1 files changed, 21 insertions, 0 deletions
diff --git a/app/scripts/controllers/network/createLocalhostClient.js b/app/scripts/controllers/network/createLocalhostClient.js
new file mode 100644
index 000000000..fecc512e8
--- /dev/null
+++ b/app/scripts/controllers/network/createLocalhostClient.js
@@ -0,0 +1,21 @@
+const mergeMiddleware = require('json-rpc-engine/src/mergeMiddleware')
+const createFetchMiddleware = require('eth-json-rpc-middleware/fetch')
+const createBlockRefMiddleware = require('eth-json-rpc-middleware/block-ref')
+const createBlockTrackerInspectorMiddleware = require('eth-json-rpc-middleware/block-tracker-inspector')
+const providerFromMiddleware = require('eth-json-rpc-middleware/providerFromMiddleware')
+const BlockTracker = require('eth-block-tracker')
+
+module.exports = createLocalhostClient
+
+function createLocalhostClient () {
+  const fetchMiddleware = createFetchMiddleware({ rpcUrl: 'http://localhost:8545/' })
+  const blockProvider = providerFromMiddleware(fetchMiddleware)
+  const blockTracker = new BlockTracker({ provider: blockProvider, pollingInterval: 1000 })
+
+  const networkMiddleware = mergeMiddleware([
+    createBlockRefMiddleware({ blockTracker }),
+    createBlockTrackerInspectorMiddleware({ blockTracker }),
+    fetchMiddleware,
+  ])
+  return { networkMiddleware, blockTracker }
+}