diff --git a/Makefile b/Makefile index c6c4fc9..a458f89 100644 --- a/Makefile +++ b/Makefile @@ -42,6 +42,10 @@ test_all: ## runs the test suite test_badger: ## runs the badger KVStore submodule's test suite go test -v -p 1 -count=1 ./kvstore/badger/... -mod=readonly -race +.PHONY: test_pebble +test_pebble: ## runs the pebble KVStore submodule's test suite + go test -v -p 1 -count=1 ./kvstore/pebble/... -mod=readonly -race + ##################### ### go helpers ### @@ -93,6 +97,10 @@ benchmark_smst_ops: ## runs the benchmarks test different operations on the SMS benchmark_proof_sizes: ## runs the benchmarks test the proof sizes for different sized tries go test -tags=benchmark -v ./benchmarks -run ProofSizes +.PHONY: benchmark_pebble +benchmark_pebble: ## TODO: Add the pebble benchmarks + echo "TODO: Implement pebble benchmarks" + ########################### ### Release Helpers ### ########################### @@ -120,4 +128,4 @@ tag_minor_release: ## Tag a new minor release (e.g. v1.0.0 -> v1.1.0) @echo "New minor release version tagged: $(NEW_TAG)" @echo "Run the following commands to push the new tag:" @echo " git push origin $(NEW_TAG)" - @echo "And draft a new release at https://github.com/pokt-network/smt/releases/new" \ No newline at end of file + @echo "And draft a new release at https://github.com/pokt-network/smt/releases/new" diff --git a/go.work b/go.work index a3758d3..8a6aa99 100644 --- a/go.work +++ b/go.work @@ -1,8 +1,10 @@ go 1.20 use ( - // Include the main SMT module - . - // Include the badger KVStore submodule - ./kvstore/badger + // Include the main SMT module + . + // Include the badger KVStore submodule + ./kvstore/badger + // Include the pebble KVStore submodule + ./kvstore/pebble ) diff --git a/go.work.sum b/go.work.sum index e86ddc5..80f068f 100644 --- a/go.work.sum +++ b/go.work.sum @@ -1,43 +1,111 @@ cloud.google.com/go v0.26.0 h1:e0WKqKTd5BnrG8aKH3J3h+QvEIQtSUcf2n5UZ5ZgLtQ= github.com/BurntSushi/toml v0.3.1 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v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE= google.golang.org/appengine v1.4.0 h1:/wp5JvzpHIxhs/dumFmF7BXTf3Z+dd4uXta4kVyO508= google.golang.org/genproto v0.0.0-20230110181048-76db0878b65f h1:BWUVssLB0HVOSY78gIdvk1dTVYtT1y8SBWtPYuTJ/6w= google.golang.org/genproto v0.0.0-20230110181048-76db0878b65f/go.mod h1:RGgjbofJ8xD9Sq1VVhDM1Vok1vRONV+rg+CjzG4SZKM= +google.golang.org/genproto v0.0.0-20230410155749-daa745c078e1/go.mod h1:nKE/iIaLqn2bQwXBg8f1g2Ylh6r5MN5CmZvuzZCgsCU= google.golang.org/grpc v1.53.0 h1:LAv2ds7cmFV/XTS3XG1NneeENYrXGmorPxsBbptIjNc= google.golang.org/grpc v1.53.0/go.mod h1:OnIrk0ipVdj4N5d9IUoFUx72/VlD7+jUsHwZgwSMQpw= +google.golang.org/grpc v1.56.3/go.mod h1:I9bI3vqKfayGqPUAwGdOSu7kt6oIJLixfffKrpXqQ9s= +gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q= +gopkg.in/ini.v1 v1.67.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k= gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10= gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099 h1:XJP7lxbSxWLOMNdBE4B/STaqVy6L73o0knwj2vIlxnw= diff --git a/kvstore/badger/errors.go b/kvstore/badger/errors.go index 6bdb083..bdf63fb 100644 --- a/kvstore/badger/errors.go +++ b/kvstore/badger/errors.go @@ -35,4 +35,7 @@ var ( // ErrBadgerGettingStoreLength is returned when the badger store fails to // get the length of the database ErrBadgerGettingStoreLength = errors.New("unable to get database length") + // ErrBadgerUnableToCheckExistence is returned when the badger store fails to + // check if a key exists + ErrBadgerUnableToCheckExistence = errors.New("unable to check key existence") ) diff --git a/kvstore/badger/interface.go b/kvstore/badger/interface.go index 5691868..1b8e710 100644 --- a/kvstore/badger/interface.go +++ b/kvstore/badger/interface.go @@ -14,14 +14,7 @@ var _ kvstore.MapStore = (BadgerKVStore)(nil) // This is a superset of the MapStore interface that offers more // features and can be used as a standalone key-value store. type BadgerKVStore interface { - // --- Store methods --- - - // Get returns the value for a given key - Get(key []byte) ([]byte, error) - // Set sets/updates the value for a given key - Set(key, value []byte) error - // Delete removes a key - Delete(key []byte) error + kvstore.MapStore // --- Lifecycle methods --- @@ -41,11 +34,4 @@ type BadgerKVStore interface { GetAll(prefixKey []byte, descending bool) (keys, values [][]byte, err error) // Exists returns true if the key exists Exists(key []byte) (bool, error) - // Len returns the number of key-value pairs in the store - Len() int - - // --- Data management --- - - // ClearAll deletes all key-value pairs in the store - ClearAll() error } diff --git a/kvstore/badger/kvstore.go b/kvstore/badger/kvstore.go index 07e2caf..686ef0d 100644 --- a/kvstore/badger/kvstore.go +++ b/kvstore/badger/kvstore.go @@ -20,6 +20,8 @@ type badgerKVStore struct { // NewKVStore creates a new BadgerKVStore using badger as the underlying database // if no path for a persistence database is provided it will create one in-memory +// TODO_CONSIDERATION: consider exposing the low-level options (`badgerv4.Options`) via a +// config file to make it easier to test under different load conditions. func NewKVStore(path string) (BadgerKVStore, error) { var db *badgerv4.DB var err error @@ -31,6 +33,7 @@ func NewKVStore(path string) (BadgerKVStore, error) { if err != nil { return nil, errors.Join(ErrBadgerOpeningStore, err) } + return &badgerKVStore{db: db}, nil } @@ -109,13 +112,26 @@ func (store *badgerKVStore) GetAll(prefix []byte, descending bool) (keys, values return keys, values, nil } -// Exists checks whether the key exists in the store +// Exists checks whether the key exists in the store without retrieving the full value. +// This avoids unnecessary memory allocations and copying that would occur with a full Get. func (store *badgerKVStore) Exists(key []byte) (bool, error) { - val, err := store.Get(key) + var exists bool + err := store.db.View(func(tx *badgerv4.Txn) error { + item, err := tx.Get(key) + if err != nil { + return err + } + // Check if the value is nil + err = item.Value(func(val []byte) error { + exists = len(val) > 0 + return nil + }) + return err + }) if err != nil { - return false, err + return false, errors.Join(ErrBadgerUnableToCheckExistence, err) } - return val != nil, nil + return exists, nil } // ClearAll deletes all key-value pairs in the store @@ -159,9 +175,9 @@ func (store *badgerKVStore) Stop() error { } // Len gives the number of keys in the store -func (store *badgerKVStore) Len() int { - count := 0 - if err := store.db.View(func(tx *badgerv4.Txn) error { +func (store *badgerKVStore) Len() (int, error) { + var count int + err := store.db.View(func(tx *badgerv4.Txn) error { opt := badgerv4.DefaultIteratorOptions opt.Prefix = []byte{} opt.Reverse = false @@ -171,14 +187,22 @@ func (store *badgerKVStore) Len() int { count++ } return nil - }); err != nil { - panic(errors.Join(ErrBadgerGettingStoreLength, err)) + }) + if err != nil { + return 0, errors.Join(ErrBadgerGettingStoreLength, err) } - return count + return count, nil } -// PrefixEndBytes returns the end byteslice for a noninclusive range -// that would include all byte slices for which the input is the prefix +// prefixEndBytes returns the end byteslice for a noninclusive range +// that would include all byte slices for which the input is the prefix. +// It's used in reverse iteration to set the upper bound of the key range. +// +// Example: +// If prefix is []byte("user:1"), prefixEndBytes returns []byte("user:2"). +// This ensures that in reverse iteration: +// - Keys like "user:1", "user:1:profile", "user:10" are included. +// - But "user:2", "user:2:profile" are not included. func prefixEndBytes(prefix []byte) []byte { if len(prefix) == 0 { return nil @@ -194,7 +218,16 @@ func prefixEndBytes(prefix []byte) []byte { // badgerOptions returns the badger options for the store being created func badgerOptions(path string) badgerv4.Options { + // DEV_NOTE: Parameters should be adjusted carefully, depending on the type of load. We need to experiment more to find the best + // values, and even then they might need further adjustments as the type of load/environment (e.g. memory dedicated + // to the process) changes. + // + // Good links to read about options: + // - https://github.com/dgraph-io/badger/issues/1304#issuecomment-630078745 + // - https://github.com/dgraph-io/badger/blob/master/options.go#L37 + // - https://github.com/open-policy-agent/opa/issues/4014#issuecomment-1003700744 opts := badgerv4.DefaultOptions(path) opts.Logger = nil // disable badger's logger since it's very noisy + return opts } diff --git a/kvstore/badger/kvstore_test.go b/kvstore/badger/kvstore_test.go index 5579241..5941410 100644 --- a/kvstore/badger/kvstore_test.go +++ b/kvstore/badger/kvstore_test.go @@ -7,6 +7,7 @@ import ( "github.com/stretchr/testify/require" + badgerv4 "github.com/dgraph-io/badger/v4" "github.com/pokt-network/smt/kvstore/badger" ) @@ -280,7 +281,7 @@ func TestBadger_KVStore_Exists(t *testing.T) { // Key does not exist exists, err = store.Exists([]byte("oof")) - require.ErrorIs(t, err, badger.ErrBadgerUnableToGetValue) + require.ErrorIs(t, err, badgerv4.ErrKeyNotFound) require.False(t, exists) err = store.Stop() @@ -389,7 +390,9 @@ func TestBadger_KVStore_Len(t *testing.T) { for _, tc := range tests { require.NoError(t, store.Set(tc.key, tc.value)) - require.Equal(t, tc.size, store.Len()) + len, err := store.Len() + require.NoError(t, err) + require.Equal(t, tc.size, len) } } diff --git a/kvstore/interfaces.go b/kvstore/interfaces.go index e0c92a4..609c136 100644 --- a/kvstore/interfaces.go +++ b/kvstore/interfaces.go @@ -13,7 +13,7 @@ type MapStore interface { // Delete removes a key Delete(key []byte) error // Len returns the number of key-value pairs in the store - Len() int + Len() (int, error) // --- Debug --- diff --git a/kvstore/pebble/errors.go b/kvstore/pebble/errors.go new file mode 100644 index 0000000..a2f3892 --- /dev/null +++ b/kvstore/pebble/errors.go @@ -0,0 +1,36 @@ +package pebble + +import "errors" + +// Error definitions +var ( + // ErrPebbleOpeningStore is returned when there's an error opening the Pebble database. + ErrPebbleOpeningStore = errors.New("error opening the store") + + // ErrPebbleUnableToSetValue is returned when a value cannot be set in the store. + ErrPebbleUnableToSetValue = errors.New("unable to set value") + + // ErrPebbleUnableToGetValue is returned when a value cannot be retrieved from the store. + ErrPebbleUnableToGetValue = errors.New("unable to get value") + + // ErrPebbleUnableToDeleteValue is returned when a value cannot be deleted from the store. + ErrPebbleUnableToDeleteValue = errors.New("unable to delete value") + + // ErrPebbleIteratingStore is returned when there's an error iterating over the database. + ErrPebbleIteratingStore = errors.New("unable to iterate over database") + + // ErrPebbleClearingStore is returned when there's an error clearing all data from the store. + ErrPebbleClearingStore = errors.New("unable to clear store") + + // ErrPebbleUnableToBackup is returned when there's an error backing up the database. + ErrPebbleUnableToBackup = errors.New("unable to backup database") + + // ErrPebbleUnableToRestore is returned when there's an error restoring the database from a backup. + ErrPebbleUnableToRestore = errors.New("unable to restore database") + + // ErrPebbleClosingStore is returned when there's an error closing the database connection. + ErrPebbleClosingStore = errors.New("unable to close database") + + // ErrPebbleGettingStoreLength is returned when there's an error getting the number of key-value pairs in the database. + ErrPebbleGettingStoreLength = errors.New("unable to get database length") +) diff --git a/kvstore/pebble/go.mod b/kvstore/pebble/go.mod new file mode 100644 index 0000000..f7e3a1a --- /dev/null +++ b/kvstore/pebble/go.mod @@ -0,0 +1,44 @@ +module github.com/pokt-network/smt/kvstore/pebble + +go 1.20 + +require ( + github.com/pokt-network/smt v0.8.1 + github.com/stretchr/testify v1.9.0 +) + +require ( + github.com/DataDog/zstd v1.4.5 // indirect + github.com/beorn7/perks v1.0.1 // indirect + github.com/cespare/xxhash/v2 v2.2.0 // indirect + github.com/cockroachdb/errors v1.11.3 // indirect + github.com/cockroachdb/fifo v0.0.0-20240606204812-0bbfbd93a7ce // indirect + github.com/cockroachdb/logtags v0.0.0-20230118201751-21c54148d20b // indirect + github.com/cockroachdb/redact v1.1.5 // indirect + github.com/cockroachdb/tokenbucket v0.0.0-20230807174530-cc333fc44b06 // indirect + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/getsentry/sentry-go v0.27.0 // indirect + github.com/gogo/protobuf v1.3.2 // indirect + github.com/golang/protobuf v1.5.3 // indirect + github.com/golang/snappy v0.0.4 // indirect + github.com/klauspost/compress v1.16.0 // indirect + github.com/matttproud/golang_protobuf_extensions v1.0.2-0.20181231171920-c182affec369 // indirect + github.com/pkg/errors v0.9.1 // indirect + github.com/pmezard/go-difflib v1.0.0 // indirect + github.com/prometheus/client_golang v1.12.0 // indirect + github.com/prometheus/client_model v0.2.1-0.20210607210712-147c58e9608a // indirect + github.com/prometheus/common v0.32.1 // indirect + github.com/prometheus/procfs v0.7.3 // indirect + github.com/rogpeppe/go-internal v1.9.0 // indirect + golang.org/x/exp v0.0.0-20230626212559-97b1e661b5df // indirect + golang.org/x/sys v0.18.0 // indirect + golang.org/x/text v0.14.0 // indirect + google.golang.org/protobuf v1.33.0 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect +) + +require ( + github.com/cockroachdb/pebble v1.1.2 + github.com/kr/pretty v0.3.1 // indirect + github.com/kr/text v0.2.0 // indirect +) diff --git a/kvstore/pebble/go.sum b/kvstore/pebble/go.sum new file mode 100644 index 0000000..865ea85 --- /dev/null +++ b/kvstore/pebble/go.sum @@ -0,0 +1,523 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU= +cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU= +cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY= +cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc= +cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0= +cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To= +cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4= +cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M= +cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc= +cloud.google.com/go v0.56.0/go.mod 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+rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0= +rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA= diff --git a/kvstore/pebble/godoc.go b/kvstore/pebble/godoc.go new file mode 100644 index 0000000..d9a54c0 --- /dev/null +++ b/kvstore/pebble/godoc.go @@ -0,0 +1,4 @@ +// Package pebble is a wrapper around the Pebble key-value store for use in the +// SM(S)T implementation and as a general purpose key-value store for both +// in-memory and persistent use cases. +package pebble diff --git a/kvstore/pebble/interface.go b/kvstore/pebble/interface.go new file mode 100644 index 0000000..29897fa --- /dev/null +++ b/kvstore/pebble/interface.go @@ -0,0 +1,22 @@ +package pebble + +import ( + "github.com/pokt-network/smt/kvstore" +) + +// Ensure the PebbleKVStore can be used as an SMT node store +var _ kvstore.MapStore = (PebbleKVStore)(nil) + +// PebbleKVStore is an interface that defines a key-value store +// that can be used standalone or as the node store for an SMT. +// This is a superset of the MapStore interface that offers more +// features and can be used as a standalone key-value store. +type PebbleKVStore interface { + kvstore.MapStore + + // --- Lifecycle methods --- + Stop() error + // --- Accessors --- + GetAll(prefixKey []byte, descending bool) (keys, values [][]byte, err error) + Exists(key []byte) (bool, error) +} diff --git a/kvstore/pebble/kvstore.go b/kvstore/pebble/kvstore.go new file mode 100644 index 0000000..2b9dd47 --- /dev/null +++ b/kvstore/pebble/kvstore.go @@ -0,0 +1,178 @@ +package pebble + +import ( + "errors" + + "github.com/cockroachdb/pebble" + "github.com/cockroachdb/pebble/vfs" +) + +var _ PebbleKVStore = &pebbleKVStore{} + +type pebbleKVStore struct { + db *pebble.DB +} + +// NewKVStore creates a new PebbleKVStore instance. +// If path is empty, it creates an in-memory store. +// TODO_CONSIDERATION: consider exposing the low-level options (`pebble.Options{}`) +// via a config file to make it easier to test under different load conditions. +func NewKVStore(path string) (PebbleKVStore, error) { + store := &pebbleKVStore{} + + opts := &pebble.Options{} + if path == "" { + opts.FS = vfs.NewMem() + } + + db, err := pebble.Open(path, opts) + if err != nil { + return nil, errors.Join(ErrPebbleOpeningStore, err) + } + store.db = db + return store, nil +} + +// Set stores a key-value pair in the database. +func (store *pebbleKVStore) Set(key, value []byte) error { + if key == nil { + return ErrPebbleUnableToSetValue + } + err := store.db.Set(key, value, pebble.Sync) + if err != nil { + return errors.Join(ErrPebbleUnableToSetValue, err) + } + return nil +} + +// Get retrieves the value associated with the given key. +func (store *pebbleKVStore) Get(key []byte) ([]byte, error) { + if key == nil { + return nil, ErrPebbleUnableToGetValue + } + value, closer, err := store.db.Get(key) + if err != nil { + if err == pebble.ErrNotFound { + return nil, ErrPebbleUnableToGetValue + } + return nil, errors.Join(ErrPebbleUnableToGetValue, err) + } + defer closer.Close() + return append([]byte{}, value...), nil +} + +// Delete removes the key-value pair associated with the given key. +func (store *pebbleKVStore) Delete(key []byte) error { + if key == nil { + return ErrPebbleUnableToDeleteValue + } + err := store.db.Delete(key, pebble.Sync) + if err != nil { + return errors.Join(ErrPebbleUnableToDeleteValue, err) + } + return nil +} + +// GetAll retrieves all key-value pairs with keys starting with the given prefix. +// If descending is true, it returns the results in reverse lexicographical order. +func (store *pebbleKVStore) GetAll(prefix []byte, descending bool) (keys, values [][]byte, err error) { + iter, _ := store.db.NewIter(&pebble.IterOptions{ + LowerBound: prefix, + UpperBound: prefixEndBytes(prefix), + }) + defer iter.Close() + + if descending { + for valid := iter.Last(); valid; valid = iter.Prev() { + keys = append(keys, append([]byte{}, iter.Key()...)) + values = append(values, append([]byte{}, iter.Value()...)) + } + } else { + for iter.First(); iter.Valid(); iter.Next() { + keys = append(keys, append([]byte{}, iter.Key()...)) + values = append(values, append([]byte{}, iter.Value()...)) + } + } + + if err := iter.Error(); err != nil { + return nil, nil, errors.Join(ErrPebbleIteratingStore, err) + } + + return keys, values, nil +} + +// Exists checks if a key exists in the store and has a non-empty value. +func (store *pebbleKVStore) Exists(key []byte) (bool, error) { + value, closer, err := store.db.Get(key) + if err == pebble.ErrNotFound { + return false, nil + } + if err != nil { + return false, errors.Join(ErrPebbleUnableToGetValue, err) + } + defer closer.Close() + return len(value) > 0, nil +} + +// ClearAll removes all key-value pairs from the store. +// DEV_NOTE: currently not used in production code, but consider optimizing with `Batch.DeleteRange` if that changes. +func (store *pebbleKVStore) ClearAll() error { + iter, _ := store.db.NewIter(nil) + defer iter.Close() + for iter.First(); iter.Valid(); iter.Next() { + if err := store.db.Delete(iter.Key(), pebble.Sync); err != nil { + return errors.Join(ErrPebbleClearingStore, err) + } + } + if err := iter.Error(); err != nil { + return errors.Join(ErrPebbleClearingStore, err) + } + return nil +} + +// Stop closes the database connection. +func (store *pebbleKVStore) Stop() error { + return store.db.Close() +} + +// Len returns the number of key-value pairs in the store. +func (store *pebbleKVStore) Len() (int, error) { + count := 0 + iter, _ := store.db.NewIter(nil) + defer iter.Close() + for iter.First(); iter.Valid(); iter.Next() { + count++ + } + if err := iter.Error(); err != nil { + return 0, errors.Join(ErrPebbleGettingStoreLength, err) + } + return count, nil +} + +// prefixEndBytes returns the end byte slice for a noninclusive range +// that would include all byte slices for which the input is the prefix. +// It's used in reverse iteration to set the upper bound of the key range. +// +// Example: +// If prefix is []byte("user:1"), prefixEndBytes returns []byte("user:2"). +// This ensures that in reverse iteration: +// - Keys like "user:1", "user:1:profile", "user:10" are included. +// - But "user:2", "user:2:profile" are not included. +// +// See `TestPebble_KVStore_GetAllWithPrefixEnd` for more examples. +// +// Note: This function assumes the prefix is composed of standard ASCII characters. +func prefixEndBytes(prefix []byte) []byte { + if len(prefix) == 0 { + return nil + } + end := make([]byte, len(prefix)) + copy(end, prefix) + for i := len(end) - 1; i >= 0; i-- { + end[i]++ + if end[i] != 0 { + return end[:i+1] + } + } + return nil // when all bytes are 0xff +} diff --git a/kvstore/pebble/kvstore_test.go b/kvstore/pebble/kvstore_test.go new file mode 100644 index 0000000..79af559 --- /dev/null +++ b/kvstore/pebble/kvstore_test.go @@ -0,0 +1,424 @@ +package pebble_test + +import ( + "strings" + "testing" + + "github.com/stretchr/testify/require" + + "github.com/pokt-network/smt/kvstore/pebble" +) + +func TestPebble_KVStore_BasicOperations(t *testing.T) { + store, err := pebble.NewKVStore("") + require.NoError(t, err) + require.NotNil(t, store) + + testCases := []struct { + desc string + op string + key []byte + value []byte + fail bool + expectedErr error + }{ + { + desc: "Successfully sets a value in the store", + op: "set", + key: []byte("testKey"), + value: []byte("testValue"), + fail: false, + expectedErr: nil, + }, + { + desc: "Successfully updates a value in the store", + op: "set", + key: []byte("foo"), + value: []byte("new value"), + fail: false, + expectedErr: nil, + }, + { + desc: "Fails to set value to nil key", + op: "set", + key: nil, + value: []byte("bar"), + fail: true, + expectedErr: pebble.ErrPebbleUnableToSetValue, + }, + { + desc: "Successfully retrieve a value from the store", + op: "get", + key: []byte("foo"), + value: []byte("bar"), + fail: false, + expectedErr: nil, + }, + { + desc: "Fails to get a value that is not stored", + op: "get", + key: []byte("bar"), + value: nil, + fail: true, + expectedErr: pebble.ErrPebbleUnableToGetValue, + }, + { + desc: "Fails when the key is empty", + op: "get", + key: nil, + value: nil, + fail: true, + expectedErr: pebble.ErrPebbleUnableToGetValue, + }, + { + desc: "Successfully deletes a value in the store", + op: "delete", + key: []byte("foo"), + value: nil, + fail: false, + expectedErr: nil, + }, + { + desc: "Fails to delete a value not in the store", + op: "delete", + key: []byte("bar"), + value: nil, + fail: false, + expectedErr: nil, + }, + { + desc: "Fails to delete a nil key", + op: "delete", + key: nil, + value: nil, + fail: true, + expectedErr: pebble.ErrPebbleUnableToDeleteValue, + }, + } + + for _, tc := range testCases { + t.Run(tc.desc, func(t *testing.T) { + err := store.ClearAll() + require.NoError(t, err) + setupStore(t, store) + switch tc.op { + case "set": + err := store.Set(tc.key, tc.value) + if tc.fail { + require.Error(t, err) + require.ErrorIs(t, err, tc.expectedErr) + } else { + require.NoError(t, err) + got, err := store.Get(tc.key) + require.NoError(t, err) + require.Equal(t, tc.value, got) + } + case "get": + got, err := store.Get(tc.key) + if tc.fail { + require.Error(t, err) + require.ErrorIs(t, err, tc.expectedErr) + } else { + require.NoError(t, err) + require.Equal(t, tc.value, got) + } + case "delete": + err := store.Delete(tc.key) + if tc.fail { + require.Error(t, err) + require.ErrorIs(t, err, tc.expectedErr) + } else { + require.NoError(t, err) + _, err := store.Get(tc.key) + require.ErrorIs(t, err, pebble.ErrPebbleUnableToGetValue) + } + } + }) + } + + err = store.Stop() + require.NoError(t, err) +} + +func TestPebble_KVStore_GetAllBasic(t *testing.T) { + store, err := pebble.NewKVStore("") + require.NoError(t, err) + require.NotNil(t, store) + + keys := [][]byte{ + []byte("foo"), + []byte("bar"), + []byte("baz"), + []byte("bin"), + } + values := [][]byte{ + []byte("oof"), + []byte("rab"), + []byte("zab"), + []byte("nib"), + } + + for i := 0; i < len(keys); i++ { + err := store.Set(keys[i], values[i]) + require.NoError(t, err) + } + + allKeys, allValues, err := store.GetAll([]byte{}, false) + require.NoError(t, err) + require.Equal(t, len(keys), len(allKeys)) + require.Equal(t, len(values), len(allValues)) + + for i := 0; i < len(keys); i++ { + require.Contains(t, allKeys, keys[i]) + require.Contains(t, allValues, values[i]) + } + + err = store.Stop() + require.NoError(t, err) +} + +func TestPebble_KVStore_GetAllPrefixed(t *testing.T) { + store, err := pebble.NewKVStore("") + require.NoError(t, err) + require.NotNil(t, store) + + keys := [][]byte{ + []byte("foo"), + []byte("bar"), + []byte("baz"), + []byte("bin"), + []byte("testKey1"), + []byte("testKey2"), + []byte("testKey3"), + []byte("testKey4"), + } + values := [][]byte{ + []byte("oof"), + []byte("rab"), + []byte("zab"), + []byte("nib"), + []byte("testValue1"), + []byte("testValue2"), + []byte("testValue3"), + []byte("testValue4"), + } + + for i := 0; i < len(keys); i++ { + err := store.Set(keys[i], values[i]) + require.NoError(t, err) + } + + allKeys, allValues, err := store.GetAll([]byte("testKey"), false) + require.NoError(t, err) + require.Equal(t, 4, len(allKeys)) + require.Equal(t, 4, len(allValues)) + + for i := 0; i < len(keys); i++ { + if strings.HasPrefix(string(keys[i]), "testKey") { + require.Contains(t, allKeys, keys[i]) + require.Contains(t, allValues, values[i]) + } else { + require.NotContains(t, allKeys, keys[i]) + require.NotContains(t, allValues, values[i]) + } + } + + err = store.Stop() + require.NoError(t, err) +} + +func TestPebble_KVStore_Exists(t *testing.T) { + store, err := pebble.NewKVStore("") + require.NoError(t, err) + require.NotNil(t, store) + + keys := [][]byte{ + []byte("foo"), + []byte("bar"), + []byte("baz"), + []byte("bin"), + } + values := [][]byte{ + []byte("oof"), + nil, + []byte("zab"), + []byte("nib"), + } + + for i := 0; i < len(keys); i++ { + err := store.Set(keys[i], values[i]) + require.NoError(t, err) + } + + // Key exists in store with a value + exists, err := store.Exists([]byte("foo")) + require.NoError(t, err) + require.True(t, exists) + + // Key exists but has nil value + exists, err = store.Exists([]byte("bar")) + require.NoError(t, err) + require.False(t, exists) + + // Key does not exist + exists, err = store.Exists([]byte("oof")) + require.NoError(t, err) + require.False(t, exists) + + err = store.Stop() + require.NoError(t, err) +} + +func TestPebble_KVStore_ClearAll(t *testing.T) { + store, err := pebble.NewKVStore("") + require.NoError(t, err) + require.NotNil(t, store) + + keys := [][]byte{ + []byte("foo"), + []byte("bar"), + []byte("baz"), + []byte("bin"), + []byte("testKey1"), + []byte("testKey2"), + []byte("testKey3"), + []byte("testKey4"), + } + values := [][]byte{ + []byte("oof"), + []byte("rab"), + []byte("zab"), + []byte("nib"), + []byte("testValue1"), + []byte("testValue2"), + []byte("testValue3"), + []byte("testValue4"), + } + + for i := 0; i < len(keys); i++ { + err := store.Set(keys[i], values[i]) + require.NoError(t, err) + } + + allKeys, allValues, err := store.GetAll([]byte{}, false) + require.NoError(t, err) + require.Equal(t, len(keys), len(allKeys)) + require.Equal(t, len(values), len(allValues)) + + err = store.ClearAll() + require.NoError(t, err) + + allKeys, allValues, err = store.GetAll([]byte{}, false) + require.NoError(t, err) + require.Equal(t, 0, len(allKeys)) + require.Equal(t, 0, len(allValues)) + + err = store.Stop() + require.NoError(t, err) +} + +func TestPebble_KVStore_Len(t *testing.T) { + store, err := pebble.NewKVStore("") + require.NoError(t, err) + require.NotNil(t, store) + + tests := []struct { + key []byte + value []byte + size int + }{ + { + key: []byte("foo"), + value: []byte("bar"), + size: 1, + }, + { + key: []byte("baz"), + value: []byte("bin"), + size: 2, + }, + { + key: []byte("testKey1"), + value: []byte("testValue1"), + size: 3, + }, + } + + for _, tc := range tests { + require.NoError(t, store.Set(tc.key, tc.value)) + len, err := store.Len() + require.NoError(t, err) + require.Equal(t, tc.size, len) + } +} + +func TestPebble_KVStore_GetAllWithPrefixEnd(t *testing.T) { + store, err := pebble.NewKVStore("") + require.NoError(t, err) + require.NotNil(t, store) + + keys := [][]byte{ + []byte("user:1"), + []byte("user:10"), + []byte("user:100"), + []byte("user:2"), + []byte("user:20"), + } + values := [][]byte{ + []byte("value1"), + []byte("value10"), + []byte("value100"), + []byte("value2"), + []byte("value20"), + } + + for i := 0; i < len(keys); i++ { + err := store.Set(keys[i], values[i]) + require.NoError(t, err) + } + + t.Run("GetAll with prefix user:1", func(t *testing.T) { + expectedKeys := [][]byte{ + []byte("user:1"), + []byte("user:10"), + []byte("user:100"), + } + expectedValues := [][]byte{ + []byte("value1"), + []byte("value10"), + []byte("value100"), + } + + allKeys, allValues, err := store.GetAll([]byte("user:1"), false) + require.NoError(t, err) + require.Equal(t, expectedKeys, allKeys) + require.Equal(t, expectedValues, allValues) + }) + + t.Run("GetAll with prefix user:2", func(t *testing.T) { + expectedKeys := [][]byte{ + []byte("user:2"), + []byte("user:20"), + } + expectedValues := [][]byte{ + []byte("value2"), + []byte("value20"), + } + + allKeys, allValues, err := store.GetAll([]byte("user:2"), false) + require.NoError(t, err) + require.Equal(t, expectedKeys, allKeys) + require.Equal(t, expectedValues, allValues) + }) + + err = store.Stop() + require.NoError(t, err) +} + +func setupStore(t *testing.T, store pebble.PebbleKVStore) { + t.Helper() + err := store.Set([]byte("foo"), []byte("bar")) + require.NoError(t, err) + err = store.Set([]byte("baz"), []byte("bin")) + require.NoError(t, err) +} diff --git a/kvstore/simplemap/simplemap.go b/kvstore/simplemap/simplemap.go index c20e4bf..b03d9e9 100644 --- a/kvstore/simplemap/simplemap.go +++ b/kvstore/simplemap/simplemap.go @@ -63,8 +63,8 @@ func (sm *simpleMap) Delete(key []byte) error { } // Len returns the number of key-value pairs in the store. -func (sm *simpleMap) Len() int { - return len(sm.m) +func (sm *simpleMap) Len() (int, error) { + return len(sm.m), nil } // ClearAll clears all key-value pairs diff --git a/kvstore/simplemap/simplemap_test.go b/kvstore/simplemap/simplemap_test.go index 54437a8..5ea6beb 100644 --- a/kvstore/simplemap/simplemap_test.go +++ b/kvstore/simplemap/simplemap_test.go @@ -158,7 +158,9 @@ func TestSimpleMap_Len(t *testing.T) { for _, tt := range tests { t.Run(tt.desc, func(t *testing.T) { tt.setup(store) - require.Equal(t, tt.expectedLen, store.Len()) + len, err := store.Len() + require.NoError(t, err) + require.Equal(t, tt.expectedLen, len) }) } } @@ -172,6 +174,7 @@ func TestSimpleMap_ClearAll(t *testing.T) { // Clear all elements require.NoError(t, store.ClearAll()) - - require.Equal(t, 0, store.Len()) + len, err := store.Len() + require.NoError(t, err) + require.Equal(t, 0, len) } diff --git a/smst_test.go b/smst_test.go index 5875678..200e955 100644 --- a/smst_test.go +++ b/smst_test.go @@ -348,7 +348,9 @@ func TestSMST_OrphanRemoval(t *testing.T) { nodeCount := func(t *testing.T) int { require.NoError(t, impl.Commit()) - return smn.Len() + len, err := smn.Len() + require.NoError(t, err) + return len } setup := func() { smn = simplemap.NewSimpleMap() diff --git a/smt_test.go b/smt_test.go index cf0e48a..3490cfe 100644 --- a/smt_test.go +++ b/smt_test.go @@ -316,7 +316,9 @@ func TestSMT_OrphanRemoval(t *testing.T) { nodeCount := func(t *testing.T) int { require.NoError(t, impl.Commit()) - return smn.Len() + len, err := smn.Len() + require.NoError(t, err) + return len } setup := func() { smn = simplemap.NewSimpleMap()