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package statesync
import (
"errors"
"sync"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/mock"
"github.com/stretchr/testify/require"
abci "github.com/tendermint/tendermint/abci/types"
"github.com/tendermint/tendermint/libs/log"
"github.com/tendermint/tendermint/p2p"
p2pmocks "github.com/tendermint/tendermint/p2p/mocks"
tmstate "github.com/tendermint/tendermint/proto/tendermint/state"
ssproto "github.com/tendermint/tendermint/proto/tendermint/statesync"
tmversion "github.com/tendermint/tendermint/proto/tendermint/version"
"github.com/tendermint/tendermint/proxy"
proxymocks "github.com/tendermint/tendermint/proxy/mocks"
sm "github.com/tendermint/tendermint/state"
"github.com/tendermint/tendermint/statesync/mocks"
"github.com/tendermint/tendermint/types"
"github.com/tendermint/tendermint/version"
)
// Sets up a basic syncer that can be used to test OfferSnapshot requests
func setupOfferSyncer(t *testing.T) (*syncer, *proxymocks.AppConnSnapshot) {
connQuery := &proxymocks.AppConnQuery{}
connSnapshot := &proxymocks.AppConnSnapshot{}
stateProvider := &mocks.StateProvider{}
stateProvider.On("AppHash", mock.Anything).Return([]byte("app_hash"), nil)
syncer := newSyncer(log.NewNopLogger(), connSnapshot, connQuery, stateProvider, "")
return syncer, connSnapshot
}
// Sets up a simple peer mock with an ID
func simplePeer(id string) *p2pmocks.Peer {
peer := &p2pmocks.Peer{}
peer.On("ID").Return(p2p.ID(id))
return peer
}
func TestSyncer_SyncAny(t *testing.T) {
state := sm.State{
ChainID: "chain",
Version: tmstate.Version{
Consensus: tmversion.Consensus{
Block: version.BlockProtocol,
App: 0,
},
Software: version.TMCoreSemVer,
},
LastBlockHeight: 1,
LastBlockID: types.BlockID{Hash: []byte("blockhash")},
LastBlockTime: time.Now(),
LastResultsHash: []byte("last_results_hash"),
AppHash: []byte("app_hash"),
LastValidators: &types.ValidatorSet{Proposer: &types.Validator{Address: []byte("val1")}},
Validators: &types.ValidatorSet{Proposer: &types.Validator{Address: []byte("val2")}},
NextValidators: &types.ValidatorSet{Proposer: &types.Validator{Address: []byte("val3")}},
ConsensusParams: *types.DefaultConsensusParams(),
LastHeightConsensusParamsChanged: 1,
}
commit := &types.Commit{BlockID: types.BlockID{Hash: []byte("blockhash")}}
chunks := []*chunk{
{Height: 1, Format: 1, Index: 0, Chunk: []byte{1, 1, 0}},
{Height: 1, Format: 1, Index: 1, Chunk: []byte{1, 1, 1}},
{Height: 1, Format: 1, Index: 2, Chunk: []byte{1, 1, 2}},
}
s := &snapshot{Height: 1, Format: 1, Chunks: 3, Hash: []byte{1, 2, 3}}
stateProvider := &mocks.StateProvider{}
stateProvider.On("AppHash", uint64(1)).Return(state.AppHash, nil)
stateProvider.On("AppHash", uint64(2)).Return([]byte("app_hash_2"), nil)
stateProvider.On("Commit", uint64(1)).Return(commit, nil)
stateProvider.On("State", uint64(1)).Return(state, nil)
connSnapshot := &proxymocks.AppConnSnapshot{}
connQuery := &proxymocks.AppConnQuery{}
syncer := newSyncer(log.NewNopLogger(), connSnapshot, connQuery, stateProvider, "")
// Adding a chunk should error when no sync is in progress
_, err := syncer.AddChunk(&chunk{Height: 1, Format: 1, Index: 0, Chunk: []byte{1}})
require.Error(t, err)
// Adding a couple of peers should trigger snapshot discovery messages
peerA := &p2pmocks.Peer{}
peerA.On("ID").Return(p2p.ID("a"))
peerA.On("Send", SnapshotChannel, mustEncodeMsg(&ssproto.SnapshotsRequest{})).Return(true)
syncer.AddPeer(peerA)
peerA.AssertExpectations(t)
peerB := &p2pmocks.Peer{}
peerB.On("ID").Return(p2p.ID("b"))
peerB.On("Send", SnapshotChannel, mustEncodeMsg(&ssproto.SnapshotsRequest{})).Return(true)
syncer.AddPeer(peerB)
peerB.AssertExpectations(t)
// Both peers report back with snapshots. One of them also returns a snapshot we don't want, in
// format 2, which will be rejected by the ABCI application.
new, err := syncer.AddSnapshot(peerA, s)
require.NoError(t, err)
assert.True(t, new)
new, err = syncer.AddSnapshot(peerB, s)
require.NoError(t, err)
assert.False(t, new)
new, err = syncer.AddSnapshot(peerB, &snapshot{Height: 2, Format: 2, Chunks: 3, Hash: []byte{1}})
require.NoError(t, err)
assert.True(t, new)
// We start a sync, with peers sending back chunks when requested. We first reject the snapshot
// with height 2 format 2, and accept the snapshot at height 1.
connSnapshot.On("OfferSnapshotSync", abci.RequestOfferSnapshot{
Snapshot: &abci.Snapshot{
Height: 2,
Format: 2,
Chunks: 3,
Hash: []byte{1},
},
AppHash: []byte("app_hash_2"),
}).Return(&abci.ResponseOfferSnapshot{Result: abci.ResponseOfferSnapshot_REJECT_FORMAT}, nil)
connSnapshot.On("OfferSnapshotSync", abci.RequestOfferSnapshot{
Snapshot: &abci.Snapshot{
Height: s.Height,
Format: s.Format,
Chunks: s.Chunks,
Hash: s.Hash,
Metadata: s.Metadata,
},
AppHash: []byte("app_hash"),
}).Times(2).Return(&abci.ResponseOfferSnapshot{Result: abci.ResponseOfferSnapshot_ACCEPT}, nil)
chunkRequests := make(map[uint32]int)
chunkRequestsMtx := sync.Mutex{}
onChunkRequest := func(args mock.Arguments) {
pb, err := decodeMsg(args[1].([]byte))
require.NoError(t, err)
msg := pb.(*ssproto.ChunkRequest)
require.EqualValues(t, 1, msg.Height)
require.EqualValues(t, 1, msg.Format)
require.LessOrEqual(t, msg.Index, uint32(len(chunks)))
added, err := syncer.AddChunk(chunks[msg.Index])
require.NoError(t, err)
assert.True(t, added)
chunkRequestsMtx.Lock()
chunkRequests[msg.Index]++
chunkRequestsMtx.Unlock()
}
peerA.On("Send", ChunkChannel, mock.Anything).Maybe().Run(onChunkRequest).Return(true)
peerB.On("Send", ChunkChannel, mock.Anything).Maybe().Run(onChunkRequest).Return(true)
// The first time we're applying chunk 2 we tell it to retry the snapshot and discard chunk 1,
// which should cause it to keep the existing chunk 0 and 2, and restart restoration from
// beginning. We also wait for a little while, to exercise the retry logic in fetchChunks().
connSnapshot.On("ApplySnapshotChunkSync", abci.RequestApplySnapshotChunk{
Index: 2, Chunk: []byte{1, 1, 2},
}).Once().Run(func(args mock.Arguments) { time.Sleep(2 * time.Second) }).Return(
&abci.ResponseApplySnapshotChunk{
Result: abci.ResponseApplySnapshotChunk_RETRY_SNAPSHOT,
RefetchChunks: []uint32{1},
}, nil)
connSnapshot.On("ApplySnapshotChunkSync", abci.RequestApplySnapshotChunk{
Index: 0, Chunk: []byte{1, 1, 0},
}).Times(2).Return(&abci.ResponseApplySnapshotChunk{Result: abci.ResponseApplySnapshotChunk_ACCEPT}, nil)
connSnapshot.On("ApplySnapshotChunkSync", abci.RequestApplySnapshotChunk{
Index: 1, Chunk: []byte{1, 1, 1},
}).Times(2).Return(&abci.ResponseApplySnapshotChunk{Result: abci.ResponseApplySnapshotChunk_ACCEPT}, nil)
connSnapshot.On("ApplySnapshotChunkSync", abci.RequestApplySnapshotChunk{
Index: 2, Chunk: []byte{1, 1, 2},
}).Once().Return(&abci.ResponseApplySnapshotChunk{Result: abci.ResponseApplySnapshotChunk_ACCEPT}, nil)
connQuery.On("InfoSync", proxy.RequestInfo).Return(&abci.ResponseInfo{
AppVersion: 9,
LastBlockHeight: 1,
LastBlockAppHash: []byte("app_hash"),
}, nil)
newState, lastCommit, err := syncer.SyncAny(0)
require.NoError(t, err)
chunkRequestsMtx.Lock()
assert.Equal(t, map[uint32]int{0: 1, 1: 2, 2: 1}, chunkRequests)
chunkRequestsMtx.Unlock()
// The syncer should have updated the state app version from the ABCI info response.
expectState := state
expectState.Version.Consensus.App = 9
assert.Equal(t, expectState, newState)
assert.Equal(t, commit, lastCommit)
connSnapshot.AssertExpectations(t)
connQuery.AssertExpectations(t)
peerA.AssertExpectations(t)
peerB.AssertExpectations(t)
}
func TestSyncer_SyncAny_noSnapshots(t *testing.T) {
syncer, _ := setupOfferSyncer(t)
_, _, err := syncer.SyncAny(0)
assert.Equal(t, errNoSnapshots, err)
}
func TestSyncer_SyncAny_ABORT(t *testing.T) {
syncer, connSnapshot := setupOfferSyncer(t)
s := &snapshot{Height: 1, Format: 1, Chunks: 3, Hash: []byte{1, 2, 3}}
syncer.AddSnapshot(simplePeer("id"), s)
connSnapshot.On("OfferSnapshotSync", abci.RequestOfferSnapshot{
Snapshot: toABCI(s), AppHash: []byte("app_hash"),
}).Once().Return(&abci.ResponseOfferSnapshot{Result: abci.ResponseOfferSnapshot_ABORT}, nil)
_, _, err := syncer.SyncAny(0)
assert.Equal(t, errAbort, err)
connSnapshot.AssertExpectations(t)
}
func TestSyncer_SyncAny_reject(t *testing.T) {
syncer, connSnapshot := setupOfferSyncer(t)
// s22 is tried first, then s12, then s11, then errNoSnapshots
s22 := &snapshot{Height: 2, Format: 2, Chunks: 3, Hash: []byte{1, 2, 3}}
s12 := &snapshot{Height: 1, Format: 2, Chunks: 3, Hash: []byte{1, 2, 3}}
s11 := &snapshot{Height: 1, Format: 1, Chunks: 3, Hash: []byte{1, 2, 3}}
syncer.AddSnapshot(simplePeer("id"), s22)
syncer.AddSnapshot(simplePeer("id"), s12)
syncer.AddSnapshot(simplePeer("id"), s11)
connSnapshot.On("OfferSnapshotSync", abci.RequestOfferSnapshot{
Snapshot: toABCI(s22), AppHash: []byte("app_hash"),
}).Once().Return(&abci.ResponseOfferSnapshot{Result: abci.ResponseOfferSnapshot_REJECT}, nil)
connSnapshot.On("OfferSnapshotSync", abci.RequestOfferSnapshot{
Snapshot: toABCI(s12), AppHash: []byte("app_hash"),
}).Once().Return(&abci.ResponseOfferSnapshot{Result: abci.ResponseOfferSnapshot_REJECT}, nil)
connSnapshot.On("OfferSnapshotSync", abci.RequestOfferSnapshot{
Snapshot: toABCI(s11), AppHash: []byte("app_hash"),
}).Once().Return(&abci.ResponseOfferSnapshot{Result: abci.ResponseOfferSnapshot_REJECT}, nil)
_, _, err := syncer.SyncAny(0)
assert.Equal(t, errNoSnapshots, err)
connSnapshot.AssertExpectations(t)
}
func TestSyncer_SyncAny_REJECT_FORMAT(t *testing.T) {
syncer, connSnapshot := setupOfferSyncer(t)
// s22 is tried first, which reject s22 and s12, then s11 will abort.
s22 := &snapshot{Height: 2, Format: 2, Chunks: 3, Hash: []byte{1, 2, 3}}
s12 := &snapshot{Height: 1, Format: 2, Chunks: 3, Hash: []byte{1, 2, 3}}
s11 := &snapshot{Height: 1, Format: 1, Chunks: 3, Hash: []byte{1, 2, 3}}
syncer.AddSnapshot(simplePeer("id"), s22)
syncer.AddSnapshot(simplePeer("id"), s12)
syncer.AddSnapshot(simplePeer("id"), s11)
connSnapshot.On("OfferSnapshotSync", abci.RequestOfferSnapshot{
Snapshot: toABCI(s22), AppHash: []byte("app_hash"),
}).Once().Return(&abci.ResponseOfferSnapshot{Result: abci.ResponseOfferSnapshot_REJECT_FORMAT}, nil)
connSnapshot.On("OfferSnapshotSync", abci.RequestOfferSnapshot{
Snapshot: toABCI(s11), AppHash: []byte("app_hash"),
}).Once().Return(&abci.ResponseOfferSnapshot{Result: abci.ResponseOfferSnapshot_ABORT}, nil)
_, _, err := syncer.SyncAny(0)
assert.Equal(t, errAbort, err)
connSnapshot.AssertExpectations(t)
}
func TestSyncer_SyncAny_reject_sender(t *testing.T) {
syncer, connSnapshot := setupOfferSyncer(t)
peerA := simplePeer("a")
peerB := simplePeer("b")
peerC := simplePeer("c")
// sbc will be offered first, which will be rejected with reject_sender, causing all snapshots
// submitted by both b and c (i.e. sb, sc, sbc) to be rejected. Finally, sa will reject and
// errNoSnapshots is returned.
sa := &snapshot{Height: 1, Format: 1, Chunks: 3, Hash: []byte{1, 2, 3}}
sb := &snapshot{Height: 2, Format: 1, Chunks: 3, Hash: []byte{1, 2, 3}}
sc := &snapshot{Height: 3, Format: 1, Chunks: 3, Hash: []byte{1, 2, 3}}
sbc := &snapshot{Height: 4, Format: 1, Chunks: 3, Hash: []byte{1, 2, 3}}
_, err := syncer.AddSnapshot(peerA, sa)
require.NoError(t, err)
_, err = syncer.AddSnapshot(peerB, sb)
require.NoError(t, err)
_, err = syncer.AddSnapshot(peerC, sc)
require.NoError(t, err)
_, err = syncer.AddSnapshot(peerB, sbc)
require.NoError(t, err)
_, err = syncer.AddSnapshot(peerC, sbc)
require.NoError(t, err)
connSnapshot.On("OfferSnapshotSync", abci.RequestOfferSnapshot{
Snapshot: toABCI(sbc), AppHash: []byte("app_hash"),
}).Once().Return(&abci.ResponseOfferSnapshot{Result: abci.ResponseOfferSnapshot_REJECT_SENDER}, nil)
connSnapshot.On("OfferSnapshotSync", abci.RequestOfferSnapshot{
Snapshot: toABCI(sa), AppHash: []byte("app_hash"),
}).Once().Return(&abci.ResponseOfferSnapshot{Result: abci.ResponseOfferSnapshot_REJECT}, nil)
_, _, err = syncer.SyncAny(0)
assert.Equal(t, errNoSnapshots, err)
connSnapshot.AssertExpectations(t)
}
func TestSyncer_SyncAny_abciError(t *testing.T) {
syncer, connSnapshot := setupOfferSyncer(t)
errBoom := errors.New("boom")
s := &snapshot{Height: 1, Format: 1, Chunks: 3, Hash: []byte{1, 2, 3}}
syncer.AddSnapshot(simplePeer("id"), s)
connSnapshot.On("OfferSnapshotSync", abci.RequestOfferSnapshot{
Snapshot: toABCI(s), AppHash: []byte("app_hash"),
}).Once().Return(nil, errBoom)
_, _, err := syncer.SyncAny(0)
assert.True(t, errors.Is(err, errBoom))
connSnapshot.AssertExpectations(t)
}
func TestSyncer_offerSnapshot(t *testing.T) {
unknownErr := errors.New("unknown error")
boom := errors.New("boom")
testcases := map[string]struct {
result abci.ResponseOfferSnapshot_Result
err error
expectErr error
}{
"accept": {abci.ResponseOfferSnapshot_ACCEPT, nil, nil},
"abort": {abci.ResponseOfferSnapshot_ABORT, nil, errAbort},
"reject": {abci.ResponseOfferSnapshot_REJECT, nil, errRejectSnapshot},
"reject_format": {abci.ResponseOfferSnapshot_REJECT_FORMAT, nil, errRejectFormat},
"reject_sender": {abci.ResponseOfferSnapshot_REJECT_SENDER, nil, errRejectSender},
"error": {0, boom, boom},
"unknown result": {9, nil, unknownErr},
}
for name, tc := range testcases {
tc := tc
t.Run(name, func(t *testing.T) {
syncer, connSnapshot := setupOfferSyncer(t)
s := &snapshot{Height: 1, Format: 1, Chunks: 3, Hash: []byte{1, 2, 3}, trustedAppHash: []byte("app_hash")}
connSnapshot.On("OfferSnapshotSync", abci.RequestOfferSnapshot{
Snapshot: toABCI(s),
AppHash: []byte("app_hash"),
}).Return(&abci.ResponseOfferSnapshot{Result: tc.result}, tc.err)
err := syncer.offerSnapshot(s)
if tc.expectErr == unknownErr {
require.Error(t, err)
} else {
unwrapped := errors.Unwrap(err)
if unwrapped != nil {
err = unwrapped
}
assert.Equal(t, tc.expectErr, err)
}
})
}
}
func TestSyncer_applyChunks_Results(t *testing.T) {
unknownErr := errors.New("unknown error")
boom := errors.New("boom")
testcases := map[string]struct {
result abci.ResponseApplySnapshotChunk_Result
err error
expectErr error
}{
"accept": {abci.ResponseApplySnapshotChunk_ACCEPT, nil, nil},
"abort": {abci.ResponseApplySnapshotChunk_ABORT, nil, errAbort},
"retry": {abci.ResponseApplySnapshotChunk_RETRY, nil, nil},
"retry_snapshot": {abci.ResponseApplySnapshotChunk_RETRY_SNAPSHOT, nil, errRetrySnapshot},
"reject_snapshot": {abci.ResponseApplySnapshotChunk_REJECT_SNAPSHOT, nil, errRejectSnapshot},
"error": {0, boom, boom},
"unknown result": {9, nil, unknownErr},
}
for name, tc := range testcases {
tc := tc
t.Run(name, func(t *testing.T) {
connQuery := &proxymocks.AppConnQuery{}
connSnapshot := &proxymocks.AppConnSnapshot{}
stateProvider := &mocks.StateProvider{}
stateProvider.On("AppHash", mock.Anything).Return([]byte("app_hash"), nil)
syncer := newSyncer(log.NewNopLogger(), connSnapshot, connQuery, stateProvider, "")
body := []byte{1, 2, 3}
chunks, err := newChunkQueue(&snapshot{Height: 1, Format: 1, Chunks: 1}, "")
chunks.Add(&chunk{Height: 1, Format: 1, Index: 0, Chunk: body})
require.NoError(t, err)
connSnapshot.On("ApplySnapshotChunkSync", abci.RequestApplySnapshotChunk{
Index: 0, Chunk: body,
}).Once().Return(&abci.ResponseApplySnapshotChunk{Result: tc.result}, tc.err)
if tc.result == abci.ResponseApplySnapshotChunk_RETRY {
connSnapshot.On("ApplySnapshotChunkSync", abci.RequestApplySnapshotChunk{
Index: 0, Chunk: body,
}).Once().Return(&abci.ResponseApplySnapshotChunk{
Result: abci.ResponseApplySnapshotChunk_ACCEPT}, nil)
}
err = syncer.applyChunks(chunks)
if tc.expectErr == unknownErr {
require.Error(t, err)
} else {
unwrapped := errors.Unwrap(err)
if unwrapped != nil {
err = unwrapped
}
assert.Equal(t, tc.expectErr, err)
}
connSnapshot.AssertExpectations(t)
})
}
}
func TestSyncer_applyChunks_RefetchChunks(t *testing.T) {
// Discarding chunks via refetch_chunks should work the same for all results
testcases := map[string]struct {
result abci.ResponseApplySnapshotChunk_Result
}{
"accept": {abci.ResponseApplySnapshotChunk_ACCEPT},
"abort": {abci.ResponseApplySnapshotChunk_ABORT},
"retry": {abci.ResponseApplySnapshotChunk_RETRY},
"retry_snapshot": {abci.ResponseApplySnapshotChunk_RETRY_SNAPSHOT},
"reject_snapshot": {abci.ResponseApplySnapshotChunk_REJECT_SNAPSHOT},
}
for name, tc := range testcases {
tc := tc
t.Run(name, func(t *testing.T) {
connQuery := &proxymocks.AppConnQuery{}
connSnapshot := &proxymocks.AppConnSnapshot{}
stateProvider := &mocks.StateProvider{}
stateProvider.On("AppHash", mock.Anything).Return([]byte("app_hash"), nil)
syncer := newSyncer(log.NewNopLogger(), connSnapshot, connQuery, stateProvider, "")
chunks, err := newChunkQueue(&snapshot{Height: 1, Format: 1, Chunks: 3}, "")
require.NoError(t, err)
added, err := chunks.Add(&chunk{Height: 1, Format: 1, Index: 0, Chunk: []byte{0}})
require.True(t, added)
require.NoError(t, err)
added, err = chunks.Add(&chunk{Height: 1, Format: 1, Index: 1, Chunk: []byte{1}})
require.True(t, added)
require.NoError(t, err)
added, err = chunks.Add(&chunk{Height: 1, Format: 1, Index: 2, Chunk: []byte{2}})
require.True(t, added)
require.NoError(t, err)
// The first two chunks are accepted, before the last one asks for 1 to be refetched
connSnapshot.On("ApplySnapshotChunkSync", abci.RequestApplySnapshotChunk{
Index: 0, Chunk: []byte{0},
}).Once().Return(&abci.ResponseApplySnapshotChunk{Result: abci.ResponseApplySnapshotChunk_ACCEPT}, nil)
connSnapshot.On("ApplySnapshotChunkSync", abci.RequestApplySnapshotChunk{
Index: 1, Chunk: []byte{1},
}).Once().Return(&abci.ResponseApplySnapshotChunk{Result: abci.ResponseApplySnapshotChunk_ACCEPT}, nil)
connSnapshot.On("ApplySnapshotChunkSync", abci.RequestApplySnapshotChunk{
Index: 2, Chunk: []byte{2},
}).Once().Return(&abci.ResponseApplySnapshotChunk{
Result: tc.result,
RefetchChunks: []uint32{1},
}, nil)
// Since removing the chunk will cause Next() to block, we spawn a goroutine, then
// check the queue contents, and finally close the queue to end the goroutine.
// We don't really care about the result of applyChunks, since it has separate test.
go func() {
syncer.applyChunks(chunks)
}()
time.Sleep(50 * time.Millisecond)
assert.True(t, chunks.Has(0))
assert.False(t, chunks.Has(1))
assert.True(t, chunks.Has(2))
err = chunks.Close()
require.NoError(t, err)
})
}
}
func TestSyncer_applyChunks_RejectSenders(t *testing.T) {
// Banning chunks senders via ban_chunk_senders should work the same for all results
testcases := map[string]struct {
result abci.ResponseApplySnapshotChunk_Result
}{
"accept": {abci.ResponseApplySnapshotChunk_ACCEPT},
"abort": {abci.ResponseApplySnapshotChunk_ABORT},
"retry": {abci.ResponseApplySnapshotChunk_RETRY},
"retry_snapshot": {abci.ResponseApplySnapshotChunk_RETRY_SNAPSHOT},
"reject_snapshot": {abci.ResponseApplySnapshotChunk_REJECT_SNAPSHOT},
}
for name, tc := range testcases {
tc := tc
t.Run(name, func(t *testing.T) {
connQuery := &proxymocks.AppConnQuery{}
connSnapshot := &proxymocks.AppConnSnapshot{}
stateProvider := &mocks.StateProvider{}
stateProvider.On("AppHash", mock.Anything).Return([]byte("app_hash"), nil)
syncer := newSyncer(log.NewNopLogger(), connSnapshot, connQuery, stateProvider, "")
// Set up three peers across two snapshots, and ask for one of them to be banned.
// It should be banned from all snapshots.
peerA := simplePeer("a")
peerB := simplePeer("b")
peerC := simplePeer("c")
s1 := &snapshot{Height: 1, Format: 1, Chunks: 3}
s2 := &snapshot{Height: 2, Format: 1, Chunks: 3}
syncer.AddSnapshot(peerA, s1)
syncer.AddSnapshot(peerA, s2)
syncer.AddSnapshot(peerB, s1)
syncer.AddSnapshot(peerB, s2)
syncer.AddSnapshot(peerC, s1)
syncer.AddSnapshot(peerC, s2)
chunks, err := newChunkQueue(s1, "")
require.NoError(t, err)
added, err := chunks.Add(&chunk{Height: 1, Format: 1, Index: 0, Chunk: []byte{0}, Sender: peerA.ID()})
require.True(t, added)
require.NoError(t, err)
added, err = chunks.Add(&chunk{Height: 1, Format: 1, Index: 1, Chunk: []byte{1}, Sender: peerB.ID()})
require.True(t, added)
require.NoError(t, err)
added, err = chunks.Add(&chunk{Height: 1, Format: 1, Index: 2, Chunk: []byte{2}, Sender: peerC.ID()})
require.True(t, added)
require.NoError(t, err)
// The first two chunks are accepted, before the last one asks for b sender to be rejected
connSnapshot.On("ApplySnapshotChunkSync", abci.RequestApplySnapshotChunk{
Index: 0, Chunk: []byte{0}, Sender: "a",
}).Once().Return(&abci.ResponseApplySnapshotChunk{Result: abci.ResponseApplySnapshotChunk_ACCEPT}, nil)
connSnapshot.On("ApplySnapshotChunkSync", abci.RequestApplySnapshotChunk{
Index: 1, Chunk: []byte{1}, Sender: "b",
}).Once().Return(&abci.ResponseApplySnapshotChunk{Result: abci.ResponseApplySnapshotChunk_ACCEPT}, nil)
connSnapshot.On("ApplySnapshotChunkSync", abci.RequestApplySnapshotChunk{
Index: 2, Chunk: []byte{2}, Sender: "c",
}).Once().Return(&abci.ResponseApplySnapshotChunk{
Result: tc.result,
RejectSenders: []string{string(peerB.ID())},
}, nil)
// On retry, the last chunk will be tried again, so we just accept it then.
if tc.result == abci.ResponseApplySnapshotChunk_RETRY {
connSnapshot.On("ApplySnapshotChunkSync", abci.RequestApplySnapshotChunk{
Index: 2, Chunk: []byte{2}, Sender: "c",
}).Once().Return(&abci.ResponseApplySnapshotChunk{Result: abci.ResponseApplySnapshotChunk_ACCEPT}, nil)
}
// We don't really care about the result of applyChunks, since it has separate test.
// However, it will block on e.g. retry result, so we spawn a goroutine that will
// be shut down when the chunk queue closes.
go func() {
syncer.applyChunks(chunks)
}()
time.Sleep(50 * time.Millisecond)
s1peers := syncer.snapshots.GetPeers(s1)
assert.Len(t, s1peers, 2)
assert.EqualValues(t, "a", s1peers[0].ID())
assert.EqualValues(t, "c", s1peers[1].ID())
syncer.snapshots.GetPeers(s1)
assert.Len(t, s1peers, 2)
assert.EqualValues(t, "a", s1peers[0].ID())
assert.EqualValues(t, "c", s1peers[1].ID())
err = chunks.Close()
require.NoError(t, err)
})
}
}
func TestSyncer_verifyApp(t *testing.T) {
boom := errors.New("boom")
s := &snapshot{Height: 3, Format: 1, Chunks: 5, Hash: []byte{1, 2, 3}, trustedAppHash: []byte("app_hash")}
testcases := map[string]struct {
response *abci.ResponseInfo
err error
expectErr error
}{
"verified": {&abci.ResponseInfo{
LastBlockHeight: 3,
LastBlockAppHash: []byte("app_hash"),
AppVersion: 9,
}, nil, nil},
"invalid height": {&abci.ResponseInfo{
LastBlockHeight: 5,
LastBlockAppHash: []byte("app_hash"),
AppVersion: 9,
}, nil, errVerifyFailed},
"invalid hash": {&abci.ResponseInfo{
LastBlockHeight: 3,
LastBlockAppHash: []byte("xxx"),
AppVersion: 9,
}, nil, errVerifyFailed},
"error": {nil, boom, boom},
}
for name, tc := range testcases {
tc := tc
t.Run(name, func(t *testing.T) {
connQuery := &proxymocks.AppConnQuery{}
connSnapshot := &proxymocks.AppConnSnapshot{}
stateProvider := &mocks.StateProvider{}
syncer := newSyncer(log.NewNopLogger(), connSnapshot, connQuery, stateProvider, "")
connQuery.On("InfoSync", proxy.RequestInfo).Return(tc.response, tc.err)
version, err := syncer.verifyApp(s)
unwrapped := errors.Unwrap(err)
if unwrapped != nil {
err = unwrapped
}
assert.Equal(t, tc.expectErr, err)
if err == nil {
assert.Equal(t, tc.response.AppVersion, version)
}
})
}
}
func toABCI(s *snapshot) *abci.Snapshot {
return &abci.Snapshot{
Height: s.Height,
Format: s.Format,
Chunks: s.Chunks,
Hash: s.Hash,
Metadata: s.Metadata,
}
}