vietlq

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vietlq

# Edit this for your own project dependencies
OPAM_DEPENDS="ocamlfind ounit re"

case "$OCAML_VERSION,$OPAM_VERSION" in
3.12.1,1.0.0) ppa=avsm/ocaml312+opam10 ;;
3.12.1,1.1.0) ppa=avsm/ocaml312+opam11 ;;
4.00.1,1.0.0) ppa=avsm/ocaml40+opam10 ;;
4.00.1,1.1.0) ppa=avsm/ocaml40+opam11 ;;
4.01.0,1.0.0) ppa=avsm/ocaml41+opam10 ;;
4.01.0,1.1.0) ppa=avsm/ocaml41+opam11 ;;

vietlq

Playing with js_of_ocaml

A few years ago, while picking up basic OCaml, I found this site by Andrew Ray: https://andrewray.github.io/iocamljs/full402.html . This page has in-browser OCaml notebook. I was trying to modernise it and compile with OCaml 4.06.1. The vital part of the page is an ability to evaluate OCaml at run time in Javascript inside your browser. This is done by Js_of_ocaml. Learn basics of Js_of_ocaml in this post.

Hello World

Let’s do tradition “hello world” exercise, create a new file hello.ml:

let () =  

vietlq

type void

(* Core pipe type *)

type ('a, 'b, 'r) pipe =
  | Yield of ('b  * (unit -> ('a, 'b, 'r) pipe))
  | Await of ('a -> ('a, 'b, 'r) pipe)
  | Ready of 'r

tnakagawa

Threshold Signatures

This text is a procedure for t-of-k threshold signatures.

The symbols and functions used are defined in the following URL.

https://github.com/sipa/bips/blob/bip-schnorr/bip-schnorr.mediawiki

Introduction

tnakagawa

Multisignature

This sentence is a procedure for n-of-n Multisignatures to the following URL.

The symbols and functions used are defined in the following URL.

https://github.com/sipa/bips/blob/bip-schnorr/bip-schnorr.mediawiki

Introduction

vietlq

Free eye check for my fellow C++03 devs, what's wrong with this:

for (size_t idx = myVector.size() - 1; idx >= 0; ++idx)
{
    doSomething(myVector[idx]);     
}

for (size_t idx = myVector.size() - 1; idx >= 0; --idx)
{

vietlq

module Peano = struct
  type z = Zero
  type 'a s = Succ

  type 'a t =
    | Z : z t
    | S : 'a t -> 'a s t
  and zero = z t

  let zero : z t = Z

dinosaure

module Peano = struct
  type z = Zero
  type 'a s = Succ

  type 'a t =
    | Z : z t
    | S : 'a t -> 'a s t
  and zero = z t

  let zero : z t = Z

vietlq

# Raw transaction API example work-through
# Send coins to a 2-of-3 multisig, then spend them.
#
# For this example, I'm using these three keypairs (public/private)
# 0491bba2510912a5bd37da1fb5b1673010e43d2c6d812c514e91bfa9f2eb129e1c183329db55bd868e209aac2fbc02cb33d98fe74bf23f0c235d6126b1d8334f86 / 5JaTXbAUmfPYZFRwrYaALK48fN6sFJp4rHqq2QSXs8ucfpE4yQU
# 04865c40293a680cb9c020e7b1e106d8c1916d3cef99aa431a56d253e69256dac09ef122b1a986818a7cb624532f062c1d1f8722084861c5c3291ccffef4ec6874 / 5Jb7fCeh1Wtm4yBBg3q3XbT6B525i17kVhy3vMC9AqfR6FH2qGk
# 048d2455d2403e08708fc1f556002f1b6cd83f992d085097f9974ab08a28838f07896fbab08f39495e15fa6fad6edbfb1e754e35fa1c7844c41f322a1863d46213 / 5JFjmGo5Fww9p8gvx48qBYDJNAzR9pmH5S389axMtDyPT8ddqmw

# First: combine the three keys into a multisig address:
./bitcoind createmultisig 2 '["0491bba2510912a5bd37da1fb5b1673010e43d2c6d812c514e91bfa9f2eb129e1c183329db55bd868e209aac2fbc02cb33d98fe74bf23f0c235d6126b1d8334f86","04865c40293a680cb9c020e7b1e106d8c1916d3cef99aa431a56d253e69256dac09ef122b1a9