From cd5178d61da10cd4e8f55f48c93ad4a1b808ffa7 Mon Sep 17 00:00:00 2001
From: KOSASIH <kosasihg88@gmail.com>
Date: Sun, 15 Sep 2024 14:00:57 +0700
Subject: [PATCH] Create decentralized_identity_management.py

---
 .../decentralized_identity_management.py      | 75 +++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 advanced_feature/decentralized_identity_management/decentralized_identity_management.py

diff --git a/advanced_feature/decentralized_identity_management/decentralized_identity_management.py b/advanced_feature/decentralized_identity_management/decentralized_identity_management.py
new file mode 100644
index 000000000..c45b3b633
--- /dev/null
+++ b/advanced_feature/decentralized_identity_management/decentralized_identity_management.py
@@ -0,0 +1,75 @@
+import hashlib
+import hmac
+import os
+import secrets
+from cryptography.hazmat.primitives import hashes
+from cryptography.hazmat.primitives.asymmetric import ec
+from cryptography.hazmat.primitives import serialization
+from cryptography.hazmat.backends import default_backend
+from web3 import Web3, HTTPProvider
+from web3.contract import Contract
+
+class DecentralizedIdentityManagement:
+    def __init__(self):
+        self.backend = default_backend()
+        self.web3 = Web3(HTTPProvider('https://mainnet.infura.io/v3/YOUR_PROJECT_ID'))
+        self.contract_address = '0x...YOUR_CONTRACT_ADDRESS...'
+        self.contract_abi = [...YOUR_CONTRACT_ABI...]
+
+    def generate_keypair(self):
+        # Generate a decentralized identity keypair using the ECDSA algorithm
+        private_key = ec.generate_private_key(ec.SECP256K1(), default_backend())
+        public_key = private_key.public_key()
+        return private_key, public_key
+
+    def create_identity(self, user_data):
+        # Create a decentralized identity using the generated keypair
+        private_key, public_key = self.generate_keypair()
+        identity = {
+            'public_key': public_key.public_bytes(
+                encoding=serialization.Encoding.OpenSSH,
+                format=serialization.PublicFormat.OpenSSH
+            ),
+            'user_data': user_data
+        }
+        return identity
+
+    def register_identity(self, identity):
+        # Register the decentralized identity on the blockchain
+        contract = self.web3.eth.contract(address=self.contract_address, abi=self.contract_abi)
+        tx_hash = contract.functions.registerIdentity(identity['public_key'], identity['user_data']).transact()
+        self.web3.eth.waitForTransactionReceipt(tx_hash)
+
+    def authenticate(self, public_key, user_data):
+        # Authenticate the user using the decentralized identity
+        contract = self.web3.eth.contract(address=self.contract_address, abi=self.contract_abi)
+        authenticated = contract.functions.authenticate(public_key, user_data).call()
+        return authenticated
+
+    def update_identity(self, identity, updated_user_data):
+        # Update the decentralized identity on the blockchain
+        contract = self.web3.eth.contract(address=self.contract_address, abi=self.contract_abi)
+        tx_hash = contract.functions.updateIdentity(identity['public_key'], updated_user_data).transact()
+        self.web3.eth.waitForTransactionReceipt(tx_hash)
+
+def main():
+    # Initialize Decentralized Identity Management system
+    dim = DecentralizedIdentityManagement()
+
+    # Create a decentralized identity
+    user_data = {'name': 'John Doe', 'email': 'johndoe@example.com'}
+    identity = dim.create_identity(user_data)
+
+    # Register the decentralized identity on the blockchain
+    dim.register_identity(identity)
+
+    # Authenticate the user using the decentralized identity
+    authenticated = dim.authenticate(identity['public_key'], user_data)
+    print('Authenticated:', authenticated)
+
+    # Update the decentralized identity on the blockchain
+    updated_user_data = {'name': 'Jane Doe', 'email': 'janedoe@example.com'}
+    dim.update_identity(identity, updated_user_data)
+
+if __name__ == '__main__':
+    main()