blockstore

type Blockstore interface {
	DeleteBlock(context.Context, cid.Cid) error
	Has(context.Context, cid.Cid) (bool, error)
	Get(context.Context, cid.Cid) (blocks.Block, error)

	// GetSize returns the CIDs mapped BlockSize
	GetSize(context.Context, cid.Cid) (int, error)

	// Put puts a given block to the underlying datastore
	Put(context.Context, blocks.Block) error

	// PutMany puts a slice of blocks at the same time using batching
	// capabilities of the underlying datastore whenever possible.
	PutMany(context.Context, []blocks.Block) error

	// AllKeysChan returns a channel from which
	// the CIDs in the Blockstore can be read. It should respect
	// the given context, closing the channel if it becomes Done.
	AllKeysChan(ctx context.Context) (<-chan cid.Cid, error)

	// HashOnRead specifies if every read block should be
	// rehashed to make sure it matches its CID.
	HashOnRead(enabled bool)
}

type CacheOpts struct {
	HasBloomFilterSize   int // 1 byte
	HasBloomFilterHashes int // No size, 7 is usually best, consult bloom papers
	HasARCCacheSize      int // 32 bytes
}

type GCBlockstore interface {
	Blockstore
	GCLocker
}

type GCLocker interface {
	// GCLock locks the blockstore for garbage collection. No operations
	// that expect to finish with a pin should ocurr simultaneously.
	// Reading during GC is safe, and requires no lock.
	GCLock(context.Context) Unlocker

	// PinLock locks the blockstore for sequences of puts expected to finish
	// with a pin (before GC). Multiple put->pin sequences can write through
	// at the same time, but no GC should happen simulatenously.
	// Reading during Pinning is safe, and requires no lock.
	PinLock(context.Context) Unlocker

	// GcRequested returns true if GCLock has been called and is waiting to
	// take the lock
	GCRequested(context.Context) bool
}

type Option struct {
	// contains filtered or unexported fields
}

type Unlocker interface {
	Unlock(context.Context)
}

type Viewer interface {
	View(ctx context.Context, cid cid.Cid, callback func([]byte) error) error
}