From ae2a4d78e8c7733da1963965e38e154351d54a20 Mon Sep 17 00:00:00 2001
From: Dan <danjm.com@gmail.com>
Date: Tue, 5 Dec 2017 17:21:14 -0330
Subject: [PATCH] Exponentional backoff on transaction retry in
 pending-tx-tracker

---
 app/scripts/controllers/transactions.js |  6 ++++++
 app/scripts/lib/pending-tx-tracker.js   | 16 ++++++++++++++--
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/app/scripts/controllers/transactions.js b/app/scripts/controllers/transactions.js
index a861c0342..063ba8f65 100644
--- a/app/scripts/controllers/transactions.js
+++ b/app/scripts/controllers/transactions.js
@@ -72,6 +72,12 @@ module.exports = class TransactionController extends EventEmitter {
     })
     this.pendingTxTracker.on('tx:failed', this.txStateManager.setTxStatusFailed.bind(this.txStateManager))
     this.pendingTxTracker.on('tx:confirmed', this.txStateManager.setTxStatusConfirmed.bind(this.txStateManager))
+    this.pendingTxTracker.on('tx:block-update', (txMeta, latestBlockNumber) => {
+      if (!txMeta.firstRetryBlockNumber) {
+        txMeta.firstRetryBlockNumber = latestBlockNumber
+        this.txStateManager.updateTx(txMeta, 'transactions/pending-tx-tracker#event: tx:retry')
+      }
+    })
     this.pendingTxTracker.on('tx:retry', (txMeta) => {
       if (!('retryCount' in txMeta)) txMeta.retryCount = 0
       txMeta.retryCount++
diff --git a/app/scripts/lib/pending-tx-tracker.js b/app/scripts/lib/pending-tx-tracker.js
index 0d7c6a92c..60c837040 100644
--- a/app/scripts/lib/pending-tx-tracker.js
+++ b/app/scripts/lib/pending-tx-tracker.js
@@ -65,7 +65,7 @@ module.exports = class PendingTransactionTracker extends EventEmitter {
   }
 
 
-  resubmitPendingTxs () {
+  resubmitPendingTxs (block) {
     const pending = this.getPendingTransactions()
     // only try resubmitting if their are transactions to resubmit
     if (!pending.length) return
@@ -101,13 +101,25 @@ module.exports = class PendingTransactionTracker extends EventEmitter {
     }))
   }
 
-  async _resubmitTx (txMeta) {
+  async _resubmitTx (txMeta, latestBlockNumber) {
+    if (!txMeta.firstRetryBlockNumber) {
+      this.emit('tx:block-update', txMeta, latestBlockNumber)
+    }
+
     if (Date.now() > txMeta.time + this.retryTimePeriod) {
       const hours = (this.retryTimePeriod / 3.6e+6).toFixed(1)
       const err = new Error(`Gave up submitting after ${hours} hours.`)
       return this.emit('tx:failed', txMeta.id, err)
     }
 
+    const firstRetryBlockNumber = txMeta.firstRetryBlockNumber
+    const txBlockDistance = Number.parseInt(latestBlockNumber, 16) - Number.parseInt(firstRetryBlockNumber, 16)
+
+    const retryCount = txMeta.retryCount || 0
+
+    // Exponential backoff to limit retries at publishing
+    if (txBlockDistance <= Math.pow(2, retryCount) - 1) return
+
     // Only auto-submit already-signed txs:
     if (!('rawTx' in txMeta)) return