Concordium Decentralized(DEX) application

The example project included in this repository, serves as a working example of using the concordium IDs to verify if a user is/above 18 and belongs to at least one of the countries specified. The webpage will only display the DEX if the user has provided a proof for the statement that the backend demands.

The backend for this demo can be found in the verifier folder:

Hosted front end

Hosted front end link testnet

Prerequisites

• Browser wallet extension must be installed in google chrome(V8 engine) and have an account, in order to connect and authorize.
• Access to a concordium node exposing the v2 GRPC API. (The backend expects it on localhost:20000, but this can be changed using the node parameter)
• Cargo/rustc installed (to build the rust backend).

Installing

• Run yarn.

Running the example

• Run yarn build in a terminal

• Run yarn build-verifier (This builds the backend using cargo/rustc)

• Run yarn start --statement "$(<verifier/config/statement.json)" --names "$(<verifier/config/names.json)" --node https://grpc.testnet.concordium.com:20000 (This will run the backend, which also host the front-end, check its README for more information)

• Open URL logged in console (on default http://127.0.0.1:8100)

To have hot-reload on the front-end (useful for development), run yarn watch in a separate terminal instead of yarn build in the first step.

Run as docker

The dockerfile must be run from the project's root folder, ex:

docker build -t dex -f concordium-dex-dapp/Dockerfile .

The image can then be run with:

docker run dex -p 8100:8100

See the docker file to see which environment variables can used to overwrite parameters.

Useful Resources

• Demo Website: https://concordium-dex-dapp.onrender.com
• Technical Guide: Detailed documentation covering contract architecture, functions, and implementation details can be found here
• Concordium Guide: Step-by-step instructions for installing the concordium client in the documentation
• Frontend Interface: Simple UI for interacting with the DEX contract
• Concordium Documentation: https://developer.concordium.software/
• Concordium Website: https://www.concordium.com/
• Concordium Support: https://support.concordium.software/
• Discord: https://discord.com/invite/GpKGE2hCFx