chunk

type Store interface {
	// HasChunk checks if a chunk exists.
	// Returns error for I/O or connection failures.
	HasChunk(ctx context.Context, hash string) (bool, error)

	// GetChunk retrieves a chunk by hash.
	// NOTE: The caller must close the returned io.ReadCloser!
	GetChunk(ctx context.Context, hash string) (io.ReadCloser, error)

	// PutChunk stores a chunk. Returns true if chunk was new, and the compressed size.
	PutChunk(ctx context.Context, hash string, data []byte) (bool, int64, error)

	// DeleteChunk removes a chunk.
	DeleteChunk(ctx context.Context, hash string) error

	// WalkChunks walks all chunks in the store and calls fn for each hash.
	WalkChunks(ctx context.Context, fn func(hash string) error) error
}