ipld-eth-server/pkg/transformers/vat_flux/converter.go
Rob Mulholand 867f92c431 (VDB-298) Consume Pit contract storage diffs
- Continuously parse storage diffs CSV data to read Pit contract state
- Convert ilks in database to raw bytes32 value for use in generating
  storage keys dynamically
- Persist storage diffs with block number and hash for validation
2019-02-06 10:31:46 -06:00

75 lines
2.0 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 vat_flux
import (
"encoding/json"
"errors"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
"math/big"
)
type VatFluxConverter struct{}
func (VatFluxConverter) ToModels(ethLogs []types.Log) ([]interface{}, error) {
var models []interface{}
for _, ethLog := range ethLogs {
err := verifyLog(ethLog)
if err != nil {
return nil, err
}
ilk := shared.GetHexWithoutPrefix(ethLog.Topics[1].Bytes())
src := common.BytesToAddress(ethLog.Topics[2].Bytes())
dst := common.BytesToAddress(ethLog.Topics[3].Bytes())
radBytes := shared.GetDataBytesAtIndex(-1, ethLog.Data)
rad := big.NewInt(0).SetBytes(radBytes).String()
if err != nil {
return nil, err
}
rawLogJson, err := json.Marshal(ethLog)
if err != nil {
return nil, err
}
model := VatFluxModel{
Ilk: ilk,
Src: src.String(),
Dst: dst.String(),
Rad: rad,
TransactionIndex: ethLog.TxIndex,
LogIndex: ethLog.Index,
Raw: rawLogJson,
}
models = append(models, model)
}
return models, nil
}
func verifyLog(log types.Log) error {
if len(log.Topics) < 4 {
return errors.New("log missing topics")
}
return nil
}