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eth/filters: move inner function as private method

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Signed-off-by: jsvisa <delweng@gmail.com>
This commit is contained in:
jsvisa 2023-06-11 16:58:34 +08:00
parent 964e801961
commit 2c0ca046b5
1 changed files with 110 additions and 107 deletions
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43
eth/filters/api.go
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@ -261,7 +261,7 @@ func (api *FilterAPI) NewHeads(ctx context.Context) (*rpc.Subscription, error) {
return rpcSub, nil
}
type notify interface {
type notifier interface {
Notify(id rpc.ID, data interface{}) error
Closed() <-chan interface{}
}
@ -277,8 +277,8 @@ func (api *FilterAPI) Logs(ctx context.Context, crit FilterCriteria) (*rpc.Subsc
return rpcSub, err
}
func (api *FilterAPI) logs(ctx context.Context, notifier notify, rpcSub *rpc.Subscription, crit FilterCriteria) error {
filterLiveLogs := func() error {
// liveLogs only retrieves live logs
func (api *FilterAPI) liveLogs(ctx context.Context, notify notifier, rpcSub *rpc.Subscription, crit FilterCriteria) error {
matchedLogs := make(chan []*types.Log)
logsSub, err := api.events.SubscribeLogs(ethereum.FilterQuery(crit), matchedLogs)
if err != nil {
@ -291,36 +291,28 @@ func (api *FilterAPI) logs(ctx context.Context, notifier notify, rpcSub *rpc.Sub
case logs := <-matchedLogs:
for _, log := range logs {
log := log
notifier.Notify(rpcSub.ID, &log)
notify.Notify(rpcSub.ID, &log)
}
case <-rpcSub.Err(): // client send an unsubscribe request
logsSub.Unsubscribe()
return
case <-notifier.Closed(): // connection dropped
case <-notify.Closed(): // connection dropped
logsSub.Unsubscribe()
return
}
}
}()
return nil
}
}
isLiveFilter := true
if crit.FromBlock != nil {
isLiveFilter = crit.FromBlock.Sign() < 0
}
// do live filter only
if isLiveFilter {
err := filterLiveLogs()
return err
}
filterHistLogs := func(n int64) (int64, error) {
// histLogs only retrieves the logs older than current header
func (api *FilterAPI) histLogs(ctx context.Context, notifier notifier, rpcSub *rpc.Subscription, crit FilterCriteria) (int64, error) {
// the ctx will be canceled after this callback(filter.Logs) is called
// and we are run in a background goroutine, use a new context instead
var (
cctx = context.Background()
rmLogsCh = make(chan []*types.Log)
n = crit.FromBlock.Int64()
)
for {
// get the latest block header
@ -388,12 +380,23 @@ func (api *FilterAPI) logs(ctx context.Context, notifier notify, rpcSub *rpc.Sub
// move forward to the next batch
n = head + 1
}
}
// logs is the inner implmention of logs filter
func (api *FilterAPI) logs(ctx context.Context, notifier notifier, rpcSub *rpc.Subscription, crit FilterCriteria) error {
isLiveFilter := true
if crit.FromBlock != nil {
isLiveFilter = crit.FromBlock.Sign() < 0
}
// do live filter only
if isLiveFilter {
return api.liveLogs(ctx, notifier, rpcSub, crit)
}
n := crit.FromBlock.Int64()
go func() {
// do historical sync first
head, err := filterHistLogs(n)
head, err := api.histLogs(ctx, notifier, rpcSub, crit)
if err != nil {
return
}
@ -402,7 +405,7 @@ func (api *FilterAPI) logs(ctx context.Context, notifier notify, rpcSub *rpc.Sub
return
}
// then subscribe from the header
filterLiveLogs()
api.liveLogs(ctx, notifier, rpcSub, crit)
}()
return nil
}