added release Document for 0.2.1

modify description

src/omnicore/doc/release-notes.md

@@ -1,7 +1,7 @@
-Wormhole v0.2.0
+Wormhole v0.2.1
 ===================
 
-v0.2.0 is a pre-release
+v0.2.1 is a pre-release
 
 Please report bugs using the issue tracker on GitHub:
 
@@ -10,13 +10,13 @@ Please report bugs using the issue tracker on GitHub:
 Table of contents
 =================
 
-- [wormhole v0.2.0](#wormhole-core-v020)
+- [wormhole v0.2.1](#wormhole-core-v021)
 - [Upgrading and downgrading](#upgrading-and-downgrading)
   - [How to upgrade](#how-to-upgrade)
   - [Downgrading](#downgrading)
   - [Compatibility with Bitcoin ABC](#compatibility-with-bitcoin-abc)
 - [Notable changes](#notable-changes)
-  - [Add new function to issue ERC721 Property](#Add new function to issue ERC721 Property)
+  - [Add new RPC interface to ERC721 feature](#Add new RPC interface to ERC721 feature)
 - [Change log](#change-log)
 - [Credits](#credits)
 - [Document](#document)
@@ -41,25 +41,23 @@ During the first startup historical Wormhole transactions are reprocessed and Wo
 Downgrading
 -----------
 
-Downgrading to an Wormhole Core version prior 0.2.0 is generally not supported as older versions will not provide accurate information due to the changes in consensus rules.
+Downgrading to an Wormhole Core version prior 0.2.1 is generally not supported as older versions will not provide accurate information due to the changes in consensus rules.
 
 Compatibility with Bitcoin ABC
 -------------------------------
 
-Wormhole Core is based on Bitcoin ABC v0.18.2.0-6a51d4f and can be used as replacement for Bitcoin ABC. Switching between Wormhole Core and Bitcoin ABC is fully supported at any time.
+Wormhole Core is based on Bitcoin ABC v0.18.2-6a51d4f and can be used as replacement for Bitcoin ABC. Switching between Wormhole Core and Bitcoin ABC is fully supported at any time.
 
 ===============
 
-Add new function to issue ERC721 Property
+Add new RPC interface to ERC721 feature
 ----------------------------------
 
-Add new function to issue ERC721 property were added Wormhole Core 0.2.0, As shown below:
+Add RPC interface whc_ownerOfERC721Token
 
-- A new txtype(`WHC_TYPE_ERC721`) and a enumeration type(`ERC721Action`) has been added ro support the new function.
+Fix some issue about ERC721
 
-- Add a series of RPC method to Issue ERC721 property and token.
-
-The `Wormhole 0.2.0` node is compatible with the `Bitcoin-Abc 0.18.2` version.
+The `Wormhole 0.2.1` node is compatible with the `Bitcoin-Abc 0.18.2` version.
 
 Change log
 ==========

src/omnicore/doc/release-notes/wormhole-0.2.1-release-notes.md

@@ -0,0 +1,80 @@
+Wormhole v0.2.1
+===================
+
+v0.2.1 is a pre-release
+
+Please report bugs using the issue tracker on GitHub:
+
+  https://github.com/copernet/wormhole/issues
+
+Table of contents
+=================
+
+- [wormhole v0.2.1](#wormhole-core-v021)
+- [Upgrading and downgrading](#upgrading-and-downgrading)
+  - [How to upgrade](#how-to-upgrade)
+  - [Downgrading](#downgrading)
+  - [Compatibility with Bitcoin ABC](#compatibility-with-bitcoin-abc)
+- [Notable changes](#notable-changes)
+  - [Add new RPC interface to ERC721 feature](#Add new RPC interface to ERC721 feature)
+- [Change log](#change-log)
+- [Credits](#credits)
+- [Document](#document)
+
+Upgrading and downgrading
+=========================
+
+How to upgrade
+--------------
+
+If you are running Bitcoin ABC or an older version of Wormhole Core, shut it down.
+
+`wormhole-cli stop`
+
+when you complie successfully and start the client using the following command at the first time:
+`wormholed -daemon -startclean=1`
+
+You can just use `wormhole -daemon` to restart the client after you have run successfully. 
+
+During the first startup historical Wormhole transactions are reprocessed and Wormhole Core will not be usable for approximately 15 minutes up to two hours. The progress of the initial scan is reported on the console, the GUI and written to the `debug.log`. The scan may be interrupted, but can not be resumed, and then needs to start from the beginning.
+
+Downgrading
+-----------
+
+Downgrading to an Wormhole Core version prior 0.2.1 is generally not supported as older versions will not provide accurate information due to the changes in consensus rules.
+
+Compatibility with Bitcoin ABC
+-------------------------------
+
+Wormhole Core is based on Bitcoin ABC v0.18.2-6a51d4f and can be used as replacement for Bitcoin ABC. Switching between Wormhole Core and Bitcoin ABC is fully supported at any time.
+
+===============
+
+Add new RPC interface to ERC721 feature
+----------------------------------
+
+Add RPC interface whc_ownerOfERC721Token
+
+Fix some issue about ERC721
+
+The `Wormhole 0.2.1` node is compatible with the `Bitcoin-Abc 0.18.2` version.
+
+Change log
+==========
+
+Pull request made on this release :
+
+Credits
+=======
+
+Thanks to everyone who contributed to this release, and especially the Bitcoin ABC developers and Omni core developers for providing the foundation for Wormhole Core!
+
+Document
+========
+The following is the detailed wormhole document link:
+1. WhitePaper : https://github.com/copernet/spec/blob/master/wormhole-spec-en.md
+2. YellowPaper : https://github.com/copernet/spec/blob/master/wormhole-yellowpaper-en.md
+3. Wormhole-Spec : https://github.com/copernet/spec/blob/master/wormhole-spec-en.md
+4. RPC : https://github.com/copernet/spec/blob/master/wormhole-rpc-en.md
+5. Test-Manual : https://github.com/copernet/spec/blob/master/wormhole-testmanual-0.2.0-en.md
+

src/omnicore/rpc.cpp

@@ -2501,7 +2501,7 @@ UniValue whc_ownerOfERC721Token(const Config &config, const JSONRPCRequest &requ
     if (request.fHelp || request.params.size() != 3)
         throw runtime_error(
                 "whc_ownerOfERC721Token propertyid tokenid address\n"
-                        "\nReturns details for about the tokens or smart property to lookup.\n"
+                        "\nQuery whether the Token's owner is the specified address.\n"
                         "\nArguments:\n"
                         "1. propertyid           (string, required) the identifier of the ERC721 property\n"
                         "2. tokenid              (string, required) the identifier of the ERC721 token\n"