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Decode storage value RLP after fetching from statediffs

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This commit is contained in:
Elizabeth Engelman
2019-09-25 16:36:44 -05:00
parent 2931edc317
commit 6869330bd3
5 changed files with 157 additions and 57 deletions
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libraries/shared/storage/utils/diff.go
+10 -3
View File
@@ -19,6 +19,7 @@ package utils
import (
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/statediff"
"strconv"
)
@@ -51,14 +52,20 @@ func FromParityCsvRow(csvRow []string) (StorageDiff, error) {
}, nil
}
func FromGethStateDiff(account statediff.AccountDiff, stateDiff *statediff.StateDiff, storage statediff.StorageDiff) StorageDiff {
func FromGethStateDiff(account statediff.AccountDiff, stateDiff *statediff.StateDiff, storage statediff.StorageDiff) (StorageDiff, error) {
var decodedValue []byte
err := rlp.DecodeBytes(storage.Value, &decodedValue)
if err != nil {
return StorageDiff{}, err
}
return StorageDiff{
KeccakOfContractAddress: common.BytesToHash(account.Key),
BlockHash: stateDiff.BlockHash,
BlockHeight: int(stateDiff.BlockNumber.Int64()),
StorageKey: common.BytesToHash(storage.Key),
StorageValue: common.BytesToHash(storage.Value),
}
StorageValue: common.BytesToHash(decodedValue),
}, nil
}
func HexToKeccak256Hash(hex string) common.Hash {
libraries/shared/storage/utils/diff_test.go
+42 -6
View File
@@ -18,10 +18,12 @@ package utils_test
import (
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/statediff"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
"github.com/vulcanize/vulcanizedb/libraries/shared/storage/utils"
"github.com/vulcanize/vulcanizedb/libraries/shared/test_data"
"github.com/vulcanize/vulcanizedb/pkg/fakes"
"math/big"
"math/rand"
@@ -63,18 +65,26 @@ var _ = Describe("Storage row parsing", func() {
})
Describe("FromGethStateDiff", func() {
It("adds relevant fields to diff", func() {
accountDiff := statediff.AccountDiff{Key: []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0}}
stateDiff := &statediff.StateDiff{
var (
accountDiff = statediff.AccountDiff{Key: []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0}}
stateDiff = &statediff.StateDiff{
BlockNumber: big.NewInt(rand.Int63()),
BlockHash: fakes.FakeHash,
}
)
It("adds relevant fields to diff", func() {
storageValueBytes := []byte{3}
storageValueRlp, encodeErr := rlp.EncodeToBytes(storageValueBytes)
Expect(encodeErr).NotTo(HaveOccurred())
storageDiff := statediff.StorageDiff{
Key: []byte{0, 9, 8, 7, 6, 5, 4, 3, 2, 1},
Value: []byte{1, 2, 3, 4, 5, 0, 9, 8, 7, 6},
Value: storageValueRlp,
}
result := utils.FromGethStateDiff(accountDiff, stateDiff, storageDiff)
result, err := utils.FromGethStateDiff(accountDiff, stateDiff, storageDiff)
Expect(err).NotTo(HaveOccurred())
expectedAddress := common.BytesToHash(accountDiff.Key)
Expect(result.KeccakOfContractAddress).To(Equal(expectedAddress))
@@ -83,8 +93,34 @@ var _ = Describe("Storage row parsing", func() {
Expect(result.BlockHeight).To(Equal(expectedBlockHeight))
expectedStorageKey := common.BytesToHash(storageDiff.Key)
Expect(result.StorageKey).To(Equal(expectedStorageKey))
expectedStorageValue := common.BytesToHash(storageDiff.Value)
expectedStorageValue := common.BytesToHash(storageValueBytes)
Expect(result.StorageValue).To(Equal(expectedStorageValue))
})
It("handles decoding large storage values from their RLP", func() {
storageValueBytes := []byte{1, 2, 3, 4, 5, 0, 9, 8, 7, 6}
storageValueRlp, encodeErr := rlp.EncodeToBytes(storageValueBytes)
Expect(encodeErr).NotTo(HaveOccurred())
storageDiff := statediff.StorageDiff{
Key: []byte{0, 9, 8, 7, 6, 5, 4, 3, 2, 1},
Value: storageValueRlp,
}
result, err := utils.FromGethStateDiff(accountDiff, stateDiff, storageDiff)
Expect(err).NotTo(HaveOccurred())
Expect(result.StorageValue).To(Equal(common.BytesToHash(storageValueBytes)))
})
It("returns an err if decoding the storage value Rlp fails", func() {
storageDiff := statediff.StorageDiff{
Key: []byte{0, 9, 8, 7, 6, 5, 4, 3, 2, 1},
Value: test_data.StorageKey,
}
_, err := utils.FromGethStateDiff(accountDiff, stateDiff, storageDiff)
Expect(err).To(HaveOccurred())
Expect(err).To(MatchError("rlp: input contains more than one value"))
})
})
})