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Iroha uses filter-map paradigm to monitor events. Let's look at different types of filters that can be used in Iroha.

Data Filters

A data filter is a tuple with a single variant, which is a FilterOpt of an EntityFilter:

FilterOpt stands for Optional Filter. It can either AcceptAll or accept BySome of another Filter. An EntityFilter is a filter that matches events produced by a certain type entity, e.g. by account or domain.

Here is the list of EntityFilters in Iroha: