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eth/filters: go fmt and documentation

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This commit is contained in:
Nick Johnson 2016-12-14 11:33:49 +00:00
parent 2e6c4ebf1d
commit 8d26de87aa
1 changed files with 7 additions and 1 deletions
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8
eth/filters/filter.go
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@ -54,6 +54,8 @@ type Filter struct {
// New creates a new filter which uses a bloom filter on blocks to figure out whether // New creates a new filter which uses a bloom filter on blocks to figure out whether
// a particular block is interesting or not. // a particular block is interesting or not.
// MipMaps allow past blocks to be searched much more efficiently, and can be enabled
// any time a filter includes addresses to filter on.
func New(backend Backend, useMipMap bool) *Filter { func New(backend Backend, useMipMap bool) *Filter {
return &Filter{ return &Filter{
backend: backend, backend: backend,
@ -85,6 +87,10 @@ func (f *Filter) SetTopics(topics [][]common.Hash) {
f.topics = topics f.topics = topics
} }
// FindOnce searches the blockchain for matching log entries, returning
// all matching entries from the first block that contains matches,
// updating the start point of the filter accordingly. If no results are
// found, a nil slice is returned.
func (f *Filter) FindOnce(ctx context.Context) ([]*vm.Log, error) { func (f *Filter) FindOnce(ctx context.Context) ([]*vm.Log, error) {
head, _ := f.backend.HeaderByNumber(ctx, rpc.LatestBlockNumber) head, _ := f.backend.HeaderByNumber(ctx, rpc.LatestBlockNumber)
if head == nil { if head == nil {
@ -109,7 +115,7 @@ func (f *Filter) FindOnce(ctx context.Context) ([]*vm.Log, error) {
f.begin = int64(blockNumber + 1) f.begin = int64(blockNumber + 1)
return logs, err return logs, err
} }
logs, blockNumber := f.mipFind(beginBlockNo, endBlockNo, 0) logs, blockNumber := f.mipFind(beginBlockNo, endBlockNo, 0)
f.begin = int64(blockNumber + 1) f.begin = int64(blockNumber + 1)
return logs, nil return logs, nil