devtooligan

// @author original POC by @z0age


library pureConsole {

    /*********************
     * string + uint256
     ********************/

    function log(string memory errorMessage, uint256 value) internal pure {

z0r0z

// SPDX-License-Identifier: GPL-3.0-or-later

pragma solidity >=0.8.4;

/// @notice Simple gas-optimized multi-signature contract.
contract Multisig {
    event Propose(address indexed proposer, uint256 indexed proposal);
    event Sign(address indexed signer, uint256 indexed proposal);
    event Execute(uint256 indexed proposal);

z0r0z

// SPDX-License-Identifier: GPL-3.0-or-later

pragma solidity >=0.8.4;
/// @notice Simple gas-optimized multi-signature contract.
contract Multisig {
    event Propose(address indexed proposer, uint256 indexed proposal);
    event Sign(address indexed signer, uint256 indexed proposal);
    event Execute(uint256 indexed proposal);

    error NotSigner();

karmacoma-eth

Sending Ether Cheat Sheet

TLDR

🥇 Instead of sending Ether, use the withdrawal pattern

🥈 If you really need to send Ether, use a safe wrapper like OpenZeppelin's Address.sendValue(addr, amount)

🥉 If you really need to send Ether without dependencies, use (bool success, ) = addr.call{value: amount}("")

yorickdowne

Note: PBSS in Geth >=1.13.0 removes the need to prune manually.

---

Old content for reference

Overview

Geth (Go-Ethereum) as of July 2022 takes about 650 GiB of space on a fast/snap sync, and then grows by ~ 14 GiB/week with default cache, ~ 8 GiB/week with more cache.

maqnouch

⚠️ Obsolete guide

Please check the new Guide

Signal Server Installation Guide

Author: Aqnouch Mohammed aqnouch.mohammed@gmail.com

inovizz

const fs = require("fs");
const solc = require('solc')
let Web3 = require('web3');

let web3 = new Web3();
web3.setProvider(new web3.providers.HttpProvider('http://localhost:8545'));

var input = {
    'strings.sol': fs.readFileSync('strings.sol', 'utf8'),
    'StringLib.sol': fs.readFileSync('StringLib.sol', 'utf8'),

bellaj

Solidity lets you program on Ethereum, a blockchain-based virtual machine that allows the creation and execution of smart contracts, without needing centralized or trusted parties.
Solidity is a statically typed, contract programming language that has similarities to Javascript and C. Like objects in OOP, each contract contains state variables, functions, and common data types. Contract-specific features include modifier (guard) clauses, event notifiers for listeners, and custom global variables.
Some Ethereum contract examples include crowdfunding, voting, and blind auctions.
As Solidity and Ethereum are under active development, experimental or beta features are explicitly marked, and subject to change. Pull requests welcome.
// First, a simple Bank contract
// Allows deposits, withdrawals, and balance checks

// simple_bank.sol (note .sol extension)
/* **** START EXAMPLE **** */

xavierlepretre

const Promise = require("bluebird");
const sequentialPromise = require("./sequentialPromise.js");

/**
 * @param {!string | !Array.<!string>} txHash, a transaction hash or an array of transaction hashes.
 * @param {Number} interval, in seconds.
 * @returns {!Promise.<!object> | !Promise.<!Array.<!object>>} the receipt or an array of receipts.
 */
module.exports = function getTransactionReceiptMined(txHash, interval) {
    const self = this;

IamAdiSri

First install pip for Python2. Download the get-pip.py file from https://bootstrap.pypa.io/get-pip.py
$ cd <download location>
$ sudo -H python ./get-pip.py

Installing pip also installs Python3
To run Python3
$ python3

Install pip3 by just executing the same file as in the step above, but this time using Python3
$ sudo -H python3 ./get-pip.py