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I have a geth node that is connected to a private network on my computer that uses port: 8545. Hence, I have a smart contract that is tested using Brownie on the ganache-cli network.

Brownie is a Python framework for Ethereum smart contract testing, interaction and deployment.


=> I want to deploy a smart contract using Brownie, how can I do it?

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Connecting to the Network

First, make sure that Brownie is able to connect to your private network. You will have to add a custom network to Brownie's network settings. Here is an example command that declares a live network with the name "private" at 127.0.0.1, port 8545:

brownie networks add live private host=https://127.0.0.1:8545 chainid=1337

You can use brownie networks --help for more information on possible settings.

Deploying your Contract

The simplest way to deploy is via a deployment script. Here is an example deployment script for a basic ERC20, taken from the documentation:

from brownie import *

def main():
    accounts[0].deploy(Token, "Test Token", "TEST", 18, "1000 ether")

Save your deployment script within the scripts/ folder of your project.

To run the script on your local network, use the --network flag. For example, to run a deployment script named deployment.py on a network named "private":

brownie run deployment --network private

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