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sogoiii
/ ListenToEventsWeb3-0-20-4.js
Last active
July 31, 2023 06:53
Listening to web3 events in version 0.20.4 and below
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| const Web3 = require('web3') // Works with web3 0.20.4 | |
| const contractArtifact = require('./build/contracts/TutorialToken.json') | |
| const web3 = new Web3() | |
| const providerUrl = 'http://localhost:8545' | |
| const provider = new Web3.providers.HttpProvider(providerUrl) | |
| web3.setProvider(provider) | |
| const networkId = web3.version.network | |
| const contractAddr = contractArtifact.networks[networkId].address |
sogoiii
/ ListenToEventsWeb3-1-0-0-beta.js
Last active
December 26, 2023 23:00
Listening to Solidity events using web3 1.0.0 beta
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| const Web3 = require('web3') // Works with web3 1.0.0-beta27 | |
| const contractArtifact = require('./build/contracts/TutorialToken.json') | |
| const web3 = new Web3() | |
| const providerUrl = 'ws://localhost:8545' // requires # https://github.com/trufflesuite/ganache-cli/releases/tag/v7.0.0-beta.0 or https://github.com/trufflesuite/ganache/releases/tag/v1.1.0-beta.0 | |
| const provider = new Web3.providers.WebsocketProvider(providerUrl) | |
| web3.setProvider(provider) | |
| web3.eth.net.getId() | |
| .then(networkId => { |
sogoiii
/ truffle_contract_example
Created
February 15, 2018 02:11
Truffle contract interaction example
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| import contract from 'truffle-contract' | |
| const contractArtifact = require('./build/contracts/TutorialToken.json') | |
| const web3 = new Web3() | |
| const providerUrl = 'http://localhost:8545' | |
| const provider = new Web3.providers.HttpProvider(providerUrl) | |
| web3.setProvider(provider) | |
| const TutorialToken = contract(contractArtifact) |
sogoiii
/ call_callcode_delegateCall.sol
Last active
March 2, 2021 02:54
Example of call, callcode and delegateCall in solidity: Taken from https://ethereum.stackexchange.com/questions/3667/difference-between-call-callcode-and-delegatecall
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| pragma solidity ^0.4.18; | |
| contract D { | |
| uint public n; | |
| address public sender; | |
| function callSetN(address _e, uint _n) public { | |
| _e.call(bytes4(keccak256("setN(uint256)")), _n); // E's storage is set, D is not modified | |
| } | |
| function callcodeSetN(address _e, uint _n) public { |
sogoiii
/ upgradeWorkerStep1.sol
Created
February 19, 2018 20:43
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| pragma solidity ^0.4.18; | |
| contract Worker1 { | |
| uint public n; | |
| address public sender; | |
| function setN(uint _n) public { | |
| n = _n; | |
| sender = msg.sender; |
sogoiii
/ upgradeWorkerStep2.sol
Created
February 19, 2018 20:44
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| pragma solidity ^0.4.18; | |
| contract Worker1 { | |
| uint public n; | |
| address public sender; | |
| function setN(uint _n) public { | |
| n = _n; | |
| sender = msg.sender; | |
| } |
sogoiii
/ upgradeWorkerStep3.sol
Created
February 19, 2018 21:06
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| pragma solidity ^0.4.18; | |
| contract DB { | |
| uint public data; | |
| function updateData(uint _val) public { | |
| data = _val; | |
| } | |
| } |
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| const sourceFn = ({ contract, method, outputMapper, isCall = true, options }) => { | |
| return async function () { | |
| try { | |
| const instance = await contract.deployed() | |
| const fn = (isCall) | |
| ? instance[method].call(...Object.values(arguments)) | |
| : instance[method](...Object.values(arguments), options) | |
| const data = await fn | |
| return outputMapper(data) | |
| } catch (e) { |
sogoiii
/ handleTestFnExample.js
Created
July 22, 2018 22:04
Example of using handleTestFn to make you Web3js function calls with truffle and ganache-cli.
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| async function handleTestFn(method, inputs) { | |
| try { | |
| return await method(...inputs) | |
| } catch(e) { | |
| return e.receipt | |
| } | |
| } | |
| it('should fail to create an event because eventName is not a string', async function () { | |
| let op1 = await handleTestFn(this.Contract.createEvent, [123456, _eventDescription, _eventWebsite, _eventDate, _location, { from: mainAccount }]) |
sogoiii
/ createEventTestBase.js
Created
July 22, 2018 22:08
Test handles how to create an event for our smart contracts
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| it('should fail to create an event because eventName is not a string', async function () { | |
| let op1 = await this.Contract.createEvent(123456, _eventDescription, _eventWebsite, _eventDate, _location, { from: mainAccount }) | |
| assert.equal(op1.receipt.status, hex.fail, 'TX status should fail') | |
| let CreatedList = await this.Contract.getMyCreatedEvents.call(4, 1) | |
| assert.deepEqual(convertBigNumArr(CreatedList), ['0', '0', '0', '0']) | |
| let EventList = await this.Contract.getAllEvents.call(4, 1) | |
| assert.deepEqual(convertBigNumArr(EventList), ['0', '0', '0', '0']) | |
| }) |