Chainlink External Adapter for Synthetix's Index (CryptoCompare)

This adapter pulls the indexes for Synthetix's index synths, retrieves the current market price for each asset from CryptoCompare, and calculates a weighted index.

Environment variables

Variable		Description	Example
API_KEY	Required	Your CryptoCompare API Key	ABCDEFGHJIKLMo64FtaRLRR5BdHEESmha49TM

To get CryptoCompare API credentials, check out https://min-api.cryptocompare.com/.

Install

yarn

Test

yarn test

Create the zip

zip -r cl-synth-index-cc.zip .

Run with Docker

docker build . -t synth-index-cc-adapter
docker run -itd \
    -p 8080:8080 \
    -e API_KEY="Your_cryptocompare_API_key" \
    synth-index-cc-adapter

Install to AWS Lambda

• In Lambda Functions, create function
• On the Create function page:
  • Give the function a name
  • Use Node.js 12.x for the runtime
  • Choose an existing role or create a new one
  • Click Create Function
• Under Function code, select "Upload a .zip file" from the Code entry type drop-down
• Click Upload and select the cl-synth-index-cc.zip file
• Handler should remain index.handler
• Add the environment variable (repeat for all environment variables):
  • Key: API_KEY
  • Value: Your_API_key
• Save

Install to GCP

• In Functions, create a new function, choose to ZIP upload
• Click Browse and select the cl-synth-index-cc.zip file
• Select a Storage Bucket to keep the zip in
• Function to execute: gcpservice
• Click More, Add variable (repeat for all environment variables)
  • NAME: API_KEY
  • VALUE: Your_API_key