From 35d55fc2bf9e8892a1174fc38b0dbba4af719044 Mon Sep 17 00:00:00 2001
From: Determinant <tederminant@gmail.com>
Date: Wed, 25 Sep 2019 18:42:09 -0400
Subject: allow disabling uncles

---
 miner/miner.go  |  1 +
 miner/worker.go | 11 +++++++++++
 2 files changed, 12 insertions(+)

diff --git a/miner/miner.go b/miner/miner.go
index 1f1baa8..60a5d39 100644
--- a/miner/miner.go
+++ b/miner/miner.go
@@ -50,6 +50,7 @@ type Config struct {
 	Noverify     bool           // Disable remote mining solution verification(only useful in ethash).
 	ManualMining bool
 	ManualUncle  bool
+	DisableUncle bool
 }
 
 type Miner struct {
diff --git a/miner/worker.go b/miner/worker.go
index 1aeb9bd..8dd2aff 100644
--- a/miner/worker.go
+++ b/miner/worker.go
@@ -184,6 +184,7 @@ type worker struct {
 	resubmitHook   func(time.Duration, time.Duration) // Method to call upon updating resubmitting interval.
 	manualMining   bool
 	manualUncle    bool
+	disableUncle   bool
 	minerCallbacks *MinerCallbacks
 }
 
@@ -212,8 +213,12 @@ func newWorker(config *Config, chainConfig *params.ChainConfig, engine consensus
 		resubmitAdjustCh:   make(chan *intervalAdjust, resubmitAdjustChanSize),
 		manualMining:       config.ManualMining,
 		manualUncle:        config.ManualUncle,
+		disableUncle:       config.DisableUncle,
 		minerCallbacks:     mcb,
 	}
+	if worker.disableUncle {
+		worker.manualUncle = true
+	}
 	// Subscribe NewTxsEvent for tx pool
 	worker.txsSub = eth.TxPool().SubscribeNewTxsEvent(worker.txsCh)
 	// Subscribe events for blockchain
@@ -689,6 +694,9 @@ func (w *worker) makeCurrent(parent *types.Block, header *types.Header) error {
 
 // commitUncle adds the given block to uncle block set, returns error if failed to add.
 func (w *worker) commitUncle(env *environment, uncle *types.Header) error {
+	if w.disableUncle {
+		return nil
+	}
 	hash := uncle.Hash()
 	if env.uncles.Contains(hash) {
 		return errors.New("uncle not unique")
@@ -937,6 +945,9 @@ func (w *worker) commitNewWork(interrupt *int32, noempty bool, timestamp int64)
 				delete(blocks, hash)
 			}
 		}
+		if w.disableUncle {
+			return
+		}
 		for hash, uncle := range blocks {
 			if len(uncles) == 2 {
 				break
-- 
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