Pay Influence on Tribute transfers

/**
 * Payout 50 Influence on Transfers
 * Will pay both the sender and the recipient x "Influence" when
 * transfering Tributes.
 * @version 1.0
 */
add_filter( 'mycred_add_finished', 'mycred_pro_give_out_influence', 10, 3 );
function mycred_pro_give_out_influence( $result, $request, $mycred ) {

    if ( $result === false || $request['type'] == 'mycred_default' || $request['ref'] != 'transfer' )
        return $result;

    extract( $request );

    // How much influence a user gets
    $influence_to_give = 50;

    // Update users balance
    $mycred->update_users_balance( $user_id, $influence_to_give, $type );

    // Add a log entry. ( do not use $mycred->add_creds() here! )
    $mycred->add_to_log(
        'influence_from_transfer',
        $user_id,
        $influence_to_give,
        'Influence for making a transfer',
        $ref_id,
        $data,
        'mycred_default'
    );

    // Since this is a filter, we always return something
    return $result;

}