This repository contains a simplified implementation of a Blockchain, Merkle Tree, Zk-SNARK and Zk-Rollup. The main focus of this repository is to provide a simplified and easy to understand codebase for understanding the underlying concepts and principles of these technologies.
These instructions will get you a copy of the project up and running on your local machine for development and testing purposes.
This repository uses Rust, so you'll need to have a Rust development environment set up on your machine in order to run the code. You can download and install Rust here.
This repository contains the implementation of Simplified zk-SNARK, Simplified Merkle Tree, Simplified Zk-Rollup and Simplified Blockchain. All data passed and all variables used are of type Vec<u8> instead of other types.
The zksnark module provides a simplified implementation of zk-SNARKs. It includes a ProvingKey struct, a VerificationKey struct, and a create_proof() and verify_proof() function to generate and verify zk-SNARK proofs.
The merkle_tree module provides a simple implementation of a Merkle tree. It includes a MerkleTree struct that takes in a vector of data and provides the root of the Merkle tree as well as the ability to verify inclusion of a leaf in the tree.
The ZkRollupTransaction struct is used to construct a zero knowledge proof for a Rollup transaction on the blockchain. It includes inputs, outputs, public_inputs, snark_proof, and snark_input fields, and a new() and verify() functions to generate and verify Zk-RollupTransaction.
The Blockchain struct is a simple implementation of a blockchain. it stores a collection of ZkRollupTransactions in a HashMap with the keys as the SHA-256 hash of the snark_input of each transaction. It has a new() function that creates a new instance of the blockchain struct, it takes proving_key and the verification_key as input. and it has add_transaction method which takes inputs and outputs as Vec and creates a new transaction using those inputs and outputs, then it calculates the SHA-256 hash of the snark_input and stores the transaction in the chain with the hash as the key.
This repository is intended as a learning tool and is not meant for production use. However, if you find any bugs or would like to improve the code, please feel free to open an issue or a pull request.
- Denis Murphy
This project is licensed under the MIT License
- This repository is inspired by the work of many great researchers and developers in the blockchain and cryptography communities.
- This is a simplified version of the complex technologies and must be used for educational purposes only.