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





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!

Kemahiran: Javascript

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Tentang Majikan:
( 0 ulasan ) Germany

ID Projek: #17162284

14 pekerja bebas membida secara purata €171 untuk pekerjaan ini

€155 EUR dalam 3 hari
(19 Ulasan)

Hi, I am an experienced programmer and I'm sure I can complete your project asap. Please contact me and tell about your project details. I promise a high quality and punctual work. Thanks. Write javascript function(s) Lagi

€155 EUR dalam sehari
(8 Ulasan)

Hello, "Greetings from Imperial Softech". I have read your complete description of Project. I have a team of experienced developers and we work on Solidity, Web3, Ethereum Tokens - ERC20, DApps, Smart Cont Lagi

€150 EUR dalam 3 hari
(3 Ulasan)

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€155 EUR dalam sehari
(3 Ulasan)

hi,dear. We understand your requirements and I am very interested in this job - 'Write javascript function(s) and work with web3 to communicate with smart contract (solidity)'. We are senior software developers and I a Lagi

€155 EUR dalam sehari
(7 Ulasan)

Did similar work before, need discussion I have developed and deployed many smart contracts based on ethereum network I have also setup a web app for ICO here are my website 1. [login to view URL] 2. Ca Lagi

€277 EUR dalam 5 hari
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Hello, I have 6+  years experience in PHP, WordPress  & Codeigniter. I Read your job description, I'm interesting  in your job.  we feel that we are suitable for the job.  As a senior WordPress expert, I'll be glad to Lagi

€211 EUR dalam 3 hari
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I have more than 4 years experience in PHP programming and well versed in android and in open-sources / Framework like Codeigniter , OpenCart, Wordpress and other Web solutions . My strengths are web development, PHP, Lagi

€155 EUR dalam 3 hari
(0 Ulasan)

I have excellent hand with DaPP. HIGHLY interested with your project. I'm ready to start right now. My completion rate is always 100% and I STRICTLY BITE WHICH I CAN CHEW. Knock me please

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My Expertise includes Php,Laravel, CakePhp, CodeIginator, Bootstrap. I have more than 7 years of exp, successfully integrated many latest scripts while working on front-end and as well as on back-end. We have 6.5 Lagi

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Hi, My name is Atif Zahid, Founder & CEO at Maxnet Technologies ([login to view URL]). I hope this note finds you well and you having a great day. Quick favor if you could find time to go through my portfolio below. Lagi

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