48 lines
1.3 KiB
Go
48 lines
1.3 KiB
Go
package record
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import (
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"github.com/lightningnetwork/lnd/tlv"
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)
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const (
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// AmtOnionType is the type used in the onion to refrence the amount to
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// send to the next hop.
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AmtOnionType tlv.Type = 2
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// LockTimeTLV is the type used in the onion to refenernce the CLTV
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// value that should be used for the next hop's HTLC.
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LockTimeOnionType tlv.Type = 4
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// NextHopOnionType is the type used in the onion to reference the ID
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// of the next hop.
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NextHopOnionType tlv.Type = 6
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)
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// NewAmtToFwdRecord creates a tlv.Record that encodes the amount_to_forward
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// (type 2) for an onion payload.
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func NewAmtToFwdRecord(amt *uint64) tlv.Record {
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return tlv.MakeDynamicRecord(
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AmtOnionType, amt, func() uint64 {
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return tlv.SizeTUint64(*amt)
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},
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tlv.ETUint64, tlv.DTUint64,
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)
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}
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// NewLockTimeRecord creates a tlv.Record that encodes the outgoing_cltv_value
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// (type 4) for an onion payload.
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func NewLockTimeRecord(lockTime *uint32) tlv.Record {
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return tlv.MakeDynamicRecord(
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LockTimeOnionType, lockTime, func() uint64 {
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return tlv.SizeTUint32(*lockTime)
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},
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tlv.ETUint32, tlv.DTUint32,
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)
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}
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// NewNextHopIDRecord creates a tlv.Record that encodes the short_channel_id
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// (type 6) for an onion payload.
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func NewNextHopIDRecord(cid *uint64) tlv.Record {
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return tlv.MakePrimitiveRecord(NextHopOnionType, cid)
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}
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