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365 lines
11 KiB
365 lines
11 KiB
package evidence_test
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import (
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"encoding/hex"
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"fmt"
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"sync"
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"testing"
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"time"
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"github.com/go-kit/kit/log/term"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/mock"
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"github.com/stretchr/testify/require"
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dbm "github.com/tendermint/tm-db"
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cfg "github.com/tendermint/tendermint/config"
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"github.com/tendermint/tendermint/crypto"
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"github.com/tendermint/tendermint/crypto/tmhash"
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"github.com/tendermint/tendermint/evidence"
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"github.com/tendermint/tendermint/evidence/mocks"
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"github.com/tendermint/tendermint/libs/log"
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"github.com/tendermint/tendermint/p2p"
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ep "github.com/tendermint/tendermint/proto/tendermint/evidence"
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tmproto "github.com/tendermint/tendermint/proto/tendermint/types"
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sm "github.com/tendermint/tendermint/state"
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"github.com/tendermint/tendermint/types"
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)
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var (
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numEvidence = 10
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timeout = 120 * time.Second // ridiculously high because CircleCI is slow
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)
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// We have N evidence reactors connected to one another. The first reactor
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// receives a number of evidence at varying heights. We test that all
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// other reactors receive the evidence and add it to their own respective
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// evidence pools.
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func TestReactorBroadcastEvidence(t *testing.T) {
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config := cfg.TestConfig()
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N := 7
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// create statedb for everyone
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stateDBs := make([]sm.Store, N)
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val := types.NewMockPV()
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// we need validators saved for heights at least as high as we have evidence for
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height := int64(numEvidence) + 10
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for i := 0; i < N; i++ {
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stateDBs[i] = initializeValidatorState(val, height)
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}
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// make reactors from statedb
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reactors, pools := makeAndConnectReactorsAndPools(config, stateDBs)
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// set the peer height on each reactor
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for _, r := range reactors {
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for _, peer := range r.Switch.Peers().List() {
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ps := peerState{height}
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peer.Set(types.PeerStateKey, ps)
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}
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}
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// send a bunch of valid evidence to the first reactor's evpool
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// and wait for them all to be received in the others
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evList := sendEvidence(t, pools[0], val, numEvidence)
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waitForEvidence(t, evList, pools)
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}
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// We have two evidence reactors connected to one another but are at different heights.
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// Reactor 1 which is ahead receives a number of evidence. It should only send the evidence
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// that is below the height of the peer to that peer.
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func TestReactorSelectiveBroadcast(t *testing.T) {
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config := cfg.TestConfig()
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val := types.NewMockPV()
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height1 := int64(numEvidence) + 10
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height2 := int64(numEvidence) / 2
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// DB1 is ahead of DB2
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stateDB1 := initializeValidatorState(val, height1)
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stateDB2 := initializeValidatorState(val, height2)
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// make reactors from statedb
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reactors, pools := makeAndConnectReactorsAndPools(config, []sm.Store{stateDB1, stateDB2})
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// set the peer height on each reactor
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for _, r := range reactors {
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for _, peer := range r.Switch.Peers().List() {
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ps := peerState{height1}
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peer.Set(types.PeerStateKey, ps)
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}
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}
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// update the first reactor peer's height to be very small
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peer := reactors[0].Switch.Peers().List()[0]
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ps := peerState{height2}
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peer.Set(types.PeerStateKey, ps)
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// send a bunch of valid evidence to the first reactor's evpool
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evList := sendEvidence(t, pools[0], val, numEvidence)
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// only ones less than the peers height should make it through
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waitForEvidence(t, evList[:numEvidence/2-1], []*evidence.Pool{pools[1]})
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// peers should still be connected
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peers := reactors[1].Switch.Peers().List()
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assert.Equal(t, 1, len(peers))
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}
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// This tests aims to ensure that reactors don't send evidence that they have committed or that ar
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// not ready for the peer through three scenarios.
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// First, committed evidence to a newly connected peer
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// Second, evidence to a peer that is behind
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// Third, evidence that was pending and became committed just before the peer caught up
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func TestReactorsGossipNoCommittedEvidence(t *testing.T) {
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config := cfg.TestConfig()
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val := types.NewMockPV()
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var height int64 = 10
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// DB1 is ahead of DB2
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stateDB1 := initializeValidatorState(val, height)
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stateDB2 := initializeValidatorState(val, height-2)
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// make reactors from statedb
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reactors, pools := makeAndConnectReactorsAndPools(config, []sm.Store{stateDB1, stateDB2})
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evList := sendEvidence(t, pools[0], val, 2)
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abciEvs := pools[0].ABCIEvidence(height, evList)
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require.EqualValues(t, 2, len(abciEvs))
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require.EqualValues(t, uint32(0), pools[0].Size())
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time.Sleep(100 * time.Millisecond)
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peer := reactors[0].Switch.Peers().List()[0]
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ps := peerState{height - 2}
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peer.Set(types.PeerStateKey, ps)
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peer = reactors[1].Switch.Peers().List()[0]
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ps = peerState{height}
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peer.Set(types.PeerStateKey, ps)
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// wait to see that no evidence comes through
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time.Sleep(300 * time.Millisecond)
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// the second pool should not have received any evidence because it has already been committed
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assert.Equal(t, uint32(0), pools[1].Size(), "second reactor should not have received evidence")
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// the first reactor receives three more evidence
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evList = make([]types.Evidence, 3)
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for i := 0; i < 3; i++ {
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ev := types.NewMockDuplicateVoteEvidenceWithValidator(height-3+int64(i),
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time.Date(2019, 1, 1, 0, 0, 0, 0, time.UTC), val, evidenceChainID)
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err := pools[0].AddEvidence(ev)
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require.NoError(t, err)
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evList[i] = ev
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}
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// wait to see that only one evidence is sent
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time.Sleep(300 * time.Millisecond)
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// the second pool should only have received the first evidence because it is behind
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peerEv, _ := pools[1].PendingEvidence(1000)
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assert.EqualValues(t, []types.Evidence{evList[0]}, peerEv)
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// the last evidence is committed and the second reactor catches up in state to the first
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// reactor. We therefore expect that the second reactor only receives one more evidence, the
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// one that is still pending and not the evidence that has already been committed.
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_ = pools[0].ABCIEvidence(height, []types.Evidence{evList[2]})
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// the first reactor should have the two remaining pending evidence
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require.EqualValues(t, uint32(2), pools[0].Size())
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// now update the state of the second reactor
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pools[1].Update(sm.State{LastBlockHeight: height})
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peer = reactors[0].Switch.Peers().List()[0]
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ps = peerState{height}
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peer.Set(types.PeerStateKey, ps)
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// wait to see that only two evidence is sent
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time.Sleep(300 * time.Millisecond)
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peerEv, _ = pools[1].PendingEvidence(1000)
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assert.EqualValues(t, evList[0:1], peerEv)
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}
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// evidenceLogger is a TestingLogger which uses a different
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// color for each validator ("validator" key must exist).
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func evidenceLogger() log.Logger {
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return log.TestingLoggerWithColorFn(func(keyvals ...interface{}) term.FgBgColor {
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for i := 0; i < len(keyvals)-1; i += 2 {
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if keyvals[i] == "validator" {
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return term.FgBgColor{Fg: term.Color(uint8(keyvals[i+1].(int) + 1))}
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}
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}
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return term.FgBgColor{}
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})
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}
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// connect N evidence reactors through N switches
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func makeAndConnectReactorsAndPools(config *cfg.Config, stateStores []sm.Store) ([]*evidence.Reactor,
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[]*evidence.Pool) {
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N := len(stateStores)
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reactors := make([]*evidence.Reactor, N)
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pools := make([]*evidence.Pool, N)
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logger := evidenceLogger()
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evidenceTime := time.Date(2019, 1, 1, 0, 0, 0, 0, time.UTC)
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for i := 0; i < N; i++ {
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evidenceDB := dbm.NewMemDB()
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blockStore := &mocks.BlockStore{}
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blockStore.On("LoadBlockMeta", mock.AnythingOfType("int64")).Return(
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&types.BlockMeta{Header: types.Header{Time: evidenceTime}},
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)
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pool, err := evidence.NewPool(evidenceDB, stateStores[i], blockStore)
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if err != nil {
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panic(err)
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}
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pools[i] = pool
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reactors[i] = evidence.NewReactor(pool)
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reactors[i].SetLogger(logger.With("validator", i))
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}
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p2p.MakeConnectedSwitches(config.P2P, N, func(i int, s *p2p.Switch) *p2p.Switch {
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s.AddReactor("EVIDENCE", reactors[i])
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return s
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}, p2p.Connect2Switches)
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return reactors, pools
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}
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// wait for all evidence on all reactors
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func waitForEvidence(t *testing.T, evs types.EvidenceList, pools []*evidence.Pool) {
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// wait for the evidence in all evpools
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wg := new(sync.WaitGroup)
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for i := 0; i < len(pools); i++ {
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wg.Add(1)
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go _waitForEvidence(t, wg, evs, i, pools)
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}
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done := make(chan struct{})
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go func() {
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wg.Wait()
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close(done)
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}()
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timer := time.After(timeout)
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select {
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case <-timer:
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t.Fatal("Timed out waiting for evidence")
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case <-done:
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}
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}
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// wait for all evidence on a single evpool
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func _waitForEvidence(
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t *testing.T,
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wg *sync.WaitGroup,
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evs types.EvidenceList,
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poolIdx int,
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pools []*evidence.Pool,
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) {
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evpool := pools[poolIdx]
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var evList []types.Evidence
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currentPoolSize := 0
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for currentPoolSize != len(evs) {
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evList, _ = evpool.PendingEvidence(int64(len(evs) * 500)) // each evidence should not be more than 500 bytes
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currentPoolSize = len(evList)
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time.Sleep(time.Millisecond * 100)
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}
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// put the reaped evidence in a map so we can quickly check we got everything
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evMap := make(map[string]types.Evidence)
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for _, e := range evList {
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evMap[string(e.Hash())] = e
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}
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for i, expectedEv := range evs {
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gotEv := evMap[string(expectedEv.Hash())]
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assert.Equal(t, expectedEv, gotEv,
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fmt.Sprintf("evidence at index %d on pool %d don't match: %v vs %v",
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i, poolIdx, expectedEv, gotEv))
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}
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wg.Done()
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}
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func sendEvidence(t *testing.T, evpool *evidence.Pool, val types.PrivValidator, n int) types.EvidenceList {
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evList := make([]types.Evidence, n)
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for i := 0; i < n; i++ {
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ev := types.NewMockDuplicateVoteEvidenceWithValidator(int64(i+1),
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time.Date(2019, 1, 1, 0, 0, 0, 0, time.UTC), val, evidenceChainID)
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err := evpool.AddEvidence(ev)
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require.NoError(t, err)
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evList[i] = ev
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}
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return evList
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}
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type peerState struct {
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height int64
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}
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func (ps peerState) GetHeight() int64 {
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return ps.height
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}
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func exampleVote(t byte) *types.Vote {
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var stamp, err = time.Parse(types.TimeFormat, "2017-12-25T03:00:01.234Z")
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if err != nil {
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panic(err)
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}
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return &types.Vote{
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Type: tmproto.SignedMsgType(t),
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Height: 3,
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Round: 2,
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Timestamp: stamp,
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BlockID: types.BlockID{
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Hash: tmhash.Sum([]byte("blockID_hash")),
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PartSetHeader: types.PartSetHeader{
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Total: 1000000,
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Hash: tmhash.Sum([]byte("blockID_part_set_header_hash")),
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},
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},
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ValidatorAddress: crypto.AddressHash([]byte("validator_address")),
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ValidatorIndex: 56789,
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}
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}
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// nolint:lll //ignore line length for tests
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func TestEvidenceVectors(t *testing.T) {
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dupl := types.NewDuplicateVoteEvidence(exampleVote(1), exampleVote(2))
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testCases := []struct {
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testName string
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evidenceList []types.Evidence
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expBytes string
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}{
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{"DuplicateVoteEvidence", []types.Evidence{dupl}, "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"},
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}
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for _, tc := range testCases {
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tc := tc
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evi := make([]*tmproto.Evidence, len(tc.evidenceList))
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for i := 0; i < len(tc.evidenceList); i++ {
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ev, err := types.EvidenceToProto(tc.evidenceList[i])
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require.NoError(t, err, tc.testName)
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evi[i] = ev
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}
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epl := ep.List{
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Evidence: evi,
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}
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bz, err := epl.Marshal()
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require.NoError(t, err, tc.testName)
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require.Equal(t, tc.expBytes, hex.EncodeToString(bz), tc.testName)
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}
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}
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