package channeldb import ( "time" "github.com/lightningnetwork/lnd/channeldb/kvdb" "github.com/lightningnetwork/lnd/clock" ) const ( // DefaultRejectCacheSize is the default number of rejectCacheEntries to // cache for use in the rejection cache of incoming gossip traffic. This // produces a cache size of around 1MB. DefaultRejectCacheSize = 50000 // DefaultChannelCacheSize is the default number of ChannelEdges cached // in order to reply to gossip queries. This produces a cache size of // around 40MB. DefaultChannelCacheSize = 20000 ) // Options holds parameters for tuning and customizing a channeldb.DB. type Options struct { kvdb.BoltBackendConfig // RejectCacheSize is the maximum number of rejectCacheEntries to hold // in the rejection cache. RejectCacheSize int // ChannelCacheSize is the maximum number of ChannelEdges to hold in the // channel cache. ChannelCacheSize int // clock is the time source used by the database. clock clock.Clock // dryRun will fail to commit a successful migration when opening the // database if set to true. dryRun bool } // DefaultOptions returns an Options populated with default values. func DefaultOptions() Options { return Options{ BoltBackendConfig: kvdb.BoltBackendConfig{ NoFreelistSync: true, AutoCompact: false, AutoCompactMinAge: kvdb.DefaultBoltAutoCompactMinAge, }, RejectCacheSize: DefaultRejectCacheSize, ChannelCacheSize: DefaultChannelCacheSize, clock: clock.NewDefaultClock(), } } // OptionModifier is a function signature for modifying the default Options. type OptionModifier func(*Options) // OptionSetRejectCacheSize sets the RejectCacheSize to n. func OptionSetRejectCacheSize(n int) OptionModifier { return func(o *Options) { o.RejectCacheSize = n } } // OptionSetChannelCacheSize sets the ChannelCacheSize to n. func OptionSetChannelCacheSize(n int) OptionModifier { return func(o *Options) { o.ChannelCacheSize = n } } // OptionSetSyncFreelist allows the database to sync its freelist. func OptionSetSyncFreelist(b bool) OptionModifier { return func(o *Options) { o.NoFreelistSync = !b } } // OptionAutoCompact turns on automatic database compaction on startup. func OptionAutoCompact() OptionModifier { return func(o *Options) { o.AutoCompact = true } } // OptionAutoCompactMinAge sets the minimum age for automatic database // compaction. func OptionAutoCompactMinAge(minAge time.Duration) OptionModifier { return func(o *Options) { o.AutoCompactMinAge = minAge } } // OptionClock sets a non-default clock dependency. func OptionClock(clock clock.Clock) OptionModifier { return func(o *Options) { o.clock = clock } } // OptionDryRunMigration controls whether or not to intentially fail to commit a // successful migration that occurs when opening the database. func OptionDryRunMigration(dryRun bool) OptionModifier { return func(o *Options) { o.dryRun = dryRun } }