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e1e9de24df
Before this commit, we we were trying to sweep an anchor output, and that output was spent by someone else (not the sweeper), then we would report this back to the original resolver (allowing it to be cleaned up), and also remove the set of inputs spent by that transaction from the set we need to sweep. However, it's possible that if a user is spending unconfirmed outputs, then the wallet is holding onto an invalid transaction, as the outputs that were used as inputs have been double spent elsewhere. In this commit, we fix this issue by recursively removing all descendant transactions of our past sweeps that have an intersecting input set as the spending transaction. In cases where a user spent an unconfirmed output to funding a channel, and that output was a descendant of the now swept anchor output, the funds will now properly be marked as available. Fixes #6241
39 lines
1.5 KiB
Go
39 lines
1.5 KiB
Go
package sweep
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import (
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"github.com/btcsuite/btcd/chaincfg/chainhash"
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"github.com/btcsuite/btcd/wire"
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"github.com/lightningnetwork/lnd/lnwallet"
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)
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// Wallet contains all wallet related functionality required by sweeper.
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type Wallet interface {
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// PublishTransaction performs cursory validation (dust checks, etc) and
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// broadcasts the passed transaction to the Bitcoin network.
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PublishTransaction(tx *wire.MsgTx, label string) error
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// ListUnspentWitnessFromDefaultAccount returns all unspent outputs
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// which are version 0 witness programs from the default wallet account.
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// The 'minConfs' and 'maxConfs' parameters indicate the minimum
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// and maximum number of confirmations an output needs in order to be
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// returned by this method.
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ListUnspentWitnessFromDefaultAccount(minConfs, maxConfs int32) (
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[]*lnwallet.Utxo, error)
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// WithCoinSelectLock will execute the passed function closure in a
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// synchronized manner preventing any coin selection operations from
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// proceeding while the closure is executing. This can be seen as the
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// ability to execute a function closure under an exclusive coin
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// selection lock.
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WithCoinSelectLock(f func() error) error
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// RemoveDescendants removes any wallet transactions that spends
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// outputs created by the specified transaction.
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RemoveDescendants(*wire.MsgTx) error
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// FetchTx returns the transaction that corresponds to the transaction
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// hash passed in. If the transaction can't be found then a nil
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// transaction pointer is returned.
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FetchTx(chainhash.Hash) (*wire.MsgTx, error)
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}
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