Vedant-S / CryptoBuyer

CryptoBuyer is a prototype. It is a Marketplace that runs over the Ethereum Blockchain. It is able to manage products (and orders, too).

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CryptoBuyer - Decentralized Marketplace on Ethereum Blockchain:

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CryptoBuyer is a prototype. It is a Marketplace that runs over the Ethereum Blockchain. It is able to manage products (and orders, too).

Since it runs over the blockchain it doesn't need to have any server.

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How to use it:

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You can run it by yourself. In order to run this files you have to use something that inject Web3 into the webpage, the simplest way is to use Chrome with MetaMask Extension installed.

Remember, if you would like to use your machine to use it, you have to run a webserver (and not file://), otherwise MetaMask cannot inject the code due security restrictions.

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Contract:

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The contract is developed using Solidity. It is actually deployed over Rinbeky Ethereum Test Net. You can use this code to understand how Solidity works. In order to deploy your own contract, you can refer to this page.

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API

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getOwnOrders() returns(uint[])

Returns the ids of the orders that refers to product sold by the msg.sender.

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getProductIdsBySeller(address _seller) returns(uint[])

Returns the ids of product sold by specific address.

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buyProduct(uint _id, uint32 _quantity, string _shippingAddress) payable

Is the only payable function of the contract. If the msg.value is equal to the price of the product with id equals to _id, then decrease the product avaiable quantity and create an order.

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orders

This is the dynamic arrays that stores all the orders created. The Order has the following structure:

struct Order {
        string shippingAddress;
        uint32 quantity;
        uint productId;
    }

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addProduct(string _n, string _d, uint _p, uint _q)

This function add a product to products dynamic array. Set the linked proprieties stored into the following self-described maps:

	mapping(uint => address) public productToSeller;
    mapping(address => uint32) public sellerProductCounter;

At the end generated the following event NewProductCreated(address seller, uint productId);.

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removeProduct(uint _productId)

This function delete the product from the products array. It can be executed only by the product's seller.

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What's next:

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The orders are not yet implemented.

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Author:

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+ Vedant Shrivastava | [e-mail]