84 lines
2.2 KiB
Go
84 lines
2.2 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 tend
|
|
|
|
import (
|
|
"encoding/json"
|
|
"errors"
|
|
"math/big"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/core/types"
|
|
|
|
)
|
|
|
|
type Converter interface {
|
|
Convert(contractAddress string, contractAbi string, ethLog types.Log) (TendModel, error)
|
|
}
|
|
|
|
type TendConverter struct {}
|
|
|
|
func NewTendConverter() TendConverter {
|
|
return TendConverter{}
|
|
}
|
|
|
|
func (c TendConverter) Convert(contractAddress string, contractAbi string, ethLog types.Log) (TendModel, error) {
|
|
err := validateLog(ethLog)
|
|
if err != nil {
|
|
return TendModel{}, err
|
|
}
|
|
|
|
bidId := ethLog.Topics[2].Big()
|
|
guy := common.HexToAddress(ethLog.Topics[1].Hex()).String()
|
|
lot := ethLog.Topics[3].Big().String()
|
|
|
|
lastDataItemStartIndex := len(ethLog.Data) - 32
|
|
lastItem := ethLog.Data[lastDataItemStartIndex:]
|
|
last := big.NewInt(0).SetBytes(lastItem)
|
|
bidValue := last.String()
|
|
tic := "0"
|
|
//TODO: it is likely that the tic value will need to be added to an emitted event,
|
|
//so this will need to be updated at that point
|
|
transactionIndex := ethLog.TxIndex
|
|
|
|
rawJson, err := json.Marshal(ethLog)
|
|
if err != nil {
|
|
return TendModel{}, err
|
|
}
|
|
raw := string(rawJson)
|
|
|
|
return TendModel{
|
|
BidId: bidId.String(),
|
|
Lot: lot,
|
|
Bid: bidValue,
|
|
Guy: guy,
|
|
Tic: tic,
|
|
TransactionIndex: transactionIndex,
|
|
Raw: raw,
|
|
}, nil
|
|
}
|
|
|
|
func validateLog(ethLog types.Log) error {
|
|
if len(ethLog.Data) <= 0 {
|
|
return errors.New("tend log note data is empty")
|
|
}
|
|
|
|
if len(ethLog.Topics) < 4 {
|
|
return errors.New("tend log does not contain expected topics")
|
|
}
|
|
|
|
return nil
|
|
}
|