65 lines
1.7 KiB
Go
65 lines
1.7 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 vat_slip
|
||
|
|
|
||
|
|
import (
|
||
|
|
"bytes"
|
||
|
|
"encoding/json"
|
||
|
|
"errors"
|
||
|
|
"github.com/ethereum/go-ethereum/common"
|
||
|
|
"github.com/ethereum/go-ethereum/core/types"
|
||
|
|
)
|
||
|
|
|
||
|
|
type Converter interface {
|
||
|
|
ToModels(ethLogs []types.Log) ([]VatSlipModel, error)
|
||
|
|
}
|
||
|
|
|
||
|
|
type VatSlipConverter struct{}
|
||
|
|
|
||
|
|
func (VatSlipConverter) ToModels(ethLogs []types.Log) ([]VatSlipModel, error) {
|
||
|
|
var models []VatSlipModel
|
||
|
|
for _, ethLog := range ethLogs {
|
||
|
|
err := verifyLog(ethLog)
|
||
|
|
if err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
ilk := string(bytes.Trim(ethLog.Topics[1].Bytes(), "\x00"))
|
||
|
|
guy := common.BytesToAddress(ethLog.Topics[2].Bytes())
|
||
|
|
rad := ethLog.Topics[3].Big()
|
||
|
|
|
||
|
|
raw, err := json.Marshal(ethLog)
|
||
|
|
if err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
model := VatSlipModel{
|
||
|
|
Ilk: ilk,
|
||
|
|
Guy: guy.String(),
|
||
|
|
Rad: rad.String(),
|
||
|
|
TransactionIndex: ethLog.TxIndex,
|
||
|
|
Raw: raw,
|
||
|
|
}
|
||
|
|
models = append(models, model)
|
||
|
|
}
|
||
|
|
return models, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func verifyLog(log types.Log) error {
|
||
|
|
numTopicInValidLog := 4
|
||
|
|
if len(log.Topics) < numTopicInValidLog {
|
||
|
|
return errors.New("log missing topics")
|
||
|
|
}
|
||
|
|
return nil
|
||
|
|
}
|