1 files changed, 27 insertions, 0 deletions
diff --git a/app/scripts/controllers/network/createInfuraClient.js b/app/scripts/controllers/network/createInfuraClient.js
new file mode 100644
index 000000000..326bcb355
--- /dev/null
+++ b/app/scripts/controllers/network/createInfuraClient.js
@@ -0,0 +1,27 @@
+const mergeMiddleware = require('json-rpc-engine/src/mergeMiddleware')
+const createBlockReRefMiddleware = require('eth-json-rpc-middleware/block-ref')
+const createRetryOnEmptyMiddleware = require('eth-json-rpc-middleware/retryOnEmpty')
+const createBlockCacheMiddleware = require('eth-json-rpc-middleware/block-cache')
+const createInflightMiddleware = require('eth-json-rpc-middleware/inflight-cache')
+const createBlockTrackerInspectorMiddleware = require('eth-json-rpc-middleware/block-tracker-inspector')
+const providerFromMiddleware = require('eth-json-rpc-middleware/providerFromMiddleware')
+const createInfuraMiddleware = require('eth-json-rpc-infura')
+const BlockTracker = require('eth-block-tracker')
+
+module.exports = createInfuraClient
+
+function createInfuraClient ({ network }) {
+  const infuraMiddleware = createInfuraMiddleware({ network })
+  const infuraProvider = providerFromMiddleware(infuraMiddleware)
+  const blockTracker = new BlockTracker({ provider: infuraProvider })
+
+  const networkMiddleware = mergeMiddleware([
+    createBlockCacheMiddleware({ blockTracker }),
+    createInflightMiddleware(),
+    createBlockReRefMiddleware({ blockTracker, provider: infuraProvider }),
+    createRetryOnEmptyMiddleware({ blockTracker, provider: infuraProvider }),
+    createBlockTrackerInspectorMiddleware({ blockTracker }),
+    infuraMiddleware,
+  ])
+  return { networkMiddleware, blockTracker }
+}