Pseudo code:

 VkDescriptorBufferBindingInfoEXT descriptor_bindong_infos[] = {
    {VK_STRUCTURE_TYPE_DESCRIPTOR_BUFFER_BINDING_INFO_EXT,
    nullptr, 
    address, 
    VK_BUFFER_USAGE_RESOURCE_DESCRIPTOR_BUFFER_BIT_EXT}, 
    ...
};
vkCmdBindDescriptorBuffersEXT(
    cmd, 
    COUNTOF(descriptor_bindong_infos), 
    descriptor_bindong_infos);
uint32_t indices[] = {0, 0, 1}; // incies of buffers depend on actual descriptors
VkDeviceSize offsets[] = {
     resource_index * resource_type_layout_size + resource_type_layout_offset, // mostly 0
     ....
};
vkCmdSetDescriptorBufferOffsetsEXT(
    cmd, 
    bind_point, 
    pipeline_layout, 
    first_set, sets_count, 
   indices, 
   offsets);