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Klayr Service Blockchain Application Registry

The Blockchain Application Registry service is responsible to serve the off-chain application metadata from the Klayr Application Registry via an API.

Note that this installation instruction is required only for development activities. For a regular Klayr Service user, the official documentation is sufficient to run an instance. The global readme file present in the root directory describes how to run all the microservices simultaneously.

Installation

Prerequisites

Please refer to the README in the project root directory.

Installation

Clone the Klayr Service Repository:

git clone https://github.com/KlayrHQ/klayr-service.git # clone repository
cd klayr-service/services/blockchain-app-registry # move into blockchain-app-registry microservice directory
yarn install --frozen-lockfile # install required Node.js dependencies

Configuration

To configure the different microservices, there are several environment variables the user can define to customize the configurations.

A list of the most commonly used environment variables is presented below:

  • SERVICE_BROKER: URL of the microservice message broker (NATS or Redis).
  • SERVICE_APP_REGISTRY_MYSQL: Connection string of the MySQL instance that the microservice connects to.
  • ENABLE_REBUILD_INDEX_AT_INIT: Boolean flag to truncate the index and rebuild at application init.
  • DEFAULT_APPS: Default blockchain applications. By default, it is set to klayr_mainchain.
  • JOB_INTERVAL_DELETE_NON_METADATA_FILES: Job run interval to delete non-metadata files. By default, it is set to 0.
  • JOB_SCHEDULE_DELETE_NON_METADATA_FILES: Job run cron schedule to delete non-metadata files. By default, it is set to run every day at midnight (0 0 * * *).
  • JOB_INTERVAL_UPDATE_METADATA: Job run interval to update off-chain metadata. By default, it is set to 0.
  • JOB_SCHEDULE_UPDATE_METADATA: Job run cron schedule to update off-chain metadata. By default, it is set to run every 10 minutes (*/10 * * * *).

Note: interval takes priority over schedule and must be greater than 0 to be valid for all the moleculer job configurations.

Management

Start

cd klayr-service/services/blockchain-app-registry # move into the root directory of the blockchain-app-registry microservice
yarn start # start the microservice

Use the framework/bin/moleculer_client.js and framework/bin/moleculer_subscribe.js clients to test specific service endpoints.

Once the process is verified as running correctly, press CTRL+C and start the process with PM2. This will fork the process into the background and automatically recover the process if it fails.

Stop

Press Ctrl+C in the terminal to stop the process.

Contributors

https://github.com/KlayrHQ/klayr-service/graphs/contributors

License

Copyright 2016-2023 Lisk Foundation

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.