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eth, les, light: filter on logs only, derive receipts on demand

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Péter Szilágyi
2018-02-22 12:48:14 +02:00
parent 4535247793
commit 5cf1d35470
8 changed files with 123 additions and 17 deletions
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19
eth/filters/filter.go
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@ -34,6 +34,7 @@ type Backend interface {
EventMux() *event.TypeMux
HeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Header, error)
GetReceipts(ctx context.Context, blockHash common.Hash) (types.Receipts, error)
GetLogs(ctx context.Context, blockHash common.Hash) ([][]*types.Log, error)
SubscribeTxPreEvent(chan<- core.TxPreEvent) event.Subscription
SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription
@ -201,16 +202,28 @@ func (f *Filter) unindexedLogs(ctx context.Context, end uint64) ([]*types.Log, e
// match the filter criteria. This function is called when the bloom filter signals a potential match.
func (f *Filter) checkMatches(ctx context.Context, header *types.Header) (logs []*types.Log, err error) {
// Get the logs of the block
receipts, err := f.backend.GetReceipts(ctx, header.Hash())
logsList, err := f.backend.GetLogs(ctx, header.Hash())
if err != nil {
return nil, err
}
var unfiltered []*types.Log
for _, receipt := range receipts {
unfiltered = append(unfiltered, receipt.Logs...)
for _, logs := range logsList {
unfiltered = append(unfiltered, logs...)
}
logs = filterLogs(unfiltered, nil, nil, f.addresses, f.topics)
if len(logs) > 0 {
// We have matching logs, check if we need to resolve full logs via the light client
if logs[0].TxHash == (common.Hash{}) {
receipts, err := f.backend.GetReceipts(ctx, header.Hash())
if err != nil {
return nil, err
}
unfiltered = unfiltered[:0]
for _, receipt := range receipts {
unfiltered = append(unfiltered, receipt.Logs...)
}
logs = filterLogs(unfiltered, nil, nil, f.addresses, f.topics)
}
return logs, nil
}
return nil, nil