NewBBoltDAG creates a etcd/bbolt backed DAG using the given database file path.

NewDocument creates a new unsigned document.

BFSWalker walks the DAG using the Breadth-First-Search (BFS) as described by Anany Levitin in "The Design & Analysis of Algorithms".

DAG is a directed acyclic graph consisting of nodes (documents) referring to preceding nodes.

Document defines a signed distributed document as described by RFC004 - Distributed Document Format.

UnsignedDocument holds the base properties of a document which can be signed to create a Document.

PayloadHash is a Hash of the payload of a Document.

Version defines a type for distributed document format version.

Visitor defines the contract for a function that visits the DAG.