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concordia/packages/concordia-app/CONCORDIA.md

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Concordia

The Concordia application is a React app that handles interactions with the contracts and the distributed database used.

This document provides information about the Concordia React Application and how to get it running for development.

Prerequisites

Concordia requires at the minimum two services to work, a blockchain and a rendezvous server.

Furthermore, the deployed contract artifacts must be made available. This can be done in two ways, migrate the contracts and make sure the artifacts are present in the concordia/packages/concordia-contracts/build directory, or migrate the contracts and upload the artifacts to a contracts-provider instance.

Running Concordia

To start the application in development mode simply execute the start script:

yarn start

The application makes use of the environment variables described below.

Environment variable Default value Usage
REACT_APP_CONCORDIA_HOST 127.0.0.1 Set the hostname of the concordia application
REACT_APP_CONCORDIA_PORT 7000 Set the port of the concordia application
REACT_APP_RENDEZVOUS_HOST /ip4/127.0.0.1 Set the hostname of the rendezvous server
REACT_APP_RENDEZVOUS_PORT 9090 Set the port of the rendezvous server
REACT_APP_USE_EXTERNAL_CONTRACTS_PROVIDER false Enable/Disable use of external contracts provider
REACT_APP_CONTRACTS_PROVIDER_HOST http://127.0.0.1 Set the hostname of the contracts provider service
REACT_APP_CONTRACTS_PROVIDER_PORT 8400 Set the port of the contracts provider service
REACT_APP_CONTRACTS_VERSION_HASH latest Set the contracts tag that will be pulled

Attention: if using a contracts provider, make sure that the provider is set to allow CORS from the host-port combo defined by REACT_APP_CONCORDIA_HOST and REACT_APP_CONCORDIA_PORT.