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Blockchain and Cryptocurrency Project

$10-30 USD

Closed
Posted almost 5 years ago

$10-30 USD

Paid on delivery
Mr. Mark has written his will. According to his will if his son Jack successfully gets his undergrad degree then he will be entitled to get his share of money from Mr. Mark's wealth. If not, then the money will go to an NGO(that helps homeless) and Jack will get nothing. For This purpose Mr. Mark, writes a smart contract and deploys it. Before deploying the smart contract Mr. Mark generated a password and divided it in two parts. He(Mr. Mark) gave the first part of the password to his son and another to his attorney. if Jack successfully graduates he can ask the attorney for the second part and withdraw the money. If deadline has passed, the attorney can share the password he has with the NGO and the NGO can withdraw the money and kill the contract. The smart contract should (at least) have the following functions. Feel free to add more functions. Be innovative. Smart Contract: 1: Constructor function Constructor function should assign values to deadline, first and second part of the password as well as the amount of ethers to be given 2: Withdraw function: Jack can only withdraw ethers if he has both parts of the password. He should also claim the amount before deadline 3: Cancel Withdraw: The NGO can withdraw the money using the second part of the password after deadline and kill the contract. Build a unit test, to test your withdraw function for two cases: 1: When both passwords are correct and deadline is not reached 2: When one or both pieces of password are incorrect and show that your function works accordingly. UI Build a simple user Interface where Jack can enter both pieces of the password and the address where he wants ethers/wei to be transfered. You can use any of ten testrpc addresses for this purpose except the first account ([login to view URL][0]). The UI should also have a button where upon clicking the button, Withdraw() function will be called in your contract.
Project ID: 19331985

About the project

9 proposals
Remote project
Active 5 yrs ago

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9 freelancers are bidding on average $526 USD for this job
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I can do this. Uk based and English native. Fully qualified in all blockchain developer technologies, also an early crypto investor. Check my profile for work samples and technology stack. I’m really looking forward to working with you. Jamie
$444 USD in 5 days
4.9 (10 reviews)
5.3
5.3
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Hey, I have a lot of experience developing smart contracts and writing unit tests for them. I can develop this escrow based smart contract DApp for you. Kindly message me to take this further.
$100 USD in 3 days
5.0 (8 reviews)
4.9
4.9
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Hello sir Thanks for posting job...!! We have vast experience on block chain development like token and smart contract development using solidity, Coin Development, ICO Development, exchange and trading platform development..etc. Here I would like to share Crypto Coin development steps are as- Key Features for the Coin Development: Master node setup Setup coin entities Compile code for the coin generation generate block hash Pool mining setup Implement POW and POS Algo's Block Explorer Web wallet Development Admin Wallet Development Smart contract Exchange Connectivity API Skill We have for the project are as- • Nodejs, C, Typescript, Java • Blockchain o Tangle and IOTA o Forking and working with Consensus o POW schemes - asic resistant pow such as hashcash • Cryptography o Scrypt/SHA-256/SHA-3/keccak256 • Signature schemes o DSA/ECDSA/RSA o Schnorr/Lamport/Winternitz/BLS • Defensive Programming • Unit-Testing Framework, like Mocha. • Git / Github • Management - Jira Please message me so I can explain you each step of development by showing you demo about the project. Awaiting for your response. Thanks and Regards Akshay Yadav
$25 USD in 1 day
0.0 (1 review)
0.0
0.0
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A very interesting idea. And I would add a NGO adress in the smart-contract so the second password will only send ETH to that after the timelimit is ended. We can make this contract for 650$ and it will take 1 week to finish.
$722 USD in 7 days
0.0 (0 reviews)
0.0
0.0
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It starts with development standards to delivery of product. Only the best are accepted. We have strict quality checks and strategies which leads to exceptional product. We have blockchain experties working with us. Looking forward for positive response.
$555 USD in 5 days
0.0 (0 reviews)
0.0
0.0

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Flag of UNITED STATES
New York, United States
5.0
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Member since Feb 23, 2018

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