Rust implementation of NextGraph, a Decentralized and local-first web 3.0 ecosystem https://nextgraph.org
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nextgraph-rs/ng-verifier/src/verifier.rs

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// Copyright (c) 2022-2024 Niko Bonnieure, Par le Peuple, NextGraph.org developers
// All rights reserved.
// Licensed under the Apache License, Version 2.0
// <LICENSE-APACHE2 or http://www.apache.org/licenses/LICENSE-2.0>
// or the MIT license <LICENSE-MIT or http://opensource.org/licenses/MIT>,
// at your option. All files in the project carrying such
// notice may not be copied, modified, or distributed except
// according to those terms.
//! Repo object (on heap) to handle a Repository
use crate::types::*;
use ng_repo::log::*;
use ng_repo::object::Object;
use ng_repo::{
block_storage::BlockStorage,
errors::{NgError, StorageError},
file::RandomAccessFile,
repo::Repo,
store::Store,
types::*,
utils::{generate_keypair, sign},
};
use core::fmt;
//use oxigraph::io::{RdfFormat, RdfParser, RdfSerializer};
//use oxigraph::store::Store;
//use oxigraph::model::GroundQuad;
#[cfg(not(target_family = "wasm"))]
use crate::rocksdb_user_storage::RocksDbUserStorage;
use crate::user_storage::{InMemoryUserStorage, UserStorage};
use async_std::sync::Mutex;
use std::{collections::HashMap, path::PathBuf, sync::Arc};
use ng_net::{
connection::NoiseFSM,
errors::ProtocolError,
types::*,
utils::{Receiver, Sender},
};
use serde::{Deserialize, Serialize};
use web_time::SystemTime;
//use yrs::{StateVector, Update};
pub struct Verifier {
pub config: VerifierConfig,
pub connected_server_id: Option<PubKey>,
graph_dataset: Option<oxigraph::store::Store>,
user_storage: Option<Box<dyn UserStorage>>,
block_storage: Option<Arc<std::sync::RwLock<dyn BlockStorage + Send + Sync>>>,
last_seq_num: u64,
peer_id: PubKey,
max_reserved_seq_num: u64,
last_reservation: SystemTime,
stores: HashMap<OverlayId, Store>,
repos: HashMap<RepoId, Repo>,
}
impl fmt::Debug for Verifier {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
writeln!(f, "Verifier\nconfig: {:?}", self.config)?;
writeln!(f, "connected_server_id: {:?}", self.connected_server_id)
}
}
impl Verifier {
#[cfg(test)]
pub fn new_dummy() -> Self {
let (peer_priv_key, peer_id) = generate_keypair();
let block_storage = Arc::new(RwLock::new(HashMapBlockStorage::new()))
as Arc<RwLock<Box<dyn BlockStorage + Send + Sync + 'static>>>;
Verifier {
config: VerifierConfig {
config_type: VerifierConfigType::Memory,
user_master_key: [0; 32],
peer_priv_key,
user_priv_key: PrivKey::random_ed(),
private_store_read_cap: ObjectRef::dummy(),
},
connected_server_id: None,
graph_dataset: None,
user_storage: None,
block_storage: Some(block_storage),
last_seq_num: 0,
peer_id,
max_reserved_seq_num: 1,
last_reservation: SystemTime::now(),
stores: HashMap::new(),
repos: HashMap::new(),
}
}
pub fn get_store(&mut self, store_repo: &StoreRepo) -> &mut Store {
let overlay_id = store_repo.overlay_id_for_storage_purpose();
if self.stores.get(&overlay_id).is_none() {
// FIXME: get store_readcap from user storage
let store_readcap = ReadCap::nil();
let store = Store::new(
*store_repo,
store_readcap,
Arc::clone(
&self
.block_storage
.as_ref()
.ok_or(core::fmt::Error)
.expect("get_store cannot be called on Remote Verifier"),
),
);
//self.stores.insert(overlay_id, store);
let store = self.stores.entry(overlay_id).or_insert(store);
store
} else {
self.stores.get_mut(&overlay_id).unwrap()
}
}
pub(crate) fn new_event(
&mut self,
//publisher: &PrivKey,
//seq: &mut u64,
commit: &Commit,
additional_blocks: &Vec<BlockId>,
//topic_id: TopicId,
//topic_priv_key: &BranchWriteCapSecret,
store: &Store, // store could be omitted and a store repo ID would be given instead.
) -> Result<Event, NgError> {
let topic_id = TopicId::nil(); // should be fetched from user storage, based on the Commit.branch
let topic_priv_key = BranchWriteCapSecret::nil(); // should be fetched from user storage, based on repoId found in user storage (search by branchId)
let seq = self.last_seq_number()?;
Event::new(
&self.config.peer_priv_key,
seq,
commit,
additional_blocks,
topic_id,
&topic_priv_key,
store,
)
}
pub(crate) fn last_seq_number(&mut self) -> Result<u64, NgError> {
if self.last_seq_num - 1 >= self.max_reserved_seq_num {
self.reserve_more(1)?;
}
self.last_seq_num += 1;
Ok(self.last_seq_num)
}
pub(crate) fn new_events(
&mut self,
events: Vec<(Commit, Vec<Digest>)>,
store: &Store,
) -> Result<Vec<Event>, NgError> {
let missing_count = events.len() as i64 - self.available_seq_nums() as i64;
// this is reducing the capacity of reserver_seq_num by half (cast from u64 to i64)
// but we will never reach situation where so many seq_nums are reserved, neither such a big list of events to processs
if missing_count >= 0 {
self.reserve_more(missing_count as u64 + 1)?;
}
let mut res = vec![];
for event in events {
let topic_id = TopicId::nil(); // should be fetched from user storage, based on the Commit.branch
let topic_priv_key = BranchWriteCapSecret::nil(); // should be fetched from user storage, based on repoId found in user storage (search by branchId)
self.last_seq_num += 1;
let event = Event::new(
&self.config.peer_priv_key,
self.last_seq_num,
&event.0,
&event.1,
topic_id,
&topic_priv_key,
store,
)?;
res.push(event);
}
Ok(res)
}
fn available_seq_nums(&self) -> u64 {
self.max_reserved_seq_num - self.last_seq_num
}
fn reserve_more(&mut self, at_least: u64) -> Result<(), NgError> {
// the qty should be calculated based on the last_reservation. the closer to now, the higher the qty.
// below 1 sec, => 100
// below 5 sec, => 10
// below 10 sec => 1
self.take_some_peer_last_seq_numbers(10)
}
fn take_some_peer_last_seq_numbers(&mut self, qty: u16) -> Result<(), NgError> {
// TODO the magic
Ok(())
}
pub fn new(
config: VerifierConfig,
block_storage: Arc<std::sync::RwLock<dyn BlockStorage + Send + Sync>>,
) -> Result<Self, NgError> {
let (graph, user, block) = match &config.config_type {
VerifierConfigType::Memory | VerifierConfigType::JsSaveSession(_) => (
Some(oxigraph::store::Store::new().unwrap()),
Some(Box::new(InMemoryUserStorage::new()) as Box<dyn UserStorage>),
Some(block_storage),
),
#[cfg(not(target_family = "wasm"))]
VerifierConfigType::RocksDb(path) => (
// FIXME BIG TIME: we are reusing the same encryption key here.
// this is very temporary, until we remove the code in oxi_rocksdb of oxigraph,
// and have oxigraph use directly the UserStorage
Some(oxigraph::store::Store::open_with_key(path, config.user_master_key).unwrap()),
Some(
Box::new(RocksDbUserStorage::open(path, config.user_master_key)?)
as Box<dyn UserStorage>,
),
Some(block_storage),
),
VerifierConfigType::Remote(_) => (None, None, None),
_ => unimplemented!(), // can be WebRocksDb or RocksDb on wasm platforms
};
let peer_id = config.peer_priv_key.to_pub();
let mut verif = Verifier {
config,
connected_server_id: None,
graph_dataset: graph,
user_storage: user,
block_storage: block,
peer_id,
last_reservation: SystemTime::now(),
max_reserved_seq_num: 0,
last_seq_num: 0,
stores: HashMap::new(),
repos: HashMap::new(),
};
verif.take_some_peer_last_seq_numbers(1)?;
Ok(verif)
}
pub fn doc_fetch(
&mut self,
nuri: String,
payload: Option<AppRequestPayload>,
) -> Result<(Receiver<AppResponse>, CancelFn), NgError> {
unimplemented!();
}
pub async fn respond(
&mut self,
msg: ProtocolMessage,
fsm: Arc<Mutex<NoiseFSM>>,
) -> Result<(), ProtocolError> {
unimplemented!();
}
/// returns the Repo and the last seq_num of the peer
pub fn new_repo_default<'a>(
&'a mut self,
creator: &UserId,
creator_priv_key: &PrivKey,
//store_repo: &StoreRepo,
store: Box<Store>,
) -> Result<(&'a Repo, Vec<Event>), NgError> {
//let store = self.get_store(store_repo);
let (repo, proto_events) = store.create_repo_default(creator, creator_priv_key)?;
//repo.store = Some(store);
let events = self.new_events(proto_events, &repo.store)?;
let repo_ref = self.repos.entry(repo.id).or_insert(repo);
Ok((repo_ref, events))
}
}
#[cfg(test)]
mod test {
use crate::types::*;
use crate::verifier::*;
use ng_repo::log::*;
#[test]
pub fn test_new_repo_default() {
let (creator_priv_key, creator_pub_key) = generate_keypair();
let (publisher_privkey, publisher_pubkey) = generate_keypair();
let publisher_peer = PeerId::Forwarded(publisher_pubkey);
let store = Store::dummy_public_v0();
let mut verifier = Verifier::new_dummy();
//let store = verifier.get_store(store_repo);
let (repo, events) = verifier
.new_repo_default(&creator_pub_key, &creator_priv_key, store)
.expect("new_default");
log_debug!("REPO OBJECT {}", repo);
log_debug!("events: {}\n", events.len());
let mut i = 0;
for e in events {
log_debug!("========== EVENT {:03}: {}", i, e);
i += 1;
}
assert_eq!(verifier.last_seq_number(), 6);
}
}