A ProxySigner is a utility that fetches and signs message from any API for the DIRT Protocol Oracle.
This ProxySigner repo fetches data from cryptocurrency exchanges using the Cryptocurrency Exchange Trading Library - CCXT. There are two methods in index.js:
signAndPackPrice- signs the message using your private key. Allows onchain verification that that the message came from an approved source using your public key.fetchData- pulls data from cryptocurrency exchanges using CCXT. Modify this section to fetch data from other sources.
For more details on the role of the ProxySigner in the DIRT Oracle network, read the protocol design.
See the web3 documentation to generate an Ethereum public / private key pair. Do NOT share your private key
Create an .env file, and add three environment variables:
WEB3_PROVIDER_URL=https://ropsten.infura.io/[YOUR ID]
SOURCE=YOUR SOURCE FROM CCXT
PROXY_SECRET_KEY=YOUR PRIVATE KEY
Run source .env
yarn installenv $(cat .env) node index.js- Navigate to
localhost:3000
Deploy on Google Cloud Functions
Enter the script in your root directory:
gcloud functions deploy myproxysigner --source=. --env-vars-file=.env --trigger-http
The command above assumes the .env file is in the root directory of the project. Omit --trigger-http on subsequent deployments.
Check Status After deploying the ProxySigner, run this command to check the HTTPS URL of the ProxySigner:
gcloud functions describe myproxysigner
The ProxySigner accepts a query string parameter pair and will return the
current price for that market pair from the current SOURCE. For example,
you could use this URL to test your ProxySigner:
https://[your proxysigner URL]?pair=ETH/USD