package channeldb_test import ( "bytes" "io/ioutil" "path/filepath" "runtime" "testing" "github.com/coreos/bbolt" "github.com/lightningnetwork/lnd/channeldb" "github.com/lightningnetwork/lnd/lnwire" "github.com/btcsuite/btcd/wire" ) // TestPkgFilterBruteForce tests the behavior of a pkg filter up to size 1000, // which is greater than the number of HTLCs we permit on a commitment txn. // This should encapsulate every potential filter used in practice. func TestPkgFilterBruteForce(t *testing.T) { t.Parallel() checkPkgFilterRange(t, 1000) } // checkPkgFilterRange verifies the behavior of a pkg filter when doing a linear // insertion of `high` elements. This is primarily to test that IsFull functions // properly for all relevant sizes of `high`. func checkPkgFilterRange(t *testing.T, high int) { for i := uint16(0); i < uint16(high); i++ { f := channeldb.NewPkgFilter(i) if f.Count() != i { t.Fatalf("pkg filter count=%d is actually %d", i, f.Count()) } checkPkgFilterEncodeDecode(t, i, f) for j := uint16(0); j < i; j++ { if f.Contains(j) { t.Fatalf("pkg filter count=%d contains %d "+ "before being added", i, j) } f.Set(j) checkPkgFilterEncodeDecode(t, i, f) if !f.Contains(j) { t.Fatalf("pkg filter count=%d missing %d "+ "after being added", i, j) } if j < i-1 && f.IsFull() { t.Fatalf("pkg filter count=%d already full", i) } } if !f.IsFull() { t.Fatalf("pkg filter count=%d not full", i) } checkPkgFilterEncodeDecode(t, i, f) } } // TestPkgFilterRand uses a random permutation to verify the proper behavior of // the pkg filter if the entries are not inserted in-order. func TestPkgFilterRand(t *testing.T) { t.Parallel() checkPkgFilterRand(t, 3, 17) } // checkPkgFilterRand checks the behavior of a pkg filter by randomly inserting // indices and asserting the invariants. The order in which indices are inserted // is parameterized by a base `b` coprime to `p`, and using modular // exponentiation to generate all elements in [1,p). func checkPkgFilterRand(t *testing.T, b, p uint16) { f := channeldb.NewPkgFilter(p) var j = b for i := uint16(1); i < p; i++ { if f.Contains(j) { t.Fatalf("pkg filter contains %d-%d "+ "before being added", i, j) } f.Set(j) checkPkgFilterEncodeDecode(t, i, f) if !f.Contains(j) { t.Fatalf("pkg filter missing %d-%d "+ "after being added", i, j) } if i < p-1 && f.IsFull() { t.Fatalf("pkg filter %d already full", i) } checkPkgFilterEncodeDecode(t, i, f) j = (b * j) % p } // Set 0 independently, since it will never be emitted by the generator. f.Set(0) checkPkgFilterEncodeDecode(t, p, f) if !f.IsFull() { t.Fatalf("pkg filter count=%d not full", p) } checkPkgFilterEncodeDecode(t, p, f) } // checkPkgFilterEncodeDecode tests the serialization of a pkg filter by: // 1) writing it to a buffer // 2) verifying the number of bytes written matches the filter's Size() // 3) reconstructing the filter decoding the bytes // 4) checking that the two filters are the same according to Equal func checkPkgFilterEncodeDecode(t *testing.T, i uint16, f *channeldb.PkgFilter) { var b bytes.Buffer if err := f.Encode(&b); err != nil { t.Fatalf("unable to serialize pkg filter: %v", err) } // +2 for uint16 length size := uint16(len(b.Bytes())) if size != f.Size() { t.Fatalf("pkg filter count=%d serialized size differs, "+ "Size(): %d, len(bytes): %v", i, f.Size(), size) } reader := bytes.NewReader(b.Bytes()) f2 := &channeldb.PkgFilter{} if err := f2.Decode(reader); err != nil { t.Fatalf("unable to deserialize pkg filter: %v", err) } if !f.Equal(f2) { t.Fatalf("pkg filter count=%v does is not equal "+ "after deserialization, want: %v, got %v", i, f, f2) } } var ( chanID = lnwire.NewChanIDFromOutPoint(&wire.OutPoint{}) adds = []channeldb.LogUpdate{ { LogIndex: 0, UpdateMsg: &lnwire.UpdateAddHTLC{ ChanID: chanID, ID: 1, Amount: 100, Expiry: 1000, PaymentHash: [32]byte{0}, }, }, { LogIndex: 1, UpdateMsg: &lnwire.UpdateAddHTLC{ ChanID: chanID, ID: 1, Amount: 101, Expiry: 1001, PaymentHash: [32]byte{1}, }, }, } settleFails = []channeldb.LogUpdate{ { LogIndex: 2, UpdateMsg: &lnwire.UpdateFulfillHTLC{ ChanID: chanID, ID: 0, PaymentPreimage: [32]byte{0}, }, }, { LogIndex: 3, UpdateMsg: &lnwire.UpdateFailHTLC{ ChanID: chanID, ID: 1, Reason: []byte{}, }, }, } ) // TestPackagerEmptyFwdPkg checks that the state transitions exhibited by a // forwarding package that contains no adds, fails or settles. We expect that // the fwdpkg reaches FwdStateCompleted immediately after writing the forwarding // decision via SetFwdFilter. func TestPackagerEmptyFwdPkg(t *testing.T) { t.Parallel() db := makeFwdPkgDB(t, "") shortChanID := lnwire.NewShortChanIDFromInt(1) packager := channeldb.NewChannelPackager(shortChanID) // To begin, there should be no forwarding packages on disk. fwdPkgs := loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 0 { t.Fatalf("no forwarding packages should exist, found %d", len(fwdPkgs)) } // Next, create and write a new forwarding package with no htlcs. fwdPkg := channeldb.NewFwdPkg(shortChanID, 0, nil, nil) if err := db.Update(func(tx *bolt.Tx) error { return packager.AddFwdPkg(tx, fwdPkg) }); err != nil { t.Fatalf("unable to add fwd pkg: %v", err) } // There should now be one fwdpkg on disk. Since no forwarding decision // has been written, we expect it to be FwdStateLockedIn. With no HTLCs, // the ack filter will have no elements, and should always return true. fwdPkgs = loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 1 { t.Fatalf("expected 1 fwdpkg, instead found %d", len(fwdPkgs)) } assertFwdPkgState(t, fwdPkgs[0], channeldb.FwdStateLockedIn) assertFwdPkgNumAddsSettleFails(t, fwdPkgs[0], 0, 0) assertAckFilterIsFull(t, fwdPkgs[0], true) // Now, write the forwarding decision. In this case, its just an empty // fwd filter. if err := db.Update(func(tx *bolt.Tx) error { return packager.SetFwdFilter(tx, fwdPkg.Height, fwdPkg.FwdFilter) }); err != nil { t.Fatalf("unable to set fwdfiter: %v", err) } // We should still have one package on disk. Since the forwarding // decision has been written, it will minimally be in FwdStateProcessed. // However with no htlcs, it should leap frog to FwdStateCompleted. fwdPkgs = loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 1 { t.Fatalf("expected 1 fwdpkg, instead found %d", len(fwdPkgs)) } assertFwdPkgState(t, fwdPkgs[0], channeldb.FwdStateCompleted) assertFwdPkgNumAddsSettleFails(t, fwdPkgs[0], 0, 0) assertAckFilterIsFull(t, fwdPkgs[0], true) // Lastly, remove the completed forwarding package from disk. if err := db.Update(func(tx *bolt.Tx) error { return packager.RemovePkg(tx, fwdPkg.Height) }); err != nil { t.Fatalf("unable to remove fwdpkg: %v", err) } // Check that the fwd package was actually removed. fwdPkgs = loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 0 { t.Fatalf("no forwarding packages should exist, found %d", len(fwdPkgs)) } } // TestPackagerOnlyAdds checks that the fwdpkg does not reach FwdStateCompleted // as soon as all the adds in the package have been acked using AckAddHtlcs. func TestPackagerOnlyAdds(t *testing.T) { t.Parallel() db := makeFwdPkgDB(t, "") shortChanID := lnwire.NewShortChanIDFromInt(1) packager := channeldb.NewChannelPackager(shortChanID) // To begin, there should be no forwarding packages on disk. fwdPkgs := loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 0 { t.Fatalf("no forwarding packages should exist, found %d", len(fwdPkgs)) } // Next, create and write a new forwarding package that only has add // htlcs. fwdPkg := channeldb.NewFwdPkg(shortChanID, 0, adds, nil) nAdds := len(adds) if err := db.Update(func(tx *bolt.Tx) error { return packager.AddFwdPkg(tx, fwdPkg) }); err != nil { t.Fatalf("unable to add fwd pkg: %v", err) } // There should now be one fwdpkg on disk. Since no forwarding decision // has been written, we expect it to be FwdStateLockedIn. The package // has unacked add HTLCs, so the ack filter should not be full. fwdPkgs = loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 1 { t.Fatalf("expected 1 fwdpkg, instead found %d", len(fwdPkgs)) } assertFwdPkgState(t, fwdPkgs[0], channeldb.FwdStateLockedIn) assertFwdPkgNumAddsSettleFails(t, fwdPkgs[0], nAdds, 0) assertAckFilterIsFull(t, fwdPkgs[0], false) // Now, write the forwarding decision. Since we have not explicitly // added any adds to the fwdfilter, this would indicate that all of the // adds were 1) settled locally by this link (exit hop), or 2) the htlc // was failed locally. if err := db.Update(func(tx *bolt.Tx) error { return packager.SetFwdFilter(tx, fwdPkg.Height, fwdPkg.FwdFilter) }); err != nil { t.Fatalf("unable to set fwdfiter: %v", err) } for i := range adds { // We should still have one package on disk. Since the forwarding // decision has been written, it will minimally be in FwdStateProcessed. // However not allf of the HTLCs have been acked, so should not // have advanced further. fwdPkgs = loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 1 { t.Fatalf("expected 1 fwdpkg, instead found %d", len(fwdPkgs)) } assertFwdPkgState(t, fwdPkgs[0], channeldb.FwdStateProcessed) assertFwdPkgNumAddsSettleFails(t, fwdPkgs[0], nAdds, 0) assertAckFilterIsFull(t, fwdPkgs[0], false) addRef := channeldb.AddRef{ Height: fwdPkg.Height, Index: uint16(i), } if err := db.Update(func(tx *bolt.Tx) error { return packager.AckAddHtlcs(tx, addRef) }); err != nil { t.Fatalf("unable to ack add htlc: %v", err) } } // We should still have one package on disk. Now that all adds have been // acked, the ack filter should return true and the package should be // FwdStateCompleted since there are no other settle/fail packets. fwdPkgs = loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 1 { t.Fatalf("expected 1 fwdpkg, instead found %d", len(fwdPkgs)) } assertFwdPkgState(t, fwdPkgs[0], channeldb.FwdStateCompleted) assertFwdPkgNumAddsSettleFails(t, fwdPkgs[0], nAdds, 0) assertAckFilterIsFull(t, fwdPkgs[0], true) // Lastly, remove the completed forwarding package from disk. if err := db.Update(func(tx *bolt.Tx) error { return packager.RemovePkg(tx, fwdPkg.Height) }); err != nil { t.Fatalf("unable to remove fwdpkg: %v", err) } // Check that the fwd package was actually removed. fwdPkgs = loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 0 { t.Fatalf("no forwarding packages should exist, found %d", len(fwdPkgs)) } } // TestPackagerOnlySettleFails asserts that the fwdpkg remains in // FwdStateProcessed after writing the forwarding decision when there are no // adds in the fwdpkg. We expect this because an empty FwdFilter will always // return true, but we are still waiting for the remaining fails and settles to // be deleted. func TestPackagerOnlySettleFails(t *testing.T) { t.Parallel() db := makeFwdPkgDB(t, "") shortChanID := lnwire.NewShortChanIDFromInt(1) packager := channeldb.NewChannelPackager(shortChanID) // To begin, there should be no forwarding packages on disk. fwdPkgs := loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 0 { t.Fatalf("no forwarding packages should exist, found %d", len(fwdPkgs)) } // Next, create and write a new forwarding package that only has add // htlcs. fwdPkg := channeldb.NewFwdPkg(shortChanID, 0, nil, settleFails) nSettleFails := len(settleFails) if err := db.Update(func(tx *bolt.Tx) error { return packager.AddFwdPkg(tx, fwdPkg) }); err != nil { t.Fatalf("unable to add fwd pkg: %v", err) } // There should now be one fwdpkg on disk. Since no forwarding decision // has been written, we expect it to be FwdStateLockedIn. The package // has unacked add HTLCs, so the ack filter should not be full. fwdPkgs = loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 1 { t.Fatalf("expected 1 fwdpkg, instead found %d", len(fwdPkgs)) } assertFwdPkgState(t, fwdPkgs[0], channeldb.FwdStateLockedIn) assertFwdPkgNumAddsSettleFails(t, fwdPkgs[0], 0, nSettleFails) assertAckFilterIsFull(t, fwdPkgs[0], true) // Now, write the forwarding decision. Since we have not explicitly // added any adds to the fwdfilter, this would indicate that all of the // adds were 1) settled locally by this link (exit hop), or 2) the htlc // was failed locally. if err := db.Update(func(tx *bolt.Tx) error { return packager.SetFwdFilter(tx, fwdPkg.Height, fwdPkg.FwdFilter) }); err != nil { t.Fatalf("unable to set fwdfiter: %v", err) } for i := range settleFails { // We should still have one package on disk. Since the // forwarding decision has been written, it will minimally be in // FwdStateProcessed. However, not all of the HTLCs have been // acked, so should not have advanced further. fwdPkgs = loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 1 { t.Fatalf("expected 1 fwdpkg, instead found %d", len(fwdPkgs)) } assertFwdPkgState(t, fwdPkgs[0], channeldb.FwdStateProcessed) assertFwdPkgNumAddsSettleFails(t, fwdPkgs[0], 0, nSettleFails) assertSettleFailFilterIsFull(t, fwdPkgs[0], false) assertAckFilterIsFull(t, fwdPkgs[0], true) failSettleRef := channeldb.SettleFailRef{ Source: shortChanID, Height: fwdPkg.Height, Index: uint16(i), } if err := db.Update(func(tx *bolt.Tx) error { return packager.AckSettleFails(tx, failSettleRef) }); err != nil { t.Fatalf("unable to ack add htlc: %v", err) } } // We should still have one package on disk. Now that all settles and // fails have been removed, package should be FwdStateCompleted since // there are no other add packets. fwdPkgs = loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 1 { t.Fatalf("expected 1 fwdpkg, instead found %d", len(fwdPkgs)) } assertFwdPkgState(t, fwdPkgs[0], channeldb.FwdStateCompleted) assertFwdPkgNumAddsSettleFails(t, fwdPkgs[0], 0, nSettleFails) assertSettleFailFilterIsFull(t, fwdPkgs[0], true) assertAckFilterIsFull(t, fwdPkgs[0], true) // Lastly, remove the completed forwarding package from disk. if err := db.Update(func(tx *bolt.Tx) error { return packager.RemovePkg(tx, fwdPkg.Height) }); err != nil { t.Fatalf("unable to remove fwdpkg: %v", err) } // Check that the fwd package was actually removed. fwdPkgs = loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 0 { t.Fatalf("no forwarding packages should exist, found %d", len(fwdPkgs)) } } // TestPackagerAddsThenSettleFails writes a fwdpkg containing both adds and // settle/fails, then checks the behavior when the adds are acked before any of // the settle fails. Here we expect pkg to remain in FwdStateProcessed while the // remainder of the fail/settles are being deleted. func TestPackagerAddsThenSettleFails(t *testing.T) { t.Parallel() db := makeFwdPkgDB(t, "") shortChanID := lnwire.NewShortChanIDFromInt(1) packager := channeldb.NewChannelPackager(shortChanID) // To begin, there should be no forwarding packages on disk. fwdPkgs := loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 0 { t.Fatalf("no forwarding packages should exist, found %d", len(fwdPkgs)) } // Next, create and write a new forwarding package that only has add // htlcs. fwdPkg := channeldb.NewFwdPkg(shortChanID, 0, adds, settleFails) nAdds := len(adds) nSettleFails := len(settleFails) if err := db.Update(func(tx *bolt.Tx) error { return packager.AddFwdPkg(tx, fwdPkg) }); err != nil { t.Fatalf("unable to add fwd pkg: %v", err) } // There should now be one fwdpkg on disk. Since no forwarding decision // has been written, we expect it to be FwdStateLockedIn. The package // has unacked add HTLCs, so the ack filter should not be full. fwdPkgs = loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 1 { t.Fatalf("expected 1 fwdpkg, instead found %d", len(fwdPkgs)) } assertFwdPkgState(t, fwdPkgs[0], channeldb.FwdStateLockedIn) assertFwdPkgNumAddsSettleFails(t, fwdPkgs[0], nAdds, nSettleFails) assertAckFilterIsFull(t, fwdPkgs[0], false) // Now, write the forwarding decision. Since we have not explicitly // added any adds to the fwdfilter, this would indicate that all of the // adds were 1) settled locally by this link (exit hop), or 2) the htlc // was failed locally. if err := db.Update(func(tx *bolt.Tx) error { return packager.SetFwdFilter(tx, fwdPkg.Height, fwdPkg.FwdFilter) }); err != nil { t.Fatalf("unable to set fwdfiter: %v", err) } for i := range adds { // We should still have one package on disk. Since the forwarding // decision has been written, it will minimally be in FwdStateProcessed. // However not allf of the HTLCs have been acked, so should not // have advanced further. fwdPkgs = loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 1 { t.Fatalf("expected 1 fwdpkg, instead found %d", len(fwdPkgs)) } assertFwdPkgState(t, fwdPkgs[0], channeldb.FwdStateProcessed) assertFwdPkgNumAddsSettleFails(t, fwdPkgs[0], nAdds, nSettleFails) assertSettleFailFilterIsFull(t, fwdPkgs[0], false) assertAckFilterIsFull(t, fwdPkgs[0], false) addRef := channeldb.AddRef{ Height: fwdPkg.Height, Index: uint16(i), } if err := db.Update(func(tx *bolt.Tx) error { return packager.AckAddHtlcs(tx, addRef) }); err != nil { t.Fatalf("unable to ack add htlc: %v", err) } } for i := range settleFails { // We should still have one package on disk. Since the // forwarding decision has been written, it will minimally be in // FwdStateProcessed. However not allf of the HTLCs have been // acked, so should not have advanced further. fwdPkgs = loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 1 { t.Fatalf("expected 1 fwdpkg, instead found %d", len(fwdPkgs)) } assertFwdPkgState(t, fwdPkgs[0], channeldb.FwdStateProcessed) assertFwdPkgNumAddsSettleFails(t, fwdPkgs[0], nAdds, nSettleFails) assertSettleFailFilterIsFull(t, fwdPkgs[0], false) assertAckFilterIsFull(t, fwdPkgs[0], true) failSettleRef := channeldb.SettleFailRef{ Source: shortChanID, Height: fwdPkg.Height, Index: uint16(i), } if err := db.Update(func(tx *bolt.Tx) error { return packager.AckSettleFails(tx, failSettleRef) }); err != nil { t.Fatalf("unable to remove settle/fail htlc: %v", err) } } // We should still have one package on disk. Now that all settles and // fails have been removed, package should be FwdStateCompleted since // there are no other add packets. fwdPkgs = loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 1 { t.Fatalf("expected 1 fwdpkg, instead found %d", len(fwdPkgs)) } assertFwdPkgState(t, fwdPkgs[0], channeldb.FwdStateCompleted) assertFwdPkgNumAddsSettleFails(t, fwdPkgs[0], nAdds, nSettleFails) assertSettleFailFilterIsFull(t, fwdPkgs[0], true) assertAckFilterIsFull(t, fwdPkgs[0], true) // Lastly, remove the completed forwarding package from disk. if err := db.Update(func(tx *bolt.Tx) error { return packager.RemovePkg(tx, fwdPkg.Height) }); err != nil { t.Fatalf("unable to remove fwdpkg: %v", err) } // Check that the fwd package was actually removed. fwdPkgs = loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 0 { t.Fatalf("no forwarding packages should exist, found %d", len(fwdPkgs)) } } // TestPackagerSettleFailsThenAdds writes a fwdpkg with both adds and // settle/fails, then checks the behavior when the settle/fails are removed // before any of the adds have been acked. This should cause the fwdpkg to // remain in FwdStateProcessed until the final ack is recorded, at which point // it should be promoted directly to FwdStateCompleted.since all adds have been // removed. func TestPackagerSettleFailsThenAdds(t *testing.T) { t.Parallel() db := makeFwdPkgDB(t, "") shortChanID := lnwire.NewShortChanIDFromInt(1) packager := channeldb.NewChannelPackager(shortChanID) // To begin, there should be no forwarding packages on disk. fwdPkgs := loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 0 { t.Fatalf("no forwarding packages should exist, found %d", len(fwdPkgs)) } // Next, create and write a new forwarding package that has both add // and settle/fail htlcs. fwdPkg := channeldb.NewFwdPkg(shortChanID, 0, adds, settleFails) nAdds := len(adds) nSettleFails := len(settleFails) if err := db.Update(func(tx *bolt.Tx) error { return packager.AddFwdPkg(tx, fwdPkg) }); err != nil { t.Fatalf("unable to add fwd pkg: %v", err) } // There should now be one fwdpkg on disk. Since no forwarding decision // has been written, we expect it to be FwdStateLockedIn. The package // has unacked add HTLCs, so the ack filter should not be full. fwdPkgs = loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 1 { t.Fatalf("expected 1 fwdpkg, instead found %d", len(fwdPkgs)) } assertFwdPkgState(t, fwdPkgs[0], channeldb.FwdStateLockedIn) assertFwdPkgNumAddsSettleFails(t, fwdPkgs[0], nAdds, nSettleFails) assertAckFilterIsFull(t, fwdPkgs[0], false) // Now, write the forwarding decision. Since we have not explicitly // added any adds to the fwdfilter, this would indicate that all of the // adds were 1) settled locally by this link (exit hop), or 2) the htlc // was failed locally. if err := db.Update(func(tx *bolt.Tx) error { return packager.SetFwdFilter(tx, fwdPkg.Height, fwdPkg.FwdFilter) }); err != nil { t.Fatalf("unable to set fwdfiter: %v", err) } // Simulate another channel deleting the settle/fails it received from // the original fwd pkg. // TODO(conner): use different packager/s? for i := range settleFails { // We should still have one package on disk. Since the // forwarding decision has been written, it will minimally be in // FwdStateProcessed. However none all of the add HTLCs have // been acked, so should not have advanced further. fwdPkgs = loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 1 { t.Fatalf("expected 1 fwdpkg, instead found %d", len(fwdPkgs)) } assertFwdPkgState(t, fwdPkgs[0], channeldb.FwdStateProcessed) assertFwdPkgNumAddsSettleFails(t, fwdPkgs[0], nAdds, nSettleFails) assertSettleFailFilterIsFull(t, fwdPkgs[0], false) assertAckFilterIsFull(t, fwdPkgs[0], false) failSettleRef := channeldb.SettleFailRef{ Source: shortChanID, Height: fwdPkg.Height, Index: uint16(i), } if err := db.Update(func(tx *bolt.Tx) error { return packager.AckSettleFails(tx, failSettleRef) }); err != nil { t.Fatalf("unable to remove settle/fail htlc: %v", err) } } // Now simulate this channel receiving a fail/settle for the adds in the // fwdpkg. for i := range adds { // Again, we should still have one package on disk and be in // FwdStateProcessed. This should not change until all of the // add htlcs have been acked. fwdPkgs = loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 1 { t.Fatalf("expected 1 fwdpkg, instead found %d", len(fwdPkgs)) } assertFwdPkgState(t, fwdPkgs[0], channeldb.FwdStateProcessed) assertFwdPkgNumAddsSettleFails(t, fwdPkgs[0], nAdds, nSettleFails) assertSettleFailFilterIsFull(t, fwdPkgs[0], true) assertAckFilterIsFull(t, fwdPkgs[0], false) addRef := channeldb.AddRef{ Height: fwdPkg.Height, Index: uint16(i), } if err := db.Update(func(tx *bolt.Tx) error { return packager.AckAddHtlcs(tx, addRef) }); err != nil { t.Fatalf("unable to ack add htlc: %v", err) } } // We should still have one package on disk. Now that all settles and // fails have been removed, package should be FwdStateCompleted since // there are no other add packets. fwdPkgs = loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 1 { t.Fatalf("expected 1 fwdpkg, instead found %d", len(fwdPkgs)) } assertFwdPkgState(t, fwdPkgs[0], channeldb.FwdStateCompleted) assertFwdPkgNumAddsSettleFails(t, fwdPkgs[0], nAdds, nSettleFails) assertSettleFailFilterIsFull(t, fwdPkgs[0], true) assertAckFilterIsFull(t, fwdPkgs[0], true) // Lastly, remove the completed forwarding package from disk. if err := db.Update(func(tx *bolt.Tx) error { return packager.RemovePkg(tx, fwdPkg.Height) }); err != nil { t.Fatalf("unable to remove fwdpkg: %v", err) } // Check that the fwd package was actually removed. fwdPkgs = loadFwdPkgs(t, db, packager) if len(fwdPkgs) != 0 { t.Fatalf("no forwarding packages should exist, found %d", len(fwdPkgs)) } } // assertFwdPkgState checks the current state of a fwdpkg meets our // expectations. func assertFwdPkgState(t *testing.T, fwdPkg *channeldb.FwdPkg, state channeldb.FwdState) { _, _, line, _ := runtime.Caller(1) if fwdPkg.State != state { t.Fatalf("line %d: expected fwdpkg in state %v, found %v", line, state, fwdPkg.State) } } // assertFwdPkgNumAddsSettleFails checks that the number of adds and // settle/fail log updates are correct. func assertFwdPkgNumAddsSettleFails(t *testing.T, fwdPkg *channeldb.FwdPkg, expectedNumAdds, expectedNumSettleFails int) { _, _, line, _ := runtime.Caller(1) if len(fwdPkg.Adds) != expectedNumAdds { t.Fatalf("line %d: expected fwdpkg to have %d adds, found %d", line, expectedNumAdds, len(fwdPkg.Adds)) } if len(fwdPkg.SettleFails) != expectedNumSettleFails { t.Fatalf("line %d: expected fwdpkg to have %d settle/fails, found %d", line, expectedNumSettleFails, len(fwdPkg.SettleFails)) } } // assertAckFilterIsFull checks whether or not a fwdpkg's ack filter matches our // expected full-ness. func assertAckFilterIsFull(t *testing.T, fwdPkg *channeldb.FwdPkg, expected bool) { _, _, line, _ := runtime.Caller(1) if fwdPkg.AckFilter.IsFull() != expected { t.Fatalf("line %d: expected fwdpkg ack filter IsFull to be %v, "+ "found %v", line, expected, fwdPkg.AckFilter.IsFull()) } } // assertSettleFailFilterIsFull checks whether or not a fwdpkg's settle fail // filter matches our expected full-ness. func assertSettleFailFilterIsFull(t *testing.T, fwdPkg *channeldb.FwdPkg, expected bool) { _, _, line, _ := runtime.Caller(1) if fwdPkg.SettleFailFilter.IsFull() != expected { t.Fatalf("line %d: expected fwdpkg settle/fail filter IsFull to be %v, "+ "found %v", line, expected, fwdPkg.SettleFailFilter.IsFull()) } } // loadFwdPkgs is a helper method that reads all forwarding packages for a // particular packager. func loadFwdPkgs(t *testing.T, db *bolt.DB, packager channeldb.FwdPackager) []*channeldb.FwdPkg { var fwdPkgs []*channeldb.FwdPkg if err := db.View(func(tx *bolt.Tx) error { var err error fwdPkgs, err = packager.LoadFwdPkgs(tx) return err }); err != nil { t.Fatalf("unable to load fwd pkgs: %v", err) } return fwdPkgs } // makeFwdPkgDB initializes a test database for forwarding packages. If the // provided path is an empty, it will create a temp dir/file to use. func makeFwdPkgDB(t *testing.T, path string) *bolt.DB { if path == "" { var err error path, err = ioutil.TempDir("", "fwdpkgdb") if err != nil { t.Fatalf("unable to create temp path: %v", err) } path = filepath.Join(path, "fwdpkg.db") } db, err := bolt.Open(path, 0600, nil) if err != nil { t.Fatalf("unable to open boltdb: %v", err) } return db }