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converter.go
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converter.go
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// VulcanizeDB
// Copyright © 2019 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 shared
import (
"errors"
"fmt"
"github.com/ethereum/go-ethereum/core/types"
"github.com/vulcanize/vulcanizedb/libraries/shared/constants"
"github.com/vulcanize/vulcanizedb/pkg/core"
)
var (
ErrLogMissingTopics = func(expectedNumTopics, actualNumTopics int) error {
return fmt.Errorf("log missing topics: has %d, want %d", actualNumTopics, expectedNumTopics)
}
ErrLogMissingData = errors.New("log missing data")
ErrCouldNotCreateFK = func(err error) error {
return fmt.Errorf("converter could not create FK: %v", err)
}
)
// TODO purge when everything moved to vDB interface
type Converter interface {
ToModels(contractAbi string, ethLog []core.HeaderSyncLog) ([]InsertionModel, error)
}
func VerifyLog(log types.Log, expectedNumTopics int, isDataRequired bool) error {
actualNumTopics := len(log.Topics)
if actualNumTopics < expectedNumTopics {
return ErrLogMissingTopics(expectedNumTopics, actualNumTopics)
}
if isDataRequired && len(log.Data) < constants.DataItemLength {
return ErrLogMissingData
}
return nil
}