Add state overrides.

Signed-off-by: bgravenorst <byron.gravenorst@consensys.net>

Author: bgravenorst

services/reference/linea/json-rpc-methods/linea_estimategas.mdx

@@ -30,7 +30,7 @@ We recommend using `linea_estimateGas` for more accurate results.
 
 ## Parameters
 
-- `TRANSACTION CALL OBJECT` _\[required]_
+- `call`: _\[required]_ Transaction call object:
   - `from`: _\[optional]_ 20 bytes - The address the transaction is sent from.
   - `to`: _\[optional]_ 20 bytes - The address the transaction is directed to.
   - `gas`: _\[optional]_ Hexadecimal value of the gas provided for the transaction execution. `linea_estimateGas` consumes
@@ -41,11 +41,12 @@ We recommend using `linea_estimateGas` for more accurate results.
   - `value`: _\[optional]_ Hexadecimal value of the value sent with this transaction.
   - `data`: _\[optional]_ Hash of the method signature and encoded parameters. See the
       [Ethereum contract ABI specification](https://docs.soliditylang.org/en/latest/abi-spec.html).
-- `blockParameter`: (string) [_optional_] A hexadecimal block number, or one of the tags `latest`, `earliest`, `pending` or `finalized`. See the [default block parameter](https://ethereum.org/en/developers/docs/apis/json-rpc/#default-block).
-  :::warning
-  `safe` isn't supported. Use `finalized` instead.
-  Learn more about [Linea's layer 2 finalization](https://docs.linea.build/developers/guides/finalized-block). 
-  :::
+- `stateOverride`: _\[optional]_  Object that contains the address-to-state mapping to [override state values](#override-state-values)
+    Each entry specifies a state that will be temporarily overridden before executing the call:
+  - `balance`: _\[optional]_ Hexadecimal of the temporary account balance for the call execution.
+  - `nonce`: _\[optional]_ Hexadecimal of the temporary nonce value for the call execution.
+  - `code` : _\[optional]_ Bytecode to inject into the account.
+  - `stateDiff`: `key:value` pairs to override individual slots in the account storage.
 
 ## Returns
 
@@ -95,3 +96,35 @@ Replace `<YOUR-API-KEY>` with an API key from your [MetaMask Developer dashboard
 ```
   </TabItem>
 </Tabs>
+
+## Override state values
+
+You can to override an account with temporary state values before
+making the call. This allows you to make temporary state changes without affecting the actual
+blockchain state.
+
+For example, here we'll override the balance of account `0xfe3b557e8fb62b89f4916b721be55ceb828dbd73`
+to ensure it has sufficient funds to estimate transferring ETH to the specified account:
+
+```json
+curl https://linea-mainnet.infura.io/v3/<YOUR-API-KEY> \
+  -X POST \
+  -H "Content-Type: application/json" \
+  -d '{
+    "jsonrpc":"2.0",
+    "method":"linea_estimateGas",
+    "params":[
+        {
+            "from":"0xfe3b557e8fb62b89f4916b721be55ceb828dbd73",
+            "to":"0x627306090abaB3A6e1400e9345bC60c78a8BEf57",
+            "value":"0xDE0B6B3A7640000"
+        },
+        {
+            "0xfe3b557e8fb62b89f4916b721be55ceb828dbd73": {
+                "balance": "0x4563918244F40000"
+            }
+        }
+    ],
+    "id":53
+}'
+```