1 files changed, 0 insertions, 136 deletions
diff --git a/vendor/github.com/dexon-foundation/dexon-consensus-core/core/leader-selector.go b/vendor/github.com/dexon-foundation/dexon-consensus-core/core/leader-selector.go
deleted file mode 100644
index 2be596abc..000000000
--- a/vendor/github.com/dexon-foundation/dexon-consensus-core/core/leader-selector.go
+++ /dev/null
@@ -1,136 +0,0 @@
-// Copyright 2018 The dexon-consensus Authors
-// This file is part of the dexon-consensus library.
-//
-// The dexon-consensus library is free software: you can redistribute it
-// and/or modify it under the terms of the GNU Lesser General Public License as
-// published by the Free Software Foundation, either version 3 of the License,
-// or (at your option) any later version.
-//
-// The dexon-consensus library is distributed in the hope that it will be
-// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
-// General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the dexon-consensus library. If not, see
-// <http://www.gnu.org/licenses/>.
-
-package core
-
-import (
-	"fmt"
-	"math/big"
-	"sync"
-
-	"github.com/dexon-foundation/dexon-consensus/common"
-	"github.com/dexon-foundation/dexon-consensus/core/crypto"
-	"github.com/dexon-foundation/dexon-consensus/core/types"
-)
-
-// Errors for leader module.
-var (
-	ErrIncorrectCRSSignature = fmt.Errorf("incorrect CRS signature")
-)
-
-type validLeaderFn func(*types.Block) bool
-
-// Some constant value.
-var (
-	maxHash *big.Int
-	one     *big.Rat
-)
-
-func init() {
-	hash := make([]byte, common.HashLength)
-	for i := range hash {
-		hash[i] = 0xff
-	}
-	maxHash = big.NewInt(0).SetBytes(hash)
-	one = big.NewRat(1, 1)
-}
-
-type leaderSelector struct {
-	hashCRS       common.Hash
-	numCRS        *big.Int
-	minCRSBlock   *big.Int
-	minBlockHash  common.Hash
-	pendingBlocks []*types.Block
-	validLeader   validLeaderFn
-	lock          sync.Mutex
-}
-
-func newLeaderSelector(
-	crs common.Hash, validLeader validLeaderFn) *leaderSelector {
-	numCRS := big.NewInt(0)
-	numCRS.SetBytes(crs[:])
-	return &leaderSelector{
-		numCRS:      numCRS,
-		hashCRS:     crs,
-		minCRSBlock: maxHash,
-		validLeader: validLeader,
-	}
-}
-
-func (l *leaderSelector) distance(sig crypto.Signature) *big.Int {
-	hash := crypto.Keccak256Hash(sig.Signature[:])
-	num := big.NewInt(0)
-	num.SetBytes(hash[:])
-	num.Abs(num.Sub(l.numCRS, num))
-	return num
-}
-
-func (l *leaderSelector) probability(sig crypto.Signature) float64 {
-	dis := l.distance(sig)
-	prob := big.NewRat(1, 1).SetFrac(dis, maxHash)
-	p, _ := prob.Sub(one, prob).Float64()
-	return p
-}
-
-func (l *leaderSelector) restart() {
-	l.lock.Lock()
-	defer l.lock.Unlock()
-	l.minCRSBlock = maxHash
-	l.minBlockHash = common.Hash{}
-	l.pendingBlocks = []*types.Block{}
-}
-
-func (l *leaderSelector) leaderBlockHash() common.Hash {
-	l.lock.Lock()
-	defer l.lock.Unlock()
-	newPendingBlocks := []*types.Block{}
-	for _, b := range l.pendingBlocks {
-		if l.validLeader(b) {
-			l.updateLeader(b)
-		} else {
-			newPendingBlocks = append(newPendingBlocks, b)
-		}
-	}
-	l.pendingBlocks = newPendingBlocks
-	return l.minBlockHash
-}
-
-func (l *leaderSelector) processBlock(block *types.Block) error {
-	ok, err := verifyCRSSignature(block, l.hashCRS)
-	if err != nil {
-		return err
-	}
-	if !ok {
-		return ErrIncorrectCRSSignature
-	}
-	l.lock.Lock()
-	defer l.lock.Unlock()
-	if !l.validLeader(block) {
-		l.pendingBlocks = append(l.pendingBlocks, block)
-		return nil
-	}
-	l.updateLeader(block)
-	return nil
-}
-func (l *leaderSelector) updateLeader(block *types.Block) {
-	dist := l.distance(block.CRSSignature)
-	cmp := l.minCRSBlock.Cmp(dist)
-	if cmp > 0 || (cmp == 0 && block.Hash.Less(l.minBlockHash)) {
-		l.minCRSBlock = dist
-		l.minBlockHash = block.Hash
-	}
-}