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Created using remix-ide: Realtime Ethereum Contract Compiler and Runtime. Load this file by pasting this gists URL or ID at https://remix.ethereum.org/#version=soljson-v0.8.9+commit.e5eed63a.js&optimize=true&runs=200&gist=
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| Minertech | |
| Minertech is present when Remix loads very first time or there are no files existing in the File Explorer. | |
| It contains 3 directories: | |
| 1. 'contracts': Holds three contracts with different complexity level, denoted with number prefix in file name. | |
| 2. 'scripts': Holds two scripts to deploy a contract. It is explained below. | |
| 3. 'tests': Contains one test file for 'Ballot' contract with unit tests in Solidity. | |
| SCRIPTS | |
| The 'scripts' folder contains example async/await scripts for deploying the 'Storage' contract. | |
| For the deployment of any other contract, 'contractName' and 'constructorArgs' should be updated (along with other code if required). | |
| Scripts have full access to the web3.js and ethers.js libraries. | |
| To run a script, right click on file name in the file explorer and click 'Run'. Remember, Solidity file must already be compiled. | |
| Output from script will appear in remix terminal. | |
| Made with Love By KOSASIH | |
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| // SPDX-License-Identifier: GPL-3.0 | |
| pragma solidity >=0.7.0 <0.9.0; | |
| /** | |
| * @title Storage | |
| * @dev Store & retrieve value in a variable | |
| */ | |
| contract Storage { | |
| uint256 number; | |
| /** | |
| * @dev Store value in variable | |
| * @param num value to store | |
| */ | |
| function store(uint256 num) public { | |
| number = num; | |
| } | |
| /** | |
| * @dev Return value | |
| * @return value of 'number' | |
| */ | |
| function retrieve() public view returns (uint256){ | |
| return number; | |
| } | |
| } |
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| // SPDX-License-Identifier: GPL-3.0 | |
| pragma solidity >=0.7.0 <0.9.0; | |
| /** | |
| * @title Owner | |
| * @dev Set & change owner | |
| */ | |
| contract Owner { | |
| address private owner; | |
| // event for EVM logging | |
| event OwnerSet(address indexed oldOwner, address indexed newOwner); | |
| // modifier to check if caller is owner | |
| modifier isOwner() { | |
| // If the first argument of 'require' evaluates to 'false', execution terminates and all | |
| // changes to the state and to Ether balances are reverted. | |
| // This used to consume all gas in old EVM versions, but not anymore. | |
| // It is often a good idea to use 'require' to check if functions are called correctly. | |
| // As a second argument, you can also provide an explanation about what went wrong. | |
| require(msg.sender == owner, "Caller is not owner"); | |
| _; | |
| } | |
| /** | |
| * @dev Set contract deployer as owner | |
| */ | |
| constructor() { | |
| owner = msg.sender; // 'msg.sender' is sender of current call, contract deployer for a constructor | |
| emit OwnerSet(address(0), owner); | |
| } | |
| /** | |
| * @dev Change owner | |
| * @param newOwner address of new owner | |
| */ | |
| function changeOwner(address newOwner) public isOwner { | |
| emit OwnerSet(owner, newOwner); | |
| owner = newOwner; | |
| } | |
| /** | |
| * @dev Return owner address | |
| * @return address of owner | |
| */ | |
| function getOwner() external view returns (address) { | |
| return owner; | |
| } | |
| } |
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| // SPDX-License-Identifier: GPL-3.0 | |
| pragma solidity >=0.7.0 <0.9.0; | |
| /** | |
| * @title Ballot | |
| * @dev Implements voting process along with vote delegation | |
| */ | |
| contract Ballot { | |
| struct Voter { | |
| uint weight; // weight is accumulated by delegation | |
| bool voted; // if true, that person already voted | |
| address delegate; // person delegated to | |
| uint vote; // index of the voted proposal | |
| } | |
| struct Proposal { | |
| // If you can limit the length to a certain number of bytes, | |
| // always use one of bytes1 to bytes32 because they are much cheaper | |
| bytes32 name; // short name (up to 32 bytes) | |
| uint voteCount; // number of accumulated votes | |
| } | |
| address public chairperson; | |
| mapping(address => Voter) public voters; | |
| Proposal[] public proposals; | |
| /** | |
| * @dev Create a new ballot to choose one of 'proposalNames'. | |
| * @param proposalNames names of proposals | |
| */ | |
| constructor(bytes32[] memory proposalNames) { | |
| chairperson = msg.sender; | |
| voters[chairperson].weight = 1; | |
| for (uint i = 0; i < proposalNames.length; i++) { | |
| // 'Proposal({...})' creates a temporary | |
| // Proposal object and 'proposals.push(...)' | |
| // appends it to the end of 'proposals'. | |
| proposals.push(Proposal({ | |
| name: proposalNames[i], | |
| voteCount: 0 | |
| })); | |
| } | |
| } | |
| /** | |
| * @dev Give 'voter' the right to vote on this ballot. May only be called by 'chairperson'. | |
| * @param voter address of voter | |
| */ | |
| function giveRightToVote(address voter) public { | |
| require( | |
| msg.sender == chairperson, | |
| "Only chairperson can give right to vote." | |
| ); | |
| require( | |
| !voters[voter].voted, | |
| "The voter already voted." | |
| ); | |
| require(voters[voter].weight == 0); | |
| voters[voter].weight = 1; | |
| } | |
| /** | |
| * @dev Delegate your vote to the voter 'to'. | |
| * @param to address to which vote is delegated | |
| */ | |
| function delegate(address to) public { | |
| Voter storage sender = voters[msg.sender]; | |
| require(!sender.voted, "You already voted."); | |
| require(to != msg.sender, "Self-delegation is disallowed."); | |
| while (voters[to].delegate != address(0)) { | |
| to = voters[to].delegate; | |
| // We found a loop in the delegation, not allowed. | |
| require(to != msg.sender, "Found loop in delegation."); | |
| } | |
| sender.voted = true; | |
| sender.delegate = to; | |
| Voter storage delegate_ = voters[to]; | |
| if (delegate_.voted) { | |
| // If the delegate already voted, | |
| // directly add to the number of votes | |
| proposals[delegate_.vote].voteCount += sender.weight; | |
| } else { | |
| // If the delegate did not vote yet, | |
| // add to her weight. | |
| delegate_.weight += sender.weight; | |
| } | |
| } | |
| /** | |
| * @dev Give your vote (including votes delegated to you) to proposal 'proposals[proposal].name'. | |
| * @param proposal index of proposal in the proposals array | |
| */ | |
| function vote(uint proposal) public { | |
| Voter storage sender = voters[msg.sender]; | |
| require(sender.weight != 0, "Has no right to vote"); | |
| require(!sender.voted, "Already voted."); | |
| sender.voted = true; | |
| sender.vote = proposal; | |
| // If 'proposal' is out of the range of the array, | |
| // this will throw automatically and revert all | |
| // changes. | |
| proposals[proposal].voteCount += sender.weight; | |
| } | |
| /** | |
| * @dev Computes the winning proposal taking all previous votes into account. | |
| * @return winningProposal_ index of winning proposal in the proposals array | |
| */ | |
| function winningProposal() public view | |
| returns (uint winningProposal_) | |
| { | |
| uint winningVoteCount = 0; | |
| for (uint p = 0; p < proposals.length; p++) { | |
| if (proposals[p].voteCount > winningVoteCount) { | |
| winningVoteCount = proposals[p].voteCount; | |
| winningProposal_ = p; | |
| } | |
| } | |
| } | |
| /** | |
| * @dev Calls winningProposal() function to get the index of the winner contained in the proposals array and then | |
| * @return winnerName_ the name of the winner | |
| */ | |
| function winnerName() public view | |
| returns (bytes32 winnerName_) | |
| { | |
| winnerName_ = proposals[winningProposal()].name; | |
| } | |
| } |
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| } | |
| ], | |
| "stateMutability": "view", | |
| "type": "function" | |
| }, | |
| { | |
| "inputs": [ | |
| { | |
| "internalType": "uint256", | |
| "name": "num", | |
| "type": "uint256" | |
| } | |
| ], | |
| "name": "store", | |
| "outputs": [], | |
| "stateMutability": "nonpayable", | |
| "type": "function" | |
| } | |
| ] | |
| } |
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| { | |
| "compiler": { | |
| "version": "0.8.9+commit.e5eed63a" | |
| }, | |
| "language": "Solidity", | |
| "output": { | |
| "abi": [ | |
| { | |
| "inputs": [], | |
| "name": "retrieve", | |
| "outputs": [ | |
| { | |
| "internalType": "uint256", | |
| "name": "", | |
| "type": "uint256" | |
| } | |
| ], | |
| "stateMutability": "view", | |
| "type": "function" | |
| }, | |
| { | |
| "inputs": [ | |
| { | |
| "internalType": "uint256", | |
| "name": "num", | |
| "type": "uint256" | |
| } | |
| ], | |
| "name": "store", | |
| "outputs": [], | |
| "stateMutability": "nonpayable", | |
| "type": "function" | |
| } | |
| ], | |
| "devdoc": { | |
| "details": "Store & retrieve value in a variable", | |
| "kind": "dev", | |
| "methods": { | |
| "retrieve()": { | |
| "details": "Return value ", | |
| "returns": { | |
| "_0": "value of 'number'" | |
| } | |
| }, | |
| "store(uint256)": { | |
| "details": "Store value in variable", | |
| "params": { | |
| "num": "value to store" | |
| } | |
| } | |
| }, | |
| "title": "Storage", | |
| "version": 1 | |
| }, | |
| "userdoc": { | |
| "kind": "user", | |
| "methods": {}, | |
| "version": 1 | |
| } | |
| }, | |
| "settings": { | |
| "compilationTarget": { | |
| "contracts/1_Storage.sol": "Storage" | |
| }, | |
| "evmVersion": "london", | |
| "libraries": {}, | |
| "metadata": { | |
| "bytecodeHash": "ipfs" | |
| }, | |
| "optimizer": { | |
| "enabled": true, | |
| "runs": 200 | |
| }, | |
| "remappings": [] | |
| }, | |
| "sources": { | |
| "contracts/1_Storage.sol": { | |
| "keccak256": "0xb6ee9d528b336942dd70d3b41e2811be10a473776352009fd73f85604f5ed206", | |
| "license": "GPL-3.0", | |
| "urls": [ | |
| "bzz-raw://fe52c6e3c04ba5d83ede6cc1a43c45fa43caa435b207f64707afb17d3af1bcf1", | |
| "dweb:/ipfs/QmawU3NM1WNWkBauRudYCiFvuFE1tTLHB98akyBvb9UWwA" | |
| ] | |
| } | |
| }, | |
| "version": 1 | |
| } |
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| {"compiler":{"version":"0.8.9+commit.e5eed63a"},"language":"Solidity","output":{"abi":[{"inputs":[],"name":"retrieve","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"num","type":"uint256"}],"name":"store","outputs":[],"stateMutability":"nonpayable","type":"function"}],"devdoc":{"details":"Store & retrieve value in a variable","kind":"dev","methods":{"retrieve()":{"details":"Return value ","returns":{"_0":"value of 'number'"}},"store(uint256)":{"details":"Store value in variable","params":{"num":"value to store"}}},"title":"Storage","version":1},"userdoc":{"kind":"user","methods":{},"version":1}},"settings":{"compilationTarget":{"contracts/1_Storage.sol":"Storage"},"evmVersion":"london","libraries":{},"metadata":{"bytecodeHash":"ipfs"},"optimizer":{"enabled":true,"runs":200},"remappings":[]},"sources":{"contracts/1_Storage.sol":{"keccak256":"0xb6ee9d528b336942dd70d3b41e2811be10a473776352009fd73f85604f5ed206","license":"GPL-3.0","urls":["bzz-raw://fe52c6e3c04ba5d83ede6cc1a43c45fa43caa435b207f64707afb17d3af1bcf1","dweb:/ipfs/QmawU3NM1WNWkBauRudYCiFvuFE1tTLHB98akyBvb9UWwA"]}},"version":1} |
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| // Right click on the script name and hit "Run" to execute | |
| (async () => { | |
| try { | |
| console.log('Running deployWithEthers script...') | |
| const contractName = 'Storage' // Change this for other contract | |
| const constructorArgs = [] // Put constructor args (if any) here for your contract | |
| // Note that the script needs the ABI which is generated from the compilation artifact. | |
| // Make sure contract is compiled and artifacts are generated | |
| const artifactsPath = `browser/contracts/artifacts/${contractName}.json` // Change this for different path | |
| const metadata = JSON.parse(await remix.call('fileManager', 'getFile', artifactsPath)) | |
| // 'web3Provider' is a remix global variable object | |
| const signer = (new ethers.providers.Web3Provider(web3Provider)).getSigner() | |
| let factory = new ethers.ContractFactory(metadata.abi, metadata.data.bytecode.object, signer); | |
| let contract = await factory.deploy(...constructorArgs); | |
| console.log('Contract Address: ', contract.address); | |
| // The contract is NOT deployed yet; we must wait until it is mined | |
| await contract.deployed() | |
| console.log('Deployment successful.') | |
| } catch (e) { | |
| console.log(e.message) | |
| } | |
| })() |
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| // Right click on the script name and hit "Run" to execute | |
| (async () => { | |
| try { | |
| console.log('Running deployWithWeb3 script...') | |
| const contractName = 'Storage' // Change this for other contract | |
| const constructorArgs = [] // Put constructor args (if any) here for your contract | |
| // Note that the script needs the ABI which is generated from the compilation artifact. | |
| // Make sure contract is compiled and artifacts are generated | |
| const artifactsPath = `browser/contracts/artifacts/${contractName}.json` // Change this for different path | |
| const metadata = JSON.parse(await remix.call('fileManager', 'getFile', artifactsPath)) | |
| const accounts = await web3.eth.getAccounts() | |
| let contract = new web3.eth.Contract(metadata.abi) | |
| contract = contract.deploy({ | |
| data: metadata.data.bytecode.object, | |
| arguments: constructorArgs | |
| }) | |
| const newContractInstance = await contract.send({ | |
| from: accounts[0], | |
| gas: 1500000, | |
| gasPrice: '30000000000' | |
| }) | |
| console.log('Contract deployed at address: ', newContractInstance.options.address) | |
| } catch (e) { | |
| console.log(e.message) | |
| } | |
| })() |
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| // SPDX-License-Identifier: GPL-3.0 | |
| pragma solidity >=0.7.0 <0.9.0; | |
| import "remix_tests.sol"; // this import is automatically injected by Remix. | |
| import "../contracts/3_Ballot.sol"; | |
| contract BallotTest { | |
| bytes32[] proposalNames; | |
| Ballot ballotToTest; | |
| function beforeAll () public { | |
| proposalNames.push(bytes32("candidate1")); | |
| ballotToTest = new Ballot(proposalNames); | |
| } | |
| function checkWinningProposal () public { | |
| ballotToTest.vote(0); | |
| Assert.equal(ballotToTest.winningProposal(), uint(0), "proposal at index 0 should be the winning proposal"); | |
| Assert.equal(ballotToTest.winnerName(), bytes32("candidate1"), "candidate1 should be the winner name"); | |
| } | |
| function checkWinninProposalWithReturnValue () public view returns (bool) { | |
| return ballotToTest.winningProposal() == 0; | |
| } | |
| } |
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