luisschwab

#!/usr/bin/python3

'''
this script takes in an PSBT and adds an 
OP_RETURN output (OP_RETURN OP_PUSHDATA1 <len(message)> <message>)
with the chosen message payload

usage:
  interactive:
    ./op-return-builder.py

luisschwab

'''
A simple example illustrating  
message signing and signature
verification using secp256k1
'''

import coincurve
import hashlib

# order of the finite field in secp256k1

luisschwab

#!/usr/bin/python3

'''
usage:
  trusted: 
    ./nostr-keygen.py (will generate a private key)
  trustless:
    ./nostr-keygen.py <32 byte hex privkey> (will derive the pubkey)

    ./nostr-keygen.py "$(openssl rand -hex 32)"