Greenfield Python SDK

Disclaimer

The software and related documentation are under active development, all subject to potential future change without notification and not ready for production use. The code and security audit have not been fully completed and not ready for any bug bounty. We advise you to be careful and experiment on the network at your own risk. Stay safe out there.

Parts of the codebase might be broken or not up to date

Introduction

Greenfield Python SDK is a Python package for interacting with the Greenfield API.

It provides an asynchronous client that can be used to interact with the Greenfield blockchain API and the Greenfield storage provider.

Installation

First you will need to generate a shared library to be able to use the object module.

The format is (.so or .dll), depending of the SO that you have.

To generate it go to the data-redundancy-generator-bridge repository and follow the steps in the README.md file.

After that you will need to clone the greenfield-python-sdk. You can also download it instead.

git clone https://github.com/bnb-chain/greenfield-python-sdk
cd greenfield-python-sdk

Now copy the generated shared library output into greenfield_python_sdk/go_library folder.

And finally

pip install .

Quickstart

import asyncio

from greenfield_python_sdk.config import NetworkConfiguration, NetworkTestnet, KeyManager
from greenfield_python_sdk.greenfield_client import GreenfieldClient

async def main():
    network_configuration = NetworkConfiguration(**NetworkTestnet().model_dump())
    key_manager = KeyManager(private_key="key")
    
    async with GreenfieldClient(network_configuration=network_configuration, key_manager=key_manager) as client:
        await client.async_init()

        # Get the account information
        account = await client.account.get_account(address=key_manager.address)

if __name__ == "__main__":
    asyncio.run(main())

Features

• Protobuf support
• Asynchronous Greenfield blockchain API client
• Asynchronous Greenfield storage provider API client
• Asynchronous Greenfield mixed client

Modules

• Account
• Basic
• Challenge
• CrossChain
• Distribution
• Feegrant
• Group
• Object
• Payment
• Proposal
• Storage Provider
• Validator (Limited functionality)

Prerequisites

To use the Greenfield Python SDK, you need to have the following:

• Python 3.9 or later
• Please include the generated shared library (.so or .dll) from the data-redundancy-generator-bridge repository into the greenfield_python_sdk/go_library folder. These files are necessary for adding an object to a storage provider.

Testing

To run the tests, use the following command:

make test-unit
make test-e2e

If you want to create transactions and upload objects as part of the tests, you will need to export a private_key with funds as an environment variable:

export PRIVATE_KEY=...

make test-e2e-complete

You can also test the creation of validators by using a local greenfield node.

export host=http://localhost
export port=26750
export chain_id=9000

make test-e2e-local

Development

To use the library you need to install its dependencies. For that, we recomend to use poetry.

poetry install

or if you have make installed

make install

Building protofiles

To be able to build the protofiles, you need to install the following:

• Install buf: Buf installation link
• Install betterproto: pip install betterproto or with poetry add betterproto

And then run the following command:

make build

Notes

In the generated proto code, you will find the following:

• QueryStub is a service stub for handling query requests. In general, queries are read-only operations that fetch data from the blockchain without changing the state. For example, you might use a query to get the current state of a particular account, retrieve data from a smart contract, or fetch the parameters of a module.

• MsgStub is a service stub for handling message requests. Messages, on the other hand, are used to perform state-changing operations, such as sending tokens from one account to another, interacting with a smart contract, or updating the parameters of a module. These operations typically involve transactions that need to be signed and submitted to the network.

Basically GET and POST requests.

In reallity, we use the Tendermint RPC endpoint instead of using GRPC.

Updating Greenfield version

To update the Greenfield version, you need to update the proto files by importing them from the Greenfield and the greenfield-cosmos-sdk repositories.

https://github.com/bnb-chain/greenfield/tree/master/proto (greenfield folder)

https://github.com/bnb-chain/greenfield-cosmos-sdk/tree/master/proto (amino, cosmos and tendermint folders)

Move those into the proto folder and then run the following command:

make build

And finally, update the greenfield_python_sdk/config.py file with the new Greenfield version. GREENFIELD_VERSION

Reference

• Greenfield: the greenfield blockchain

• Greenfield-Cosmos-SDK: the cosmos sdk forked by Greenfield

• Greenfield-Contract: the cross chain contract for Greenfield that deployed on BSC network.

• Greenfield-Tendermint: the consensus layer of Greenfield blockchain.

• Greenfield-Storage-Provider: the storage service infrastructures provided by either organizations or individuals.

• Greenfield-Relayer: the service that relay cross chain package to both chains.

• Greenfield-Cmd: the most powerful command line to interact with Greenfield system.

• Awesome Cosmos: Collection of Cosmos related resources which also fits Greenfield.