Function hdk::prelude::must_get_agent_activity

pub fn must_get_agent_activity(
    author: HoloHash<Agent>,
    filter: ChainFilter<HoloHash<Action>>
) -> Result<Vec<RegisterAgentActivity, Global>, WasmError>

The chain this filter produces on the given agents chain must be fetched before the validation can be completed. This allows for deterministic validation of chain activity by making a hash bounded range of an agents chain into a dependency for something that is being validated.

Check the ChainFilter docs for more info.