5 files changed, 7 insertions, 6 deletions
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>,