Chainlink

Introduction

Chainlink data feeds are the quickest way to connect your smart contracts to oracle data, such as asset prices.

Chainlink is implemented as a smart contract on Neon EVM, making Chainlink data feeds from the Solana network available for smart contracts to consume.

Each Chainlink feed is available via its own contract. To use a feed, you create a "hybrid" smart contract, i.e. you build the integration with the feed contract into your own smart contract and deploy that. Learn more from Chainlink's documentation, or examine the boilerplate provided.

Deployed feeds

The Chainlink controller contract is deployed on Devnet. This contract implements the AggregatorV3Interface to support the following feeds:

Mainnet

Currency pair	Chainlink contract feed address
AVAX/USD	0x1d6E632542B7E405FAA8D26C4805C981260A9e70
BTC/USD	0x002A8368a4fd76C1809765ea66a9AFa3D424d8e0
BNB/USD	0x3c864365f961f1fb31a6682EB388E84832fd159C
DAI/USD	0xa13Cbd21e5De770Bb9104B951B0b0a876c46ef85
ETH/USD	0xC55B1E0c36A69e2b40BD16759434B071F4bBe8df
LINK/USD	0x22eE81bFA94049c9d880e81c5d40b12423307DFb
MATIC/USD	0x5864ccda29c78845460639021287c3f192350816
OP/USD	0x996c00D1E9DDA20a6d0B7dd516394D5978AC0B92
SOL/USD	0x76721563EC3CF5fB94737Eb583F38f3cD166C7Bb
SRM/USD	0xd010175e4eA718569A105FCbeAa8db44c590730E
USDC/USD	0x8cb22a71AD5ef0384B85FF08Ba1343ec71880C35
USDT/USD	0xba92eACD3fb46661E130577cD03fa32E6D4D757a

Devnet

Currency pair	Chainlink contract feed address
BTC/USD	0x878738FdbCC9Aa39Ce68Fa3B0B0B93426EcB6417
ETH/USD	0x7235B04963600fA184f6023696870F49d014416d
LINK/USD	0xc75E93c4593c23A50cff935F8916774e02c506C7
SOL/USD	0xec852B2A009f49E4eE4ffEddeDcF81a1AD1bbD6d
USDC/USD	0xedc0d80E85292fEf5B0946DEc957563Ceb7C8e6c
USDT/USD	0xE69C1E63ef3E95bE56A50f326aC97Bb7994890aD

Boilerplate contract

View GitHub example

View in Remix

SPDX-License-Identifier: MIT
pragma solidity 0.8.21;

import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";


contract TestChainlink {
    /**
     * Returns the latest price for specific price feed
     */
    function getLatestPrice(address _priceFeed) external view returns (int) {
        (
            /* uint80 roundID */,
            int price,
            /*uint startedAt*/,
            /*uint timeStamp*/,
            /*uint80 answeredInRound*/
        ) = AggregatorV3Interface(_priceFeed).latestRoundData();
        return price;
    }

    /**
     * Returns the decimals for specific price feed
     */
    function getDecimals(address _priceFeed) external view returns (uint8) {
        return AggregatorV3Interface(_priceFeed).decimals();
    }
}