gavinandresen

Motivation

This gist tries to come up with a back-of-the-envelope estimate for how much it costs a miner to create larger, rather than smaller, blocks. An economically rational miner will only include transactions with enough fees to cover the cost to the miner of processing the transaction.

I hope this analysis helps solo miners and mining pool operators to reason about their transaction fee policies, and helps them estimate their 'charity cost' if they decide to include fee-free transactions in the blocks they create to promote more use of Bitcoin.

Uncertain numbers in this document are rounded to one digit of precision; this is meant to be an order-of-magnitude estimate; when I say that 100K of free transactions costs about $1, you should assume that the real number might be anywhere between 10 cents and 10 dollars.

Executive summary

gitaarik

Git Submodules basic explanation

Why submodules?

In Git you can add a submodule to a repository. This is basically a repository embedded in your main repository. This can be very useful. A couple of usecases of submodules:

• Separate big codebases into multiple repositories.

gavinandresen

O(1) Block Propagation

The problem

Bitcoin miners want their newly-found blocks to propagate across the network as quickly as possible, because every millisecond of delay increases the chances that another block, found at about the same time, wins the "block race."

jedi4ever

Some notes on remote debugging mac builds on Travisci.  It's hard to tell when something hangs what the cause it. Trial and error via commits is tedious. And on Mac , sometimes it's the gui asking for input. So I worked my around to get the access I needed for faster debugging a build.

#################################################
# Enable remote ssh access to travisci build for debugging
#################################################
# Add a key so we can login to travisci vm
- cat ssh/travisci.pub >> ~/.ssh/authorized_keys
- chmod 600 ssh/travisci
  
# Install netcat

rbf

# You can inspect the release by `tag` before to get the URL of the first asset.
# API_DOC: https://developer.github.com/v3/repos/releases/#get-a-release-by-tag-name
# The you can download the release asset file (not the API object) by including the header 'Accept: application/octet-stream'
# NOTE: When downloading the binary file, don't forget to specify the name of the downloaded file (with -o <filename>).
#       Otherwise the binary will be streamed into the terminal, doing weird unexpected things.
# API_DOC: https://developer.github.com/v3/repos/releases/#get-a-single-release-asset
#
# Everything put together gives that script:
GITHUB_OWNER=twbs
GITHUB_REPO=bootstrap

artjomb

Pairings can be used for all kinds of advanced cryptographic schemes such as Encryption (Identity-based, Attribute-based, Predicate-based, etc.), Signatures, Zero-Knowledge Proofs, etc. It is in no particular order.

PBC

Provides multiple types of Elliptic Curve groups with appropriate pairings on top of them. Code repository resides here.

License: LGPL
Language: C
Thesis: On the Implementation of Pairing-Based Cryptography by Ben Lynn (2007)

soupi

{-# LANGUAGE LambdaCase #-}

-- http://gilmi.xyz/post/2016/10/14/lisp-to-js

module Main where

import Control.Applicative (Alternative, empty, (<|>))
import Control.Arrow (first, (***))
import Data.Bool (bool)
import Data.List (intercalate)

phadej

{-# LANGUAGE CPP #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE FlexibleInstances, FlexibleContexts #-}
{-# LANGUAGE DataKinds, GADTs, KindSignatures, TypeOperators, UndecidableInstances #-}

#if __GLASGOW_HASKELL__ < 708
#error "requires GHC 7.10 or newer"
#endif
module Main (main) where

raineorshine

contract MyContract {
  uint counter = 0;

  function Count() {
    counter++;
  }

  function CallCount() {
    Count();
  }

ross-p

/**
 * Ethereum Account Scanner
 *
 * To run this, you need your own geth node, accepting RPC
 * connections on a port you can access.
 *
 * Install pre-requisites:
 *     sudo npm install -g web3
 *
 * Usage: