🧾 Example: Fetching BTC & ETH Prices (Solidity)

Here’s a sample Solidity snippet showing how to fetch real-time prices for BTC and ETH using QIE Oracle contracts. These oracles are based on your custom implementation of AggregatorV3.

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🔍 Assumptions

• You have deployed two oracle contracts using your custom AggregatorV3 contract:

  • One for BTC (e.g., BTC/USD)

  • One for ETH (e.g., ETH/USD)

• Both contracts implement AggregatorV3Interface

• The contract addresses are known and passed during deployment

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🧱 Sample Solidity Code

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

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

contract AssetPriceConsumer {
    AggregatorV3Interface public btcOracle;
    AggregatorV3Interface public ethOracle;

    constructor(address _btcOracle, address _ethOracle) {
        btcOracle = AggregatorV3Interface(_btcOracle);
        ethOracle = AggregatorV3Interface(_ethOracle);
    }

    function getLatestBTCPrice() public view returns (int256) {
        (
            , 
            int256 price,
            , 
            , 
        ) = btcOracle.latestRoundData();
        return price;
    }

    function getLatestETHPrice() public view returns (int256) {
        (
            , 
            int256 price,
            , 
            , 
        ) = ethOracle.latestRoundData();
        return price;
    }
}

🧪 Usage

This contract allows you to:

• Fetch the latest BTC/USD and ETH/USD prices

• Use the prices in further contract logic (e.g., swaps, comparisons, liquidations)

You can call:

getLatestBTCPrice(); // Returns the latest BTC price (int256)
getLatestETHPrice(); // Returns the latest ETH price (int256)

⚠️ Notes

• Ensure that the oracle contracts are properly updated by the owner before use.

• The returned price is an int256 and may include decimals (check decimals() from the oracle).

• If the oracle has not been updated yet, latestRoundData() will revert.

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📘 Bonus: Get Oracle Metadata

You can also fetch metadata like description and decimals:

function getBTCMetadata() public view returns (string memory, uint8) {
    return (btcOracle.description(), btcOracle.decimals());
}