New Project

blockly.xml

<xml xmlns="https://developers.google.com/blockly/xml"><block type="BaseContractType" id="root_contract" deletable="false" x="13" y="187"><statement name="BaseContractType"><block type="CloseContractType" id="4O,C,:P.twf:e#oW:Wl}"/></statement></block></xml>

playground.js

    const lovelacePerAda : SomeNumber = 1000000n;
    const amountOfAda : SomeNumber = 1000n;
    const amountOfLovelace : SomeNumber = lovelacePerAda * amountOfAda;
    const amountOfDollars : SomeNumber = 100n;
    const dollars : Token = Token("85bb65", "dollar")

    type SwapParty = {
    party: Party;
    currency: Token;
    amount: SomeNumber;
    };

    const alice : SwapParty = {
    party: Role("alice"),
    currency: ada,
    amount: amountOfLovelace
    }

    const bob : SwapParty = {
    party: Role("bob"),
    currency: dollars,
    amount: amountOfDollars
    }

    const makeDeposit = function(src : SwapParty, timeout : SomeNumber,
                                continuation : Contract) : Contract
    {
    return When([Case(Deposit(src.party, src.party, src.currency, src.amount),
                        continuation)],
                timeout,
                Close);
    }

    const makePayment = function(src : SwapParty, dest : SwapParty,
                                continuation : Contract) : Contract
    {
    return Pay(src.party, Party(dest.party), src.currency, src.amount,
                continuation);
    }

    const contract : Contract = makeDeposit(alice, 10n,
                               makeDeposit(bob, 20n,
                                   makePayment(alice, bob,
                                       makePayment(bob, alice,
                                           Close))));

    return contract;

playground.marlowe

Close 

playground.marlowe.json

{}