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package processors
import (
"fmt"
"github.com/ethereum-optimism/optimism/op-service/eth"
ethTypes "github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/types/interoptypes"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum-optimism/optimism/op-supervisor/supervisor/backend/depset"
"github.com/ethereum-optimism/optimism/op-supervisor/supervisor/types"
)
type EventDecoderFn func(*ethTypes.Log, depset.ChainIndexFromID) (*types.ExecutingMessage, error)
func DecodeExecutingMessageLog(l *ethTypes.Log, depSet depset.ChainIndexFromID) (*types.ExecutingMessage, error) {
if l.Address != params.InteropCrossL2InboxAddress {
return nil, nil
}
if len(l.Topics) != 2 { // topics: event-id and payload-hash
return nil, nil
}
if l.Topics[0] != interoptypes.ExecutingMessageEventTopic {
return nil, nil
}
var msg interoptypes.Message
if err := msg.DecodeEvent(l.Topics, l.Data); err != nil {
return nil, fmt.Errorf("invalid executing message: %w", err)
}
logHash := types.PayloadHashToLogHash(msg.PayloadHash, msg.Identifier.Origin)
index, err := depSet.ChainIndexFromID(eth.ChainID(msg.Identifier.ChainID))
if err != nil {
return nil, err
}
return &types.ExecutingMessage{
Chain: index,
BlockNum: msg.Identifier.BlockNumber,
LogIdx: msg.Identifier.LogIndex,
Timestamp: msg.Identifier.Timestamp,
Hash: logHash,
}, nil
}