Feels like I'm reading something I could have wrote - I did this some years ago at a startup and have been doing it ever since. I'm using single-character prefixes in most places and having typed ids is so nice to be able to immediately look at an id and know what it's used for or what type of entity it refers to.<p>I find one type char and 11 base58 chars sufficient - 12 total, gives me more values than you can store in a 64-bit int...