Solidity with python

A simple example to show how to connect python with blockchain smart contracts.

Prerequisites

• node and npm

• Truffle framework

• Infura: Account and Key to access to a blockchain's node.

• Alchemy: Alternative to infura.

• Python and pip

Installation

1. Clone this repository with git

2. Install nodeJs, npm and python

3. Create an Infura or Alchemy Accounts

4. Install truffle framework (npm install -g truffle)

5. Install python dependencies (pip install web3)

6. Install dependencies (npm i)

7. Compile and migrate contracts

truffle develop

After truffle console start:

compile
migrate

Those steps will create the smart contracts binaries inside the ./compiled/contracts folder. You could change that in trufle-config.js.

Testing

In this repo, only we could create the smart contracts binaries and run tests over them. Inside truffle console (truffle develop):

truffle develop
test

Deploy to testnet

To deploy to test network.

# replace <NET> with desire network: rinkeby, goerli, mainnet
truffle migrate --reset --network <NET>

Run example in python

python3 example.py  -r <Provider> -e <providerKeyEth> -p <providerKeyPolygon> -a <addressAcount> -k <addressAccountKey> -n <networkToUse>

# Provider: INFURA or ALCHEMY
# Provider Key Eth: Your Key (in Infura is your projectId)
# Provider Key Polygon: Your Key
# Address Account: An Address to use with contract
# Address Key: Key from Address Account
# Network To Use: RINKEBy or POLYGON (if you need other network, you have yo change example code in example.py)

Contract Addresses

These are the networks and addresses where contract is deployed:

• Ethereum testnet (rinkeby): 0xb497D1572210AAF11D0C39b8307dC73EAB480cfC
• Polygon testnet (mumbai): 0xf05eD004881fD8B0eeeAed908d53FDdD43525C12

More Details

• Linters and Formatters

• Networks y Faucets