Merge pull request #2688 from ethereum/web3Provides

Web3 Provider modal for local devmode

src/app/tabs/runTab/settings.js

@@ -193,15 +193,23 @@ class SettingsUI {
   }
 
   web3ProviderDialogBody () {
+    const thePath = '<path/to/local/folder/for/test/chain>'
+
     return yo`
       <div class="">
-        <span>Note: If you are using </span>
-        <a href="https://geth.ethereum.org/docs/rpc/server" target="blank">Geth</a>
-        <span>, please configure it to allow requests from Remix:</span>
+        Note: To use Geth & https://remix.ethereum.org, configure it to allow requests from Remix:(see <a href="https://geth.ethereum.org/docs/rpc/server" target="_blank">Geth Docs on rpc server</a>)
+        <div class="border p-1">geth --rpc --rpccorsdomain https://remix.ethereum.org</div>
+        <br>
+        To run Remix & a local Geth test node, use this command: (see <a href="https://geth.ethereum.org/getting-started/dev-mode" target="_blank">Geth Docs on Dev mode</a>)
+        <div class="border p-1">geth --rpc --rpccorsdomain="${window.origin}" --rpcapi web3,eth,debug,personal,net --vmdebug --datadir ${thePath} --dev console</div>
+        <br>
+        <br> 
+        <b>WARNING:</b> It is not safe to use the --rpccorsdomain flag with a wildcard: <b>--rpccorsdomain *</b>
+        <br>
+        <br>For more info: <a href="https://remix-ide.readthedocs.io/en/latest/run.html#more-about-web3-provider" target="_blank">Remix Docs on Web3 Provider</a>
         <br>
-        <b>geth --rpc --rpccorsdomain https://remix.ethereum.org</b>
-        <br><br>
-        <span>Web3 Provider Endpoint</span>
+        <br> 
+        Web3 Provider Endpoint
       </div>
     `
   }