DynamicFlarePrice

DynamicURIContract.sol

// SPDX-License-Identifier: MIT

pragma solidity >=0.7.0 <0.9.0;

import { IPriceSubmitter } from "@flarenetwork/flare-periphery-contracts/flare/ftso/userInterfaces/IPriceSubmitter.sol";
import { IFtsoRegistry } from "@flarenetwork/flare-periphery-contracts/flare/ftso/userInterfaces/IFtsoRegistry.sol";
import { IFlareContractRegistry} from "@flarenetwork/flare-periphery-contracts/coston2/util-contracts/userInterfaces/IFlareContractRegistry.sol";

contract SimpleFtsoExample {

    string public higherPriceURI;
    string public lowerPriceURI;
    uint256 public targetPrice;

    constructor(string memory h, string memory l, uint256 tPrice){
        higherPriceURI = h;
        lowerPriceURI = l;
        targetPrice = tPrice;
    }

    function getPriceSubmitter() public view virtual returns (IPriceSubmitter) {
        return IPriceSubmitter(0x1000000000000000000000000000000000000003);
    }

    function getFtsoRegistry() public view virtual returns(IFtsoRegistry){
        return IFtsoRegistry(getFlareContractRegistry().getContractAddressByName("FtsoRegistry"));
    }

    function getFlareContractRegistry() public view virtual returns (IFlareContractRegistry) {
        return IFlareContractRegistry(0xaD67FE66660Fb8dFE9d6b1b4240d8650e30F6019); // Coston2
        // return IFlareContractRegistry(0xaD67FE66660Fb8dFE9d6b1b4240d8650e30F6019); // Flare
    }

    function getTokenPriceWei(
        string memory foreignTokenSymbol
    )
        public
        view
        returns (uint256 _price, uint256 _timestamp, uint256 _decimals)
    {
        IFtsoRegistry ftsoRegistry = getFtsoRegistry();
        (_price, _timestamp, _decimals) = ftsoRegistry
            .getCurrentPriceWithDecimals(foreignTokenSymbol);
    }

    function getCorrectURI() public view returns(string memory){
        // Use test prefixed string on coston2
        (uint256 _price, ,) = getTokenPriceWei("BTC");
        // Generating code like this should not be that difficult for a simple boolean expression -> chain of if-then-else
        if(_price >= targetPrice){
           return higherPriceURI;
        } 
        return lowerPriceURI;
    }
}