MakeAddress creates a cipher.Address.

MakePubKey creates a cipher.PubKey.

PrepareDB creates and opens a temporary test DB and returns it with a cleanup callback.

RandBytes returns n random bytes.

RandSHA256 returns a random SHA256 hash.

RandSig returns a random cipher.Sig.

RequireError requires that an error is not nil and that its message matches.

RequireFileExists requires that a file exists.

RequireFileNotExists requires that a file doesn't exist.

SHA256FromHex converts an SHA256 hex string to a cipher.SHA256.