Could Python Take Care of Coins in Your Crypto Wallet?

How to talk to a computer terminal, asking python to sent different crypto coins in our wallet?

Wallet

A crypto wallet is created using python in the file: wallet.py and Jupyter notebook version of wallet.py.

Get BTC testcoins and transaction details on Bitcoin Testnet

Transaction Confirmation on BTC testcoin

Ethereum Transaction Confirmation on Running Python in a Terminal Window Interactively

To run wallet.py:

• Open a terminal window on the wallet folder

code .

• Access functions in wallet.py interactively, run on the terminal window:

from wallet import * 

Three accounts each for BTCTEST and ETH

• Run the priv_key_to_account function to connect to account information via Web3 on localhost:8545

Information on Accounts and Keys in Python Notebook

• Create and send transactions via create_tx and send_tx functions

Transaction View on Python Notebook

• Outputs produced by wallet.py in the terminal include:

  • Private keys and addresses for BTCTEST and ETH coins
  • transaction details on create_tx(BTCTEST, btc_0, btc_1.address, 0.0001) in a dictionary

Terminal View of details on Accounts and BTCTEST coin transactions

"txid":"d742d8a9c7fe5b8afc5f2a1c862568bb511a61760eb03175f422c0b096722bf2"

Terminal view of signed transaction on BTCTEST coin

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Trouble-shooting Stage on Ethereum Transactions

Terminal Window:

First Attempt:

Need to set up local testnet using ./puppeth and ./geth

• Derived information on the first couple of ethereum accounts
  • key for first ethereum account to send coins, eth_0
  • address for the second ethereum account to receive coins, eth_1.address

>>> # Initiate a transaction of 0.01 ethereum on testnet
>>> create_tx(ETH, eth_0, eth_1.address, 0.01)

Second Attempt:

>>> create_tx(ETH, '0xf0a03ce2448ac74a409a0d0f837fb993774e1aa700906d854cefd0e3150ff35e', '0xBf2CEa365Fa098bBABDd11b0ecbD9462595612e5', 0.01)

Third Attempt:

>>> create_tx(ETH, priv_key_to_account(ETH,'0xf0a03ce2448ac74a409a0d0f837fb993774e1aa700906d854cefd0e3150ff35e'), priv_key_to_account(ETH,'0x202bcf2d6ee314ca4593a0edc6f39d19a27c2d4b503c26c3d1637d2338de014c').address, 0.01)

Note: Error messages on all three attempts.

Ethereum Testcoins

Kovan

Ropsten

1 ETH from Ropsten

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Previously, it was in trouble-shooting stage. A bitcoin transaction is generated via this "get_balance" notebook file.

Screenshots of the transaction confirmation is provided here:

BTCTEST transaction

BTCTEST transaction confirmation

BTCTEST transaction on testnet3

For crypto transaction on localhost http://127.0.0.1:8545

Ethereum transaction confirmation

Mining is initiated on ethereum proof-of-authority testnet called txs. It is placed under zbank node in MyCrypto Wallet. Please see details below.

Mining

View in MyCrypto Wallet

Wallet Folder Structure

In Mac Terminal

• Create a wallet by mkdir wallet
• touch wallet.py to generate a python file for crypto transaction functions
• Install hd-wallet-derive by typing

ln -s hd-wallet-derive/hd-wallet-derive.php

Create files in wallet folder

• Set up environment requirements in a file by

touch requirements.txt

Nano environment

• Set up constants.py file for BTCTEST, ETH and BTC by typing

nano constants.py

Nano environment

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Further exploration should there be more time

• Trouble shooting on ethereum transactions

• Add support for BTC.

• Add support for LTC using the sister library, lit.

• Add a function to track transaction status by txid.

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Files

Wallet

Images

References

• CU Gitlab Repository
• https://github.com/rhahn28/cryptowallet
• https://web3py.readthedocs.io/en/latest/overview.html#Web3.toHex
• https://web3py.readthedocs.io/en/latest/web3.eth.account.html#web3.account.Account.signTransaction
• https://live.blockcypher.com/btc-testnet
• https://github.com/blockterms/lit
• https://coinfaucet.eu/en/btc-testnet/
• https://iancoleman.io/bip39/#english
• https://tbtc.bitaps.com
• https://faucet.ropsten.be/
• https://tbtc.bitaps.com/
• https://web3js.readthedocs.io/en/v1.2.0/web3-utils.html#sha3
• https://ethereum.stackexchange.com/questions/23058/how-to-convert-string-to-bytes32-in-web3js