Answer-To-Earn

Toy backend of abstractive Answer-To-Earn dApp for placing, answering to and accepting of answers to a various questions

Overview

I came across a simple idea to code an application, which gives opportunity to earn some money by sharing a knowledge. There are many related projects, such as Quora as an example, where experts sharing expertise in different domains in a form of answering questions. AFAIK non of them rewarding experts financialy and this simple project implements an answer-to-earn mechanic to battle this unfairity. Project were written for educational purposes and can only be treated in the same way.

Specifics

This is a modified version of an idea, described in How To Build a Blockchain Gaming DApp | (Chainlink Engineering Tutorials) with the following changes:

• Supplement procedures (testing, deployment, etc) moved from foundry to brownie, for all the Python folks out there;
• General mechanic is extended, such that funding and rewarding made in custom ERC20 token called QuestionToken, where the one who placed a question can approve or accept someone answer for funds to be sent. Question itself, funding and accepting action has designed in respective smart-contract. Proceeding answers stored off-chain in mind (out of scope of this project), to not wasting gas as it many answers could be given. After completion accepted answer stored on-chain and question marked as inactive;
• Testing is also extended to cover all the logic with different cases

Building and testing

conda env create -f environment.yml
conda activate eth-brownie
pipx install eth-brownie
brownie test . --network development  # tests will pass

More realistic testing should be done on target network, so we can use Polygon mainnet fork (Alchemy API key required) by,

brownie networks add development polygon-main-fork-dev cmd=ganache-cli host=http://127.0.0.1 chain_id=137 fork='https://polygon-mainnet.g.alchemy.com/v2/<your-alchemy-api-key>' accounts=10 mnemonic=brownie port=8545
brownie test . --network polygon-main-fork-dev  # tests will pass

Deploying on-chain, testnet

I'm using Polygon (Mumbai) for playing on live network, and Alchemy as a node provider here. Before running the script make sure you have some MATIC, to get them you can use this faucet.

export PRIVATE_KEY=<your-wallet-private-key>
brownie networks add Polygon alchemy_mumbai host='<your-app-view-key-https>' name='Mumbai (Alchemy)' chainid=80001 explorer='<mumbai-explorer-address>'
brownie run scripts/mumbai_deploy.py --networks alchemy_mumbai

And, frontend?

Focusing on smart-contract development here, feel free to fork and design one.

TODO

• Rewrite this project as a Program for Solana