eth_call test

pkg/eth/api.go

@@ -32,6 +32,7 @@ import (
 	"github.com/ethereum/go-ethereum/params"
 	"github.com/ethereum/go-ethereum/rpc"
 	"github.com/sirupsen/logrus"
+
 	"github.com/vulcanize/ipld-eth-indexer/pkg/eth"
 	"github.com/vulcanize/ipld-eth-server/pkg/shared"
 )
@@ -42,10 +43,6 @@ const APIName = "eth"
 // APIVersion is the version of the watcher's eth api
 const APIVersion = "0.0.1"
 
-var (
-	txRequiresSenderErr = errors.New("default sender address not set; tx requires sender address")
-)
-
 type PublicEthAPI struct {
 	B *Backend
 }
@@ -217,7 +214,10 @@ func (pea *PublicEthAPI) Call(ctx context.Context, args CallArgs, blockNrOrHash
 	if overrides != nil {
 		accounts = *overrides
 	}
-	result, _, _, err := DoCall(ctx, pea.B, args, blockNrOrHash, accounts, 5*time.Second, pea.B.Config.RPCGasCap)
+	result, _, failed, err := DoCall(ctx, pea.B, args, blockNrOrHash, accounts, 5*time.Second, pea.B.Config.RPCGasCap)
+	if failed && err == nil {
+		return nil, errors.New("eth_call failed without error")
+	}
 	return (hexutil.Bytes)(result), err
 }
 
@@ -256,10 +256,9 @@ func DoCall(ctx context.Context, b *Backend, args CallArgs, blockNrOrHash rpc.Bl
 	// Set sender address or use a default if none specified
 	var addr common.Address
 	if args.From == nil {
-		if b.Config.DefaultSender == nil {
-			return nil, 0, false, txRequiresSenderErr
+		if b.Config.DefaultSender != nil {
+			addr = *b.Config.DefaultSender
 		}
-		addr = *b.Config.DefaultSender
 	} else {
 		addr = *args.From
 	}

pkg/eth/backend.go

@@ -59,7 +59,7 @@ type Backend struct {
 	// underlying postgres db
 	DB *postgres.DB
 
-	// postgres db types
+	// postgres db interfaces
 	Retriever     *CIDRetriever
 	Fetcher       *IPLDFetcher
 	IPLDRetriever *IPLDRetriever

pkg/eth/eth_call_test.go

@@ -0,0 +1,165 @@
+// VulcanizeDB
+// Copyright © 2019 Vulcanize
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package eth_test
+
+import (
+	"bytes"
+	"context"
+	"io/ioutil"
+	"math/big"
+
+	"github.com/ethereum/go-ethereum/accounts/abi"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/ethereum/go-ethereum/core"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/core/vm"
+	"github.com/ethereum/go-ethereum/params"
+	"github.com/ethereum/go-ethereum/rlp"
+	"github.com/ethereum/go-ethereum/rpc"
+	"github.com/ethereum/go-ethereum/statediff"
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	eth2 "github.com/vulcanize/ipld-eth-indexer/pkg/eth"
+	"github.com/vulcanize/ipld-eth-indexer/pkg/postgres"
+
+	"github.com/vulcanize/ipld-eth-server/pkg/eth"
+	"github.com/vulcanize/ipld-eth-server/pkg/eth/test_helpers"
+	"github.com/vulcanize/ipld-eth-server/pkg/shared"
+)
+
+var (
+	parsedABI 			abi.ABI
+)
+
+func init() {
+	// load abi
+	abiBytes, err := ioutil.ReadFile("./test_helpers/abi.json")
+	if err != nil {
+		panic(err)
+	}
+	parsedABI, err = abi.JSON(bytes.NewReader(abiBytes))
+	if err != nil {
+		panic(err)
+	}
+}
+
+var _ = Describe("eth_call", func() {
+	var (
+		blocks      []*types.Block
+		receipts    []types.Receipts
+		chain       *core.BlockChain
+		db          *postgres.DB
+		transformer *eth2.StateDiffTransformer
+		backend     *eth.Backend
+		api         *eth.PublicEthAPI
+		builder     statediff.Builder
+		pams        statediff.Params
+		chainConfig = params.TestChainConfig
+		mockTD      = big.NewInt(1337)
+	)
+
+	BeforeEach(func() {
+		// db and type initializations
+		var err error
+		db, err = shared.SetupDB()
+		Expect(err).ToNot(HaveOccurred())
+		transformer = eth2.NewStateDiffTransformer(chainConfig, db)
+		backend, err = eth.NewEthBackend(db, &eth.Config{
+			ChainConfig: chainConfig,
+			VmConfig:    vm.Config{},
+			RPCGasCap:   big.NewInt(10000000000),
+		})
+		Expect(err).ToNot(HaveOccurred())
+		api = eth.NewPublicEthAPI(backend)
+
+		// make the test blockchain (and state)
+		blocks, receipts, chain = test_helpers.MakeChain(4, test_helpers.Genesis, test_helpers.TestChainGen)
+		pams = statediff.Params{
+			IntermediateStateNodes:   true,
+			IntermediateStorageNodes: true,
+		}
+		// iterate over the blocks, generating statediff payloads, and transforming the data into Postgres
+		builder = statediff.NewBuilder(chain.StateCache())
+		for i, block := range blocks {
+			var args statediff.Args
+			var rcts types.Receipts
+			if i == 0 {
+				args = statediff.Args{
+					OldStateRoot: common.Hash{},
+					NewStateRoot: block.Root(),
+					BlockNumber:  block.Number(),
+					BlockHash:    block.Hash(),
+				}
+			} else {
+				args = statediff.Args{
+					OldStateRoot: blocks[i-1].Root(),
+					NewStateRoot: block.Root(),
+					BlockNumber:  block.Number(),
+					BlockHash:    block.Hash(),
+				}
+				rcts = receipts[i-1]
+			}
+			diff, err := builder.BuildStateDiffObject(args, pams)
+			Expect(err).ToNot(HaveOccurred())
+			diffRlp, err := rlp.EncodeToBytes(diff)
+			Expect(err).ToNot(HaveOccurred())
+			blockRlp, err := rlp.EncodeToBytes(block)
+			Expect(err).ToNot(HaveOccurred())
+			receiptsRlp, err := rlp.EncodeToBytes(rcts)
+			Expect(err).ToNot(HaveOccurred())
+			payload := statediff.Payload{
+				StateObjectRlp:  diffRlp,
+				BlockRlp:        blockRlp,
+				ReceiptsRlp:     receiptsRlp,
+				TotalDifficulty: mockTD,
+			}
+			_, err = transformer.Transform(0, payload)
+			Expect(err).ToNot(HaveOccurred())
+		}
+	})
+	AfterEach(func() {
+		//eth.TearDownDB(db)
+		chain.Stop()
+	})
+	FDescribe("eth_call", func() {
+		It("Applies call args (tx data) on top of state, returning the result (e.g. a Getter method call)", func() {
+			data, err := parsedABI.Pack("data")
+			Expect(err).ToNot(HaveOccurred())
+			bdata := hexutil.Bytes(data)
+			callArgs := eth.CallArgs{
+				To:   &test_helpers.ContractAddr,
+				Data: &bdata,
+			}
+			res, err := api.Call(context.Background(), callArgs, rpc.BlockNumberOrHashWithNumber(2), nil)
+			Expect(err).ToNot(HaveOccurred())
+			expectedRes := hexutil.Bytes(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000001"))
+			Expect(res).To(Equal(expectedRes))
+
+			res, err = api.Call(context.Background(), callArgs, rpc.BlockNumberOrHashWithNumber(3), nil)
+			Expect(err).ToNot(HaveOccurred())
+			expectedRes = hexutil.Bytes(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000003"))
+			Expect(res).To(Equal(expectedRes))
+
+			res, err = api.Call(context.Background(), callArgs, rpc.BlockNumberOrHashWithNumber(4), nil)
+			Expect(err).ToNot(HaveOccurred())
+			expectedRes = hexutil.Bytes(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000009"))
+			Expect(res).To(Equal(expectedRes))
+		})
+	})
+})