Added perm_reloadPermissionsFromFile

Signed-off-by: Adrian Sutton <adrian.sutton@consensys.net>

docs/Permissions/Permissioning.md

@@ -18,11 +18,16 @@ A node with node whitelisting enabled communicates only with nodes in the nodes
 Node whitelisting is at the node level. That is, each node in the network has a [`permissions_config.toml`](#permissions-configuration-file)
 file in the [data directory](../Reference/Pantheon-CLI-Syntax.md#data-path) for the node.  
 
-To view or update the nodes whitelist when the node is running, use the JSON-RPC API methods:
+To update the nodes whitelist when the node is running, use the JSON-RPC API methods:
  
 * [perm_addNodesToWhitelist](../Reference/JSON-RPC-API-Methods.md#perm__addnodestowhitelist)
 * [perm_removeNodesFromWhitelist](../Reference/JSON-RPC-API-Methods.md#perm_removeNodesFromWhiteList)
-* [perm_getNodesWhitelist](../Reference/JSON-RPC-API-Methods.md#perm_getNodesWhiteList)
+
+Alternatively, update the [`permissions_config.toml`](#permissions-configuration-file) file directly and use the 
+[`perm_reloadPermissionsFromFile`](../Reference/JSON-RPC-API-Methods.md#perm_reloadpermissionsfromfile) method 
+to update the whitelists. 
+
+To view the nodes whitelist, use the [perm_getNodesWhitelist](../Reference/JSON-RPC-API-Methods.md#perm_getNodesWhiteList) method. 
 
 !!! note
     Each node has a `permissions_config.toml` file which means nodes can have different nodes whitelists. 
@@ -103,11 +108,16 @@ can synchronise and add blocks containing transactions from accounts that are no
     On-chain permissioning is under development. On-chain permissioning will use one on-chain 
     nodes whitelist. 
 
-To view or update the accounts whitelist when the node is running, use the JSON-RPC API methods: 
+To update the accounts whitelist when the node is running, use the JSON-RPC API methods: 
+
+* [`perm_addAccountsToWhitelist`](../Reference/JSON-RPC-API-Methods.md#perm_addAccountsToWhitelist)
+* [`perm_removeAccountsFromWhitelist`](../Reference/JSON-RPC-API-Methods.md#perm_removeAccountsFromWhitelist)
+
+Alternatively, update the [`permissions_config.toml`](#permissions-configuration-file) file directly and use the 
+[`perm_reloadPermissionsFromFile`](../Reference/JSON-RPC-API-Methods.md#perm_reloadpermissionsfromfile) method 
+to update the whitelists.
 
-* [perm_addAccountsToWhitelist](../Reference/JSON-RPC-API-Methods.md#perm_addAccountsToWhitelist)
-* [perm_removeAccountsFromWhitelist](../Reference/JSON-RPC-API-Methods.md#perm_removeAccountsFromWhitelist)
-* [perm_getAccountsWhitelist](../Reference/JSON-RPC-API-Methods.md#perm_getAccountsWhitelist)
+To view the accounts whitelist, use the [`perm_getAccountsWhitelist`](../Reference/JSON-RPC-API-Methods.md#perm_getAccountsWhitelist) method.
 
 ### Enabling Account Whitelisting 
 

docs/Reference/JSON-RPC-API-Methods.md

@@ -2386,6 +2386,35 @@ including invalid enode URLs.
     {"jsonrpc":"2.0","method":"perm_removeNodesFromWhitelist","params":[["enode://7e4ef30e9ec683f26ad76ffca5b5148fa7a6575f4cfad4eb0f52f9c3d8335f4a9b6f9e66fcc73ef95ed7a2a52784d4f372e7750ac8ae0b544309a5b391a23dd7@127.0.0.1:30303","enode://2feb33b3c6c4a8f77d84a5ce44954e83e5f163e7a65f7f7a7fec499ceb0ddd76a46ef635408c513d64c076470eac86b7f2c8ae4fcd112cb28ce82c0d64ec2c94@127.0.0.1:30304"]], "id":1}
     ```
     
+    ```json tab="JSON result"
+    {
+        "jsonrpc": "2.0",
+        "id": 1,
+        "result": "Success"
+    }
+    ```
+    
+### perm_reloadPermissionsFromFile
+
+Reloads the accounts and nodes whitelists from the [permissions configuration file](../Permissions/Permissioning.md#permissions-configuration-file). 
+
+**Parameters** 
+
+None
+
+**Returns** 
+
+`result` - `Success` or `error` if the permissions configuration file is not valid.
+
+!!! example
+    ```bash tab="curl HTTP request"
+    $ curl -X POST --data '{"jsonrpc":"2.0","method":"perm_reloadPermissionsFromFile","params":[], "id":1}' <JSON-RPC-http-endpoint:port>
+    ```
+    
+    ```bash tab="wscat WS request"
+    {"jsonrpc":"2.0","method":"perm_reloadPermissionsFromFile","params":[], "id":1}
+    ```
+    
     ```json tab="JSON result"
     {
         "jsonrpc": "2.0",