1 files changed, 21 insertions, 0 deletions
diff --git a/ui/lib/etherscan-prefix-for-network.js b/ui/lib/etherscan-prefix-for-network.js
new file mode 100644
index 000000000..2c1904f1c
--- /dev/null
+++ b/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
+}