cosmospy
Version 6.0.0
Tools for Cosmos wallet management and offline transaction signing
Table of Contents generated with mdformat-toc
Installing
Installing from PyPI repository (https://pypi.org/project/cosmospy):
pip install cosmospyUsage
Generating a wallet
from cosmospy import generate_wallet
wallet = generate_wallet()The value assigned to wallet will be a dictionary just like:
{
"seed": "arch skill acquire abuse frown reject front second album pizza hill slogan guess random wonder benefit industry custom green ill moral daring glow elevator",
"derivation_path": "m/44'/118'/0'/0/0",
"private_key": b"\xbb\xec^\xf6\xdcg\xe6\xb5\x89\xed\x8cG\x05\x03\xdf0:\xc9\x8b \x85\x8a\x14\x12\xd7\xa6a\x01\xcd\xf8\x88\x93",
"public_key": b"\x03h\x1d\xae\xa7\x9eO\x8e\xc5\xff\xa3sAw\xe6\xdd\xc9\xb8b\x06\x0eo\xc5a%z\xe3\xff\x1e\xd2\x8e5\xe7",
"address": "cosmos1uuhna3psjqfxnw4msrfzsr0g08yuyfxeht0qfh",
}Converter functions
Mnemonic seed to private key
from cosmospy import BIP32DerivationError, seed_to_privkey
seed = (
"teach there dream chase fatigue abandon lava super senior artefact close upgrade"
)
try:
privkey = seed_to_privkey(seed, path="m/44'/118'/0'/0/0")
except BIP32DerivationError:
print("No valid private key in this derivation path!")Private key to public key
from cosmospy import privkey_to_pubkey
privkey = bytes.fromhex(
"6dcd05d7ac71e09d3cf7da666709ebd59362486ff9e99db0e8bc663570515afa"
)
pubkey = privkey_to_pubkey(privkey)Public key to address
from cosmospy import pubkey_to_address
pubkey = bytes.fromhex(
"03e8005aad74da5a053602f86e3151d4f3214937863a11299c960c28d3609c4775"
)
addr = pubkey_to_address(pubkey)Private key to address
from cosmospy import privkey_to_address
privkey = bytes.fromhex(
"6dcd05d7ac71e09d3cf7da666709ebd59362486ff9e99db0e8bc663570515afa"
)
addr = privkey_to_address(privkey)Signing transactions
from cosmospy import Transaction
tx = Transaction(
privkey=bytes.fromhex(
"26d167d549a4b2b66f766b0d3f2bdbe1cd92708818c338ff453abde316a2bd59"
),
account_num=11335,
sequence=0,
fee=1000,
gas=70000,
memo="",
chain_id="cosmoshub-4",
sync_mode="sync",
)
tx.add_transfer(
recipient="cosmos103l758ps7403sd9c0y8j6hrfw4xyl70j4mmwkf", amount=387000
)
tx.add_transfer(recipient="cosmos1lzumfk6xvwf9k9rk72mqtztv867xyem393um48", amount=123)
pushable_tx = tx.get_pushable()
# Optionally submit the transaction using your preferred method.
# This example uses the httpx library.
import httpx
api_base_url = "https://node.atomscan.com"
httpx.post(api_base_url + "/txs", data=pushable_tx)One or more token transfers can be added to a transaction by calling the add_transfer method.
When the transaction is fully prepared, calling get_pushable will return a signed transaction in the form of a JSON string.
This can be used as request body when calling the POST /txs endpoint of the Cosmos REST API.