Support other network links

ui/app/components/token-cell.js

@@ -2,6 +2,7 @@ const Component = require('react').Component
 const h = require('react-hyperscript')
 const inherits = require('util').inherits
 const Identicon = require('./identicon')
+const prefixForNetwork = require('../../lib/etherscan-prefix-for-network')
 
 module.exports = TokenCell
 
@@ -41,6 +42,7 @@ function navigateTo (url) {
 }
 
 function urlFor (tokenAddress, address, network) {
-  return `https://etherscan.io/token/${tokenAddress}?a=${address}`
+  const prefix = prefixForNetwork(network)
+  return `https://${prefix}etherscan.io/token/${tokenAddress}?a=${address}`
 }
 

ui/lib/etherscan-prefix-for-network.js

@@ -0,0 +1,21 @@
+module.exports = function (network) {
+  const net = parseInt(network)
+  let prefix
+  switch (net) {
+    case 1: // main net
+      prefix = ''
+      break
+    case 3: // ropsten test net
+      prefix = 'ropsten.'
+      break
+    case 4: // rinkeby test net
+      prefix = 'rinkeby.'
+      break
+    case 42: // kovan test net
+      prefix = 'kovan.'
+      break
+    default:
+      prefix = ''
+  }
+  return prefix
+}

ui/lib/explorer-link.js

@@ -1,21 +1,6 @@
+const prefixForNetwork = require('./etherscan-prefix-for-network')
+
 module.exports = function (hash, network) {
-  const net = parseInt(network)
-  let prefix
-  switch (net) {
-    case 1: // main net
-      prefix = ''
-      break
-    case 3: // ropsten test net
-      prefix = 'ropsten.'
-      break
-    case 4: // rinkeby test net
-      prefix = 'rinkeby.'
-      break
-    case 42: // kovan test net
-      prefix = 'kovan.'
-      break
-    default:
-      prefix = ''
-  }
+  const prefix = prefixForNetwork(network)
   return `http://${prefix}etherscan.io/tx/${hash}`
 }