Chainlink Data Feeds on Neon EVM

A smart contract making Chainlink Data Feeds from Solana network available on Neon EVM.

Usage

Once deployed, the contract implements AggregatorV3Interface according to the best practices of the Chainlink Data Feeds usage. Follow the official Chainlink documentation to get the latest or historical prices from the data feeds.

Development

  # Install external dependencies
  $ npm install

  # Run tests
  $ npm run test

  # Run linter
  $ npm run lint

  # Deploy to Neon EVM Devnet.
  # Feed address is expected in 32 bytes hex (0x...)
  $ FEED_ADDRESS=<address> npm run deploy:devnet

  # Fetch data from devnet, including feed meta, latest rounds and arbitrary
  # round.
  # Oracle contract address is expected in 20 bytes hex (0x...)
  # Round identifier as a plain unsigned integer
  $ ORACLE_ADDRESS=<address> ROUND=<round> node playground.js

Deployment

1. Create a .secret file with a mnemonic passphrase of the account you want to deploy the oracle contract from.
2. Edit truffle-config.js to set the Neon EVM network you want to deploy to. Neon EVM devnet is already available there as devnet.
3. Choose Chainlink Data Feed address on the corresponding Solana network from devnet or mainnet
4. Convert the address from Solana format (base58 encoded) to 32 bytes hex. You can use online CyberChef converter.
5. Deploy the contract using

FEED_ADDRESS=<address> truffle migrate --network <network>

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/hoodieshq/chainlink-neon.

License

The code is available as open source under the terms of the MIT License.