ipld-eth-server/pkg/transformers/vat_slip/converter.go

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// 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/>.
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package vat_slip
import (
"encoding/json"
"errors"
"github.com/ethereum/go-ethereum/core/types"
"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
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)
type VatSlipConverter struct{}
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func (VatSlipConverter) ToModels(ethLogs []types.Log) ([]interface{}, error) {
var models []interface{}
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for _, ethLog := range ethLogs {
err := verifyLog(ethLog)
if err != nil {
return nil, err
}
ilk := shared.GetHexWithoutPrefix(ethLog.Topics[1].Bytes())
guy := shared.GetHexWithoutPrefix(ethLog.Topics[2].Bytes())
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rad := ethLog.Topics[3].Big()
raw, err := json.Marshal(ethLog)
if err != nil {
return nil, err
}
model := VatSlipModel{
Ilk: ilk,
Guy: guy,
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Rad: rad.String(),
TransactionIndex: ethLog.TxIndex,
LogIndex: ethLog.Index,
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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
}