[PAN-2936] Add section on EEA compliant privacy (#1769)

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

docs/Privacy/How-To/EEA-Compliant.md

@@ -0,0 +1,39 @@
+description: JSON-RPC methods to use for EEA-compliant privacy 
+<!--- END of page meta data -->
+
+# Using EEA-compliant Privacy 
+
+When using [EEA-compliant privacy](../Explanation/Privacy-Groups.md), the group of nodes specified by `privateFrom`and `privateFor` form a privacy group and are given a unique 
+privacy group ID by Orion.
+
+Enable the [`EEA` API methods](../../Reference/Pantheon-API-Methods.md#eea-methods) 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.
+
+Specify `privateFor` 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. 
+
+## Privacy Group Type 
+
+Privacy groups created when specifying `privateFrom` and `privateFor` are identified as type `LEGACY` 
+when returned by [`priv_findPrivacyGroup`](../../Reference/Pantheon-API-Methods.md#priv_findprivacygroup). 
+
+!!! example
+    ```json 
+    {
+        "jsonrpc": "2.0",
+        "id": 1,
+        "result": [
+          {
+             "privacyGroupId": "68/Cq0mVjB8FbXDLE1tbDRAvD/srluIok137uFOaClM=",
+             "name": "legacy",
+             "description": "Privacy groups to support the creation of groups by privateFor and privateFrom",
+             "type": "LEGACY",
+             "members": [
+                "g59BmTeJIn7HIcnq8VQWgyh/pDbvbt2eyP0Ii60aDDw=",
+                "negmDcN2P4ODpqn/6WkJ02zT/0w0bjhGpkZ8UP6vARk="
+             ]
+          }
+        ]
+    }
+    ```
+

mkdocs.yml

@@ -105,6 +105,7 @@ nav:
           - Using web3.js-eea Multinode Example: Privacy/Tutorials/eeajs-Multinode-example.md
         - How To:
           - Create and Send Private Transactions: Privacy/How-To/Creating-Sending-Private-Transactions.md
+          - Use EEA-compliant Privacy: Privacy/How-To/EEA-Compliant.md
           - Use the web3.js-eea Client Library: Privacy/How-To/eeajs.md
         - Explanation:
           - Privacy Overview: Privacy/Explanation/Privacy-Overview.md