2 files changed, 41 insertions, 0 deletions
diff --git a/mascara/src/lib/setup-iframe.js b/mascara/src/lib/setup-iframe.js
new file mode 100644
index 000000000..db67163df
--- /dev/null
+++ b/mascara/src/lib/setup-iframe.js
@@ -0,0 +1,19 @@
+const Iframe = require('iframe')
+const IframeStream = require('iframe-stream').IframeStream
+
+module.exports = setupIframe
+
+
+function setupIframe(opts) {
+  opts = opts || {}
+  var frame = Iframe({
+    src: opts.zeroClientProvider || 'https://zero.metamask.io/',
+    container: opts.container || document.head,
+    sandboxAttributes: opts.sandboxAttributes || ['allow-scripts', 'allow-popups'],
+  })
+  var iframe = frame.iframe
+  iframe.style.setProperty('display', 'none')
+  var iframeStream = new IframeStream(iframe)
+
+  return iframeStream
+}
diff --git a/mascara/src/lib/setup-provider.js b/mascara/src/lib/setup-provider.js
new file mode 100644
index 000000000..62335b18d
--- /dev/null
+++ b/mascara/src/lib/setup-provider.js
@@ -0,0 +1,22 @@
+const setupIframe = require('./setup-iframe.js')
+const MetamaskInpageProvider = require('../../../app/scripts/lib/inpage-provider.js')
+
+module.exports = getProvider
+
+
+function getProvider(opts){
+  if (global.web3) {
+    console.log('MetaMask ZeroClient - using environmental web3 provider')
+    return global.web3.currentProvider
+  }
+  console.log('MetaMask ZeroClient - injecting zero-client iframe!')
+  var iframeStream = setupIframe({
+    zeroClientProvider: opts.mascaraUrl,
+    sandboxAttributes: ['allow-scripts', 'allow-popups', 'allow-same-origin'],
+    container: document.body,
+  })
+
+  var inpageProvider = new MetamaskInpageProvider(iframeStream)
+  return inpageProvider
+
+}