History Queries, Based on Flake Format
You can see the history of any flakes that match a certain pattern. Specifiying either a predicate or a subject is required.
For example, to query the history of updates to the
person/follows predicate on the
["person/handle", "zsmith"] subject, you could issue the following query:
"history": [["person/handle", "zsmith"], "person/follows"]
If, however, we were interested in looking at flakes that matched any subject with the predicate,
person/handle, and the object, jdoe, we would issue:
"history": [null, "person/handle", "jdoe"]
If we skip the subject, we need to put
null, whereas we can just omit a flake-pattern without an object (because it is at the end of our array).
Write a history query looking at the history of subject 1234 and predicate person/handle.