GITBOOK-602: change request with no subject merged in GitBook

SUMMARY.md

@@ -42,6 +42,7 @@
   * [🪂 Airdrop](guides/periphery/airdrop.md)
   * [👀 Previewer (read-only)](guides/peripheral-contracts/previewer-read-only.md)
   * [👓 DebtPreviewer (read-only)](guides/peripheral-contracts/debtpreviewer-read-only.md)
+  * [RatePreviewer (read-only)](guides/periphery-contracts/ratepreviewer-read-only.md)
 * [✨ Features](guides/features/README.md)
   * [Bad Debt Clearing](guides/features/automatic-bad-debt-clearing.md)
   * [Dynamic Close Factor](guides/features/dynamic-close-factor.md)

guides/periphery-contracts/ratepreviewer-read-only.md

@@ -0,0 +1,9 @@
+---
+icon: glasses-round
+---
+
+# RatePreviewer (read-only)
+
+The `RatePreviewer` contract is a helper tool within Exactly Protocol designed to calculate and retrieve key metrics from the protocol's lending markets. It consolidates data such as floating debt, floating assets, interest rates, and fixed pool details for all registered markets. By providing structured snapshots of market states, it simplifies analysis, optimizes blockchain queries, and supports external tools or dashboards with comprehensive and accessible data.
+
+**GitHub URL:** [**https://github.com/exactly/protocol/blob/main/contracts/periphery/RatePreviewer.sol**](https://github.com/exactly/protocol/blob/main/contracts/periphery/RatePreviewer.sol)