7 files changed, 16 insertions, 7 deletions
diff --git a/packages/utils/CHANGELOG.json b/packages/utils/CHANGELOG.json
index 616a17d62..339d73e05 100644
--- a/packages/utils/CHANGELOG.json
+++ b/packages/utils/CHANGELOG.json
@@ -1,5 +1,13 @@
 [
     {
+        "version": "0.6.3",
+        "changes": [
+            {
+                "note": "Added errorUtils.spawnSwitchErr"
+            }
+        ]
+    },
+    {
         "timestamp": 1527009133,
         "version": "0.6.2",
         "changes": [
diff --git a/packages/utils/package.json b/packages/utils/package.json
index 89daadbec..3828fa9ee 100644
--- a/packages/utils/package.json
+++ b/packages/utils/package.json
@@ -8,7 +8,7 @@
     "main": "lib/index.js",
     "types": "lib/index.d.ts",
     "scripts": {
-        "watch": "tsc -w",
+        "watch_without_deps": "tsc -w",
         "build": "tsc && copyfiles -u 2 './lib/monorepo_scripts/**/*' ./scripts",
         "clean": "shx rm -rf lib scripts",
         "lint": "tslint --project .",
diff --git a/packages/utils/src/abi_decoder.ts b/packages/utils/src/abi_decoder.ts
index ed3297ee1..931cb94b2 100644
--- a/packages/utils/src/abi_decoder.ts
+++ b/packages/utils/src/abi_decoder.ts
@@ -29,12 +29,9 @@ export class AbiDecoder {
             return log;
         }
         const ethersInterface = new ethers.Interface([event]);
-        const logData = log.data;
         const decodedParams: DecodedLogArgs = {};
         let topicsIndex = 1;
 
-        const nonIndexedInputs = _.filter(event.inputs, input => !input.indexed);
-        const dataTypes = _.map(nonIndexedInputs, input => input.type);
         const decodedData = ethersInterface.events[event.name].parse(log.data);
 
         let didFailToDecode = false;
diff --git a/packages/utils/src/abi_utils.ts b/packages/utils/src/abi_utils.ts
index b5822425c..413c2f481 100644
--- a/packages/utils/src/abi_utils.ts
+++ b/packages/utils/src/abi_utils.ts
@@ -1,4 +1,4 @@
-import { AbiDefinition, AbiType, ConstructorAbi, ContractAbi, DataItem, MethodAbi } from 'ethereum-types';
+import { AbiDefinition, AbiType, ContractAbi, DataItem, MethodAbi } from 'ethereum-types';
 import * as _ from 'lodash';
 
 export const abiUtils = {
diff --git a/packages/utils/src/error_utils.ts b/packages/utils/src/error_utils.ts
new file mode 100644
index 000000000..735d3940b
--- /dev/null
+++ b/packages/utils/src/error_utils.ts
@@ -0,0 +1,5 @@
+export const errorUtils = {
+    spawnSwitchErr(name: string, value: any): Error {
+        return new Error(`Unexpected switch value: ${value} encountered for ${name}`);
+    },
+};
diff --git a/packages/utils/src/index.ts b/packages/utils/src/index.ts
index 709ec93b2..fd102cecb 100644
--- a/packages/utils/src/index.ts
+++ b/packages/utils/src/index.ts
@@ -7,3 +7,4 @@ export { AbiDecoder } from './abi_decoder';
 export { logUtils } from './log_utils';
 export { abiUtils } from './abi_utils';
 export { NULL_BYTES } from './constants';
+export { errorUtils } from './error_utils';
diff --git a/packages/utils/src/interval_utils.ts b/packages/utils/src/interval_utils.ts
index 6784d5b35..3d0561cd2 100644
--- a/packages/utils/src/interval_utils.ts
+++ b/packages/utils/src/interval_utils.ts
@@ -1,5 +1,3 @@
-import * as _ from 'lodash';
-
 export const intervalUtils = {
     setAsyncExcludingInterval(
         fn: () => Promise<void>,