Menggunakan Reader

transaksiBambangReader.ts

const accRepo: AccountRepo = {
  find: no => ({ name: 'Bambang', email: 'tampan@tampan.com' })
};

declare function debit(no: string, amount: number): Reader<AccountRepo, Account>;
declare function credit(no: string, amount: number): Reader<AccountRepo, Account>;
declare function balance(no: string): Reader<AccountRepo, number>;
  
const transaksiBambangF = (no: string) => composeK(
  () => balance(no),
  () => credit(no, 80),
  () => debit(no, 50),
  () => debit(no, 100)
);
const finalbalanceF = transaksiBambangF('NL90DLBK0286293543')(accRepo);

// atau kalo mau pake ala OOP
const transaksiBambang = (no: string) => debit(no, 100)
  .bind(() => debit(no, 50))
  .bind(() => credit(no, 80))
  .bind(() => balance(no))
const finalBalance = transaksiBambang('NL90DLBK0286293543').run(accRepo);