Create blockchain_utils.py

blockchain_integration/pi_network/daictd/blockchain/smart_contracts/blockchain_utils.py

@@ -0,0 +1,27 @@
+import os
+import json
+from web3 import Web3, HTTPProvider
+
+def get_web3_provider():
+    return Web3(HTTPProvider('https://mainnet.infura.io/v3/YOUR_PROJECT_ID'))
+
+def get_contract_instance(contract_address, abi):
+    w3 = get_web3_provider()
+    return w3.eth.contract(address=contract_address, abi=abi)
+
+def deploy_contract(w3, contract_interface):
+    tx_hash = w3.eth.contract(bytecode=contract_interface['bytecode'], abi=contract_interface['abi']).constructor().transact()
+    tx_receipt = w3.eth.wait_for_transaction_receipt(tx_hash)
+    return tx_receipt.contractAddress
+
+def load_contract_interface(contract_name):
+    with open(f'contracts/{contract_name}.json', 'r') as f:
+        return json.load(f)
+
+def get_contract_address(contract_name):
+    with open(f'contracts/{contract_name}_address.txt', 'r') as f:
+        return f.read()
+
+def save_contract_address(contract_name, contract_address):
+    with open(f'contracts/{contract_name}_address.txt', 'w') as f:
+        f.write(contract_address)