15736109134

Committed 18 Jun 2025 02:46PM UTC coverage: 58.197% (-10.1%) from 68.248%

Build # 15736109134

Build Type

Pull #9752

github

Committed by

web-flow

Commit Message

Merge d2634a68c into 31c74f20f

Pull Request Pull Request #9752: routerrpc: reject payment to invoice that don't have payment secret or blinded paths

Run Details

6 of 13 new or added lines in 2 files covered. (46.15%)

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Source File
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0.0

/lnwire/test_message.go

package lnwire

import (
        "bytes"
        "fmt"
        "image/color"
        "math"

        "github.com/btcsuite/btcd/btcec/v2"
        "github.com/btcsuite/btcd/btcutil"
        "github.com/btcsuite/btcd/chaincfg/chainhash"
        "github.com/lightningnetwork/lnd/fn/v2"
        "github.com/lightningnetwork/lnd/lnwallet/chainfee"
        "github.com/lightningnetwork/lnd/tlv"
        "github.com/stretchr/testify/require"
        "pgregory.net/rapid"
)

// TestMessage is an interface that extends the base Message interface with a
// method to populate the message with random testing data.
type TestMessage interface {
        Message

        // RandTestMessage populates the message with random data suitable for
        // testing. It uses the rapid testing framework to generate random
        // values.
        RandTestMessage(t *rapid.T) Message
}

// A compile time check to ensure AcceptChannel implements the TestMessage
// interface.
var _ TestMessage = (*AcceptChannel)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (a *AcceptChannel) RandTestMessage(t *rapid.T) Message {
        var pendingChanID [32]byte
        pendingChanIDBytes := rapid.SliceOfN(rapid.Byte(), 32, 32).Draw(
                t, "pendingChanID",
        )
        copy(pendingChanID[:], pendingChanIDBytes)

        var channelType *ChannelType
        includeChannelType := rapid.Bool().Draw(t, "includeChannelType")
        includeLeaseExpiry := rapid.Bool().Draw(t, "includeLeaseExpiry")
        includeLocalNonce := rapid.Bool().Draw(t, "includeLocalNonce")

        if includeChannelType {
                channelType = RandChannelType(t)
        }

        var leaseExpiry *LeaseExpiry
        if includeLeaseExpiry {
                leaseExpiry = RandLeaseExpiry(t)
        }

        var localNonce OptMusig2NonceTLV
        if includeLocalNonce {
                nonce := RandMusig2Nonce(t)
                localNonce = tlv.SomeRecordT(
                        tlv.NewRecordT[NonceRecordTypeT, Musig2Nonce](nonce),
                )
        }

        return &AcceptChannel{
                PendingChannelID: pendingChanID,
                DustLimit: btcutil.Amount(
                        rapid.IntRange(100, 1000).Draw(t, "dustLimit"),
                ),
                MaxValueInFlight: MilliSatoshi(
                        rapid.IntRange(10000, 1000000).Draw(
                                t, "maxValueInFlight",
                        ),
                ),
                ChannelReserve: btcutil.Amount(
                        rapid.IntRange(1000, 10000).Draw(t, "channelReserve"),
                ),
                HtlcMinimum: MilliSatoshi(
                        rapid.IntRange(1, 1000).Draw(t, "htlcMinimum"),
                ),
                MinAcceptDepth: uint32(
                        rapid.IntRange(1, 10).Draw(t, "minAcceptDepth"),
                ),
                CsvDelay: uint16(
                        rapid.IntRange(144, 1000).Draw(t, "csvDelay"),
                ),
                MaxAcceptedHTLCs: uint16(
                        rapid.IntRange(10, 500).Draw(t, "maxAcceptedHTLCs"),
                ),
                FundingKey:            RandPubKey(t),
                RevocationPoint:       RandPubKey(t),
                PaymentPoint:          RandPubKey(t),
                DelayedPaymentPoint:   RandPubKey(t),
                HtlcPoint:             RandPubKey(t),
                FirstCommitmentPoint:  RandPubKey(t),
                UpfrontShutdownScript: RandDeliveryAddress(t),
                ChannelType:           channelType,
                LeaseExpiry:           leaseExpiry,
                LocalNonce:            localNonce,
                ExtraData:             RandExtraOpaqueData(t, nil),
        }
}

// A compile time check to ensure AnnounceSignatures1 implements the
// lnwire.TestMessage interface.
var _ TestMessage = (*AnnounceSignatures1)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (a *AnnounceSignatures1) RandTestMessage(t *rapid.T) Message {
        return &AnnounceSignatures1{
                ChannelID:        RandChannelID(t),
                ShortChannelID:   RandShortChannelID(t),
                NodeSignature:    RandSignature(t),
                BitcoinSignature: RandSignature(t),
                ExtraOpaqueData:  RandExtraOpaqueData(t, nil),
        }
}

// A compile time check to ensure AnnounceSignatures2 implements the
// lnwire.TestMessage interface.
var _ TestMessage = (*AnnounceSignatures2)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (a *AnnounceSignatures2) RandTestMessage(t *rapid.T) Message {
        return &AnnounceSignatures2{
                ChannelID:        RandChannelID(t),
                ShortChannelID:   RandShortChannelID(t),
                PartialSignature: *RandPartialSig(t),
                ExtraOpaqueData:  RandExtraOpaqueData(t, nil),
        }
}

// A compile time check to ensure ChannelAnnouncement1 implements the
// TestMessage interface.
var _ TestMessage = (*ChannelAnnouncement1)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (a *ChannelAnnouncement1) RandTestMessage(t *rapid.T) Message {
        // Generate Node IDs and Bitcoin keys (compressed public keys)
        node1PubKey := RandPubKey(t)
        node2PubKey := RandPubKey(t)
        bitcoin1PubKey := RandPubKey(t)
        bitcoin2PubKey := RandPubKey(t)

        // Convert to byte arrays
        var nodeID1, nodeID2, bitcoinKey1, bitcoinKey2 [33]byte
        copy(nodeID1[:], node1PubKey.SerializeCompressed())
        copy(nodeID2[:], node2PubKey.SerializeCompressed())
        copy(bitcoinKey1[:], bitcoin1PubKey.SerializeCompressed())
        copy(bitcoinKey2[:], bitcoin2PubKey.SerializeCompressed())

        // Ensure nodeID1 is numerically less than nodeID2
        // This is a requirement stated in the field description
        if bytes.Compare(nodeID1[:], nodeID2[:]) > 0 {
                nodeID1, nodeID2 = nodeID2, nodeID1
        }

        // Generate chain hash
        chainHash := RandChainHash(t)
        var hash chainhash.Hash
        copy(hash[:], chainHash[:])

        return &ChannelAnnouncement1{
                NodeSig1:        RandSignature(t),
                NodeSig2:        RandSignature(t),
                BitcoinSig1:     RandSignature(t),
                BitcoinSig2:     RandSignature(t),
                Features:        RandFeatureVector(t),
                ChainHash:       hash,
                ShortChannelID:  RandShortChannelID(t),
                NodeID1:         nodeID1,
                NodeID2:         nodeID2,
                BitcoinKey1:     bitcoinKey1,
                BitcoinKey2:     bitcoinKey2,
                ExtraOpaqueData: RandExtraOpaqueData(t, nil),
        }
}

// A compile time check to ensure ChannelAnnouncement2 implements the
// lnwire.TestMessage interface.
var _ TestMessage = (*ChannelAnnouncement2)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (c *ChannelAnnouncement2) RandTestMessage(t *rapid.T) Message {
        features := RandFeatureVector(t)
        shortChanID := RandShortChannelID(t)
        capacity := uint64(rapid.IntRange(1, 16777215).Draw(t, "capacity"))

        var nodeID1, nodeID2 [33]byte
        copy(nodeID1[:], RandPubKey(t).SerializeCompressed())
        copy(nodeID2[:], RandPubKey(t).SerializeCompressed())

        // Make sure nodeID1 is numerically less than nodeID2 (as per spec).
        if bytes.Compare(nodeID1[:], nodeID2[:]) > 0 {
                nodeID1, nodeID2 = nodeID2, nodeID1
        }

        chainHash := RandChainHash(t)
        var chainHashObj chainhash.Hash
        copy(chainHashObj[:], chainHash[:])

        msg := &ChannelAnnouncement2{
                Signature: RandSignature(t),
                ChainHash: tlv.NewPrimitiveRecord[tlv.TlvType0, chainhash.Hash](
                        chainHashObj,
                ),
                Features: tlv.NewRecordT[tlv.TlvType2, RawFeatureVector](
                        *features,
                ),
                ShortChannelID: tlv.NewRecordT[tlv.TlvType4, ShortChannelID](
                        shortChanID,
                ),
                Capacity: tlv.NewPrimitiveRecord[tlv.TlvType6, uint64](
                        capacity,
                ),
                NodeID1: tlv.NewPrimitiveRecord[tlv.TlvType8, [33]byte](
                        nodeID1,
                ),
                NodeID2: tlv.NewPrimitiveRecord[tlv.TlvType10, [33]byte](
                        nodeID2,
                ),
                ExtraOpaqueData: RandExtraOpaqueData(t, nil),
        }

        msg.Signature.ForceSchnorr()

        // Randomly include optional fields
        if rapid.Bool().Draw(t, "includeBitcoinKey1") {
                var bitcoinKey1 [33]byte
                copy(bitcoinKey1[:], RandPubKey(t).SerializeCompressed())
                msg.BitcoinKey1 = tlv.SomeRecordT(
                        tlv.NewPrimitiveRecord[tlv.TlvType12, [33]byte](
                                bitcoinKey1,
                        ),
                )
        }

        if rapid.Bool().Draw(t, "includeBitcoinKey2") {
                var bitcoinKey2 [33]byte
                copy(bitcoinKey2[:], RandPubKey(t).SerializeCompressed())
                msg.BitcoinKey2 = tlv.SomeRecordT(
                        tlv.NewPrimitiveRecord[tlv.TlvType14, [33]byte](
                                bitcoinKey2,
                        ),
                )
        }

        if rapid.Bool().Draw(t, "includeMerkleRootHash") {
                hash := RandSHA256Hash(t)
                var merkleRootHash [32]byte
                copy(merkleRootHash[:], hash[:])
                msg.MerkleRootHash = tlv.SomeRecordT(
                        tlv.NewPrimitiveRecord[tlv.TlvType16, [32]byte](
                                merkleRootHash,
                        ),
                )
        }

        return msg
}

// A compile time check to ensure ChannelReady implements the lnwire.TestMessage
// interface.
var _ TestMessage = (*ChannelReady)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (c *ChannelReady) RandTestMessage(t *rapid.T) Message {
        msg := &ChannelReady{
                ChanID:                 RandChannelID(t),
                NextPerCommitmentPoint: RandPubKey(t),
                ExtraData:              RandExtraOpaqueData(t, nil),
        }

        includeAliasScid := rapid.Bool().Draw(t, "includeAliasScid")
        includeNextLocalNonce := rapid.Bool().Draw(t, "includeNextLocalNonce")
        includeAnnouncementNodeNonce := rapid.Bool().Draw(
                t, "includeAnnouncementNodeNonce",
        )
        includeAnnouncementBitcoinNonce := rapid.Bool().Draw(
                t, "includeAnnouncementBitcoinNonce",
        )

        if includeAliasScid {
                scid := RandShortChannelID(t)
                msg.AliasScid = &scid
        }

        if includeNextLocalNonce {
                nonce := RandMusig2Nonce(t)
                msg.NextLocalNonce = SomeMusig2Nonce(nonce)
        }

        if includeAnnouncementNodeNonce {
                nonce := RandMusig2Nonce(t)
                msg.AnnouncementNodeNonce = tlv.SomeRecordT(
                        tlv.NewRecordT[tlv.TlvType0, Musig2Nonce](nonce),
                )
        }

        if includeAnnouncementBitcoinNonce {
                nonce := RandMusig2Nonce(t)
                msg.AnnouncementBitcoinNonce = tlv.SomeRecordT(
                        tlv.NewRecordT[tlv.TlvType2, Musig2Nonce](nonce),
                )
        }

        return msg
}

// A compile time check to ensure ChannelReestablish implements the
// lnwire.TestMessage interface.
var _ TestMessage = (*ChannelReestablish)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (a *ChannelReestablish) RandTestMessage(t *rapid.T) Message {
        msg := &ChannelReestablish{
                ChanID: RandChannelID(t),
                NextLocalCommitHeight: rapid.Uint64().Draw(
                        t, "nextLocalCommitHeight",
                ),
                RemoteCommitTailHeight: rapid.Uint64().Draw(
                        t, "remoteCommitTailHeight",
                ),
                LastRemoteCommitSecret:    RandPaymentPreimage(t),
                LocalUnrevokedCommitPoint: RandPubKey(t),
                ExtraData:                 RandExtraOpaqueData(t, nil),
        }

        // Randomly decide whether to include optional fields
        includeLocalNonce := rapid.Bool().Draw(t, "includeLocalNonce")
        includeDynHeight := rapid.Bool().Draw(t, "includeDynHeight")

        if includeLocalNonce {
                nonce := RandMusig2Nonce(t)
                msg.LocalNonce = SomeMusig2Nonce(nonce)
        }

        if includeDynHeight {
                height := DynHeight(rapid.Uint64().Draw(t, "dynHeight"))
                msg.DynHeight = fn.Some(height)
        }

        return msg
}

// A compile time check to ensure ChannelUpdate1 implements the TestMessage
// interface.
var _ TestMessage = (*ChannelUpdate1)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (a *ChannelUpdate1) RandTestMessage(t *rapid.T) Message {
        // Generate random message flags
        // Randomly decide whether to include max HTLC field
        includeMaxHtlc := rapid.Bool().Draw(t, "includeMaxHtlc")
        var msgFlags ChanUpdateMsgFlags
        if includeMaxHtlc {
                msgFlags |= ChanUpdateRequiredMaxHtlc
        }

        // Generate random channel flags
        // Randomly decide direction (node1 or node2)
        isNode2 := rapid.Bool().Draw(t, "isNode2")
        var chanFlags ChanUpdateChanFlags
        if isNode2 {
                chanFlags |= ChanUpdateDirection
        }

        // Randomly decide if channel is disabled
        isDisabled := rapid.Bool().Draw(t, "isDisabled")
        if isDisabled {
                chanFlags |= ChanUpdateDisabled
        }

        // Generate chain hash
        chainHash := RandChainHash(t)
        var hash chainhash.Hash
        copy(hash[:], chainHash[:])

        // Generate other random fields
        maxHtlc := MilliSatoshi(rapid.Uint64().Draw(t, "maxHtlc"))

        // If max HTLC flag is not set, we need to zero the value
        if !includeMaxHtlc {
                maxHtlc = 0
        }

        // Randomly decide if an inbound fee should be included.
        // By default, our extra opaque data will just be random TLV but if we
        // include an inbound fee, then we will also set the record in the
        // extra opaque data.
        var (
                customRecords, _ = RandCustomRecords(t, nil, false)
                inboundFee       tlv.OptionalRecordT[tlv.TlvType55555, Fee]
        )
        includeInboundFee := rapid.Bool().Draw(t, "includeInboundFee")
        if includeInboundFee {
                if customRecords == nil {
                        customRecords = make(CustomRecords)
                }

                inFeeBase := int32(
                        rapid.IntRange(-1000, 1000).Draw(t, "inFeeBase"),
                )
                inFeeProp := int32(
                        rapid.IntRange(-1000, 1000).Draw(t, "inFeeProp"),
                )
                fee := Fee{
                        BaseFee: inFeeBase,
                        FeeRate: inFeeProp,
                }
                inboundFee = tlv.SomeRecordT(
                        tlv.NewRecordT[tlv.TlvType55555, Fee](fee),
                )

                var b bytes.Buffer
                feeRecord := fee.Record()
                err := feeRecord.Encode(&b)
                require.NoError(t, err)

                customRecords[uint64(FeeRecordType)] = b.Bytes()
        }

        extraBytes, err := customRecords.Serialize()
        require.NoError(t, err)

        return &ChannelUpdate1{
                Signature:      RandSignature(t),
                ChainHash:      hash,
                ShortChannelID: RandShortChannelID(t),
                Timestamp: uint32(rapid.IntRange(0, 0x7FFFFFFF).Draw(
                        t, "timestamp"),
                ),
                MessageFlags: msgFlags,
                ChannelFlags: chanFlags,
                TimeLockDelta: uint16(rapid.IntRange(0, 65535).Draw(
                        t, "timelockDelta"),
                ),
                HtlcMinimumMsat: MilliSatoshi(rapid.Uint64().Draw(
                        t, "htlcMinimum"),
                ),
                BaseFee: uint32(rapid.IntRange(0, 0x7FFFFFFF).Draw(
                        t, "baseFee"),
                ),
                FeeRate: uint32(rapid.IntRange(0, 0x7FFFFFFF).Draw(
                        t, "feeRate"),
                ),
                HtlcMaximumMsat: maxHtlc,
                InboundFee:      inboundFee,
                ExtraOpaqueData: extraBytes,
        }
}

// A compile time check to ensure ChannelUpdate2 implements the
// lnwire.TestMessage interface.
var _ TestMessage = (*ChannelUpdate2)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (c *ChannelUpdate2) RandTestMessage(t *rapid.T) Message {
        shortChanID := RandShortChannelID(t)
        blockHeight := uint32(rapid.IntRange(0, 1000000).Draw(t, "blockHeight"))

        var disabledFlags ChanUpdateDisableFlags
        if rapid.Bool().Draw(t, "disableIncoming") {
                disabledFlags |= ChanUpdateDisableIncoming
        }
        if rapid.Bool().Draw(t, "disableOutgoing") {
                disabledFlags |= ChanUpdateDisableOutgoing
        }

        cltvExpiryDelta := uint16(rapid.IntRange(10, 200).Draw(
                t, "cltvExpiryDelta"),
        )

        htlcMinMsat := MilliSatoshi(rapid.IntRange(1, 10000).Draw(
                t, "htlcMinMsat"),
        )
        htlcMaxMsat := MilliSatoshi(rapid.IntRange(10000, 100000000).Draw(
                t, "htlcMaxMsat"),
        )
        feeBaseMsat := uint32(rapid.IntRange(0, 10000).Draw(t, "feeBaseMsat"))
        feeProportionalMillionths := uint32(rapid.IntRange(0, 10000).Draw(
                t, "feeProportionalMillionths"),
        )

        chainHash := RandChainHash(t)
        var chainHashObj chainhash.Hash
        copy(chainHashObj[:], chainHash[:])

        //nolint:ll
        msg := &ChannelUpdate2{
                Signature: RandSignature(t),
                ChainHash: tlv.NewPrimitiveRecord[tlv.TlvType0, chainhash.Hash](
                        chainHashObj,
                ),
                ShortChannelID: tlv.NewRecordT[tlv.TlvType2, ShortChannelID](
                        shortChanID,
                ),
                BlockHeight: tlv.NewPrimitiveRecord[tlv.TlvType4, uint32](
                        blockHeight,
                ),
                DisabledFlags: tlv.NewPrimitiveRecord[tlv.TlvType6, ChanUpdateDisableFlags]( //nolint:ll
                        disabledFlags,
                ),
                CLTVExpiryDelta: tlv.NewPrimitiveRecord[tlv.TlvType10, uint16](
                        cltvExpiryDelta,
                ),
                HTLCMinimumMsat: tlv.NewPrimitiveRecord[tlv.TlvType12, MilliSatoshi](
                        htlcMinMsat,
                ),
                HTLCMaximumMsat: tlv.NewPrimitiveRecord[tlv.TlvType14, MilliSatoshi](
                        htlcMaxMsat,
                ),
                FeeBaseMsat: tlv.NewPrimitiveRecord[tlv.TlvType16, uint32](
                        feeBaseMsat,
                ),
                FeeProportionalMillionths: tlv.NewPrimitiveRecord[tlv.TlvType18, uint32](
                        feeProportionalMillionths,
                ),
                ExtraOpaqueData: RandExtraOpaqueData(t, nil),
        }

        msg.Signature.ForceSchnorr()

        if rapid.Bool().Draw(t, "isSecondPeer") {
                msg.SecondPeer = tlv.SomeRecordT(
                        tlv.RecordT[tlv.TlvType8, TrueBoolean]{},
                )
        }

        return msg
}

// A compile time check to ensure ClosingComplete implements the
// lnwire.TestMessage interface.
var _ TestMessage = (*ClosingComplete)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (c *ClosingComplete) RandTestMessage(t *rapid.T) Message {
        msg := &ClosingComplete{
                ChannelID: RandChannelID(t),
                FeeSatoshis: btcutil.Amount(rapid.Int64Range(0, 1000000).Draw(
                        t, "feeSatoshis"),
                ),
                LockTime: rapid.Uint32Range(0, 0xffffffff).Draw(
                        t, "lockTime",
                ),
                CloseeScript: RandDeliveryAddress(t),
                CloserScript: RandDeliveryAddress(t),
                ExtraData:    RandExtraOpaqueData(t, nil),
        }

        includeCloserNoClosee := rapid.Bool().Draw(t, "includeCloserNoClosee")
        includeNoCloserClosee := rapid.Bool().Draw(t, "includeNoCloserClosee")
        includeCloserAndClosee := rapid.Bool().Draw(t, "includeCloserAndClosee")

        // Ensure at least one signature is present.
        if !includeCloserNoClosee && !includeNoCloserClosee &&
                !includeCloserAndClosee {

                // If all are false, enable at least one randomly.
                choice := rapid.IntRange(0, 2).Draw(t, "sigChoice")
                switch choice {
                case 0:
                        includeCloserNoClosee = true
                case 1:
                        includeNoCloserClosee = true
                case 2:
                        includeCloserAndClosee = true
                }
        }

        if includeCloserNoClosee {
                sig := RandSignature(t)
                msg.CloserNoClosee = tlv.SomeRecordT(
                        tlv.NewRecordT[tlv.TlvType1, Sig](sig),
                )
        }

        if includeNoCloserClosee {
                sig := RandSignature(t)
                msg.NoCloserClosee = tlv.SomeRecordT(
                        tlv.NewRecordT[tlv.TlvType2, Sig](sig),
                )
        }

        if includeCloserAndClosee {
                sig := RandSignature(t)
                msg.CloserAndClosee = tlv.SomeRecordT(
                        tlv.NewRecordT[tlv.TlvType3, Sig](sig),
                )
        }

        return msg
}

// A compile time check to ensure ClosingSig implements the lnwire.TestMessage
// interface.
var _ TestMessage = (*ClosingSig)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (c *ClosingSig) RandTestMessage(t *rapid.T) Message {
        msg := &ClosingSig{
                ChannelID:    RandChannelID(t),
                CloseeScript: RandDeliveryAddress(t),
                CloserScript: RandDeliveryAddress(t),
                ExtraData:    RandExtraOpaqueData(t, nil),
        }

        includeCloserNoClosee := rapid.Bool().Draw(t, "includeCloserNoClosee")
        includeNoCloserClosee := rapid.Bool().Draw(t, "includeNoCloserClosee")
        includeCloserAndClosee := rapid.Bool().Draw(t, "includeCloserAndClosee")

        // Ensure at least one signature is present.
        if !includeCloserNoClosee && !includeNoCloserClosee &&
                !includeCloserAndClosee {

                // If all are false, enable at least one randomly.
                choice := rapid.IntRange(0, 2).Draw(t, "sigChoice")
                switch choice {
                case 0:
                        includeCloserNoClosee = true
                case 1:
                        includeNoCloserClosee = true
                case 2:
                        includeCloserAndClosee = true
                }
        }

        if includeCloserNoClosee {
                sig := RandSignature(t)
                msg.CloserNoClosee = tlv.SomeRecordT(
                        tlv.NewRecordT[tlv.TlvType1, Sig](sig),
                )
        }

        if includeNoCloserClosee {
                sig := RandSignature(t)
                msg.NoCloserClosee = tlv.SomeRecordT(
                        tlv.NewRecordT[tlv.TlvType2, Sig](sig),
                )
        }

        if includeCloserAndClosee {
                sig := RandSignature(t)
                msg.CloserAndClosee = tlv.SomeRecordT(
                        tlv.NewRecordT[tlv.TlvType3, Sig](sig),
                )
        }

        return msg
}

// A compile time check to ensure ClosingSigned implements the
// lnwire.TestMessage interface.
var _ TestMessage = (*ClosingSigned)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (c *ClosingSigned) RandTestMessage(t *rapid.T) Message {
        // Generate a random boolean to decide whether to include CommitSig or
        // PartialSig Since they're mutually exclusive, when one is populated,
        // the other must be blank.
        usePartialSig := rapid.Bool().Draw(t, "usePartialSig")

        msg := &ClosingSigned{
                ChannelID: RandChannelID(t),
                FeeSatoshis: btcutil.Amount(
                        rapid.Int64Range(0, 1000000).Draw(t, "feeSatoshis"),
                ),
                ExtraData: RandExtraOpaqueData(t, nil),
        }

        if usePartialSig {
                sigBytes := rapid.SliceOfN(rapid.Byte(), 32, 32).Draw(
                        t, "sigScalar",
                )
                var s btcec.ModNScalar
                _ = s.SetByteSlice(sigBytes)

                msg.PartialSig = SomePartialSig(NewPartialSig(s))
                msg.Signature = Sig{}
        } else {
                msg.Signature = RandSignature(t)
        }

        return msg
}

// A compile time check to ensure CommitSig implements the lnwire.TestMessage
// interface.
var _ TestMessage = (*CommitSig)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (c *CommitSig) RandTestMessage(t *rapid.T) Message {
        cr, _ := RandCustomRecords(t, nil, true)
        sig := &CommitSig{
                ChanID:        RandChannelID(t),
                CommitSig:     RandSignature(t),
                CustomRecords: cr,
        }

        numHtlcSigs := rapid.IntRange(0, 20).Draw(t, "numHtlcSigs")
        htlcSigs := make([]Sig, numHtlcSigs)
        for i := 0; i < numHtlcSigs; i++ {
                htlcSigs[i] = RandSignature(t)
        }

        if len(htlcSigs) > 0 {
                sig.HtlcSigs = htlcSigs
        }

        includePartialSig := rapid.Bool().Draw(t, "includePartialSig")
        if includePartialSig {
                sigWithNonce := RandPartialSigWithNonce(t)
                sig.PartialSig = MaybePartialSigWithNonce(sigWithNonce)
        }

        return sig
}

// A compile time check to ensure Custom implements the lnwire.TestMessage
// interface.
var _ TestMessage = (*Custom)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (c *Custom) RandTestMessage(t *rapid.T) Message {
        msgType := MessageType(
                rapid.IntRange(int(CustomTypeStart), 65535).Draw(
                        t, "customMsgType",
                ),
        )

        dataLen := rapid.IntRange(0, 1000).Draw(t, "customDataLength")
        data := rapid.SliceOfN(rapid.Byte(), dataLen, dataLen).Draw(
                t, "customData",
        )

        msg, err := NewCustom(msgType, data)
        if err != nil {
                panic(fmt.Sprintf("Error creating custom message: %v", err))
        }

        return msg
}

// A compile time check to ensure DynAck implements the lnwire.TestMessage
// interface.
var _ TestMessage = (*DynAck)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (da *DynAck) RandTestMessage(t *rapid.T) Message {
        msg := &DynAck{
                ChanID:    RandChannelID(t),
                ExtraData: RandExtraOpaqueData(t, nil),
        }

        includeLocalNonce := rapid.Bool().Draw(t, "includeLocalNonce")

        if includeLocalNonce {
                msg.LocalNonce = fn.Some(RandMusig2Nonce(t))
        }

        return msg
}

// A compile time check to ensure DynPropose implements the lnwire.TestMessage
// interface.
var _ TestMessage = (*DynPropose)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (dp *DynPropose) RandTestMessage(t *rapid.T) Message {
        msg := &DynPropose{
                ChanID:    RandChannelID(t),
                Initiator: rapid.Bool().Draw(t, "initiator"),
                ExtraData: RandExtraOpaqueData(t, nil),
        }

        // Randomly decide which optional fields to include
        includeDustLimit := rapid.Bool().Draw(t, "includeDustLimit")
        includeMaxValueInFlight := rapid.Bool().Draw(
                t, "includeMaxValueInFlight",
        )
        includeChannelReserve := rapid.Bool().Draw(t, "includeChannelReserve")
        includeCsvDelay := rapid.Bool().Draw(t, "includeCsvDelay")
        includeMaxAcceptedHTLCs := rapid.Bool().Draw(
                t, "includeMaxAcceptedHTLCs",
        )
        includeFundingKey := rapid.Bool().Draw(t, "includeFundingKey")
        includeChannelType := rapid.Bool().Draw(t, "includeChannelType")
        includeKickoffFeerate := rapid.Bool().Draw(t, "includeKickoffFeerate")

        // Generate random values for each included field
        if includeDustLimit {
                dl := btcutil.Amount(rapid.Uint32().Draw(t, "dustLimit"))
                msg.DustLimit = fn.Some(dl)
        }

        if includeMaxValueInFlight {
                mvif := MilliSatoshi(rapid.Uint64().Draw(t, "maxValueInFlight"))
                msg.MaxValueInFlight = fn.Some(mvif)
        }

        if includeChannelReserve {
                cr := btcutil.Amount(rapid.Uint32().Draw(t, "channelReserve"))
                msg.ChannelReserve = fn.Some(cr)
        }

        if includeCsvDelay {
                cd := rapid.Uint16().Draw(t, "csvDelay")
                msg.CsvDelay = fn.Some(cd)
        }

        if includeMaxAcceptedHTLCs {
                mah := rapid.Uint16().Draw(t, "maxAcceptedHTLCs")
                msg.MaxAcceptedHTLCs = fn.Some(mah)
        }

        if includeFundingKey {
                msg.FundingKey = fn.Some(*RandPubKey(t))
        }

        if includeChannelType {
                msg.ChannelType = fn.Some(*RandChannelType(t))
        }

        if includeKickoffFeerate {
                kf := chainfee.SatPerKWeight(rapid.Uint32().Draw(
                        t, "kickoffFeerate"),
                )
                msg.KickoffFeerate = fn.Some(kf)
        }

        return msg
}

// A compile time check to ensure DynReject implements the lnwire.TestMessage
// interface.
var _ TestMessage = (*DynReject)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (dr *DynReject) RandTestMessage(t *rapid.T) Message {
        featureVec := NewRawFeatureVector()

        numFeatures := rapid.IntRange(0, 8).Draw(t, "numRejections")
        for i := 0; i < numFeatures; i++ {
                bit := FeatureBit(
                        rapid.IntRange(0, 31).Draw(
                                t, fmt.Sprintf("rejectionBit-%d", i),
                        ),
                )
                featureVec.Set(bit)
        }

        var extraData ExtraOpaqueData
        randData := RandExtraOpaqueData(t, nil)
        if len(randData) > 0 {
                extraData = randData
        }

        return &DynReject{
                ChanID:           RandChannelID(t),
                UpdateRejections: *featureVec,
                ExtraData:        extraData,
        }
}

// A compile time check to ensure FundingCreated implements the TestMessage
// interface.
var _ TestMessage = (*FundingCreated)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (f *FundingCreated) RandTestMessage(t *rapid.T) Message {
        var pendingChanID [32]byte
        pendingChanIDBytes := rapid.SliceOfN(rapid.Byte(), 32, 32).Draw(
                t, "pendingChanID",
        )
        copy(pendingChanID[:], pendingChanIDBytes)

        includePartialSig := rapid.Bool().Draw(t, "includePartialSig")
        var partialSig OptPartialSigWithNonceTLV
        var commitSig Sig

        if includePartialSig {
                sigWithNonce := RandPartialSigWithNonce(t)
                partialSig = MaybePartialSigWithNonce(sigWithNonce)

                // When using partial sig, CommitSig should be empty/blank.
                commitSig = Sig{}
        } else {
                commitSig = RandSignature(t)
        }

        return &FundingCreated{
                PendingChannelID: pendingChanID,
                FundingPoint:     RandOutPoint(t),
                CommitSig:        commitSig,
                PartialSig:       partialSig,
                ExtraData:        RandExtraOpaqueData(t, nil),
        }
}

// A compile time check to ensure FundingSigned implements the
// lnwire.TestMessage interface.
var _ TestMessage = (*FundingSigned)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (f *FundingSigned) RandTestMessage(t *rapid.T) Message {
        usePartialSig := rapid.Bool().Draw(t, "usePartialSig")

        msg := &FundingSigned{
                ChanID:    RandChannelID(t),
                ExtraData: RandExtraOpaqueData(t, nil),
        }

        if usePartialSig {
                sigWithNonce := RandPartialSigWithNonce(t)
                msg.PartialSig = MaybePartialSigWithNonce(sigWithNonce)

                msg.CommitSig = Sig{}
        } else {
                msg.CommitSig = RandSignature(t)
        }

        return msg
}

// A compile time check to ensure GossipTimestampRange implements the
// lnwire.TestMessage interface.
var _ TestMessage = (*GossipTimestampRange)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (g *GossipTimestampRange) RandTestMessage(t *rapid.T) Message {
        var chainHash chainhash.Hash
        hashBytes := rapid.SliceOfN(rapid.Byte(), 32, 32).Draw(t, "chainHash")
        copy(chainHash[:], hashBytes)

        msg := &GossipTimestampRange{
                ChainHash:      chainHash,
                FirstTimestamp: rapid.Uint32().Draw(t, "firstTimestamp"),
                TimestampRange: rapid.Uint32().Draw(t, "timestampRange"),
                ExtraData:      RandExtraOpaqueData(t, nil),
        }

        includeFirstBlockHeight := rapid.Bool().Draw(
                t, "includeFirstBlockHeight",
        )
        includeBlockRange := rapid.Bool().Draw(t, "includeBlockRange")

        if includeFirstBlockHeight {
                height := rapid.Uint32().Draw(t, "firstBlockHeight")
                msg.FirstBlockHeight = tlv.SomeRecordT(
                        tlv.RecordT[tlv.TlvType2, uint32]{Val: height},
                )
        }

        if includeBlockRange {
                blockRange := rapid.Uint32().Draw(t, "blockRange")
                msg.BlockRange = tlv.SomeRecordT(
                        tlv.RecordT[tlv.TlvType4, uint32]{Val: blockRange},
                )
        }

        return msg
}

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (msg *Init) RandTestMessage(t *rapid.T) Message {
        global := NewRawFeatureVector()
        local := NewRawFeatureVector()

        numGlobalFeatures := rapid.IntRange(0, 20).Draw(t, "numGlobalFeatures")
        for i := 0; i < numGlobalFeatures; i++ {
                bit := FeatureBit(
                        rapid.IntRange(0, 100).Draw(
                                t, fmt.Sprintf("globalFeatureBit%d", i),
                        ),
                )
                global.Set(bit)
        }

        numLocalFeatures := rapid.IntRange(0, 20).Draw(t, "numLocalFeatures")
        for i := 0; i < numLocalFeatures; i++ {
                bit := FeatureBit(
                        rapid.IntRange(0, 100).Draw(
                                t, fmt.Sprintf("localFeatureBit%d", i),
                        ),
                )
                local.Set(bit)
        }

        return NewInitMessage(global, local)
}

// A compile time check to ensure KickoffSig implements the lnwire.TestMessage
// interface.
var _ TestMessage = (*KickoffSig)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (ks *KickoffSig) RandTestMessage(t *rapid.T) Message {
        return &KickoffSig{
                ChanID:    RandChannelID(t),
                Signature: RandSignature(t),
                ExtraData: RandExtraOpaqueData(t, nil),
        }
}

// A compile time check to ensure NodeAnnouncement implements the
// lnwire.TestMessage interface.
var _ TestMessage = (*NodeAnnouncement)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (a *NodeAnnouncement) RandTestMessage(t *rapid.T) Message {
        // Generate random compressed public key for node ID
        pubKey := RandPubKey(t)
        var nodeID [33]byte
        copy(nodeID[:], pubKey.SerializeCompressed())

        // Generate random RGB color
        rgbColor := color.RGBA{
                R: uint8(rapid.IntRange(0, 255).Draw(t, "rgbR")),
                G: uint8(rapid.IntRange(0, 255).Draw(t, "rgbG")),
                B: uint8(rapid.IntRange(0, 255).Draw(t, "rgbB")),
        }

        return &NodeAnnouncement{
                Signature: RandSignature(t),
                Features:  RandFeatureVector(t),
                Timestamp: uint32(rapid.IntRange(0, 0x7FFFFFFF).Draw(
                        t, "timestamp"),
                ),
                NodeID:          nodeID,
                RGBColor:        rgbColor,
                Alias:           RandNodeAlias(t),
                Addresses:       RandNetAddrs(t),
                ExtraOpaqueData: RandExtraOpaqueData(t, nil),
        }
}

// A compile time check to ensure OpenChannel implements the TestMessage
// interface.
var _ TestMessage = (*OpenChannel)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (o *OpenChannel) RandTestMessage(t *rapid.T) Message {
        chainHash := RandChainHash(t)
        var hash chainhash.Hash
        copy(hash[:], chainHash[:])

        var pendingChanID [32]byte
        pendingChanIDBytes := rapid.SliceOfN(rapid.Byte(), 32, 32).Draw(
                t, "pendingChanID",
        )
        copy(pendingChanID[:], pendingChanIDBytes)

        includeChannelType := rapid.Bool().Draw(t, "includeChannelType")
        includeLeaseExpiry := rapid.Bool().Draw(t, "includeLeaseExpiry")
        includeLocalNonce := rapid.Bool().Draw(t, "includeLocalNonce")

        var channelFlags FundingFlag
        if rapid.Bool().Draw(t, "announceChannel") {
                channelFlags |= FFAnnounceChannel
        }

        var localNonce OptMusig2NonceTLV
        if includeLocalNonce {
                nonce := RandMusig2Nonce(t)
                localNonce = tlv.SomeRecordT(
                        tlv.NewRecordT[NonceRecordTypeT, Musig2Nonce](nonce),
                )
        }

        var channelType *ChannelType
        if includeChannelType {
                channelType = RandChannelType(t)
        }

        var leaseExpiry *LeaseExpiry
        if includeLeaseExpiry {
                leaseExpiry = RandLeaseExpiry(t)
        }

        return &OpenChannel{
                ChainHash:        hash,
                PendingChannelID: pendingChanID,
                FundingAmount: btcutil.Amount(
                        rapid.IntRange(5000, 10000000).Draw(t, "fundingAmount"),
                ),
                PushAmount: MilliSatoshi(
                        rapid.IntRange(0, 1000000).Draw(t, "pushAmount"),
                ),
                DustLimit: btcutil.Amount(
                        rapid.IntRange(100, 1000).Draw(t, "dustLimit"),
                ),
                MaxValueInFlight: MilliSatoshi(
                        rapid.IntRange(10000, 1000000).Draw(
                                t, "maxValueInFlight",
                        ),
                ),
                ChannelReserve: btcutil.Amount(
                        rapid.IntRange(1000, 10000).Draw(t, "channelReserve"),
                ),
                HtlcMinimum: MilliSatoshi(
                        rapid.IntRange(1, 1000).Draw(t, "htlcMinimum"),
                ),
                FeePerKiloWeight: uint32(
                        rapid.IntRange(250, 10000).Draw(t, "feePerKw"),
                ),
                CsvDelay: uint16(
                        rapid.IntRange(144, 1000).Draw(t, "csvDelay"),
                ),
                MaxAcceptedHTLCs: uint16(
                        rapid.IntRange(10, 500).Draw(t, "maxAcceptedHTLCs"),
                ),
                FundingKey:            RandPubKey(t),
                RevocationPoint:       RandPubKey(t),
                PaymentPoint:          RandPubKey(t),
                DelayedPaymentPoint:   RandPubKey(t),
                HtlcPoint:             RandPubKey(t),
                FirstCommitmentPoint:  RandPubKey(t),
                ChannelFlags:          channelFlags,
                UpfrontShutdownScript: RandDeliveryAddress(t),
                ChannelType:           channelType,
                LeaseExpiry:           leaseExpiry,
                LocalNonce:            localNonce,
                ExtraData:             RandExtraOpaqueData(t, nil),
        }
}

// A compile time check to ensure Ping implements the lnwire.TestMessage
// interface.
var _ TestMessage = (*Ping)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (p *Ping) RandTestMessage(t *rapid.T) Message {
        numPongBytes := uint16(rapid.IntRange(0, int(MaxPongBytes)).Draw(
                t, "numPongBytes"),
        )

        // Generate padding bytes (but keeping within allowed message size)
        // MaxMsgBody - 2 (for NumPongBytes) - 2 (for padding length)
        maxPaddingLen := MaxMsgBody - 4
        paddingLen := rapid.IntRange(0, maxPaddingLen).Draw(
                t, "paddingLen",
        )
        padding := make(PingPayload, paddingLen)

        // Fill padding with random bytes
        for i := 0; i < paddingLen; i++ {
                padding[i] = byte(rapid.IntRange(0, 255).Draw(
                        t, fmt.Sprintf("paddingByte%d", i)),
                )
        }

        return &Ping{
                NumPongBytes: numPongBytes,
                PaddingBytes: padding,
        }
}

// A compile time check to ensure Pong implements the lnwire.TestMessage
// interface.
var _ TestMessage = (*Pong)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (p *Pong) RandTestMessage(t *rapid.T) Message {
        payloadLen := rapid.IntRange(0, 1000).Draw(t, "pongPayloadLength")
        payload := rapid.SliceOfN(rapid.Byte(), payloadLen, payloadLen).Draw(
                t, "pongPayload",
        )

        return &Pong{
                PongBytes: payload,
        }
}

// A compile time check to ensure QueryChannelRange implements the
// lnwire.TestMessage interface.
var _ TestMessage = (*QueryChannelRange)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (q *QueryChannelRange) RandTestMessage(t *rapid.T) Message {
        msg := &QueryChannelRange{
                FirstBlockHeight: uint32(rapid.IntRange(0, 1000000).Draw(
                        t, "firstBlockHeight"),
                ),
                NumBlocks: uint32(rapid.IntRange(1, 10000).Draw(
                        t, "numBlocks"),
                ),
                ExtraData: RandExtraOpaqueData(t, nil),
        }

        // Generate chain hash
        chainHash := RandChainHash(t)
        var chainHashObj chainhash.Hash
        copy(chainHashObj[:], chainHash[:])
        msg.ChainHash = chainHashObj

        // Randomly include QueryOptions
        if rapid.Bool().Draw(t, "includeQueryOptions") {
                queryOptions := &QueryOptions{}
                *queryOptions = QueryOptions(*RandFeatureVector(t))
                msg.QueryOptions = queryOptions
        }

        return msg
}

// A compile time check to ensure QueryShortChanIDs implements the
// lnwire.TestMessage interface.
var _ TestMessage = (*QueryShortChanIDs)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (q *QueryShortChanIDs) RandTestMessage(t *rapid.T) Message {
        var chainHash chainhash.Hash
        hashBytes := rapid.SliceOfN(rapid.Byte(), 32, 32).Draw(t, "chainHash")
        copy(chainHash[:], hashBytes)

        encodingType := EncodingSortedPlain
        if rapid.Bool().Draw(t, "useZlibEncoding") {
                encodingType = EncodingSortedZlib
        }

        msg := &QueryShortChanIDs{
                ChainHash:    chainHash,
                EncodingType: encodingType,
                ExtraData:    RandExtraOpaqueData(t, nil),
                noSort:       false,
        }

        numIDs := rapid.IntRange(2, 20).Draw(t, "numShortChanIDs")

        // Generate sorted short channel IDs.
        shortChanIDs := make([]ShortChannelID, numIDs)
        for i := 0; i < numIDs; i++ {
                shortChanIDs[i] = RandShortChannelID(t)

                // Ensure they're properly sorted.
                if i > 0 && shortChanIDs[i].ToUint64() <=
                        shortChanIDs[i-1].ToUint64() {

                        // Ensure this ID is larger than the previous one.
                        shortChanIDs[i] = NewShortChanIDFromInt(
                                shortChanIDs[i-1].ToUint64() + 1,
                        )
                }
        }

        msg.ShortChanIDs = shortChanIDs

        return msg
}

// A compile time check to ensure ReplyChannelRange implements the
// lnwire.TestMessage interface.
var _ TestMessage = (*ReplyChannelRange)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (c *ReplyChannelRange) RandTestMessage(t *rapid.T) Message {
        msg := &ReplyChannelRange{
                FirstBlockHeight: uint32(rapid.IntRange(0, 1000000).Draw(
                        t, "firstBlockHeight"),
                ),
                NumBlocks: uint32(rapid.IntRange(1, 10000).Draw(
                        t, "numBlocks"),
                ),
                Complete: uint8(rapid.IntRange(0, 1).Draw(t, "complete")),
                EncodingType: QueryEncoding(
                        rapid.IntRange(0, 1).Draw(t, "encodingType"),
                ),
                ExtraData: RandExtraOpaqueData(t, nil),
        }

        msg.ChainHash = RandChainHash(t)

        numShortChanIDs := rapid.IntRange(0, 20).Draw(t, "numShortChanIDs")
        if numShortChanIDs == 0 {
                return msg
        }

        scidSet := fn.NewSet[ShortChannelID]()
        scids := make([]ShortChannelID, numShortChanIDs)
        for i := 0; i < numShortChanIDs; i++ {
                scid := RandShortChannelID(t)
                for scidSet.Contains(scid) {
                        scid = RandShortChannelID(t)
                }

                scids[i] = scid

                scidSet.Add(scid)
        }

        // Make sure there're no duplicates.
        msg.ShortChanIDs = scids

        if rapid.Bool().Draw(t, "includeTimestamps") && numShortChanIDs > 0 {
                msg.Timestamps = make(Timestamps, numShortChanIDs)
                for i := 0; i < numShortChanIDs; i++ {
                        msg.Timestamps[i] = ChanUpdateTimestamps{
                                Timestamp1: uint32(rapid.IntRange(0, math.MaxInt32).Draw(t, fmt.Sprintf("timestamp-1-%d", i))), //nolint:ll
                                Timestamp2: uint32(rapid.IntRange(0, math.MaxInt32).Draw(t, fmt.Sprintf("timestamp-2-%d", i))), //nolint:ll
                        }
                }
        }

        return msg
}

// A compile time check to ensure ReplyShortChanIDsEnd implements the
// lnwire.TestMessage interface.
var _ TestMessage = (*ReplyShortChanIDsEnd)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (c *ReplyShortChanIDsEnd) RandTestMessage(t *rapid.T) Message {
        var chainHash chainhash.Hash
        hashBytes := rapid.SliceOfN(rapid.Byte(), 32, 32).Draw(t, "chainHash")
        copy(chainHash[:], hashBytes)

        complete := uint8(rapid.IntRange(0, 1).Draw(t, "complete"))

        return &ReplyShortChanIDsEnd{
                ChainHash: chainHash,
                Complete:  complete,
                ExtraData: RandExtraOpaqueData(t, nil),
        }
}

// RandTestMessage returns a RevokeAndAck message populated with random data.
//
// This is part of the TestMessage interface.
func (c *RevokeAndAck) RandTestMessage(t *rapid.T) Message {
        msg := NewRevokeAndAck()

        var chanID ChannelID
        bytes := rapid.SliceOfN(rapid.Byte(), 32, 32).Draw(t, "channelID")
        copy(chanID[:], bytes)
        msg.ChanID = chanID

        revBytes := rapid.SliceOfN(rapid.Byte(), 32, 32).Draw(t, "revocation")
        copy(msg.Revocation[:], revBytes)

        msg.NextRevocationKey = RandPubKey(t)

        if rapid.Bool().Draw(t, "includeLocalNonce") {
                var nonce Musig2Nonce
                nonceBytes := rapid.SliceOfN(rapid.Byte(), 32, 32).Draw(
                        t, "nonce",
                )
                copy(nonce[:], nonceBytes)

                msg.LocalNonce = tlv.SomeRecordT(
                        tlv.NewRecordT[NonceRecordTypeT, Musig2Nonce](nonce),
                )
        }

        return msg
}

// A compile-time check to ensure Shutdown implements the lnwire.TestMessage
// interface.
var _ TestMessage = (*Shutdown)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (s *Shutdown) RandTestMessage(t *rapid.T) Message {
        // Generate random delivery address
        // First decide the address type (P2PKH, P2SH, P2WPKH, P2WSH, P2TR)
        addrType := rapid.IntRange(0, 4).Draw(t, "addrType")

        // Generate random address length based on type
        var addrLen int
        switch addrType {
        // P2PKH
        case 0:
                addrLen = 25
        // P2SH
        case 1:
                addrLen = 23
        // P2WPKH
        case 2:
                addrLen = 22
        // P2WSH
        case 3:
                addrLen = 34
        // P2TR
        case 4:
                addrLen = 34
        }

        addr := rapid.SliceOfN(rapid.Byte(), addrLen, addrLen).Draw(
                t, "address",
        )

        // Randomly decide whether to include a shutdown nonce
        includeNonce := rapid.Bool().Draw(t, "includeNonce")
        var shutdownNonce ShutdownNonceTLV

        if includeNonce {
                shutdownNonce = SomeShutdownNonce(RandMusig2Nonce(t))
        }

        cr, _ := RandCustomRecords(t, nil, true)

        return &Shutdown{
                ChannelID:     RandChannelID(t),
                Address:       addr,
                ShutdownNonce: shutdownNonce,
                CustomRecords: cr,
        }
}

// A compile time check to ensure Stfu implements the lnwire.TestMessage
// interface.
var _ TestMessage = (*Stfu)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (s *Stfu) RandTestMessage(t *rapid.T) Message {
        m := &Stfu{
                ChanID:    RandChannelID(t),
                Initiator: rapid.Bool().Draw(t, "initiator"),
        }

        extraData := RandExtraOpaqueData(t, nil)
        if len(extraData) > 0 {
                m.ExtraData = extraData
        }

        return m
}

// A compile time check to ensure UpdateAddHTLC implements the
// lnwire.TestMessage interface.
var _ TestMessage = (*UpdateAddHTLC)(nil)

// RandTestMessage returns an UpdateAddHTLC message populated with random data.
//
// This is part of the TestMessage interface.
func (c *UpdateAddHTLC) RandTestMessage(t *rapid.T) Message {
        msg := &UpdateAddHTLC{
                ChanID: RandChannelID(t),
                ID:     rapid.Uint64().Draw(t, "id"),
                Amount: MilliSatoshi(rapid.Uint64().Draw(t, "amount")),
                Expiry: rapid.Uint32().Draw(t, "expiry"),
        }

        hashBytes := rapid.SliceOfN(rapid.Byte(), 32, 32).Draw(t, "paymentHash")
        copy(msg.PaymentHash[:], hashBytes)

        onionBytes := rapid.SliceOfN(
                rapid.Byte(), OnionPacketSize, OnionPacketSize,
        ).Draw(t, "onionBlob")
        copy(msg.OnionBlob[:], onionBytes)

        numRecords := rapid.IntRange(0, 5).Draw(t, "numRecords")
        if numRecords > 0 {
                msg.CustomRecords, _ = RandCustomRecords(t, nil, true)
        }

        // 50/50 chance to add a blinding point
        if rapid.Bool().Draw(t, "includeBlindingPoint") {
                pubKey := RandPubKey(t)

                msg.BlindingPoint = tlv.SomeRecordT(
                        tlv.NewPrimitiveRecord[BlindingPointTlvType](pubKey),
                )
        }

        return msg
}

// A compile time check to ensure UpdateFailHTLC implements the TestMessage
// interface.
var _ TestMessage = (*UpdateFailHTLC)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (c *UpdateFailHTLC) RandTestMessage(t *rapid.T) Message {
        return &UpdateFailHTLC{
                ChanID:    RandChannelID(t),
                ID:        rapid.Uint64().Draw(t, "id"),
                Reason:    RandOpaqueReason(t),
                ExtraData: RandExtraOpaqueData(t, nil),
        }
}

// A compile time check to ensure UpdateFailMalformedHTLC implements the
// TestMessage interface.
var _ TestMessage = (*UpdateFailMalformedHTLC)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (c *UpdateFailMalformedHTLC) RandTestMessage(t *rapid.T) Message {
        return &UpdateFailMalformedHTLC{
                ChanID:       RandChannelID(t),
                ID:           rapid.Uint64().Draw(t, "id"),
                ShaOnionBlob: RandSHA256Hash(t),
                FailureCode:  RandFailCode(t),
                ExtraData:    RandExtraOpaqueData(t, nil),
        }
}

// A compile time check to ensure UpdateFee implements the TestMessage
// interface.
var _ TestMessage = (*UpdateFee)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (c *UpdateFee) RandTestMessage(t *rapid.T) Message {
        return &UpdateFee{
                ChanID:    RandChannelID(t),
                FeePerKw:  uint32(rapid.IntRange(1, 10000).Draw(t, "feePerKw")),
                ExtraData: RandExtraOpaqueData(t, nil),
        }
}

// A compile time check to ensure UpdateFulfillHTLC implements the TestMessage
// interface.
var _ TestMessage = (*UpdateFulfillHTLC)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (c *UpdateFulfillHTLC) RandTestMessage(t *rapid.T) Message {
        msg := &UpdateFulfillHTLC{
                ChanID:          RandChannelID(t),
                ID:              rapid.Uint64().Draw(t, "id"),
                PaymentPreimage: RandPaymentPreimage(t),
        }

        cr, ignoreRecords := RandCustomRecords(t, nil, true)
        msg.CustomRecords = cr

        randData := RandExtraOpaqueData(t, ignoreRecords)
        if len(randData) > 0 {
                msg.ExtraData = randData
        }

        return msg
}

// A compile time check to ensure Warning implements the lnwire.TestMessage
// interface.
var _ TestMessage = (*Warning)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (c *Warning) RandTestMessage(t *rapid.T) Message {
        msg := &Warning{
                ChanID: RandChannelID(t),
        }

        useASCII := rapid.Bool().Draw(t, "useASCII")
        if useASCII {
                length := rapid.IntRange(1, 100).Draw(t, "warningDataLength")
                data := make([]byte, length)
                for i := 0; i < length; i++ {
                        data[i] = byte(
                                rapid.IntRange(32, 126).Draw(
                                        t, fmt.Sprintf("warningDataByte-%d", i),
                                ),
                        )
                }
                msg.Data = data
        } else {
                length := rapid.IntRange(1, 100).Draw(t, "warningDataLength")
                msg.Data = rapid.SliceOfN(rapid.Byte(), length, length).Draw(
                        t, "warningData",
                )
        }

        return msg
}

// A compile time check to ensure Error implements the lnwire.TestMessage
// interface.
var _ TestMessage = (*Error)(nil)

// RandTestMessage populates the message with random data suitable for testing.
// It uses the rapid testing framework to generate random values.
//
// This is part of the TestMessage interface.
func (c *Error) RandTestMessage(t *rapid.T) Message {
        msg := &Error{
                ChanID: RandChannelID(t),
        }

        useASCII := rapid.Bool().Draw(t, "useASCII")
        if useASCII {
                length := rapid.IntRange(1, 100).Draw(t, "errorDataLength")
                data := make([]byte, length)
                for i := 0; i < length; i++ {
                        data[i] = byte(
                                rapid.IntRange(32, 126).Draw(
                                        t, fmt.Sprintf("errorDataByte-%d", i),
                                ),
                        )
                }
                msg.Data = data
        } else {
                // Generate random binary data
                length := rapid.IntRange(1, 100).Draw(t, "errorDataLength")
                msg.Data = rapid.SliceOfN(
                        rapid.Byte(), length, length,
                ).Draw(t, "errorData")
        }

        return msg
}

lightningnetwork / lnd / 15736109134

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