89 lines
2.3 KiB
Go
89 lines
2.3 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 dent
|
|
|
|
import (
|
|
"encoding/json"
|
|
"errors"
|
|
"math/big"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/core/types"
|
|
)
|
|
|
|
type DentConverter struct{}
|
|
|
|
func NewDentConverter() DentConverter {
|
|
return DentConverter{}
|
|
}
|
|
|
|
func (c DentConverter) ToModels(ethLogs []types.Log) (result []interface{}, err error) {
|
|
for _, log := range ethLogs {
|
|
err := validateLog(log)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
bidId := log.Topics[2].Big()
|
|
lot := log.Topics[3].Big().String()
|
|
bidValue := getBidValue(log)
|
|
// TODO: verify guy is available on Topics[1] (looks like it may just be an int id)
|
|
guy := common.HexToAddress(log.Topics[1].Hex()).String()
|
|
|
|
logIndex := log.Index
|
|
transactionIndex := log.TxIndex
|
|
|
|
raw, err := json.Marshal(log)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
model := DentModel{
|
|
BidId: bidId.String(),
|
|
Lot: lot,
|
|
Bid: bidValue,
|
|
Guy: guy,
|
|
LogIndex: logIndex,
|
|
TransactionIndex: transactionIndex,
|
|
Raw: raw,
|
|
}
|
|
result = append(result, model)
|
|
}
|
|
return result, err
|
|
}
|
|
|
|
func validateLog(ethLog types.Log) error {
|
|
if len(ethLog.Data) <= 0 {
|
|
return errors.New("dent log data is empty")
|
|
}
|
|
|
|
if len(ethLog.Topics) < 4 {
|
|
return errors.New("dent log does not contain expected topics")
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func getBidValue(ethLog types.Log) string {
|
|
itemByteLength := 32
|
|
lastDataItemStartIndex := len(ethLog.Data) - itemByteLength
|
|
lastItem := ethLog.Data[lastDataItemStartIndex:]
|
|
lastValue := big.NewInt(0).SetBytes(lastItem)
|
|
|
|
return lastValue.String()
|
|
}
|