# merkle-generator
Rust version of [mafintosh/merkle-tree-stream](https://github.com/mafintosh/merkle-tree-stream). Generate a merkle tree based on incoming data.
![Cargo Version](https://img.shields.io/crates/v/merkle-generator.svg)
```
merkle-generator = "0.1.2"
```
## Usage
```rust
extern crate merkle_generator;
// define how to hash incoming data
fn parent(a: &Node, b: &Node) -> Vec<u8> {
let ref mut hash = a.hash.clone();
hash.extend(b.hash.iter().cloned());
digest::digest(&digest::SHA256, data.as_slice())
.as_ref()
.to_vec()
}
// define how to hash two merkle tree node hashes into a new parent hash
fn leaf(leaf: &Node, roots: &Vec<Node>) -> Vec<u8> {
let data = leaf.data.clone().unwrap();
digest::digest(&digest::SHA256, data.as_slice()).as_ref().to_vec()
}
let mut gen = Generator::new(leaf, parent);
let nodes = gen.next(b"Hello World".to_vec());
println!("{:?}", nodes);
```
## Tree Structure
See [mafintosh/flat-tree-rs](https://github.com/mafintosh/flat-tree-rs) for more information about how node/parent indexes are calculated.
## License
The MIT License