IPriceRegistry.sol

// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;

import {Internal} from "../libraries/Internal.sol";

interface IPriceRegistry {
  /// @notice Update the price for given tokens and destination chain.
  /// @param priceUpdates The price updates to apply.
  function updatePrices(Internal.PriceUpdates memory priceUpdates) external;

  /// @notice Get the `tokenPrice` for a given token.
  /// @param token The token to get the price for.
  /// @return tokenPrice The tokenPrice for the given token.
  function getTokenPrice(address token) external view returns (Internal.TimestampedUint192Value memory);

  /// @notice Get the `tokenPrice` for a given token, checks if the price is valid.
  /// @param token The token to get the price for.
  /// @return tokenPrice The tokenPrice for the given token if it exists and is valid.
  function getValidatedTokenPrice(address token) external view returns (uint192);

  /// @notice Get the `tokenPrice` for an array of tokens.
  /// @param tokens The tokens to get prices for.
  /// @return tokenPrices The tokenPrices for the given tokens.
  function getTokenPrices(address[] calldata tokens) external view returns (Internal.TimestampedUint192Value[] memory);

  /// @notice Get the `gasPrice` for a given destination chain ID.
  /// @param destChainSelector The destination chain to get the price for.
  /// @return gasPrice The gasPrice for the given destination chain ID.
  function getDestinationChainGasPrice(
    uint64 destChainSelector
  ) external view returns (Internal.TimestampedUint192Value memory);

  /// @notice Gets the fee token price and the gas price, both denominated in dollars.
  /// @param feeToken The source token to get the fee for. Must be a feeToken.
  /// @param destChainSelector The destination chain to get the gas price for.
  /// @return feeTokenPrice The price of the feeToken in 1e18 dollars per base unit.
  /// @return gasPrice The price of gas in 1e18 dollars per base unit.
  function getFeeTokenAndGasPrices(
    address feeToken,
    uint64 destChainSelector
  ) external view returns (uint192 feeTokenPrice, uint192 gasPrice);

  /// @notice Convert a given token amount to target token amount.
  /// @param fromToken The given token address.
  /// @param fromTokenAmount The given token amount.
  /// @param toToken The target token address.
  /// @return toTokenAmount The target token amount.
  function convertTokenAmount(
    address fromToken,
    uint256 fromTokenAmount,
    address toToken
  ) external view returns (uint256 toTokenAmount);
}