BlockHash typedef Null safety

BlockHash = void Function(Pointer<Uint8> hash, Pointer<Uint8> preamble, Pointer<Uint8> account, Pointer<Uint8> previous, Pointer<Uint8> rep, Pointer<Uint8> balance, Pointer<Uint8> link)

Implementation

typedef BlockHash = void Function(
  Pointer<Uint8> hash,
  Pointer<Uint8> preamble,
  Pointer<Uint8> account,
  Pointer<Uint8> previous,
  Pointer<Uint8> rep,
  Pointer<Uint8> balance,
  Pointer<Uint8> link
);