forked from cerc-io/ipld-eth-server
73 lines
2.5 KiB
Go
73 lines
2.5 KiB
Go
// VulcanizeDB
|
|
// Copyright © 2018 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 chunker
|
|
|
|
import (
|
|
"strings"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/core/types"
|
|
|
|
shared_t "github.com/vulcanize/vulcanizedb/libraries/shared/transformer"
|
|
)
|
|
|
|
type Chunker interface {
|
|
AddConfigs(transformerConfigs []shared_t.TransformerConfig)
|
|
ChunkLogs(logs []types.Log) map[string][]types.Log
|
|
}
|
|
|
|
type LogChunker struct {
|
|
AddressToNames map[string][]string
|
|
NameToTopic0 map[string]common.Hash
|
|
}
|
|
|
|
// Returns a new log chunker with initialised maps.
|
|
// Needs to have configs added with `AddConfigs` to consider logs for the respective transformer.
|
|
func NewLogChunker() *LogChunker {
|
|
return &LogChunker{
|
|
AddressToNames: map[string][]string{},
|
|
NameToTopic0: map[string]common.Hash{},
|
|
}
|
|
}
|
|
|
|
// Configures the chunker by adding more addreses and topics to consider.
|
|
func (chunker *LogChunker) AddConfigs(transformerConfigs []shared_t.TransformerConfig) {
|
|
for _, config := range transformerConfigs {
|
|
for _, address := range config.ContractAddresses {
|
|
var lowerCaseAddress = strings.ToLower(address)
|
|
chunker.AddressToNames[lowerCaseAddress] = append(chunker.AddressToNames[lowerCaseAddress], config.TransformerName)
|
|
chunker.NameToTopic0[config.TransformerName] = common.HexToHash(config.Topic)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Goes through an array of logs, associating relevant logs (matching addresses and topic) with transformers
|
|
func (chunker *LogChunker) ChunkLogs(logs []types.Log) map[string][]types.Log {
|
|
chunks := map[string][]types.Log{}
|
|
for _, log := range logs {
|
|
// Topic0 is not unique to each transformer, also need to consider the contract address
|
|
relevantTransformers := chunker.AddressToNames[strings.ToLower(log.Address.String())]
|
|
|
|
for _, transformer := range relevantTransformers {
|
|
if chunker.NameToTopic0[transformer] == log.Topics[0] {
|
|
chunks[transformer] = append(chunks[transformer], log)
|
|
}
|
|
}
|
|
}
|
|
return chunks
|
|
}
|