From 32a35dc739290ba04637f423d0000bd7459734cb Mon Sep 17 00:00:00 2001
From: Gauravc_GauravChauhan <gauravc@leewayhertz.com>
Date: Thu, 28 Apr 2022 19:32:33 +0530
Subject: [PATCH 1/5] XDC SDK

---
 .DS_Store                                | Bin 6148 -> 0 bytes
 .env                                     |   1 +
 .gitattributes                           |   2 -
 .gitignore                               |  50 ++++
 .vscode/settings.json                    |   5 +
 Base_API_Call.py                         |  47 ---
 EXECUTE_Test.py                          |  97 ------
 LICENCE.txt                              |   7 +
 MANIFEST.in                              |   1 +
 README.md                                | 252 ++++------------
 XDC3PYTHON/__init__.py                   |   0
 XDC3PYTHON/createAccount.py              |   9 +
 XDC3PYTHON/xrc20.py                      | 327 ++++++++++++++++++++
 XDC3PYTHON/xrc721.py                     | 290 ++++++++++++++++++
 __pycache__/Base_API_Call.cpython-37.pyc | Bin 753 -> 0 bytes
 __pycache__/Base_API_Call.cpython-39.pyc | Bin 1459 -> 0 bytes
 __pycache__/eth.cpython-39.pyc           | Bin 10414 -> 0 bytes
 __pycache__/net.cpython-39.pyc           | Bin 1221 -> 0 bytes
 __pycache__/tatum.cpython-39.pyc         | Bin 6317 -> 0 bytes
 __pycache__/web3.cpython-37.pyc          | Bin 1189 -> 0 bytes
 __pycache__/web3.cpython-39.pyc          | Bin 994 -> 0 bytes
 common/xrc20abi.json                     | 222 ++++++++++++++
 common/xrc721abi.json                    | 366 +++++++++++++++++++++++
 eth.py                                   | 213 -------------
 net.py                                   |  27 --
 setup.py                                 |  15 +
 tatum.py                                 | 195 ------------
 web3.py                                  |  17 --
 28 files changed, 1345 insertions(+), 798 deletions(-)
 delete mode 100644 .DS_Store
 create mode 100644 .env
 delete mode 100644 .gitattributes
 create mode 100644 .gitignore
 create mode 100644 .vscode/settings.json
 delete mode 100644 Base_API_Call.py
 delete mode 100644 EXECUTE_Test.py
 create mode 100644 LICENCE.txt
 create mode 100644 MANIFEST.in
 create mode 100644 XDC3PYTHON/__init__.py
 create mode 100644 XDC3PYTHON/createAccount.py
 create mode 100644 XDC3PYTHON/xrc20.py
 create mode 100644 XDC3PYTHON/xrc721.py
 delete mode 100644 __pycache__/Base_API_Call.cpython-37.pyc
 delete mode 100644 __pycache__/Base_API_Call.cpython-39.pyc
 delete mode 100644 __pycache__/eth.cpython-39.pyc
 delete mode 100644 __pycache__/net.cpython-39.pyc
 delete mode 100644 __pycache__/tatum.cpython-39.pyc
 delete mode 100644 __pycache__/web3.cpython-37.pyc
 delete mode 100644 __pycache__/web3.cpython-39.pyc
 create mode 100644 common/xrc20abi.json
 create mode 100644 common/xrc721abi.json
 delete mode 100644 eth.py
 delete mode 100644 net.py
 create mode 100644 setup.py
 delete mode 100644 tatum.py
 delete mode 100644 web3.py

diff --git a/.DS_Store b/.DS_Store
deleted file mode 100644
index 6aa4635bd3c01c98a46bb9c409a04f2f02cf6599..0000000000000000000000000000000000000000
GIT binary patch
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HcmV?d00001

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diff --git a/.env b/.env
new file mode 100644
index 0000000..1d00c4e
--- /dev/null
+++ b/.env
@@ -0,0 +1 @@
+NETWORK_URL = "https://rpc.apothem.network"
\ No newline at end of file
diff --git a/.gitattributes b/.gitattributes
deleted file mode 100644
index dfe0770..0000000
--- a/.gitattributes
+++ /dev/null
@@ -1,2 +0,0 @@
-# Auto detect text files and perform LF normalization
-* text=auto
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b24d71e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,50 @@
+# These are some examples of commonly ignored file patterns.
+# You should customize this list as applicable to your project.
+# Learn more about .gitignore:
+#     https://www.atlassian.com/git/tutorials/saving-changes/gitignore
+
+# Node artifact files
+node_modules/
+dist/
+
+# Compiled Java class files
+*.class
+
+# Compiled Python bytecode
+*.py[cod]
+
+# Log files
+*.log
+
+# Package files
+*.jar
+
+# Maven
+target/
+dist/
+
+# JetBrains IDE
+.idea/
+
+# Unit test reports
+TEST*.xml
+
+# Generated by MacOS
+.DS_Store
+
+# Generated by Windows
+Thumbs.db
+
+# Applications
+*.app
+*.exe
+*.war
+
+# Large media files
+*.mp4
+*.tiff
+*.avi
+*.flv
+*.mov
+*.wmv
+
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..8974519
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,5 @@
+{
+    "python.analysis.extraPaths": [
+        "./modules"
+    ]
+}
\ No newline at end of file
diff --git a/Base_API_Call.py b/Base_API_Call.py
deleted file mode 100644
index 16f8d91..0000000
--- a/Base_API_Call.py
+++ /dev/null
@@ -1,47 +0,0 @@
-import json
-import http.client
-
-class API:
-    def Call(call,payload,content,conn):
-        headers = { 'content-type': "application/json" }
-
-        conn.request(call, content, payload, headers)
-        res = conn.getresponse()
-        data = res.read()
-
-        return data.decode("utf-8")
-
-    def Request_formatter(JSON):
-        Item = json.loads(JSON)
-        jsonrpc = Item["jsonrpc"]
-        id = Item["id"]
-        result = Item["result"]
-
-        return result    
-
-    def Format(Call,Payload,Content,conn,form):
-        #Try 
-        if conn == "test":
-            conn = "test"
-            if form == "JSON":
-                return API.Call(Call,Payload,Content,conn)
-            else:
-                JSON = API.Call(Call,Payload,Content,conn)
-                return API.clientVersion_formatter(JSON)
-        
-        else:
-            if form == "JSON":
-                return API.Call(Call,Payload,Content,conn)
-            else:
-                JSON = API.Call(Call,Payload,Content,conn)
-                return API.Request_formatter(JSON)
-        #Except
-            ##ERROR Handling
-
-    def Tatum_Format():
-        print("Base API")
-
-    def Tatum_Request_Formater():
-        print("Base API")
-
-
diff --git a/EXECUTE_Test.py b/EXECUTE_Test.py
deleted file mode 100644
index e8812d9..0000000
--- a/EXECUTE_Test.py
+++ /dev/null
@@ -1,97 +0,0 @@
-from web3 import web3_Request
-from net import net_Request
-from eth import eth_Request
-from tatum import tatum_Request
-
-import hashlib 
-
-class Test:
-    def __init__(self):
-        print("---------------- Starting Web3 Test ----------------")
-        #self.web3_test()
-
-        print("---------------- Starting net Test ----------------")
-        #self.net_test()
-
-        print("---------------- Starting eth Test ----------------")
-        #self.eth_test()
-
-        print("---------------- Starting tatum Test ----------------")
-        self.tatum_test()
-
-
-    def web3_test(self):
-        String= "Q"
-        Hash =  hashlib.sha256(String.encode('utf-8')).hexdigest()
-        #print(Hash)
-
-        #print(web3_Request.clientVersion())
-        #print(web3_Request.sha3(Hash=Hash))
-
-    def net_test(self):
-        print("none")
-        #print(net_Request.version())
-        #print(net_Request.listening())
-        #print(net_Request.peerCount())
-        
-    def eth_test(self):
-        #print(int(eth_Request.protocolVersion(form="Text"),16))
-        #print(eth_Request.syncing(form="Text"))
-        #print(eth_Request.coinbase(form="Text"))
-        print(eth_Request.gasPrice(form="Text"))
-        print(eth_Request.accounts(form="Text"))
-        print(eth_Request.blockNumber(form="Text"))
-       
-
-        Addy = "0x438e0b511981FE8CF7283e981ca8c3394bB3646E"
-        #print(eth_Request.getBalance(Address=Addy,form="Text"))
-
-        #print(eth_Request.getTransactionCount(form="Text"))
-        #print(eth_Request.getBlockTransactionCountByHash(form="Text"))
-        #print(eth_Request.getBlockTransactionCountByNumber(form="Text"))
-        #print(eth_Request.getCode(form="Text"))
-        #print(eth_Request.call(form="Text"))
-        #print(eth_Request.estimateGas(form="Text"))
-        #print(eth_Request.getBlockByHash(form="Text"))
-        #print(eth_Request.getBlockByNumber(form="Text"))
-        #print(eth_Request.getBlockSignersByNumber(form="Text"))
-        #print(eth_Request.getBlockSignersByHash(form="Text"))
-        #print(eth_Request.getBlockFinalityByNumber(form="Text"))
-        #print(eth_Request.getBlockFinalityByHash(form="Text"))
-        #print(eth_Request.getCandidateStatus(form="Text"))
-        #print(eth_Request.getTransactionByHash(form="Text"))
-        #print(eth_Request.getTransactionByBlockHashAndIndex(form="Text"))
-        #print(eth_Request.getTransactionByBlockNumberAndIndex(form="Text"))
-        #print(eth_Request.getTransactionReceipt(form="Text"))
-        
-        #ERRORS
-        #print(eth_Request.getCandidates())
-        #print(eth_Request.sendRawTransaction())
-        #print(eth_Request.getStorageAt())
-        #print(eth_Request.sign())
-        #print(eth_Request.sendTransaction())
-
-    def tatum_test(self):
-        API_KEY = "b56527b4-1db2-4842-b388-357a7ad44d2a"
-        Seed = "Quincy_JOJONONONO"
-        Hash = "0xead075790098c7261e9fad995183fcc6eb4c3102f22c2507fc0fc25bd2cd0aa9"
-        Address = "xdce4c4febe1cb34c3490167c163c9ed92049b32b5c" 
-        xpub = tatum_Request.Generate_XDC_Wallet(Seed,API_KEY,form="Text")
-        
-        print(xpub)
-        print(tatum_Request.Generate_XDC_Wallet_EPK(API_KEY,xpub,index=0))
-        print(tatum_Request.Generate_XDC_Private_key(API_KEY,Seed,form="Text"))
-        print(tatum_Request.Web3_HTTP_Driver(API_KEY,form="Text"))
-        print(tatum_Request.Current_Block_Number(API_KEY,form="Text"))
-        print(tatum_Request.XDC_Block_by_Hash(API_KEY,Hash,form="Text"))
-        print(tatum_Request.XDC_Account_Balance(API_KEY,Address,form="Text"))
-        blockHash,blockNumber,From,gas,gasPrice,input,nonce,To,transactionIndex,value,contractAddress,cumulativeGasUsed,gasUsed,logs = tatum_Request.XDC_Transaction(API_KEY,Hash,form="Text")
-
-        print(tatum_Request.Count_Outgoing_XDC_Transactions(API_KEY,Address,form="Text"))
-
-        #print(tatum_Request.Send_XDC_ERC20(API_KEY,form="Text"))
-        #print(tatum_Request.Estimate_XDC_Transaction_Fees(API_KEY,form="Text"))
-
-        print(blockNumber)
-if __name__ == "__main__":
-    Test()
diff --git a/LICENCE.txt b/LICENCE.txt
new file mode 100644
index 0000000..1ef92da
--- /dev/null
+++ b/LICENCE.txt
@@ -0,0 +1,7 @@
+Copyright © 2022 XDC Foundation
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
\ No newline at end of file
diff --git a/MANIFEST.in b/MANIFEST.in
new file mode 100644
index 0000000..e5bb1bf
--- /dev/null
+++ b/MANIFEST.in
@@ -0,0 +1 @@
+global-include *.txt *.py *.md
\ No newline at end of file
diff --git a/README.md b/README.md
index 7f1b98b..0cc0d3c 100644
--- a/README.md
+++ b/README.md
@@ -1,234 +1,86 @@
-# **XDC Python SDK V1.0**
-
-### **Summary:**
-
-This is a Python SDK for XinFin API published by Quincy@xinfin.org
-
-##### **Haxidecimal Outputs**
-
-All hexadecimal need to be converted into **integers**
-
-##### **JSON Schema**
-
-- By default all functions output in JSON so i implemeted a simplified output for variable just place class(form = "Text")  for vatiabble output as string | Default output "JSON"
-
-- The JSON Schema outputed by all the functions is this:
-
-```json
-{
-  "jsonrpc":"2.0",
-  "id":1,
-  "result":EXAMPLE_RESULT
-}
+# XDC3PYTHON
 ```
-
-------
-
-
-
-## **web3**
-
-#### **POST /clientVersion**
-
-```python
-Version = web3_Request.clientVersion()
-print(Version)
-##Output {"jsonrpc":"2.0","id":67,"result":"50"}
+XDC3PYTHON SDK with support for smart contracts, XRC20 & XRC721.
 ```
 
-Returns the current client version.
-
-**Parameters**
-
-**form** =  "Text"  for varriabled output as string | Default output "JSON"
-
-**Returns**
-
-`String` - The current client version
-
-#### **POST /sha3**
-
-```python
-import hashlib 
-String= "Q"
-Hash =  hashlib.sha256(String.encode('utf-8')).hexdigest()
-
-print(web3_Request.sha3(Hash=Hash,form="Text"))
-##Output 0x6d1223fcb20bababbf18827dbe3ac76b13f03e2.........
+# Usage
 ```
-
-Returns Keccak-256 (not the standardized SHA3-256) of the given data.
-
-**Parameters**
-
-​	**form** =  "Text"  for vatiabble output as string | Default output JSON
-
-​	**Hash** - the Hash to convert into a SHA3 hash 
-
-**Returns**`DATA` - The SHA3 result of the given string.
-
-## **net**
-
-#### **POST /version**
-
-```python
-Version = net_Request.version(form="Text")
-print(Version)
-##Output 50
+run this command pip install XDC3PYTHON to add dependecies.
 ```
 
-Returns the current network id.
-
-**Parameters**
-
-none
-
-**Returns**
-
-- `String` - The current network id.
-    - `"50"`: XinFin Mainnet
-    - `"89"`: XinFin Testnet
-
-#### **POST /listening**
-
-```python
-Listening = net_Request.listening(form="Text")
-print(Listening)
-##Output True
+[dependencies]
 ```
-
-Returns `true` if client is actively listening for network connections.
-
-**Parameters**
-
-none
-
-**Returns**
-
-- `Boolean` - `true` when listening, otherwise `false`.
-
-
-
-#### **POST /peerCount**
-
-```python
-Peer = net_Request.peerCount(form="Text")
-print(Peer)
-##Output 0x8
+XDC3PYTHON = "1.0.0"
 ```
 
-Returns number of peers currently connected to the client.
-
-**Parameters**
-
-none
-
-**Returns**
-
-- `QUANTITY` - integer of the number of connected peers.
+This SDK supports following Read & Write operations:-
 
 
-
-## **eth**
-
-#### **POST /protocolVersion**
-
-```python
-ETH_Version = eth_Request.protocolVersion(form="Text")
-print(int(ETH_Version,16)
-##Output 63
 ```
 
-Returns the current ethereum protocol version.
-
-**Parameters**
-
-none
+  |    XRC20 Token: Read methods                            |   XRC20 Token: Write methods                          |
+  |                                                         |                                                       | 
+  |     name()                                              |   approve(receiverAddress , amount)                   |
+  |     symbol()                                            |   transfer(recipient, amount)                         |
+  |     decimal()                                           |   transferFrom(sender, recipient, amount)             |
+  |     totalSupply()                                       |   increaseAllowance(spender, addedValue)              |
+  |     balanceOf(account)                                  |   decreaseAllowance(spender, subtractedValue)         |
+  |     allowance(owner, spender)                           |                                                       |
+  |                                                         |                                                       |
+                                            
+  |    XRC721 Token: Read methods                           |   XRC721 Token: Write methods                         |
+  |                                                         |                                                       |
+  |     name()                                              |   setApprovalForAll(spenderAddress, booleanValue)     |
+  |     symbol()                                            |   approve(spenderAddress , tokenId)                   |
+  |     totalSupply()                                       |   transferFrom(receiver, tokenId)                     |
+  |     balanceOf(ownerAddress)                             |   safeTransferFrom(receiver, tokenId)                 |
+  |     ownerOf(tokenId)                                    |                                                       |
+  |     tokenURI(tokenId)                                   |                                                       |
+  |     tokenByIndex(index)                                 |                                                       |
+  |     tokenOfOwnerByIndex(ownerAddress,index)             |                                                       |
+  |     supportInterface(interfaceId)                       |                                                       |
+  |     getApproved(tokenId)                                |                                                       |
+  |     isApprovedForAll(ownerAddress,spenderAddr)          |                                                       |
+  |                                                         |                                                       |
 
-**Returns**
-
-- `String` - The current ethereum protocol version
-
-
-
-#### **POST /syncing**
-
-```python
-Sync = eth_Request.syncing(form="Text")
-print(Sync)
-##Output False
 ```
 
-Returns an object with data about the sync status or false.
-
-**Parameters**
-
-none
-
-**Returns**
-
-- `Object|Boolean`, An object with sync status data or FALSE, when not syncing:
-    - `startingBlock`: `QUANTITY` - The block at which the import started (will only be reset, after the sync reached his head)
-    - `currentBlock`: `QUANTITY` - The current block, same as eth_blockNumber
-    - `highestBlock`: `QUANTITY` - The estimated highest block
-
-
-
-#### **POST /coinbase**
-
-```python
-coinbase = eth_Request.coinbase(form="Text")
-print(coinbase)
-##Output xdc3056a8bff9a17b12d08f1837d0b44cf1e2018fbe
+# Environment Variable
 ```
-
-Returns the client coinbase address. **Parameters** none **Returns**
-
-- `DATA`, 20 bytes - the current coinbase address.
-
-
-
-#### **POST /gasPrice**
-
-```python
-gasPrice = eth_Request.gasPrice(form="Text")
-print(gasPrice)
-##Output 0x9c4
+Create a .env file in the root directory of the Python project to put the wallet and endpoint information in like so: NETWORK_URL = "https://rpc.apothem.network"
 ```
 
-Returns the current price per gas in wei. **Parameters** none **Returns**
-
-- `QUANTITY` - integer of the current gas price in wei.
+Example for XRC20.
+```
 
+from XDC3PYTHON import XRC20
 
 
-#### **POST /accounts**
+if __name__=="__main__":
 
+    token = input('Enter token address: ')
+    a = XRC20.name(token)
+    print(a)
 ```
-POST /accounts
-```
-
-Returns a list of addresses owned by client.
 
-**Parameters**
+This example returns name of the specified address.
 
-none
+Example for XRC721.
+```
 
-**Returns**
+from XDC3PYTHON import XRC721
 
-- `Array of DATA`, 20 Bytes - addresses owned by the client
 
+if __name__=="__main__":
 
+    token = input('Enter token address: ')
+    a = XRC721.symbol(token)
+    print(a)
+```
 
-#### **POST /blockNumber**
+This example returns symbol of the specified address.
 
+# Transports
 ```
-POST /blockNumber
+ HTTP transport
 ```
-
-Returns the number of most recent block. **Parameters** none **Returns**
-
-- `QUANTITY` - integer of the current block number the client is on.
-
-
-
diff --git a/XDC3PYTHON/__init__.py b/XDC3PYTHON/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/XDC3PYTHON/createAccount.py b/XDC3PYTHON/createAccount.py
new file mode 100644
index 0000000..c3d01c6
--- /dev/null
+++ b/XDC3PYTHON/createAccount.py
@@ -0,0 +1,9 @@
+from bitcoin import random_key
+
+
+
+# Gets private key of wallet to create new account.
+
+def createAccount():
+    privateKey = random_key()
+    return privateKey
\ No newline at end of file
diff --git a/XDC3PYTHON/xrc20.py b/XDC3PYTHON/xrc20.py
new file mode 100644
index 0000000..eab168f
--- /dev/null
+++ b/XDC3PYTHON/xrc20.py
@@ -0,0 +1,327 @@
+from web3 import Web3
+from web3._utils.encoding import (
+    hexstr_if_str,
+    to_bytes,
+)
+from decouple import config
+import json
+
+
+rpcUrl = config('NETWORK_URL')
+
+# HTTPProvider:
+w3 = Web3(Web3.HTTPProvider(rpcUrl))
+
+# path of abi file
+with open('./common/xrc20abi.json') as abiJson:
+    xrc20abi = json.load(abiJson)
+
+# This is a class which consists all the methods as per XRC20 standards.
+
+class XRC20:
+
+    # Gets the Name of the specified address.
+    # Token address is required as argument.
+
+    def name(tokenAddr):
+        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc20abi)
+        name = contractInstance.functions.name().call()
+        return name
+
+    # Gets method returns total supply of token.
+    # Token address is required as argument.
+
+    def totalSupply(tokenAddr):
+        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc20abi)
+        totalSupply = contractInstance.functions.totalSupply().call()
+        totalSupply = w3.fromWei(totalSupply, 'ether')
+        return totalSupply
+
+    # Gets the Decimal of the specified address.
+    # Token address is required as argument.
+
+    def decimal(tokenAddr):
+        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc20abi)
+        decimal = contractInstance.functions.decimals().call()
+        return decimal
+
+    # Gets the Symbol of the specified address.
+    # Token address is required as argument.
+
+    def symbol(tokenAddr):
+        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc20abi)
+        symbol = contractInstance.functions.symbol().call()
+        return symbol
+
+    # Gets the balance of the specified address.
+    # token address, owner address are required as arguments.
+
+    def balanceOf(tokenAddr, ownerAddress):
+        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc20abi)
+        owner = Web3.toChecksumAddress(ownerAddress)
+        balance = contractInstance.functions.balanceOf(owner).call()
+        return w3.fromWei(balance, 'ether')
+
+    # This method returns how much allowance spender have from owner.
+    # This function required three arguments.
+    # owner address, spender address, token address.
+
+    def allowance(tokenAddr, ownerAddress, spenderAddress):
+        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc20abi)
+        owner = Web3.toChecksumAddress(ownerAddress)
+        spender = Web3.toChecksumAddress(spenderAddress)
+        Allowance = contractInstance.functions.allowance(owner, spender).call()
+        return w3.fromWei(Allowance, 'ether')
+
+    # Transfer XDC for a specified address.
+    # This function requires following arguments.
+    # private key, recipient address, amount.
+
+    def transferXDC(ownerAddress, receiverAddress, ownerPrivateKey, amount):
+
+        owner = Web3.toChecksumAddress(ownerAddress)
+        spender = Web3.toChecksumAddress(receiverAddress)
+        amount = w3.toWei(amount, 'ether')
+
+        nonce = w3.eth.getTransactionCount(owner)
+        gasPrice = w3.eth.gas_price
+        estimateGas = w3.eth.estimateGas({
+            'to': spender,
+            'from': owner,
+            'value': amount
+        })
+
+        tx = {
+            'nonce': nonce,
+            'to': spender,
+            'value': amount,
+            'gas': estimateGas,
+            'gasPrice': gasPrice,
+        }
+
+        signedTx = w3.eth.account.signTransaction(tx, ownerPrivateKey)
+
+        txHash = w3.eth.sendRawTransaction(signedTx.rawTransaction)
+        return w3.toHex(txHash)
+
+    # Transfer token for a specified address.
+    # This function requires following arguments.
+    # ownerAddress, ownerPrivateKey, receiver address, token address, amount.
+
+    def transferToken(tokenAddr, ownerAddress, ownerPrivateKey,  receiverAddress, amount):
+
+        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc20abi)
+
+        owner = Web3.toChecksumAddress(ownerAddress)
+        spender = Web3.toChecksumAddress(receiverAddress)
+
+        balance = contractInstance.functions.balanceOf(owner).call()
+
+        if amount > balance:
+            return "amount exceeds balance"
+
+        amount = w3.toWei(amount, 'ether')
+
+        Transfer = contractInstance.functions.transfer(spender, amount)
+
+        hexData = Transfer._encode_transaction_data()
+
+        data = hexstr_if_str(to_bytes, hexData)
+
+        estimateGas = Transfer.estimateGas(
+            {
+                'from': owner,
+            }
+        )
+
+        nonce = w3.eth.getTransactionCount(owner)
+        gasPrice = w3.eth.gas_price
+
+        tx = {
+            'nonce': nonce,
+            'to': tokenAddr,
+            'data': data,
+            'gas': estimateGas,
+            'gasPrice': gasPrice,
+        }
+
+        signedTx = w3.eth.account.signTransaction(tx, ownerPrivateKey)
+
+        txHash = w3.eth.sendRawTransaction(signedTx.rawTransaction)
+        return w3.toHex(txHash)
+
+    # Approve the passed address to spend the specified amount of tokens on behalf of owner.
+    # This function required arguments.
+    # ownerAddress, ownerPrivateKey, spenderAddress, tokenAddr, amount.
+
+    def approve(tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress, amount):
+        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc20abi)
+
+        owner = Web3.toChecksumAddress(ownerAddress)
+        spender = Web3.toChecksumAddress(spenderAddress)
+
+        balance = contractInstance.functions.balanceOf(owner).call()
+        allowanceAmount = contractInstance.functions.allowance(
+            owner, spender).call()
+
+        if amount > balance and allowanceAmount > balance:
+            return "amount exceeds balance"
+
+        amount = w3.toWei(amount, 'ether')
+
+        approveData = contractInstance.functions.approve(spender, amount)
+
+        hexData = approveData._encode_transaction_data()
+
+        data = hexstr_if_str(to_bytes, hexData)
+
+        estimateGas = approveData.estimateGas()
+
+        nonce = w3.eth.getTransactionCount(owner)
+
+        gasPrice = w3.eth.gas_price
+
+        tx = {
+            'nonce': nonce,
+            'to': tokenAddr,
+            'data': data,
+            'gas': estimateGas,
+            'gasPrice': gasPrice,
+        }
+
+        signedTx = w3.eth.account.signTransaction(tx, ownerPrivateKey)
+
+        txHash = w3.eth.sendRawTransaction(signedTx.rawTransaction)
+        return w3.toHex(txHash)
+
+    # increase the amount of tokens that an owner allowed to a spender.
+    # This function required arguments.
+    # owner address, ownerPrivateKey, spender address, token address, amount.
+
+    def increaseAllowance(tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress, amount):
+
+        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc20abi)
+
+        owner = Web3.toChecksumAddress(ownerAddress)
+        spender = Web3.toChecksumAddress(spenderAddress)
+
+        balance = contractInstance.functions.balanceOf(owner).call()
+
+        allowanceAmount = contractInstance.functions.allowance(
+            owner, spender).call()
+
+        allowanceAmount = w3.fromWei(allowanceAmount, 'ether')
+
+        totalAmount = allowanceAmount + amount
+
+        if totalAmount > balance:
+            return "amount exceeds balance"
+
+        totalAmount = w3.toWei(totalAmount, 'ether')
+
+        Transfer = contractInstance.functions.approve(spender, totalAmount)
+
+        hexData = Transfer._encode_transaction_data()
+
+        data = hexstr_if_str(to_bytes, hexData)
+
+        estimateGas = Transfer.estimateGas()
+
+        nonce = w3.eth.getTransactionCount(owner)
+        gasPrice = w3.eth.gas_price
+
+        tx = {
+            'nonce': nonce,
+            'to': tokenAddr,
+            'data': data,
+            'gas': estimateGas,
+            'gasPrice': gasPrice,
+        }
+        signedTx = w3.eth.account.signTransaction(tx, ownerPrivateKey)
+
+        txHash = w3.eth.sendRawTransaction(signedTx.rawTransaction)
+        return w3.toHex(txHash)
+
+    # decrease the amount of tokens that an owner allowed to a spender.
+    # This function required arguments.
+    # owner address, ownerPrivateKey, spender address, token address, amount.
+
+    def decreaseAllowance(tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress, amount):
+        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc20abi)
+
+        owner = Web3.toChecksumAddress(ownerAddress)
+        spender = Web3.toChecksumAddress(spenderAddress)
+
+        allowanceAmount = contractInstance.functions.allowance(
+            owner, spender).call()
+        allowanceAmount = (w3.fromWei(allowanceAmount, 'ether'))
+
+        if allowanceAmount >= amount:
+            totalAmount = allowanceAmount - amount
+        else:
+            totalAmount = amount - allowanceAmount
+
+        totalAmount = w3.toWei(totalAmount, 'ether')
+
+        approveData = contractInstance.functions.approve(spender, totalAmount)
+
+        hexData = approveData._encode_transaction_data()
+
+        data = hexstr_if_str(to_bytes, hexData)
+
+        estimateGas = approveData.estimateGas()
+
+        nonce = w3.eth.getTransactionCount(owner)
+        gasPrice = w3.eth.gas_price
+
+        tx = {
+            'nonce': nonce,
+            'to': tokenAddr,
+            'data': data,
+            'gas': estimateGas,
+            'gasPrice': gasPrice,
+        }
+        signedTx = w3.eth.account.signTransaction(tx, ownerPrivateKey)
+
+        txHash = w3.eth.sendRawTransaction(signedTx.rawTransaction)
+        return w3.toHex(txHash)
+
+    # Transfer tokens from one address to another.
+    # This function requires following arguments.
+    # owner address, spenderPrivateKey, spender address, receiver address, token address, amount.
+
+    def transferFrom(tokenAddr, ownerAddress,  spenderPrivateKey,  spenderAddress, receiver, amount):
+
+        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc20abi)
+
+        owner = Web3.toChecksumAddress(ownerAddress)
+        receiverAddres = Web3.toChecksumAddress(receiver)
+        spender = Web3.toChecksumAddress(spenderAddress)
+
+        amount = w3.toWei(amount, 'ether')
+
+        transferData = contractInstance.functions.transferFrom(
+            owner, receiverAddres, amount)
+
+        estimateGas = transferData.estimateGas({
+            'from': spender,
+        })
+
+        hexData = transferData._encode_transaction_data()
+
+        data = hexstr_if_str(to_bytes, hexData)
+
+        nonce = w3.eth.getTransactionCount(spender)
+        gasPrice = w3.eth.gas_price
+
+        tx = {
+            'nonce': nonce,
+            'to': tokenAddr,
+            'data': data,
+            'gas': estimateGas,
+            'gasPrice': gasPrice,
+        }
+        signedTx = w3.eth.account.signTransaction(tx, spenderPrivateKey)
+
+        txHash = w3.eth.sendRawTransaction(signedTx.rawTransaction)
+        return w3.toHex(txHash)
diff --git a/XDC3PYTHON/xrc721.py b/XDC3PYTHON/xrc721.py
new file mode 100644
index 0000000..4852467
--- /dev/null
+++ b/XDC3PYTHON/xrc721.py
@@ -0,0 +1,290 @@
+from web3 import Web3
+from web3._utils.encoding import (
+    hexstr_if_str,
+    to_bytes,
+)
+from decouple import config
+import json
+
+
+rpcUrl = config('NETWORK_URL')
+
+# HTTPProvider:
+w3 = Web3(Web3.HTTPProvider(rpcUrl))
+
+# path of abi file
+with open('./common/xrc721abi.json') as abiJson:
+    xrc721abi = json.load(abiJson)
+
+# This is a class which consists all the methods as per XRC721 standards.
+
+class XRC721:
+
+    # Gets the Name of the specified address.
+    # token address required as an argument.
+
+    def name(tokenAddr):
+        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc721abi)
+        result = contractInstance.functions.name().call()
+        return result
+
+    # Gets the Symbol of the specified address.
+    # token address required as an argument.
+
+    def symbol(tokenAddr):
+        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc721abi)
+        result = contractInstance.functions.symbol().call()
+        return result
+
+    # Gets the owner of an NFT.
+    # required arguments.
+    # token address, token id.
+
+    def ownerOf(tokenAddr, tokenId):
+        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc721abi)
+        result = contractInstance.functions.ownerOf(tokenId).call()
+        return result
+
+    # Gets the Totalsupply of the specified address.
+    # token address required as an argument.
+    
+    def totalSupply(tokenAddr):
+        token = Web3.toChecksumAddress(tokenAddr)
+        contractInstance = w3.eth.contract(address=token, abi=xrc721abi)
+        result = contractInstance.functions.totalSupply().call()
+        resultt = str(result)
+        return resultt
+
+    # Gets the balance of the specified address.
+    # reuired arguments
+    # token address, owner address.
+
+    def balanceOf(tokenAddr, ownerAddress):
+        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc721abi)
+        owner = Web3.toChecksumAddress(ownerAddress)
+        result = contractInstance.functions.balanceOf(owner).call()
+        return result
+
+    # A distinct Uniform Resource Identifier (URI) for a given asset.
+    # Gets URI of a token.
+    # required arguments
+    # tokenId The identifier for an NFT.
+    # address of the token.
+    
+    def tokenURI(tokenAddr, tokenId):
+        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc721abi)
+        result = contractInstance.functions.tokenURI(tokenId).call()
+        return result
+
+    # Enumerate NFTs assigned to an owner.
+    # tokenAddress An address for whom to query.
+    # IndexNO A counter less than `totalSupply()`.
+    # The token identifier for the `index`th NFT assigned to `owner`.
+
+    def tokenByIndex(tokenAddr, index):
+        token = Web3.toChecksumAddress(tokenAddr)
+        contractInstance = w3.eth.contract(address=token, abi=xrc721abi)
+        result = contractInstance.functions.tokenByIndex(index).call()
+        return result
+
+    # Enumerate NFTs assigned to an owner.
+    # The token identifier for the `index`th NFT assigned to `owner`.
+    # required arguments.
+    # owner address, token address, token index.
+    
+    def tokenofOwnerByIndex(tokenAddr, ownerAddress, index):
+        token = Web3.toChecksumAddress(tokenAddr)
+        contractInstance = w3.eth.contract(address=token, abi=xrc721abi)
+        owner = Web3.toChecksumAddress(ownerAddress)
+        result = contractInstance.functions.tokenOfOwnerByIndex(
+            owner, index).call()
+        return result
+
+    # Query if a contract implements an interface.
+    # tokenAddress An address for whom to query and x_bytes The interface identifier.
+    # `true` if the contract implements `interfaceID` andinterfaceID` is not 0xffffffff, `false` otherwise.
+    #  required arguments.
+    # token address, interface id.
+
+    def supportInterface(tokenAddr, interfaceId):
+        token = Web3.toChecksumAddress(tokenAddr)
+        contractInstance = w3.eth.contract(address=token, abi=xrc721abi)
+        result = contractInstance.functions.supportsInterface(
+            interfaceId).call()
+        return result
+
+    # The approved address for a token ID, or zero if no address set Reverts if the token ID does not exist.
+    # required arguments.
+    # token address, tokenId.
+
+    def getApproved(tokenAddr, tokenId):
+        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc721abi)
+        result = contractInstance.functions.getApproved(tokenId).call()
+        return result
+
+    # Tells whether an operator is approved by a given owner.
+    # required arguments.
+    # owner address, spender address, token address.
+
+    def isApprovedForAll(tokenAddr, ownerAddress, spenderAddress):
+        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc721abi)
+        owner = Web3.toChecksumAddress(ownerAddress)
+        spender = Web3.toChecksumAddress(spenderAddress)
+        result = contractInstance.functions.isApprovedForAll(
+            owner, spender).call()
+        return result
+
+    # Change or reaffirm the approved address for an NFT.
+    # The zero address indicates there is no approved address.
+    # Throws unless `owner` is the current NFT owner, or an authorized.
+    # required arguments.
+    # tokenAddress, owner address, ownerPrivateKey, spenderAddress, tokenID.
+
+    def approve(tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress, tokenId):
+        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc721abi)
+
+        owner = Web3.toChecksumAddress(ownerAddress)
+        spender = Web3.toChecksumAddress(spenderAddress)
+
+        approveData = contractInstance.functions.approve(spender, tokenId)
+
+        hexData = approveData._encode_transaction_data()
+
+        data = hexstr_if_str(to_bytes, hexData)
+
+        estimateGas = approveData.estimateGas({
+            'from': owner,
+        })
+
+        nonce = w3.eth.getTransactionCount(owner)
+
+        gasPrice = w3.eth.gas_price
+
+        tx = {
+            'nonce': nonce,
+            'to': tokenAddr,
+            'data': data,
+            'gas': estimateGas,
+            'gasPrice': gasPrice,
+        }
+
+        signedTx = w3.eth.account.signTransaction(tx, ownerPrivateKey)
+
+        txHash = w3.eth.sendRawTransaction(signedTx.rawTransaction)
+        return w3.toHex(txHash)
+
+    # Enable or disable approval for a third party ("operator") to manage all of `Owner`'s assets
+    # Emits the ApprovalForAll event. The contract MUST allow multiple operators per owner.
+    # required arguments.
+    # token address, owner address, ownerPrivateKey, sepnder address, tokenId.
+     
+    def setApprovalForAll(tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress, boolValue):
+        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc721abi)
+
+        owner = Web3.toChecksumAddress(ownerAddress)
+        spender = Web3.toChecksumAddress(spenderAddress)
+
+        approveData = contractInstance.functions.setApprovalForAll(
+            spender, boolValue)
+
+        hexData = approveData._encode_transaction_data()
+
+        data = hexstr_if_str(to_bytes, hexData)
+
+        estimateGas = approveData.estimateGas({
+            'from': owner,
+        })
+
+        nonce = w3.eth.getTransactionCount(owner)
+
+        gasPrice = w3.eth.gas_price
+
+        tx = {
+            'nonce': nonce,
+            'to': tokenAddr,
+            'data': data,
+            'gas': estimateGas,
+            'gasPrice': gasPrice,
+        }
+
+        signedTx = w3.eth.account.signTransaction(tx, ownerPrivateKey)
+
+        txHash = w3.eth.sendRawTransaction(signedTx.rawTransaction)
+        return w3.toHex(txHash)
+
+    # Transfer ownership of an NFT -- THE CALLER IS RESPONSIBLE
+    # to confirm that `reciever Address` is capable of receiving NFTs or else they may be permanently lost.
+    # required arguments.
+    # token address, owner address, spender address, spenderPrivateKey, receiver address, tokenId.
+
+    def transferFrom(tokenAddr, ownerAddress, spenderAddress,  spenderPrivateKey, receiver, tokenId):
+
+        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc721abi)
+
+        owner = Web3.toChecksumAddress(ownerAddress)
+        receiverAddres = Web3.toChecksumAddress(receiver)
+        spender = Web3.toChecksumAddress(spenderAddress)
+
+        transferData = contractInstance.functions.transferFrom(
+            owner, receiverAddres, tokenId)
+
+        estimateGas = transferData.estimateGas({
+            'from': spender,
+        })
+
+        hexData = transferData._encode_transaction_data()
+
+        data = hexstr_if_str(to_bytes, hexData)
+
+        nonce = w3.eth.getTransactionCount(spender)
+        gasPrice = w3.eth.gas_price
+
+        tx = {
+            'nonce': nonce,
+            'to': tokenAddr,
+            'data': data,
+            'gas': estimateGas,
+            'gasPrice': gasPrice,
+        }
+        signedTx = w3.eth.account.signTransaction(tx, spenderPrivateKey)
+
+        txHash = w3.eth.sendRawTransaction(signedTx.rawTransaction)
+        return w3.toHex(txHash)
+
+    # Transfers the ownership of an NFT from one address to another address.
+    # required arguments.
+    # token address, owner address, spender address, spenderPrivateKey, receiver address, tokenId. 
+
+    def safeTransferFrom(tokenAddr, ownerAddress, spenderAddress,  spenderPrivateKey, receiver, tokenId):
+
+        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc721abi)
+
+        owner = Web3.toChecksumAddress(ownerAddress)
+        receiverAddres = Web3.toChecksumAddress(receiver)
+        spender = Web3.toChecksumAddress(spenderAddress)
+
+        transferData = contractInstance.functions.safeTransferFrom(
+            owner, receiverAddres, tokenId)
+
+        estimateGas = transferData.estimateGas({   
+            'from': spender,
+        })
+
+        hexData = transferData._encode_transaction_data()
+
+        data = hexstr_if_str(to_bytes, hexData)
+
+        nonce = w3.eth.getTransactionCount(spender)
+        gasPrice = w3.eth.gas_price
+
+        tx = {
+            'nonce': nonce,
+            'to': tokenAddr,
+            'data': data,
+            'gas': estimateGas,
+            'gasPrice': gasPrice,
+        }
+        signedTx = w3.eth.account.signTransaction(tx, spenderPrivateKey)
+
+        txHash = w3.eth.sendRawTransaction(signedTx.rawTransaction)
+        return w3.toHex(txHash)
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zoD-FJjrN545WL7<Iq?dJ12ah*+zVsvXl8bH=9_QVeyui7Kz@At^Wi%q<R?01F~C`e
zmEHy=iKG!3Qjb!!S;Rc!DUpWc$3*h4%;S=EN!|Pfxuj0D@u>5x9iUT|S;;0uL*h|M
zJQf<e{KS;>luFiPlakc4%28?d3~9;AG4(3ahBkA$dJukG6|cj+{V>h)YiblU4hL~>
z5I5p5J4n<g&7XI-+5rqU6BDcotQM^FCMZeAOtP^djWN&22`yN`3!@+fJvE^VZ)@J!
z>Tc(AuKPJu=^%;owJ*+Yn#9o0X*zcsE6%br46}YB!G+G^JP*PnU-`q-X}){E><nQ0
z{)6!uQ;5g2o+N7MXLVEaAc<qmd*Ex{@}o#sT1lLRai%LB|0qg)c}7$f4*hoBHz|N{
zU%4-nz>i?|QR2ScXo=1d^p8b%<AvC{(^zqlna1cy*MevOg?6UMaro2*MJUIQ<u}R{
zHZCP=65v%`hy})sI0qac&H&=LGzzvv#^!`PqcDNKf8;4_nOm-#_Wjj-{XfJ_fM8ac
zHfQDVR_a`kcW<l^Mcq;eMByNsZ~AFp&7qGkSuLPKuBNI6mgZO%W2M<`mM>nK9dp`s
zTiZg!{xB3m&kHe3<bH&9RfxTPKRVyx{VW@K)|4*q>gM)#rwdmWhd~DKLtVl4i!%(D
z(I_O9BN$XRU8+nXb<?Xo_R~<nKO^uFOkc?Yb~?WobsbCM@zQ{k;*%-uwJF+%^rCo`
G+Uzg<_3C~A

diff --git a/common/xrc20abi.json b/common/xrc20abi.json
new file mode 100644
index 0000000..668d697
--- /dev/null
+++ b/common/xrc20abi.json
@@ -0,0 +1,222 @@
+[
+    {
+        "constant": true,
+        "inputs": [],
+        "name": "name",
+        "outputs": [
+            {
+                "name": "",
+                "type": "string"
+            }
+        ],
+        "payable": false,
+        "stateMutability": "view",
+        "type": "function"
+    },
+    {
+        "constant": false,
+        "inputs": [
+            {
+                "name": "_spender",
+                "type": "address"
+            },
+            {
+                "name": "_value",
+                "type": "uint256"
+            }
+        ],
+        "name": "approve",
+        "outputs": [
+            {
+                "name": "",
+                "type": "bool"
+            }
+        ],
+        "payable": false,
+        "stateMutability": "nonpayable",
+        "type": "function"
+    },
+    {
+        "constant": true,
+        "inputs": [],
+        "name": "totalSupply",
+        "outputs": [
+            {
+                "name": "",
+                "type": "uint256"
+            }
+        ],
+        "payable": false,
+        "stateMutability": "view",
+        "type": "function"
+    },
+    {
+        "constant": false,
+        "inputs": [
+            {
+                "name": "_from",
+                "type": "address"
+            },
+            {
+                "name": "_to",
+                "type": "address"
+            },
+            {
+                "name": "_value",
+                "type": "uint256"
+            }
+        ],
+        "name": "transferFrom",
+        "outputs": [
+            {
+                "name": "",
+                "type": "bool"
+            }
+        ],
+        "payable": false,
+        "stateMutability": "nonpayable",
+        "type": "function"
+    },
+    {
+        "constant": true,
+        "inputs": [],
+        "name": "decimals",
+        "outputs": [
+            {
+                "name": "",
+                "type": "uint8"
+            }
+        ],
+        "payable": false,
+        "stateMutability": "view",
+        "type": "function"
+    },
+    {
+        "constant": true,
+        "inputs": [
+            {
+                "name": "_owner",
+                "type": "address"
+            }
+        ],
+        "name": "balanceOf",
+        "outputs": [
+            {
+                "name": "balance",
+                "type": "uint256"
+            }
+        ],
+        "payable": false,
+        "stateMutability": "view",
+        "type": "function"
+    },
+    {
+        "constant": true,
+        "inputs": [],
+        "name": "symbol",
+        "outputs": [
+            {
+                "name": "",
+                "type": "string"
+            }
+        ],
+        "payable": false,
+        "stateMutability": "view",
+        "type": "function"
+    },
+    {
+        "constant": false,
+        "inputs": [
+            {
+                "name": "_to",
+                "type": "address"
+            },
+            {
+                "name": "_value",
+                "type": "uint256"
+            }
+        ],
+        "name": "transfer",
+        "outputs": [
+            {
+                "name": "",
+                "type": "bool"
+            }
+        ],
+        "payable": false,
+        "stateMutability": "nonpayable",
+        "type": "function"
+    },
+    {
+        "constant": true,
+        "inputs": [
+            {
+                "name": "_owner",
+                "type": "address"
+            },
+            {
+                "name": "_spender",
+                "type": "address"
+            }
+        ],
+        "name": "allowance",
+        "outputs": [
+            {
+                "name": "",
+                "type": "uint256"
+            }
+        ],
+        "payable": false,
+        "stateMutability": "view",
+        "type": "function"
+    },
+    {
+        "payable": true,
+        "stateMutability": "payable",
+        "type": "fallback"
+    },
+    {
+        "anonymous": false,
+        "inputs": [
+            {
+                "indexed": true,
+                "name": "owner",
+                "type": "address"
+            },
+            {
+                "indexed": true,
+                "name": "spender",
+                "type": "address"
+            },
+            {
+                "indexed": false,
+                "name": "value",
+                "type": "uint256"
+            }
+        ],
+        "name": "Approval",
+        "type": "event"
+    },
+    {
+        "anonymous": false,
+        "inputs": [
+            {
+                "indexed": true,
+                "name": "from",
+                "type": "address"
+            },
+            {
+                "indexed": true,
+                "name": "to",
+                "type": "address"
+            },
+            {
+                "indexed": false,
+                "name": "value",
+                "type": "uint256"
+            }
+        ],
+        "name": "Transfer",
+        "type": "event"
+    }
+]
\ No newline at end of file
diff --git a/common/xrc721abi.json b/common/xrc721abi.json
new file mode 100644
index 0000000..b0c0a3f
--- /dev/null
+++ b/common/xrc721abi.json
@@ -0,0 +1,366 @@
+[{
+    "constant": true,
+    "inputs": [{
+        "name": "interfaceId",
+        "type": "bytes4"
+    }],
+    "name": "supportsInterface",
+    "outputs": [{
+        "name": "",
+        "type": "bool"
+    }],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+},
+{
+    "constant": true,
+    "inputs": [],
+    "name": "name",
+    "outputs": [{
+        "name": "",
+        "type": "string"
+    }],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+},
+{
+    "constant": true,
+    "inputs": [{
+        "name": "tokenId",
+        "type": "uint256"
+    }],
+    "name": "getApproved",
+    "outputs": [{
+        "name": "",
+        "type": "address"
+    }],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+},
+{
+    "constant": false,
+    "inputs": [{
+            "name": "to",
+            "type": "address"
+        },
+        {
+            "name": "tokenId",
+            "type": "uint256"
+        }
+    ],
+    "name": "approve",
+    "outputs": [],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+},
+{
+    "constant": true,
+    "inputs": [],
+    "name": "totalSupply",
+    "outputs": [{
+        "name": "",
+        "type": "uint256"
+    }],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+},
+{
+    "constant": false,
+    "inputs": [{
+            "name": "from",
+            "type": "address"
+        },
+        {
+            "name": "to",
+            "type": "address"
+        },
+        {
+            "name": "tokenId",
+            "type": "uint256"
+        }
+    ],
+    "name": "transferFrom",
+    "outputs": [],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+},
+{
+    "constant": true,
+    "inputs": [{
+            "name": "owner",
+            "type": "address"
+        },
+        {
+            "name": "index",
+            "type": "uint256"
+        }
+    ],
+    "name": "tokenOfOwnerByIndex",
+    "outputs": [{
+        "name": "",
+        "type": "uint256"
+    }],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+},
+{
+    "constant": false,
+    "inputs": [{
+            "name": "from",
+            "type": "address"
+        },
+        {
+            "name": "to",
+            "type": "address"
+        },
+        {
+            "name": "tokenId",
+            "type": "uint256"
+        }
+    ],
+    "name": "safeTransferFrom",
+    "outputs": [],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+},
+{
+    "constant": true,
+    "inputs": [{
+        "name": "index",
+        "type": "uint256"
+    }],
+    "name": "tokenByIndex",
+    "outputs": [{
+        "name": "",
+        "type": "uint256"
+    }],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+},
+{
+    "constant": true,
+    "inputs": [{
+        "name": "tokenId",
+        "type": "uint256"
+    }],
+    "name": "ownerOf",
+    "outputs": [{
+        "name": "",
+        "type": "address"
+    }],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+},
+{
+    "constant": true,
+    "inputs": [{
+        "name": "owner",
+        "type": "address"
+    }],
+    "name": "balanceOf",
+    "outputs": [{
+        "name": "",
+        "type": "uint256"
+    }],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+},
+{
+    "constant": true,
+    "inputs": [],
+    "name": "symbol",
+    "outputs": [{
+        "name": "",
+        "type": "string"
+    }],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+},
+{
+    "constant": false,
+    "inputs": [{
+            "name": "to",
+            "type": "address"
+        },
+        {
+            "name": "approved",
+            "type": "bool"
+        }
+    ],
+    "name": "setApprovalForAll",
+    "outputs": [],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+},
+{
+    "constant": false,
+    "inputs": [{
+            "name": "from",
+            "type": "address"
+        },
+        {
+            "name": "to",
+            "type": "address"
+        },
+        {
+            "name": "tokenId",
+            "type": "uint256"
+        },
+        {
+            "name": "_data",
+            "type": "bytes"
+        }
+    ],
+    "name": "safeTransferFrom1",
+    "outputs": [],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+},
+{
+    "constant": true,
+    "inputs": [{
+        "name": "tokenId",
+        "type": "uint256"
+    }],
+    "name": "tokenURI",
+    "outputs": [{
+        "name": "",
+        "type": "string"
+    }],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+},
+{
+    "constant": false,
+    "inputs": [{
+            "name": "_to",
+            "type": "address"
+        },
+        {
+            "name": "_tokenId",
+            "type": "uint256"
+        },
+        {
+            "name": "_uri",
+            "type": "string"
+        }
+    ],
+    "name": "mint",
+    "outputs": [],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+},
+{
+    "constant": true,
+    "inputs": [{
+            "name": "owner",
+            "type": "address"
+        },
+        {
+            "name": "operator", 
+            "type": "address"
+        }
+    ],
+    "name": "isApprovedForAll",
+    "outputs": [{
+        "name": "",
+        "type": "bool"
+    }],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+},
+{
+    "inputs": [{
+            "name": "name",
+            "type": "string"
+        },
+        {
+            "name": "symbol",
+            "type": "string"
+        }
+    ],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "constructor"
+},
+{
+    "anonymous": false,
+    "inputs": [{
+            "indexed": true,
+            "name": "from",
+            "type": "address"
+        },
+        {
+            "indexed": true,
+            "name": "to",
+            "type": "address"
+        },
+        {
+            "indexed": true,
+            "name": "tokenId",
+            "type": "uint256"
+        }
+    ],
+    "name": "Transfer",
+    "type": "event"
+},
+{
+    "anonymous": false,
+    "inputs": [{
+            "indexed": true,
+            "name": "owner",
+            "type": "address"
+        },
+        {
+            "indexed": true,
+            "name": "approved",
+            "type": "address"
+        },
+        {
+            "indexed": true,
+            "name": "tokenId",
+            "type": "uint256"
+        }
+    ],
+    "name": "Approval",
+    "type": "event"
+},
+{
+    "anonymous": false,
+    "inputs": [{
+            "indexed": true,
+            "name": "owner",
+            "type": "address"
+        },
+        {
+            "indexed": true,
+            "name": "operator",
+            "type": "address"
+        },
+        {
+            "indexed": false,
+            "name": "approved",
+            "type": "bool"
+        }
+    ],
+    "name": "ApprovalForAll",
+    "type": "event"
+}
+]
\ No newline at end of file
diff --git a/eth.py b/eth.py
deleted file mode 100644
index b35f1f5..0000000
--- a/eth.py
+++ /dev/null
@@ -1,213 +0,0 @@
-from Base_API_Call import API
-import http.client
-import json
-
-class eth_Request:
-    def protocolVersion(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//protocolVersion"
-        Payload =  "{\"jsonrpc\":\"2.0\",\"method\":\"eth_protocolVersion\",\"params\":[],\"id\":67}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def syncing(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//syncing"
-        Payload =  "{\"jsonrpc\":\"2.0\",\"method\":\"eth_syncing\",\"params\":[],\"id\":1}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def coinbase(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//coinbase"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_coinbase\",\"params\":[],\"id\":64}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def gasPrice(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//gasPrice"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_gasPrice\",\"params\":[],\"id\":73}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def accounts(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON",ETH_account="0x438e0b511981FE8CF7283e981ca8c3394bB3646E"):
-        Call = "POST"
-        Content = "//accounts"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_accounts\",\"params\":[%s],\"id\":1}" % ETH_account
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def blockNumber(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//blockNumber"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_blockNumber\",\"params\":[],\"id\":83}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def getBalance(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON",Address=""):
-        Call = "POST"
-        Content = "//getBalance"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_getBalance\",\"params\":[\"xdce4C4FeBE1Cb34C3490167c163C9ED92049B32B5c\",\"latest\"],\"id\":1}" 
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-#### REVIEW #### 
-    def getStorageAt(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//getStorageAt"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_getStorageAt\",\"params\":[\"0x295a70b2de5e3953354a6a8344e616ed314d7251\",\"0x0\",\"latest\"],\"id\":1}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-#### #### #### ####
-    def getTransactionCount(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//getTransactionCount"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_getTransactionCount\",\"params\":[\"0xbf1dcb735e512b731abd3404c15df6431bd03d42\",\"latest\"],\"id\":1}"
-
-        return API.Format(Call,Payload,Content,conn,form)
- 
-    def getBlockTransactionCountByHash(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content =  "//getBlockTransactionCountByHash"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_getBlockTransactionCountByHash\",\"params\":[\"0xc8b967161c671ce952a3d50987a78d64157fb5a8e1724804b87d3e9b11e3aa34\"],\"id\":1}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def getBlockTransactionCountByNumber(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//getBlockTransactionCountByNumber"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_getBlockTransactionCountByNumber\",\"params\":[\"0x52A8CA\"],\"id\":1}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def getCode(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//getCode"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_getCode\",\"params\":[\"0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b\",\"0x2\"],\"id\":1}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-#### REVIEW #### 
-    def sign(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//sign"
-        Payload =  "{ \"jsonrpc\": \"2.0\", \"method\": \"eth_accounts\", \"params\": [], \"id\": 1}"
-                
-        return API.Format(Call,Payload,Content,conn,form)
-#### #### #### ####
-
-    def sendTransaction(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//sendTransaction"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_sendTransaction\",\"params\":[{\"from\":\"0xb60e8dd61c5d32be8058bb8eb970870f07233155\",\"to\":\"0xd46e8dd67c5d32be8058bb8eb970870f07244567\",\"gas\":\"0x76c0\",\"gasPrice\":\"0x9184e72a000\",\"value\":\"0x9184e72a\",\"data\":\"0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675\"}],\"id\":1}"
-
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def sendRawTransaction(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content =  "//sendRawTransaction"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_sendRawTransaction\",\"params\":[\"0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675\"],\"id\":1}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def call(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//call"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_call\",\"params\":[{\"from\":\"0xb60e8dd61c5d32be8058bb8eb970870f07233155\",\"to\":\"0xd46e8dd67c5d32be8058bb8eb970870f07244567\",\"gas\":\"0x76c0\",\"gasPrice\":\"0x9184e72a000\",\"value\":\"0x9184e72a\",\"data\":\"0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675\"},\"latest\"],\"id\":1}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def estimateGas(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content =  "//estimateGas"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_estimateGas\",\"params\":[{\"from\":\"0xb60e8dd61c5d32be8058bb8eb970870f07233155\",\"to\":\"0xd46e8dd67c5d32be8058bb8eb970870f07244567\",\"gas\":\"0x76c0\",\"gasPrice\":\"0x9184e72a000\",\"value\":\"0x9184e72a\",\"data\":\"0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675\"}],\"id\":1}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def getBlockByHash(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//getBlockByHash"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_getBlockByHash\",\"params\":[\"0x9326145f8a2c8c00bbe13afc7d7f3d9c868b5ef39d89f2f4e9390e9720298624\",true],\"id\":1}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def getBlockByNumber(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//getBlockByNumber"
-        Payload =  "{\"jsonrpc\":\"2.0\",\"method\":\"eth_getBlockByNumber\",\"params\":[\"0x0\",true],\"id\":1}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def getBlockSignersByNumber(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//getBlockSignersByNumber"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_getBlockSignersByNumber\",\"params\":[\"0xA61F98\"],\"id\":1}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def getBlockSignersByHash(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//getBlockSignersByHash"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_getBlockSignersByHash\",\"params\":[\"0x605777ee60ef3ccf21e079fa1b091b0196cf1a2c1dd7c088dd5b1ab03f680b6f\"],\"id\":1}"
-
-        return API.Format(Call,Payload,Content,conn,form)
- 
-    def getBlockFinalityByNumber(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//getBlockFinalityByNumber"
-        Payload =  "{\"jsonrpc\":\"2.0\",\"method\":\"eth_getBlockFinalityByNumber\",\"params\":[\"0xA61F98\"],\"id\":1}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def getBlockFinalityByHash(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//getBlockFinalityByHash"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_getBlockFinalityByHash\",\"params\":[\"0x605777ee60ef3ccf21e079fa1b091b0196cf1a2c1dd7c088dd5b1ab03f680b6f\"],\"id\":1}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def getCandidates(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//getCandidates"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_getCandidates\",\"params\":[\"latest\"],\"id\":1}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def getCandidateStatus(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//getCandidateStatus"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_getCandidateStatus\",\"params\":[\"0x1d50df657b6dce50bac634bf18e2d986d807e940\",\"latest\"],\"id\":1}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def getTransactionByHash(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//getTransactionByHash"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_getTransactionByHash\",\"params\":[\"0xd83b26e101dd6480764bade90fc283407919f60b7e65ff83fbf6cdc92f1138a1\"],\"id\":1}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def getTransactionByBlockHashAndIndex(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//getTransactionByBlockHashAndIndex"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_getTransactionByBlockHashAndIndex\",\"params\":[\"0x3c82bc62179602b67318c013c10f99011037c49cba84e31ffe6e465a21c521a7\",\"0x0\"],\"id\":1}"
-
-        return API.Format(Call,Payload,Content,conn,form)
- 
-    def getTransactionByBlockNumberAndIndex(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//getTransactionByBlockNumberAndIndex"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_getTransactionByBlockNumberAndIndex\",\"params\":[\"0x52A96E\",\"0x1\"],\"id\":1}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def getTransactionReceipt(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//getTransactionReceipt"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"eth_getTransactionReceipt\",\"params\":[\"0xa3ece39ae137617669c6933b7578b94e705e765683f260fcfe30eaa41932610f\"],\"id\":1}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-
diff --git a/net.py b/net.py
deleted file mode 100644
index 8185df2..0000000
--- a/net.py
+++ /dev/null
@@ -1,27 +0,0 @@
-from Base_API_Call import API
-import http.client
-import json
-
-class net_Request:
-    def version(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//version"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"net_version\",\"params\":[],\"id\":67}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def listening(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//listening"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"net_listening\",\"params\":[],\"id\":67}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def peerCount(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//peerCount"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"net_peerCount\",\"params\":[],\"id\":74}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-
diff --git a/setup.py b/setup.py
new file mode 100644
index 0000000..69516d0
--- /dev/null
+++ b/setup.py
@@ -0,0 +1,15 @@
+from setuptools import setup, find_packages
+
+
+
+setup(
+    name = 'XDC3PYTHON',
+    version = '1.0.0',
+    description = 'XDC RUST SDK with support for smart contracts, XRC20 & XRC721',
+    long_description=open('README.md').read(),
+    url='https://github.com/XDCFoundation/XDC_Python_SDK_V1.git',
+    author='XDC Foundation',
+    license='MIT',
+    keywords='',
+    packages=find_packages(),
+)
\ No newline at end of file
diff --git a/tatum.py b/tatum.py
deleted file mode 100644
index 2a2a43a..0000000
--- a/tatum.py
+++ /dev/null
@@ -1,195 +0,0 @@
-from Base_API_Call import API
-import http.client
-import json
-
-conn = http.client.HTTPSConnection("api-eu1.tatum.io")
-
-class tatum_Request():
-    def Generate_XDC_Wallet(Seed, API_KEY,form="JSON"):
-        headers = { 'x-api-key': API_KEY }
-        conn.request("GET", "/v3/xdc/wallet?mnemonic=%s" % Seed, headers=headers)
-
-        res = conn.getresponse()
-        data = res.read()
-
-        if form == "JSON":
-            return data.decode("utf-8")
-        else:
-            DATA = data.decode("utf-8")
-            Item = json.loads(DATA)
-            
-            xpub = Item["xpub"]
-            mnemonic =Item["mnemonic"]
-
-            return xpub
-
-############ TEST ############
-    def Generate_XDC_Wallet_EPK(API_KEY,xpub,index,form="JSON"):
-        headers = { 'x-api-key': API_KEY }
-        conn.request("GET", "/v3/xdc/address/%s/%s" % (xpub,index), headers=headers)
-        res = conn.getresponse()
-        data = res.read()
-
-        if form == "JSON":
-            return data.decode("utf-8")
-        else:
-            DATA = data.decode("utf-8")
-            Item = json.loads(DATA)
-            address = Item["address"]
-
-            return address
-
-    def Generate_XDC_Private_key(API_KEY,Seed,form="JSON"):
-        payload = "{\"index\":0,\"mnemonic\":\"%s\"}" % Seed
-        headers = {
-            'content-type': "application/json",
-            'x-api-key': API_KEY
-            }
-
-        conn.request("POST", "/v3/xdc/wallet/priv", payload, headers)
-        res = conn.getresponse()
-        data = res.read()
-
-        if form == "JSON":
-            return data.decode("utf-8")
-        else:
-            DATA = data.decode("utf-8")
-            Item = json.loads(DATA)
-            key = Item["key"] 
-
-            return key
-
-    def Web3_HTTP_Driver(ApiKey,form="JSON"):
-        Call = "POST"
-        Content = "/v3/xdc/web3/%s" % ApiKey
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"web3_clientVersion\",\"params\":[],\"id\":2}"
-
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def Current_Block_Number(API_Key,form="JSON"):
-        conn = http.client.HTTPSConnection("api-eu1.tatum.io")
-        headers = { 'x-api-key': API_Key }
-        conn.request("GET", "/v3/xdc/block/current", headers=headers)
-        res = conn.getresponse()
-        data = res.read()
-
-        return (data.decode("utf-8"))
-
-####### TEST #######
-    def XDC_Block_by_Hash(API_KEY,Hash,form="JSON"):
-        conn = http.client.HTTPSConnection("api-eu1.tatum.io")
-        headers = { 'x-api-key': API_KEY }
-        conn.request("GET", "/v3/xdc/block/%s" % Hash, headers=headers)
-        res = conn.getresponse()
-        data = res.read()
-
-        return (data.decode("utf-8"))
-
-    def XDC_Account_Balance(API_KEY,Address,form="JSON"):
-        conn = http.client.HTTPSConnection("api-eu1.tatum.io")
-        headers = { 'x-api-key': API_KEY }
-        conn.request("GET", "/v3/xdc/account/balance/%s" % Address, headers=headers)
-        res = conn.getresponse()
-        data = res.read()
-
-        if form == "Text":
-            Item = json.loads(data.decode("utf-8"))
-            balance = Item["balance"]
-            return balance
-        else:
-            return (data.decode("utf-8"))
-
-    def  XDC_Transaction(API_KEY,Hash,form="JSON"):
-        conn = http.client.HTTPSConnection("api-eu1.tatum.io")
-        headers = { 'x-api-key': API_KEY }
-        conn.request("GET", "/v3/xdc/transaction/%s" % Hash, headers=headers)
-        res = conn.getresponse()
-        data = res.read()
-
-        if form == "Text":
-            Item = json.loads(data.decode("utf-8")) 
-            blockHash = Item["blockHash"]   
-            blockNumber = Item["blockNumber"]  
-            From = Item["from"]  
-            gas = Item["gas"]  
-            gasPrice = Item["gasPrice"]  
-            input = Item["input"]  
-            nonce = Item["nonce"]  
-            To = Item["to"]  
-            transactionIndex = Item["transactionIndex"]  
-            value = Item["value"]  
-            contractAddress = Item["contractAddress"]  
-            cumulativeGasUsed = Item["cumulativeGasUsed"]  
-            gasUsed = Item["gasUsed"]  
-            logs = Item["logs"]  
-
-            return [blockHash,blockNumber,From,gas,gasPrice,input,nonce,To,transactionIndex,value,contractAddress,cumulativeGasUsed,gasUsed,logs]
-        else:
-            return (data.decode("utf-8"))
-
-    def Count_Outgoing_XDC_Transactions(API_KEY,Address,form="JSON"):
-        conn = http.client.HTTPSConnection("api-eu1.tatum.io")
-        headers = { 'x-api-key': API_KEY }
-        conn.request("GET", "/v3/xdc/transaction/count/%s" % Address, headers=headers)
-        res = conn.getresponse()
-        data = res.read()
-
-        return data.decode("utf-8")
-
-####### TEST #######
-    def Send_XDC_ERC20(API_KEY,form="JSON"):
-        conn = http.client.HTTPSConnection("api-eu1.tatum.io")
-        payload = "{\"data\":\"My note to recipient.\",\"nonce\":0,\"to\":\"xdc687422eEA2cB73B5d3e242bA5456b782919AFc85\",\"fee\":{\"gasLimit\":\"40000\",\"gasPrice\":\"20\"},\"amount\":\"100000\",\"fromPrivateKey\":\"0x05e150c73f1920ec14caa1e0b6aa09940899678051a78542840c2668ce5080c2\"}"
-        headers = {
-            'content-type': "application/json",
-            'x-api-key': API_KEY
-            }
-        conn.request("POST", "/v3/xdc/transaction", payload, headers)
-        res = conn.getresponse()
-        data = res.read()
-
-        return data.decode("utf-8")
-
-####### TEST #######
-    def Estimate_XDC_Transaction_Fees(API_KEY,Address1,Address2,form="JSON"):
-        conn = http.client.HTTPSConnection("api-eu1.tatum.io")
-        payload = "{\"from\":\"xdcfb99f8ae9b70a0c8cd96ae665bbaf85a7e01a2ef\",\"to\":\"xdc687422eEA2cB73B5d3e242bA5456b782919AFc85\",\"amount\":\"100000\",\"data\":\"My note to recipient.\"}"
-        headers = {
-            'content-type': "application/json",
-            'x-api-key': API_KEY
-            }
-        conn.request("POST", "/v3/xdc/gas", payload, headers)
-        res = conn.getresponse()
-        data = res.read()
-
-        return data.decode("utf-8")
-
-####### TEST #######
-    def Execute_Smart_Contract(API_KEY,contractAddress,form="JSON"):
-        conn = http.client.HTTPSConnection("api-eu1.tatum.io")
-        payload = "{\"contractAddress\":\"xdc687422eEA2cB73B5d3e242bA5456b782919AFc85\",\"methodName\":\"transfer\",\"methodABI\":{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"stake\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},\"params\":[\"0x632\"]}"
-        headers = {
-            'content-type': "application/json",
-            'x-api-key': API_KEY
-            }
-
-        conn.request("POST", "/v3/xdc/smartcontract", payload, headers)
-        res = conn.getresponse()
-        data = res.read()
-
-        return (data.decode("utf-8"))
-
-####### TEST #######
-    def Broadcast_Signed_XDC_Transaction(API_KEY,txData,signatureId,form="JSON"):
-        conn = http.client.HTTPSConnection("api-eu1.tatum.io")
-        payload = "{\"txData\":\"62BD544D1B9031EFC330A3E855CC3A0D51CA5131455C1AB3BCAC6D243F65460D\",\"signatureId\":\"1f7f7c0c-3906-4aa1-9dfe-4b67c43918f6\"}"
-        headers = {
-            'content-type': "application/json",
-            'x-api-key': API_KEY
-            }
-
-        conn.request("POST", "/v3/xdc/broadcast", payload, headers)
-        res = conn.getresponse()
-        data = res.read()
-
-        return (data.decode("utf-8"))
diff --git a/web3.py b/web3.py
deleted file mode 100644
index 5e69052..0000000
--- a/web3.py
+++ /dev/null
@@ -1,17 +0,0 @@
-from Base_API_Call import API
-import http.client
-
-class web3_Request:
-    def clientVersion(conn=http.client.HTTPSConnection("rpc.xinfin.network"), form="JSON"):
-        Call = "POST"
-        Content = "//version"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"net_version\",\"params\":[],\"id\":67}"
-        
-        return API.Format(Call,Payload,Content,conn,form)
-
-    def sha3(conn=http.client.HTTPSConnection("rpc.xinfin.network"),form ="JSON",Hash=""):
-        Call = "POST"
-        Content = "//sha3"
-        Payload = "{\"jsonrpc\":\"2.0\",\"method\":\"web3_sha3\",\"params\":[\"0x%s\"],\"id\":64}" % Hash
-
-        return API.Format(Call,Payload,Content,conn,form)
\ No newline at end of file

From 4d2bdc79e503d41c8556b3bc5c54051f619fb162 Mon Sep 17 00:00:00 2001
From: lhtsaurabhsingh <saurabhp@leewayhertz.com>
Date: Wed, 11 May 2022 16:45:50 +0530
Subject: [PATCH 2/5] python xdc sdk xrc20 and xrc721 methods

---
 .env                  |   1 -
 README.md             | 100 +++++-------
 XDC3PYTHON/xrc20.py   | 186 ++++++++++-----------
 XDC3PYTHON/xrc721.py  | 145 ++++++++---------
 common/xrc20abi.json  | 222 -------------------------
 common/xrc721abi.json | 366 ------------------------------------------
 setup.py              |   4 +-
 7 files changed, 202 insertions(+), 822 deletions(-)
 delete mode 100644 .env
 delete mode 100644 common/xrc20abi.json
 delete mode 100644 common/xrc721abi.json

diff --git a/.env b/.env
deleted file mode 100644
index 1d00c4e..0000000
--- a/.env
+++ /dev/null
@@ -1 +0,0 @@
-NETWORK_URL = "https://rpc.apothem.network"
\ No newline at end of file
diff --git a/README.md b/README.md
index 0cc0d3c..4b64951 100644
--- a/README.md
+++ b/README.md
@@ -1,86 +1,72 @@
 # XDC3PYTHON
-```
-XDC3PYTHON SDK with support for smart contracts, XRC20 & XRC721.
-```
 
-# Usage
-```
-run this command pip install XDC3PYTHON to add dependecies.
-```
+XDC3PYTHON SDK with support for smart contracts, XDC20 & XRC721. 
 
-[dependencies]
-```
-XDC3PYTHON = "1.0.0"
-```
 
-This SDK supports following Read & Write operations:-
+## Usage
 
+**pip install XDC3PYTHON**
 
-```
+### This SDK supports following Read & Write operations:-
 
-  |    XRC20 Token: Read methods                            |   XRC20 Token: Write methods                          |
-  |                                                         |                                                       | 
-  |     name()                                              |   approve(receiverAddress , amount)                   |
-  |     symbol()                                            |   transfer(recipient, amount)                         |
-  |     decimal()                                           |   transferFrom(sender, recipient, amount)             |
-  |     totalSupply()                                       |   increaseAllowance(spender, addedValue)              |
-  |     balanceOf(account)                                  |   decreaseAllowance(spender, subtractedValue)         |
-  |     allowance(owner, spender)                           |                                                       |
-  |                                                         |                                                       |
-                                            
-  |    XRC721 Token: Read methods                           |   XRC721 Token: Write methods                         |
-  |                                                         |                                                       |
-  |     name()                                              |   setApprovalForAll(spenderAddress, booleanValue)     |
-  |     symbol()                                            |   approve(spenderAddress , tokenId)                   |
-  |     totalSupply()                                       |   transferFrom(receiver, tokenId)                     |
-  |     balanceOf(ownerAddress)                             |   safeTransferFrom(receiver, tokenId)                 |
-  |     ownerOf(tokenId)                                    |                                                       |
-  |     tokenURI(tokenId)                                   |                                                       |
-  |     tokenByIndex(index)                                 |                                                       |
-  |     tokenOfOwnerByIndex(ownerAddress,index)             |                                                       |
-  |     supportInterface(interfaceId)                       |                                                       |
-  |     getApproved(tokenId)                                |                                                       |
-  |     isApprovedForAll(ownerAddress,spenderAddr)          |                                                       |
-  |                                                         |                                                       |
+* xrc20 methods.
+    * Read methods.
+        * name(), balanceOf(account), totalSupply(), symbol(), decimals(), allowance(pwner, spender).
 
-```
+    * Write methods.
+        * transferXDC(owner,receiver), approve(spender,amount), transferToken(receiver,amount), increaseAllowance(spender, addedValue), decreaseAllowance(spender, subtractedValue), transferFrom(sender, receiver, amount).
 
-# Environment Variable
-```
-Create a .env file in the root directory of the Python project to put the wallet and endpoint information in like so: NETWORK_URL = "https://rpc.apothem.network"
-```
+* xrc721 methods.
+    * Read methods.
+        * name(), symbol(), totalsupply(), balanceOf(ownerAddr), ownerOf(tokenId), tokenURI(tokenId), tokenByIndex(index), tokenOfOwnerByIndex(ownerAddress,index), supportInterface(interfaceId), getApproved(tokenId), isApprovedForAll(ownerAddress,spenderAddress).
+
+    * Write methods.
+        * setApprovalForAll(spenderAddress, booleanValue), approve(sepnderAddress , tokenId), transferFrom(recipient, tokenId), safeTransferFrom(spender, tokenId).
 
-Example for XRC20.
-```
 
-from XDC3PYTHON import XRC20
+### Example for XRC20.
 
 
+```
+from XDC3PYTHON.xrc20 import XRC20
+
 if __name__=="__main__":
 
-    token = input('Enter token address: ')
-    a = XRC20.name(token)
-    print(a)
+    NETWORK_URL = "Your endpoint Url"
+
+    obj = XRC20(NETWORK_URL)
+
+    tokenAddr = input('Enter Token Address: ')
+  
+    tokenSymbol = obj.name(tokenAddr)
+    print(tokenSymbol) 
 ```
 
 This example returns name of the specified address.
 
-Example for XRC721.
+### Example for XRC721.
+
 ```
+from XDC3PYTHON.xrc721 import XRC721
 
-from XDC3PYTHON import XRC721
+if __name__=="__main__":
 
+    NETWORK_URL = "Your endpoint Url"
 
-if __name__=="__main__":
+    obj = XRC721(NETWORK_URL)
 
-    token = input('Enter token address: ')
-    a = XRC721.symbol(token)
-    print(a)
+    tokenAddr = input('Enter Token Address: ')
+  
+    tokenSymbol = obj.name(tokenAddr)
+    print(tokenSymbol) 
 ```
 
 This example returns symbol of the specified address.
 
 # Transports
-```
- HTTP transport
-```
+
+**HTTP transport**
+
+### Author
+[XDCFoundation](https://github.com/XDCFoundation/XDC_Python_SDK_V1)
+
diff --git a/XDC3PYTHON/xrc20.py b/XDC3PYTHON/xrc20.py
index eab168f..af78d2f 100644
--- a/XDC3PYTHON/xrc20.py
+++ b/XDC3PYTHON/xrc20.py
@@ -1,91 +1,93 @@
+from lib2to3.pgen2 import token
 from web3 import Web3
 from web3._utils.encoding import (
     hexstr_if_str,
     to_bytes,
 )
-from decouple import config
-import json
 
+# xrc20 abi.json
+xrc20abi = "[{\"constant\":true,\"inputs\":[],\"name\":\"name\",\"outputs\":[{\"name\":\"\",\"type\":\"string\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"_spender\",\"type\":\"address\"},{\"name\":\"_value\",\"type\":\"uint256\"}],\"name\":\"approve\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"totalSupply\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"_from\",\"type\":\"address\"},{\"name\":\"_to\",\"type\":\"address\"},{\"name\":\"_value\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"decimals\",\"outputs\":[{\"name\":\"\",\"type\":\"uint8\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"_owner\",\"type\":\"address\"}],\"name\":\"balanceOf\",\"outputs\":[{\"name\":\"balance\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"symbol\",\"outputs\":[{\"name\":\"\",\"type\":\"string\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"_to\",\"type\":\"address\"},{\"name\":\"_value\",\"type\":\"uint256\"}],\"name\":\"transfer\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"_owner\",\"type\":\"address\"},{\"name\":\"_spender\",\"type\":\"address\"}],\"name\":\"allowance\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"payable\":true,\"stateMutability\":\"payable\",\"type\":\"fallback\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"owner\",\"type\":\"address\"},{\"indexed\":true,\"name\":\"spender\",\"type\":\"address\"},{\"indexed\":false,\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"Approval\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"name\":\"to\",\"type\":\"address\"},{\"indexed\":false,\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"Transfer\",\"type\":\"event\"}]"
 
-rpcUrl = config('NETWORK_URL')
-
-# HTTPProvider:
-w3 = Web3(Web3.HTTPProvider(rpcUrl))
-
-# path of abi file
-with open('./common/xrc20abi.json') as abiJson:
-    xrc20abi = json.load(abiJson)
 
 # This is a class which consists all the methods as per XRC20 standards.
 
 class XRC20:
 
+    def __init__(self,rpcUrl):
+        self.rpcUrl = rpcUrl
+
+    # connection to network.
+
+    def getConnection(self):
+        w3 = Web3(Web3.HTTPProvider(self.rpcUrl))
+        return w3
+    
+    # get contract Instance.
+
+    def getContractInstance(self, tokenAddr):
+        contractInstance = self.getConnection().eth.contract(address=tokenAddr, abi=xrc20abi)
+        return contractInstance
+
     # Gets the Name of the specified address.
     # Token address is required as argument.
 
-    def name(tokenAddr):
-        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc20abi)
-        name = contractInstance.functions.name().call()
+    def name(self, tokenAddr):
+        name = self.getContractInstance(tokenAddr).functions.name().call()
         return name
 
     # Gets method returns total supply of token.
     # Token address is required as argument.
 
-    def totalSupply(tokenAddr):
-        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc20abi)
-        totalSupply = contractInstance.functions.totalSupply().call()
-        totalSupply = w3.fromWei(totalSupply, 'ether')
+    def totalSupply(self, tokenAddr):
+        totalSupply = self.getContractInstance(tokenAddr).functions.totalSupply().call()
+        totalSupply = self.getConnection().fromWei(totalSupply, 'ether')
         return totalSupply
 
     # Gets the Decimal of the specified address.
     # Token address is required as argument.
 
-    def decimal(tokenAddr):
-        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc20abi)
-        decimal = contractInstance.functions.decimals().call()
+    def decimal(self, tokenAddr):
+        decimal = self.getContractInstance(tokenAddr).functions.decimals().call()
         return decimal
 
     # Gets the Symbol of the specified address.
     # Token address is required as argument.
 
-    def symbol(tokenAddr):
-        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc20abi)
-        symbol = contractInstance.functions.symbol().call()
+    def symbol(self, tokenAddr):
+        symbol = self.getContractInstance(tokenAddr).functions.symbol().call()
         return symbol
 
     # Gets the balance of the specified address.
     # token address, owner address are required as arguments.
 
-    def balanceOf(tokenAddr, ownerAddress):
-        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc20abi)
+    def balanceOf(self, tokenAddr, ownerAddress):
         owner = Web3.toChecksumAddress(ownerAddress)
-        balance = contractInstance.functions.balanceOf(owner).call()
-        return w3.fromWei(balance, 'ether')
+        balance = self.getContractInstance(tokenAddr).functions.balanceOf(owner).call()
+        return self.getConnection().fromWei(balance, 'ether')
 
     # This method returns how much allowance spender have from owner.
     # This function required three arguments.
     # owner address, spender address, token address.
 
-    def allowance(tokenAddr, ownerAddress, spenderAddress):
-        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc20abi)
+    def allowance(self, tokenAddr, ownerAddress, spenderAddress):
         owner = Web3.toChecksumAddress(ownerAddress)
         spender = Web3.toChecksumAddress(spenderAddress)
-        Allowance = contractInstance.functions.allowance(owner, spender).call()
-        return w3.fromWei(Allowance, 'ether')
+        Allowance = self.getContractInstance(tokenAddr).functions.allowance(owner, spender).call()
+        return self.getConnection().fromWei(Allowance, 'ether')
 
     # Transfer XDC for a specified address.
     # This function requires following arguments.
     # private key, recipient address, amount.
 
-    def transferXDC(ownerAddress, receiverAddress, ownerPrivateKey, amount):
+    def transferXDC(self, ownerAddress, receiverAddress, ownerPrivateKey, amount):
 
         owner = Web3.toChecksumAddress(ownerAddress)
         spender = Web3.toChecksumAddress(receiverAddress)
-        amount = w3.toWei(amount, 'ether')
+        amount = self.getConnection().toWei(amount, 'ether')
 
-        nonce = w3.eth.getTransactionCount(owner)
-        gasPrice = w3.eth.gas_price
-        estimateGas = w3.eth.estimateGas({
+        nonce = self.getConnection().eth.getTransactionCount(owner)
+        gasPrice = self.getConnection().eth.gas_price
+        estimateGas = self.getConnection().eth.estimateGas({
             'to': spender,
             'from': owner,
             'value': amount
@@ -99,30 +101,28 @@ def transferXDC(ownerAddress, receiverAddress, ownerPrivateKey, amount):
             'gasPrice': gasPrice,
         }
 
-        signedTx = w3.eth.account.signTransaction(tx, ownerPrivateKey)
+        signedTx = self.getConnection().eth.account.signTransaction(tx, ownerPrivateKey)
 
-        txHash = w3.eth.sendRawTransaction(signedTx.rawTransaction)
-        return w3.toHex(txHash)
+        txHash = self.getConnection().eth.sendRawTransaction(signedTx.rawTransaction)
+        return self.getConnection().toHex(txHash)
 
     # Transfer token for a specified address.
     # This function requires following arguments.
     # ownerAddress, ownerPrivateKey, receiver address, token address, amount.
 
-    def transferToken(tokenAddr, ownerAddress, ownerPrivateKey,  receiverAddress, amount):
-
-        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc20abi)
+    def transferToken(self, tokenAddr, ownerAddress, ownerPrivateKey,  receiverAddress, amount):
 
         owner = Web3.toChecksumAddress(ownerAddress)
         spender = Web3.toChecksumAddress(receiverAddress)
 
-        balance = contractInstance.functions.balanceOf(owner).call()
+        balance = self.balanceOf(tokenAddr,owner)
 
         if amount > balance:
             return "amount exceeds balance"
 
-        amount = w3.toWei(amount, 'ether')
+        amount = self.getConnection().toWei(amount, 'ether')
 
-        Transfer = contractInstance.functions.transfer(spender, amount)
+        Transfer =  self.getContractInstance(tokenAddr).functions.transfer(spender, amount)
 
         hexData = Transfer._encode_transaction_data()
 
@@ -134,8 +134,8 @@ def transferToken(tokenAddr, ownerAddress, ownerPrivateKey,  receiverAddress, am
             }
         )
 
-        nonce = w3.eth.getTransactionCount(owner)
-        gasPrice = w3.eth.gas_price
+        nonce = self.getConnection().eth.getTransactionCount(owner)
+        gasPrice = self.getConnection().eth.gas_price
 
         tx = {
             'nonce': nonce,
@@ -145,31 +145,29 @@ def transferToken(tokenAddr, ownerAddress, ownerPrivateKey,  receiverAddress, am
             'gasPrice': gasPrice,
         }
 
-        signedTx = w3.eth.account.signTransaction(tx, ownerPrivateKey)
+        signedTx = self.getConnection().eth.account.signTransaction(tx, ownerPrivateKey)
 
-        txHash = w3.eth.sendRawTransaction(signedTx.rawTransaction)
-        return w3.toHex(txHash)
+        txHash = self.getConnection().eth.sendRawTransaction(signedTx.rawTransaction)
+        return self.getConnection().toHex(txHash)
 
     # Approve the passed address to spend the specified amount of tokens on behalf of owner.
     # This function required arguments.
     # ownerAddress, ownerPrivateKey, spenderAddress, tokenAddr, amount.
 
-    def approve(tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress, amount):
-        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc20abi)
+    def approve(self, tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress, amount):
 
         owner = Web3.toChecksumAddress(ownerAddress)
         spender = Web3.toChecksumAddress(spenderAddress)
 
-        balance = contractInstance.functions.balanceOf(owner).call()
-        allowanceAmount = contractInstance.functions.allowance(
-            owner, spender).call()
+        balance = self.balanceOf(tokenAddr, owner)
+        allowanceAmount = self.allowance(tokenAddr, owner, spender)
 
         if amount > balance and allowanceAmount > balance:
             return "amount exceeds balance"
 
-        amount = w3.toWei(amount, 'ether')
+        amount = self.getConnection().toWei(amount, 'ether')
 
-        approveData = contractInstance.functions.approve(spender, amount)
+        approveData =  self.getContractInstance(tokenAddr).functions.approve(spender, amount)
 
         hexData = approveData._encode_transaction_data()
 
@@ -177,9 +175,9 @@ def approve(tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress, amount):
 
         estimateGas = approveData.estimateGas()
 
-        nonce = w3.eth.getTransactionCount(owner)
+        nonce = self.getConnection().eth.getTransactionCount(owner)
 
-        gasPrice = w3.eth.gas_price
+        gasPrice = self.getConnection().eth.gas_price
 
         tx = {
             'nonce': nonce,
@@ -189,37 +187,35 @@ def approve(tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress, amount):
             'gasPrice': gasPrice,
         }
 
-        signedTx = w3.eth.account.signTransaction(tx, ownerPrivateKey)
+        signedTx = self.getConnection().eth.account.signTransaction(tx, ownerPrivateKey)
 
-        txHash = w3.eth.sendRawTransaction(signedTx.rawTransaction)
-        return w3.toHex(txHash)
+        txHash = self.getConnection().eth.sendRawTransaction(signedTx.rawTransaction)
+        return self.getConnection().toHex(txHash)
 
     # increase the amount of tokens that an owner allowed to a spender.
     # This function required arguments.
     # owner address, ownerPrivateKey, spender address, token address, amount.
 
-    def increaseAllowance(tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress, amount):
+    def increaseAllowance(self, tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress, amount):
 
-        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc20abi)
 
         owner = Web3.toChecksumAddress(ownerAddress)
         spender = Web3.toChecksumAddress(spenderAddress)
 
-        balance = contractInstance.functions.balanceOf(owner).call()
+        balance = self.balanceOf(tokenAddr, owner)
 
-        allowanceAmount = contractInstance.functions.allowance(
-            owner, spender).call()
+        allowanceAmount = self.allowance(tokenAddr, owner , spender)
 
-        allowanceAmount = w3.fromWei(allowanceAmount, 'ether')
+        allowanceAmount = self.getConnection().fromWei(allowanceAmount, 'ether')
 
         totalAmount = allowanceAmount + amount
 
         if totalAmount > balance:
             return "amount exceeds balance"
 
-        totalAmount = w3.toWei(totalAmount, 'ether')
+        totalAmount = self.getConnection().toWei(totalAmount, 'ether')
 
-        Transfer = contractInstance.functions.approve(spender, totalAmount)
+        Transfer =  self.getContractInstance(tokenAddr).functions.approve(spender, totalAmount)
 
         hexData = Transfer._encode_transaction_data()
 
@@ -227,8 +223,8 @@ def increaseAllowance(tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress,
 
         estimateGas = Transfer.estimateGas()
 
-        nonce = w3.eth.getTransactionCount(owner)
-        gasPrice = w3.eth.gas_price
+        nonce = self.getConnection().eth.getTransactionCount(owner)
+        gasPrice = self.getConnection().eth.gas_price
 
         tx = {
             'nonce': nonce,
@@ -237,33 +233,31 @@ def increaseAllowance(tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress,
             'gas': estimateGas,
             'gasPrice': gasPrice,
         }
-        signedTx = w3.eth.account.signTransaction(tx, ownerPrivateKey)
+        signedTx = self.getConnection().eth.account.signTransaction(tx, ownerPrivateKey)
 
-        txHash = w3.eth.sendRawTransaction(signedTx.rawTransaction)
-        return w3.toHex(txHash)
+        txHash = self.getConnection().eth.sendRawTransaction(signedTx.rawTransaction)
+        return self.getConnection().toHex(txHash)
 
     # decrease the amount of tokens that an owner allowed to a spender.
     # This function required arguments.
     # owner address, ownerPrivateKey, spender address, token address, amount.
 
-    def decreaseAllowance(tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress, amount):
-        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc20abi)
+    def decreaseAllowance(self, tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress, amount):
 
         owner = Web3.toChecksumAddress(ownerAddress)
         spender = Web3.toChecksumAddress(spenderAddress)
 
-        allowanceAmount = contractInstance.functions.allowance(
-            owner, spender).call()
-        allowanceAmount = (w3.fromWei(allowanceAmount, 'ether'))
+        allowanceAmount = self.allowance(tokenAddr, owner, spender)
+        allowanceAmount = self.getConnection().fromWei(allowanceAmount, 'ether')
 
         if allowanceAmount >= amount:
             totalAmount = allowanceAmount - amount
         else:
             totalAmount = amount - allowanceAmount
 
-        totalAmount = w3.toWei(totalAmount, 'ether')
+        totalAmount = self.getConnection().toWei(totalAmount, 'ether')
 
-        approveData = contractInstance.functions.approve(spender, totalAmount)
+        approveData =  self.getContractInstance(tokenAddr).functions.approve(spender, totalAmount)
 
         hexData = approveData._encode_transaction_data()
 
@@ -271,8 +265,8 @@ def decreaseAllowance(tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress,
 
         estimateGas = approveData.estimateGas()
 
-        nonce = w3.eth.getTransactionCount(owner)
-        gasPrice = w3.eth.gas_price
+        nonce = self.getConnection().eth.getTransactionCount(owner)
+        gasPrice = self.getConnection().eth.gas_price
 
         tx = {
             'nonce': nonce,
@@ -281,26 +275,24 @@ def decreaseAllowance(tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress,
             'gas': estimateGas,
             'gasPrice': gasPrice,
         }
-        signedTx = w3.eth.account.signTransaction(tx, ownerPrivateKey)
+        signedTx = self.getConnection().eth.account.signTransaction(tx, ownerPrivateKey)
 
-        txHash = w3.eth.sendRawTransaction(signedTx.rawTransaction)
-        return w3.toHex(txHash)
+        txHash = self.getConnection().eth.sendRawTransaction(signedTx.rawTransaction)
+        return self.getConnection().toHex(txHash)
 
     # Transfer tokens from one address to another.
     # This function requires following arguments.
     # owner address, spenderPrivateKey, spender address, receiver address, token address, amount.
 
-    def transferFrom(tokenAddr, ownerAddress,  spenderPrivateKey,  spenderAddress, receiver, amount):
-
-        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc20abi)
+    def transferFrom(self, tokenAddr, ownerAddress,  spenderPrivateKey,  spenderAddress, receiver, amount):
 
         owner = Web3.toChecksumAddress(ownerAddress)
         receiverAddres = Web3.toChecksumAddress(receiver)
         spender = Web3.toChecksumAddress(spenderAddress)
 
-        amount = w3.toWei(amount, 'ether')
+        amount = self.getConnection().toWei(amount, 'ether')
 
-        transferData = contractInstance.functions.transferFrom(
+        transferData = self.getContractInstance(tokenAddr).functions.transferFrom(
             owner, receiverAddres, amount)
 
         estimateGas = transferData.estimateGas({
@@ -311,8 +303,8 @@ def transferFrom(tokenAddr, ownerAddress,  spenderPrivateKey,  spenderAddress, r
 
         data = hexstr_if_str(to_bytes, hexData)
 
-        nonce = w3.eth.getTransactionCount(spender)
-        gasPrice = w3.eth.gas_price
+        nonce = self.getConnection().eth.getTransactionCount(spender)
+        gasPrice = self.getConnection().eth.gas_price
 
         tx = {
             'nonce': nonce,
@@ -321,7 +313,7 @@ def transferFrom(tokenAddr, ownerAddress,  spenderPrivateKey,  spenderAddress, r
             'gas': estimateGas,
             'gasPrice': gasPrice,
         }
-        signedTx = w3.eth.account.signTransaction(tx, spenderPrivateKey)
+        signedTx = self.getConnection().eth.account.signTransaction(tx, spenderPrivateKey)
 
-        txHash = w3.eth.sendRawTransaction(signedTx.rawTransaction)
-        return w3.toHex(txHash)
+        txHash = self.getConnection().eth.sendRawTransaction(signedTx.rawTransaction)
+        return self.getConnection().toHex(txHash)
diff --git a/XDC3PYTHON/xrc721.py b/XDC3PYTHON/xrc721.py
index 4852467..2740422 100644
--- a/XDC3PYTHON/xrc721.py
+++ b/XDC3PYTHON/xrc721.py
@@ -3,55 +3,59 @@
     hexstr_if_str,
     to_bytes,
 )
-from decouple import config
-import json
 
 
-rpcUrl = config('NETWORK_URL')
+# xrc721 abi.json
+xrc721abi = "[{\"constant\":true,\"inputs\":[{\"name\":\"interfaceId\",\"type\":\"bytes4\"}],\"name\":\"supportsInterface\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"name\",\"outputs\":[{\"name\":\"\",\"type\":\"string\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"getApproved\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"to\",\"type\":\"address\"},{\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"approve\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"totalSupply\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"from\",\"type\":\"address\"},{\"name\":\"to\",\"type\":\"address\"},{\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"owner\",\"type\":\"address\"},{\"name\":\"index\",\"type\":\"uint256\"}],\"name\":\"tokenOfOwnerByIndex\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"from\",\"type\":\"address\"},{\"name\":\"to\",\"type\":\"address\"},{\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"safeTransferFrom\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"index\",\"type\":\"uint256\"}],\"name\":\"tokenByIndex\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"ownerOf\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"owner\",\"type\":\"address\"}],\"name\":\"balanceOf\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"symbol\",\"outputs\":[{\"name\":\"\",\"type\":\"string\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"to\",\"type\":\"address\"},{\"name\":\"approved\",\"type\":\"bool\"}],\"name\":\"setApprovalForAll\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"from\",\"type\":\"address\"},{\"name\":\"to\",\"type\":\"address\"},{\"name\":\"tokenId\",\"type\":\"uint256\"},{\"name\":\"_data\",\"type\":\"bytes\"}],\"name\":\"safeTransferFrom1\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"tokenURI\",\"outputs\":[{\"name\":\"\",\"type\":\"string\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"_to\",\"type\":\"address\"},{\"name\":\"_tokenId\",\"type\":\"uint256\"},{\"name\":\"_uri\",\"type\":\"string\"}],\"name\":\"mint\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"owner\",\"type\":\"address\"},{\"name\":\"operator\",\"type\":\"address\"}],\"name\":\"isApprovedForAll\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"name\":\"name\",\"type\":\"string\"},{\"name\":\"symbol\",\"type\":\"string\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"name\":\"to\",\"type\":\"address\"},{\"indexed\":true,\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"Transfer\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"owner\",\"type\":\"address\"},{\"indexed\":true,\"name\":\"approved\",\"type\":\"address\"},{\"indexed\":true,\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"Approval\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"owner\",\"type\":\"address\"},{\"indexed\":true,\"name\":\"operator\",\"type\":\"address\"},{\"indexed\":false,\"name\":\"approved\",\"type\":\"bool\"}],\"name\":\"ApprovalForAll\",\"type\":\"event\"}]"
 
-# HTTPProvider:
-w3 = Web3(Web3.HTTPProvider(rpcUrl))
-
-# path of abi file
-with open('./common/xrc721abi.json') as abiJson:
-    xrc721abi = json.load(abiJson)
 
 # This is a class which consists all the methods as per XRC721 standards.
 
 class XRC721:
 
+    def __init__(self,rpcUrl):
+        self.rpcUrl = rpcUrl
+
+    # connection to network.
+
+    def getConnection(self):
+        w3 = Web3(Web3.HTTPProvider(self.rpcUrl))
+        return w3
+    
+    # get contract Instance.
+
+    def getContractInstance(self, tokenAddr):
+        contractInstance = self.getConnection().eth.contract(address=tokenAddr, abi=xrc721abi)
+        return contractInstance
+
     # Gets the Name of the specified address.
     # token address required as an argument.
 
-    def name(tokenAddr):
-        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc721abi)
-        result = contractInstance.functions.name().call()
+    def name(self, tokenAddr):
+        result = self.getContractInstance(tokenAddr).functions.name().call()
         return result
 
     # Gets the Symbol of the specified address.
     # token address required as an argument.
 
-    def symbol(tokenAddr):
-        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc721abi)
-        result = contractInstance.functions.symbol().call()
+    def symbol(self, tokenAddr):
+        result = self.getContractInstance(tokenAddr).functions.symbol().call()
         return result
 
     # Gets the owner of an NFT.
     # required arguments.
     # token address, token id.
 
-    def ownerOf(tokenAddr, tokenId):
-        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc721abi)
-        result = contractInstance.functions.ownerOf(tokenId).call()
+    def ownerOf(self, tokenAddr, tokenId):
+        result = self.getContractInstance(tokenAddr).functions.ownerOf(tokenId).call()
         return result
 
     # Gets the Totalsupply of the specified address.
     # token address required as an argument.
     
-    def totalSupply(tokenAddr):
+    def totalSupply(self, tokenAddr):
         token = Web3.toChecksumAddress(tokenAddr)
-        contractInstance = w3.eth.contract(address=token, abi=xrc721abi)
-        result = contractInstance.functions.totalSupply().call()
+        result = self.getContractInstance(tokenAddr).functions.totalSupply().call()
         resultt = str(result)
         return resultt
 
@@ -59,10 +63,9 @@ def totalSupply(tokenAddr):
     # reuired arguments
     # token address, owner address.
 
-    def balanceOf(tokenAddr, ownerAddress):
-        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc721abi)
+    def balanceOf(self, tokenAddr, ownerAddress):
         owner = Web3.toChecksumAddress(ownerAddress)
-        result = contractInstance.functions.balanceOf(owner).call()
+        result = self.getContractInstance(tokenAddr).functions.balanceOf(owner).call()
         return result
 
     # A distinct Uniform Resource Identifier (URI) for a given asset.
@@ -71,9 +74,8 @@ def balanceOf(tokenAddr, ownerAddress):
     # tokenId The identifier for an NFT.
     # address of the token.
     
-    def tokenURI(tokenAddr, tokenId):
-        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc721abi)
-        result = contractInstance.functions.tokenURI(tokenId).call()
+    def tokenURI(self, tokenAddr, tokenId):
+        result = self.getContractInstance(tokenAddr).functions.tokenURI(tokenId).call()
         return result
 
     # Enumerate NFTs assigned to an owner.
@@ -81,10 +83,9 @@ def tokenURI(tokenAddr, tokenId):
     # IndexNO A counter less than `totalSupply()`.
     # The token identifier for the `index`th NFT assigned to `owner`.
 
-    def tokenByIndex(tokenAddr, index):
+    def tokenByIndex(self, tokenAddr, index):
         token = Web3.toChecksumAddress(tokenAddr)
-        contractInstance = w3.eth.contract(address=token, abi=xrc721abi)
-        result = contractInstance.functions.tokenByIndex(index).call()
+        result = self.getContractInstance(tokenAddr).functions.tokenByIndex(index).call()
         return result
 
     # Enumerate NFTs assigned to an owner.
@@ -92,11 +93,10 @@ def tokenByIndex(tokenAddr, index):
     # required arguments.
     # owner address, token address, token index.
     
-    def tokenofOwnerByIndex(tokenAddr, ownerAddress, index):
+    def tokenofOwnerByIndex(self, tokenAddr, ownerAddress, index):
         token = Web3.toChecksumAddress(tokenAddr)
-        contractInstance = w3.eth.contract(address=token, abi=xrc721abi)
         owner = Web3.toChecksumAddress(ownerAddress)
-        result = contractInstance.functions.tokenOfOwnerByIndex(
+        result = self.getContractInstance(token).functions.tokenOfOwnerByIndex(
             owner, index).call()
         return result
 
@@ -106,10 +106,9 @@ def tokenofOwnerByIndex(tokenAddr, ownerAddress, index):
     #  required arguments.
     # token address, interface id.
 
-    def supportInterface(tokenAddr, interfaceId):
+    def supportInterface(self, tokenAddr, interfaceId):
         token = Web3.toChecksumAddress(tokenAddr)
-        contractInstance = w3.eth.contract(address=token, abi=xrc721abi)
-        result = contractInstance.functions.supportsInterface(
+        result = self.getContractInstance(token).functions.supportsInterface(
             interfaceId).call()
         return result
 
@@ -117,20 +116,18 @@ def supportInterface(tokenAddr, interfaceId):
     # required arguments.
     # token address, tokenId.
 
-    def getApproved(tokenAddr, tokenId):
-        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc721abi)
-        result = contractInstance.functions.getApproved(tokenId).call()
+    def getApproved(self, tokenAddr, tokenId):
+        result = self.getContractInstance(tokenAddr).functions.getApproved(tokenId).call()
         return result
 
     # Tells whether an operator is approved by a given owner.
     # required arguments.
     # owner address, spender address, token address.
 
-    def isApprovedForAll(tokenAddr, ownerAddress, spenderAddress):
-        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc721abi)
+    def isApprovedForAll(self, tokenAddr, ownerAddress, spenderAddress):
         owner = Web3.toChecksumAddress(ownerAddress)
         spender = Web3.toChecksumAddress(spenderAddress)
-        result = contractInstance.functions.isApprovedForAll(
+        result = self.getContractInstance(tokenAddr).functions.isApprovedForAll(
             owner, spender).call()
         return result
 
@@ -140,13 +137,12 @@ def isApprovedForAll(tokenAddr, ownerAddress, spenderAddress):
     # required arguments.
     # tokenAddress, owner address, ownerPrivateKey, spenderAddress, tokenID.
 
-    def approve(tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress, tokenId):
-        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc721abi)
+    def approve(self, tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress, tokenId):
 
         owner = Web3.toChecksumAddress(ownerAddress)
         spender = Web3.toChecksumAddress(spenderAddress)
 
-        approveData = contractInstance.functions.approve(spender, tokenId)
+        approveData = self.getContractInstance(tokenAddr).functions.approve(spender, tokenId)
 
         hexData = approveData._encode_transaction_data()
 
@@ -156,9 +152,9 @@ def approve(tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress, tokenId):
             'from': owner,
         })
 
-        nonce = w3.eth.getTransactionCount(owner)
+        nonce = self.getConnection().eth.getTransactionCount(owner)
 
-        gasPrice = w3.eth.gas_price
+        gasPrice = self.getConnection().eth.gas_price
 
         tx = {
             'nonce': nonce,
@@ -168,23 +164,22 @@ def approve(tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress, tokenId):
             'gasPrice': gasPrice,
         }
 
-        signedTx = w3.eth.account.signTransaction(tx, ownerPrivateKey)
+        signedTx = self.getConnection().eth.account.signTransaction(tx, ownerPrivateKey)
 
-        txHash = w3.eth.sendRawTransaction(signedTx.rawTransaction)
-        return w3.toHex(txHash)
+        txHash = self.getConnection().eth.sendRawTransaction(signedTx.rawTransaction)
+        return self.getConnection().toHex(txHash)
 
     # Enable or disable approval for a third party ("operator") to manage all of `Owner`'s assets
     # Emits the ApprovalForAll event. The contract MUST allow multiple operators per owner.
     # required arguments.
     # token address, owner address, ownerPrivateKey, sepnder address, tokenId.
      
-    def setApprovalForAll(tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress, boolValue):
-        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc721abi)
+    def setApprovalForAll(self, tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress, boolValue):
 
         owner = Web3.toChecksumAddress(ownerAddress)
         spender = Web3.toChecksumAddress(spenderAddress)
 
-        approveData = contractInstance.functions.setApprovalForAll(
+        approveData = self.getContractInstance(tokenAddr).functions.setApprovalForAll(
             spender, boolValue)
 
         hexData = approveData._encode_transaction_data()
@@ -195,9 +190,9 @@ def setApprovalForAll(tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress,
             'from': owner,
         })
 
-        nonce = w3.eth.getTransactionCount(owner)
+        nonce = self.getConnection().eth.getTransactionCount(owner)
 
-        gasPrice = w3.eth.gas_price
+        gasPrice = self.getConnection().eth.gas_price
 
         tx = {
             'nonce': nonce,
@@ -207,25 +202,23 @@ def setApprovalForAll(tokenAddr, ownerAddress, ownerPrivateKey,  spenderAddress,
             'gasPrice': gasPrice,
         }
 
-        signedTx = w3.eth.account.signTransaction(tx, ownerPrivateKey)
+        signedTx = self.getConnection().eth.account.signTransaction(tx, ownerPrivateKey)
 
-        txHash = w3.eth.sendRawTransaction(signedTx.rawTransaction)
-        return w3.toHex(txHash)
+        txHash = self.getConnection().eth.sendRawTransaction(signedTx.rawTransaction)
+        return self.getConnection().toHex(txHash)
 
     # Transfer ownership of an NFT -- THE CALLER IS RESPONSIBLE
     # to confirm that `reciever Address` is capable of receiving NFTs or else they may be permanently lost.
     # required arguments.
     # token address, owner address, spender address, spenderPrivateKey, receiver address, tokenId.
 
-    def transferFrom(tokenAddr, ownerAddress, spenderAddress,  spenderPrivateKey, receiver, tokenId):
-
-        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc721abi)
+    def transferFrom(self, tokenAddr, ownerAddress, spenderAddress,  spenderPrivateKey, receiver, tokenId):
 
         owner = Web3.toChecksumAddress(ownerAddress)
         receiverAddres = Web3.toChecksumAddress(receiver)
         spender = Web3.toChecksumAddress(spenderAddress)
 
-        transferData = contractInstance.functions.transferFrom(
+        transferData = self.getContractInstance(tokenAddr).functions.transferFrom(
             owner, receiverAddres, tokenId)
 
         estimateGas = transferData.estimateGas({
@@ -236,8 +229,8 @@ def transferFrom(tokenAddr, ownerAddress, spenderAddress,  spenderPrivateKey, re
 
         data = hexstr_if_str(to_bytes, hexData)
 
-        nonce = w3.eth.getTransactionCount(spender)
-        gasPrice = w3.eth.gas_price
+        nonce = self.getConnection().eth.getTransactionCount(spender)
+        gasPrice = self.getConnection().eth.gas_price
 
         tx = {
             'nonce': nonce,
@@ -246,27 +239,25 @@ def transferFrom(tokenAddr, ownerAddress, spenderAddress,  spenderPrivateKey, re
             'gas': estimateGas,
             'gasPrice': gasPrice,
         }
-        signedTx = w3.eth.account.signTransaction(tx, spenderPrivateKey)
+        signedTx = self.getConnection().eth.account.signTransaction(tx, spenderPrivateKey)
 
-        txHash = w3.eth.sendRawTransaction(signedTx.rawTransaction)
-        return w3.toHex(txHash)
+        txHash = self.getConnection().eth.sendRawTransaction(signedTx.rawTransaction)
+        return self.getConnection().toHex(txHash)
 
     # Transfers the ownership of an NFT from one address to another address.
     # required arguments.
     # token address, owner address, spender address, spenderPrivateKey, receiver address, tokenId. 
 
-    def safeTransferFrom(tokenAddr, ownerAddress, spenderAddress,  spenderPrivateKey, receiver, tokenId):
-
-        contractInstance = w3.eth.contract(address=tokenAddr, abi=xrc721abi)
+    def safeTransferFrom(self, tokenAddr, ownerAddress, spenderAddress,  spenderPrivateKey, receiver, tokenId):
 
         owner = Web3.toChecksumAddress(ownerAddress)
         receiverAddres = Web3.toChecksumAddress(receiver)
         spender = Web3.toChecksumAddress(spenderAddress)
 
-        transferData = contractInstance.functions.safeTransferFrom(
+        transferData = self.getContractInstance(tokenAddr).functions.safeTransferFrom(
             owner, receiverAddres, tokenId)
 
-        estimateGas = transferData.estimateGas({   
+        estimateGas = transferData.estimateGas({
             'from': spender,
         })
 
@@ -274,8 +265,8 @@ def safeTransferFrom(tokenAddr, ownerAddress, spenderAddress,  spenderPrivateKey
 
         data = hexstr_if_str(to_bytes, hexData)
 
-        nonce = w3.eth.getTransactionCount(spender)
-        gasPrice = w3.eth.gas_price
+        nonce = self.getConnection().eth.getTransactionCount(spender)
+        gasPrice = self.getConnection().eth.gas_price
 
         tx = {
             'nonce': nonce,
@@ -284,7 +275,7 @@ def safeTransferFrom(tokenAddr, ownerAddress, spenderAddress,  spenderPrivateKey
             'gas': estimateGas,
             'gasPrice': gasPrice,
         }
-        signedTx = w3.eth.account.signTransaction(tx, spenderPrivateKey)
+        signedTx = self.getConnection().eth.account.signTransaction(tx, spenderPrivateKey)
 
-        txHash = w3.eth.sendRawTransaction(signedTx.rawTransaction)
-        return w3.toHex(txHash)
+        txHash = self.getConnection().eth.sendRawTransaction(signedTx.rawTransaction)
+        return self.getConnection().toHex(txHash)
diff --git a/common/xrc20abi.json b/common/xrc20abi.json
deleted file mode 100644
index 668d697..0000000
--- a/common/xrc20abi.json
+++ /dev/null
@@ -1,222 +0,0 @@
-[
-    {
-        "constant": true,
-        "inputs": [],
-        "name": "name",
-        "outputs": [
-            {
-                "name": "",
-                "type": "string"
-            }
-        ],
-        "payable": false,
-        "stateMutability": "view",
-        "type": "function"
-    },
-    {
-        "constant": false,
-        "inputs": [
-            {
-                "name": "_spender",
-                "type": "address"
-            },
-            {
-                "name": "_value",
-                "type": "uint256"
-            }
-        ],
-        "name": "approve",
-        "outputs": [
-            {
-                "name": "",
-                "type": "bool"
-            }
-        ],
-        "payable": false,
-        "stateMutability": "nonpayable",
-        "type": "function"
-    },
-    {
-        "constant": true,
-        "inputs": [],
-        "name": "totalSupply",
-        "outputs": [
-            {
-                "name": "",
-                "type": "uint256"
-            }
-        ],
-        "payable": false,
-        "stateMutability": "view",
-        "type": "function"
-    },
-    {
-        "constant": false,
-        "inputs": [
-            {
-                "name": "_from",
-                "type": "address"
-            },
-            {
-                "name": "_to",
-                "type": "address"
-            },
-            {
-                "name": "_value",
-                "type": "uint256"
-            }
-        ],
-        "name": "transferFrom",
-        "outputs": [
-            {
-                "name": "",
-                "type": "bool"
-            }
-        ],
-        "payable": false,
-        "stateMutability": "nonpayable",
-        "type": "function"
-    },
-    {
-        "constant": true,
-        "inputs": [],
-        "name": "decimals",
-        "outputs": [
-            {
-                "name": "",
-                "type": "uint8"
-            }
-        ],
-        "payable": false,
-        "stateMutability": "view",
-        "type": "function"
-    },
-    {
-        "constant": true,
-        "inputs": [
-            {
-                "name": "_owner",
-                "type": "address"
-            }
-        ],
-        "name": "balanceOf",
-        "outputs": [
-            {
-                "name": "balance",
-                "type": "uint256"
-            }
-        ],
-        "payable": false,
-        "stateMutability": "view",
-        "type": "function"
-    },
-    {
-        "constant": true,
-        "inputs": [],
-        "name": "symbol",
-        "outputs": [
-            {
-                "name": "",
-                "type": "string"
-            }
-        ],
-        "payable": false,
-        "stateMutability": "view",
-        "type": "function"
-    },
-    {
-        "constant": false,
-        "inputs": [
-            {
-                "name": "_to",
-                "type": "address"
-            },
-            {
-                "name": "_value",
-                "type": "uint256"
-            }
-        ],
-        "name": "transfer",
-        "outputs": [
-            {
-                "name": "",
-                "type": "bool"
-            }
-        ],
-        "payable": false,
-        "stateMutability": "nonpayable",
-        "type": "function"
-    },
-    {
-        "constant": true,
-        "inputs": [
-            {
-                "name": "_owner",
-                "type": "address"
-            },
-            {
-                "name": "_spender",
-                "type": "address"
-            }
-        ],
-        "name": "allowance",
-        "outputs": [
-            {
-                "name": "",
-                "type": "uint256"
-            }
-        ],
-        "payable": false,
-        "stateMutability": "view",
-        "type": "function"
-    },
-    {
-        "payable": true,
-        "stateMutability": "payable",
-        "type": "fallback"
-    },
-    {
-        "anonymous": false,
-        "inputs": [
-            {
-                "indexed": true,
-                "name": "owner",
-                "type": "address"
-            },
-            {
-                "indexed": true,
-                "name": "spender",
-                "type": "address"
-            },
-            {
-                "indexed": false,
-                "name": "value",
-                "type": "uint256"
-            }
-        ],
-        "name": "Approval",
-        "type": "event"
-    },
-    {
-        "anonymous": false,
-        "inputs": [
-            {
-                "indexed": true,
-                "name": "from",
-                "type": "address"
-            },
-            {
-                "indexed": true,
-                "name": "to",
-                "type": "address"
-            },
-            {
-                "indexed": false,
-                "name": "value",
-                "type": "uint256"
-            }
-        ],
-        "name": "Transfer",
-        "type": "event"
-    }
-]
\ No newline at end of file
diff --git a/common/xrc721abi.json b/common/xrc721abi.json
deleted file mode 100644
index b0c0a3f..0000000
--- a/common/xrc721abi.json
+++ /dev/null
@@ -1,366 +0,0 @@
-[{
-    "constant": true,
-    "inputs": [{
-        "name": "interfaceId",
-        "type": "bytes4"
-    }],
-    "name": "supportsInterface",
-    "outputs": [{
-        "name": "",
-        "type": "bool"
-    }],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-},
-{
-    "constant": true,
-    "inputs": [],
-    "name": "name",
-    "outputs": [{
-        "name": "",
-        "type": "string"
-    }],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-},
-{
-    "constant": true,
-    "inputs": [{
-        "name": "tokenId",
-        "type": "uint256"
-    }],
-    "name": "getApproved",
-    "outputs": [{
-        "name": "",
-        "type": "address"
-    }],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-},
-{
-    "constant": false,
-    "inputs": [{
-            "name": "to",
-            "type": "address"
-        },
-        {
-            "name": "tokenId",
-            "type": "uint256"
-        }
-    ],
-    "name": "approve",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-},
-{
-    "constant": true,
-    "inputs": [],
-    "name": "totalSupply",
-    "outputs": [{
-        "name": "",
-        "type": "uint256"
-    }],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-},
-{
-    "constant": false,
-    "inputs": [{
-            "name": "from",
-            "type": "address"
-        },
-        {
-            "name": "to",
-            "type": "address"
-        },
-        {
-            "name": "tokenId",
-            "type": "uint256"
-        }
-    ],
-    "name": "transferFrom",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-},
-{
-    "constant": true,
-    "inputs": [{
-            "name": "owner",
-            "type": "address"
-        },
-        {
-            "name": "index",
-            "type": "uint256"
-        }
-    ],
-    "name": "tokenOfOwnerByIndex",
-    "outputs": [{
-        "name": "",
-        "type": "uint256"
-    }],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-},
-{
-    "constant": false,
-    "inputs": [{
-            "name": "from",
-            "type": "address"
-        },
-        {
-            "name": "to",
-            "type": "address"
-        },
-        {
-            "name": "tokenId",
-            "type": "uint256"
-        }
-    ],
-    "name": "safeTransferFrom",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-},
-{
-    "constant": true,
-    "inputs": [{
-        "name": "index",
-        "type": "uint256"
-    }],
-    "name": "tokenByIndex",
-    "outputs": [{
-        "name": "",
-        "type": "uint256"
-    }],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-},
-{
-    "constant": true,
-    "inputs": [{
-        "name": "tokenId",
-        "type": "uint256"
-    }],
-    "name": "ownerOf",
-    "outputs": [{
-        "name": "",
-        "type": "address"
-    }],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-},
-{
-    "constant": true,
-    "inputs": [{
-        "name": "owner",
-        "type": "address"
-    }],
-    "name": "balanceOf",
-    "outputs": [{
-        "name": "",
-        "type": "uint256"
-    }],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-},
-{
-    "constant": true,
-    "inputs": [],
-    "name": "symbol",
-    "outputs": [{
-        "name": "",
-        "type": "string"
-    }],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-},
-{
-    "constant": false,
-    "inputs": [{
-            "name": "to",
-            "type": "address"
-        },
-        {
-            "name": "approved",
-            "type": "bool"
-        }
-    ],
-    "name": "setApprovalForAll",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-},
-{
-    "constant": false,
-    "inputs": [{
-            "name": "from",
-            "type": "address"
-        },
-        {
-            "name": "to",
-            "type": "address"
-        },
-        {
-            "name": "tokenId",
-            "type": "uint256"
-        },
-        {
-            "name": "_data",
-            "type": "bytes"
-        }
-    ],
-    "name": "safeTransferFrom1",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-},
-{
-    "constant": true,
-    "inputs": [{
-        "name": "tokenId",
-        "type": "uint256"
-    }],
-    "name": "tokenURI",
-    "outputs": [{
-        "name": "",
-        "type": "string"
-    }],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-},
-{
-    "constant": false,
-    "inputs": [{
-            "name": "_to",
-            "type": "address"
-        },
-        {
-            "name": "_tokenId",
-            "type": "uint256"
-        },
-        {
-            "name": "_uri",
-            "type": "string"
-        }
-    ],
-    "name": "mint",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-},
-{
-    "constant": true,
-    "inputs": [{
-            "name": "owner",
-            "type": "address"
-        },
-        {
-            "name": "operator", 
-            "type": "address"
-        }
-    ],
-    "name": "isApprovedForAll",
-    "outputs": [{
-        "name": "",
-        "type": "bool"
-    }],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-},
-{
-    "inputs": [{
-            "name": "name",
-            "type": "string"
-        },
-        {
-            "name": "symbol",
-            "type": "string"
-        }
-    ],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "constructor"
-},
-{
-    "anonymous": false,
-    "inputs": [{
-            "indexed": true,
-            "name": "from",
-            "type": "address"
-        },
-        {
-            "indexed": true,
-            "name": "to",
-            "type": "address"
-        },
-        {
-            "indexed": true,
-            "name": "tokenId",
-            "type": "uint256"
-        }
-    ],
-    "name": "Transfer",
-    "type": "event"
-},
-{
-    "anonymous": false,
-    "inputs": [{
-            "indexed": true,
-            "name": "owner",
-            "type": "address"
-        },
-        {
-            "indexed": true,
-            "name": "approved",
-            "type": "address"
-        },
-        {
-            "indexed": true,
-            "name": "tokenId",
-            "type": "uint256"
-        }
-    ],
-    "name": "Approval",
-    "type": "event"
-},
-{
-    "anonymous": false,
-    "inputs": [{
-            "indexed": true,
-            "name": "owner",
-            "type": "address"
-        },
-        {
-            "indexed": true,
-            "name": "operator",
-            "type": "address"
-        },
-        {
-            "indexed": false,
-            "name": "approved",
-            "type": "bool"
-        }
-    ],
-    "name": "ApprovalForAll",
-    "type": "event"
-}
-]
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 69516d0..28e3abe 100644
--- a/setup.py
+++ b/setup.py
@@ -4,8 +4,8 @@
 
 setup(
     name = 'XDC3PYTHON',
-    version = '1.0.0',
-    description = 'XDC RUST SDK with support for smart contracts, XRC20 & XRC721',
+    version = '1.0.1',
+    description = 'XDC PYTHON SDK with support for smart contracts, XRC20 & XRC721',
     long_description=open('README.md').read(),
     url='https://github.com/XDCFoundation/XDC_Python_SDK_V1.git',
     author='XDC Foundation',

From 4584574c70bd0c856de12971b44cf7c5c4909888 Mon Sep 17 00:00:00 2001
From: lhtsaurabhsingh <saurabhp@leewayhertz.com>
Date: Wed, 11 May 2022 17:40:42 +0530
Subject: [PATCH 3/5] python xdc sdk xrc20 and xrc721 methods

---
 XDC3PYTHON/xrc20.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/XDC3PYTHON/xrc20.py b/XDC3PYTHON/xrc20.py
index af78d2f..03fe905 100644
--- a/XDC3PYTHON/xrc20.py
+++ b/XDC3PYTHON/xrc20.py
@@ -1,4 +1,3 @@
-from lib2to3.pgen2 import token
 from web3 import Web3
 from web3._utils.encoding import (
     hexstr_if_str,

From e063a177a63012b11487a8c6bfaf6d71fbf5f50d Mon Sep 17 00:00:00 2001
From: lhtsaurabhsingh <saurabhp@leewayhertz.com>
Date: Thu, 12 May 2022 18:25:17 +0530
Subject: [PATCH 4/5] Readme updated

---
 README.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/README.md b/README.md
index 4b64951..ebd8600 100644
--- a/README.md
+++ b/README.md
@@ -67,6 +67,11 @@ This example returns symbol of the specified address.
 
 **HTTP transport**
 
+## Required Data Types
+ **Token Address** - `str type`
+ **Account Address** - `str type`
+ **amount** & **tokenId** - `int type`
+
 ### Author
 [XDCFoundation](https://github.com/XDCFoundation/XDC_Python_SDK_V1)
 

From 66fa7e5dea1afa40be77f29200876e9ab0088403 Mon Sep 17 00:00:00 2001
From: Jon McBee <86977117+WalterBlueu@users.noreply.github.com>
Date: Wed, 7 Sep 2022 14:14:45 -0400
Subject: [PATCH 5/5] Rename LICENCE.txt to LICENSE.txt

---
 LICENCE.txt => LICENSE.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 rename LICENCE.txt => LICENSE.txt (98%)

diff --git a/LICENCE.txt b/LICENSE.txt
similarity index 98%
rename from LICENCE.txt
rename to LICENSE.txt
index 1ef92da..7fc6409 100644
--- a/LICENCE.txt
+++ b/LICENSE.txt
@@ -4,4 +4,4 @@ Permission is hereby granted, free of charge, to any person obtaining a copy of
 
 The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 
-THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
\ No newline at end of file
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.