feat:add setting min base fee guide (#1849)

* feat:add setting min base fee guide

* fix: cleaned up setting min base fee guide

* fix:clean up min base fee guide based on review

Co-authored-by: George Knee <[email protected]>

* clean up setting min base fee guide

---------

Co-authored-by: George Knee <[email protected]>

Author: ZakAyesh

chain-operators/guides/features/setting-min-base-fee.mdx

@@ -0,0 +1,70 @@
+---
+title: Set the Minimum Base Fee
+description: Learn how to set a minimum base fee on your OP-Stack Chain
+---
+
+## Overview
+
+| Parameter | Type | Default | Recommended | Max Allowed for Standard Chains | Units |
+| ---------- | ---- | -------- | ------------ | ------------ | ------ |
+| <code>minBaseFee</code> | Number | 0 (disabled) | 100,000 | 10,000,000,000 | wei |
+
+The <strong>Minimum Base Fee</strong> (`minBaseFee`) configuration was introduced in the <strong>Jovian</strong> hardfork. 
+This feature allows chain operators to specify a minimum L2 base fee to which can help avoid excessively long priority fee auctions that can occur when the base fee falls too low.
+
+When [batcher-sequencer throttling is active](https://docs.optimism.io/chain-operators/guides/configuration/batcher#batcher-sequencer-throttling) for long enough and the minBaseFee isn't enabled (or is zero), the base fee can drop all the way down to 1 wei. It can take a long time to recover back to a stable base fee.
+
+
+The steps below explain how to update the `minBaseFee` parameter on-chain using the <code>SystemConfig</code> contract.
+
+<Warning>
+  Setting the `minBaseFee` too high may make transactions harder to include for users.
+</Warning>
+
+
+## How to Update the Minimum Base Fee
+
+<Steps>
+  <Step title="Find your SystemConfig contract address">
+    The [SystemConfig](https://specs.optimism.io/protocol/system-config.html) contract stores configurable protocol parameters such as gas limits and fee settings.  
+    You can find its proxy address in the [state.json generated by op-deployer](https://docs.optimism.io/chain-operators/tutorials/create-l2-rollup/op-deployer-setup#deploy-l1-contracts).
+  </Step>
+
+  <Step title="Call the setMinimumBaseFee() method">
+   <Info>
+    Note that the owner of the `SystemConfig` contract is the [System Config Owner address](https://docs.optimism.io/chain-operators/reference/privileged-roles#system-config-owner), so this transaction must be sent from that address.
+    </Info>
+    To update the minimum base fee, call the following method on the `SystemConfig` contract:
+
+    `setMinBaseFee(uint64 minBaseFee) external onlyOwner;`
+   
+    Example (using [cast](https://getfoundry.sh/cast/reference/cast/)):
+
+    ```
+    cast send <SYSTEM_CONFIG_PROXY_ADDRESS> "setMinBaseFee(uint64)" 100000 
+    ```
+  </Step>
+
+  <Step title="Verify the new value">
+    After the transaction confirms, verify the current value by calling the following getter method on the `SystemConfig` contract:
+    
+    `function minBaseFee() external view returns (uint64);`
+
+    Example (using [cast](https://getfoundry.sh/cast/reference/cast/)):
+
+    ```
+    cast call <SYSTEM_CONFIG_PROXY_ADDRESS> "minBaseFee()"
+    ```
+  </Step>
+</Steps>
+
+---
+
+## References
+
+* [Minimum Base Fee Configuration Spec](https://specs.optimism.io/protocol/jovian/system-config.html#minimum-base-fee-configuration)
+* [Jovian Upgrade Spec](https://specs.optimism.io/protocol/jovian/overview.html)
+* [SystemConfig Contract Spec](https://specs.optimism.io/protocol/system-config.html)
+* [Design Doc](https://github.com/ethereum-optimism/design-docs/blob/main/protocol/minimum-base-fee.md)
+
+

docs.json

@@ -1549,7 +1549,8 @@
               {
                 "group": "Features",
                 "pages": [
-                  "chain-operators/guides/features/alt-da-mode"
+                  "chain-operators/guides/features/alt-da-mode",
+                  "chain-operators/guides/features/setting-min-base-fee"
                 ]
               },
               {