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// From the terminal in the save directory where this script is saved:
// npm i bip39 bip32 @bitcoinerlab/secp256k1
// MNEMONIC="your mnemonic here" node derive-pubkey.cjs

const bip39 = require('bip39')
const BIP32Factory = require('bip32').default
const ecc = require('@bitcoinerlab/secp256k1')

const bip32 = BIP32Factory(ecc)

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// Bitcoin Price Widget using Yadio.io
let widget = new ListWidget();
widget.setPadding(16, 16, 16, 16);
widget.backgroundColor = new Color("#1a1a1a");

let title = widget.addText("₿ Bitcoin Price");
title.font = Font.boldSystemFont(16);
title.textColor = Color.white();
widget.addSpacer(8);

learntheropes

sudo ntpdate -b time.nist.gov

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CREATE EXTENSION citext;
CREATE DOMAIN email AS citext
  CHECK ( value ~ '^[a-zA-Z0-9.!#$%&''*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$' );

learntheropes

$ sudo -u postgres psql
psql (14.1 (Ubuntu 14.1-2.pgdg20.04+1))
Type "help" for help.

postgres=# \password postgres
Enter new password: 
Enter it again: 

learntheropes

# https://askubuntu.com/questions/1198903/can-not-use-swap-file-on-zfs-files-with-holes/1198916#1198916

sudo zfs create -V 8G -b $(getconf PAGESIZE) -o logbias=throughput -o sync=always -o primarycache=metadata -o com.sun:auto-snapshot=false rpool/swap

sudo mkswap -f /dev/zvol/rpool/swap

sudo swapon /dev/zvol/rpool/swap

# Make the swap persistent after reboot
# https://www.digitalocean.com/community/tutorials/how-to-add-swap-space-on-ubuntu-20-04#step-5-making-the-swap-file-permanent

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function isEmpty(value){
  return  value === undefined ||
    value === null ||
    (typeof value === "object" && Object.keys(value).length === 0) ||
    (typeof value === "string" && value.trim().length === 0)
}

module.exports = isEmpty;

learntheropes

user_agent_parsers:
  #### SPECIAL CASES TOP ####

  # CFNetwork Podcast catcher Applications
  - regex: '(ESPN)[%20| ]+Radio/(\d+)\.(\d+)\.(\d+) CFNetwork'
  - regex: '(Antenna)/(\d+) CFNetwork'
    family_replacement: 'AntennaPod'
  - regex: '(TopPodcasts)Pro/(\d+) CFNetwork'
  - regex: '(MusicDownloader)Lite/(\d+)\.(\d+)\.(\d+) CFNetwork'
  - regex: '^(.*)-iPad/(\d+)\.?(\d+)?.?(\d+)?.?(\d+)? CFNetwork'

learntheropes

// work in progress
// you need a bittrex API key and secret with read account option enabled

// I assume that all the keys are in the "keys" spreadsheet. The key is in cell B5 and the secret in cell C5
var sheet = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("keys");
var key = sheet.getRange("B5").getValue()
var secret = sheet.getRange("C5").getValue();
var baseUrl = 'https://bittrex.com/api/v1.1/';
var nonce = Math.floor(new Date().getTime()/1000);

learntheropes

// work in progress

// you need a poloniex API key and secret with trading option enabled
// you can test it with:
// = polo("returnBalances","BTC")
// or
// = polo("returnBalances","all")
// or buy and sell:
// polo("BUY","BTC_LTC", 0.0251, 1) or polo("SELL","BTC_LTC", 0.0251, 1)