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https://github.com/lightninglabs/loop.git
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d554b42ef6
Update LND, Aperture, and Taproot Assets to revisions using the btcd v2 modules, and update lndclient to v0.21.0-3. Migrate Loop chain, transaction, and address types to their corresponding v2 packages. The lndclient release includes the migration from: https://github.com/lightninglabs/lndclient/pull/280 Taproot Assets is temporarily replaced with its btcd v2 revision because the v0.8 release branch has not adopted the new modules. This raises the minimum Go version to 1.26 and changes exported address types.
80 lines
2.1 KiB
Go
80 lines
2.1 KiB
Go
package utils
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import (
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"fmt"
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"github.com/btcsuite/btcd/chaincfg/v2"
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"github.com/lightninglabs/loop/loopdb"
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"github.com/lightninglabs/loop/swap"
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"github.com/lightningnetwork/lnd/input"
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"github.com/lightningnetwork/lnd/lntypes"
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"github.com/lightningnetwork/lnd/zpay32"
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)
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// GetHtlc composes and returns the on-chain swap script.
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func GetHtlc(hash lntypes.Hash, contract *loopdb.SwapContract,
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chainParams *chaincfg.Params) (*swap.Htlc, error) {
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switch GetHtlcScriptVersion(contract.ProtocolVersion) {
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case swap.HtlcV2:
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return swap.NewHtlcV2(
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contract.CltvExpiry, contract.HtlcKeys.SenderScriptKey,
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contract.HtlcKeys.ReceiverScriptKey, hash,
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chainParams,
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)
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case swap.HtlcV3:
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// Swaps that implement the new MuSig2 protocol will be expected
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// to use the 1.0RC2 MuSig2 key derivation scheme.
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muSig2Version := input.MuSig2Version040
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if contract.ProtocolVersion >= loopdb.ProtocolVersionMuSig2 {
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muSig2Version = input.MuSig2Version100RC2
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}
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return swap.NewHtlcV3(
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muSig2Version,
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contract.CltvExpiry,
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contract.HtlcKeys.SenderInternalPubKey,
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contract.HtlcKeys.ReceiverInternalPubKey,
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contract.HtlcKeys.SenderScriptKey,
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contract.HtlcKeys.ReceiverScriptKey,
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hash, chainParams,
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)
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}
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return nil, swap.ErrInvalidScriptVersion
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}
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// GetHtlcScriptVersion returns the correct HTLC script version for the passed
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// protocol version.
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func GetHtlcScriptVersion(
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protocolVersion loopdb.ProtocolVersion) swap.ScriptVersion {
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// If the swap was initiated before we had our v3 script, use v2.
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if protocolVersion < loopdb.ProtocolVersionHtlcV3 ||
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protocolVersion == loopdb.ProtocolVersionUnrecorded {
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return swap.HtlcV2
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}
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return swap.HtlcV3
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}
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// ObtainSwapPaymentAddr will retrieve the payment addr from the passed invoice.
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func ObtainSwapPaymentAddr(swapInvoice string, chainParams *chaincfg.Params) (
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*[32]byte, error) {
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swapPayReq, err := zpay32.Decode(swapInvoice, chainParams)
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if err != nil {
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return nil, err
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}
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payAddr, err := swapPayReq.PaymentAddr.UnwrapOrErr(
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fmt.Errorf("expected payment address for invoice"),
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)
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if err != nil {
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return nil, err
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}
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return &payAddr, nil
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}
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