ZeroCoupon

metadata.json

{"valueParameterInfo":[["Interest",{"valueParameterFormat":{"contents":[6,"₳"],"tag":"DecimalFormat"},"valueParameterDescription":"The interest paid by the _**borrower**_."}],["Amount",{"valueParameterFormat":{"contents":[6,"₳"],"tag":"DecimalFormat"},"valueParameterDescription":"The amount borrowed by the _**borrower**_."}]],"slotParameterDescriptions":[["Loan deadline","The _**lender**_ needs to deposit the _amount_ by this time."],["Payback deadline","The _**borrower**_ needs to deposit the repayment (_amount_ plus _interest_) by this time."]],"roleDescriptions":[["Borrower","The party that borrows the _amount_."],["Lender","The party that lends the _amount_."]],"contractType":"ZeroCouponBond","contractShortDescription":"A simple loan: the _**borrower**_ borrows the _amount_ from the _**lender**_, and at the _payback deadline_ pays back the _amount_ plus _interest_.","contractName":"Loan","contractLongDescription":"This is a high risk/high reward contract. There is no guarantee that the _**borrower**_ will pay back the loan. However there is an opportunity for the _**lender**_ to set a high _interest_ rate at the cost of taking on this risk.","choiceInfo":[]}

playground.js

    const discountedPrice: Value = ConstantParam("Amount");
    const notionalPrice: Value = AddValue(ConstantParam("Interest"), discountedPrice);

    const investor: Party = Role("Lender");
    const issuer: Party = Role("Borrower");

    const initialExchange: Timeout = SlotParam("Loan deadline");
    const maturityExchangeTimeout: Timeout = SlotParam("Payback deadline");

    function transfer(timeout: Timeout, from: Party, to: Party, amount: Value, continuation: Contract): Contract {
        return When([Case(Deposit(from, from, ada, amount),
            Pay(from, Party(to), ada, amount, continuation))],
            timeout,
            Close);
    }

    const contract: Contract =
        transfer(initialExchange, investor, issuer, discountedPrice,
            transfer(maturityExchangeTimeout, issuer, investor, notionalPrice,
                Close))

    return contract;

playground.marlowe.json

{}