.github/workflows/on-pr.yaml

@@ -11,7 +11,7 @@ jobs:
       - name: Run docker build
         run: make docker-build
   test:
-    name: Run integration tests
+    name: Run unit tests
     env:
       GOPATH: /tmp/go
     strategy:
@@ -33,3 +33,28 @@ jobs:
         run: |
           sleep 10
           PGPASSWORD=password DATABASE_USER=vdbm DATABASE_PORT=8077 DATABASE_PASSWORD=password DATABASE_HOSTNAME=127.0.0.1 make test
+
+  integrationtest:
+    name: Run integration tests
+    env:
+      GOPATH: /tmp/go
+    strategy:
+      matrix:
+        go-version: [1.15.x]
+        os: [ubuntu-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Create GOPATH
+        run: mkdir -p /tmp/go
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go-version }}
+      - uses: actions/checkout@v2
+      - name: Run database
+        run: docker-compose -f docker-compose.test.yml -f docker-compose.yml up -d db dapptools contract eth-server
+      - name: Test
+        run: |
+          while [ "$(curl -s -o /dev/null -w ''%{http_code}'' localhost:8081)" != "200" ]; do echo "waiting for ipld-eth-server..." && sleep 5; done && \
+          while [ "$(curl -s -o /dev/null -w ''%{http_code}'' localhost:8545)" != "200" ]; do echo "waiting for geth-statediff..." && sleep 5; done && \
+          make integrationtest

Dockerfile

@@ -6,8 +6,17 @@ RUN apk add busybox-extras
 
 # Build ipld-eth-server
 WORKDIR /go/src/github.com/vulcanize/ipld-eth-server
-ADD . .
-RUN GO111MODULE=on GCO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -ldflags '-extldflags "-static"' -o ipld-eth-server .
+
+# Cache the modules
+ENV GO111MODULE=on
+COPY go.mod .
+COPY go.sum .
+RUN go mod download
+
+COPY . .
+
+# Build the binary
+RUN GCO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -ldflags '-extldflags "-static"' -o ipld-eth-server .
 
 # Copy migration tool
 WORKDIR /

Makefile

@@ -61,39 +61,25 @@ test: | $(GINKGO) $(GOOSE)
 	dropdb -h $(DATABASE_HOSTNAME) -p $(DATABASE_PORT) -U $(DATABASE_USER) --if-exists $(TEST_DB)
 	createdb -h $(DATABASE_HOSTNAME) -p $(DATABASE_PORT) -U $(DATABASE_USER) $(TEST_DB)
 	$(GOOSE) -dir db/migrations postgres "$(TEST_CONNECT_STRING)" up
-	$(GINKGO) -r --skipPackage=integration_tests,integration
+	$(GINKGO) -r --skipPackage=test
 
 .PHONY: integrationtest
 integrationtest: | $(GINKGO) $(GOOSE)
 	go vet ./...
 	go fmt ./...
-	export PGPASSWORD=$(DATABASE_PASSWORD)
-	dropdb -h $(DATABASE_HOSTNAME) -p $(DATABASE_PORT) -U $(DATABASE_USER) --if-exists $(TEST_DB)
-	createdb -h $(DATABASE_HOSTNAME) -p $(DATABASE_PORT) -U $(DATABASE_USER) $(TEST_DB)
-	$(GOOSE) -dir db/migrations postgres "$(TEST_CONNECT_STRING)" up
-	$(GINKGO) -r integration_test/
+	$(GINKGO) -r test/ -v
 
 .PHONY: test_local
 test_local: | $(GINKGO) $(GOOSE)
 	go vet ./...
 	go fmt ./...
-	dropdb -h $(HOST_NAME) -p $(PORT) -U $(USER) --if-exists $(TEST_DB)
-	createdb -h $(HOST_NAME) -p $(PORT) -U $(USER) $(TEST_DB)
-	$(GOOSE) -dir db/migrations postgres "$(TEST_CONNECT_STRING_LOCAL)" up
-	$(GOOSE) -dir db/migrations postgres "$(TEST_CONNECT_STRING_LOCAL)" reset
-	make migrate NAME=$(TEST_DB)
-	$(GINKGO) -r --skipPackage=integration_tests,integration
+	./scripts/run_unit_test.sh
 
 .PHONY: integrationtest_local
 integrationtest_local: | $(GINKGO) $(GOOSE)
 	go vet ./...
 	go fmt ./...
-	dropdb -h $(HOST_NAME) -p $(PORT) -U $(USER) --if-exists $(TEST_DB)
-	createdb -h $(HOST_NAME) -p $(PORT) -U $(USER) $(TEST_DB)
-	$(GOOSE) -dir db/migrations postgres "$(TEST_CONNECT_STRING_LOCAL)" up
-	$(GOOSE) -dir db/migrations postgres "$(TEST_CONNECT_STRING_LOCAL)" reset
-	make migrate NAME=$(TEST_DB)
-	$(GINKGO) -r integration_test/
+	./scripts/run_intregration_test.sh
 
 build:
 	go fmt ./...

README.md

@@ -135,9 +135,9 @@ TODO: Add the rest of the standard endpoints and unique endpoints (e.g. getSlice
 | `eth-server-graphql`          | `ETH_SERVER_GRAPHQL`          | false            | If `true` enable Eth GraphQL Server |
 | `eth-server-graphql-path` | `ETH_SERVER_GRAPHQLPATH` |                  | If `eth-server-graphql` set to true, endpoint url for graphql server (host:port)                               |
 | `eth-server-http`          | `ETH_SERVER_HTTP`          | true            | If `true` enable Eth HTTP JSON-RPC Server |
-| `eth-server-http-path`          | `ETH_SERVER_HTTP_PATH`          |             | If `eth-server-http` set to `true`, endpoint url for Eth HTTP JSON-RPC server (host:port)  |
+| `eth-server-http-path`          | `ETH_SERVER_HTTPPATH`          |             | If `eth-server-http` set to `true`, endpoint url for Eth HTTP JSON-RPC server (host:port)  |
 | `eth-server-ws`          | `ETH_SERVER_WS`          | false            | If `true` enable Eth WS JSON-RPC Server |
-| `eth-server-ws-path`          | `ETH_SERVER_WS_PATH`          |             | If `eth-server-ws` set to `true`, endpoint url for Eth WS JSON-RPC server (host:port)  |
+| `eth-server-ws-path`          | `ETH_SERVER_WSPATH`          |             | If `eth-server-ws` set to `true`, endpoint url for Eth WS JSON-RPC server (host:port)  |
 | `eth-server-ipc`          | `ETH_SERVER_IPC`          | false            | If `true` enable Eth IPC JSON-RPC Server |
 | `eth-server-ipc-path`          | `ETH_SERVER_IPC_PATH`          |             | If `eth-server-ws` set to `true`, path for Eth IPC JSON-RPC server |
 | `ipld-server-graphql`          | `IPLD_SERVER_GRAPHQL`          | false            | If `true` enable IPLD GraphQL Server |

chain.json

@@ -0,0 +1,16 @@
+{
+  "chainId": 4,
+  "homesteadBlock": 1,
+  "eip150Block": 2,
+  "eip150Hash": "0x9b095b36c15eaf13044373aef8ee0bd3a382a5abb92e402afa44b8249c3a90e9",
+  "eip155Block": 3,
+  "eip158Block": 3,
+  "byzantiumBlock": 3,
+  "constantinopleBlock": 3,
+  "petersburgBlock": 3,
+  "istanbulBlock": 3,
+  "clique": {
+    "period": 15,
+    "epoch": 30000
+  }
+}

docker-compose.test.yml

@@ -0,0 +1,14 @@
+version: '3.2'
+
+services:
+  contract:
+    depends_on:
+      - dapptools
+    build:
+      context: ./test/contract
+      args:
+        ETH_ADDR: "http://dapptools:8545"
+    environment:
+      ETH_ADDR: "http://dapptools:8545"
+    ports:
+      - "127.0.0.1:3000:3000"

docker-compose.yml

@@ -20,7 +20,7 @@ services:
     restart: on-failure
     depends_on:
       - db
-    image: vulcanize/statediff-migrations:v0.3.0
+    image: vulcanize/statediff-migrations:v0.4.0
     environment:
       DATABASE_USER: vdbm
       DATABASE_NAME: vulcanize_public
@@ -41,6 +41,7 @@ services:
      - "127.0.0.1:8077:5432"
 
   eth-server:
+    restart: unless-stopped
     depends_on:
       - db
     build:
@@ -49,16 +50,22 @@ services:
        - alpine:latest
        - golang:1.13-alpine
     environment:
+      IPLD_SERVER_GRAPHQL: "true"
+      IPLD_POSTGRAPHILEPATH: http://graphql:5000
+      ETH_SERVER_HTTPPATH: 0.0.0.0:8081
       VDB_COMMAND: "serve"
+      ETH_CHAIN_CONFIG: "/tmp/chain.json"
       DATABASE_NAME: "vulcanize_public"
       DATABASE_HOSTNAME: "db"
       DATABASE_PORT: 5432
       DATABASE_USER: "vdbm"
       DATABASE_PASSWORD: "password"
-      SERVER_WS_PATH: "0.0.0.0:8081"
-      SERVER_HTTP_PATH: "0.0.0.0:8082"
+      ETH_CHAIN_ID: 4
+    volumes:
+    - type: bind
+      source: ./chain.json
+      target: /tmp/chain.json
     ports:
-     - "127.0.0.1:8080:8080"
      - "127.0.0.1:8081:8081"
 
   graphql:

pkg/eth/api.go

@@ -18,9 +18,11 @@ package eth
 
 import (
 	"context"
+	"database/sql"
 	"encoding/json"
 	"errors"
 	"fmt"
+	"io"
 	"math"
 	"math/big"
 	"time"
@@ -38,7 +40,6 @@ import (
 	"github.com/ethereum/go-ethereum/statediff"
 	"github.com/sirupsen/logrus"
 
-	"github.com/vulcanize/ipld-eth-indexer/pkg/eth"
 	"github.com/vulcanize/ipld-eth-server/pkg/shared"
 )
 
@@ -167,6 +168,21 @@ func (pea *PublicEthAPI) GetBlockByHash(ctx context.Context, hash common.Hash, f
 	return nil, err
 }
 
+// ChainId is the EIP-155 replay-protection chain id for the current ethereum chain config.
+func (pea *PublicEthAPI) ChainId() hexutil.Uint64 {
+	chainID := new(big.Int)
+	block, err := pea.B.CurrentBlock()
+	if err != nil {
+		logrus.Errorf("ChainId failed with err %s", err.Error())
+
+		return 0
+	}
+	if config := pea.B.Config.ChainConfig; config.IsEIP155(block.Number()) {
+		chainID = config.ChainID
+	}
+	return (hexutil.Uint64)(chainID.Uint64())
+}
+
 /*
 
 Uncles
@@ -440,6 +456,14 @@ func (pea *PublicEthAPI) localGetTransactionReceipt(ctx context.Context, hash co
 	if err != nil {
 		return nil, err
 	}
+	block, err := pea.B.BlockByHash(ctx, blockHash)
+	if err != nil {
+		return nil, err
+	}
+	err = receipts.DeriveFields(pea.B.Config.ChainConfig, blockHash, blockNumber, block.Transactions())
+	if err != nil {
+		return nil, err
+	}
 	if len(receipts) <= int(index) {
 		return nil, nil
 	}
@@ -525,9 +549,11 @@ func (pea *PublicEthAPI) localGetLogs(crit filters.FilterCriteria) ([]*types.Log
 	for i, addr := range crit.Addresses {
 		addrStrs[i] = addr.String()
 	}
-	topicStrSets := make([][]string, 4)
+
+	topicStrSets := make([][]string, len(crit.Topics))
 	for i, topicSet := range crit.Topics {
 		if i > 3 {
+			topicStrSets = topicStrSets[:4]
 			// don't allow more than 4 topics
 			break
 		}
@@ -569,8 +595,13 @@ func (pea *PublicEthAPI) localGetLogs(crit filters.FilterCriteria) ([]*types.Log
 		if err := tx.Commit(); err != nil {
 			return nil, err
 		}
-		return extractLogsOfInterest(rctIPLDs, filter.Topics)
+		block, err := pea.B.BlockByHash(context.Background(), *crit.BlockHash)
+		if err != nil {
+			return nil, err
+		}
+		return extractLogsOfInterest(pea.B.Config.ChainConfig, *crit.BlockHash, block.NumberU64(), block.Transactions(), rctIPLDs, filter)
 	}
+
 	// Otherwise, create block range from criteria
 	// nil values are filled in; to request a single block have both ToBlock and FromBlock equal that number
 	startingBlock := crit.FromBlock
@@ -578,6 +609,7 @@ func (pea *PublicEthAPI) localGetLogs(crit filters.FilterCriteria) ([]*types.Log
 	if startingBlock == nil {
 		startingBlock = common.Big0
 	}
+
 	if endingBlock == nil {
 		endingBlockInt, err := pea.B.Retriever.RetrieveLastBlockNumber()
 		if err != nil {
@@ -585,24 +617,38 @@ func (pea *PublicEthAPI) localGetLogs(crit filters.FilterCriteria) ([]*types.Log
 		}
 		endingBlock = big.NewInt(endingBlockInt)
 	}
+
 	start := startingBlock.Int64()
 	end := endingBlock.Int64()
-	allRctCIDs := make([]eth.ReceiptModel, 0)
+	var logs []*types.Log
 	for i := start; i <= end; i++ {
 		rctCIDs, err := pea.B.Retriever.RetrieveRctCIDs(tx, filter, i, nil, nil)
 		if err != nil {
 			return nil, err
 		}
-		allRctCIDs = append(allRctCIDs, rctCIDs...)
-	}
-	rctIPLDs, err := pea.B.Fetcher.FetchRcts(tx, allRctCIDs)
-	if err != nil {
-		return nil, err
+
+		block, err := pea.B.BlockByNumber(context.Background(), rpc.BlockNumber(i))
+		if err != nil {
+			return nil, err
+		}
+
+		rctIPLDs, err := pea.B.Fetcher.FetchRcts(tx, rctCIDs)
+		if err != nil {
+			return nil, err
+		}
+
+		log, err := extractLogsOfInterest(pea.B.Config.ChainConfig, block.Hash(), uint64(i), block.Transactions(), rctIPLDs, filter)
+		if err != nil {
+			return nil, err
+		}
+
+		logs = append(logs, log...)
 	}
+
 	if err := tx.Commit(); err != nil {
 		return nil, err
 	}
-	logs, err := extractLogsOfInterest(rctIPLDs, filter.Topics)
+
 	return logs, err // need to return err variable so that we return the err = tx.Commit() assignment in the defer
 }
 
@@ -627,6 +673,10 @@ func (pea *PublicEthAPI) GetBalance(ctx context.Context, address common.Address,
 			return res, nil
 		}
 	}
+	if err == sql.ErrNoRows {
+		return (*hexutil.Big)(big.NewInt(0)), nil
+	}
+
 	return nil, err
 }
 
@@ -644,7 +694,17 @@ func (pea *PublicEthAPI) localGetBalance(ctx context.Context, address common.Add
 func (pea *PublicEthAPI) GetStorageAt(ctx context.Context, address common.Address, key string, blockNrOrHash rpc.BlockNumberOrHash) (hexutil.Bytes, error) {
 	storageVal, err := pea.B.GetStorageByNumberOrHash(ctx, address, common.HexToHash(key), blockNrOrHash)
 	if storageVal != nil && err == nil {
-		return storageVal, nil
+		var value common.Hash
+		_, content, _, err := rlp.Split(storageVal)
+		if err == io.ErrUnexpectedEOF {
+			return hexutil.Bytes{}, nil
+		}
+		if err != nil {
+			return nil, err
+		}
+		value.SetBytes(content)
+
+		return value[:], nil
 	}
 	if pea.rpc != nil {
 		var res hexutil.Bytes
@@ -653,6 +713,9 @@ func (pea *PublicEthAPI) GetStorageAt(ctx context.Context, address common.Addres
 			return res, nil
 		}
 	}
+	if err == sql.ErrNoRows {
+		return make([]byte, 32), nil
+	}
 	return nil, err
 }
 
@@ -669,6 +732,10 @@ func (pea *PublicEthAPI) GetCode(ctx context.Context, address common.Address, bl
 			return res, nil
 		}
 	}
+	if err == sql.ErrNoRows {
+		return code, nil
+	}
+
 	return nil, err
 }
 

pkg/eth/api_test.go

@@ -18,13 +18,16 @@ package eth_test
 
 import (
 	"context"
+	"math/big"
 	"strconv"
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/core/vm"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/eth/filters"
+	"github.com/ethereum/go-ethereum/params"
 	"github.com/ethereum/go-ethereum/rlp"
 	"github.com/ethereum/go-ethereum/rpc"
 	. "github.com/onsi/ginkgo"
@@ -168,7 +171,7 @@ var (
 		"to":                expectedTransaction3.To,
 		"gasUsed":           hexutil.Uint64(test_helpers.MockReceipts[2].GasUsed),
 		"cumulativeGasUsed": hexutil.Uint64(test_helpers.MockReceipts[2].CumulativeGasUsed),
-		"contractAddress":   nil,
+		"contractAddress":   test_helpers.ContractAddress,
 		"logs":              test_helpers.MockReceipts[2].Logs,
 		"logsBloom":         test_helpers.MockReceipts[2].Bloom,
 		"root":              hexutil.Bytes(test_helpers.MockReceipts[2].PostState),
@@ -177,8 +180,9 @@ var (
 
 var _ = Describe("API", func() {
 	var (
-		db  *postgres.DB
-		api *eth.PublicEthAPI
+		db          *postgres.DB
+		api         *eth.PublicEthAPI
+		chainConfig = params.TestChainConfig
 	)
 	// Test db setup, rather than using BeforeEach we only need to setup once since the tests do not mutate the database
 	// Note: if you focus one of the tests be sure to focus this and the defered It()
@@ -187,7 +191,11 @@ var _ = Describe("API", func() {
 		db, err = shared.SetupDB()
 		Expect(err).ToNot(HaveOccurred())
 		indexAndPublisher := eth2.NewIPLDPublisher(db)
-		backend, err := eth.NewEthBackend(db, &eth.Config{})
+		backend, err := eth.NewEthBackend(db, &eth.Config{
+			ChainConfig: chainConfig,
+			VmConfig:    vm.Config{},
+			RPCGasCap:   big.NewInt(10000000000), // Max gas capacity for a rpc call.
+		})
 		Expect(err).ToNot(HaveOccurred())
 		api = eth.NewPublicEthAPI(backend, nil, false)
 		err = indexAndPublisher.Publish(test_helpers.MockConvertedPayload)
@@ -271,10 +279,10 @@ var _ = Describe("API", func() {
 				Expect(val).To(Equal(block[key]))
 			}
 		})
-		It("Throws an error if a block cannot be found", func() {
-			_, err := api.GetBlockByNumber(ctx, wrongNumber, false)
-			Expect(err).To(HaveOccurred())
-			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+		It("Returns `nil` if a block cannot be found", func() {
+			block, err := api.GetBlockByNumber(ctx, wrongNumber, false)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(block).To(BeNil())
 		})
 	})
 
@@ -303,10 +311,10 @@ var _ = Describe("API", func() {
 				Expect(val).To(Equal(block[key]))
 			}
 		})
-		It("Throws an error if a block cannot be found", func() {
-			_, err := api.GetBlockByHash(ctx, randomHash, false)
-			Expect(err).To(HaveOccurred())
-			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+		It("Returns `nil` if a block cannot be found", func() {
+			block, err := api.GetBlockByHash(ctx, randomHash, false)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(block).To(BeZero())
 		})
 	})
 
@@ -325,10 +333,10 @@ var _ = Describe("API", func() {
 			Expect(err).ToNot(HaveOccurred())
 			Expect(uncle2).To(Equal(expectedUncle2))
 		})
-		It("Throws an error if an block for blocknumber cannot be found", func() {
-			_, err := api.GetUncleByBlockNumberAndIndex(ctx, wrongNumber, 0)
-			Expect(err).To(HaveOccurred())
-			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+		It("Returns `nil` if an block for block number cannot be found", func() {
+			block, err := api.GetUncleByBlockNumberAndIndex(ctx, wrongNumber, 0)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(block).To(BeNil())
 		})
 		It("Returns `nil` if an uncle at the provided index does not exist for the block found for the provided block number", func() {
 			uncle, err := api.GetUncleByBlockNumberAndIndex(ctx, number, 2)
@@ -346,10 +354,10 @@ var _ = Describe("API", func() {
 			Expect(err).ToNot(HaveOccurred())
 			Expect(uncle2).To(Equal(expectedUncle2))
 		})
-		It("Throws an error if an block for blockhash cannot be found", func() {
-			_, err := api.GetUncleByBlockHashAndIndex(ctx, randomHash, 0)
-			Expect(err).To(HaveOccurred())
-			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+		It("Returns `nil` if a block for blockhash cannot be found", func() {
+			block, err := api.GetUncleByBlockHashAndIndex(ctx, randomHash, 0)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(block).To(BeNil())
 		})
 		It("Returns `nil` if an uncle at the provided index does not exist for the block with the provided hash", func() {
 			uncle, err := api.GetUncleByBlockHashAndIndex(ctx, blockHash, 2)
@@ -361,6 +369,7 @@ var _ = Describe("API", func() {
 	Describe("eth_getUncleCountByBlockNumber", func() {
 		It("Retrieves the number of uncles for the canonical block with the provided number", func() {
 			count := api.GetUncleCountByBlockNumber(ctx, number)
+			Expect(*count).NotTo(Equal(nil))
 			Expect(uint64(*count)).To(Equal(uint64(2)))
 		})
 	})
@@ -368,6 +377,7 @@ var _ = Describe("API", func() {
 	Describe("eth_getUncleCountByBlockHash", func() {
 		It("Retrieves the number of uncles for the block with the provided hash", func() {
 			count := api.GetUncleCountByBlockHash(ctx, blockHash)
+			Expect(*count).NotTo(Equal(nil))
 			Expect(uint64(*count)).To(Equal(uint64(2)))
 		})
 	})
@@ -948,8 +958,17 @@ var _ = Describe("API", func() {
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal((*hexutil.Big)(common.Big0)))
 		})
-		It("Throws an error for an account it cannot find the balance for", func() {
-			_, err := api.GetBalance(ctx, randomAddr, rpc.BlockNumberOrHashWithHash(blockHash, true))
+		It("Retrieves the eth balance for the non-existing account address at the block with the provided hash", func() {
+			bal, err := api.GetBalance(ctx, randomAddr, rpc.BlockNumberOrHashWithHash(blockHash, true))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(bal).To(Equal((*hexutil.Big)(common.Big0)))
+		})
+		It("Throws an error for an account of a non-existing block hash", func() {
+			_, err := api.GetBalance(ctx, test_helpers.AccountAddresss, rpc.BlockNumberOrHashWithHash(randomHash, true))
+			Expect(err).To(HaveOccurred())
+		})
+		It("Throws an error for an account of a non-existing block number", func() {
+			_, err := api.GetBalance(ctx, test_helpers.AccountAddresss, rpc.BlockNumberOrHashWithNumber(wrongNumber))
 			Expect(err).To(HaveOccurred())
 		})
 	})
@@ -965,9 +984,10 @@ var _ = Describe("API", func() {
 			Expect(err).ToNot(HaveOccurred())
 			Expect(code).To(Equal((hexutil.Bytes)(test_helpers.ContractCode)))
 		})
-		It("Throws an error for an account it cannot find the code for", func() {
-			_, err := api.GetCode(ctx, randomAddr, rpc.BlockNumberOrHashWithHash(blockHash, true))
-			Expect(err).To(HaveOccurred())
+		It("Returns `nil` for an account it cannot find the code for", func() {
+			code, err := api.GetCode(ctx, randomAddr, rpc.BlockNumberOrHashWithHash(blockHash, true))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(code).To(BeEmpty())
 		})
 	})
 })

pkg/eth/backend.go

@@ -18,6 +18,7 @@ package eth
 
 import (
 	"context"
+	"database/sql"
 	"errors"
 	"fmt"
 	"math/big"
@@ -50,6 +51,8 @@ import (
 var (
 	errPendingBlockNumber  = errors.New("pending block number not supported")
 	errNegativeBlockNumber = errors.New("negative block number not supported")
+	errHeaderHashNotFound  = errors.New("header for hash not found")
+	errHeaderNotFound      = errors.New("header not found")
 )
 
 const (
@@ -201,9 +204,9 @@ func (b *Backend) GetTd(blockHash common.Hash) (*big.Int, error) {
 }
 
 // CurrentBlock returns the current block
-func (b *Backend) CurrentBlock() *types.Block {
-	block, _ := b.BlockByNumber(context.Background(), rpc.LatestBlockNumber)
-	return block
+func (b *Backend) CurrentBlock() (*types.Block, error) {
+	block, err := b.BlockByNumber(context.Background(), rpc.LatestBlockNumber)
+	return block, err
 }
 
 // BlockByNumberOrHash returns block by number or hash
@@ -263,12 +266,18 @@ func (b *Backend) BlockByNumber(ctx context.Context, blockNumber rpc.BlockNumber
 	// Get the canonical hash
 	canonicalHash, err := b.GetCanonicalHash(uint64(number))
 	if err != nil {
+		if err == sql.ErrNoRows {
+			return nil, nil
+		}
 		return nil, err
 	}
 	// Retrieve all the CIDs for the block
 	// TODO: optimize this by retrieving iplds directly rather than the cids first (this is remanent from when we fetched iplds through ipfs blockservice interface)
 	headerCID, uncleCIDs, txCIDs, rctCIDs, err := b.Retriever.RetrieveBlockByHash(canonicalHash)
 	if err != nil {
+		if err == sql.ErrNoRows {
+			return nil, nil
+		}
 		return nil, err
 	}
 
@@ -291,6 +300,9 @@ func (b *Backend) BlockByNumber(ctx context.Context, blockNumber rpc.BlockNumber
 	// Fetch and decode the header IPLD
 	headerIPLD, err := b.Fetcher.FetchHeader(tx, headerCID)
 	if err != nil {
+		if err == sql.ErrNoRows {
+			return nil, nil
+		}
 		return nil, err
 	}
 	var header types.Header
@@ -346,6 +358,9 @@ func (b *Backend) BlockByHash(ctx context.Context, hash common.Hash) (*types.Blo
 	// Retrieve all the CIDs for the block
 	headerCID, uncleCIDs, txCIDs, rctCIDs, err := b.Retriever.RetrieveBlockByHash(hash)
 	if err != nil {
+		if err == sql.ErrNoRows {
+			return nil, nil
+		}
 		return nil, err
 	}
 
@@ -368,6 +383,9 @@ func (b *Backend) BlockByHash(ctx context.Context, hash common.Hash) (*types.Blo
 	// Fetch and decode the header IPLD
 	headerIPLD, err := b.Fetcher.FetchHeader(tx, headerCID)
 	if err != nil {
+		if err == sql.ErrNoRows {
+			return nil, nil
+		}
 		return nil, err
 	}
 	var header types.Header
@@ -377,6 +395,9 @@ func (b *Backend) BlockByHash(ctx context.Context, hash common.Hash) (*types.Blo
 	// Fetch and decode the uncle IPLDs
 	uncleIPLDs, err := b.Fetcher.FetchUncles(tx, uncleCIDs)
 	if err != nil {
+		if err == sql.ErrNoRows {
+			return nil, nil
+		}
 		return nil, err
 	}
 	var uncles []*types.Header
@@ -390,6 +411,9 @@ func (b *Backend) BlockByHash(ctx context.Context, hash common.Hash) (*types.Blo
 	// Fetch and decode the transaction IPLDs
 	txIPLDs, err := b.Fetcher.FetchTrxs(tx, txCIDs)
 	if err != nil {
+		if err == sql.ErrNoRows {
+			return nil, nil
+		}
 		return nil, err
 	}
 	var transactions []*types.Transaction
@@ -403,6 +427,9 @@ func (b *Backend) BlockByHash(ctx context.Context, hash common.Hash) (*types.Blo
 	// Fetch and decode the receipt IPLDs
 	rctIPLDs, err := b.Fetcher.FetchRcts(tx, rctCIDs)
 	if err != nil {
+		if err == sql.ErrNoRows {
+			return nil, nil
+		}
 		return nil, err
 	}
 	var receipts []*types.Receipt
@@ -545,7 +572,7 @@ func (b *Backend) GetEVM(ctx context.Context, msg core.Message, state *state.Sta
 // GetAccountByNumberOrHash returns the account object for the provided address at the block corresponding to the provided number or hash
 func (b *Backend) GetAccountByNumberOrHash(ctx context.Context, address common.Address, blockNrOrHash rpc.BlockNumberOrHash) (*state.Account, error) {
 	if blockNr, ok := blockNrOrHash.Number(); ok {
-		return b.GetAccountByNumber(ctx, address, uint64(blockNr.Int64()))
+		return b.GetAccountByNumber(ctx, address, blockNr)
 	}
 	if hash, ok := blockNrOrHash.Hash(); ok {
 		return b.GetAccountByHash(ctx, address, hash)
@@ -554,23 +581,48 @@ func (b *Backend) GetAccountByNumberOrHash(ctx context.Context, address common.A
 }
 
 // GetAccountByNumber returns the account object for the provided address at the canonical block at the provided height
-func (b *Backend) GetAccountByNumber(ctx context.Context, address common.Address, number uint64) (*state.Account, error) {
-	hash, err := b.GetCanonicalHash(number)
-	if err != nil {
+func (b *Backend) GetAccountByNumber(ctx context.Context, address common.Address, blockNumber rpc.BlockNumber) (*state.Account, error) {
+	var err error
+	number := blockNumber.Int64()
+	if blockNumber == rpc.LatestBlockNumber {
+		number, err = b.Retriever.RetrieveLastBlockNumber()
+		if err != nil {
+			return nil, err
+		}
+	}
+	if blockNumber == rpc.EarliestBlockNumber {
+		number, err = b.Retriever.RetrieveFirstBlockNumber()
+		if err != nil {
+			return nil, err
+		}
+	}
+	if blockNumber == rpc.PendingBlockNumber {
+		return nil, errPendingBlockNumber
+	}
+	hash, err := b.GetCanonicalHash(uint64(number))
+	if err == sql.ErrNoRows {
+		return nil, errHeaderNotFound
+	} else if err != nil {
 		return nil, err
 	}
-	if hash == (common.Hash{}) {
-		return nil, fmt.Errorf("no canoncial block hash found for provided height (%d)", number)
-	}
+
 	return b.GetAccountByHash(ctx, address, hash)
 }
 
 // GetAccountByHash returns the account object for the provided address at the block with the provided hash
 func (b *Backend) GetAccountByHash(ctx context.Context, address common.Address, hash common.Hash) (*state.Account, error) {
+	_, err := b.HeaderByHash(context.Background(), hash)
+	if err == sql.ErrNoRows {
+		return nil, errHeaderHashNotFound
+	} else if err != nil {
+		return nil, err
+	}
+
 	_, accountRlp, err := b.IPLDRetriever.RetrieveAccountByAddressAndBlockHash(address, hash)
 	if err != nil {
 		return nil, err
 	}
+
 	acct := new(state.Account)
 	return acct, rlp.DecodeBytes(accountRlp, acct)
 }
@@ -578,7 +630,7 @@ func (b *Backend) GetAccountByHash(ctx context.Context, address common.Address,
 // GetCodeByNumberOrHash returns the byte code for the contract deployed at the provided address at the block with the provided hash or block number
 func (b *Backend) GetCodeByNumberOrHash(ctx context.Context, address common.Address, blockNrOrHash rpc.BlockNumberOrHash) ([]byte, error) {
 	if blockNr, ok := blockNrOrHash.Number(); ok {
-		return b.GetCodeByNumber(ctx, address, uint64(blockNr.Int64()))
+		return b.GetCodeByNumber(ctx, address, blockNr)
 	}
 	if hash, ok := blockNrOrHash.Hash(); ok {
 		return b.GetCodeByHash(ctx, address, hash)
@@ -587,8 +639,25 @@ func (b *Backend) GetCodeByNumberOrHash(ctx context.Context, address common.Addr
 }
 
 // GetCodeByNumber returns the byte code for the contract deployed at the provided address at the canonical block with the provided block number
-func (b *Backend) GetCodeByNumber(ctx context.Context, address common.Address, number uint64) ([]byte, error) {
-	hash, err := b.GetCanonicalHash(number)
+func (b *Backend) GetCodeByNumber(ctx context.Context, address common.Address, blockNumber rpc.BlockNumber) ([]byte, error) {
+	var err error
+	number := blockNumber.Int64()
+	if blockNumber == rpc.LatestBlockNumber {
+		number, err = b.Retriever.RetrieveLastBlockNumber()
+		if err != nil {
+			return nil, err
+		}
+	}
+	if blockNumber == rpc.EarliestBlockNumber {
+		number, err = b.Retriever.RetrieveFirstBlockNumber()
+		if err != nil {
+			return nil, err
+		}
+	}
+	if blockNumber == rpc.PendingBlockNumber {
+		return nil, errPendingBlockNumber
+	}
+	hash, err := b.GetCanonicalHash(uint64(number))
 	if err != nil {
 		return nil, err
 	}
@@ -630,31 +699,55 @@ func (b *Backend) GetCodeByHash(ctx context.Context, address common.Address, has
 }
 
 // GetStorageByNumberOrHash returns the storage value for the provided contract address an storage key at the block corresponding to the provided number or hash
-func (b *Backend) GetStorageByNumberOrHash(ctx context.Context, address common.Address, storageLeafKey common.Hash, blockNrOrHash rpc.BlockNumberOrHash) (hexutil.Bytes, error) {
+func (b *Backend) GetStorageByNumberOrHash(ctx context.Context, address common.Address, key common.Hash, blockNrOrHash rpc.BlockNumberOrHash) (hexutil.Bytes, error) {
 	if blockNr, ok := blockNrOrHash.Number(); ok {
-		return b.GetStorageByNumber(ctx, address, storageLeafKey, uint64(blockNr.Int64()))
+		return b.GetStorageByNumber(ctx, address, key, blockNr)
 	}
 	if hash, ok := blockNrOrHash.Hash(); ok {
-		return b.GetStorageByHash(ctx, address, storageLeafKey, hash)
+		return b.GetStorageByHash(ctx, address, key, hash)
 	}
 	return nil, errors.New("invalid arguments; neither block nor hash specified")
 }
 
 // GetStorageByNumber returns the storage value for the provided contract address an storage key at the block corresponding to the provided number
-func (b *Backend) GetStorageByNumber(ctx context.Context, address common.Address, storageLeafKey common.Hash, number uint64) (hexutil.Bytes, error) {
-	hash, err := b.GetCanonicalHash(number)
-	if err != nil {
+func (b *Backend) GetStorageByNumber(ctx context.Context, address common.Address, key common.Hash, blockNumber rpc.BlockNumber) (hexutil.Bytes, error) {
+	var err error
+	number := blockNumber.Int64()
+	if blockNumber == rpc.LatestBlockNumber {
+		number, err = b.Retriever.RetrieveLastBlockNumber()
+		if err != nil {
+			return nil, err
+		}
+	}
+	if blockNumber == rpc.EarliestBlockNumber {
+		number, err = b.Retriever.RetrieveFirstBlockNumber()
+		if err != nil {
+			return nil, err
+		}
+	}
+	if blockNumber == rpc.PendingBlockNumber {
+		return nil, errPendingBlockNumber
+	}
+	hash, err := b.GetCanonicalHash(uint64(number))
+	if err == sql.ErrNoRows {
+		return nil, errHeaderNotFound
+	} else if err != nil {
 		return nil, err
 	}
-	if hash == (common.Hash{}) {
-		return nil, fmt.Errorf("no canoncial block hash found for provided height (%d)", number)
-	}
-	return b.GetStorageByHash(ctx, address, storageLeafKey, hash)
+
+	return b.GetStorageByHash(ctx, address, key, hash)
 }
 
 // GetStorageByHash returns the storage value for the provided contract address an storage key at the block corresponding to the provided hash
-func (b *Backend) GetStorageByHash(ctx context.Context, address common.Address, storageLeafKey, hash common.Hash) (hexutil.Bytes, error) {
-	_, storageRlp, err := b.IPLDRetriever.RetrieveStorageAtByAddressAndStorageKeyAndBlockHash(address, storageLeafKey, hash)
+func (b *Backend) GetStorageByHash(ctx context.Context, address common.Address, key, hash common.Hash) (hexutil.Bytes, error) {
+	_, err := b.HeaderByHash(context.Background(), hash)
+	if err == sql.ErrNoRows {
+		return nil, errHeaderHashNotFound
+	} else if err != nil {
+		return nil, err
+	}
+
+	_, storageRlp, err := b.IPLDRetriever.RetrieveStorageAtByAddressAndStorageSlotAndBlockHash(address, key, hash)
 	return storageRlp, err
 }
 

pkg/eth/backend_utils.go

@@ -23,12 +23,12 @@ import (
 	"math/big"
 
 	"github.com/ethereum/go-ethereum"
-	"github.com/ethereum/go-ethereum/rpc"
-
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/params"
 	"github.com/ethereum/go-ethereum/rlp"
+	"github.com/ethereum/go-ethereum/rpc"
 
 	"github.com/vulcanize/ipld-eth-indexer/pkg/ipfs"
 )
@@ -244,23 +244,91 @@ func newRPCTransactionFromBlockIndex(b *types.Block, index uint64) *RPCTransacti
 }
 
 // extractLogsOfInterest returns logs from the receipt IPLD
-func extractLogsOfInterest(rctIPLDs []ipfs.BlockModel, wantedTopics [][]string) ([]*types.Log, error) {
-	var logs []*types.Log
-	for _, rctIPLD := range rctIPLDs {
-		rctRLP := rctIPLD
-		var rct types.Receipt
-		if err := rlp.DecodeBytes(rctRLP.Data, &rct); err != nil {
+func extractLogsOfInterest(config *params.ChainConfig, blockHash common.Hash, blockNumber uint64,
+	txs types.Transactions, rctIPLDs []ipfs.BlockModel, filter ReceiptFilter) ([]*types.Log, error) {
+	receipts := make(types.Receipts, len(rctIPLDs))
+
+	for i, rctBytes := range rctIPLDs {
+		rct := new(types.Receipt)
+		if err := rlp.DecodeBytes(rctBytes.Data, rct); err != nil {
 			return nil, err
 		}
-		for _, log := range rct.Logs {
-			if wanted := wantedLog(wantedTopics, log.Topics); wanted == true {
-				logs = append(logs, log)
-			}
+		receipts[i] = rct
+	}
+
+	err := receipts.DeriveFields(config, blockHash, blockNumber, txs)
+	if err != nil {
+		return nil, err
+	}
+
+	var unfilteredLogs []*types.Log
+	for _, receipt := range receipts {
+		unfilteredLogs = append(unfilteredLogs, receipt.Logs...)
+	}
+
+	adders := make([]common.Address, len(filter.LogAddresses))
+	for i, addr := range filter.LogAddresses {
+		adders[i] = common.HexToAddress(addr)
+	}
+
+	topics := make([][]common.Hash, len(filter.Topics))
+	for i, v := range filter.Topics {
+		topics[i] = make([]common.Hash, len(v))
+		for j, topic := range v {
+			topics[i][j] = common.HexToHash(topic)
 		}
 	}
+
+	logs := filterLogs(unfilteredLogs, nil, nil, adders, topics)
 	return logs, nil
 }
 
+func includes(addresses []common.Address, a common.Address) bool {
+	for _, addr := range addresses {
+		if addr == a {
+			return true
+		}
+	}
+
+	return false
+}
+
+// filterLogs creates a slice of logs matching the given criteria.
+func filterLogs(logs []*types.Log, fromBlock, toBlock *big.Int, addresses []common.Address, topics [][]common.Hash) []*types.Log {
+	var ret []*types.Log
+Logs:
+	for _, log := range logs {
+		if fromBlock != nil && fromBlock.Int64() >= 0 && fromBlock.Uint64() > log.BlockNumber {
+			continue
+		}
+		if toBlock != nil && toBlock.Int64() >= 0 && toBlock.Uint64() < log.BlockNumber {
+			continue
+		}
+
+		if len(addresses) > 0 && !includes(addresses, log.Address) {
+			continue
+		}
+		// If the to filtered topics is greater than the amount of topics in logs, skip.
+		if len(topics) > len(log.Topics) {
+			continue
+		}
+		for i, sub := range topics {
+			match := len(sub) == 0 // empty rule set == wildcard
+			for _, topic := range sub {
+				if log.Topics[i] == topic {
+					match = true
+					break
+				}
+			}
+			if !match {
+				continue Logs
+			}
+		}
+		ret = append(ret, log)
+	}
+	return ret
+}
+
 // returns true if the log matches on the filter
 func wantedLog(wantedTopics [][]string, actualTopics []common.Hash) bool {
 	// actualTopics will always have length <= 4

pkg/eth/cid_retriever.go

@@ -310,6 +310,14 @@ func (ecr *CIDRetriever) RetrieveRctCIDs(tx *sqlx.Tx, rctFilter ReceiptFilter, b
 		args = append(args, blockHash.String())
 		id++
 	}
+
+	// TODO: Add the below filters when we have log index in DB.
+	if true {
+		pgStr += ` ORDER BY transaction_cids.index`
+		receiptCids := make([]eth.ReceiptModel, 0)
+		return receiptCids, tx.Select(&receiptCids, pgStr, args...)
+	}
+
 	if len(rctFilter.LogAddresses) > 0 {
 		// Filter on log contract addresses if there are any
 		pgStr += fmt.Sprintf(` AND ((receipt_cids.log_contracts && $%d::VARCHAR(66)[]`, id)
@@ -371,6 +379,7 @@ func (ecr *CIDRetriever) RetrieveRctCIDs(tx *sqlx.Tx, rctFilter ReceiptFilter, b
 			args = append(args, pq.Array(trxIds))
 		}
 	}
+
 	pgStr += ` ORDER BY transaction_cids.index`
 	receiptCids := make([]eth.ReceiptModel, 0)
 	return receiptCids, tx.Select(&receiptCids, pgStr, args...)

pkg/eth/cid_retriever_test.go

@@ -237,6 +237,7 @@ var _ = Describe("Retriever", func() {
 			Expect(empty).ToNot(BeTrue())
 			Expect(len(cids)).To(Equal(1))
 			Expect(cids[0].BlockNumber).To(Equal(test_helpers.MockCIDWrapper.BlockNumber))
+
 			expectedHeaderCID := test_helpers.MockCIDWrapper.Header
 			expectedHeaderCID.ID = cids[0].Header.ID
 			expectedHeaderCID.NodeID = cids[0].Header.NodeID
@@ -250,6 +251,7 @@ var _ = Describe("Retriever", func() {
 			Expect(eth.ReceiptModelsContainsCID(cids[0].Receipts, test_helpers.MockCIDWrapper.Receipts[1].CID)).To(BeTrue())
 			Expect(eth.ReceiptModelsContainsCID(cids[0].Receipts, test_helpers.MockCIDWrapper.Receipts[2].CID)).To(BeTrue())
 			Expect(len(cids[0].StateNodes)).To(Equal(2))
+
 			for _, stateNode := range cids[0].StateNodes {
 				if stateNode.CID == test_helpers.State1CID.String() {
 					Expect(stateNode.StateKey).To(Equal(common.BytesToHash(test_helpers.ContractLeafKey).Hex()))

pkg/eth/eth_state_test.go

@@ -38,7 +38,6 @@ import (
 	eth2 "github.com/vulcanize/ipld-eth-indexer/pkg/eth"
 	"github.com/vulcanize/ipld-eth-indexer/pkg/postgres"
 	"github.com/vulcanize/ipld-eth-indexer/pkg/shared"
-
 	"github.com/vulcanize/ipld-eth-server/pkg/eth"
 	"github.com/vulcanize/ipld-eth-server/pkg/eth/test_helpers"
 )
@@ -60,6 +59,7 @@ func init() {
 }
 
 var _ = Describe("eth state reading tests", func() {
+	const chainLength = 5
 	var (
 		blocks                  []*types.Block
 		receipts                []types.Receipts
@@ -80,13 +80,13 @@ var _ = Describe("eth state reading tests", func() {
 		backend, err = eth.NewEthBackend(db, &eth.Config{
 			ChainConfig: chainConfig,
 			VmConfig:    vm.Config{},
-			RPCGasCap:   big.NewInt(10000000000),
+			RPCGasCap:   big.NewInt(10000000000), // Max gas capacity for a rpc call.
 		})
 		Expect(err).ToNot(HaveOccurred())
 		api = eth.NewPublicEthAPI(backend, nil, false)
 
 		// make the test blockchain (and state)
-		blocks, receipts, chain = test_helpers.MakeChain(5, test_helpers.Genesis, test_helpers.TestChainGen)
+		blocks, receipts, chain = test_helpers.MakeChain(chainLength, test_helpers.Genesis, test_helpers.TestChainGen)
 		params := statediff.Params{
 			IntermediateStateNodes:   true,
 			IntermediateStorageNodes: true,
@@ -234,12 +234,15 @@ var _ = Describe("eth state reading tests", func() {
 			bal, err = api.GetBalance(ctx, test_helpers.Account1Addr, rpc.BlockNumberOrHashWithNumber(1))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedAcct1BalanceBlock1))
-			_, err = api.GetBalance(ctx, test_helpers.Account2Addr, rpc.BlockNumberOrHashWithNumber(1))
-			Expect(err).To(HaveOccurred())
-			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
-			_, err = api.GetBalance(ctx, test_helpers.ContractAddr, rpc.BlockNumberOrHashWithNumber(1))
-			Expect(err).To(HaveOccurred())
-			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+
+			bal, err = api.GetBalance(ctx, test_helpers.Account2Addr, rpc.BlockNumberOrHashWithNumber(1))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(bal).To(Equal((*hexutil.Big)(common.Big0)))
+
+			bal, err = api.GetBalance(ctx, test_helpers.ContractAddr, rpc.BlockNumberOrHashWithNumber(1))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(bal).To(Equal((*hexutil.Big)(common.Big0)))
+
 			bal, err = api.GetBalance(ctx, test_helpers.TestBankAddress, rpc.BlockNumberOrHashWithNumber(1))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedBankBalanceBlock1))
@@ -247,12 +250,15 @@ var _ = Describe("eth state reading tests", func() {
 			bal, err = api.GetBalance(ctx, test_helpers.Account1Addr, rpc.BlockNumberOrHashWithNumber(2))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedAcct1BalanceBlock1))
+
 			bal, err = api.GetBalance(ctx, test_helpers.Account2Addr, rpc.BlockNumberOrHashWithNumber(2))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedAcct2BalanceBlock2))
+
 			bal, err = api.GetBalance(ctx, test_helpers.ContractAddr, rpc.BlockNumberOrHashWithNumber(2))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedContractBalance))
+
 			bal, err = api.GetBalance(ctx, test_helpers.TestBankAddress, rpc.BlockNumberOrHashWithNumber(2))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedBankBalanceBlock2))
@@ -260,12 +266,15 @@ var _ = Describe("eth state reading tests", func() {
 			bal, err = api.GetBalance(ctx, test_helpers.Account1Addr, rpc.BlockNumberOrHashWithNumber(3))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedAcct1BalanceBlock1))
+
 			bal, err = api.GetBalance(ctx, test_helpers.Account2Addr, rpc.BlockNumberOrHashWithNumber(3))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedAcct2BalanceBlock3))
+
 			bal, err = api.GetBalance(ctx, test_helpers.ContractAddr, rpc.BlockNumberOrHashWithNumber(3))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedContractBalance))
+
 			bal, err = api.GetBalance(ctx, test_helpers.TestBankAddress, rpc.BlockNumberOrHashWithNumber(3))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedBankBalanceBlock2))
@@ -273,12 +282,15 @@ var _ = Describe("eth state reading tests", func() {
 			bal, err = api.GetBalance(ctx, test_helpers.Account1Addr, rpc.BlockNumberOrHashWithNumber(4))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedAcct1BalanceBlock1))
+
 			bal, err = api.GetBalance(ctx, test_helpers.Account2Addr, rpc.BlockNumberOrHashWithNumber(4))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedAcct2BalanceBlock4))
+
 			bal, err = api.GetBalance(ctx, test_helpers.ContractAddr, rpc.BlockNumberOrHashWithNumber(4))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedContractBalance))
+
 			bal, err = api.GetBalance(ctx, test_helpers.TestBankAddress, rpc.BlockNumberOrHashWithNumber(4))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedBankBalanceBlock2))
@@ -286,12 +298,15 @@ var _ = Describe("eth state reading tests", func() {
 			bal, err = api.GetBalance(ctx, test_helpers.Account1Addr, rpc.BlockNumberOrHashWithNumber(5))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedAcct1BalanceBlock5))
+
 			bal, err = api.GetBalance(ctx, test_helpers.Account2Addr, rpc.BlockNumberOrHashWithNumber(5))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedAcct2BalanceBlock4))
+
 			bal, err = api.GetBalance(ctx, test_helpers.ContractAddr, rpc.BlockNumberOrHashWithNumber(5))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedContractBalance))
+
 			bal, err = api.GetBalance(ctx, test_helpers.TestBankAddress, rpc.BlockNumberOrHashWithNumber(5))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedBankBalanceBlock2))
@@ -304,12 +319,15 @@ var _ = Describe("eth state reading tests", func() {
 			bal, err = api.GetBalance(ctx, test_helpers.Account1Addr, rpc.BlockNumberOrHashWithHash(blocks[1].Hash(), true))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedAcct1BalanceBlock1))
-			_, err = api.GetBalance(ctx, test_helpers.Account2Addr, rpc.BlockNumberOrHashWithHash(blocks[1].Hash(), true))
-			Expect(err).To(HaveOccurred())
-			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+
+			bal, err = api.GetBalance(ctx, test_helpers.Account2Addr, rpc.BlockNumberOrHashWithHash(blocks[1].Hash(), true))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(bal).To(Equal((*hexutil.Big)(common.Big0)))
+
 			_, err = api.GetBalance(ctx, test_helpers.ContractAddr, rpc.BlockNumberOrHashWithHash(blocks[1].Hash(), true))
-			Expect(err).To(HaveOccurred())
-			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(bal).To(Equal((*hexutil.Big)(common.Big0)))
+
 			bal, err = api.GetBalance(ctx, test_helpers.TestBankAddress, rpc.BlockNumberOrHashWithHash(blocks[1].Hash(), true))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedBankBalanceBlock1))
@@ -317,12 +335,15 @@ var _ = Describe("eth state reading tests", func() {
 			bal, err = api.GetBalance(ctx, test_helpers.Account1Addr, rpc.BlockNumberOrHashWithHash(blocks[2].Hash(), true))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedAcct1BalanceBlock1))
+
 			bal, err = api.GetBalance(ctx, test_helpers.Account2Addr, rpc.BlockNumberOrHashWithHash(blocks[2].Hash(), true))
 			Expect(err).ToNot(HaveOccurred())
+
 			Expect(bal).To(Equal(expectedAcct2BalanceBlock2))
 			bal, err = api.GetBalance(ctx, test_helpers.ContractAddr, rpc.BlockNumberOrHashWithHash(blocks[2].Hash(), true))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedContractBalance))
+
 			bal, err = api.GetBalance(ctx, test_helpers.TestBankAddress, rpc.BlockNumberOrHashWithHash(blocks[2].Hash(), true))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedBankBalanceBlock2))
@@ -330,12 +351,15 @@ var _ = Describe("eth state reading tests", func() {
 			bal, err = api.GetBalance(ctx, test_helpers.Account1Addr, rpc.BlockNumberOrHashWithHash(blocks[3].Hash(), true))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedAcct1BalanceBlock1))
+
 			bal, err = api.GetBalance(ctx, test_helpers.Account2Addr, rpc.BlockNumberOrHashWithHash(blocks[3].Hash(), true))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedAcct2BalanceBlock3))
+
 			bal, err = api.GetBalance(ctx, test_helpers.ContractAddr, rpc.BlockNumberOrHashWithHash(blocks[3].Hash(), true))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedContractBalance))
+
 			bal, err = api.GetBalance(ctx, test_helpers.TestBankAddress, rpc.BlockNumberOrHashWithHash(blocks[3].Hash(), true))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedBankBalanceBlock2))
@@ -343,12 +367,15 @@ var _ = Describe("eth state reading tests", func() {
 			bal, err = api.GetBalance(ctx, test_helpers.Account1Addr, rpc.BlockNumberOrHashWithHash(blocks[4].Hash(), true))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedAcct1BalanceBlock1))
+
 			bal, err = api.GetBalance(ctx, test_helpers.Account2Addr, rpc.BlockNumberOrHashWithHash(blocks[4].Hash(), true))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedAcct2BalanceBlock4))
+
 			bal, err = api.GetBalance(ctx, test_helpers.ContractAddr, rpc.BlockNumberOrHashWithHash(blocks[4].Hash(), true))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedContractBalance))
+
 			bal, err = api.GetBalance(ctx, test_helpers.TestBankAddress, rpc.BlockNumberOrHashWithHash(blocks[4].Hash(), true))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedBankBalanceBlock2))
@@ -356,37 +383,45 @@ var _ = Describe("eth state reading tests", func() {
 			bal, err = api.GetBalance(ctx, test_helpers.Account1Addr, rpc.BlockNumberOrHashWithHash(blocks[5].Hash(), true))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedAcct1BalanceBlock5))
+
 			bal, err = api.GetBalance(ctx, test_helpers.Account2Addr, rpc.BlockNumberOrHashWithHash(blocks[5].Hash(), true))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedAcct2BalanceBlock4))
+
 			bal, err = api.GetBalance(ctx, test_helpers.ContractAddr, rpc.BlockNumberOrHashWithHash(blocks[5].Hash(), true))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedContractBalance))
+
 			bal, err = api.GetBalance(ctx, test_helpers.TestBankAddress, rpc.BlockNumberOrHashWithHash(blocks[5].Hash(), true))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(bal).To(Equal(expectedBankBalanceBlock2))
 		})
-		It("Throws an error for an account it cannot find the balance for an account at the provided block number", func() {
-			_, err := api.GetBalance(ctx, test_helpers.Account1Addr, rpc.BlockNumberOrHashWithNumber(0))
-			Expect(err).To(HaveOccurred())
-			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
-			_, err = api.GetBalance(ctx, test_helpers.Account2Addr, rpc.BlockNumberOrHashWithNumber(0))
-			Expect(err).To(HaveOccurred())
-			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
-			_, err = api.GetBalance(ctx, test_helpers.ContractAddr, rpc.BlockNumberOrHashWithNumber(0))
-			Expect(err).To(HaveOccurred())
-			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+		It("Returns `0` for an account it cannot find the balance for an account at the provided block number", func() {
+			bal, err := api.GetBalance(ctx, test_helpers.Account1Addr, rpc.BlockNumberOrHashWithNumber(0))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(bal).To(Equal((*hexutil.Big)(common.Big0)))
+
+			bal, err = api.GetBalance(ctx, test_helpers.Account2Addr, rpc.BlockNumberOrHashWithNumber(0))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(bal).To(Equal((*hexutil.Big)(common.Big0)))
+
+			bal, err = api.GetBalance(ctx, test_helpers.ContractAddr, rpc.BlockNumberOrHashWithNumber(0))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(bal).To(Equal((*hexutil.Big)(common.Big0)))
 		})
-		It("Throws an error for an account it cannot find the balance for an account at the provided block hash", func() {
-			_, err := api.GetBalance(ctx, test_helpers.Account1Addr, rpc.BlockNumberOrHashWithHash(blocks[0].Hash(), true))
-			Expect(err).To(HaveOccurred())
-			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
-			_, err = api.GetBalance(ctx, test_helpers.Account2Addr, rpc.BlockNumberOrHashWithHash(blocks[0].Hash(), true))
-			Expect(err).To(HaveOccurred())
-			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
-			_, err = api.GetBalance(ctx, test_helpers.ContractAddr, rpc.BlockNumberOrHashWithHash(blocks[0].Hash(), true))
-			Expect(err).To(HaveOccurred())
-			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+		It("Returns `0` for an error for an account it cannot find the balance for an account at the provided block hash", func() {
+			bal, err := api.GetBalance(ctx, test_helpers.Account1Addr, rpc.BlockNumberOrHashWithHash(blocks[0].Hash(), true))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(bal).To(Equal((*hexutil.Big)(common.Big0)))
+
+			bal, err = api.GetBalance(ctx, test_helpers.Account2Addr, rpc.BlockNumberOrHashWithHash(blocks[0].Hash(), true))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(bal).To(Equal((*hexutil.Big)(common.Big0)))
+
+			bal, err = api.GetBalance(ctx, test_helpers.ContractAddr, rpc.BlockNumberOrHashWithHash(blocks[0].Hash(), true))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(bal).To(Equal((*hexutil.Big)(common.Big0)))
+
 		})
 	})
 
@@ -409,52 +444,64 @@ var _ = Describe("eth state reading tests", func() {
 			Expect(err).ToNot(HaveOccurred())
 			Expect(code).To(Equal((hexutil.Bytes)(test_helpers.ContractCode)))
 		})
-		It("Throws an error for an account it cannot find the code for", func() {
-			_, err := api.GetCode(ctx, randomAddr, rpc.BlockNumberOrHashWithHash(blocks[3].Hash(), true))
-			Expect(err).To(HaveOccurred())
+		It("Returns `nil` for an account it cannot find the code for", func() {
+			code, err := api.GetCode(ctx, randomAddr, rpc.BlockNumberOrHashWithHash(blocks[3].Hash(), true))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(code).To(BeEmpty())
 		})
-		It("Throws an error for a contract that doesn't exist at this hieght", func() {
-			_, err := api.GetCode(ctx, test_helpers.ContractAddr, rpc.BlockNumberOrHashWithNumber(0))
-			Expect(err).To(HaveOccurred())
+		It("Returns `nil`  for a contract that doesn't exist at this height", func() {
+			code, err := api.GetCode(ctx, test_helpers.ContractAddr, rpc.BlockNumberOrHashWithNumber(0))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(code).To(BeEmpty())
 		})
 	})
 
 	Describe("eth_getStorageAt", func() {
-		It("Throws an error if it tries to access a contract which does not exist", func() {
-			_, err := api.GetStorageAt(ctx, test_helpers.ContractAddr, test_helpers.ContractSlotKeyHash.Hex(), rpc.BlockNumberOrHashWithNumber(0))
-			Expect(err).To(HaveOccurred())
-			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+		It("Returns empty slice if it tries to access a contract which does not exist", func() {
+			storage, err := api.GetStorageAt(ctx, test_helpers.ContractAddr, test_helpers.ContractSlotKeyHash.Hex(), rpc.BlockNumberOrHashWithNumber(0))
+			Expect(err).NotTo(HaveOccurred())
+			Expect(storage).To(Equal(hexutil.Bytes(make([]byte, 32))))
 
-			_, err = api.GetStorageAt(ctx, test_helpers.ContractAddr, test_helpers.ContractSlotKeyHash.Hex(), rpc.BlockNumberOrHashWithNumber(1))
-			Expect(err).To(HaveOccurred())
-			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+			storage, err = api.GetStorageAt(ctx, test_helpers.ContractAddr, test_helpers.ContractSlotKeyHash.Hex(), rpc.BlockNumberOrHashWithNumber(1))
+			Expect(err).NotTo(HaveOccurred())
+			Expect(storage).To(Equal(hexutil.Bytes(make([]byte, 32))))
 		})
-		It("Throws an error if it tries to access a contract slot which does not exist", func() {
-			_, err := api.GetStorageAt(ctx, test_helpers.ContractAddr, randomHash.Hex(), rpc.BlockNumberOrHashWithNumber(2))
-			Expect(err).To(HaveOccurred())
-			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+		It("Returns empty slice if it tries to access a contract slot which does not exist", func() {
+			storage, err := api.GetStorageAt(ctx, test_helpers.ContractAddr, randomHash.Hex(), rpc.BlockNumberOrHashWithNumber(2))
+			Expect(err).NotTo(HaveOccurred())
+			Expect(storage).To(Equal(hexutil.Bytes(make([]byte, 32))))
 		})
 		It("Retrieves the storage value at the provided contract address and storage leaf key at the block with the provided hash or number", func() {
 			// After deployment
-			val, err := api.GetStorageAt(ctx, test_helpers.ContractAddr, test_helpers.ContractSlotKeyHash.Hex(), rpc.BlockNumberOrHashWithNumber(2))
+			val, err := api.GetStorageAt(ctx, test_helpers.ContractAddr, test_helpers.IndexOne, rpc.BlockNumberOrHashWithNumber(2))
 			Expect(err).ToNot(HaveOccurred())
-			expectedRes := hexutil.Bytes(common.Hex2Bytes("01"))
+			expectedRes := hexutil.Bytes(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000001"))
 			Expect(val).To(Equal(expectedRes))
 
-			val, err = api.GetStorageAt(ctx, test_helpers.ContractAddr, test_helpers.ContractSlotKeyHash.Hex(), rpc.BlockNumberOrHashWithNumber(3))
+			val, err = api.GetStorageAt(ctx, test_helpers.ContractAddr, test_helpers.IndexOne, rpc.BlockNumberOrHashWithNumber(3))
 			Expect(err).ToNot(HaveOccurred())
-			expectedRes = hexutil.Bytes(common.Hex2Bytes("03"))
+			expectedRes = hexutil.Bytes(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000003"))
 			Expect(val).To(Equal(expectedRes))
 
-			val, err = api.GetStorageAt(ctx, test_helpers.ContractAddr, test_helpers.ContractSlotKeyHash.Hex(), rpc.BlockNumberOrHashWithNumber(4))
+			val, err = api.GetStorageAt(ctx, test_helpers.ContractAddr, test_helpers.IndexOne, rpc.BlockNumberOrHashWithNumber(4))
 			Expect(err).ToNot(HaveOccurred())
-			expectedRes = hexutil.Bytes(common.Hex2Bytes("09"))
+			expectedRes = hexutil.Bytes(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000009"))
 			Expect(val).To(Equal(expectedRes))
 
-			val, err = api.GetStorageAt(ctx, test_helpers.ContractAddr, test_helpers.ContractSlotKeyHash.Hex(), rpc.BlockNumberOrHashWithNumber(5))
+			val, err = api.GetStorageAt(ctx, test_helpers.ContractAddr, test_helpers.IndexOne, rpc.BlockNumberOrHashWithNumber(5))
 			Expect(err).ToNot(HaveOccurred())
 			Expect(val).To(Equal(hexutil.Bytes{}))
 		})
+		It("Throws an error for a non-existing block hash", func() {
+			_, err := api.GetStorageAt(ctx, test_helpers.ContractAddr, test_helpers.IndexOne, rpc.BlockNumberOrHashWithHash(randomHash, true))
+			Expect(err).To(HaveOccurred())
+			Expect(err).To(MatchError("header for hash not found"))
+		})
+		It("Throws an error for a non-existing block number", func() {
+			_, err := api.GetStorageAt(ctx, test_helpers.ContractAddr, test_helpers.IndexOne, rpc.BlockNumberOrHashWithNumber(chainLength+1))
+			Expect(err).To(HaveOccurred())
+			Expect(err).To(MatchError("header not found"))
+		})
 	})
 
 	Describe("eth_getHeaderByNumber", func() {

pkg/eth/ipld_retriever.go

@@ -428,11 +428,12 @@ func (r *IPLDRetriever) RetrieveAccountByAddressAndBlockNumber(address common.Ad
 	return accountResult.CID, i[1].([]byte), nil
 }
 
-// RetrieveStorageAtByAddressAndStorageKeyAndBlockHash returns the cid and rlp bytes for the storage value corresponding to the provided address, storage key, and block hash
-func (r *IPLDRetriever) RetrieveStorageAtByAddressAndStorageKeyAndBlockHash(address common.Address, storageLeafKey, hash common.Hash) (string, []byte, error) {
+// RetrieveStorageAtByAddressAndStorageSlotAndBlockHash returns the cid and rlp bytes for the storage value corresponding to the provided address, storage slot, and block hash
+func (r *IPLDRetriever) RetrieveStorageAtByAddressAndStorageSlotAndBlockHash(address common.Address, key, hash common.Hash) (string, []byte, error) {
 	storageResult := new(nodeInfo)
 	stateLeafKey := crypto.Keccak256Hash(address.Bytes())
-	if err := r.db.Get(storageResult, RetrieveStorageLeafByAddressHashAndLeafKeyAndBlockHashPgStr, stateLeafKey.Hex(), storageLeafKey.Hex(), hash.Hex()); err != nil {
+	storageHash := crypto.Keccak256Hash(key.Bytes())
+	if err := r.db.Get(storageResult, RetrieveStorageLeafByAddressHashAndLeafKeyAndBlockHashPgStr, stateLeafKey.Hex(), storageHash.Hex(), hash.Hex()); err != nil {
 		return "", nil, err
 	}
 	if storageResult.Removed {

pkg/eth/test_helpers/test_data.go

@@ -34,7 +34,7 @@ import (
 	"github.com/ethereum/go-ethereum/params"
 	"github.com/ethereum/go-ethereum/rlp"
 	"github.com/ethereum/go-ethereum/statediff/testhelpers"
-	"github.com/ipfs/go-block-format"
+	blocks "github.com/ipfs/go-block-format"
 	"github.com/multiformats/go-multihash"
 	log "github.com/sirupsen/logrus"
 
@@ -80,7 +80,7 @@ var (
 		},
 	}
 	ReceiptsRlp, _   = rlp.EncodeToBytes(MockReceipts)
-	MockBlock        = types.NewBlock(&MockHeader, MockTransactions, MockUncles, MockReceipts, new(trie.Trie))
+	MockBlock        = createNewBlock(&MockHeader, MockTransactions, MockUncles, MockReceipts, new(trie.Trie))
 	MockHeaderRlp, _ = rlp.EncodeToBytes(MockBlock.Header())
 	MockChildHeader  = types.Header{
 		Time:        0,
@@ -104,15 +104,22 @@ var (
 	mockTopic21          = common.HexToHash("0x05")
 	mockTopic22          = common.HexToHash("0x07")
 	MockLog1             = &types.Log{
-		Address: Address,
-		Topics:  []common.Hash{mockTopic11, mockTopic12},
-		Data:    []byte{},
+		Address:     Address,
+		Topics:      []common.Hash{mockTopic11, mockTopic12},
+		Data:        []byte{},
+		BlockNumber: BlockNumber.Uint64(),
+		TxIndex:     0,
+		Index:       0,
 	}
 	MockLog2 = &types.Log{
-		Address: AnotherAddress,
-		Topics:  []common.Hash{mockTopic21, mockTopic22},
-		Data:    []byte{},
+		Address:     AnotherAddress,
+		Topics:      []common.Hash{mockTopic21, mockTopic22},
+		Data:        []byte{},
+		BlockNumber: BlockNumber.Uint64(),
+		TxIndex:     1,
+		Index:       1,
 	}
+
 	HeaderCID, _  = ipld.RawdataToCid(ipld.MEthHeader, MockHeaderRlp, multihash.KECCAK_256)
 	HeaderMhKey   = shared.MultihashKeyFromCID(HeaderCID)
 	Trx1CID, _    = ipld.RawdataToCid(ipld.MEthTx, MockTransactions.GetRlp(0), multihash.KECCAK_256)
@@ -375,6 +382,8 @@ var (
 		StateNodes:      MockStateNodes,
 	}
 
+	Reward = eth.CalcEthBlockReward(MockBlock.Header(), MockBlock.Uncles(), MockBlock.Transactions(), MockReceipts)
+
 	MockCIDWrapper = &eth2.CIDWrapper{
 		BlockNumber: new(big.Int).Set(BlockNumber),
 		Header: eth.HeaderModel{
@@ -384,7 +393,7 @@ var (
 			CID:             HeaderCID.String(),
 			MhKey:           HeaderMhKey,
 			TotalDifficulty: MockBlock.Difficulty().String(),
-			Reward:          "5312500000000000000",
+			Reward:          Reward.String(),
 			StateRoot:       MockBlock.Root().String(),
 			RctRoot:         MockBlock.ReceiptHash().String(),
 			TxRoot:          MockBlock.TxHash().String(),
@@ -489,6 +498,17 @@ var (
 	}
 )
 
+func createNewBlock(header *types.Header, txs []*types.Transaction, uncles []*types.Header, receipts []*types.Receipt, hasher types.Hasher) *types.Block {
+	block := types.NewBlock(header, txs, uncles, receipts, hasher)
+	bHash := block.Hash()
+	for _, r := range receipts {
+		for _, l := range r.Logs {
+			l.BlockHash = bHash
+		}
+	}
+	return block
+}
+
 // createTransactionsAndReceipts is a helper function to generate signed mock transactions and mock receipts with mock logs
 func createTransactionsAndReceipts() (types.Transactions, types.Receipts, common.Address) {
 	// make transactions
@@ -519,13 +539,26 @@ func createTransactionsAndReceipts() (types.Transactions, types.Receipts, common
 	}
 	// make receipts
 	mockReceipt1 := types.NewReceipt(common.HexToHash("0x0").Bytes(), false, 50)
+
+	hash1 := signedTrx1.Hash()
+	MockLog1.TxHash = hash1
+
 	mockReceipt1.Logs = []*types.Log{MockLog1}
-	mockReceipt1.TxHash = signedTrx1.Hash()
+	mockReceipt1.TxHash = hash1
+	mockReceipt1.GasUsed = mockReceipt1.CumulativeGasUsed
+
 	mockReceipt2 := types.NewReceipt(common.HexToHash("0x1").Bytes(), false, 100)
+	hash2 := signedTrx2.Hash()
+	MockLog2.TxHash = hash2
+
 	mockReceipt2.Logs = []*types.Log{MockLog2}
-	mockReceipt2.TxHash = signedTrx2.Hash()
-	mockReceipt3 := types.NewReceipt(common.HexToHash("0x2").Bytes(), false, 75)
+	mockReceipt2.TxHash = hash2
+	mockReceipt2.GasUsed = mockReceipt2.CumulativeGasUsed - mockReceipt1.CumulativeGasUsed
+
+	mockReceipt3 := types.NewReceipt(common.HexToHash("0x2").Bytes(), false, 175)
 	mockReceipt3.Logs = []*types.Log{}
 	mockReceipt3.TxHash = signedTrx3.Hash()
+	mockReceipt3.GasUsed = mockReceipt3.CumulativeGasUsed - mockReceipt2.CumulativeGasUsed
+
 	return types.Transactions{signedTrx1, signedTrx2, signedTrx3}, types.Receipts{mockReceipt1, mockReceipt2, mockReceipt3}, SenderAddr
 }

pkg/graphql/graphql.go

@@ -867,7 +867,11 @@ func (r *Resolver) Blocks(ctx context.Context, args struct {
 	if args.To != nil {
 		to = rpc.BlockNumber(*args.To)
 	} else {
-		to = rpc.BlockNumber(r.backend.CurrentBlock().Number().Int64())
+		block, err := r.backend.CurrentBlock()
+		if err != nil {
+			return []*Block{}, nil
+		}
+		to = rpc.BlockNumber(block.Number().Int64())
 	}
 	if to < from {
 		return []*Block{}, nil

scripts/run_intregration_test.sh

@@ -0,0 +1,21 @@
+set -e
+set -o xtrace
+
+# Clear up existing docker images and volume.
+docker-compose down --remove-orphans --volumes
+
+# Build and start the containers.
+# Note: Build only if `ipld-eth-server` code is modified. Otherwise comment this line.
+docker build -t ipld-eth-server_eth-server:latest .
+docker-compose -f docker-compose.test.yml -f docker-compose.yml up -d db dapptools contract eth-server
+
+export PGPASSWORD=password
+export DATABASE_USER=vdbm
+export DATABASE_PORT=8077
+export DATABASE_PASSWORD=password
+export DATABASE_HOSTNAME=127.0.0.1
+
+# Wait for containers to be up and execute the integration test.
+while [ "$(curl -s -o /dev/null -w ''%{http_code}'' localhost:8081)" != "200" ]; do echo "waiting for ipld-eth-server..." && sleep 5; done && \
+          while [ "$(curl -s -o /dev/null -w ''%{http_code}'' localhost:8545)" != "200" ]; do echo "waiting for geth-statediff..." && sleep 5; done && \
+          make integrationtest

scripts/run_unit_test.sh

@@ -0,0 +1,2 @@
+docker-compose -f docker-compose.test.yml -f docker-compose.yml up -d db
+PGPASSWORD=password DATABASE_USER=vdbm DATABASE_PORT=8077 DATABASE_PASSWORD=password DATABASE_HOSTNAME=127.0.0.1 make test

test/README.md

@@ -0,0 +1,15 @@
+
+Spin up services: 
+```
+docker-compose -f docker-compose.test.yml -f docker-compose.yml up -d db dapptools contract eth-server
+```
+
+Running unit tests:
+```bash
+make test_local
+```
+
+Running integration test:
+```bash
+make integrationtest_local
+```

test/contract/.dockerignore

@@ -0,0 +1,3 @@
+node_modules
+artifacts
+cache

test/contract/.gitignore

@@ -0,0 +1,5 @@
+node_modules
+
+#Hardhat files
+cache
+artifacts

test/contract/Dockerfile

@@ -0,0 +1,14 @@
+FROM node:14
+
+ARG ETH_ADDR
+ENV ETH_ADDR $ETH_ADDR
+
+WORKDIR /usr/src/app
+COPY package*.json ./
+RUN npm ci
+COPY . .
+RUN npm run compile && ls -lah
+
+EXPOSE 3000
+
+ENTRYPOINT ["npm", "start"]

test/contract/contracts/GLDToken.sol

@@ -0,0 +1,7 @@
+pragma solidity ^0.8.0;
+import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
+contract GLDToken is ERC20 {
+    constructor() ERC20("Gold", "GLD") {
+        _mint(msg.sender, 1000000000000000000000);
+    }
+}

test/contract/hardhat.config.js

@@ -0,0 +1,32 @@
+require("@nomiclabs/hardhat-waffle");
+
+// This is a sample Hardhat task. To learn how to create your own go to
+// https://hardhat.org/guides/create-task.html
+task("accounts", "Prints the list of accounts", async () => {
+  const accounts = await ethers.getSigners();
+
+  for (const account of accounts) {
+    console.log(account.address);
+  }
+});
+
+// You need to export an object to set up your config
+// Go to https://hardhat.org/config/ to learn more
+
+/**
+ * @type import('hardhat/config').HardhatUserConfig
+ */
+module.exports = {
+  solidity: "0.8.0",
+  networks: {
+    local: {
+      url: 'http://127.0.0.1:8545',
+      chainId: 4
+    },
+    docker: {
+      url: process.env.ETH_ADDR,
+      chainId: 4
+    }
+  }
+};
+

test/contract/package.json

@@ -0,0 +1,27 @@
+{
+  "name": "contract",
+  "version": "1.0.0",
+  "main": "index.js",
+  "scripts": {
+    "compile": "npx hardhat compile",
+    "start": "HARDHAT_NETWORK=docker node src/index.js",
+    "start:local": "ETH_ADDR=http://127.0.0.1:8545 npm run start",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "description": "",
+  "dependencies": {
+    "@openzeppelin/contracts": "^4.0.0",
+    "fastify": "^3.14.2",
+    "hardhat": "^2.2.0"
+  },
+  "devDependencies": {
+    "@nomiclabs/hardhat-ethers": "^2.0.2",
+    "@nomiclabs/hardhat-waffle": "^2.0.1",
+    "chai": "^4.3.4",
+    "ethereum-waffle": "^3.3.0",
+    "ethers": "^5.1.0"
+  }
+}

test/contract/scripts/deploy.js

@@ -0,0 +1,18 @@
+const hre = require("hardhat");
+
+async function main() {
+    // await hre.run('compile');
+    // We get the contract to deploy
+    const GLDToken = await hre.ethers.getContractFactory("GLDToken");
+    const token = await GLDToken.deploy();
+    await token.deployed();
+    console.log("GLDToken deployed to:", token.address, token.deployTransaction.hash);
+}
+// We recommend this pattern to be able to use async/await everywhere
+// and properly handle errors.
+main()
+    .then(() => process.exit(0))
+    .catch(error => {
+        console.error(error);
+        process.exit(1);
+    });

test/contract/scripts/sample-script.js

@@ -0,0 +1,36 @@
+// We require the Hardhat Runtime Environment explicitly here. This is optional 
+// but useful for running the script in a standalone fashion through `node <script>`.
+//
+// When running the script with `hardhat run <script>` you'll find the Hardhat
+// Runtime Environment's members available in the global scope.
+const hre = require("hardhat");
+
+async function main() {
+  // Hardhat always runs the compile task when running scripts with its command
+  // line interface.
+  //
+  // If this script is run directly using `node` you may want to call compile 
+  // manually to make sure everything is compiled
+  // await hre.run('compile');
+
+  // We get the contract to deploy
+  const Greeter = await hre.ethers.getContractFactory("Greeter");
+  const greeter = await Greeter.deploy("Hello, Hardhat!");
+
+  await greeter.deployed();
+
+  console.log("Greeter deployed to:", greeter.address, "; tx hash: ", greeter.deployTransaction.hash);
+
+  const result = await greeter.setGreeting("Hello 123!");
+
+  console.log("Greeter updated", "; tx hash: ", result.hash, "; block hash: ", result.blockHash);
+}
+
+// We recommend this pattern to be able to use async/await everywhere
+// and properly handle errors.
+main()
+  .then(() => process.exit(0))
+  .catch(error => {
+    console.error(error);
+    process.exit(1);
+  });

test/contract/src/index.js

@@ -0,0 +1,60 @@
+const fastify = require('fastify')({ logger: true });
+const hre = require("hardhat");
+
+// readiness check
+fastify.get('/v1/healthz', async (req, reply) => {
+    reply
+        .code(200)
+        .header('Content-Type', 'application/json; charset=utf-8')
+        .send({ success: true })
+});
+
+fastify.get('/v1/deployContract', async (req, reply) => {
+    const GLDToken = await hre.ethers.getContractFactory("GLDToken");
+    const token = await GLDToken.deploy();
+    await token.deployed();
+
+    return {
+        address: token.address,
+        txHash: token.deployTransaction.hash,
+        blockNumber: token.deployTransaction.blockNumber,
+        blockHash: token.deployTransaction.blockHash,
+    }
+});
+
+fastify.get('/v1/sendEth', async (req, reply) => {
+    const to = req.query.to;
+    const value = req.query.value;
+
+    const [owner] = await hre.ethers.getSigners();
+    const tx = await owner.sendTransaction({
+        to,
+        value: hre.ethers.utils.parseEther(value)
+    });
+    await tx.wait(1)
+
+    // console.log(tx);
+    // const coinbaseBalance = await hre.ethers.provider.getBalance(owner.address);
+    // const receiverBalance = await hre.ethers.provider.getBalance(to);
+    // console.log(coinbaseBalance.toString(), receiverBalance.toString());
+
+    return {
+        from: tx.from,
+        to: tx.to,
+        //value: tx.value.toString(),
+        txHash: tx.hash,
+        blockNumber: tx.blockNumber,
+        blockHash: tx.blockHash,
+    }
+});
+
+async function main() {
+    try {
+        await fastify.listen(3000, '0.0.0.0');
+    } catch (err) {
+        fastify.log.error(err);
+        process.exit(1);
+    }
+}
+
+main();

test/contract/test/sample-test.js

@@ -0,0 +1,14 @@
+const { expect } = require("chai");
+
+describe("Greeter", function() {
+  it("Should return the new greeting once it's changed", async function() {
+    const Greeter = await ethers.getContractFactory("Greeter");
+    const greeter = await Greeter.deploy("Hello, world!");
+    
+    await greeter.deployed();
+    expect(await greeter.greet()).to.equal("Hello, world!");
+
+    await greeter.setGreeting("Hola, mundo!");
+    expect(await greeter.greet()).to.equal("Hola, mundo!");
+  });
+});

test/helper.go

@@ -0,0 +1,62 @@
+package integration
+
+import (
+	"encoding/json"
+	"fmt"
+	"math/big"
+	"net/http"
+)
+
+type ContractDeployed struct {
+	Address         string `json:"address"`
+	TransactionHash string `json:"txHash"`
+	BlockNumber     int    `json:"blockNumber"`
+	BlockHash       string `json:"blockHash"`
+}
+
+type Tx struct {
+	From            string   `json:"from"`
+	To              string   `json:"to"`
+	Value           *big.Int `json:"value"`
+	TransactionHash string   `json:"txHash"`
+	BlockNumber     int      `json:"blockNumber"`
+	BlockHash       string   `json:"blockHash"`
+}
+
+const srvUrl = "http://localhost:3000"
+
+func DeployContract() (*ContractDeployed, error) {
+	res, err := http.Get(fmt.Sprintf("%s/v1/deployContract", srvUrl))
+	if err != nil {
+		return nil, err
+	}
+	defer res.Body.Close()
+
+	var contract ContractDeployed
+
+	decoder := json.NewDecoder(res.Body)
+	err = decoder.Decode(&contract)
+	if err != nil {
+		return nil, err
+	}
+
+	return &contract, nil
+}
+
+func SendEth(to string, value string) (*Tx, error) {
+	res, err := http.Get(fmt.Sprintf("%s/v1/sendEth?to=%s&value=%s", srvUrl, to, value))
+	if err != nil {
+		return nil, err
+	}
+	defer res.Body.Close()
+
+	var tx Tx
+
+	decoder := json.NewDecoder(res.Body)
+	err = decoder.Decode(&tx)
+	if err != nil {
+		return nil, err
+	}
+
+	return &tx, nil
+}

test/integration_suite_test.go

@@ -0,0 +1,19 @@
+package integration_test
+
+import (
+	"github.com/sirupsen/logrus"
+	"io/ioutil"
+	"testing"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+func TestIntegration(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "integration test suite")
+}
+
+var _ = BeforeSuite(func() {
+	logrus.SetOutput(ioutil.Discard)
+})

test/integration_test.go

@@ -0,0 +1,486 @@
+package integration_test
+
+import (
+	"context"
+	"math/big"
+	"time"
+
+	"github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/ethereum/go-ethereum/rlp"
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+	integration "github.com/vulcanize/ipld-eth-server/test"
+
+	"github.com/ethereum/go-ethereum/ethclient"
+)
+
+const nonExistingBlockHash = "0x111111111111111111111111111111111111111111111111111111111111111"
+const nonExistingAddress = "0x1111111111111111111111111111111111111111"
+
+var (
+	randomAddr = common.HexToAddress("0x1C3ab14BBaD3D99F4203bd7a11aCB94882050E6f")
+	randomHash = crypto.Keccak256Hash(randomAddr.Bytes())
+)
+
+var _ = Describe("Integration test", func() {
+	gethHttpPath := "http://127.0.0.1:8545"
+	gethClient, err := ethclient.Dial(gethHttpPath)
+	Expect(err).ToNot(HaveOccurred())
+
+	ipldEthHttpPath := "http://127.0.0.1:8081"
+	ipldClient, err := ethclient.Dial(ipldEthHttpPath)
+	Expect(err).ToNot(HaveOccurred())
+
+	ctx := context.Background()
+
+	var contract *integration.ContractDeployed
+	var erc20TotalSupply *big.Int
+	var tx *integration.Tx
+	var bigIntResult bool
+	var contractErr error
+	var txErr error
+	sleepInterval := 2 * time.Second
+
+	Describe("get Block", func() {
+		BeforeEach(func() {
+			contract, contractErr = integration.DeployContract()
+			time.Sleep(sleepInterval)
+		})
+
+		It("get not existing block by number", func() {
+			Expect(contractErr).ToNot(HaveOccurred())
+
+			blockNum := contract.BlockNumber + 100
+
+			gethBlock, err := gethClient.BlockByNumber(ctx, big.NewInt(int64(blockNum)))
+			Expect(err).To(MatchError(ethereum.NotFound))
+			Expect(gethBlock).To(BeZero())
+
+			ipldBlock, err := ipldClient.BlockByNumber(ctx, big.NewInt(int64(blockNum)))
+			Expect(err).To(MatchError(ethereum.NotFound))
+			Expect(ipldBlock).To(BeZero())
+		})
+
+		It("get not existing block by hash", func() {
+			gethBlock, err := gethClient.BlockByHash(ctx, common.HexToHash(nonExistingBlockHash))
+			Expect(err).To(MatchError(ethereum.NotFound))
+			Expect(gethBlock).To(BeZero())
+
+			ipldBlock, err := ipldClient.BlockByHash(ctx, common.HexToHash(nonExistingBlockHash))
+			Expect(err).To(MatchError(ethereum.NotFound))
+			Expect(ipldBlock).To(BeZero())
+		})
+
+		It("get block by number", func() {
+			Expect(contractErr).ToNot(HaveOccurred())
+
+			blockNum := contract.BlockNumber
+
+			gethBlock, err := gethClient.BlockByNumber(ctx, big.NewInt(int64(blockNum)))
+			Expect(err).ToNot(HaveOccurred())
+
+			ipldBlock, err := ipldClient.BlockByNumber(ctx, big.NewInt(int64(blockNum)))
+			Expect(err).ToNot(HaveOccurred())
+
+			// check headers are equals
+			Expect(gethBlock.Header()).To(Equal(ipldBlock.Header()))
+
+			gethTxs := gethBlock.Transactions()
+			ipldTxs := ipldBlock.Transactions()
+
+			Expect(gethTxs.Len()).To(Equal(ipldTxs.Len()))
+			Expect(types.TxDifference(gethTxs, ipldTxs).Len()).To(Equal(0))
+		})
+
+		It("get block by hash", func() {
+			gethBlock, err := gethClient.BlockByHash(ctx, common.HexToHash(contract.BlockHash))
+			Expect(err).ToNot(HaveOccurred())
+
+			ipldBlock, err := ipldClient.BlockByHash(ctx, common.HexToHash(contract.BlockHash))
+			Expect(err).ToNot(HaveOccurred())
+
+			// check headers are equals
+			compareBlocks(gethBlock, ipldBlock)
+
+			gethTxs := gethBlock.Transactions()
+			ipldTxs := ipldBlock.Transactions()
+
+			Expect(gethTxs.Len()).To(Equal(ipldTxs.Len()))
+			Expect(types.TxDifference(gethTxs, ipldTxs).Len()).To(Equal(0))
+		})
+	})
+
+	Describe("Transaction", func() {
+		BeforeEach(func() {
+			contract, contractErr = integration.DeployContract()
+			time.Sleep(sleepInterval)
+		})
+
+		It("Get tx by hash", func() {
+			Expect(contractErr).ToNot(HaveOccurred())
+
+			gethTx, _, err := gethClient.TransactionByHash(ctx, common.HexToHash(contract.TransactionHash))
+			Expect(err).ToNot(HaveOccurred())
+
+			ipldTx, _, err := ipldClient.TransactionByHash(ctx, common.HexToHash(contract.TransactionHash))
+			Expect(err).ToNot(HaveOccurred())
+
+			compareTxs(gethTx, ipldTx)
+
+			Expect(gethTx.Hash()).To(Equal(ipldTx.Hash()))
+		})
+
+		It("Get tx by block hash and index", func() {
+			gethTx, err := gethClient.TransactionInBlock(ctx, common.HexToHash(contract.BlockHash), 0)
+			Expect(err).ToNot(HaveOccurred())
+
+			ipldTx, err := ipldClient.TransactionInBlock(ctx, common.HexToHash(contract.BlockHash), 0)
+			Expect(err).ToNot(HaveOccurred())
+
+			compareTxs(gethTx, ipldTx)
+		})
+	})
+
+	Describe("Receipt", func() {
+		BeforeEach(func() {
+			contract, contractErr = integration.DeployContract()
+			time.Sleep(sleepInterval)
+		})
+
+		It("Get tx receipt", func() {
+			Expect(contractErr).ToNot(HaveOccurred())
+
+			gethReceipt, err := gethClient.TransactionReceipt(ctx, common.HexToHash(contract.TransactionHash))
+			Expect(err).ToNot(HaveOccurred())
+
+			ipldReceipt, err := ipldClient.TransactionReceipt(ctx, common.HexToHash(contract.TransactionHash))
+			Expect(err).ToNot(HaveOccurred())
+
+			Expect(gethReceipt).To(Equal(ipldReceipt))
+
+			rlpGeth, err := rlp.EncodeToBytes(gethReceipt)
+			Expect(err).ToNot(HaveOccurred())
+
+			rlpIpld, err := rlp.EncodeToBytes(ipldReceipt)
+			Expect(err).ToNot(HaveOccurred())
+
+			Expect(rlpGeth).To(Equal(rlpIpld))
+		})
+	})
+
+	Describe("FilterLogs", func() {
+		BeforeEach(func() {
+			contract, contractErr = integration.DeployContract()
+			time.Sleep(sleepInterval)
+		})
+
+		It("with blockhash", func() {
+			Expect(contractErr).ToNot(HaveOccurred())
+
+			blockHash := common.HexToHash(contract.BlockHash)
+			filterQuery := ethereum.FilterQuery{
+				//Addresses: addresses,
+				BlockHash: &blockHash,
+				Topics:    [][]common.Hash{},
+			}
+
+			gethLogs, err := gethClient.FilterLogs(ctx, filterQuery)
+			Expect(err).ToNot(HaveOccurred())
+
+			ipldLogs, err := ipldClient.FilterLogs(ctx, filterQuery)
+			Expect(err).ToNot(HaveOccurred())
+
+			// not empty list
+			Expect(gethLogs).ToNot(BeEmpty())
+
+			Expect(len(gethLogs)).To(Equal(len(ipldLogs)))
+			Expect(gethLogs).To(Equal(ipldLogs))
+		})
+	})
+
+	Describe("CodeAt", func() {
+		BeforeEach(func() {
+			contract, contractErr = integration.DeployContract()
+			time.Sleep(sleepInterval)
+		})
+
+		It("gets code at non-existing address without block number", func() {
+			Expect(contractErr).ToNot(HaveOccurred())
+
+			gethCode, err := gethClient.CodeAt(ctx, common.HexToAddress(nonExistingAddress), nil)
+			Expect(err).ToNot(HaveOccurred())
+
+			ipldCode, err := ipldClient.CodeAt(ctx, common.HexToAddress(nonExistingAddress), nil)
+			Expect(err).ToNot(HaveOccurred())
+
+			Expect(gethCode).To(BeEmpty())
+			Expect(gethCode).To(Equal(ipldCode))
+		})
+		It("gets code of deployed contract without block number", func() {
+			gethCode, err := gethClient.CodeAt(ctx, common.HexToAddress(contract.Address), nil)
+			Expect(err).ToNot(HaveOccurred())
+
+			ipldCode, err := ipldClient.CodeAt(ctx, common.HexToAddress(contract.Address), nil)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(gethCode).To(Equal(ipldCode))
+		})
+		It("gets code of deployed contract with block number", func() {
+			gethCode, err := gethClient.CodeAt(ctx, common.HexToAddress(contract.Address), big.NewInt(int64(contract.BlockNumber)))
+			Expect(err).ToNot(HaveOccurred())
+
+			ipldCode, err := ipldClient.CodeAt(ctx, common.HexToAddress(contract.Address), big.NewInt(int64(contract.BlockNumber)))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(gethCode).To(Equal(ipldCode))
+		})
+		It("gets code of contract that doesn't exist at this height", func() {
+			gethCode, err := gethClient.CodeAt(ctx, common.HexToAddress(contract.Address), big.NewInt(int64(contract.BlockNumber-1)))
+			Expect(err).ToNot(HaveOccurred())
+
+			ipldCode, err := ipldClient.CodeAt(ctx, common.HexToAddress(contract.Address), big.NewInt(int64(contract.BlockNumber-1)))
+			Expect(err).ToNot(HaveOccurred())
+
+			Expect(gethCode).To(BeEmpty())
+			Expect(gethCode).To(Equal(ipldCode))
+		})
+	})
+
+	Describe("Get balance", func() {
+		address := "0x1111111111111111111111111111111111111112"
+		BeforeEach(func() {
+			tx, txErr = integration.SendEth(address, "0.01")
+			time.Sleep(sleepInterval)
+		})
+
+		It("gets balance for an account with eth without block number", func() {
+			Expect(txErr).ToNot(HaveOccurred())
+
+			gethBalance, err := gethClient.BalanceAt(ctx, common.HexToAddress(address), nil)
+			Expect(err).ToNot(HaveOccurred())
+
+			ipldBalance, err := ipldClient.BalanceAt(ctx, common.HexToAddress(address), nil)
+			Expect(err).ToNot(HaveOccurred())
+
+			Expect(gethBalance).To(Equal(ipldBalance))
+		})
+		It("gets balance for an account with eth with block number", func() {
+			Expect(txErr).ToNot(HaveOccurred())
+
+			gethBalance, err := gethClient.BalanceAt(ctx, common.HexToAddress(address), big.NewInt(int64(tx.BlockNumber)))
+			Expect(err).ToNot(HaveOccurred())
+
+			ipldBalance, err := ipldClient.BalanceAt(ctx, common.HexToAddress(address), big.NewInt(int64(tx.BlockNumber)))
+			Expect(err).ToNot(HaveOccurred())
+
+			Expect(gethBalance).To(Equal(ipldBalance))
+		})
+		It("gets historical balance for an account with eth with block number", func() {
+			Expect(txErr).ToNot(HaveOccurred())
+
+			gethBalance, err := gethClient.BalanceAt(ctx, common.HexToAddress(address), big.NewInt(int64(tx.BlockNumber-1)))
+			Expect(err).ToNot(HaveOccurred())
+
+			ipldBalance, err := ipldClient.BalanceAt(ctx, common.HexToAddress(address), big.NewInt(int64(tx.BlockNumber-1)))
+			Expect(err).ToNot(HaveOccurred())
+
+			Expect(gethBalance).To(Equal(ipldBalance))
+		})
+		It("gets balance for a non-existing account without block number", func() {
+			Expect(txErr).ToNot(HaveOccurred())
+
+			gethBalance, err := gethClient.BalanceAt(ctx, common.HexToAddress(nonExistingAddress), nil)
+			Expect(err).ToNot(HaveOccurred())
+
+			ipldBalance, err := ipldClient.BalanceAt(ctx, common.HexToAddress(nonExistingAddress), nil)
+			Expect(err).ToNot(HaveOccurred())
+
+			Expect(gethBalance).To(Equal(ipldBalance))
+		})
+		It("gets balance for an non-existing block number", func() {
+			Expect(txErr).ToNot(HaveOccurred())
+
+			gethBalance, err := gethClient.BalanceAt(ctx, common.HexToAddress(address), big.NewInt(int64(tx.BlockNumber+3)))
+			Expect(err).To(MatchError("header not found"))
+
+			ipldBalance, err := ipldClient.BalanceAt(ctx, common.HexToAddress(nonExistingAddress), big.NewInt(int64(tx.BlockNumber+3)))
+			Expect(err).To(MatchError("header not found"))
+
+			Expect(gethBalance).To(Equal(ipldBalance))
+		})
+	})
+
+	Describe("Get Storage", func() {
+		BeforeEach(func() {
+			contract, contractErr = integration.DeployContract()
+			erc20TotalSupply, bigIntResult = new(big.Int).SetString("1000000000000000000000", 10)
+
+			time.Sleep(sleepInterval)
+		})
+
+		It("gets ERC20 total supply (without block number)", func() {
+			Expect(contractErr).ToNot(HaveOccurred())
+			Expect(bigIntResult).To(Equal(true))
+
+			totalSupplyIndex := "0x2"
+
+			gethStorage, err := gethClient.StorageAt(ctx, common.HexToAddress(contract.Address), common.HexToHash(totalSupplyIndex), nil)
+			Expect(err).ToNot(HaveOccurred())
+
+			gethTotalSupply := new(big.Int).SetBytes(gethStorage)
+			Expect(gethTotalSupply).To(Equal(erc20TotalSupply))
+
+			ipldStorage, err := ipldClient.StorageAt(ctx, common.HexToAddress(contract.Address), common.HexToHash(totalSupplyIndex), nil)
+			Expect(err).ToNot(HaveOccurred())
+
+			ipldTotalSupply := new(big.Int).SetBytes(ipldStorage)
+			Expect(ipldTotalSupply).To(Equal(erc20TotalSupply))
+
+			Expect(gethStorage).To(Equal(ipldStorage))
+		})
+
+		It("gets ERC20 total supply (with block number)", func() {
+			totalSupplyIndex := "0x2"
+
+			gethStorage, err := gethClient.StorageAt(ctx, common.HexToAddress(contract.Address), common.HexToHash(totalSupplyIndex), big.NewInt(int64(contract.BlockNumber)))
+			Expect(err).ToNot(HaveOccurred())
+
+			gethTotalSupply := new(big.Int).SetBytes(gethStorage)
+			Expect(gethTotalSupply).To(Equal(erc20TotalSupply))
+
+			ipldStorage, err := ipldClient.StorageAt(ctx, common.HexToAddress(contract.Address), common.HexToHash(totalSupplyIndex), big.NewInt(int64(contract.BlockNumber)))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(gethStorage).To(Equal(ipldStorage))
+		})
+		It("gets storage for non-existing account", func() {
+			totalSupplyIndex := "0x2"
+
+			gethStorage, err := gethClient.StorageAt(ctx, common.HexToAddress(nonExistingAddress), common.HexToHash(totalSupplyIndex), big.NewInt(int64(contract.BlockNumber)))
+			Expect(err).ToNot(HaveOccurred())
+
+			ipldStorage, err := ipldClient.StorageAt(ctx, common.HexToAddress(nonExistingAddress), common.HexToHash(totalSupplyIndex), big.NewInt(int64(contract.BlockNumber)))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(gethStorage).To(Equal(ipldStorage))
+		})
+		It("gets storage for non-existing contract slot", func() {
+			gethStorage, err := gethClient.StorageAt(ctx, common.HexToAddress(contract.Address), randomHash, big.NewInt(int64(contract.BlockNumber)))
+			Expect(err).ToNot(HaveOccurred())
+
+			ipldStorage, err := ipldClient.StorageAt(ctx, common.HexToAddress(contract.Address), randomHash, big.NewInt(int64(contract.BlockNumber)))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(gethStorage).To(Equal(ipldStorage))
+		})
+		It("gets storage for non-existing contract", func() {
+			totalSupplyIndex := "0x2"
+			gethStorage, err := gethClient.StorageAt(ctx, common.HexToAddress(contract.Address), common.HexToHash(totalSupplyIndex), big.NewInt(0))
+			Expect(err).ToNot(HaveOccurred())
+
+			ipldStorage, err := ipldClient.StorageAt(ctx, common.HexToAddress(contract.Address), common.HexToHash(totalSupplyIndex), big.NewInt(0))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(gethStorage).To(Equal(ipldStorage))
+		})
+		It("gets storage for non-existing block number", func() {
+			blockNum := contract.BlockNumber + 100
+			totalSupplyIndex := "0x2"
+
+			gethStorage, err := gethClient.StorageAt(ctx, common.HexToAddress(contract.Address), common.HexToHash(totalSupplyIndex), big.NewInt(int64(blockNum)))
+			Expect(err).To(MatchError("header not found"))
+
+			ipldStorage, err := ipldClient.StorageAt(ctx, common.HexToAddress(contract.Address), common.HexToHash(totalSupplyIndex), big.NewInt(int64(blockNum)))
+			Expect(err).To(MatchError("header not found"))
+			Expect(gethStorage).To(Equal(ipldStorage))
+		})
+	})
+
+	Describe("eth call", func() {
+		BeforeEach(func() {
+			contract, contractErr = integration.DeployContract()
+			erc20TotalSupply, bigIntResult = new(big.Int).SetString("1000000000000000000000", 10)
+
+			time.Sleep(sleepInterval)
+		})
+
+		It("calls totalSupply() without block number", func() {
+			Expect(contractErr).ToNot(HaveOccurred())
+			Expect(bigIntResult).To(Equal(true))
+
+			contractAddress := common.HexToAddress(contract.Address)
+
+			msg := ethereum.CallMsg{
+				To:   &contractAddress,
+				Data: common.Hex2Bytes("18160ddd"), // totalSupply()
+			}
+			gethResult, err := gethClient.CallContract(ctx, msg, nil)
+			Expect(err).ToNot(HaveOccurred())
+
+			gethTotalSupply := new(big.Int).SetBytes(gethResult)
+			Expect(gethTotalSupply).To(Equal(erc20TotalSupply))
+
+			ipldResult, err := ipldClient.CallContract(ctx, msg, nil)
+			Expect(err).ToNot(HaveOccurred())
+
+			Expect(gethResult).To(Equal(ipldResult))
+		})
+
+		It("calls totalSupply() with block number", func() {
+			contractAddress := common.HexToAddress(contract.Address)
+
+			msg := ethereum.CallMsg{
+				To:   &contractAddress,
+				Data: common.Hex2Bytes("18160ddd"), // totalSupply()
+			}
+			gethResult, err := gethClient.CallContract(ctx, msg, big.NewInt(int64(contract.BlockNumber)))
+			Expect(err).ToNot(HaveOccurred())
+
+			gethTotalSupply := new(big.Int).SetBytes(gethResult)
+			Expect(gethTotalSupply).To(Equal(erc20TotalSupply))
+
+			ipldResult, err := ipldClient.CallContract(ctx, msg, big.NewInt(int64(contract.BlockNumber)))
+			Expect(err).ToNot(HaveOccurred())
+
+			Expect(gethResult).To(Equal(ipldResult))
+		})
+	})
+
+	Describe("Chain ID", func() {
+		It("Check chain id", func() {
+			gethChainId, err := gethClient.ChainID(ctx)
+			Expect(err).ToNot(HaveOccurred())
+
+			ipldChainId, err := ipldClient.ChainID(ctx)
+			Expect(err).ToNot(HaveOccurred())
+
+			Expect(gethChainId).To(Equal(ipldChainId))
+		})
+	})
+})
+
+func compareBlocks(block1 *types.Block, block2 *types.Block) {
+	Expect(block1.Header()).To(Equal(block2.Header()))
+	Expect(block1.Uncles()).To(Equal(block2.Uncles()))
+
+	txs1 := block1.Transactions()
+	txs2 := block2.Transactions()
+
+	Expect(len(txs1)).To(Equal(len(txs2)))
+	for i, tx := range txs1 {
+		compareTxs(tx, txs2[i])
+	}
+}
+
+func compareTxs(tx1 *types.Transaction, tx2 *types.Transaction) {
+	Expect(tx1.Data()).To(Equal(tx2.Data()))
+	Expect(tx1.Hash()).To(Equal(tx2.Hash()))
+	Expect(tx1.Size()).To(Equal(tx2.Size()))
+
+	signer := types.NewEIP155Signer(big.NewInt(4))
+
+	gethSender, err := types.Sender(signer, tx1)
+	Expect(err).ToNot(HaveOccurred())
+
+	ipldSender, err := types.Sender(signer, tx2)
+	Expect(err).ToNot(HaveOccurred())
+
+	Expect(gethSender).To(Equal(ipldSender))
+}