Tony M.Jenkins amarjen
mutatrum
/ getbitcoinpdf.sh
Created
January 21, 2021 16:15
Get bitcoin.pdf from the bitcoin blockchain in one line
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| bitcoin-cli getrawtransaction 54e48e5f5c656b26c3bca14a8c95aa583d07ebe84dde3b7dd4a78f4e4186e713 | sed 's/0100000000000000/\n/g' | tail -n +2 | cut -c7-136,139-268,271-400 | tr -d '\n' | cut -c17-368600 | xxd -p -r > bitcoin.pdf |
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| from PIL import Image, ImageFont, ImageDraw | |
| from collections import namedtuple | |
| def position_tuple(*args): | |
| Position = namedtuple('Position', ['top', 'right', 'bottom', 'left']) | |
| if len(args) == 0: | |
| return Position(0, 0, 0, 0) | |
| elif len(args) == 1: | |
| return Position(args[0], args[0], args[0], args[0]) |
nlitsme
/ curve_example.py
Last active
January 19, 2025 10:14
example of bitcoin curve calculations in python
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| from __future__ import print_function, division | |
| """ | |
| Example of how calculations on the secp256k1 curve work. | |
| secp256k1 is the name of the elliptic curve used by bitcoin | |
| see http://bitcoin.stackexchange.com/questions/25382 | |
| """ | |
| ## the prime modules used in the elliptic curve coordinate calculations | |
| p = 2**256 - 2**32 - 977 |