interface Nest_3_OfferPrice {
    // Add price data
    function addPrice(uint256 ethAmount, uint256 tokenAmount, uint256 endBlock, address tokenAddress, address offerOwner) external;
    // Modify price
    function changePrice(uint256 ethAmount, uint256 tokenAmount, address tokenAddress, uint256 endBlock) external;
    function updateAndCheckPricePrivate(address tokenAddress) external view returns(uint256 ethAmount, uint256 erc20Amount);
}
// Price contract
function changePrice(uint256 ethAmount, uint256 tokenAmount, address tokenAddress, uint256 endBlock) external;

// Modify price