# Tari Crypto
[](https://coveralls.io/github/tari-project/tari-crypto?branch=main)
This crate is part of the [Tari Cryptocurrency](https://tari.com) project.
Major features of this library include:
* Pedersen commitments
* Schnorr Signatures
* Generic Public and Secret Keys
* [Musig!](https://blockstream.com/2018/01/23/musig-key-aggregation-schnorr-signatures/)
The `tari_crypto` crate makes heavy use of the excellent [Dalek](https://github.com/dalek-cryptography/curve25519-dalek)
libraries. The default implementation for Tari ECC is the [Ristretto255 curve](https://ristretto.group).
# Compiling to WebAssembly
To build the WebAssembly module, the `wasm` feature must be enabled:
$ wasm-pack build . -- --features "wasm"
To generate a module for use in node.js, use this command:
$ wasm-pack build --target nodejs -d tari_js . -- --features "wasm"
## Example (Node.js)
```js
const keys = KeyRing.new();
// Create new keypair
keys.new_key("Alice");
keys.new_key("Bob");
console.log(`${keys.len()} keys in ring`); // 2
console.log("kA = ", keys.private_key("Alice"));
console.log("PB = ", keys.public_key("Bob"));
keys.free();
````
# Benchmarks
To run the benchmarks:
$ cargo bench
The benchmarks use Criterion and will produce nice graphs (if you have gnuplot installed)
To run the benchmarks with SIMD instructions:
$ cargo bench --features "avx2"
# Change log
## v0.2.0
### General
* WASM and crate version now match. Eliminate that confusion.
### WASM module
* Breaking change: `KeyRing.sign` doesn't take a nonce any more. It's not needed, and why risk someone re-using it?
* New method: `key_utils.sign` to sign keys not in the key ring
* New module: Commitments