et4te

[%%version 0.3]

type storage = 
  { version : string;
    secret_hash : bytes;
    issuer : address;
    issuer_hash : key_hash;
    recipient_hash : key_hash;
    timeout : timestamp;
  } 

dakk

Tezos baking howto

This howto is valid for Betanet on Ubuntu or Debian

Setup

Prereq

You have to install some dependencies. In debian / ubuntu run:

RabaDabaDoba

/*
 * This is free and unencumbered software released into the public domain.
 *
 * For more information, please refer to <https://unlicense.org>
 */

//Regular text
#define BLK "\e[0;30m"
#define RED "\e[0;31m"
#define GRN "\e[0;32m"

wjmelements

pragma solidity^0.4.19;
// like a less-liquid GasToken
contract Sponsored {
    uint256[] wastedSpace;
    function sponsor() external {
        uint256 len = wastedSpace.length;
        wastedSpace.length = len + 5;
        wastedSpace[len] = 1;
        wastedSpace[len+1] = 1;
        wastedSpace[len+2] = 1;

steveh

PostgreSQL Type	PostgreSQL Size	Description	Range	Diesel Type	Rust Type
Nullable Types		nullable		Nullable``

ZenGround0

package main

import (
	"io"
	"mime/multipart"
	"net/http"
	"net/url"
	"os"
	"fmt"
)

ZenGround0

package main

import (
	"net/http"
	"net/url"
	"os"
	"fmt"
)

bloc97

Two Fast Methods of Generating True Random Numbers on the Arduino

Arduino true random number generator

B. Peng

December 2017

Abstract

The AVR series microcontrollers are a collection of cheap and versatile chips that are used in many applications ranging from hobbist projects to commercial infrastructure. One major problem for some hobbists is the lack of secure random number generation on the Arduino platform. The included pseudo-random number generator (PRNG) is very easy to defeat and is useless for any crypto-related uses. One recommendation from the Arduino Reference Manual is to use atmospheric noise from the chip's analog sensor pins as seed data^[6].
Unfortunately this method is extremely weak and should not be used to emulate a true random number generator (TRNG). Existing methods such as using the internal timer drift or using a dedicated generator are either too slow, requires extensive external hardware or modifications to the microcontroller's internal mech

yurishkuro

• What do Etcd, Consul, and Zookeeper do?
  • Service Registration:
    • Host, port number, and sometimes authentication credentials, protocols, versions numbers, and/or environment details.
  • Service Discovery:
    • Ability for client application to query the central registry to learn of service location.
  • Consistent and durable general-purpose K/V store across distributed system.
    • Some solutions support this better than others.
    • Based on Paxos or some derivative (i.e. Raft) algorithm to quickly converge to a consistent state.
• Centralized locking can be based on this K/V store.

jahil

# FreeBSD 10.2 -- /etc/sysctl.conf  version 0.47
# https://calomel.org/freebsd_network_tuning.html
#
# low latency is important so we highly recommend that you disable hyper
# threading on Intel CPUs as it has an unpredictable affect on latency, cpu
# cache misses and load.
#
# These settings are specifically tuned for a "low" latency FIOS (300/300) and
# gigabit LAN connections. If you have 10gig or 40gig you will need to increase
# the network buffers as proposed. "man tuning" for more information.