# .derupt-feed

**The following function is only callable by .derupt-core-yyyymmdd:**

* log-send-message

{% hint style="info" %}
**About Messages**: log-send-message is only callable by the current .derupt-core-yyyymmdd contract.  \
\&#xNAN;*(To prove messages in a transparent order of operations, so that developers have consistent data for presentation across all potential user interfaces)*
{% endhint %}

{% hint style="info" %}
**About Replies:** log-send-message include Reply Messages as inferred by the inclusion of a `reply-to` transaction id argument.\
(The log-send-message function logs send-message calls received from core) \
(The core wraps replies functions as send-message function calls)
{% endhint %}


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