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core: use buffered ch for subscription #30350

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core: use buffered ch for subscription #30350

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2 changes: 1 addition & 1 deletion core/txindexer.go
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Original file line number Diff line number Diff line change
Expand Up @@ -132,7 +132,7 @@ func (indexer *txIndexer) loop(chain *BlockChain) {
lastHead uint64 // The latest announced chain head (whose tx indexes are assumed created)
lastTail = rawdb.ReadTxIndexTail(indexer.db) // The oldest indexed block, nil means nothing indexed

headCh = make(chan ChainHeadEvent)
headCh = make(chan ChainHeadEvent, 5)
sub = chain.SubscribeChainHeadEvent(headCh)
)
defer sub.Unsubscribe()
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