// SPDX-License-Identifier: MIT
pragma solidity >=0.7.6 <0.9;

/**
 * Interface for the `AddressBinder` contract.
 */
interface IAddressBinder {
    /**
     * @notice Event emitted when c-chan and P-chain addresses are registered
     */
    event AddressesRegistered(
        bytes publicKey,
        bytes20 pAddress,
        address cAddress
    );

    /**
     * Register P-chain and C-chain addresses.
     * @param _publicKey Public key from which addresses to register are derived from.
     * @param _pAddress P-chain address to register.
     * @param _cAddress C-chain address to register.
     */
    function registerAddresses(
        bytes calldata _publicKey,
        bytes20 _pAddress,
        address _cAddress
    ) external;

    /**
     * Register P-chain and C-chain addresses derived from given public key.
     * @param _publicKey Public key from which addresses to register are derived from.
     * @return _pAddress Registered P-chain address.
     * @return _cAddress Registered C-chain address.
     */
    function registerPublicKey(
        bytes calldata _publicKey
    ) external returns (bytes20 _pAddress, address _cAddress);

    /**
     * @dev Queries the C-chain address for given P-chain address.
     * @param _pAddress The P-chain address for which corresponding C-chain address will be retrieved.
     * @return _cAddress The corresponding c-address.
     **/
    function pAddressToCAddress(
        bytes20 _pAddress
    ) external view returns (address _cAddress);

    /**
     * @dev Queries the P-chain address for given C-chain address.
     * @param _cAddress The C-chain address for which corresponding P-chain address will be retrieved.
     * @return _pAddress The corresponding p-address.
     **/
    function cAddressToPAddress(
        address _cAddress
    ) external view returns (bytes20 _pAddress);
}