benyarb

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gubatron

DHT Walkthrough Notes

I've put together these notes as I read about DHT's in depth and then learned how the libtorrent implementation based on the Kademlia paper actually works.

What problem does this solve?

400,000,000,000 (400 billion stars), that's a 4 followed by 11 zeros. The number of atoms in the universe is estimated to be around 10^82. A DHT with keys of 160 bits, can have 2^160 possible numbers, which is around 10^48

mafintosh

var hypercore = require('hypercore')
var ram = require('random-access-memory')

var feed = hypercore(ram)

feed.append('hello world')

mafintosh

start()

async function start () {
  const promises = [
    new Promise((resolve, reject) => setTimeout(reject, 1000)),
    Promise.reject(),
    Promise.reject()
  ]

  for (const a of promises) {

RobinLinus

zkCoins

zkCoins is a novel blockchain design with strong privacy and scalability properties. It combines client-side validation with a zero-knowledge proof system. The chain is reduced to a minimum base layer to prevent double spending. Most of the verification complexity is moved off-chain and communicated directly between the individual sender and recipient of a transaction. There are very few global consensus rules, which makes block validation simple. Not even a global UTXO set is required.

In contrast to zk-rollups there is no data availability problem, and no sequencer is required to coordinate a global proof aggregation. The protocol can be implemented as an additional layer contained in Bitcoin's blockchain (similar to RGB[^5] or Taro[^6]) or as a standalone sidechain.

The throughput scales to hundreds of transactions per second without sacrificing decentralization.

Design Principles

The core design principle is to *"use the chain for what the chain is good for, which is an immutable order

rklaehn

use futures::StreamExt;

struct Response {
    inner: flume::Receiver<u64>,
    total: u64,
    sum: u64,
}

impl Response {