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eth/downloader, eth/filters: use defer to call Unsubscribe #28762

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merged 1 commit into from
Jan 5, 2024
Merged

eth/downloader, eth/filters: use defer to call Unsubscribe #28762

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3 changes: 1 addition & 2 deletions eth/downloader/api.go
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Original file line number Diff line number Diff line change
Expand Up @@ -101,16 +101,15 @@ func (api *DownloaderAPI) Syncing(ctx context.Context) (*rpc.Subscription, error
go func() {
statuses := make(chan interface{})
sub := api.SubscribeSyncStatus(statuses)
defer sub.Unsubscribe()

for {
select {
case status := <-statuses:
notifier.Notify(rpcSub.ID, status)
case <-rpcSub.Err():
sub.Unsubscribe()
return
case <-notifier.Closed():
sub.Unsubscribe()
return
}
}
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10 changes: 4 additions & 6 deletions eth/filters/api.go
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Original file line number Diff line number Diff line change
Expand Up @@ -159,6 +159,8 @@ func (api *FilterAPI) NewPendingTransactions(ctx context.Context, fullTx *bool)
go func() {
txs := make(chan []*types.Transaction, 128)
pendingTxSub := api.events.SubscribePendingTxs(txs)
defer pendingTxSub.Unsubscribe()

chainConfig := api.sys.backend.ChainConfig()

for {
Expand All @@ -176,10 +178,8 @@ func (api *FilterAPI) NewPendingTransactions(ctx context.Context, fullTx *bool)
}
}
case <-rpcSub.Err():
pendingTxSub.Unsubscribe()
return
case <-notifier.Closed():
pendingTxSub.Unsubscribe()
return
}
}
Expand Down Expand Up @@ -233,16 +233,15 @@ func (api *FilterAPI) NewHeads(ctx context.Context) (*rpc.Subscription, error) {
go func() {
headers := make(chan *types.Header)
headersSub := api.events.SubscribeNewHeads(headers)
defer headersSub.Unsubscribe()

for {
select {
case h := <-headers:
notifier.Notify(rpcSub.ID, h)
case <-rpcSub.Err():
headersSub.Unsubscribe()
return
case <-notifier.Closed():
headersSub.Unsubscribe()
return
}
}
Expand All @@ -267,6 +266,7 @@ func (api *FilterAPI) Logs(ctx context.Context, crit FilterCriteria) (*rpc.Subsc
if err != nil {
return nil, err
}
defer logsSub.Unsubscribe()
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should this move to the next go func?


go func() {
for {
Expand All @@ -277,10 +277,8 @@ func (api *FilterAPI) Logs(ctx context.Context, crit FilterCriteria) (*rpc.Subsc
notifier.Notify(rpcSub.ID, &log)
}
case <-rpcSub.Err(): // client send an unsubscribe request
logsSub.Unsubscribe()
return
case <-notifier.Closed(): // connection dropped
logsSub.Unsubscribe()
return
}
}
Expand Down