Blockchain By Example

Initial LC model

As presented earlier in the LC concepts and design section, we have four actors in our LC use case, namely, a buyer, a seller, an issuing bank, and a confirming bank. Let's define these participants in our CTO model as follows:

namespace org.example.lcenum ParticipantType {  o BUYER  o SELLER  o ISSUING_BANK  o CONFIRMING_BANK}// PARTICIPANTS//BANKparticipant Bank identified by bankID {  o String bankID  o String name  o ParticipantType type}//USERparticipant User identified by userId {  o String userId  o String name  o String lastName optional  o String companyName

  o ParticipantType type  --> Bank bank}

We first define four types of participants—a buyer, seller, issuing bank, and confirming bank—in an enumeration, which is declared ...