network - infura - hardcode net_version and eth_chainId (#5670)

* network - infura - hardcode net_version and eth_chainId
* network - infura - add rinkeby handling
* lint fix

app/scripts/controllers/network/createInfuraClient.js

@@ -1,4 +1,5 @@
 const mergeMiddleware = require('json-rpc-engine/src/mergeMiddleware')
+const createScaffoldMiddleware = require('json-rpc-engine/src/createScaffoldMiddleware')
 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')
@@ -16,6 +17,7 @@ function createInfuraClient ({ network }) {
   const blockTracker = new BlockTracker({ provider: infuraProvider })
 
   const networkMiddleware = mergeMiddleware([
+    createNetworkAndChainIdMiddleware({ network }),
     createBlockCacheMiddleware({ blockTracker }),
     createInflightMiddleware(),
     createBlockReRefMiddleware({ blockTracker, provider: infuraProvider }),
@@ -25,3 +27,34 @@ function createInfuraClient ({ network }) {
   ])
   return { networkMiddleware, blockTracker }
 }
+
+function createNetworkAndChainIdMiddleware({ network }) {
+  let chainId
+  let netId
+
+  switch (network) {
+    case 'mainnet':
+      netId = '1'
+      chainId = '0x01'
+      break
+    case 'ropsten':
+      netId = '3'
+      chainId = '0x03'
+      break
+    case 'rinkeby':
+      netId = '4'
+      chainId = '0x04'
+      break
+    case 'kovan':
+      netId = '42'
+      chainId = '0x2a'
+      break
+    default:
+      throw new Error(`createInfuraClient - unknown network "${network}"`)
+  }
+
+  return createScaffoldMiddleware({
+    eth_chainId: chainId,
+    net_version: netId,
+  })
+}