arik-so

Unifying FROST and MuSig

There might be a secure scheme that non-interactively generates a n-of-n FROST key and from there you can interactively turn it into a t-of-n by issuing new shares (i.e. enrolment). I don't really know if this is a useful contribution even if it works. There might be some utility in not having multiple schemes but rather a one size fits all approach.

Idea

MuSig takes a "multiset" of n public keys and outputs a single aggregated key which takes n-of-n secret keys to sign. Set z_i = H(X_1,.. X_i, .. X_n, X_i) for i = 1,2, .. n.

Hirrolot

trait Interp {
    type Repr<T>;

    fn lit(i: i32) -> Self::Repr<i32>;
    fn add(a: Self::Repr<i32>, b: Self::Repr<i32>) -> Self::Repr<i32>;
}

struct Eval;

impl Interp for Eval {

roberth

/*
  minimod: A stripped down module system

  TODO Comparison:
    - [ ] Come up with a benchmark "logic" using plain old functions and let bindings
    - [ ] Write the benchmark for the module system
    - [ ] Write the benchmark for POP?
    - [ ] Qualitative comparison of extensibility in the context of composable
          Nixpkgs packaging logic
  TODO Fine-tuning:

Kixunil

Reusable taproot addresses

Abstract

This document proposes a new scheme to avoid address reuse while retaining some of the convenience of address reuse, keeping recoverability purely from Bitcoin time chain and avoiding visible fingerprint. The scheme has negligible average overhead.

Motivation

dwoffinden

# Copyright 2020 Google LLC.
# SPDX-License-Identifier: Apache-2.0
{ config, pkgs, ... }:
let
  # https://github.com/StevenBlack/hosts/issues/451
  # https://github.com/ScriptTiger/Hosts-Conversions
  # https://github.com/ScriptTiger/scripttiger.github.io
  # https://scripttiger.github.io/alts/
  adblockLocalZones = pkgs.stdenv.mkDerivation {
    name = "adblock-rpz";

mschwaig

{ config, pkgs, lib, ... }:

{
  # This sway config is mostly based on https://nixos.wiki/wiki/Sway
  # which integrates sway with systemd in the style described here
  # https://github.com/swaywm/sway/wiki/Systemd-integration
  # and the replies in https://github.com/NixOS/nixpkgs/issues/57602
  # with some individual packages added/removed and using sddm as the display manager.
  #
  # Take care to start the correct target as described by the sway proejct wiki.

lontivero

module WabiSabi where

data GE = GE Integer Integer | Infinity
  deriving Show
 
instance S.Semigroup GE where
  (<>) = (⊕)

instance M.Monoid GE where
  mempty = Infinity

chris-belcher

Design for a CoinSwap Implementation for Massively Improving Bitcoin Privacy and Fungibility

25/5/2020

Abstract

Imagine a future where a user Alice has bitcoins and wants to send them with maximal privacy, so she creates a special kind of transaction. For anyone looking at the blockchain her transaction appears completely normal with her coins seemingly going from address A to address B. But in reality her coins end up in address Z which is entirely unconnected to either A or B.

Now imagine another user, Carol, who isn't too bothered by privacy and sends her bitcoin using a regular wallet which exists today. But because Carol's transaction looks exactly the same as Alice's, anybody analyzing the blockchain must now deal with the possibility that Carol's transaction actually sent her coins to a totally unconnected address. So Carol's privacy is improved even though she didn't change her behaviour, and perhaps had never even heard of this software.

RubenSomsen

Blind Merged Mining with covenants ( sighash_anyprevout / op_ctv )

Update: the content of this gist is also explained in this Spacechains video.

This write-up was also published on bitcoin-dev.

Blind Merged Mining (BMM) is the idea of committing the hash of another blockchain into a unique location on the Bitcoin blockchain, and paying a Bitcoin fee to miners for the privilege of deciding this hash and capturing the fees inside the other blockchain. Since miners don’t have to know what the hash represents and are simply incentivized to choose the highest bidder, it requires no extra validation on their part (“blind”). This idea was originally conceived of by Paul Sztorc, but required a specific soft fork. [0]

In essence, BMM is a mechanism that allows external blockchains (altcoins, tokens) to outsource their mining to the Bitcoin blockchain. Instead of burning electricity with ASICs, th

amitiuttarwar

Reducing noise in the rebroadcast set: 

I think there are two ways these filters reduce the rebroadcast set

1. Caching min fee rate by itself —> mempool is emptying out, blocks are being mined & txn fees are decreasing. Time to rebroadcast, set is calculated & cache is applied.

Time 1: caching job runs, top block computed to include a, b, c
Mempool looks like: j i h g f e d | c b a 

Time 2-4: txns come in