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Write javascript function(s) and work with web3 to communicate with smart contract (solidity)

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INFO: PLEASE READ COMPLETELY, OTHERWISE I REJECT YOUR OFFER.

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Hello,

I have a project where I need someone with experience in javascript AND solidity/web3.

Basic information:

The project is an product marketplace, built on the ethereum blockchain with a smart contract. Users can place articles through some clicks and the articles will be saved on the blockchain through the smart contract functions.

Following information:

Smart contract (basic information):

I am not allowed to share too much about the smart contract, but I share some information.

The articles are stored in an array named articles.

Articles are built with a struct with following variables: seller, price, bid, bidder.

Following functions are used: function getArticle(uint id) returns the seller, price, bid and bidder.

Website (basic information):

Best way to explain is to see the website as eBay. It has on the homepage the most recent 10 articles.

What do I need help with?

I built already website and contract. Now I need help with calling the contract through javascript and web3/MetaMask. Following should happen:

1. When the user visits the website, the recent 10 auctions should be loaded and displayed in a div-element on the website. The call getArticlesAmount() returns a uint with the length of the array articles. Then the recent 10 should be loaded with the call getArticlesInfo which as said above returns the info of the article.

2. Those 10 articles should be called every second. For example when a user is on the website and someone bids an offer on one of these articles, the user should immediatly see it.

So I need only someone who has experience in javascript and web3. I won't share ABI or more contract source as that's enough for now. If you can't work with this information, please do not apply.

Please share as much information as possible, about how long you need for it, how much it costs etc. Thanks!

Taidot: Javascript

Näytä lisää: initialize web3, web3 call contract method, web3 interact with contract, web3 ethereum example, web3 watch events, web3 call contract function, web3 source code, web3 getdata, write custom error handling javascript function called processerrors, javascript write dynamic function, can write select function javascript, convert javascript function, write javascript function mysql query, javascript function stm, javascript function age

Tietoa työnantajasta:
( 0 arvostelua ) Germany

Projektin tunnus: #17162284

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