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%% @doc Functions for uniquely identifying events.
-export([entropy/2, entropy/0]).
-type entropy() :: 1..4294967296.
%% @equiv entropy(node(), statebox_clock:now())
-spec entropy() -> entropy().
entropy() ->
entropy(node(), statebox_clock:now()).
%% @doc Return an integer that can be expected to be reasonably unique
%% at a given msec timestamp.
-spec entropy(node(), calendar:t_now()) -> entropy().
entropy(Node, Now) ->
erlang:phash2({Node, Now}).
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