From 35f271b264b8e4a0449eff325fb75a78299cf9a6 Mon Sep 17 00:00:00 2001
From: Jeffrey Wilcke <geffobscura@gmail.com>
Date: Mon, 3 Aug 2015 21:57:09 +0200
Subject: miner, core: sort txs by price, nonce

---
 core/types/transaction.go | 19 +++++++++++++++++++
 miner/worker.go           | 35 ++++++++++++++++++++++++++++++++++-
 2 files changed, 53 insertions(+), 1 deletion(-)

diff --git a/core/types/transaction.go b/core/types/transaction.go
index 85b4c6119..28a7e02b3 100644
--- a/core/types/transaction.go
+++ b/core/types/transaction.go
@@ -289,3 +289,22 @@ type TxByNonce struct{ Transactions }
 func (s TxByNonce) Less(i, j int) bool {
 	return s.Transactions[i].data.AccountNonce < s.Transactions[j].data.AccountNonce
 }
+
+type TxByPrice struct{ Transactions }
+
+func (s TxByPrice) Less(i, j int) bool {
+	return s.Transactions[i].data.Price.Cmp(s.Transactions[j].data.Price) > 0
+}
+
+type TxByPriceAndNonce struct{ Transactions }
+
+func (s TxByPriceAndNonce) Less(i, j int) bool {
+	// we can ignore the error here. Sorting shouldn't care about validness
+	ifrom, _ := s.Transactions[i].From()
+	jfrom, _ := s.Transactions[j].From()
+	// favour nonce if they are from the same recipient
+	if ifrom == jfrom {
+		return s.Transactions[i].data.AccountNonce < s.Transactions[j].data.AccountNonce
+	}
+	return s.Transactions[i].data.Price.Cmp(s.Transactions[j].data.Price) > 0
+}
diff --git a/miner/worker.go b/miner/worker.go
index 269219ba0..535ce5144 100644
--- a/miner/worker.go
+++ b/miner/worker.go
@@ -457,9 +457,42 @@ func (self *worker) commitNewWork() {
 	self.makeCurrent(parent, header)
 	work := self.current
 
-	// commit transactions for this run.
+	/* //approach 1
 	transactions := self.eth.TxPool().GetTransactions()
 	sort.Sort(types.TxByNonce{transactions})
+	*/
+
+	//approach 2
+	transactions := self.eth.TxPool().GetTransactions()
+	sort.Sort(types.TxByPriceAndNonce{transactions})
+
+	/* // approach 3
+	// commit transactions for this run.
+	txPerOwner := make(map[common.Address]types.Transactions)
+	// Sort transactions by owner
+	for _, tx := range self.eth.TxPool().GetTransactions() {
+		from, _ := tx.From() // we can ignore the sender error
+		txPerOwner[from] = append(txPerOwner[from], tx)
+	}
+	var (
+		singleTxOwner types.Transactions
+		multiTxOwner  types.Transactions
+	)
+	// Categorise transactions by
+	// 1. 1 owner tx per block
+	// 2. multi txs owner per block
+	for _, txs := range txPerOwner {
+		if len(txs) == 1 {
+			singleTxOwner = append(singleTxOwner, txs[0])
+		} else {
+			multiTxOwner = append(multiTxOwner, txs...)
+		}
+	}
+	sort.Sort(types.TxByPrice{singleTxOwner})
+	sort.Sort(types.TxByNonce{multiTxOwner})
+	transactions := append(singleTxOwner, multiTxOwner...)
+	*/
+
 	work.coinbase.SetGasLimit(header.GasLimit)
 	work.commitTransactions(transactions, self.gasPrice, self.proc)
 	self.eth.TxPool().RemoveTransactions(work.lowGasTxs)
-- 
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