ipld-eth-server/libraries/shared/watcher/geth_storage_watcher.go

63 lines
2.3 KiB
Go

// Copyright 2018 Vulcanize
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package watcher
import (
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
"github.com/vulcanize/vulcanizedb/libraries/shared/fetcher"
"github.com/vulcanize/vulcanizedb/libraries/shared/storage"
"github.com/vulcanize/vulcanizedb/libraries/shared/storage/utils"
"github.com/vulcanize/vulcanizedb/libraries/shared/transformer"
"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
)
type GethStorageWatcher struct {
StorageWatcher
}
func NewGethStorageWatcher(fetcher fetcher.IStorageFetcher, db *postgres.DB) GethStorageWatcher {
queue := storage.NewStorageQueue(db)
transformers := make(map[common.Address]transformer.StorageTransformer)
keccakAddressTransformers := make(map[common.Hash]transformer.StorageTransformer)
storageWatcher := StorageWatcher{
db: db,
StorageFetcher: fetcher,
Queue: queue,
Transformers: transformers,
KeccakAddressTransformers: keccakAddressTransformers,
}
storageWatcher.transformerGetter = storageWatcher.getTransformerForGethWatcher
return GethStorageWatcher{StorageWatcher: storageWatcher}
}
func (storageWatcher StorageWatcher) getTransformerForGethWatcher(diff utils.StorageDiff) (transformer.StorageTransformer, bool) {
keccakOfAddress := diff.KeccakOfContractAddress
storageTransformer, ok := storageWatcher.KeccakAddressTransformers[keccakOfAddress]
if ok {
return storageTransformer, ok
} else {
for address, transformer := range storageWatcher.Transformers {
keccakOfTransformerAddress := common.BytesToHash(crypto.Keccak256(address[:]))
if keccakOfTransformerAddress == keccakOfAddress {
storageWatcher.KeccakAddressTransformers[keccakOfAddress] = transformer
return transformer, true
}
}
}
return nil, false
}