ipld-eth-server/pkg/transformers/vat_grab/converter.go
Elizabeth 3baca64903 Update address formatting (#67)
* Add getSignatures command for list of signatures in constants

* Update VatTune converter's formatting of addresses

and added an integration test

* Move VatTune and PriceFeeds integration tests to a common suite

* Update VatGrab converter for address format

* Update frob converter to fix urn and ilk formatting/decoding

* Update formatting

* Update make test command and add integrationtest command

* Add integration test to travis build

* Update creating headers in integration tests to include Raw and Timestamp fields
2018-10-17 13:04:55 -05:00

64 lines
1.6 KiB
Go

package vat_grab
import (
"bytes"
"encoding/json"
"errors"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
"math/big"
)
type Converter interface {
ToModels(ethLogs []types.Log) ([]VatGrabModel, error)
}
type VatGrabConverter struct{}
func (VatGrabConverter) ToModels(ethLogs []types.Log) ([]VatGrabModel, error) {
var models []VatGrabModel
for _, ethLog := range ethLogs {
err := verifyLog(ethLog)
if err != nil {
return nil, err
}
ilk := string(bytes.Trim(ethLog.Topics[1].Bytes(), "\x00"))
urn := common.BytesToAddress(ethLog.Topics[2].Bytes())
v := common.BytesToAddress(ethLog.Topics[3].Bytes())
wBytes := shared.GetDataBytesAtIndex(-3, ethLog.Data)
w := common.BytesToAddress(wBytes)
dinkBytes := shared.GetDataBytesAtIndex(-2, ethLog.Data)
dink := big.NewInt(0).SetBytes(dinkBytes).String()
dartBytes := shared.GetDataBytesAtIndex(-1, ethLog.Data)
dart := big.NewInt(0).SetBytes(dartBytes).String()
raw, err := json.Marshal(ethLog)
if err != nil {
return nil, err
}
model := VatGrabModel{
Ilk: ilk,
Urn: urn.String(),
V: v.String(),
W: w.String(),
Dink: dink,
Dart: dart,
TransactionIndex: ethLog.TxIndex,
Raw: raw,
}
models = append(models, model)
}
return models, nil
}
func verifyLog(log types.Log) error {
if len(log.Topics) < 4 {
return errors.New("log missing topics")
}
if len(log.Data) < shared.DataItemLength {
return errors.New("log missing data")
}
return nil
}