resolver

type ErrNoLink struct {
	Name string
	Node cid.Cid
}

type Resolver interface {
	// ResolveToLastNode walks the given path and returns the cid of the
	// last block referenced by the path, and the path segments to
	// traverse from the final block boundary to the final node within the
	// block.
	ResolveToLastNode(ctx context.Context, fpath path.Path) (cid.Cid, []string, error)
	// ResolvePath fetches the node for given path. It returns the last
	// item returned by ResolvePathComponents and the last link traversed
	// which can be used to recover the block.
	ResolvePath(ctx context.Context, fpath path.Path) (ipld.Node, ipld.Link, error)
	// ResolvePathComponents fetches the nodes for each segment of the given path.
	// It uses the first path component as a hash (key) of the first node, then
	// resolves all other components walking the links via a selector traversal
	ResolvePathComponents(ctx context.Context, fpath path.Path) ([]ipld.Node, error)
}