Skip to content

Instantly share code, notes, and snippets.

@achiko
achiko / sendRawTransaction.js
Created November 15, 2019 13:40 — forked from raineorshine/sendRawTransaction.js
Sends a raw transaction with web3 v1.2.2, ethereumjs-tx v2.1.1, and Infura
const Web3 = require('web3')
const Tx = require('ethereumjs-tx').Transaction
// connect to Infura node
const web3 = new Web3(new Web3.providers.HttpProvider('https://mainnet.infura.io/INFURA_KEY'))
// the address that will send the test transaction
const addressFrom = '0x1889EF49cDBaad420EB4D6f04066CA4093088Bbd'
const privateKey = new Buffer('PRIVATE_KEY', 'hex')
admin.addPeer("enode://03f178d5d4511937933b50b7af683b467abaef8cfc5f7c2c9b271f61e228578ae192aaafc7f0d8035dfa994e734c2c2f72c229e383706be2f4fa43efbe9f94f4@163.172.149.200:30303");
admin.addPeer("enode://0a3c4c4f5b2f46c5b343fd9c4ad28e6413d475d2c4d41b454e50c51ecdb1c2f3e6002fdac5e9639eaf0cb9425efff95cd89c1bdd2d167217e0becf28f3b8660f@88.95.162.200:30303");
admin.addPeer("enode://1118980bf48b0a3640bdba04e0fe78b1add18e1cd99bf22d53daac1fd9972ad650df52176e7c7d89d1114cfef2bc23a2959aa54998a46afcf7d91809f0855082@52.74.57.123:30303");
admin.addPeer("enode://138ec659b5ec02029c0c08d4a8f377174622c4d4f8684cf22bd6393a1e46e731ed1bf87249f4003f4c47f7a39611c39e0dc7004091604183d6e5781f1eaf81be@79.98.29.93:30303");
admin.addPeer("enode://158f8aab45f6d19c6cbf4a089c2670541a8da11978a2f90dbf6a502a4a3bab80d288afdbeb7ec0ef6d92de563767f3b1ea9e8e334ca711e9f8e2df5a0385e8e6@13.75.154.138:30303");
admin.addPeer("enode://1a5a1fc361f3f25d3d8e0dfd2f059cd4b6fb7228c7163d232d657377818dc5f7f89426fdcb92d6cc9fd49f2f96fbe4a14c3a8d070e56ed7bee536f1bb014065
0x00 0 STOP
0x01 3 ADD
0x02 5 MUL
0x03 3 SUB
0x04 5 DIV
0x05 5 SDIV
0x06 5 MOD
0x07 5 SMOD
0x08 8 ADDMOD
0x09 8 MULMOD
var libxmljs = require("libxmljs");
var xml = [
'<?xml version="1.0" encoding="utf-8"?>',
'<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema">',
' <soap:Body>',
' <Response xmlns="http://tempuri.org/">',
' <Result>',
' <client xmlns="">',
' <msg>SEARCH OK.</msg>',
' <code>0</code>',
@achiko
achiko / postgres_queries_and_commands.sql
Created November 24, 2016 12:28 — forked from rgreenjr/postgres_queries_and_commands.sql
Useful PostgreSQL Queries and Commands
-- show running queries (pre 9.2)
SELECT procpid, age(query_start, clock_timestamp()), usename, current_query
FROM pg_stat_activity
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%'
ORDER BY query_start desc;
-- show running queries (9.2)
SELECT pid, age(query_start, clock_timestamp()), usename, query
FROM pg_stat_activity
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%'
@achiko
achiko / Random generator
Created March 21, 2016 12:38 — forked from alexvandesande/Random generator
A very simple random generator. A miner can influence the number by not publishing a block with an unwanted outcome, and forfeiting the 5 block reward.
contract random {
/* Generates a random number from 0 to 100 based on the last block hash */
function randomGen(uint seed) constant returns (uint randomNumber) {
return(uint(sha3(block.blockhash(block.number-1), seed ))%100);
}
/* generates a number from 0 to 2^n based on the last n blocks */
function multiBlockRandomGen(uint seed, uint size) constant returns (uint randomNumber) {
uint n = 0;
for (uint i = 0; i < size; i++){
contract tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData); }
contract MyToken {
/* Public variables of the token */
string public name;
string public symbol;
uint8 public decimals;
/* This creates an array with all balances */
mapping (address => uint256) public balanceOf;
contract owned {
address public owner;
function owned() {
owner = msg.sender;
}
modifier onlyOwner {
if (msg.sender != owner) throw;
_
}
function transferOwnership(address newOwner) onlyOwner {
@achiko
achiko / 2of3.md
Last active August 29, 2015 14:22 — forked from anonymous/2of3.md

2-of-3 Escrow Example with Electrum

This is gmaxwell's 2-of-2 escrow example, adapted to Electrum and to a lesser extent, GFM.

The Scenario

Archey wants to pay Bertha 0.001 BTC for a Twitter Platinum invite, but prevent Bertha from cheating him. Archey selects Iceland to act as

var urls = [
/* Wildcard CORS enabled - Works in PhantomJS 1.9.0 */
'http://updates.html5rocks.com',
/* CORS disabled - Fails in PhantomJS 1.9.0 (and every other version) */
'http://www.google.com',
/* Hack workaround? */
/*
function(httpGet, callback) {
phantom.page.settings = (phantom.page.settings || {});
phantom.page.settings.webSecurityEnabled = false;