(VDB-354) Queue unrecognized storage diffs

- If we recognize a storage diff as coming from a watched contract but
  don't recognize the key, queue it for retrying later (after we've seen
  an event that might help us recognize the key)
- Remove unused errs and args
- Panic on unrecognized types (should not happen)

db/migrations/20190219134901_create_queued_storage.sql

@@ -0,0 +1,12 @@
+-- +goose Up
+CREATE TABLE public.queued_storage (
+  id            SERIAL PRIMARY KEY,
+  block_height  BIGINT,
+  block_hash    BYTEA,
+  contract      BYTEA,
+  storage_key   BYTEA,
+  storage_value BYTEA
+);
+
+-- +goose Down
+DROP TABLE public.queued_storage;

db/schema.sql

@@ -2,8 +2,8 @@
 -- PostgreSQL database dump
 --
 
--- Dumped from database version 10.5
--- Dumped by pg_dump version 10.5
+-- Dumped from database version 10.6
+-- Dumped by pg_dump version 10.6
 
 SET statement_timeout = 0;
 SET lock_timeout = 0;
@@ -2643,6 +2643,40 @@ CREATE SEQUENCE public.nodes_id_seq
 ALTER SEQUENCE public.nodes_id_seq OWNED BY public.eth_nodes.id;
 
 
+--
+-- Name: queued_storage; Type: TABLE; Schema: public; Owner: -
+--
+
+CREATE TABLE public.queued_storage (
+    id integer NOT NULL,
+    block_height bigint,
+    block_hash bytea,
+    contract bytea,
+    storage_key bytea,
+    storage_value bytea
+);
+
+
+--
+-- Name: queued_storage_id_seq; Type: SEQUENCE; Schema: public; Owner: -
+--
+
+CREATE SEQUENCE public.queued_storage_id_seq
+    AS integer
+    START WITH 1
+    INCREMENT BY 1
+    NO MINVALUE
+    NO MAXVALUE
+    CACHE 1;
+
+
+--
+-- Name: queued_storage_id_seq; Type: SEQUENCE OWNED BY; Schema: public; Owner: -
+--
+
+ALTER SEQUENCE public.queued_storage_id_seq OWNED BY public.queued_storage.id;
+
+
 --
 -- Name: receipts; Type: TABLE; Schema: public; Owner: -
 --
@@ -3321,6 +3355,13 @@ ALTER TABLE ONLY public.log_filters ALTER COLUMN id SET DEFAULT nextval('public.
 ALTER TABLE ONLY public.logs ALTER COLUMN id SET DEFAULT nextval('public.logs_id_seq'::regclass);
 
 
+--
+-- Name: queued_storage id; Type: DEFAULT; Schema: public; Owner: -
+--
+
+ALTER TABLE ONLY public.queued_storage ALTER COLUMN id SET DEFAULT nextval('public.queued_storage_id_seq'::regclass);
+
+
 --
 -- Name: receipts id; Type: DEFAULT; Schema: public; Owner: -
 --
@@ -4197,6 +4238,14 @@ ALTER TABLE ONLY public.eth_nodes
     ADD CONSTRAINT nodes_pkey PRIMARY KEY (id);
 
 
+--
+-- Name: queued_storage queued_storage_pkey; Type: CONSTRAINT; Schema: public; Owner: -
+--
+
+ALTER TABLE ONLY public.queued_storage
+    ADD CONSTRAINT queued_storage_pkey PRIMARY KEY (id);
+
+
 --
 -- Name: receipts receipts_pkey; Type: CONSTRAINT; Schema: public; Owner: -
 --

libraries/shared/storage_queue.go

@@ -0,0 +1,26 @@
+package shared
+
+import (
+	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/storage_diffs/shared"
+)
+
+type IStorageQueue interface {
+	Add(row shared.StorageDiffRow) error
+}
+
+type StorageQueue struct {
+	db *postgres.DB
+}
+
+func NewStorageQueue(db *postgres.DB) StorageQueue {
+	return StorageQueue{db: db}
+}
+
+func (queue StorageQueue) Add(row shared.StorageDiffRow) error {
+	_, err := queue.db.Exec(`INSERT INTO public.queued_storage (contract,
+		block_hash, block_height, storage_key, storage_value) VALUES
+		($1, $2, $3, $4, $5)`, row.Contract.Bytes(), row.BlockHash.Bytes(),
+		row.BlockHeight, row.StorageKey.Bytes(), row.StorageValue.Bytes())
+	return err
+}

libraries/shared/storage_queue_test.go

@@ -0,0 +1,32 @@
+package shared_test
+
+import (
+	"github.com/ethereum/go-ethereum/common"
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+	shared2 "github.com/vulcanize/vulcanizedb/libraries/shared"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/storage_diffs/shared"
+	"github.com/vulcanize/vulcanizedb/test_config"
+)
+
+var _ = Describe("Storage queue", func() {
+	It("adds a storage row to the db", func() {
+		row := shared.StorageDiffRow{
+			Contract:     common.HexToAddress("0x123456"),
+			BlockHash:    common.HexToHash("0x678901"),
+			BlockHeight:  987,
+			StorageKey:   common.HexToHash("0x654321"),
+			StorageValue: common.HexToHash("0x198765"),
+		}
+		db := test_config.NewTestDB(test_config.NewTestNode())
+		queue := shared2.NewStorageQueue(db)
+
+		addErr := queue.Add(row)
+
+		Expect(addErr).NotTo(HaveOccurred())
+		var result shared.StorageDiffRow
+		getErr := db.Get(&result, `SELECT contract, block_hash, block_height, storage_key, storage_value FROM public.queued_storage`)
+		Expect(getErr).NotTo(HaveOccurred())
+		Expect(result).To(Equal(row))
+	})
+})

libraries/shared/storage_watcher.go

@@ -22,6 +22,7 @@ import (
 	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared/storage"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/storage_diffs/shared"
+	"reflect"
 	"strings"
 
 	"github.com/vulcanize/vulcanizedb/pkg/fs"
@@ -30,14 +31,17 @@ import (
 type StorageWatcher struct {
 	db           *postgres.DB
 	tailer       fs.Tailer
+	Queue        IStorageQueue
 	Transformers map[common.Address]storage.Transformer
 }
 
 func NewStorageWatcher(tailer fs.Tailer, db *postgres.DB) StorageWatcher {
 	transformers := make(map[common.Address]storage.Transformer)
+	queue := NewStorageQueue(db)
 	return StorageWatcher{
 		db:           db,
 		tailer:       tailer,
+		Queue:        queue,
 		Transformers: transformers,
 	}
 }
@@ -66,9 +70,20 @@ func (watcher StorageWatcher) Execute() error {
 		}
 		executeErr := transformer.Execute(row)
 		if executeErr != nil {
-			logrus.Warn(executeErr.Error())
+			if isKeyNotFound(executeErr) {
+				queueErr := watcher.Queue.Add(row)
+				if queueErr != nil {
+					logrus.Warn(queueErr.Error())
+				}
+			} else {
+				logrus.Warn(executeErr.Error())
+			}
 			continue
 		}
 	}
 	return nil
 }
+
+func isKeyNotFound(executeErr error) bool {
+	return reflect.TypeOf(executeErr) == reflect.TypeOf(shared.ErrStorageKeyNotFound{})
+}

libraries/shared/storage_watcher_test.go

@@ -73,11 +73,8 @@ var _ = Describe("Storage Watcher", func() {
 
 	It("logs error if no transformer can parse storage row", func() {
 		mockTailer := fakes.NewMockTailer()
-		line := &tail.Line{
-			Text: "12345,block_hash,123,storage_key,storage_value",
-			Time: time.Time{},
-			Err:  nil,
-		}
+		address := common.HexToAddress("0x12345")
+		line := getFakeLine(address.Bytes())
 		watcher := shared.NewStorageWatcher(mockTailer, test_config.NewTestDB(core.Node{}))
 		tempFile, err := ioutil.TempFile("", "log")
 		defer os.Remove(tempFile.Name())
@@ -88,22 +85,14 @@ var _ = Describe("Storage Watcher", func() {
 			Expect(err).NotTo(HaveOccurred())
 			logContent, readErr := ioutil.ReadFile(tempFile.Name())
 			Expect(readErr).NotTo(HaveOccurred())
-			Expect(string(logContent)).To(ContainSubstring(shared2.ErrContractNotFound{Contract: common.HexToAddress("0x12345").Hex()}.Error()))
+			Expect(string(logContent)).To(ContainSubstring(shared2.ErrContractNotFound{Contract: address.Hex()}.Error()))
 		}, watcher, mockTailer, []*tail.Line{line})
 	})
 
 	It("executes transformer with storage row", func() {
 		address := []byte{1, 2, 3}
-		blockHash := []byte{4, 5, 6}
-		blockHeight := int64(789)
-		storageKey := []byte{9, 8, 7}
-		storageValue := []byte{6, 5, 4}
+		line := getFakeLine(address)
 		mockTailer := fakes.NewMockTailer()
-		line := &tail.Line{
-			Text: fmt.Sprintf("%s,%s,%d,%s,%s", common.Bytes2Hex(address), common.Bytes2Hex(blockHash), blockHeight, common.Bytes2Hex(storageKey), common.Bytes2Hex(storageValue)),
-			Time: time.Time{},
-			Err:  nil,
-		}
 		watcher := shared.NewStorageWatcher(mockTailer, test_config.NewTestDB(core.Node{}))
 		fakeTransformer := &mocks.MockStorageTransformer{Address: common.BytesToAddress(address)}
 		watcher.AddTransformers([]storage.TransformerInitializer{fakeTransformer.FakeTransformerInitializer})
@@ -116,40 +105,76 @@ var _ = Describe("Storage Watcher", func() {
 		}, watcher, mockTailer, []*tail.Line{line})
 	})
 
-	It("logs error if executing transformer fails", func() {
-		address := []byte{1, 2, 3}
-		blockHash := []byte{4, 5, 6}
-		blockHeight := int64(789)
-		storageKey := []byte{9, 8, 7}
-		storageValue := []byte{6, 5, 4}
-		mockTailer := fakes.NewMockTailer()
-		line := &tail.Line{
-			Text: fmt.Sprintf("%s,%s,%d,%s,%s", common.Bytes2Hex(address), common.Bytes2Hex(blockHash), blockHeight, common.Bytes2Hex(storageKey), common.Bytes2Hex(storageValue)),
-			Time: time.Time{},
-			Err:  nil,
-		}
-		watcher := shared.NewStorageWatcher(mockTailer, test_config.NewTestDB(core.Node{}))
-		executionError := errors.New("storage watcher failed attempting to execute transformer")
-		fakeTransformer := &mocks.MockStorageTransformer{Address: common.BytesToAddress(address), ExecuteErr: executionError}
-		watcher.AddTransformers([]storage.TransformerInitializer{fakeTransformer.FakeTransformerInitializer})
-		tempFile, err := ioutil.TempFile("", "log")
-		defer os.Remove(tempFile.Name())
-		Expect(err).NotTo(HaveOccurred())
-		logrus.SetOutput(tempFile)
+	Describe("when executing transformer fails", func() {
+		It("queues row when error is storage key not found", func() {
+			address := []byte{1, 2, 3}
+			line := getFakeLine(address)
+			mockTailer := fakes.NewMockTailer()
+			watcher := shared.NewStorageWatcher(mockTailer, test_config.NewTestDB(core.Node{}))
+			mockQueue := &mocks.MockStorageQueue{}
+			watcher.Queue = mockQueue
+			keyNotFoundError := shared2.ErrStorageKeyNotFound{Key: "unknown_storage_key"}
+			fakeTransformer := &mocks.MockStorageTransformer{Address: common.BytesToAddress(address), ExecuteErr: keyNotFoundError}
+			watcher.AddTransformers([]storage.TransformerInitializer{fakeTransformer.FakeTransformerInitializer})
 
-		assert(func(err error) {
+			assert(func(err error) {
+				Expect(err).NotTo(HaveOccurred())
+				Expect(mockQueue.AddCalled).To(BeTrue())
+			}, watcher, mockTailer, []*tail.Line{line})
+		})
+
+		It("logs error if queuing row fails", func() {
+			address := []byte{1, 2, 3}
+			line := getFakeLine(address)
+			mockTailer := fakes.NewMockTailer()
+			watcher := shared.NewStorageWatcher(mockTailer, test_config.NewTestDB(core.Node{}))
+			mockQueue := &mocks.MockStorageQueue{}
+			mockQueue.AddError = fakes.FakeError
+			watcher.Queue = mockQueue
+			keyNotFoundError := shared2.ErrStorageKeyNotFound{Key: "unknown_storage_key"}
+			fakeTransformer := &mocks.MockStorageTransformer{Address: common.BytesToAddress(address), ExecuteErr: keyNotFoundError}
+			watcher.AddTransformers([]storage.TransformerInitializer{fakeTransformer.FakeTransformerInitializer})
+			tempFile, err := ioutil.TempFile("", "log")
+			defer os.Remove(tempFile.Name())
 			Expect(err).NotTo(HaveOccurred())
-			logContent, readErr := ioutil.ReadFile(tempFile.Name())
-			Expect(readErr).NotTo(HaveOccurred())
-			Expect(string(logContent)).To(ContainSubstring(executionError.Error()))
-		}, watcher, mockTailer, []*tail.Line{line})
+			logrus.SetOutput(tempFile)
+
+			assert(func(err error) {
+				Expect(err).NotTo(HaveOccurred())
+				Expect(mockQueue.AddCalled).To(BeTrue())
+				logContent, readErr := ioutil.ReadFile(tempFile.Name())
+				Expect(readErr).NotTo(HaveOccurred())
+				Expect(string(logContent)).To(ContainSubstring(fakes.FakeError.Error()))
+			}, watcher, mockTailer, []*tail.Line{line})
+		})
+
+		It("logs any other error", func() {
+			address := []byte{1, 2, 3}
+			line := getFakeLine(address)
+			mockTailer := fakes.NewMockTailer()
+			watcher := shared.NewStorageWatcher(mockTailer, test_config.NewTestDB(core.Node{}))
+			executionError := errors.New("storage watcher failed attempting to execute transformer")
+			fakeTransformer := &mocks.MockStorageTransformer{Address: common.BytesToAddress(address), ExecuteErr: executionError}
+			watcher.AddTransformers([]storage.TransformerInitializer{fakeTransformer.FakeTransformerInitializer})
+			tempFile, err := ioutil.TempFile("", "log")
+			defer os.Remove(tempFile.Name())
+			Expect(err).NotTo(HaveOccurred())
+			logrus.SetOutput(tempFile)
+
+			assert(func(err error) {
+				Expect(err).NotTo(HaveOccurred())
+				logContent, readErr := ioutil.ReadFile(tempFile.Name())
+				Expect(readErr).NotTo(HaveOccurred())
+				Expect(string(logContent)).To(ContainSubstring(executionError.Error()))
+			}, watcher, mockTailer, []*tail.Line{line})
+		})
 	})
 })
 
 func assert(assertion func(err error), watcher shared.StorageWatcher, mockTailer *fakes.MockTailer, lines []*tail.Line) {
 	errs := make(chan error, 1)
 	done := make(chan bool, 1)
-	go execute(watcher, mockTailer, errs, done)
+	go execute(watcher, errs, done)
 	for _, line := range lines {
 		mockTailer.Lines <- line
 	}
@@ -165,7 +190,7 @@ func assert(assertion func(err error), watcher shared.StorageWatcher, mockTailer
 	}
 }
 
-func execute(watcher shared.StorageWatcher, tailer *fakes.MockTailer, errs chan error, done chan bool) {
+func execute(watcher shared.StorageWatcher, errs chan error, done chan bool) {
 	err := watcher.Execute()
 	if err != nil {
 		errs <- err
@@ -173,3 +198,15 @@ func execute(watcher shared.StorageWatcher, tailer *fakes.MockTailer, errs chan
 		done <- true
 	}
 }
+
+func getFakeLine(address []byte) *tail.Line {
+	blockHash := []byte{4, 5, 6}
+	blockHeight := int64(789)
+	storageKey := []byte{9, 8, 7}
+	storageValue := []byte{6, 5, 4}
+	return &tail.Line{
+		Text: fmt.Sprintf("%s,%s,%d,%s,%s", common.Bytes2Hex(address), common.Bytes2Hex(blockHash), blockHeight, common.Bytes2Hex(storageKey), common.Bytes2Hex(storageValue)),
+		Time: time.Time{},
+		Err:  nil,
+	}
+}

pkg/transformers/storage_diffs/shared/decoder.go

@@ -17,6 +17,7 @@
 package shared
 
 import (
+	"fmt"
 	"github.com/ethereum/go-ethereum/common"
 	"math/big"
 )
@@ -30,7 +31,7 @@ func Decode(row StorageDiffRow, metadata StorageValueMetadata) (interface{}, err
 	case Bytes32:
 		return row.StorageValue.Hex(), nil
 	default:
-		return nil, ErrTypeNotFound{}
+		panic(fmt.Sprintf("can't decode unknown type: %d", metadata.Type))
 	}
 }
 

pkg/transformers/storage_diffs/shared/decoder_test.go

@@ -46,13 +46,4 @@ var _ = Describe("Storage decoder", func() {
 		Expect(err).NotTo(HaveOccurred())
 		Expect(result).To(Equal(fakeAddress.Hex()))
 	})
-
-	It("returns error if attempting to decode unknown type", func() {
-		metadata := shared.StorageValueMetadata{Type: 100}
-
-		_, err := shared.Decode(shared.StorageDiffRow{}, metadata)
-
-		Expect(err).To(HaveOccurred())
-		Expect(err).To(MatchError(shared.ErrTypeNotFound{}))
-	})
 })

pkg/transformers/storage_diffs/shared/errors.go

@@ -28,16 +28,6 @@ func (e ErrContractNotFound) Error() string {
 	return fmt.Sprintf("transformer not found for contract: %s", e.Contract)
 }
 
-type ErrHeaderMismatch struct {
-	BlockHeight int
-	DbHash      string
-	DiffHash    string
-}
-
-func (e ErrHeaderMismatch) Error() string {
-	return fmt.Sprintf("header hash in row does not match db at height %d - row: %s, db: %s", e.BlockHeight, e.DbHash, e.DiffHash)
-}
-
 type ErrMetadataMalformed struct {
 	MissingData Key
 }
@@ -61,11 +51,3 @@ type ErrStorageKeyNotFound struct {
 func (e ErrStorageKeyNotFound) Error() string {
 	return fmt.Sprintf("unknown storage key: %s", e.Key)
 }
-
-type ErrTypeNotFound struct {
-	Type int
-}
-
-func (e ErrTypeNotFound) Error() string {
-	return fmt.Sprintf("no decoder for type: %d", e.Type)
-}

pkg/transformers/storage_diffs/shared/row.go

@@ -25,10 +25,10 @@ const ExpectedRowLength = 5
 
 type StorageDiffRow struct {
 	Contract     common.Address
-	BlockHash    common.Hash
-	BlockHeight  int
-	StorageKey   common.Hash
-	StorageValue common.Hash
+	BlockHash    common.Hash `db:"block_hash"`
+	BlockHeight  int         `db:"block_height"`
+	StorageKey   common.Hash `db:"storage_key"`
+	StorageValue common.Hash `db:"storage_value"`
 }
 
 func FromStrings(csvRow []string) (StorageDiffRow, error) {

pkg/transformers/test_data/mocks/storage_queue.go

@@ -0,0 +1,15 @@
+package mocks
+
+import (
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/storage_diffs/shared"
+)
+
+type MockStorageQueue struct {
+	AddCalled bool
+	AddError  error
+}
+
+func (queue *MockStorageQueue) Add(row shared.StorageDiffRow) error {
+	queue.AddCalled = true
+	return queue.AddError
+}