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Smart contract solidity -- 2

$30-550 USD

완료함
게시됨 5년 이상 전

$30-550 USD

제출할때 지불됩니다
I need you to build a solidity contract with the following requirement : Write the contract(s) to manage the inventory of a book library. List all assumptions. Code without a corresponding unit test will not be considered.  Requirements  1. The library has an owner and librarians.  2. The owner may add or remove librarians.  3. Only librarians may check books out to an address.  4. A book owner may trade the book to anyone else.  5. Anyone may check in a book.  6. Librarians may add/remove books to the library.  7. Track the history of the book's ownership.  8. Record damage & repair for a book.  9. View book status/history.  10. Log relevant events.  Bonus ● Web3 front end.  ● Token/Fund transfer. Use of the following tools/resources are recommended:  ● Truffle  ● Mocha/Chai  ● OpenZeppelin
프로젝트 ID: 17500506

프로젝트 정보

18 제안서
원격근무 프로젝트
활동 중 6년 전

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프로젝트를 수여된 사용자:
사용자 아바타
Greetings, My name is Papan Das and I am a  Blockchain developer. I would love to have the opportunity to discuss your project with you. I have 8 years of experience in Full Stack Development. Hyperledger-Ethereum-POC [login to view URL] Food Chain : [login to view URL] Jobs Portail: [login to view URL] ICO - Token Sale: [login to view URL] I believe communication is key to any successful project, and I’d like to start things off on the right foot but suggesting we schedule a phone or S ky pe call to discuss the project further. This will enable us to make sure we communicate well and that both parties are completely comfortable with the scope of the project. Please let me know a time that works best for you and I will make sure that I make myself available. Thank you for your time and consideration. With Regards, Papan Das S ky pe: hexoindia
$550 USD 20일에
4.8 (6 건의 리뷰)
4.8
4.8
18 이 프로젝트에 프리랜서들의 평균 입찰은 $1,102 USD입니다.
사용자 아바타
Hey so this is just a ERC721 contract with a few extra functions for librarian permisions. I can do it in a few days for you. One thing I wanted to ask is how the books get damaged?
$250 USD 3일에
4.9 (17 건의 리뷰)
6.9
6.9
사용자 아바타
From cryptocurrency Expert! Dear client! I have a rich experience in this field! Especially I’m very good in Ethereum smart contract. Seems to be an interesting work and good opportunity to show my skills to work with you in future as well. Hope to have a long-term work relationship with you. I'm a professional developer with over 10 years. so that I can bring your idea to live and you can reach the goal absolutely with me. I will be happy to discuss with you via chat. Best Regards!
$2,000 USD 3일에
4.9 (8 건의 리뷰)
6.5
6.5
사용자 아바타
Hi, I'm an Ethereum Developer, I create and deploy the smart contract in main network. I develop also with web3js to create web page to interact with the smart contract. I can create the dapp on test network before hire. Let me know your feedback.
$222 USD 3일에
5.0 (3 건의 리뷰)
3.2
3.2
사용자 아바타
Hi, I can see that you’re looking for a Smart Contract developer who can write contract to manage the inventory of a book library for you. I have experience in BlockChain ( ERC20, SmartContract & Solidity) and have worked on Daap as well. In a centralized system, I have integrated BTC, ETH & LTC, currently integrating Ripple. Please initiate the chat so that can share Non-NDA similar works & discuss your requirements in detail. I look forward to hearing from you. With regards, Ezaj A ArStudioz P.S: Bid amount is just a placeholder bid, I will give you FIRM bid once we have the complete understanding of the project.
$3,500 USD 10일에
0.0 (0 건의 리뷰)
0.0
0.0
사용자 아바타
Greeting from Nexus Infotechno Inc, I have read your requirements carefully and it meets with our skills .Our team will assist you well in this regards. We have specialization in block chain technology and we have worked on bitcoin ,currency exchange etc Looking forward to hearing from you. Regards; Ashish P. Business Executive
$2,777 USD 15일에
0.0 (0 건의 리뷰)
0.0
0.0
사용자 아바타
Hello, We have solid experience in dealing with ICO projects from their initial stages to their successful launch. We would like to schedule a moment to talk to you about specific ideas we have for you. I'd welcome a call or an email from you to do so soon. Thank you kindly for your consideration. Madhu
$155 USD 4일에
0.0 (0 건의 리뷰)
0.0
0.0
사용자 아바타
hi there, i have build hyperledger based blockchain solutions for different companies regarding different usecases in the last 7-8 months. some of usecases i build on hyperledger are: :: food supply chain. agralogics. :: Item auction system. :: survey. :: job portal. and some more too. i have reviewed your description and i am pretty sure that i can provide you what you are looking for if you dont want cryptocurrency in it. hire me and consider it done. thanks.
$777 USD 10일에
0.0 (0 건의 리뷰)
0.0
0.0

고객에 대한 정보

국기 (UNITED STATES)
Jamaica, United States
5.0
21
결제 수단 확인
5월 8, 2017부터 회원입니다

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