TicketService: Smart Contract based ticket sell point

🚧🚧 As a series of changes are being prepared on the frontend branch, this document is now being rewritten.

Author: Javier Rojo @javierlinked

The idea

Live Site

TicketChain TBD: new deployment URL

Walkthrough Video

Walkthrough video TBD: new video once new site is deployed

To Run Locally

Prerequisites

• Node.js >= v16
• Yarn
• git clone [email protected]:javierlinked/ticketchain.git

Contract

Documentation under construction

• yarn

• yarn install

• yarn web

• yarn contract:test

Frontend

• change to client.
• yarn
• yarn start
• Then navigate to http://127.0.0.1:8080

Application will ask to sign with your wallet. The first account in the wallet is the contract owner and it's allowed to create ticket tokens by filling the form, and setting the price and rest of the data.

Hit create and signt with your wallet. Then wait for the transaction to be shown as an alert.

When created at least one set of tokens you can switch to another account and buy them. Set a number to buy (it has to be less or equal to the max allowed per person) and hit buy. Sign the trasnaction. Payment will be performed and tokens transfered. Balance is managed by ERC1155 contract and displayed in the UI.

NOTE: If you receive transaction error and you are using MetaMask, please reset your account and try again.

Not implemented

• Owner can pause the contract. [SECURITY]
• Owner can unpause the contract. [SECURITY]
• Contract Owner see balance of already created tokens.
• Other accounts can see therir balance of already bought tokens.
• Owner can burn a token. This is the case when token is used for the show. But also is a TBD, as token can remain in buyer's wallet as a simple NFT memorabilia, which eventually could be sold in in future auctions.

Tests - CHANGE ME

truffle test

Directory structure

├── packages/                              # base directory for yarn monorepo packages
├── packages/web                           # web3 client that interacts with contract
├── packages/contracts                     # Solidity contract and tooling
├── packages/contracts/test                # Solidity contract unit tests
├── packages/contracts/hardhat.config.ts   # Truffle config
├── design_pattern_decisions.md            # Design pattern decisions
├── avoiding_common_attacks.md             # Some considered potential SWC attacks TBD
└── README.md

Public Ethereum wallet for certification

javierlinked.eth

TODO

• Migrate to ethers.js
• Migrate metadata of a token to a json file in infura or some other offchain solution
• Move Ownable to roles approach
• evaluate gas optimizations
• check contract with slither
• Change UI to React
• Add UI for pausable
• Add a list for minted tokens and balance for contract owner.
• Monorepo
• Migrate to hardhat
• chage everything to typescript in contracts workspace