cl-ea-price-kotlin

A Chainlink compatible External Adapter that supports a REST API and AWS Lambda Handler.

This adapter interfaces with the CryptoCompare data source.

This is a Gradle project built using OpenJDK 15 with Micronaut.

Building the application

1. Build the JAR:

./gradlew clean build

Run with Docker

1. Create the Docker image:

docker build -t cl-ea-price-kotlin .

2. Get your image ID:

docker images

3. Start the Docker container:

docker run -p 7080:7080 <image_id> 

Run without Docker

1. To start the application, run the main class:

Main.kt

Sending requests

1. Send requests as follows:

POST: http://localhost:7080
Headers: Content-Type application/json
Body:
{
    "id": 123,
    "data": {
        "from": "ETH",
        "to": "CAD"
    }
}

Response:

{
    "jobRunId": 123,
    "data": "{\"CAD\":3325.15}"
}

Running the tests

1. Run the tests using:

./gradlew clean build

Caching (Recommended)

A cache is enabled by default. The adapter does not support an API key (this may be added in a future release).

1. A Caffeine cache is enabled by default.
2. It supports the following configuration options in the application.yml:

micronaut.caches.prices.initial-capacity
micronaut.caches.prices.maximum-size
micronaut.caches.prices.maximum-weight
micronaut.caches.prices.expire-after-write
micronaut.caches.prices.expire-after-access

For more information on each property, take a look at the documentation.

Logging

1. The project uses Logback, which can be configured in:

/src/resources/logback.xml

2. To enable DEBUG logs, update:

<root level="info">

To:

<root level="debug">