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Amarachi Ugwu amarachiugwu

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@amarachiugwu
amarachiugwu / staking assignment question
Last active August 1, 2022 19:30
// Collect funds in a payable `stake()` function and track individual `balances` with a mapping:
// ( Make sure to add a `Stake(address,uint256)` event and emit)
// After some `deadline` allow anyone to call an `execute()` function
// If the `threshold` was not met, allow everyone to call a `withdraw()` function
// Add a `withdraw()` function to let users withdraw their balance
@amarachiugwu
amarachiugwu / increamentDecreament.sol
Last active August 1, 2022 16:40
increment and decrement a count in solidity
// SPDX-License-Identifier:MIT
pragma solidity ^0.8.0;
contract increamentDecreament {
// counter
uint count = 1;
uint256 deadline = block.timestamp + 30 seconds;
@amarachiugwu
amarachiugwu / simpleDepositContract.sol
Last active August 5, 2022 00:02
a simple deposit contract
// SPDX-License-Identifier: MIT
pragma solidity 0.8.0;
contract simpleDepositContract {
// emit an event when an end users deposits
event depositEvent(address user, uint amount);
// track individual balances
@amarachiugwu
amarachiugwu / vaultClassWork.sol
Created August 4, 2022 20:15
A smart contract that implements dispersion of a grant in a vault
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.8.4;
contract Vault{
// a contract where the owner create grant for a beneficiary;
//allows beneficiary to withdraw only when time elapse
//allows owner to withdraw before time elapse
//get information of a beneficiary
@amarachiugwu
amarachiugwu / vaultAssignment.sol
Created August 5, 2022 10:33
A simple vault contract that disbursts grant to beneficiaries, allowing them to only withdraw all or part of their grant after an elapse time
// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;
contract Vault {
// a contract where the owner creat grant for a beneficiary;
// allow beneficiary to withdrawl only when time elapse
// allow owner to withdrawl before elapse time
// get information of a beneficiary
// amount of ethers in the smart contract
@amarachiugwu
amarachiugwu / EnergyToken.sol
Last active August 6, 2022 15:47
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.8.4;
contract Energy{
//have total supply
//transferrable
//name
//symbol
@amarachiugwu
amarachiugwu / index.html
Created September 26, 2022 05:27 — forked from shobhitic/index.html
Wallet Connect Integration Code - https://youtu.be/Ws5jIo4NMDc
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Wallet Connect</title>
<script src="https://cdn.jsdelivr.net/npm/@walletconnect/web3-provider@1.7.1/dist/umd/index.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/web3@latest/dist/web3.min.js"></script>
</head>
<body>
@amarachiugwu
amarachiugwu / chainlinkVRFv2.sol
Created September 28, 2022 15:51
// SPDX-License-Identifier: MIT
// An example of a consumer contract that relies on a subscription for funding.
pragma solidity ^0.8.7;
import '@chainlink/contracts/src/v0.8/interfaces/VRFCoordinatorV2Interface.sol';
import '@chainlink/contracts/src/v0.8/VRFConsumerBaseV2.sol';
import '@chainlink/contracts/src/v0.8/ConfirmedOwner.sol';
/**
* Request testnet LINK and ETH here: https://faucets.chain.link/
@amarachiugwu
amarachiugwu / DataStore.sol
Created October 18, 2022 15:54
retrieve the data stored to storage by line 10 below
contract DataStore{
uint256[50] _____gap_____;
struct Data{
uint256[] numbers;
bool in__;
bytes32 key;
}
constructor() public{
returnDataSlot().key=keccak256('YEP FOUND IT');
@amarachiugwu
amarachiugwu / Golfer.sol
Created October 18, 2022 19:50
Unoptimized gas golfer contract
contract Golfer {
struct Data{
//always a preset date
uint256 timeStart;
//30 days after the start
uint256 timeFinish;
//names are at most 3 characters long
string name;