migration #9 - break out CurrencyController substate

2 files changed, 41 insertions, 0 deletions

diff --git a/app/scripts/migrations/009.js b/app/scripts/migrations/009.js
new file mode 100644
index 000000000..61b8b7fa2
--- /dev/null
+++ b/app/scripts/migrations/009.js
@@ -0,0 +1,40 @@
+const version = 9
+
+/*
+
+This migration breaks out the CurrencyController substate
+
+*/
+
+const merge = require('deep-merge')
+
+module.exports = {
+  version,  
+
+  migrate: function (versionedData) {
+    versionedData.meta.version = version
+    try {
+      const state = versionedData.data
+      const newState = transformState(state)
+      versionedData.data = newState
+    } catch (err) {
+      console.warn(`MetaMask Migration #${version}` + err.stack)
+    }
+    return Promise.resolve(versionedData)
+  },
+}
+
+function transformState (state) {
+  const newState = merge(state, {
+    CurrencyController: {
+      currentCurrency: state.currentFiat || 'USD',
+      conversionRate: state.conversionRate,
+      conversionDate: state.conversionDate,
+    },
+  })
+  delete newState.currentFiat
+  delete newState.conversionRate
+  delete newState.conversionDate
+
+  return newState
+}
diff --git a/app/scripts/migrations/index.js b/app/scripts/migrations/index.js
index a25d3b044..22bf008ba 100644
--- a/app/scripts/migrations/index.js
+++ b/app/scripts/migrations/index.js
@@ -19,4 +19,5 @@ module.exports = [
   require('./006'),
   require('./007'),
   require('./008'),
+  require('./009'),
 ]