pirate-tree.md

Pirate-tree

Team Members

• Giuseppe Maniscalco, [email protected], https://github.com/giuseppemaniscalco
• James O'Shea, [email protected], https://github.com/jamesoshea
• Bojan Smudja, [email protected]
• Anita Popvic, [email protected]
• Vladimir Jankovic, [email protected]

Repositories

• https://github.com/giuseppemaniscalco/piratetree

What we wanted to do:

• Make a booking (we ended up picking hotels as there was inventory ready to go)
• Get a price for it and create a smart contract which whould hold ETH in escrow until the value of the booking is fully paid for
• Allow guest to partially pay for the booking
• Release these funds to the hotel once the full amount has been paid
• Nice to have: notify hotels/guests once this is done

What we actually managed:

• Get the WT booking API server running locally (using the provided lisbon read and write APIs) and deploy it to Zeit/Now to make it easily accessible
• Create a hotel booking using this server and retrieve a booking ID
• Create a go app which hits this endpoint
• Create and deploy a Smart contract using Remix. It's for a single hotel booking and it doesn't really do anything.
• Interact with this smart contract using Remix (update and show paid value)

Smart Contract

pragma solidity ^0.4.15;

contract Purchase {
    address buyer;
    address hotelId;
    bytes9 bookingId;
    uint purchaseAmount;
    uint paidAmount = 0;

    event paymentFulfilled();
    event overPayment();
    
    function createBooking(address _hotelId, address _buyer, bytes9 _bookingId, uint _purchaseAmount) public {
        buyer = _buyer;
        hotelId = _hotelId;
        bookingId = _bookingId;
        purchaseAmount = _purchaseAmount;
    }

    function updateValue(uint _amount) public payable returns (uint) {

        if (paidAmount + _amount > purchaseAmount) {
            emit overPayment();
            return 1;
        }

        paidAmount += _amount;
        if (paidAmount == purchaseAmount) {
            emit paymentFulfilled();
            return 0;
        }
    }
    function showValue() public view returns (uint){
        return paidAmount;
    }
}

What we would like to do next:

• Figure out how to create and deploy smart contracts programmatically to handle more than one booking
• Take the hotel ID, booking ID, price, wallet address and the price and create a booking which can then be updated and paid for using ETH
• Figure out a way to make booking data accessible for hotels
• Notify hotels/ users when a room is fully paid for
• Create interfaces to make this pretty

We learned

• Creating wallets
• Smart contracts / Solidity
• WT accounts/organizations
• Ethereum basics