py-cobra

---

A fast, flexible and simple development environment framework for Ethereum smart contract, testing and deployment on Ethereum virtual machine(EVM).

With cobra you can get built-in smart contract compilation, linking, deployment, binary management, automated contract testing with Unittest and PyTest frameworks, scriptable deployment & migrations framework and network management for deploying to many public & private networks like INFURA or Ganache CLI.

Dependency

This library requires the solc executable to be present.

Only versions >=0.4.2 are supported and tested though this library may work with other versions.

• solc: Ethereum solidity compiler.
• ganache-cli: A command-line version of Ethereum blockchain server.
• pip: To install packages from the Python Package Index and other indexes.
• python3: version 3.6 or greater.

Installation

PIP to install cobra globally. For Linux sudo may be required.

$ pip install py-cobra

Development

We welcome pull requests. To get started, just fork this repo, clone it locally, and run:

$ pip install -e . -r requirements.txt

Quick Usage

Initialize project structure

A default set of contract and tests, run the following command:

$ cobra init

Get help:

$ cobra --help

From there, you can run cobra compile, cobra deploy/migrate and cobra test --unittest/--pytest to compile your contracts, deploy those contracts to the network, and run their associated unit tests.

advanced cobra.yaml

compile:
  solidity_path: "./contracts" # global
  artifact_path: "./build/contracts"
  contracts: [
    contract: {
        solidity: "Contract.sol",
        solidity_path: "./contracts/libs", # detail
        import_remappings: [
          "=/path/folder/contracts/"
       ],
        allow_paths: [
          "/path/folder/contracts/"
        ]
    }
  ]

deploy:
  artifact_path: "./build/contracts/"
  contracts: [
    contract: {
        artifact: "Contract.json",
        links: ["Contract.json"]
    }
  ]

test:
  artifact_path: "./build/contracts/"
  test_paths: ["./tests"]
  contracts: [
    contract: {
        artifact: "Contract.json",
        links: ["Contract.json"]
    }
  ]

network:
  development: {
    url: "https://ropsten.infura.io/...",
    host: "localhost",
    port: 8545,
    hdwallet: {
        mnemonic: "decide adjust legend nation type same task aim rigid lucky guilt close", # or
        seed: "decide adjust legend nation type same task aim rigid lucky guilt close",
        password: "meherett",
        private: "5f8935bb3b61b312ba1114cbf6f1ea30102383f2b043a1b213aa482132d25049",
        gas: 3000000,
        gas_price: 1000000
    },
    protocol: "HTTP", # HTTP, HTTPS, WS(WebSocket) and ICP
    account: {
      address: "0x6a373a75c388ac2d160f1d2b6d9ada34f29831cd",
      gas: 3000000,
      gas_price: 1000000
    }
  }

Testing

Tests are still under development.

You can run the tests with:

$ pytest tests

Or use tox to run the complete suite against the full set of build targets, or pytest to run specific tests against a specific version of Python.

Meta

Meheret Tesfaye – @meherett – [e-mail]

Distributed under the MIT license. See LICENSE for more information.

https://github.com/meherett

License

This project is licensed under the MIT License - see the LICENSE file for details