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chainntnfs: don't register notifications twice if details exist

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Oliver Gugger 2019-10-10 09:32:38 +02:00
parent e64493fe5b
commit 51c066e7ed
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1 changed files with 12 additions and 0 deletions
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12
chainntnfs/txnotifier.go
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@ -103,6 +103,9 @@ type confNtfnSet struct {
// details serves as a cache of the confirmation details of a
// transaction that we'll use to determine if a transaction/output
// script has already confirmed at the time of registration.
// details is also used to make sure that in case of an address reuse
// (funds sent to a previously confirmed script) no additional
// notification is registered which would lead to an inconsistent state.
details *TxConfirmation
}
@ -1507,6 +1510,15 @@ func (n *TxNotifier) handleConfDetailsAtTip(confRequest ConfRequest,
// TODO(wilmer): cancel pending historical rescans if any?
confSet := n.confNotifications[confRequest]
// If we already have details for this request, we don't want to add it
// again since we have already dispatched notifications for it.
if confSet.details != nil {
Log.Warnf("Ignoring address reuse for %s at height %d.",
confRequest, details.BlockHeight)
return
}
confSet.rescanStatus = rescanComplete
confSet.details = details