ipld-eth-server/pkg/transformers/bite/converter.go
Rob Mulholand d0226dbce5 Convert Bite event field types to numeric
- Enables arithmetic operations when constructing views
- Also removes application-level references to DB ID
2018-10-16 15:27:13 -05:00

93 lines
2.6 KiB
Go

/*
* Copyright 2018 Vulcanize
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package bite
import (
"encoding/json"
"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/vulcanize/vulcanizedb/pkg/geth"
"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
)
type Converter interface {
ToEntities(contractAbi string, ethLogs []types.Log) ([]BiteEntity, error)
ToModels(biteEntities []BiteEntity) ([]BiteModel, error)
}
type BiteConverter struct{}
func (BiteConverter) ToEntities(contractAbi string, ethLogs []types.Log) ([]BiteEntity, error) {
var entities []BiteEntity
for _, ethLog := range ethLogs {
entity := &BiteEntity{}
address := ethLog.Address
abi, err := geth.ParseAbi(contractAbi)
if err != nil {
return nil, err
}
contract := bind.NewBoundContract(address, abi, nil, nil, nil)
err = contract.UnpackLog(entity, "Bite", ethLog)
if err != nil {
return nil, err
}
entity.Raw = ethLog
entity.TransactionIndex = ethLog.TxIndex
entities = append(entities, *entity)
}
return entities, nil
}
func (converter BiteConverter) ToModels(entities []BiteEntity) ([]BiteModel, error) {
var models []BiteModel
for _, entity := range entities {
ilk := common.BytesToAddress(entity.Ilk[:common.AddressLength]).String()
urn := common.BytesToAddress(entity.Urn[:common.AddressLength]).String()
ink := entity.Ink
art := entity.Art
iArt := entity.IArt
tab := entity.Tab
flip := entity.Flip
txIdx := entity.TransactionIndex
rawLogJson, err := json.Marshal(entity.Raw)
rawLogString := string(rawLogJson)
if err != nil {
return nil, err
}
model := BiteModel{
Ilk: ilk,
Urn: urn,
Ink: shared.BigIntToString(ink),
Art: shared.BigIntToString(art),
IArt: shared.BigIntToString(iArt),
Tab: shared.BigIntToString(tab),
NFlip: shared.BigIntToString(flip),
TransactionIndex: txIdx,
Raw: rawLogString,
}
models = append(models, model)
}
return models, nil
}