ESIP-1: Contract functionality for ETHScriptions through Event driven transactions. Indexer must check for topic: `Enscription(address,address,bytes)`

ESIP-1.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

import "./IESIP-1.sol";

contract ESIP1 is IESIP1 {

    /**
     * @dev Enscribes `data` to `to` address.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `data` cannot be blank.
     *
     * Emits a {Enscription} event.
     */
    function enscribe(address to, bytes memory data) public {
        if (to == address(0)) {
            revert EnscriptionToZeroAddress();
        }

        emit Enscription(msg.sender, to, data);
    }

    /**
     * @dev Loops through `to` and `data` arrays to enscribe to
     * each respective address.
     *
     * Requirements:
     *
     * - `to` addresses cannot be the zero address.
     * - `data` values cannot be blank.
     *
     * Emits {Enscription} events based on number of addresses supplied.
     */
    function batchEnscribe(address[] memory to, bytes[] memory data) public {
        if (to.length != data.length) {
            revert MismatchBatchLengths();
        }

        unchecked {
            for (uint i=0;i<to.length;i++) {
                if (to[i] == address(0)) {
                    revert EnscriptionToZeroAddress();
                }
                emit Enscription(msg.sender, to[i], data[i]);
            }
        }
    }

}

IESIP-1.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;


interface IESIP1 {

    /**
     * In batch enscriptions, the `to` array and `data` array must match in length.
     */
    error MismatchBatchLengths();

    /**
     * Enscriptions cannot be sent to the ZeroAddress.
     */
    error EnscriptionToZeroAddress();

    /**
     * @dev Emitted when `enscriptor` calls 
     * (`approved`) `operator` to manage all of its assets.
     */
    event Enscription(address indexed enscriptor, address indexed to, bytes indexed data);

    /**
     * @dev Enscribes `data` to `to` address.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `data` cannot be blank.
     *
     * Emits a {Enscription} event.
     */
    function enscribe(
        address to,
        bytes memory data
    ) external;

    /**
     * @dev Loops through `to` and `data` arrays to enscribe to
     * each respective address.
     *
     * Requirements:
     *
     * - `to` addresses cannot be the zero address.
     * - `data` values cannot be blank.
     *
     * Emits {Enscription} events based on number of addresses supplied.
     */
    function batchEnscribe(
        address[] memory to,
        bytes[] memory data
    ) external;

}