diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml index e562ee96b3ab..773f70b5deff 100644 --- a/.github/workflows/test.yml +++ b/.github/workflows/test.yml @@ -492,6 +492,28 @@ jobs: with: projectBaseDir: tools/rosetta/ + test-collections: + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v3 + - uses: actions/setup-go@v3 + with: + go-version: 1.19.4 + cache: true + cache-dependency-path: collections/go.sum + - uses: technote-space/get-diff-action@v6.1.2 + id: git_diff + with: + PATTERNS: | + collections/**/*.go + collections/go.mod + collections/go.sum + - name: tests + if: env.GIT_DIFF + run: | + cd collections + go test -mod=readonly -timeout 30m -coverprofile=coverage.out -covermode=atomic -tags='norace ledger test_ledger_mock rocksdb_build' ./... + test-cosmovisor: runs-on: ubuntu-latest steps: diff --git a/collections/collections.go b/collections/collections.go new file mode 100644 index 000000000000..cd52b26ded3a --- /dev/null +++ b/collections/collections.go @@ -0,0 +1,104 @@ +package collections + +import ( + "errors" + "math" + + storetypes "github.com/cosmos/cosmos-sdk/store/types" +) + +var ( + // ErrNotFound is returned when the provided key is not present in the StorageProvider. + ErrNotFound = errors.New("collections: not found") + // ErrEncoding is returned when something fails during key or value encoding/decoding. + ErrEncoding = errors.New("collections: encoding error") +) + +// StorageProvider is implemented by types +// which provide a KVStore given a StoreKey. +// It represents sdk.Context, it exists to +// reduce dependencies. +type StorageProvider interface { + // KVStore returns a KVStore given its StoreKey. + KVStore(key storetypes.StoreKey) storetypes.KVStore +} + +// Prefix defines a segregation namespace +// for specific collections objects. +type Prefix struct { + raw []byte // TODO(testinginprod): maybe add a humanized prefix field? +} + +// Bytes returns the raw Prefix bytes. +func (n Prefix) Bytes() []byte { return n.raw } + +// NewPrefix returns a Prefix given the provided namespace identifier. +// In the same module, no prefixes should share the same starting bytes +// meaning that having two namespaces whose bytes representation is: +// p1 := []byte("prefix") +// p2 := []byte("prefix1") +// yields to iterations of p1 overlapping over p2. +// If a numeric prefix is provided, it must be between 0 and 255 (uint8). +// If out of bounds this function will panic. +// Reason for which this function is constrained to `int` instead of `uint8` is for +// API ergonomics, golang's type inference will infer int properly but not uint8 +// meaning that developers would need to write NewPrefix(uint8(number)) for numeric +// prefixes. +func NewPrefix[T interface{ int | string | []byte }](identifier T) Prefix { + i := any(identifier) + var prefix []byte + switch c := i.(type) { + case int: + if c > math.MaxUint8 || c < 0 { + panic("invalid integer prefix value: must be between 0 and 255") + } + prefix = []byte{uint8(c)} + case string: + prefix = []byte(c) + case []byte: + identifierCopy := make([]byte, len(c)) + copy(identifierCopy, c) + prefix = identifierCopy + } + return Prefix{raw: prefix} +} + +// KeyCodec defines a generic interface which is implemented +// by types that are capable of encoding and decoding collections keys. +type KeyCodec[T any] interface { + // Encode writes the key bytes into the buffer. Returns the number of + // bytes written. The implementer must expect the buffer to be at least + // of length equal to Size(K) for all encodings. + // It must also return the number of written bytes which must be + // equal to Size(K) for all encodings not involving varints. + // In case of encodings involving varints then the returned + // number of written bytes is allowed to be smaller than Size(K). + Encode(buffer []byte, key T) (int, error) + // Decode reads from the provided bytes buffer to decode + // the key T. Returns the number of bytes read, the type T + // or an error in case of decoding failure. + Decode(buffer []byte) (int, T, error) + // Size returns the buffer size need to encode key T in binary format. + // The returned value must match what is computed by Encode for all + // encodings except the ones involving varints. Varints are expected + // to return the maximum varint bytes buffer length, at the risk of + // over-estimating in order to pick the most performant path. + Size(key T) int + // Stringify returns a string representation of T. + Stringify(key T) string + // KeyType returns a string identifier for the type of the key. + KeyType() string +} + +// ValueCodec defines a generic interface which is implemented +// by types that are capable of encoding and decoding collection values. +type ValueCodec[T any] interface { + // Encode encodes the value T into binary format. + Encode(value T) ([]byte, error) + // Decode returns the type T given its binary representation. + Decode(b []byte) (T, error) + // Stringify returns a string representation of T. + Stringify(value T) string + // ValueType returns the identifier for the type. + ValueType() string +} diff --git a/collections/collections_test.go b/collections/collections_test.go new file mode 100644 index 000000000000..c02e55ced94d --- /dev/null +++ b/collections/collections_test.go @@ -0,0 +1,74 @@ +package collections + +import ( + "context" + "math" + "testing" + + "github.com/cosmos/cosmos-sdk/store/mem" + "github.com/cosmos/cosmos-sdk/store/types" + "github.com/stretchr/testify/require" +) + +var _ StorageProvider = (*mockStorageProvider)(nil) + +type mockStorageProvider struct { + context.Context + store types.KVStore +} + +func (m mockStorageProvider) KVStore(key types.StoreKey) types.KVStore { + return m.store +} + +func deps() (types.StoreKey, context.Context) { + kv := mem.NewStore() + key := types.NewKVStoreKey("test") + return key, mockStorageProvider{store: kv} +} + +// checkKeyCodec asserts the correct behaviour of a KeyCodec over the type T. +func checkKeyCodec[T any](t *testing.T, encoder KeyCodec[T], key T) { + buffer := make([]byte, encoder.Size(key)) + written, err := encoder.Encode(buffer, key) + require.NoError(t, err) + require.Equal(t, len(buffer), written) + read, decodedKey, err := encoder.Decode(buffer) + require.NoError(t, err) + require.Equal(t, len(buffer), read, "encoded key and read bytes must have same size") + require.Equal(t, key, decodedKey, "encoding and decoding produces different keys") +} + +// checkValueCodec asserts the correct behaviour of a ValueCodec over the type T. +func checkValueCodec[T any](t *testing.T, encoder ValueCodec[T], value T) { + encodedValue, err := encoder.Encode(value) + require.NoError(t, err) + decodedValue, err := encoder.Decode(encodedValue) + require.NoError(t, err) + require.Equal(t, value, decodedValue, "encoding and decoding produces different values") +} + +func TestPrefix(t *testing.T) { + t.Run("panics on invalid int", func(t *testing.T) { + require.Panics(t, func() { + NewPrefix(math.MaxUint8 + 1) + }) + }) + + t.Run("string", func(t *testing.T) { + require.Equal(t, []byte("prefix"), NewPrefix("prefix").Bytes()) + }) + + t.Run("int", func(t *testing.T) { + require.Equal(t, []byte{0x1}, NewPrefix(1).Bytes()) + }) + + t.Run("[]byte", func(t *testing.T) { + bytes := []byte("prefix") + prefix := NewPrefix(bytes) + require.Equal(t, bytes, prefix.Bytes()) + // assert if modification happen they do not propagate to prefix + bytes[0] = 0x0 + require.Equal(t, []byte("prefix"), prefix.Bytes()) + }) +} diff --git a/collections/go.mod b/collections/go.mod new file mode 100644 index 000000000000..3a2db23cd84e --- /dev/null +++ b/collections/go.mod @@ -0,0 +1,53 @@ +module cosmossdk.io/collections + +go 1.19 + +require ( + github.com/cosmos/cosmos-sdk v0.46.0-beta2.0.20221207205747-f3be41836f4d + github.com/stretchr/testify v1.8.1 +) + +require ( + cosmossdk.io/errors v1.0.0-beta.7 // indirect + github.com/btcsuite/btcd/btcec/v2 v2.3.2 // indirect + github.com/cespare/xxhash v1.1.0 // indirect + github.com/cespare/xxhash/v2 v2.1.2 // indirect + github.com/confio/ics23/go v0.9.0 // indirect + github.com/cosmos/gogoproto v1.4.3 // indirect + github.com/cosmos/gorocksdb v1.2.0 // indirect + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/decred/dcrd/dcrec/secp256k1/v4 v4.1.0 // indirect + github.com/dgraph-io/badger/v2 v2.2007.4 // indirect + github.com/dgraph-io/ristretto v0.1.1 // indirect + github.com/dgryski/go-farm v0.0.0-20200201041132-a6ae2369ad13 // indirect + github.com/dustin/go-humanize v1.0.0 // indirect + github.com/go-kit/log v0.2.1 // indirect + github.com/go-logfmt/logfmt v0.5.1 // indirect + github.com/gogo/protobuf v1.3.2 // indirect + github.com/golang/glog v1.0.0 // indirect + github.com/golang/protobuf v1.5.2 // indirect + github.com/golang/snappy v0.0.4 // indirect + github.com/google/btree v1.1.2 // indirect + github.com/jmhodges/levigo v1.0.0 // indirect + github.com/klauspost/compress v1.15.12 // indirect + github.com/petermattis/goid v0.0.0-20180202154549-b0b1615b78e5 // indirect + github.com/pkg/errors v0.9.1 // indirect + github.com/pmezard/go-difflib v1.0.0 // indirect + github.com/sasha-s/go-deadlock v0.3.1 // indirect + github.com/syndtr/goleveldb v1.0.1-0.20210819022825-2ae1ddf74ef7 // indirect + github.com/tendermint/go-amino v0.16.0 // indirect + github.com/tendermint/tendermint v0.37.0-rc2 // indirect + github.com/tendermint/tm-db v0.6.7 // indirect + go.etcd.io/bbolt v1.3.6 // indirect + golang.org/x/crypto v0.4.0 // indirect + golang.org/x/exp v0.0.0-20221019170559-20944726eadf // indirect + golang.org/x/net v0.3.0 // indirect + golang.org/x/sys v0.3.0 // indirect + golang.org/x/text v0.5.0 // indirect + google.golang.org/genproto v0.0.0-20221118155620-16455021b5e6 // indirect + google.golang.org/grpc v1.51.0 // indirect + google.golang.org/protobuf v1.28.1 // indirect + gopkg.in/yaml.v2 v2.4.0 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect + sigs.k8s.io/yaml v1.3.0 // indirect +) diff --git a/collections/go.sum b/collections/go.sum new file mode 100644 index 000000000000..ebe8606033c9 --- /dev/null +++ b/collections/go.sum @@ -0,0 +1,314 @@ +cosmossdk.io/api v0.2.5 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h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY= +gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ= +gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= +gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= +gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= +nhooyr.io/websocket v1.8.6 h1:s+C3xAMLwGmlI31Nyn/eAehUlZPwfYZu2JXM621Q5/k= +pgregory.net/rapid v0.5.3 h1:163N50IHFqr1phZens4FQOdPgfJscR7a562mjQqeo4M= +sigs.k8s.io/yaml v1.3.0 h1:a2VclLzOGrwOHDiV8EfBGhvjHvP46CtW5j6POvhYGGo= +sigs.k8s.io/yaml v1.3.0/go.mod h1:GeOyir5tyXNByN85N/dRIT9es5UQNerPYEKK56eTBm8= diff --git a/collections/item.go b/collections/item.go new file mode 100644 index 000000000000..5a6e159100d8 --- /dev/null +++ b/collections/item.go @@ -0,0 +1,47 @@ +package collections + +import ( + "context" + + storetypes "github.com/cosmos/cosmos-sdk/store/types" +) + +// NewItem instantiates a new Item instance, given the value encoder of the item V. +func NewItem[V any](sk storetypes.StoreKey, prefix Prefix, valueCodec ValueCodec[V]) Item[V] { + return (Item[V])(NewMap[noKey, V](sk, prefix, noKey{}, valueCodec)) +} + +// Item is a type declaration based on Map +// with a non-existent key. +type Item[V any] Map[noKey, V] + +// Get gets the item, if it is not set it returns an ErrNotFound error. +// If value decoding fails then an ErrEncoding is returned. +func (i Item[V]) Get(ctx context.Context) (V, error) { + return (Map[noKey, V])(i).Get(ctx, noKey{}) +} + +// Set sets the item in the store. If Value encoding fails then an ErrEncoding is returned. +func (i Item[V]) Set(ctx context.Context, value V) error { + return (Map[noKey, V])(i).Set(ctx, noKey{}, value) +} + +// Has reports whether the item exists in the store or not. +// Returns an error in case +func (i Item[V]) Has(ctx context.Context) (bool, error) { + return (Map[noKey, V])(i).Has(ctx, noKey{}) +} + +// Remove removes the item in the store. +func (i Item[V]) Remove(ctx context.Context) error { + return (Map[noKey, V])(i).Remove(ctx, noKey{}) +} + +// noKey defines a KeyCodec which decodes nothing. +type noKey struct{} + +func (noKey) Stringify(_ noKey) string { return "no_key" } +func (noKey) KeyType() string { return "no_key" } +func (noKey) Size(_ noKey) int { return 0 } +func (noKey) Encode(_ []byte, _ noKey) (int, error) { return 0, nil } +func (noKey) Decode(_ []byte) (int, noKey, error) { return 0, noKey{}, nil } diff --git a/collections/item_test.go b/collections/item_test.go new file mode 100644 index 000000000000..684136aa5de9 --- /dev/null +++ b/collections/item_test.go @@ -0,0 +1,32 @@ +package collections + +import ( + "testing" + + "github.com/stretchr/testify/require" +) + +func TestItem(t *testing.T) { + sk, ctx := deps() + item := NewItem(sk, NewPrefix("item"), Uint64Value) + // set + err := item.Set(ctx, 1000) + require.NoError(t, err) + + // get + i, err := item.Get(ctx) + require.NoError(t, err) + require.Equal(t, uint64(1000), i) + + // has + has, err := item.Has(ctx) + require.NoError(t, err) + require.True(t, has) + + // remove + err = item.Remove(ctx) + require.NoError(t, err) + has, err = item.Has(ctx) + require.NoError(t, err) + require.False(t, has) +} diff --git a/collections/keys.go b/collections/keys.go new file mode 100644 index 000000000000..5440442d5606 --- /dev/null +++ b/collections/keys.go @@ -0,0 +1,38 @@ +package collections + +import ( + "encoding/binary" + "errors" + "fmt" + "strconv" +) + +// Uint64Key can be used to encode uint64 keys. +// Encoding is big endian to retain ordering. +var Uint64Key KeyCodec[uint64] = uint64Key{} + +var errDecodeKeySize = errors.New("decode error, wrong byte key size") + +type uint64Key struct{} + +func (u uint64Key) Encode(buffer []byte, key uint64) (int, error) { + binary.BigEndian.PutUint64(buffer, key) + return 8, nil +} + +func (u uint64Key) Decode(buffer []byte) (int, uint64, error) { + if size := len(buffer); size < 8 { + return 0, 0, fmt.Errorf("%w: wanted at least 8, got: %d", errDecodeKeySize, size) + } + return 8, binary.BigEndian.Uint64(buffer), nil +} + +func (u uint64Key) Size(_ uint64) int { return 8 } + +func (u uint64Key) Stringify(key uint64) string { + return strconv.FormatUint(key, 10) +} + +func (u uint64Key) KeyType() string { + return "uint64" +} diff --git a/collections/keys_test.go b/collections/keys_test.go new file mode 100644 index 000000000000..ef1b4a594dc6 --- /dev/null +++ b/collections/keys_test.go @@ -0,0 +1,18 @@ +package collections + +import ( + "testing" + + "github.com/stretchr/testify/require" +) + +func TestUint64Key(t *testing.T) { + t.Run("bijective", func(t *testing.T) { + checkKeyCodec(t, Uint64Key, 55) + }) + + t.Run("invalid key size", func(t *testing.T) { + _, _, err := Uint64Key.Decode([]byte{0x0, 0x1}) + require.ErrorIs(t, err, errDecodeKeySize) + }) +} diff --git a/collections/map.go b/collections/map.go new file mode 100644 index 000000000000..8d9f1881e7a5 --- /dev/null +++ b/collections/map.go @@ -0,0 +1,134 @@ +package collections + +import ( + "context" + "fmt" + + storetypes "github.com/cosmos/cosmos-sdk/store/types" +) + +// NewMap returns a Map given a StoreKey, a Prefix and the relative value and key encoders. +func NewMap[K, V any]( + sk storetypes.StoreKey, prefix Prefix, + keyCodec KeyCodec[K], valueCodec ValueCodec[V], +) Map[K, V] { + return Map[K, V]{ + kc: keyCodec, + vc: valueCodec, + sk: sk, + prefix: prefix.Bytes(), + } +} + +// Map represents the basic collections object. +// It is used to map arbitrary keys to arbitrary +// objects. +type Map[K, V any] struct { + kc KeyCodec[K] + vc ValueCodec[V] + + sk storetypes.StoreKey + prefix []byte +} + +// Set maps the provided value to the provided key in the store. +// Errors with ErrEncoding if key or value encoding fails. +func (m Map[K, V]) Set(ctx context.Context, key K, value V) error { + keyBytes, err := m.encodeKey(key) + if err != nil { + return err + } + + valueBytes, err := m.vc.Encode(value) + if err != nil { + return fmt.Errorf("%w: value encode: %s", ErrEncoding, err) // TODO: use multi err wrapping in go1.20: https://github.com/golang/go/issues/53435 + } + + store, err := m.getStore(ctx) + if err != nil { + return err + } + store.Set(keyBytes, valueBytes) + return nil +} + +// Get returns the value associated with the provided key, +// errors with ErrNotFound if the key does not exist, or +// with ErrEncoding if the key or value decoding fails. +func (m Map[K, V]) Get(ctx context.Context, key K) (V, error) { + keyBytes, err := m.encodeKey(key) + if err != nil { + var v V + return v, err + } + + store, err := m.getStore(ctx) + if err != nil { + var v V + return v, err + } + valueBytes := store.Get(keyBytes) + if valueBytes == nil { + var v V + return v, fmt.Errorf("%w: key '%s' of type %s", ErrNotFound, m.kc.Stringify(key), m.vc.ValueType()) + } + + v, err := m.vc.Decode(valueBytes) + if err != nil { + var v V + return v, fmt.Errorf("%w: value decode: %s", ErrEncoding, err) // TODO: use multi err wrapping in go1.20: https://github.com/golang/go/issues/53435 + } + return v, nil +} + +// Has reports whether the key is present in storage or not. +// Errors with ErrEncoding if key encoding fails. +func (m Map[K, V]) Has(ctx context.Context, key K) (bool, error) { + bytesKey, err := m.encodeKey(key) + if err != nil { + return false, err + } + store, err := m.getStore(ctx) + if err != nil { + return false, err + } + return store.Has(bytesKey), nil +} + +// Remove removes the key from the storage. +// Errors with ErrEncoding if key encoding fails. +// If the key does not exist then this is a no-op. +func (m Map[K, V]) Remove(ctx context.Context, key K) error { + bytesKey, err := m.encodeKey(key) + if err != nil { + return err + } + store, err := m.getStore(ctx) + if err != nil { + return err + } + store.Delete(bytesKey) + return nil +} + +func (m Map[K, V]) getStore(ctx context.Context) (storetypes.KVStore, error) { + provider, ok := ctx.(StorageProvider) + if !ok { + return nil, fmt.Errorf("context is not a StorageProvider: underlying type %T", ctx) + } + return provider.KVStore(m.sk), nil +} + +func (m Map[K, V]) encodeKey(key K) ([]byte, error) { + prefixLen := len(m.prefix) + // preallocate buffer + keyBytes := make([]byte, prefixLen+m.kc.Size(key)) + // put prefix + copy(keyBytes, m.prefix) + // put key + _, err := m.kc.Encode(keyBytes[prefixLen:], key) + if err != nil { + return nil, fmt.Errorf("%w: key encode: %s", ErrEncoding, err) // TODO: use multi err wrapping in go1.20: https://github.com/golang/go/issues/53435 + } + return keyBytes, nil +} diff --git a/collections/map_test.go b/collections/map_test.go new file mode 100644 index 000000000000..4665fa94381e --- /dev/null +++ b/collections/map_test.go @@ -0,0 +1,48 @@ +package collections + +import ( + "testing" + + storetypes "github.com/cosmos/cosmos-sdk/store/types" + + "github.com/stretchr/testify/require" +) + +func TestMap(t *testing.T) { + sk, ctx := deps() + m := NewMap(sk, NewPrefix("hi"), Uint64Key, Uint64Value) + + // test not has + has, err := m.Has(ctx, 1) + require.NoError(t, err) + require.False(t, has) + // test get error + _, err = m.Get(ctx, 1) + require.ErrorIs(t, err, ErrNotFound) + + // test set/get + err = m.Set(ctx, 1, 100) + require.NoError(t, err) + v, err := m.Get(ctx, 1) + require.NoError(t, err) + require.Equal(t, uint64(100), v) + + // test remove + err = m.Remove(ctx, 1) + require.NoError(t, err) + has, err = m.Has(ctx, 1) + require.NoError(t, err) + require.False(t, has) +} + +func TestMap_encodeKey(t *testing.T) { + prefix := "prefix" + number := []byte{0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0} + expectedKey := append([]byte(prefix), number...) + + m := NewMap(storetypes.NewKVStoreKey("test"), NewPrefix(prefix), Uint64Key, Uint64Value) + + gotKey, err := m.encodeKey(0) + require.NoError(t, err) + require.Equal(t, expectedKey, gotKey) +} diff --git a/collections/values.go b/collections/values.go new file mode 100644 index 000000000000..0bc6ec913e18 --- /dev/null +++ b/collections/values.go @@ -0,0 +1,29 @@ +package collections + +import ( + "encoding/binary" + "fmt" +) + +var Uint64Value ValueCodec[uint64] = uint64Value{} + +type uint64Value struct{} + +func (u uint64Value) Encode(value uint64) ([]byte, error) { + return binary.BigEndian.AppendUint64(make([]byte, 0, 8), value), nil +} + +func (u uint64Value) Decode(b []byte) (uint64, error) { + if len(b) != 8 { + return 0, fmt.Errorf("%w: uint64 value size invalid, want: 8, got: %d", ErrEncoding, len(b)) + } + return binary.BigEndian.Uint64(b), nil +} + +func (u uint64Value) Stringify(value uint64) string { + return Uint64Key.Stringify(value) +} + +func (u uint64Value) ValueType() string { + return Uint64Key.KeyType() +} diff --git a/collections/values_test.go b/collections/values_test.go new file mode 100644 index 000000000000..3a63dd4234cb --- /dev/null +++ b/collections/values_test.go @@ -0,0 +1,18 @@ +package collections + +import ( + "testing" + + "github.com/stretchr/testify/require" +) + +func TestUint64Value(t *testing.T) { + t.Run("bijective", func(t *testing.T) { + checkValueCodec(t, Uint64Value, 555) + }) + + t.Run("invalid size", func(t *testing.T) { + _, err := Uint64Value.Decode([]byte{0x1, 0x2}) + require.ErrorIs(t, err, ErrEncoding) + }) +} diff --git a/go.work.example b/go.work.example index d5f05768f129..8fbad64845da 100644 --- a/go.work.example +++ b/go.work.example @@ -4,6 +4,7 @@ use ( . ./api ./client/v2 + ./collections ./core ./depinject ./errors