lnd/record/hop.go

package record

import (
	"github.com/lightningnetwork/lnd/tlv"
)

// NewAmtToFwdRecord creates a tlv.Record that encodes the amount_to_forward
// (type 2) for an onion payload.
func NewAmtToFwdRecord(amt *uint64) tlv.Record {
	return tlv.MakeDynamicRecord(
		tlv.AmtOnionType, amt, func() uint64 {
			return tlv.SizeTUint64(*amt)
		},
		tlv.ETUint64, tlv.DTUint64,
	)
}

// NewLockTimeRecord creates a tlv.Record that encodes the outgoing_cltv_value
// (type 4) for an onion payload.
func NewLockTimeRecord(lockTime *uint32) tlv.Record {
	return tlv.MakeDynamicRecord(
		tlv.LockTimeOnionType, lockTime, func() uint64 {
			return tlv.SizeTUint32(*lockTime)
		},
		tlv.ETUint32, tlv.DTUint32,
	)
}

// NewNextHopIDRecord creates a tlv.Record that encodes the short_channel_id
// (type 6) for an onion payload.
func NewNextHopIDRecord(cid *uint64) tlv.Record {
	return tlv.MakePrimitiveRecord(tlv.NextHopOnionType, cid)
}