Auto fail transactions that have been approved for over 12 hours (#5765)

* Auto fail transactions that have been approved for over 12 hours

Converts txs using a migration.

This migration uses a new helper function that generates tx-failing
migrations, and only requires a version, error message, and condition to
run on each transaction.

* Linted

* Only migrate approved txs to failed

* Cleanup

* Cleanup

* Small lint fixes

3 files changed, 69 insertions, 0 deletions

diff --git a/app/scripts/migrations/029.js b/app/scripts/migrations/029.js
new file mode 100644
index 000000000..e17479ccc
--- /dev/null
+++ b/app/scripts/migrations/029.js
@@ -0,0 +1,27 @@
+// next version number
+const version = 29
+const failTxsThat = require('./fail-tx')
+
+// time
+const seconds = 1000
+const minutes = 60 * seconds
+const hours = 60 * minutes
+const unacceptableDelay = 12 * hours
+
+/*
+
+normalizes txParams on unconfirmed txs
+
+*/
+
+module.exports = {
+  version,
+
+  migrate: failTxsThat(version, 'Stuck in approved state for too long.', (txMeta) => {
+    const isApproved = txMeta.status === 'approved'
+    const createdTime = txMeta.submittedTime
+    const now = Date.now()
+    return isApproved && now - createdTime > unacceptableDelay
+  }),
+}
+
diff --git a/app/scripts/migrations/fail-tx.js b/app/scripts/migrations/fail-tx.js
new file mode 100644
index 000000000..98e3ffddb
--- /dev/null
+++ b/app/scripts/migrations/fail-tx.js
@@ -0,0 +1,41 @@
+const clone = require('clone')
+
+module.exports = function (version, reason, condition) {
+  return function (originalVersionedData) {
+    const versionedData = clone(originalVersionedData)
+    versionedData.meta.version = version
+    try {
+      const state = versionedData.data
+      const newState = transformState(state, condition, reason)
+      versionedData.data = newState
+    } catch (err) {
+      console.warn(`MetaMask Migration #${version}` + err.stack)
+    }
+    return Promise.resolve(versionedData)
+
+  }
+}
+
+function transformState (state, condition, reason) {
+  const newState = state
+  const { TransactionController } = newState
+  if (TransactionController && TransactionController.transactions) {
+    const transactions = TransactionController.transactions
+
+    newState.TransactionController.transactions = transactions.map((txMeta) => {
+      if (!condition(txMeta)) {
+        return txMeta
+      }
+
+      txMeta.status = 'failed'
+      txMeta.err = {
+        message: reason,
+        note: `Tx automatically failed by migration because ${reason}`,
+      }
+
+      return txMeta
+    })
+  }
+  return newState
+}
+
diff --git a/app/scripts/migrations/index.js b/app/scripts/migrations/index.js
index 3b512715e..9344b77ed 100644
--- a/app/scripts/migrations/index.js
+++ b/app/scripts/migrations/index.js
@@ -39,4 +39,5 @@ module.exports = [
   require('./026'),
   require('./027'),
   require('./028'),
+  require('./029'),
 ]