btctxstore 2.0.0

A simple library to store/retrieve information in bitcoin transactions using OP_RETURN.

A library to read/write data to bitcoin transactions as nulldata outputs.

Installation

pip install btctxstore

storing/retrieving data from nulldata outputs

Store data in bitcoin blockchain in new transaction with nulldata output. Prints txid of transaction with stored data.

from btctxstore import BtcTxStore
api = BtcTxStore()

privatekeys = [privatekey_in_wif_format]
txid = api.storenulldata(hexnulldata, privatekeys)
print(txid)

Read data stored in bitcoin blockchain as nulldata output. Prints stored data in hex format.

from btctxstore import BtcTxStore
api = BtcTxStore()

hexnulldata = api.retrievenulldata(txid)
print(hexnulldata)

sign/verify data (bitcoind compatible)

Signing message with a private key.

# from examples/sign.py
import binascii
from btctxstore import BtcTxStore

data = binascii.hexlify(b"messagetext")
api = BtcTxStore(testnet=True, dryrun=True)
wif = api.createkey() # create new private key
sigsignature = api.signdata(wif, data)
print(signature)

Verify signature with address, signature and data.

# from examples/verify.py
import binascii
from btctxstore import BtcTxStore

address = "mkRqiCnLFFsEH6ezsE1RiMxEjLRXZzWjwe"
signature = "H8wq7z8or7jGGT06ZJ0dC1+wnmRLY/fWnW2SRSRPtypaBAFJAtYhcOl+0jyjujEio91/7eFEW9tuM/WZOusSEGc="
data = binascii.hexlify(b"testmessage")

api = BtcTxStore(testnet=True, dryrun=True)
result = api.verifysignature(address, signature, data)
print(result)