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Juraj Bednar jooray

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jooray / opt-add-monerod-listen.custom
Created Nov 10, 2020
A docker-compose fragment for btcpayserver to expose monerod RPC port to localhost. I am running a full node, let's make it accessible to my wallets!
View opt-add-monerod-listen.custom
version: "3"
- ""
View DLC

Proof of concept DLC channels

DLC channels combine the ideas of Discreet Log Contracts and bidirectional payment channels (without the Lightning network) on top of Bitcoin Lightning Network. It is one of the first settlement implementation of Debnk protocol.

We believe that DLC channels can be also implemented on top of Elements/Liquid, but probably without confidential transactions. (TODO: Verify)

Discreet log contracts

Discreet log contracts are simple contracts that use on-chain multisig capability. Let's say that Alice and Bob want to enter an (inverse) perpetual swap contract based on the price of Bitcoin in USD. Alice goes long 1000 USD, Bob goes short 1000 USD. They both post some collateral (let's say 0.05 BTC each). The price of Bitcoin is 8000 USD at the time of the opening of the contract. The contract expires and the funds are distributed based on the price of Bitcoin on Friday noon.

View auth
WlbNxS5zYPMlZD2 luUjoVuqpehn4lu 7GOTkpFbxN8l2iK arNa57hbs0SHERZ
MEgsd7ug647Bxrs 8veqIOcLcoNTCKq 6Xr2MZHgg6NbhWm k2yIIcYZHQ397Ru
TdUBTc5LFCf5oT9 iMZxgjEMKocEulm EeILzZyKntDUlgG 90S1g2SNoR0tuL5
27EIx4aprCwBQgM vBbYtCMq0PJip8a BT1QA21.
dirs=( "/home/web1" "/home/web2" )
# run without "-mtime -3" for the first time, then put into cron
find "${dirs[@]}" -mtime -3 -name \*.png -exec optipng -preserve {} \;
find "${dirs[@]}" -mtime -3 \( -name \*.jpg -or -name \*.jpeg \) -exec jpegoptim {} \;
jooray / # systemd - 2019-12-25_23-29-48.txt
Created Dec 25, 2019
systemd on 4.18.0-80.11.2.el8_0.x86_64 - Homebrew build logs
View # systemd - 2019-12-25_23-29-48.txt
Homebrew build logs for systemd on 4.18.0-80.11.2.el8_0.x86_64
Build date: 2019-12-25 23:29:48
jooray /
Last active Jul 25, 2019 — forked from mmmaly/
Call Google speech recognize
# How to set it up:
# Create a project in Google Cloud admin console
# Install google cloud sdk (you need gcloud and gsutil commands)
# Install ffmpeg and jq
# Run gcloud init, login, answer the questions
# Under the project you created, create a globally unique bucket
# here:
# set the name of the globally unique bucket name prefixed by gs://
# here
jooray / install-lnd
Last active Feb 4, 2022
Install LND neutrino mainnet
View install-lnd
# Check the most recent LND_TAG at
export LND_TAG=1e511be523eb8e97c4e2d9c89a7a263963a3929f
# install lnd
git clone $GOPATH/src/
cd $GOPATH/src/
git checkout $LND_TAG
# enabling mainnet on neutrino is in main branch since 0.8x, only uncomment for tag <0.8
#git fetch mainnet-neutrino && git cherry-pick dbd3ca7be48027d8eda557e3c22268497ecc6b25
jooray / secure-wordpress.conf
Created Jan 23, 2019
Securing wordpress in nginx
View secure-wordpress.conf
location ~ ^/wp-admin/includes/ {
return 403;
location ~ ^/wp-includes/[^/]+\.php$ {
return 403;
location ~ ^/wp-includes/js/tinymce/langs/.+\.php {
return 403;
jooray / export.xml
Created Jan 21, 2019
Export jekyll as RSS, remove newlines in the full text to allow importing in wordpress. Put into pages/export.xml and regenerate your jekyll site
View export.xml
layout: null
{%- capture newline %}
{% endcapture -%}
<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0" xmlns:atom="">
<title>{{ site.title | xml_escape }}</title>
<description>{{ site.description | xml_escape }}</description>
jooray /
Last active May 6, 2019
vCard photo extractor
# originally from
# changes:
# - made to work with macOS's base64 (uses -D not -d)
# - does not convert to fixed resolution
# - uses identify to remove invalid images
# - handles special characters better