Fix typo and improved code readability

old-ui/app/components/ens-input.js

@@ -86,7 +86,7 @@ EnsInput.prototype.render = function () {
 EnsInput.prototype.componentDidMount = function () {
   const network = this.props.network
   const networkHasEnsSupport = getNetworkEnsSupport(network)
-  const rnsRegistry = getNetworkRnsSupport(network)
+  const networkHasRnsSupport = getNetworkRnsSupport(network)
 
   this.setState({ ensResolution: ZERO_ADDRESS })
 
@@ -94,9 +94,10 @@ EnsInput.prototype.componentDidMount = function () {
     const provider = global.ethereumProvider
     this.ens = new ENS({ provider, network })
     this.checkName = debounce(this.lookupEnsName.bind(this, 'ENS'), 200)
-  } else if (rnsRegistry) {
+  } else if (networkHasRnsSupport) {
+    const registryAddress = getRnsRegistryAddress(network);
     const provider = global.ethereumProvider
-    this.ens = new ENS({ provider, network, registryAddress: rnsRegistry })
+    this.ens = new ENS({ provider, network, registryAddress })
     this.checkName = debounce(this.lookupEnsName.bind(this, 'RNS'), 200)
   }
 }
@@ -132,7 +133,7 @@ EnsInput.prototype.lookupEnsName = function (nameService) {
       && reason.message === 'ENS name not defined.'
     ) {
       setStateObj.hoverText = `${nameService} name not found`
-      setStateObj.toError = `${nameService.toLowerCase}NameNotFound`
+      setStateObj.toError = `${nameService.toLowerCase()}NameNotFound`
       setStateObj.ensFailure = false
     } else {
       log.error(reason)
@@ -214,6 +215,10 @@ function getNetworkEnsSupport (network) {
 }
 
 function getNetworkRnsSupport (network) {
+  return (network == RSK_CODE || network == RSK_TESTNET_CODE);
+}
+
+function getRnsRegistryAddress (network) {
   if (network == RSK_CODE) {
     return RNSRegistryData.address.rskMainnet;
   }

old-ui/app/util.js

@@ -141,7 +141,7 @@ function isValidENSAddress (address) {
 }
 
 function isValidRNSAddress (address) {
-  return address.match(/([a-z0-9])+\.(rsk)/)
+  return address.match(/^[a-z0-9]+\.rsk$/)
 }
 
 function isInvalidChecksumAddress (address, network) {