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https://github.com/hukkin/cosmospy

Python tools for Cosmos wallet management and offline transaction signing
https://github.com/hukkin/cosmospy

address blockchain cosmos cosmos-sdk cryptocurrency python tendermint transaction

Last synced: about 2 months ago
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Python tools for Cosmos wallet management and offline transaction signing

Host: GitHub
URL: https://github.com/hukkin/cosmospy
Owner: hukkin
License: mit
Created: 2019-06-06T18:13:13.000Z (over 5 years ago)
Default Branch: master
Last Pushed: 2024-04-29T17:46:48.000Z (5 months ago)
Last Synced: 2024-05-22T18:22:17.898Z (4 months ago)
Topics: address, blockchain, cosmos, cosmos-sdk, cryptocurrency, python, tendermint, transaction
Language: Python
Homepage:
Size: 205 KB
Stars: 88
Watchers: 6
Forks: 59
Open Issues: 7
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- License: LICENSE

Awesome Lists containing this project

README

        [![Build Status](https://github.com/hukkin/cosmospy/workflows/Tests/badge.svg?branch=master)](https://github.com/hukkin/cosmospy/actions?query=workflow%3ATests+branch%3Amaster+event%3Apush)

[![codecov.io](https://codecov.io/gh/hukkin/cosmospy/branch/master/graph/badge.svg)](https://codecov.io/gh/hukkin/cosmospy)

[![PyPI version](https://img.shields.io/pypi/v/cosmospy)](https://pypi.org/project/cosmospy)

# cosmospy

> Version 6.0.0

> Tools for Cosmos wallet management and offline transaction signing

**Table of Contents**  *generated with [mdformat-toc](https://github.com/hukkin/mdformat-toc)*

- [Installing](#installing)

- [Usage](#usage)

  - [Generating a wallet](#generating-a-wallet)

  - [Converter functions](#converter-functions)

    - [Mnemonic seed to private key](#mnemonic-seed-to-private-key)

    - [Private key to public key](#private-key-to-public-key)

    - [Public key to address](#public-key-to-address)

    - [Private key to address](#private-key-to-address)

  - [Signing transactions](#signing-transactions)

## Installing

Installing from PyPI repository (https://pypi.org/project/cosmospy):

```bash

pip install cosmospy

```

## Usage

### Generating a wallet

```python

from cosmospy import generate_wallet

wallet = generate_wallet()

```

The value assigned to `wallet` will be a dictionary just like:

```python

{

    "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

```python

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

```python

from cosmospy import privkey_to_pubkey

privkey = bytes.fromhex(

    "6dcd05d7ac71e09d3cf7da666709ebd59362486ff9e99db0e8bc663570515afa"

)

pubkey = privkey_to_pubkey(privkey)

```

#### Public key to address

```python

from cosmospy import pubkey_to_address

pubkey = bytes.fromhex(

    "03e8005aad74da5a053602f86e3151d4f3214937863a11299c960c28d3609c4775"

)

addr = pubkey_to_address(pubkey)

```

#### Private key to address

```python

from cosmospy import privkey_to_address

privkey = bytes.fromhex(

    "6dcd05d7ac71e09d3cf7da666709ebd59362486ff9e99db0e8bc663570515afa"

)

addr = privkey_to_address(privkey)

```

### Signing transactions

```python

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](https://cosmos.network/rpc).