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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| // Copyright 2024 The Accumulate Authors | ||
| // | ||
| // Use of this source code is governed by an MIT-style | ||
| // license that can be found in the LICENSE file or at | ||
| // https://opensource.org/licenses/MIT. | ||
|
|
||
| package overlay | ||
|
|
||
| import ( | ||
| "gitlab.com/accumulatenetwork/accumulate/pkg/database" | ||
| "gitlab.com/accumulatenetwork/accumulate/pkg/database/keyvalue" | ||
| "gitlab.com/accumulatenetwork/accumulate/pkg/database/keyvalue/memory" | ||
| "gitlab.com/accumulatenetwork/accumulate/pkg/errors" | ||
| "gitlab.com/accumulatenetwork/accumulate/pkg/types/record" | ||
| ) | ||
|
|
||
| func Open(a, b keyvalue.Beginner) keyvalue.Beginner { | ||
| return &Database{a, b} | ||
| } | ||
|
|
||
| type Database struct { | ||
| a, b keyvalue.Beginner | ||
| } | ||
|
|
||
| func (d *Database) Begin(prefix *database.Key, writable bool) keyvalue.ChangeSet { | ||
| a := d.a.Begin(prefix, writable) | ||
| b := d.b.Begin(prefix, false) | ||
|
|
||
| return memory.NewChangeSet(memory.ChangeSetOptions{ | ||
| Get: func(key *record.Key) ([]byte, error) { return get(a, b, key) }, | ||
| ForEach: func(fn func(*record.Key, []byte) error) error { return forEach(a, b, fn) }, | ||
| Discard: func() { a.Discard(); b.Discard() }, | ||
| Commit: func(m map[[32]byte]memory.Entry) error { return commit(a, b, m) }, | ||
| }) | ||
| } | ||
|
|
||
| func get(a, b keyvalue.ChangeSet, key *record.Key) ([]byte, error) { | ||
| // Get from a | ||
| v, err := a.Get(key) | ||
| switch { | ||
| case err == nil: | ||
| return v, nil | ||
| case !errors.Is(err, errors.NotFound): | ||
| return nil, err | ||
| } | ||
|
|
||
| // Get from b | ||
| v, err = b.Get(key) | ||
| switch { | ||
| case err == nil: | ||
| return v, nil | ||
| case !errors.Is(err, errors.NotFound): | ||
| return nil, err | ||
| } | ||
|
|
||
| return nil, (*database.NotFoundError)(key) | ||
| } | ||
|
|
||
| func forEach(a, b keyvalue.ChangeSet, fn func(*record.Key, []byte) error) error { | ||
| seen := map[[32]byte]bool{} | ||
|
|
||
| err := a.ForEach(func(key *record.Key, value []byte) error { | ||
| seen[key.Hash()] = true | ||
| return fn(key, value) | ||
| }) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return b.ForEach(func(key *record.Key, value []byte) error { | ||
| if seen[key.Hash()] { | ||
| return nil | ||
| } | ||
| return fn(key, value) | ||
| }) | ||
| } | ||
|
|
||
| func commit(a, b keyvalue.ChangeSet, m map[[32]byte]memory.Entry) error { | ||
| for _, entry := range m { | ||
| if !entry.Delete { | ||
| err := a.Put(entry.Key, entry.Value) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| continue | ||
| } | ||
|
|
||
| _, err := b.Get(entry.Key) | ||
| switch { | ||
| case err == nil: | ||
| return errors.NotAllowed.WithFormat("cannot delete %v: it is present in the underlying database", entry.Key) | ||
| case !errors.Is(err, errors.NotFound): | ||
| return err | ||
| } | ||
|
|
||
| err = a.Delete(entry.Key) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| } | ||
| return a.Commit() | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| // Copyright 2024 The Accumulate Authors | ||
| // | ||
| // Use of this source code is governed by an MIT-style | ||
| // license that can be found in the LICENSE file or at | ||
| // https://opensource.org/licenses/MIT. | ||
|
|
||
| package overlay | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
||
| "gitlab.com/accumulatenetwork/accumulate/pkg/database/keyvalue" | ||
| "gitlab.com/accumulatenetwork/accumulate/pkg/database/keyvalue/kvtest" | ||
| "gitlab.com/accumulatenetwork/accumulate/pkg/database/keyvalue/memory" | ||
| ) | ||
|
|
||
| func open(*testing.T) kvtest.Opener { | ||
| db := Open(memory.New(nil), memory.New(nil)) | ||
| return func() (keyvalue.Beginner, error) { | ||
| return db, nil | ||
| } | ||
| } | ||
|
|
||
| func TestDatabase(t *testing.T) { | ||
| kvtest.TestDatabase(t, open(t)) | ||
| } | ||
|
|
||
| func TestIsolation(t *testing.T) { | ||
| t.Skip("Not supported by the underlying databases") | ||
| kvtest.TestIsolation(t, open(t)) | ||
| } | ||
|
|
||
| func TestSubBatch(t *testing.T) { | ||
| kvtest.TestSubBatch(t, open(t)) | ||
| } | ||
|
|
||
| func TestPrefix(t *testing.T) { | ||
| kvtest.TestPrefix(t, open(t)) | ||
| } | ||
|
|
||
| func TestDelete(t *testing.T) { | ||
| kvtest.TestDelete(t, open(t)) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| // Copyright 2024 The Accumulate Authors | ||
| // | ||
| // Use of this source code is governed by an MIT-style | ||
| // license that can be found in the LICENSE file or at | ||
| // https://opensource.org/licenses/MIT. | ||
|
|
||
| package overlay_test | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
||
| "github.com/stretchr/testify/require" | ||
| "gitlab.com/accumulatenetwork/accumulate/pkg/build" | ||
| "gitlab.com/accumulatenetwork/accumulate/pkg/errors" | ||
| . "gitlab.com/accumulatenetwork/accumulate/protocol" | ||
| . "gitlab.com/accumulatenetwork/accumulate/test/harness" | ||
| "gitlab.com/accumulatenetwork/accumulate/test/simulator" | ||
| ) | ||
|
|
||
| func TestOverlay(t *testing.T) { | ||
| // Setup | ||
| alice := build. | ||
| Identity("alice").Create("book"). | ||
| Tokens("tokens").Create("ACME").Add(1e9).Identity(). | ||
| Book("book").Page(1).Create().AddCredits(1e9).Book().Identity() | ||
| aliceKey := alice.Book("book").Page(1). | ||
| GenerateKey(SignatureTypeED25519) | ||
|
|
||
| badger := simulator.BadgerDbOpener(t.TempDir(), func(err error) { require.NoError(t, err) }) | ||
| simOpts := []simulator.Option{ | ||
| simulator.SimpleNetwork(t.Name(), 1, 1), | ||
| simulator.Genesis(GenesisTime).With(alice).WithVersion(ExecutorVersionV2Vandenberg), | ||
| } | ||
|
|
||
| // Execute a transaction with the original database (timestamp = 1) | ||
| sim := NewSim(t, append(simOpts, | ||
| simulator.WithDatabase(badger), | ||
| )...) | ||
|
|
||
| st := sim.BuildAndSubmitTxnSuccessfully( | ||
| build.Transaction().For(alice, "book", "1"). | ||
| BurnCredits(1). | ||
| SignWith(alice, "book", "1").Version(1).Timestamp(1).PrivateKey(aliceKey)) | ||
| sim.StepUntil( | ||
| Txn(st.TxID).Completes()) | ||
|
|
||
| // Execute a transaction in an overlay (timestamp = 2) | ||
| sim = NewSim(t, append(simOpts, | ||
| simulator.OverlayDatabase(simulator.MemoryDbOpener, badger), | ||
| )...) | ||
|
|
||
| st = sim.BuildAndSubmitTxnSuccessfully( | ||
| build.Transaction().For(alice, "book", "1"). | ||
| BurnCredits(1). | ||
| SignWith(alice, "book", "1").Version(1).Timestamp(2).PrivateKey(aliceKey)) | ||
| sim.StepUntil( | ||
| Txn(st.TxID).Completes()) | ||
|
|
||
| // Verify that the same timestamp fails | ||
| st = sim.BuildAndSubmit( | ||
| build.Transaction().For(alice, "book", "1"). | ||
| BurnCredits(1). | ||
| SignWith(alice, "book", "1").Version(1).Timestamp(2).PrivateKey(aliceKey))[1] | ||
| require.ErrorIs(t, st.AsError(), errors.BadTimestamp) | ||
|
|
||
| // Executing the transaction with the same timestamp in another overlay succeeds | ||
| sim = NewSim(t, append(simOpts, | ||
| simulator.OverlayDatabase(simulator.MemoryDbOpener, badger), | ||
| )...) | ||
|
|
||
| st = sim.BuildAndSubmitTxnSuccessfully( | ||
| build.Transaction().For(alice, "book", "1"). | ||
| BurnCredits(1). | ||
| SignWith(alice, "book", "1").Version(1).Timestamp(2).PrivateKey(aliceKey)) | ||
| sim.StepUntil( | ||
| Txn(st.TxID).Completes()) | ||
| } |
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