From 3a49a4af4fb9bce9d8299463629eefa9469d16ba Mon Sep 17 00:00:00 2001
From: DinhLN <lenhatdinh@gmail.com>
Date: Thu, 4 Oct 2018 15:15:32 +0700
Subject: [PATCH] Add penalty feature for prevent signer without sign in epoc
 make slow down chain.

Fixed duplicate nonce value for randomize and sign txs

Fixed prevent signers penaltied return in 4 epocs sequent.
---
 core/blockchain.go | 10 +++++-----
 eth/backend.go     |  1 -
 2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/core/blockchain.go b/core/blockchain.go
index efd6c0758e..8b61d18dcd 100644
--- a/core/blockchain.go
+++ b/core/blockchain.go
@@ -690,7 +690,7 @@ func (bc *BlockChain) procFutureBlocks() {
 
 		// Insert one by one as chain insertion needs contiguous ancestry between blocks
 		for i := range blocks {
-			bc.InsertChain(blocks[i : i+1])
+			bc.InsertChain(blocks[i: i+1])
 		}
 	}
 }
@@ -699,9 +699,9 @@ func (bc *BlockChain) procFutureBlocks() {
 type WriteStatus byte
 
 const (
-	NonStatTy WriteStatus = iota
-	CanonStatTy
-	SideStatTy
+	NonStatTy   WriteStatus = iota
+	CanonStatTy 
+	SideStatTy  
 )
 
 // Rollback is designed to remove a chain of links from the database that aren't
@@ -1243,7 +1243,7 @@ func (st *insertStats) report(chain []*types.Block, index int, cache common.Stor
 	if index == len(chain)-1 || elapsed >= statsReportLimit {
 		var (
 			end = chain[index]
-			txs = countTransactions(chain[st.lastIndex : index+1])
+			txs = countTransactions(chain[st.lastIndex: index+1])
 		)
 		context := []interface{}{
 			"blocks", st.processed, "txs", txs, "mgas", float64(st.usedGas) / 1000000,
diff --git a/eth/backend.go b/eth/backend.go
index 6299a7017f..c67ed1bad6 100644
--- a/eth/backend.go
+++ b/eth/backend.go
@@ -282,7 +282,6 @@ func New(ctx *node.ServiceContext, config *Config) (*Ethereum, error) {
 				}
 				return penSigners, nil
 			}
-
 			return []common.Address{}, nil
 		}