How to get access the ID of all posts of custom post type in Gutenberg editor

var el = wp.element.createElement
var withSelect = wp.data.withSelect

wp.blocks.registerBlockType('voucher/shortcode', {
title: 'Voucher Shortcode',
icon: 'smiley',
category: 'common',
attributes: {
    category: {
        type: 'string',
    }
},

edit: withSelect( function( select ) {
            var pages = select('core').getEntityRecords('postType', 'voucher', { per_page: -1 });

            return {
                posts: pages
            };
        } )

     (function(props) { 

            if ( ! props.posts ) {
                return "Loading...";
            }

            if ( props.posts.length === 0 ) {
                return "No posts";
            }
            var className = props.className;
            var post = props.posts[ 0 ];

            var options = [];
            var option = el(
                            'option',
                            { value: '' },
                            __('Choose')
                            );
            options.push(option);

            for (var i = 0; i < props.posts.length; i++) {
                 option = el(
                                'option',
                                { value: props.posts[i].id },
                                props.posts[i].title.raw
                                );
                options.push(option);
            }

            return [
                    el('select', {
                        onChange: onSelectVoucher,
                        },
                        options
                        )
            ]
    }),

    save: function() {

          return null;
    } })

You can try this for creating a dynamic select field with your CPTs voucher.
The event-function onChange: onSelectVoucher is up to you what should happen.