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aliasmgr: export alias start and end ranges

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Because we restrict custom SCID aliases to be in a specific range, we
export the range start and end values so a user of the RPCs we're going
to add in the next commits can adjust their values to fit within the
range.
This commit is contained in:
Oliver Gugger 2024-08-09 16:05:04 +02:00
parent 466f550ddb
commit 604bd81100
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GPG Key ID: 8E4256593F177720
2 changed files with 14 additions and 11 deletions
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23
aliasmgr/aliasmgr.go
View File

@ -58,17 +58,18 @@ var (
// operations. // operations.
byteOrder = binary.BigEndian byteOrder = binary.BigEndian
// startBlockHeight is the starting block height of the alias range. // AliasStartBlockHeight is the starting block height of the alias
startingBlockHeight uint32 = 16_000_000 // range.
AliasStartBlockHeight uint32 = 16_000_000
// endBlockHeight is the ending block height of the alias range. // AliasEndBlockHeight is the ending block height of the alias range.
endBlockHeight uint32 = 16_250_000 AliasEndBlockHeight uint32 = 16_250_000
// StartingAlias is the first alias ShortChannelID that will get // StartingAlias is the first alias ShortChannelID that will get
// assigned by RequestAlias. The starting BlockHeight is chosen so that // assigned by RequestAlias. The starting BlockHeight is chosen so that
// legitimate SCIDs in integration tests aren't mistaken for an alias. // legitimate SCIDs in integration tests aren't mistaken for an alias.
StartingAlias = lnwire.ShortChannelID{ StartingAlias = lnwire.ShortChannelID{
BlockHeight: startingBlockHeight, BlockHeight: AliasStartBlockHeight,
TxIndex: 0, TxIndex: 0,
TxPosition: 0, TxPosition: 0,
} }
@ -547,7 +548,9 @@ func (m *Manager) RequestAlias() (lnwire.ShortChannelID, error) {
nextAlias = getNextScid(nextAlias) nextAlias = getNextScid(nextAlias)
// Abort if we've reached the end of the range. // Abort if we've reached the end of the range.
if nextAlias.BlockHeight >= endBlockHeight { if nextAlias.BlockHeight >=
AliasEndBlockHeight {
return fmt.Errorf("range for custom " + return fmt.Errorf("range for custom " +
"aliases exhausted") "aliases exhausted")
} }
@ -581,7 +584,7 @@ func (m *Manager) RequestAlias() (lnwire.ShortChannelID, error) {
nextAlias = getNextScid(nextAlias) nextAlias = getNextScid(nextAlias)
// Abort if we've reached the end of the range. // Abort if we've reached the end of the range.
if nextAlias.BlockHeight >= endBlockHeight { if nextAlias.BlockHeight >= AliasEndBlockHeight {
return fmt.Errorf("range for custom " + return fmt.Errorf("range for custom " +
"aliases exhausted") "aliases exhausted")
} }
@ -665,10 +668,10 @@ func getNextScid(last lnwire.ShortChannelID) lnwire.ShortChannelID {
// IsAlias returns true if the passed SCID is an alias. The function determines // IsAlias returns true if the passed SCID is an alias. The function determines
// this by looking at the BlockHeight. If the BlockHeight is greater than // this by looking at the BlockHeight. If the BlockHeight is greater than
// startingBlockHeight and less than endBlockHeight, then it is an alias // AliasStartBlockHeight and less than AliasEndBlockHeight, then it is an alias
// assigned by RequestAlias. These bounds only apply to aliases we generate. // assigned by RequestAlias. These bounds only apply to aliases we generate.
// Our peers are free to use any range they choose. // Our peers are free to use any range they choose.
func IsAlias(scid lnwire.ShortChannelID) bool { func IsAlias(scid lnwire.ShortChannelID) bool {
return scid.BlockHeight >= startingBlockHeight && return scid.BlockHeight >= AliasStartBlockHeight &&
scid.BlockHeight < endBlockHeight scid.BlockHeight < AliasEndBlockHeight
} }

2
aliasmgr/aliasmgr_test.go
View File

@ -200,7 +200,7 @@ func TestGetNextScid(t *testing.T) {
name: "starting alias", name: "starting alias",
current: StartingAlias, current: StartingAlias,
expected: lnwire.ShortChannelID{ expected: lnwire.ShortChannelID{
BlockHeight: startingBlockHeight, BlockHeight: AliasStartBlockHeight,
TxIndex: 0, TxIndex: 0,
TxPosition: 1, TxPosition: 1,
}, },