Requirements

Python

import sys


python_version = (
    f"{sys.version_info.major}."
    f"{sys.version_info.minor}."
    f"{sys.version_info.micro}"
)
print(f"Python version {python_version}")

Python version 3.8.12

Choose any following methods to install dependcies

poetry (recommend)

poetry install
pip

pip install -r requirements.txt

IPFS CLI

Follow this URL https://docs.ipfs.io/install/command-line/#official-distributions

Import modules

import brownie
from brownie import accounts, project, config, network

# Compile smart contracts
p = project.load('.', name="pynft")
p.load_config()

Connect to chain

import os

print("Available networks")
print(os.popen("brownie networks list").read())

Available networks
Brownie v1.17.0 - Python development framework for Ethereum

The following networks are declared:

Ethereum
�[0;1;30m  ├─�[0;mMainnet (Infura): �[0;32mmainnet�[0;m
�[0;1;30m  ├─�[0;mRopsten (Infura): �[0;32mropsten�[0;m
�[0;1;30m  ├─�[0;mRinkeby (Infura): �[0;32mrinkeby�[0;m
�[0;1;30m  ├─�[0;mGoerli (Infura): �[0;32mgoerli�[0;m
�[0;1;30m  ├─�[0;mKovan (Infura): �[0;32mkovan�[0;m
�[0;1;30m  ├─�[0;mmainnet-fork-2: �[0;32mmainnet-fork-2�[0;m
�[0;1;30m  ├─�[0;mmainnet-fork-3: �[0;32mmainnet-fork-3�[0;m
�[0;1;30m  ├─�[0;mmainnet-fork-4: �[0;32mmainnet-fork-4�[0;m
�[0;1;30m  └─�[0;mmainnet-fork-5: �[0;32mmainnet-fork-5�[0;m

Ethereum Classic
�[0;1;30m  ├─�[0;mMainnet: �[0;32metc�[0;m
�[0;1;30m  └─�[0;mKotti: �[0;32mkotti�[0;m

Arbitrum
�[0;1;30m  └─�[0;mMainnet: �[0;32marbitrum-main�[0;m

Binance Smart Chain
�[0;1;30m  ├─�[0;mTestnet: �[0;32mbsc-test�[0;m
�[0;1;30m  └─�[0;mMainnet: �[0;32mbsc-main�[0;m

Fantom Opera
�[0;1;30m  ├─�[0;mTestnet: �[0;32mftm-test�[0;m
�[0;1;30m  └─�[0;mMainnet: �[0;32mftm-main�[0;m

Harmony
�[0;1;30m  └─�[0;mMainnet (Shard 0): �[0;32mharmony-main�[0;m

Polygon
�[0;1;30m  ├─�[0;mMainnet (Infura): �[0;32mpolygon-main�[0;m
�[0;1;30m  └─�[0;mMumbai Testnet (Infura): �[0;32mpolygon-test�[0;m

XDai
�[0;1;30m  ├─�[0;mMainnet: �[0;32mxdai-main�[0;m
�[0;1;30m  └─�[0;mTestnet: �[0;32mxdai-test�[0;m

Eherium
�[0;1;30m  └─�[0;mganache-local: �[0;32mganache-local�[0;m

Etherium
�[0;1;30m  └─�[0;mganache-local-2: �[0;32mganache-local-2�[0;m

cronos
�[0;1;30m  └─�[0;mcronos-testnet: �[0;32mcronos-testnet�[0;m

Development
�[0;1;30m  ├─�[0;mGanache-CLI: �[0;32mdevelopment�[0;m
�[0;1;30m  ├─�[0;mGeth Dev: �[0;32mgeth-dev�[0;m
�[0;1;30m  ├─�[0;mHardhat: �[0;32mhardhat�[0;m
�[0;1;30m  ├─�[0;mHardhat (Mainnet Fork): �[0;32mhardhat-fork�[0;m
�[0;1;30m  ├─�[0;mGanache-CLI (Mainnet Fork): �[0;32mmainnet-fork�[0;m
�[0;1;30m  ├─�[0;mGanache-CLI (BSC-Mainnet Fork): �[0;32mbsc-main-fork�[0;m
�[0;1;30m  ├─�[0;mGanache-CLI (FTM-Mainnet Fork): �[0;32mftm-main-fork�[0;m
�[0;1;30m  ├─�[0;mGanache-CLI (Polygon-Mainnet Fork): �[0;32mpolygon-main-fork�[0;m
�[0;1;30m  ├─�[0;mGanache-CLI (XDai-Mainnet Fork): �[0;32mxdai-main-fork�[0;m
�[0;1;30m  ├─�[0;mlocal: �[0;32mlocal�[0;m
�[0;1;30m  ├─�[0;mmainnet-fork-dev: �[0;32mmainnet-fork-dev�[0;m
�[0;1;30m  └─�[0;mcronos-mainnet-fork: �[0;32mcronos-mainnet-fork�[0;m

Connect

NETWORK = "mainnet"

network.connect(NETWORK)

Account

!brownie accounts list

Brownie v1.17.0 - Python development framework for Ethereum

Found 4 accounts:
 �[0;1;30m├─�[0;1;34meth-main�[0;m: �[0;1;35m0xf6EfbD8142A18E741360b41301eDFdbD2719D03C�[0;m
 �[0;1;30m├─�[0;1;34mprem�[0;m: �[0;1;35m0xedEa45C169753E1af9bf1cb1c374Ca83EBd0d6BE�[0;m
 �[0;1;30m├─�[0;1;34mtest�[0;m: �[0;1;35m0xA3c11aDE2244474EB2F8167921216AB6541F9bA8�[0;m
 �[0;1;30m└─�[0;1;34mtest_2�[0;m: �[0;1;35m0xA3c11aDE2244474EB2F8167921216AB6541F9bA8�[0;m

if NETWORK == "mainnet" and False:
    from scripts.helpful_script import get_account

    account = get_account()

else:
    from brownie import accounts

    accounts.load("eth-main") # Main net
    account = accounts[0]

Enter password for "eth-main": ········

print(account)

0xf6EfbD8142A18E741360b41301eDFdbD2719D03C

Dump variables

for key, value in p.__dict__.items():
    print(key)
    brownie.__dict__[key] = p.__dict__[key]

_path
_envvars
_structure
_build_path
_name
_active
_sources
_build
_compiler_config
interface
_containers
PYNFT
ERC721
Strings
__all__
_namespaces

Deploy contracts

from brownie.network import gas_price
from brownie.network.gas.strategies import LinearScalingStrategy
gas_strategy = LinearScalingStrategy("60 gwei", "75 gwei", 1.1)


gas_price(gas_strategy)

<brownie.network.gas.strategies.LinearScalingStrategy at 0x7fb03173d730>

from brownie import PYNFT


pynft = PYNFT.deploy({
    "from": account,
    "gas_price": gas_strategy
})

Transaction sent: �[0;1;34m0xa5c9b02fe2dfee312bb24fee8ae1bc6edd31339ce7db97a11d40f888a5d89b16�[0;m
  Gas price: �[0;1;34m60.0�[0;m gwei   Gas limit: �[0;1;34m1419476�[0;m   Nonce: �[0;1;34m11�[0;m
Transaction sent: �[0;1;34m0x2e38964cbe589ae91b5105b87f77e0b44207942a92127cb09ca155649c7f18da�[0;m
  Gas price: �[0;1;34m66.0�[0;m gwei   Gas limit: �[0;1;34m1419476�[0;m   Nonce: �[0;1;34m11�[0;m
Transaction sent: �[0;1;34m0xd9e803525240d1eb6e4d3e4813a84185451f930e47df4a8c93fdb608cf3950e1�[0;m
  Gas price: �[0;1;34m72.6�[0;m gwei   Gas limit: �[0;1;34m1419476�[0;m   Nonce: �[0;1;34m11�[0;m
  Waiting for confirmation... /

Upload file to IPFS

Assets

prefix = "assets/"


def upload_to_ipfs(filepath: str) -> str:
    return os.popen(f"ipfs add -q {filepath}").read().strip()

def is_an_image(filename: str):
    """
    Description:
        Check if a file is an image
    paramgs:
        filename:
            (str) filename, should be with its extension
    returns:
        (str) qid of ipfs
    """
    for extention in [".png", "jpg"]:
        if filename.endswith(extention):
            return True
    return False

def set_ipfs_share_link(prefix: str, asset: str) -> str:
    """
    description:
        Run IPFS upload process and return share link URL
    params:
        prefix:
            (str) Local prefix file
        asset:
            (str) Filename
    returns:
        (str) share link url
    """
    IPFS_PREFIX = "https://ipfs.io/ipfs"
    qid = upload_to_ipfs(f"{prefix}{asset}".replace(" ", "\ "))
    asset = asset.replace(" ", "-")
    return f"{IPFS_PREFIX}/{qid}?filename={asset}"



class Attribute:
    pass


attribute = Attribute()
for asset in os.listdir(prefix):
    if asset.startswith(".") or asset == "metadata.json":
        # Skip
        continue
    ipfs_share_link = set_ipfs_share_link(prefix, asset)
    if is_an_image(asset):
        setattr(attribute, "image_url", ipfs_share_link)
    else:
        setattr(attribute, "external_url", ipfs_share_link)
    print(ipfs_share_link)

https://ipfs.io/ipfs/Qmda8x41dArU36LKveHzSN3NPJjWxFgyeNNLM8uUMqtMNr?filename=my-first-python-code.png
https://ipfs.io/ipfs/QmUoGY6GbvzSQi2gP7YHtVMRocNW1Xs16ZUHxWcTgWHwJb?filename=fruit-list.py

Set up metadata

Render metadata from template

metadata = {
    "description": """It was in 2015, I was an engineer intern.
    
I was assigned to code in Python for satellite signal processing.

At that time, I had no experience with it, but I had completed C#, C and Matlab courses.

It inspired me to transfer from electrical to software engineer career path.

Now, I partially succeed in software engineering, machine learning and A.I implementation.

This NFT determines where I started.

Moreover, I minting this NFT with my Solidity code I created by myself.

No, it's not my first Solidity project :D

But it's my first Solidity project deployed in `production`.

Which means this is the starting point for my smart contract development.

Smart contract repository is located in https://github.com/batprem/pynft
""", 
    "external_url": attribute.external_url, 
    "image": attribute.image_url, 
    "name": "My first Python code",
    "attributes": [], 
}

Save metadata into JSON

import json


metadata_filename = "metadata.json"

with open(f"assets/{metadata_filename}", "w") as json_file:
    json.dump(metadata, json_file)
    
metadata_share_link = set_ipfs_share_link(prefix, metadata_filename)

Assign to smart contract

Mint

PYNFT[-1].createCollectable({"from": account, "gas_limit": 100000}).wait(1)

Transaction sent: �[0;1;34m0x2b0ebb107a54e1f4dd8cba236ff325f935a3b8586226002cee6dd7363ba50e7e�[0;m
  Gas price: �[0;1;34m60.0�[0;m gwei   Gas limit: �[0;1;34m100000�[0;m   Nonce: �[0;1;34m12�[0;m
Transaction sent: �[0;1;34m0x3687db217fd7ba73f5666086b8d193e8afd05ea2441f025ca324f92081b29a3a�[0;m
  Gas price: �[0;1;34m66.0�[0;m gwei   Gas limit: �[0;1;34m100000�[0;m   Nonce: �[0;1;34m12�[0;m
Transaction sent: �[0;1;34m0xfef11517430a4dec600cde1c9bf9a6d1c1912fab6bdc3800fad85aec3eca93fc�[0;m
  Gas price: �[0;1;34m72.6�[0;m gwei   Gas limit: �[0;1;34m100000�[0;m   Nonce: �[0;1;34m12�[0;m
  Waiting for confirmation... -

Set URI

PYNFT[-1].setBaseURI(metadata_share_link, {"from": account, "gas_limit": 120000}).wait(1)

Transaction sent: �[0;1;34m0x944d8be4c22c3a0fc2c33403d5909f944f2dd070585571c360f2baab956484a5�[0;m
  Gas price: �[0;1;34m60.0�[0;m gwei   Gas limit: �[0;1;34m120000�[0;m   Nonce: �[0;1;34m13�[0;m
Transaction sent: �[0;1;34m0x233bdd1900ea80dc6d245ee5f7be85bcbb1fa42f4ff6f328eafe1770dfc8f6ec�[0;m
  Gas price: �[0;1;34m66.0�[0;m gwei   Gas limit: �[0;1;34m120000�[0;m   Nonce: �[0;1;34m13�[0;m
This transaction already has 2 confirmations.

PYNFT[-1].tokenURI(0)

'https://ipfs.io/ipfs/QmQBZ6VjMeDphzuTGQxxSst7565yjgwvvs8GHtwbayw6hU?filename=metadata.json'

PYNFT[-1].tokenCounter()

Reference

https://www.youtube.com/watch?v=M576WGiDBdQ&t=8373s

sambatlim/pynft

Requirements

Python

IPFS CLI

Import modules

Connect to chain

Connect

Account

Dump variables

Deploy contracts

Upload file to IPFS

Assets

Set up metadata

Render metadata from template

Save metadata into JSON

Assign to smart contract

Mint

Set URI

Reference