shravan-shandilya

The P2SH script:

OP_HASH160 
0x14 
<hash160 of alice's secret>	
OP_EQUAL 
OP_TOALTSTACK 
OP_HASH160 
0x14 

raineorshine

contract MyContract {
  uint counter = 0;

  function Count() {
    counter++;
  }

  function CallCount() {
    Count();
  }

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

androidfred

java.lang.ClassNotFoundException: javafx.util.Pair happens because javafx.util.Pair and other classes from javafx.util are not included in OpenJDK. Options for resolving:

Switch class

Map.Entry<K, V> from java.util is similar to javafx.util.Pair.

Install java-openjfx

Install java-openjfx through your package manager. (or whatever means you used to install Java on your machine) Note that java-openjfx is compatible with OpenJDK8, not previous versions.

After installing java-openjfx, you may have to add it manually to your IDE SDK classpath. Eg in IntelliJ, you may have to go to Project Structure | SDKs | <select your SDK> | Classpath | + (the Classpath +, not the SDKs +) | and add /usr/lib/jvm/java-8-openjdk/jre/lib/ext/jfxrt.jar (which should be there now that java-openjfx has been installed) | OK

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

shilch

#include "merkle.h"

#include <assert.h>
#include <string.h>
#include <stdio.h>

void merkle_init(merkle_ctx* ctx){
    ctx->size = 0;
    ctx->mutated = false;
}

dymurray

import ecdsa
import ecdsa.ellipticcurve as EC

curve = ecdsa.SECP256k1
x = int('11db93e1dcdb8a016b49840f8c53bc1eb68a382e97b1482ecad7b148a6909a5c', 16)
y = int('b2e0eaddfb84ccf9744464f82e160bfa9b8b64f9d4c03f999b8643f656b412a3', 16)
point = EC.Point(curve.curve, x, y)
pubkey = ecdsa.VerifyingKey.from_public_point(point, curve)

hash1 = 90774958364900180671716888080665726921328827653065727390791155349203800699667

jesstelford

Put links inside codeblocks on GitHub:

<pre>
import { assign, map } from '<a href="https://www.npmjs.com/package/lodash" title="Lodash on npm">lodash</a>';

<a href="https://lodash.com/docs#assign" title="assign documentation">assign</a>({ 'a': 1 }, { 'b': 2 }, { 'c': 3 });
// → { 'a': 1, 'b': 2, 'c': 3 } 
<a href="https://lodash.com/docs#map" title="map documentation">map</a>([1, 2, 3], function(n) { return n * 3; });
// → [3, 6, 9] 

KtorZ

name: Code Style

on:
  pull_request:
    branches: [ "master" ]
  push:
    branches: [ "master" ]
    tags: [ "*.*.*" ]

jobs:

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