The Aztec 2.0 system consists of the following sub projects.
barretenberg- C++ cryptographic library.barretenberg.js- TypeScript wrapper around WASM build of barretenberg.blockchain- Solidity smart contracts and TypeScript to interact with them.falafel- Rollup server.sdk- SDK for interacting with a rollup provider.
Previous bugs fixed: https://medium.com/aztec-protocol/vulnerabilities-found-in-aztec-2-0-9b80c8bf416c.com:AztecProtocol/barretenberg.git