zapChainLink function

String zapChainLink({
  1. required Map<String, Object?> fact,
  2. required String prevLink,
})

One chain link: sha256 over the payload.

Implementation

String zapChainLink({
  required Map<String, Object?> fact,
  required String prevLink,
}) => sha256.convert(utf8.encode(zapChainPayload(fact, prevLink))).toString();