Blind Auctioneer

A DApp that can be used to host blind auctions (school project).

A blind auction is a type of auction where all bidders submit sealed bids during the bidding stage, so that no bidder knows the bid of any other participant. In this case, a sealed bid will be the sha256 hash of the actual bid value concatenated with a 8 byte nonce. The bidders will then reveal their bids during the reveal stage, and the highest bidder will win after this stage ends. Compared to a standard auction, a blind auction has the advantage that there is no time pressure towards the end of the bidding period.

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes.

Dependencies

• Node.js v12.16.1
• Ganache CLI v6.9.1
• Truffle Suite v5.1.22
• py-solc-x v0.8.1

Installing

Install NodeJS modules

$ npm install

Install Solidity compiler

$ pip3 install py-solc-x
$ python3 -m solcx.install v0.6.1

Running

First, make sure ganache is running on on 127.0.0.1:8545. Then run it with:

$ python3 server.py
$ npm start

Running the tests

First, make sure ganache is running on on 127.0.0.1:8545. Also, the stage during in the BlindAuction contract needs to be changed to 5 seconds for testing purposes. Deploy the contracts with:

$ truffle migrate --reset

Then run the tests with:

$ truffle test

Preview