Package chaintypes is a fork of some components of github.com/ipfs/go-graphsync/testutil/chaintypes in order to avoid networking dependencies imposed by Graphsync.

MakeDagWithIdentity makes a non-unixfs DAG, wrapped in the go-unixfsnode/testutil/DirEntry struct (so it can be used in all the places DirEntry is) that has an identity CID in the middle linking a section that the identity CID must be traversed through to find.

RandomBytes returns a byte array of the given size with random values.

SetupBlockChain creates a new test block chain with the given height.

TODO: remove when this is fixed in IPLD prime.

TestBlockChain is a simulated data structure similar to a blockchain.