set FromBlock to latest

evmrpc/subscribe.go

@@ -147,14 +147,14 @@ func (a *SubscriptionAPI) Logs(ctx context.Context, filter *filters.FilterCriter
 	if filter == nil {
 		filter = &filters.FilterCriteria{}
 	}
-
 	// when fromBlock is 0 and toBlock is latest, adjust the filter
 	// to unbounded filter
 	if filter.FromBlock != nil && filter.FromBlock.Int64() == 0 &&
 		filter.ToBlock != nil && filter.ToBlock.Int64() < 0 {
+		latest := big.NewInt(a.logFetcher.ctxProvider(LatestCtxHeight).BlockHeight())
 		unboundedFilter := &filters.FilterCriteria{
-			FromBlock: filter.FromBlock, // keep "0x0" to fetch historical logs
-			ToBlock:   nil,              // set to nil to continue listening
+			FromBlock: latest, // set to latest block height
+			ToBlock:   nil,    // set to nil to continue listening
 			Addresses: filter.Addresses,
 			Topics:    filter.Topics,
 		}