66 lines
1.8 KiB
Go
66 lines
1.8 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 chop_lump
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/json"
|
|
"errors"
|
|
"github.com/ethereum/go-ethereum/core/types"
|
|
"github.com/vulcanize/vulcanizedb/pkg/transformers/shared/constants"
|
|
"math/big"
|
|
)
|
|
|
|
type CatFileChopLumpConverter struct{}
|
|
|
|
func (CatFileChopLumpConverter) ToModels(ethLogs []types.Log) ([]interface{}, error) {
|
|
var results []interface{}
|
|
for _, ethLog := range ethLogs {
|
|
err := verifyLog(ethLog)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
ilk := string(bytes.Trim(ethLog.Topics[2].Bytes(), "\x00"))
|
|
what := string(bytes.Trim(ethLog.Topics[3].Bytes(), "\x00"))
|
|
dataBytes := ethLog.Data[len(ethLog.Data)-constants.DataItemLength:]
|
|
data := big.NewInt(0).SetBytes(dataBytes).String()
|
|
|
|
raw, err := json.Marshal(ethLog)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
result := CatFileChopLumpModel{
|
|
Ilk: ilk,
|
|
What: what,
|
|
Data: data,
|
|
TransactionIndex: ethLog.TxIndex,
|
|
LogIndex: ethLog.Index,
|
|
Raw: raw,
|
|
}
|
|
results = append(results, result)
|
|
}
|
|
return results, nil
|
|
}
|
|
|
|
func verifyLog(log types.Log) error {
|
|
if len(log.Topics) < 4 {
|
|
return errors.New("log missing topics")
|
|
}
|
|
if len(log.Data) < constants.DataItemLength {
|
|
return errors.New("log missing data")
|
|
}
|
|
return nil
|
|
}
|