diff --git a/blockchain_integration/pi_network/contracts/PI-bank/utils/PIBankUtils.sol b/blockchain_integration/pi_network/contracts/PI-bank/utils/PIBankUtils.sol
new file mode 100644
index 000000000..696d6987d
--- /dev/null
+++ b/blockchain_integration/pi_network/contracts/PI-bank/utils/PIBankUtils.sol
@@ -0,0 +1,15 @@
+pragma solidity ^0.8.0;
+
+library PIBankUtils {
+    function calculateInterestRate(uint256 _balance, uint256 _interestRate) internal pure returns (uint256) {
+        return _balance * _interestRate / 100;
+    }
+
+    function generateRandomNumber(uint256 _seed) internal view returns (uint256) {
+        return uint256(keccak256(abi.encodePacked(_seed, block.timestamp)));
+    }
+
+    function encodeData(string memory _data) internal pure returns (bytes memory) {
+        return abi.encodePacked(_data);
+    }
+}