1 files changed, 6 insertions, 6 deletions
diff --git a/packages/contracts/src/utils/log_decoder.ts b/packages/contracts/src/utils/log_decoder.ts
index 98dd8eab6..89f641078 100644
--- a/packages/contracts/src/utils/log_decoder.ts
+++ b/packages/contracts/src/utils/log_decoder.ts
@@ -8,17 +8,17 @@ import { Artifact } from './types';
 
 export class LogDecoder {
     private _abiDecoder: AbiDecoder;
-    constructor(networkId: number) {
-        if (_.isUndefined(networkId)) {
+    constructor(networkIdIfExists?: number) {
+        if (_.isUndefined(networkIdIfExists)) {
             throw new Error('networkId not specified');
         }
         const abiArrays: Web3.AbiDefinition[][] = [];
         _.forEach(artifacts, (artifact: Artifact) => {
-            const network = artifact.networks[networkId];
-            if (_.isUndefined(network)) {
-                throw new Error(`Artifact does not exist on network ${networkId}`);
+            const networkIfExists = artifact.networks[networkIdIfExists];
+            if (_.isUndefined(networkIfExists)) {
+                throw new Error(`Artifact does not exist on network ${networkIdIfExists}`);
             }
-            abiArrays.push(network.abi);
+            abiArrays.push(networkIfExists.abi);
         });
         this._abiDecoder = new AbiDecoder(abiArrays);
     }