ipld-eth-server/pkg/super_node/eth/converter.go
2020-02-23 17:15:26 -06:00

179 lines
6.3 KiB
Go

// 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
import (
"fmt"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/statediff"
"github.com/vulcanize/vulcanizedb/pkg/super_node/shared"
)
// PayloadConverter satisfies the PayloadConverter interface for ethereum
type PayloadConverter struct {
chainConfig *params.ChainConfig
}
// NewPayloadConverter creates a pointer to a new PayloadConverter which satisfies the PayloadConverter interface
func NewPayloadConverter(chainConfig *params.ChainConfig) *PayloadConverter {
return &PayloadConverter{
chainConfig: chainConfig,
}
}
// Convert method is used to convert a eth statediff.Payload to an IPLDPayload
// Satisfies the shared.PayloadConverter interface
func (pc *PayloadConverter) Convert(payload shared.RawChainData) (shared.StreamedIPLDs, error) {
stateDiffPayload, ok := payload.(statediff.Payload)
if !ok {
return nil, fmt.Errorf("eth converter: expected payload type %T got %T", statediff.Payload{}, payload)
}
// Unpack block rlp to access fields
block := new(types.Block)
if err := rlp.DecodeBytes(stateDiffPayload.BlockRlp, block); err != nil {
return nil, err
}
trxLen := len(block.Transactions())
convertedPayload := IPLDPayload{
TotalDifficulty: stateDiffPayload.TotalDifficulty,
Block: block,
TxMetaData: make([]TxModel, 0, trxLen),
Receipts: make(types.Receipts, 0, trxLen),
ReceiptMetaData: make([]ReceiptModel, 0, trxLen),
StateNodes: make([]TrieNode, 0),
StorageNodes: make(map[common.Hash][]TrieNode),
}
signer := types.MakeSigner(pc.chainConfig, block.Number())
transactions := block.Transactions()
for i, trx := range transactions {
// Extract to and from data from the the transactions for indexing
from, err := types.Sender(signer, trx)
if err != nil {
return nil, err
}
txMeta := TxModel{
Dst: handleNullAddr(trx.To()),
Src: handleNullAddr(&from),
TxHash: trx.Hash().String(),
Index: int64(i),
}
// txMeta will have same index as its corresponding trx in the convertedPayload.BlockBody
convertedPayload.TxMetaData = append(convertedPayload.TxMetaData, txMeta)
}
// Decode receipts for this block
receipts := make(types.Receipts, 0)
if err := rlp.DecodeBytes(stateDiffPayload.ReceiptsRlp, &receipts); err != nil {
return nil, err
}
// Derive any missing fields
if err := receipts.DeriveFields(pc.chainConfig, block.Hash(), block.NumberU64(), block.Transactions()); err != nil {
return nil, err
}
for i, receipt := range receipts {
// If the transaction for this receipt has a "to" address, the above DeriveFields() fails to assign it to the receipt's ContractAddress
// If it doesn't have a "to" address, it correctly derives it and assigns it to to the receipt's ContractAddress
// Weird, right?
if transactions[i].To() != nil {
receipt.ContractAddress = *transactions[i].To()
}
// Extract topic and contract data from the receipt for indexing
topicSets := make([][]string, 4)
for _, log := range receipt.Logs {
for i := range topicSets {
if i < len(log.Topics) {
topicSets[i] = append(topicSets[i], log.Topics[i].Hex())
}
}
}
rctMeta := ReceiptModel{
Topic0s: topicSets[0],
Topic1s: topicSets[1],
Topic2s: topicSets[2],
Topic3s: topicSets[3],
Contract: receipt.ContractAddress.Hex(),
}
// receipt and rctMeta will have same indexes
convertedPayload.Receipts = append(convertedPayload.Receipts, receipt)
convertedPayload.ReceiptMetaData = append(convertedPayload.ReceiptMetaData, rctMeta)
}
// Unpack state diff rlp to access fields
stateDiff := new(statediff.StateDiff)
if err := rlp.DecodeBytes(stateDiffPayload.StateDiffRlp, stateDiff); err != nil {
return nil, err
}
for _, createdAccount := range stateDiff.CreatedAccounts {
hashKey := common.BytesToHash(createdAccount.Key)
convertedPayload.StateNodes = append(convertedPayload.StateNodes, TrieNode{
Key: hashKey,
Value: createdAccount.Value,
Leaf: createdAccount.Leaf,
})
for _, storageDiff := range createdAccount.Storage {
convertedPayload.StorageNodes[hashKey] = append(convertedPayload.StorageNodes[hashKey], TrieNode{
Key: common.BytesToHash(storageDiff.Key),
Value: storageDiff.Value,
Leaf: storageDiff.Leaf,
})
}
}
for _, deletedAccount := range stateDiff.DeletedAccounts {
hashKey := common.BytesToHash(deletedAccount.Key)
convertedPayload.StateNodes = append(convertedPayload.StateNodes, TrieNode{
Key: hashKey,
Value: deletedAccount.Value,
Leaf: deletedAccount.Leaf,
})
for _, storageDiff := range deletedAccount.Storage {
convertedPayload.StorageNodes[hashKey] = append(convertedPayload.StorageNodes[hashKey], TrieNode{
Key: common.BytesToHash(storageDiff.Key),
Value: storageDiff.Value,
Leaf: storageDiff.Leaf,
})
}
}
for _, updatedAccount := range stateDiff.UpdatedAccounts {
hashKey := common.BytesToHash(updatedAccount.Key)
convertedPayload.StateNodes = append(convertedPayload.StateNodes, TrieNode{
Key: hashKey,
Value: updatedAccount.Value,
Leaf: updatedAccount.Leaf,
})
for _, storageDiff := range updatedAccount.Storage {
convertedPayload.StorageNodes[hashKey] = append(convertedPayload.StorageNodes[hashKey], TrieNode{
Key: common.BytesToHash(storageDiff.Key),
Value: storageDiff.Value,
Leaf: storageDiff.Leaf,
})
}
}
return convertedPayload, nil
}
func handleNullAddr(to *common.Address) string {
if to == nil {
return "0x0000000000000000000000000000000000000000000000000000000000000000"
}
return to.Hex()
}