85 lines
2.3 KiB
Go
85 lines
2.3 KiB
Go
// VulcanizeDB
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// Copyright © 2018 Vulcanize
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package chop_lump
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import (
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"bytes"
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"encoding/json"
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"errors"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
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"github.com/vulcanize/vulcanizedb/pkg/transformers/shared/constants"
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"math/big"
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)
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var (
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chop = "chop"
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lump = "lump"
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)
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type CatFileChopLumpConverter struct{}
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func (CatFileChopLumpConverter) ToModels(ethLogs []types.Log) ([]interface{}, error) {
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var results []interface{}
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for _, ethLog := range ethLogs {
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err := verifyLog(ethLog)
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if err != nil {
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return nil, err
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}
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ilk := string(bytes.Trim(ethLog.Topics[2].Bytes(), "\x00"))
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what := string(bytes.Trim(ethLog.Topics[3].Bytes(), "\x00"))
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dataBytes := ethLog.Data[len(ethLog.Data)-constants.DataItemLength:]
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data := big.NewInt(0).SetBytes(dataBytes).String()
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raw, err := json.Marshal(ethLog)
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if err != nil {
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return nil, err
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}
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result := CatFileChopLumpModel{
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Ilk: ilk,
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What: what,
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Data: convertData(what, data),
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TransactionIndex: ethLog.TxIndex,
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LogIndex: ethLog.Index,
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Raw: raw,
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}
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results = append(results, result)
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}
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return results, nil
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}
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func convertData(what, data string) string {
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var convertedData string
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if what == chop {
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convertedData = shared.ConvertToRay(data)
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} else if what == lump {
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convertedData = shared.ConvertToWad(data)
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}
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return convertedData
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}
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func verifyLog(log types.Log) error {
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if len(log.Topics) < 4 {
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return errors.New("log missing topics")
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}
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if len(log.Data) < constants.DataItemLength {
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return errors.New("log missing data")
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}
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return nil
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}
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