kdmukai

Installing Python 3.7 on Raspbian

As of January 2018, Raspbian does not yet include the latest Python release, Python 3.6. This means we will have to build it ourselves, and here is how to do it. There is also an ansible role attached that automates it all for you.

Install the required build-tools (some might already be installed on your system).

$ sudo apt-get update
$ sudo apt-get install build-essential tk-dev libncurses5-dev libncursesw5-dev libreadline6-dev libdb5.3-dev libgdbm-dev libsqlite3-dev libssl-dev libbz2-dev libexpat1-dev liblzma-dev zlib1g-dev libffi-dev

Keybase proof

I hereby claim:

I am kdmukai on github.
I am keithmukai (https://keybase.io/keithmukai) on keybase.
I have a public key ASDUOmPehgibQKBnA-5CT2A-e-p8sIXkzj4tA38l71FVSwo

To claim this, I am signing this object:

Install Bitcoin Core v22+ bitcoind on a Raspberry Pi

Procedure has changed, starting with v22!

Download binary and verification hashes

wget https://bitcoin.org/bin/bitcoin-core-22.0/bitcoin-22.0-arm-linux-gnueabihf.tar.gz
wget https://bitcoin.org/bin/bitcoin-core-22.0/SHA256SUMS.asc
wget https://bitcoin.org/bin/bitcoin-core-22.0/SHA256SUMS

Install Bitcoin Core v22+ bitcoind on macOS

If you don't have wget installed:

brew install wget

Download binary and verification hashes

wget https://bitcoin.org/bin/bitcoin-core-22.0/bitcoin-22.0-osx64.tar.gz

Single sig change-stealing attack from a compromised coordinator

See the full video walkthrough on twitter.

The CORRECT psbt

Spending uxto from regtest: 3641312fc3e418804f1a0a88098b6bf8e3bdca13afd2f0633ca3166fc8533f17

Signing mnemonic: "smoke chimney announce candy glory tongue refuse fatigue cricket once consider beef treat urge wing deny gym robot tobacco adult problem priority wheat diagram"

	"""
	Usage: python3 bitcoin_diff.py 2017-06-28

	outputs:
	Price on 2017-06-28: $2584.56
	Price on 2020-04-29: $8783.59
	Difference: 239.85%
	"""
	import datetime
	import json

	help('modules')

	# import machine
	# print(f"Initial freq: {int(machine.freq() / 1e6)}MHz")
	# machine.freq(int(240*1e6))
	# print(f"Current freq: {int(machine.freq() / 1e6)}MHz")
	# pin = machine.Pin(13, machine.Pin.OUT)
	# pin.value(1)

	import time

	import os
	from embit import bip39
	from embit.wordlists.bip39 import WORDLIST
	from seedsigner.models.decode_qr import DecodeQR
	from seedsigner.models.encode_qr import EncodeQR
	from seedsigner.models.qr_type import QRType
	from seedsigner.helpers.qr import QR

	seed_bytes = b''

	"""
	dependency: pip install embit
	"""
	from embit import compact
	from embit.psbt import PSBT, OutputScope
	from embit.script import Script

	class OPCODES:
	OP_RETURN = 106
	OP_PUSHDATA1 = 76

	from embit import bip32, bip39, script
	from embit.slip39 import secure_randint
	from embit.wordlists.bip39 import WORDLIST

	for i in range(0, 100):
	mnemonic = []
	for j in range(0, 11):
	# note: `secure_randint` is inclusive of the end of the range
	mnemonic.append(WORDLIST[secure_randint(0, 2047)])
	mnemonic.append(WORDLIST[0])