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Sats4Files: Decentralized File Hosting based on Lightning

Sats4Files is a protocol for decentralized file hosting. It allows users to request data from untrusted servers, and upon receiving the encrypted data, they can pay for the decryption key via Lightning. The exchange is atomic, ensuring that the user only receives the data if they pay for it, and the seller only gets paid if they deliver the data. The protocol is an efficient form of verifiable encryption, which is similar to verifiable secret sharing using Shamir's algorithm.

This scheme is simplified and does not fully solve the problem, as discussed in the Limitations section. This writeup intends to spark interest to solve the remaining issues beyond the fixes that we suggest.

Sats4Files Problem

The client wants to buy from the server the file corresponding to a particular file_id.

Here, we assume we have PTLCs on Lightning instead of HTLCs. That means we can buy a discrete logarithm over Li

Psto

This is a no-brainer to get your single-post web page up and running. Just have to have Node and NPM installed, and /bin/sh pointing to Bash shell. Styling is powered by 999.css.

Steps:

Place the below package.json into an empty directory and enter this directory in your command line prompt.
Run npm run scaffold.
Edit domain, title and author in the config section of your package.json. The domain may be either a Surge subdomain or your own (please refer to the Surge docs). If you're going to host your page yourself, you may leave domain empty.

The final result: require() any module on npm in your browser console with browserify

This article is written to explain how the above gif works in the chrome (and other) browser consoles. A quick disclaimer: this whole thing is a huge hack, it shouldn't be used for anything seriously, and there are probably much better ways of accomplishing the same.

Update: There are much better ways of accomplishing the same, and the script has been updated to use a much simpler method pulling directly from browserify-cdn. See this thread for details: mathisonian/requirify#5

inspiration

Proposal for a lightweight, database-less, general purpose, name-based file management app

First draft, Easter Sunday 2014

In line with current trends toward lean and simple software solutions reviving and repurposing long-established standards (open plain text vs proprietary rich text formats; file-based static site generators vs bloated database-driven CMSs), the present proposal inquires into a method (and its application) to device a lightweight, general-purpose solution for small-scale digital asset management.

No database is to be used, there shall be no external dependencies, all information carriers should be self-containing, and everything would be file-based. The software would build on a (yet to be established) convention of file naming, which would store metadata for arbitrary files inside the file name, advancing its portability across platforms.

Put as a — somewhat far-fetched — YC-style one-liner pitch: this proposal is about *

	data ToInt a = ToInt (a -> Int)

	instance Functor ToInt where
	-- note, f :: a -> b; g :: a -> Int, and the todo :: b -> Int
	fmap f (ToInt g) = ToInt (error "todo")

	class Contravariant f where
	contramap :: (b -> a) -> f a -> f b

	instance Contravariant ToInt where

	package main

	import (
	"fmt"
	"golang.org/x/crypto/openpgp"
	"os"
	)

	func main() {
	keyRingReader, err := os.Open("signer-pubkey.asc.txt")

	* {
	font-size: 12pt;
	font-family: monospace;
	font-weight: normal;
	font-style: normal;
	text-decoration: none;
	color: black;
	cursor: default;
	}

	* {
	font-size: 12pt;
	font-family: monospace;
	font-weight: normal;
	font-style: normal;
	text-decoration: none;
	color: black;
	cursor: default;
	}

	emconfigure ./configure --disable-maintainer-mode
	make clean
	env CCFLAGS=-O2 emmake make LDFLAGS=-all-static CCFLAGS=-O2 -j4
	cp jq jq.o
	emcc -O2 jq.o -o jq.js

	#! /usr/local/bin/fish
	if test -n "$HOME" ;
	set -xg NIX_LINK "$HOME/.nix-profile"

	# Set the default profile.
	if not test -L "$NIX_LINK" ;
	echo "creating $NIX_LINK" >&2
	set -l _NIX_DEF_LINK /nix/var/nix/profiles/default
	/nix/store/cdybb3hbbxf6k84c165075y7vkv24vm2-coreutils-8.23/bin/ln -s "$_NIX_DEF_LINK" "$NIX_LINK"
	end