Gas Optimisation Bounty Challenge

In this challenge, the goal is to optimize a smart contract by applying various gas optimization techniques to reduce the cost of deploying and executing the contract.

Smart Contract Changes

The following gas optimization techniques have been implemented in the gasChallenge.sol smart contract:

1. Fixed Size Arrays over Dynamic Arrays: The numbers array has been changed to a fixed-size array (uint[10]) instead of a dynamic array (uint[]) to reduce gas costs associated with dynamic memory allocation.

2. Caching of State Variables: The sum of the array elements (sumOfArray) is cached in a private state variable during contract deployment. This avoids recalculating the sum every time the isSumOfArrayZero function is called, reducing gas costs.

3. Unchecked Block: The notOptimizedFunction uses the unchecked block to suppress runtime checks for overflow and underflow. This can save gas if you're certain the operations won't result in overflow/underflow.

4. Different For Loop Increment Syntax: The optimizedFunction uses the ++i increment syntax instead of i++. This can be slightly more gas-efficient as it avoids the creation of a temporary variable during the increment.

Unit Test

The test_gasChallenge.js unit test file has been updated to test the gas optimizations and ensure the functionality of the smart contract is preserved. The following test cases have been added:

1. Compute Gas: This test case checks if the optimized function optimizedFunction consumes less gas than the original function notOptimizedFunction. It verifies that the optimization techniques have successfully reduced gas costs.

2. Check Sum Of Array: This test case checks if the sum of the array elements is zero after executing the optimized function optimizedFunction. It calls the isSumOfArrayZero function and asserts that the returned value is true.

Getting Started

To get started with the Gas Optimisation Bounty Challenge, follow these steps:

1. Clone the GitHub repository: link-to-repository

2. To get started, clone this repository to your local machine and navigate to the project directory. Next, install the required dependencies.

git clone https://github.com/JasbirCodeSpace/Gas-Optimisation-Challenge.git cd gas_challenge && npm install

4. Run the unit tests using a testing framework like Hardhat or Truffle.

npx hardhat test

5. Verify that the gas consumption is reduced in the optimized function and the sum of the array elements is zero after optimization.