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About

Dynamic NFT Application, that allows users to convert pieces of art into dynamic tokens stored on chain

Prerequisites

Please install or have installed the following:

Installation

  1. Install Brownie, if you haven't already. Here is a simple way to install brownie.
pip install eth-brownie
  1. Install ganache-cli
npm install -g ganache-cli
  1. Set your WEB3_INFURA_PROJECT_ID, and PRIVATE_KEY environment variables. You can get this by getting a free trial of Infura. At the moment, it does need to be infura. You can find your PRIVATE_KEY from your ethereum wallet like metamask.

Otherwise, you can build, test, and deploy on your local environment.

Deploy a contract

brownie run scripts/deploy-spirited_contract.py --network rinkeby

TokenURI hashes

The project stores available hashes of the art-works deployed to ipfs in a directory token_uri_hashes For example, this is an url indicating a picture from ipfs: "https://ipfs.io/ipfs/QmaSED9ZSbdGts5UZqueFJjrJ4oHH3GnmGJdSDrkzpYqRS". The last part after "/" is the hash which needs to be stored on the contract. Right now contract supports dynamic changes of pictures based on btc price in the following order:

btcPrice < 50_000 = 1 hash
btcPrice >= 50_000 && btcPrice < 60_000 = 2 hash
btcPrice >= 60_000 && btcPrice < 70_000 = 3 hash
btcPrice >= 70_000 && btcPrice < 80_000 = 4 hash
btcPrice >= 80_000 && btcPrice < 90_000 = 5 hash
btcPrice >= 90_000 && btcPrice < 100_000 = 6 hash
btcPrice >= 100_000 = 7 hash

Therefore each file in token_uri_hashes directory should contain 7 hashes.

Upload tokenURI hashes to contract

In order to upload tokenURI hashes you can use script:

brownie run scripts/upload_token_uri_hashes.py --network rinkeby

Script contains two variables which you may want to change:
token_id - identifier of a token, which will be linked with provided tokenURIs
token_uri_hashes_filename - file containing hashes

Mint a token

brownie run scripts/mint_token.py --network rinkeby

After minting token is linked to the first tokenURI hash, no matter what the Bitcoin is.

Change tokenURI

brownie run scripts/change_token_uri.py --network rinkeby

script variable:
token_id - identifier of a token which tokenURI will be changed depend on a Bitcoin price at the moment

License

This project is licensed under the MIT license.