this.typeAssertionMessage(variableName, 'boolean', value));
+    },
     doesConformToSchema(variableName: string, value: object, schema: Schema): void {
         const schemaValidator = new SchemaValidator();
         const validationResult = schemaValidator.validate(value, schema);