package lnwallet import ( "sync" "li.lan/labs/plasma/channeldb" "github.com/btcsuite/btcd/btcec" "github.com/btcsuite/btcd/wire" "github.com/btcsuite/btcutil" ) // ChannelContribution... type ChannelContribution struct { // Amount of funds contributed to the funding transaction. FundingAmount btcutil.Amount // Inputs to the funding transaction. Inputs []*wire.TxIn // Outputs to be used in the case that the total value of the fund // ing inputs is greather than the total potential channel capacity. ChangeOutputs []*wire.TxOut // The key to be used for the funding transaction's P2SH multi-sig // 2-of-2 output. MultiSigKey *btcec.PublicKey // The key to be used for this party's version of the commitment // transaction. CommitKey *btcec.PublicKey // Address to be used for delivery of cleared channel funds in the scenario // of a cooperative channel closure. DeliveryAddress btcutil.Address // Hash to be used as the revocation for the initial version of this // party's commitment transaction. RevocationHash [20]byte // The delay (in blocks) to be used for the pay-to-self output in this // party's version of the commitment transaction. CsvDelay uint32 } // ChannelReservation... type ChannelReservation struct { fundingType FundingType // This mutex MUST be held when either reading or modifying any of the // fields below. sync.RWMutex // For CLTV it is nLockTime, for CSV it's nSequence, for segwit it's // not needed fundingLockTime uint32 // In order of sorted inputs. Sorting is done in accordance // to BIP-69: https://github.com/bitcoin/bips/blob/master/bip-0069.mediawiki. ourFundingSigs [][]byte theirFundingSigs [][]byte // Our signature for their version of the commitment transaction. ourCommitmentSig []byte theirCommitmentSig []byte ourContribution *ChannelContribution theirContribution *ChannelContribution partialState *channeldb.OpenChannel // The ID of this reservation, used to uniquely track the reservation // throughout its lifetime. reservationID uint64 // A channel which will be sent on once the channel is considered // 'open'. A channel is open once the funding transaction has reached // a sufficient number of confirmations. chanOpen chan *LightningChannel wallet *LightningWallet } // newChannelReservation... func newChannelReservation(t FundingType, fundingAmt btcutil.Amount, minFeeRate btcutil.Amount, wallet *LightningWallet, id uint64) *ChannelReservation { // TODO(roasbeef): CSV here, or on delay? return &ChannelReservation{ fundingType: t, ourContribution: &ChannelContribution{ FundingAmount: fundingAmt, }, theirContribution: &ChannelContribution{ FundingAmount: fundingAmt, }, partialState: &channeldb.OpenChannel{ // TODO(roasbeef): assumes balanced symmetric channels. Capacity: fundingAmt * 2, OurBalance: fundingAmt, TheirBalance: fundingAmt, MinFeePerKb: minFeeRate, }, reservationID: id, wallet: wallet, } } // OurContribution... // NOTE: This SHOULD NOT be modified. func (r *ChannelReservation) OurContribution() *ChannelContribution { r.RLock() defer r.RUnlock() return r.ourContribution } // ProcessContribution... func (r *ChannelReservation) ProcessContribution(theirContribution *ChannelContribution) error { errChan := make(chan error, 1) r.wallet.msgChan <- &addContributionMsg{ pendingFundingID: r.reservationID, contribution: theirContribution, err: errChan, } return <-errChan } func (r *ChannelReservation) TheirContribution() *ChannelContribution { r.RLock() defer r.RUnlock() return r.theirContribution } // OurSignatures... func (r *ChannelReservation) OurSignatures() ([][]byte, []byte) { r.RLock() defer r.RUnlock() return r.ourFundingSigs, r.ourCommitmentSig } // CompleteFundingReservation... func (r *ChannelReservation) CompleteReservation(fundingSigs [][]byte, commitmentSig []byte) error { errChan := make(chan error, 1) r.wallet.msgChan <- &addCounterPartySigsMsg{ pendingFundingID: r.reservationID, theirFundingSigs: fundingSigs, theirCommitmentSig: commitmentSig, err: errChan, } return <-errChan } // OurSignatures... func (r *ChannelReservation) TheirSignatures() ([][]byte, []byte) { r.RLock() defer r.RUnlock() return r.theirFundingSigs, r.theirCommitmentSig } // FinalFundingTransaction... func (r *ChannelReservation) FinalFundingTx() *wire.MsgTx { r.RLock() defer r.RUnlock() return r.partialState.FundingTx } // RequestFundingReserveCancellation... func (r *ChannelReservation) Cancel() error { errChan := make(chan error, 1) r.wallet.msgChan <- &fundingReserveCancelMsg{ pendingFundingID: r.reservationID, err: errChan, } return <-errChan } // WaitForChannelOpen... func (r *ChannelReservation) WaitForChannelOpen() *LightningChannel { return nil } // * finish reset of tests // * comment out stuff that'll need a node. // * start on commitment side // * implement rusty's shachain // * set up logic to get notification from node when funding tx gets 6 deep. // * prob spawn into ChainNotifier struct // * create builder for initial funding transaction // * fascade through the wallet, for signing and such. // * channel should have active namespace to it's bucket, query at that point fo past commits etc