From 1b475ba6fe29fb7b403107b26b44f45dea4c4363 Mon Sep 17 00:00:00 2001
From: whyrusleeping <why@ipfs.io>
Date: Wed, 4 Dec 2019 17:18:30 -0800
Subject: [PATCH] some fixes from staticcheck in ./chain

---
 chain/sync.go            | 70 +---------------------------------------
 chain/sync_manager.go    | 25 +++++++-------
 storage/sector_states.go |  1 -
 3 files changed, 12 insertions(+), 84 deletions(-)

diff --git a/chain/sync.go b/chain/sync.go
index 06b0c71f0..9d9e799f1 100644
--- a/chain/sync.go
+++ b/chain/sync.go
@@ -6,7 +6,6 @@ import (
 	"crypto/sha256"
 	"errors"
 	"fmt"
-	"sync"
 	"time"
 
 	"github.com/Gurpartap/async"
@@ -61,8 +60,6 @@ type Syncer struct {
 
 	self peer.ID
 
-	syncLock sync.Mutex
-
 	syncmgr *SyncManager
 
 	incoming *pubsub.PubSub
@@ -242,14 +239,6 @@ func (syncer *Syncer) InformNewBlock(from peer.ID, blk *types.FullBlock) {
 	syncer.InformNewHead(from, fts)
 }
 
-func reverse(tips []*types.TipSet) []*types.TipSet {
-	out := make([]*types.TipSet, len(tips))
-	for i := 0; i < len(tips); i++ {
-		out[i] = tips[len(tips)-(i+1)]
-	}
-	return out
-}
-
 func copyBlockstore(from, to bstore.Blockstore) error {
 	cids, err := from.AllKeysChan(context.TODO())
 	if err != nil {
@@ -340,59 +329,6 @@ func computeMsgMeta(bs amt.Blocks, bmsgCids, smsgCids []cbg.CBORMarshaler) (cid.
 	return mrcid, nil
 }
 
-func (syncer *Syncer) selectHead(ctx context.Context, heads map[peer.ID]*types.TipSet) (*types.TipSet, error) {
-	var headsArr []*types.TipSet
-	for _, ts := range heads {
-		headsArr = append(headsArr, ts)
-	}
-
-	sel := headsArr[0]
-	for i := 1; i < len(headsArr); i++ {
-		cur := headsArr[i]
-
-		yes, err := syncer.store.IsAncestorOf(cur, sel)
-		if err != nil {
-			return nil, err
-		}
-		if yes {
-			continue
-		}
-
-		yes, err = syncer.store.IsAncestorOf(sel, cur)
-		if err != nil {
-			return nil, err
-		}
-		if yes {
-			sel = cur
-			continue
-		}
-
-		nca, err := syncer.store.NearestCommonAncestor(cur, sel)
-		if err != nil {
-			return nil, err
-		}
-
-		if sel.Height()-nca.Height() > build.ForkLengthThreshold {
-			// TODO: handle this better than refusing to sync
-			return nil, fmt.Errorf("Conflict exists in heads set")
-		}
-
-		curw, err := syncer.store.Weight(ctx, cur)
-		if err != nil {
-			return nil, err
-		}
-		selw, err := syncer.store.Weight(ctx, sel)
-		if err != nil {
-			return nil, err
-		}
-
-		if curw.GreaterThan(selw) {
-			sel = cur
-		}
-	}
-	return sel, nil
-}
-
 func (syncer *Syncer) FetchTipSet(ctx context.Context, p peer.ID, cids []cid.Cid) (*store.FullTipSet, error) {
 	if fts, err := syncer.tryLoadFullTipSet(cids); err == nil {
 		return fts, nil
@@ -521,10 +457,6 @@ func (syncer *Syncer) minerIsValid(ctx context.Context, maddr address.Address, b
 	return nil
 }
 
-func (syncer *Syncer) validateTicket(ctx context.Context, maddr, mworker address.Address, ticket *types.Ticket, base *types.TipSet) error {
-	return gen.VerifyVRF(ctx, mworker, maddr, gen.DSepTicket, base.MinTicket().VRFProof, ticket.VRFProof)
-}
-
 var ErrTemporal = errors.New("temporal error")
 
 // Should match up with 'Semantical Validation' in validation.md in the spec
@@ -829,7 +761,7 @@ func (syncer *Syncer) checkBlockMessages(ctx context.Context, b *types.FullBlock
 }
 
 func (syncer *Syncer) verifyBlsAggregate(ctx context.Context, sig types.Signature, msgs []cid.Cid, pubks []bls.PublicKey) error {
-	ctx, span := trace.StartSpan(ctx, "syncer.verifyBlsAggregate")
+	_, span := trace.StartSpan(ctx, "syncer.verifyBlsAggregate")
 	defer span.End()
 	span.AddAttributes(
 		trace.Int64Attribute("msgCount", int64(len(msgs))),
diff --git a/chain/sync_manager.go b/chain/sync_manager.go
index 104ca674c..8a81e4781 100644
--- a/chain/sync_manager.go
+++ b/chain/sync_manager.go
@@ -6,7 +6,7 @@ import (
 	"sync"
 
 	"github.com/filecoin-project/lotus/chain/types"
-	peer "github.com/libp2p/go-libp2p-peer"
+	peer "github.com/libp2p/go-libp2p-core/peer"
 )
 
 const BootstrapPeerThreshold = 2
@@ -100,6 +100,14 @@ type syncBucketSet struct {
 	buckets []*syncTargetBucket
 }
 
+func newSyncTargetBucket(tipsets ...*types.TipSet) *syncTargetBucket {
+	var stb syncTargetBucket
+	for _, ts := range tipsets {
+		stb.add(ts)
+	}
+	return &stb
+}
+
 func (sbs *syncBucketSet) Insert(ts *types.TipSet) {
 	for _, b := range sbs.buckets {
 		if b.sameChainAs(ts) {
@@ -107,10 +115,7 @@ func (sbs *syncBucketSet) Insert(ts *types.TipSet) {
 			return
 		}
 	}
-	sbs.buckets = append(sbs.buckets, &syncTargetBucket{
-		tips:  []*types.TipSet{ts},
-		count: 1,
-	})
+	sbs.buckets = append(sbs.buckets, newSyncTargetBucket(ts))
 }
 
 func (sbs *syncBucketSet) Pop() *syncTargetBucket {
@@ -166,14 +171,6 @@ type syncTargetBucket struct {
 	count int
 }
 
-func newSyncTargetBucket(tipsets ...*types.TipSet) *syncTargetBucket {
-	var stb syncTargetBucket
-	for _, ts := range tipsets {
-		stb.add(ts)
-	}
-	return &stb
-}
-
 func (stb *syncTargetBucket) sameChainAs(ts *types.TipSet) bool {
 	for _, t := range stb.tips {
 		if ts.Equals(t) {
@@ -231,7 +228,7 @@ func (sm *SyncManager) selectSyncTarget() (*types.TipSet, error) {
 	}
 
 	if len(buckets.buckets) > 1 {
-		log.Warning("caution, multiple distinct chains seen during head selections")
+		log.Warn("caution, multiple distinct chains seen during head selections")
 		// TODO: we *could* refuse to sync here without user intervention.
 		// For now, just select the best cluster
 	}
diff --git a/storage/sector_states.go b/storage/sector_states.go
index ef555a061..4790447e9 100644
--- a/storage/sector_states.go
+++ b/storage/sector_states.go
@@ -84,7 +84,6 @@ func (m *Miner) handleUnsealed(ctx context.Context, sector SectorInfo) *sectorUp
 			TicketBytes: ticket.TicketBytes[:],
 		}
 	})
-
 }
 
 func (m *Miner) handlePreCommitting(ctx context.Context, sector SectorInfo) *sectorUpdate {