ipld-eth-server/libraries/shared/transformer/event_transformer.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/>.
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package transformer
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import (
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"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/vulcanize/vulcanizedb/libraries/shared/constants"
"github.com/vulcanize/vulcanizedb/pkg/core"
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"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
)
type EventTransformer interface {
Execute(logs []types.Log, header core.Header, recheckHeaders constants.TransformerExecution) error
GetConfig() EventTransformerConfig
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}
type EventTransformerInitializer func(db *postgres.DB) EventTransformer
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type EventTransformerConfig struct {
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TransformerName string
ContractAddresses []string
ContractAbi string
Topic string
StartingBlockNumber int64
EndingBlockNumber int64 // Set -1 for indefinite transformer
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}
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func HexToInt64(byteString string) int64 {
value := common.HexToHash(byteString)
return value.Big().Int64()
}
func HexToString(byteString string) string {
value := common.HexToHash(byteString)
return value.Big().String()
}
func HexStringsToAddresses(strings []string) (addresses []common.Address) {
for _, hexString := range strings {
addresses = append(addresses, common.HexToAddress(hexString))
}
return
}