hash property
Sha2 sha256 Hash of the current signature block
sha256(previous hash + current recipient
public key)
Genesis hash is sha256(mint public key + the UUID of the promissory + issuance timestamp + amount + decimals + currency code)
Implementation
List<int> get hash => const fb.ListReader<int>(const fb.Uint8Reader())
.vTableGet(_bc, _bcOffset, 6, List.empty());