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84cc9a1f0b
In this commit, we make a new `AuxFundingController` interface capable of processing messages off the wire. In addition, we can use it to abstract away details w.r.t how we obtain a `AuxFundingDesc` for a given channel. We'll now use this whenever we get a channel funding request, to make sure we pass along the custom state that a channel may require.
52 lines
2.2 KiB
Go
52 lines
2.2 KiB
Go
package funding
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import (
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"github.com/btcsuite/btcd/chaincfg/chainhash"
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"github.com/lightningnetwork/lnd/fn"
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"github.com/lightningnetwork/lnd/lntypes"
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"github.com/lightningnetwork/lnd/lnwallet"
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"github.com/lightningnetwork/lnd/msgmux"
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)
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// AuxFundingDescResult is a type alias for a function that returns an optional
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// aux funding desc.
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type AuxFundingDescResult = fn.Result[fn.Option[lnwallet.AuxFundingDesc]]
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// AuxTapscriptResult is a type alias for a function that returns an optional
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// tapscript root.
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type AuxTapscriptResult = fn.Result[fn.Option[chainhash.Hash]]
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// AuxFundingController permits the implementation of the funding of custom
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// channels types. The controller serves as a MsgEndpoint which allows it to
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// intercept custom messages, or even the regular funding messages. The
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// controller might also pass along an aux funding desc based on an existing
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// pending channel ID.
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type AuxFundingController interface {
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// Endpoint is the embedded interface that signals that the funding
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// controller is also a message endpoint. This'll allow it to handle
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// custom messages specific to the funding type.
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msgmux.Endpoint
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// DescFromPendingChanID takes a pending channel ID, that may already be
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// known due to prior custom channel messages, and maybe returns an aux
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// funding desc which can be used to modify how a channel is funded.
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DescFromPendingChanID(pid PendingChanID, openChan lnwallet.AuxChanState,
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keyRing lntypes.Dual[lnwallet.CommitmentKeyRing],
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initiator bool) AuxFundingDescResult
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// DeriveTapscriptRoot takes a pending channel ID and maybe returns a
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// tapscript root that should be used when creating any MuSig2 sessions
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// for a channel.
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DeriveTapscriptRoot(PendingChanID) AuxTapscriptResult
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// ChannelReady is called when a channel has been fully opened (multiple
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// confirmations) and is ready to be used. This can be used to perform
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// any final setup or cleanup.
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ChannelReady(openChan lnwallet.AuxChanState) error
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// ChannelFinalized is called when a channel has been fully finalized.
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// In this state, we've received the commitment sig from the remote
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// party, so we are safe to broadcast the funding transaction.
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ChannelFinalized(PendingChanID) error
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}
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