magento-test/app/code/Magento/SendFriend/etc/db_schema.xml

<?xml version="1.0"?>
<!--
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<schema xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:noNamespaceSchemaLocation="urn:magento:framework:Setup/Declaration/Schema/etc/schema.xsd">
    <table name="sendfriend_log" resource="default" engine="innodb" comment="Send to friend function log storage table">
        <column xsi:type="int" name="log_id" unsigned="true" nullable="false" identity="true"
                comment="Log ID"/>
        <column xsi:type="bigint" name="ip" unsigned="true" nullable="false" identity="false" default="0"
                comment="Customer IP address"/>
        <column xsi:type="int" name="time" unsigned="true" nullable="false" identity="false" default="0"
                comment="Log time"/>
        <column xsi:type="smallint" name="website_id" unsigned="true" nullable="false" identity="false"
                default="0" comment="Website ID"/>
        <constraint xsi:type="primary" referenceId="PRIMARY">
            <column name="log_id"/>
        </constraint>
        <index referenceId="SENDFRIEND_LOG_IP" indexType="btree">
            <column name="ip"/>
        </index>
        <index referenceId="SENDFRIEND_LOG_TIME" indexType="btree">
            <column name="time"/>
        </index>
    </table>
</schema>