Added content on Pantheon-extended privacy (#1771)

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

docs/Privacy/How-To/Access-Private-Transactions.md

@@ -0,0 +1,14 @@
+description: Methods for accessing and managing private transactions and privacy groups
+<!--- END of page meta data -->
+
+# Accessing Private and Privacy Marker Transactions 
+
+A private transaction creates a [Privacy Marker Transaction](../Explanation/Private-Transaction-Processing.md) in addition to the private transaction itself. 
+Use [`eth_getTransactionReceipt`](../../Reference/Pantheon-API-Methods.md#eth_gettransactionreceipt) to 
+get the transaction receipt for the Privacy Maker Transaction and [`eea_getTransactionReceipt`](../../Reference/Pantheon-API-Methods.md#eea_gettransactionreceipt) 
+to get the transaction receipt for the private transaction. 
+
+Use [`eth_getTransactionByHash`](../../Reference/Pantheon-API-Methods.md#eth_gettransactionbyhash) to 
+get the Privacy Marker Transaction with the transaction hash returned when submitting the private transaction. 
+Use [`priv_getPrivateTransaction`](../../Reference/Pantheon-API-Methods.md#priv_getprivatetransaction) 
+to get the private transaction with the `input` value from the Privacy Marker Transaction. 

docs/Privacy/How-To/Create-Manage-Privacy-Groups.md

@@ -0,0 +1,15 @@
+description: Creating and manage privacy groups
+<!--- END of page meta data -->
+
+Pantheon-extended privacy provides JSON-RPC API methods for creating and managing privacy groups: 
+
+* [`priv_createPrivacyGroup`](../../Reference/Pantheon-API-Methods.md#priv_createprivacygroup)
+* [`priv_findPrivacyGroup`](../../Reference/Pantheon-API-Methods.md#priv_findprivacygroup)
+* [`priv_deletePrivacyGroup`](../../Reference/Pantheon-API-Methods.md#priv_deleteprivacygroup)
+
+!!! tip
+    [EEA-compliant privacy groups](../Explanation/Privacy-Groups.md) can be found and deleted using 
+    [`priv_findPrivacyGroup`](../../Reference/Pantheon-API-Methods.md#priv_findprivacygroup)
+    and [`priv_deletePrivacyGroup`](../../Reference/Pantheon-API-Methods.md#priv_deleteprivacygroup) but 
+    future functionality to update group membership will only be available for privacy groups 
+    created using [`priv_createPrivacyGroup`](../../Reference/Pantheon-API-Methods.md#priv_createprivacygroup). 

docs/Privacy/How-To/Creating-Sending-Private-Transactions.md

@@ -12,25 +12,13 @@ Create and send private transactions using:
 !!! note
     Private transactions either deploy contracts or call contract functions. 
     Ether transfer transactions cannot be private. 
-    
-## Methods for Private Transactions
 
-A private transaction creates a [Privacy Marker Transaction](../Explanation/Private-Transaction-Processing.md) in addition to the private transaction itself. 
-Use [`eth_getTransactionReceipt`](../../Reference/Pantheon-API-Methods.md#eth_gettransactionreceipt) to 
-get the transaction receipt for the Privacy Maker Transaction and [`eea_getTransactionReceipt`](../../Reference/Pantheon-API-Methods.md#eea_gettransactionreceipt) 
-to get the transaction receipt for the private transaction. 
-
-Use [`eth_getTransactionByHash`](../../Reference/Pantheon-API-Methods.md#eth_gettransactionbyhash) to 
-get the Privacy Marker Transaction with the transaction hash returned when submitting the private transaction. 
-Use [`priv_getPrivateTransaction`](../../Reference/Pantheon-API-Methods.md#priv_getprivatetransaction) 
-to get the private transaction with the `input` value from the Privacy Marker Transaction. 
-
-Separate private states are maintained for each [privacy group](../Explanation/Privacy-Overview.md#privacy-groups) so 
+Separate private states are maintained for each [privacy group](../Explanation/Privacy-Groups.md) so 
 the account nonce for an account is specific to the privacy group. That is, the nonce for account A for
 privacy group ABC is different to the account nonce for account A for privacy group AB. Use 
-[`priv_getTransactionCount`](../../Reference/Pantheon-API-Methods.md#priv_getTransactionCount) to get 
+[`priv_getTransactionCount`](../../Reference/Pantheon-API-Methods.md#priv_gettransactioncount) to get 
 the account nonce for an account for the specified privacy group. 
 
 !!! note
-    If sending a large number of private transactions, you may need to calculate the nonce for the account 
-    and privacy group outside the client. 
+    If sending more than 1 transaction to be mined in the same block (that is, you're not waiting for 
+    the transaction receipt), you must calculate the private transaction nonce outside Pantheon. 

docs/Privacy/How-To/Pantheon-Privacy.md

@@ -0,0 +1,49 @@
+description: Pantheon-extended privacy
+<!--- END of page meta data -->
+
+# Using Pantheon-extended Privacy 
+
+Pantheon provides an extended implementation of privacy by allowing a [privacy
+group to be created for a set of participants](../Explanation/Privacy-Groups.md). The privacy group ID 
+must be specified when sending private transactions. 
+
+Using the [`--rpc-http-api`](../../Reference/Pantheon-CLI-Syntax.md#rpc-http-api) or [`--rpc-ws-api`](../../Reference/Pantheon-CLI-Syntax.md#rpc-ws-api)
+command line options enable: 
+
+* [`EEA` API methods](../../Reference/Pantheon-API-Methods.md#eea-methods) 
+* [`PRIV` API methods](../../Reference/Pantheon-API-Methods.md#priv-methods)
+
+Use [`priv_createPrivacyGroup`](../../Reference/Pantheon-API-Methods.md#priv_createprivacygroup) to 
+create the privacy group containing the recipients of the private transaction. 
+
+Specify `privacyGroupId` when creating the signed transaction passed as an input parameter to [`eea_sendRawTransaction`](../../Reference/Pantheon-API-Methods.md#eea_sendrawtransaction)
+to create an EEA-compliant private transaction. 
+
+!!! note
+    Support for specifying `privacyGroupId` when using `eea_sendTransaction` with EthSigner will be available in
+    a future EthSigner release. 
+    
+## Privacy Group Type 
+
+Privacy groups created using  [`priv_createPrivacyGroup`](../../Reference/Pantheon-API-Methods.md#priv_createprivacygroup)
+are identified as type `PANTHEON` when returned by [`priv_findPrivacyGroup`](../../Reference/Pantheon-API-Methods.md#priv_findprivacygroup).
+
+!!! example 
+    ```json
+    {
+      "jsonrpc": "2.0",
+      "id": 1,
+      "result": [
+         {
+           "privacyGroupId": "GpK3ErNO0xF27T0sevgkJ3+4qk9Z+E3HtXYxcKIBKX8=",
+           "name": "Group B",
+           "description": "Description of Group B",
+           "type": "PANTHEON",
+           "members": [
+             "negmDcN2P4ODpqn/6WkJ02zT/0w0bjhGpkZ8UP6vARk=",
+             "g59BmTeJIn7HIcnq8VQWgyh/pDbvbt2eyP0Ii60aDDw="
+           ]
+         }
+      ]
+    }
+    ```

docs/Reference/Pantheon-API-Methods.md

@@ -4028,7 +4028,10 @@ Privacy groups containing only the specified members.
     ```
  
      ```json tab="JSON result"
-     "result": [
+     {
+       "jsonrpc": "2.0",
+       "id": 1,
+       "result": [
          {
            "privacyGroupId": "GpK3ErNO0xF27T0sevgkJ3+4qk9Z+E3HtXYxcKIBKX8=",
            "name": "Group B",