miden_client/sync/
mod.rs

1//! Provides the client APIs for synchronizing the client's local state with the Miden
2//! network. It ensures that the client maintains a valid, up-to-date view of the chain.
3//!
4//! ## Overview
5//!
6//! This module handles the synchronization process between the local client and the Miden network.
7//! The sync operation involves:
8//!
9//! - Querying the Miden node for state updates using tracked account IDs, note tags, and nullifier
10//!   prefixes.
11//! - Processing the received data to update note inclusion proofs, reconcile note state (new,
12//!   committed, or consumed), and update account states.
13//! - Incorporating new block headers and updating the local Merkle Mountain Range (MMR) with new
14//!   peaks and authentication nodes.
15//! - Aggregating transaction updates to determine which transactions have been committed or
16//!   discarded.
17//!
18//! The result of the synchronization process is captured in a [`SyncSummary`], which provides
19//! a summary of the new block number along with lists of received, committed, and consumed note
20//! IDs, updated account IDs, locked accounts, and committed transaction IDs.
21//!
22//! Once the data is requested and retrieved, updates are persisted in the client's store.
23//!
24//! ## Examples
25//!
26//! The following example shows how to initiate a state sync and handle the resulting summary:
27//!
28//! ```rust
29//! # use miden_client::auth::TransactionAuthenticator;
30//! # use miden_client::sync::SyncSummary;
31//! # use miden_client::{Client, ClientError};
32//! # use miden_objects::{block::BlockHeader, Felt, Word, StarkField};
33//! # use miden_objects::crypto::rand::FeltRng;
34//! # async fn run_sync<AUTH: TransactionAuthenticator + Sync + 'static>(client: &mut Client<AUTH>) -> Result<(), ClientError> {
35//! // Attempt to synchronize the client's state with the Miden network.
36//! // The requested data is based on the client's state: it gets updates for accounts, relevant
37//! // notes, etc. For more information on the data that gets requested, see the doc comments for
38//! // `sync_state()`.
39//! let sync_summary: SyncSummary = client.sync_state().await?;
40//!
41//! println!("Synced up to block number: {}", sync_summary.block_num);
42//! println!("Committed notes: {}", sync_summary.committed_notes.len());
43//! println!("Consumed notes: {}", sync_summary.consumed_notes.len());
44//! println!("Updated accounts: {}", sync_summary.updated_accounts.len());
45//! println!("Locked accounts: {}", sync_summary.locked_accounts.len());
46//! println!("Committed transactions: {}", sync_summary.committed_transactions.len());
47//!
48//! Ok(())
49//! # }
50//! ```
51//!
52//! The `sync_state` method loops internally until the client is fully synced to the network tip.
53//!
54//! For more advanced usage, refer to the individual functions (such as
55//! `committed_note_updates` and `consumed_note_updates`) to understand how the sync data is
56//! processed and applied to the local store.
57
58use alloc::collections::BTreeSet;
59use alloc::sync::Arc;
60use alloc::vec::Vec;
61use core::cmp::max;
62
63use miden_objects::account::AccountId;
64use miden_objects::block::BlockNumber;
65use miden_objects::note::{NoteId, NoteTag};
66use miden_objects::transaction::{PartialBlockchain, TransactionId};
67use miden_tx::auth::TransactionAuthenticator;
68use miden_tx::utils::{Deserializable, DeserializationError, Serializable};
69
70use crate::note::NoteScreener;
71use crate::store::{NoteFilter, TransactionFilter};
72use crate::{Client, ClientError};
73mod block_header;
74
75mod tag;
76pub use tag::{NoteTagRecord, NoteTagSource};
77
78mod state_sync;
79pub use state_sync::{NoteUpdateAction, OnNoteReceived, StateSync};
80
81mod state_sync_update;
82pub use state_sync_update::{
83    AccountUpdates,
84    BlockUpdates,
85    StateSyncUpdate,
86    TransactionUpdateTracker,
87};
88
89/// Client synchronization methods.
90impl<AUTH> Client<AUTH>
91where
92    AUTH: TransactionAuthenticator + Sync + 'static,
93{
94    // SYNC STATE
95    // --------------------------------------------------------------------------------------------
96
97    /// Returns the block number of the last state sync block.
98    pub async fn get_sync_height(&self) -> Result<BlockNumber, ClientError> {
99        self.store.get_sync_height().await.map_err(Into::into)
100    }
101
102    /// Syncs the client's state with the current state of the Miden network and returns a
103    /// [`SyncSummary`] corresponding to the local state update.
104    ///
105    /// The sync process is done in multiple steps:
106    /// 1. A request is sent to the node to get the state updates. This request includes tracked
107    ///    account IDs and the tags of notes that might have changed or that might be of interest to
108    ///    the client.
109    /// 2. A response is received with the current state of the network. The response includes
110    ///    information about new/committed/consumed notes, updated accounts, and committed
111    ///    transactions.
112    /// 3. Tracked notes are updated with their new states.
113    /// 4. New notes are checked, and only relevant ones are stored. Relevant notes are those that
114    ///    can be consumed by accounts the client is tracking (this is checked by the
115    ///    [`crate::note::NoteScreener`])
116    /// 5. Transactions are updated with their new states.
117    /// 6. Tracked public accounts are updated and private accounts are validated against the node
118    ///    state.
119    /// 7. The MMR is updated with the new peaks and authentication nodes.
120    /// 8. All updates are applied to the store to be persisted.
121    pub async fn sync_state(&mut self) -> Result<SyncSummary, ClientError> {
122        _ = self.ensure_genesis_in_place().await?;
123
124        let note_screener = NoteScreener::new(self.store.clone(), self.authenticator.clone());
125        let state_sync =
126            StateSync::new(self.rpc_api.clone(), Arc::new(note_screener), self.tx_graceful_blocks);
127
128        // Get current state of the client
129        let accounts = self
130            .store
131            .get_account_headers()
132            .await?
133            .into_iter()
134            .map(|(acc_header, _)| acc_header)
135            .collect();
136
137        let note_tags: BTreeSet<NoteTag> = self.store.get_unique_note_tags().await?;
138
139        let unspent_input_notes = self.store.get_input_notes(NoteFilter::Unspent).await?;
140        let unspent_output_notes = self.store.get_output_notes(NoteFilter::Unspent).await?;
141
142        let uncommitted_transactions =
143            self.store.get_transactions(TransactionFilter::Uncommitted).await?;
144
145        // Build current partial MMR
146        let current_partial_mmr = self.build_current_partial_mmr().await?;
147
148        let all_block_numbers = (0..current_partial_mmr.forest().num_leaves())
149            .filter_map(|block_num| {
150                current_partial_mmr.is_tracked(block_num).then_some(BlockNumber::from(
151                    u32::try_from(block_num).expect("block number should be less than u32::MAX"),
152                ))
153            })
154            .collect::<BTreeSet<_>>();
155
156        let block_headers = self
157            .store
158            .get_block_headers(&all_block_numbers)
159            .await?
160            .into_iter()
161            .map(|(header, _has_notes)| header);
162
163        // Get the sync update from the network
164        let state_sync_update = state_sync
165            .sync_state(
166                PartialBlockchain::new(current_partial_mmr, block_headers)?,
167                accounts,
168                note_tags,
169                unspent_input_notes,
170                unspent_output_notes,
171                uncommitted_transactions,
172            )
173            .await?;
174
175        let sync_summary: SyncSummary = (&state_sync_update).into();
176
177        // Apply received and computed updates to the store
178        self.store
179            .apply_state_sync(state_sync_update)
180            .await
181            .map_err(ClientError::StoreError)?;
182
183        // Remove irrelevant block headers
184        self.store.prune_irrelevant_blocks().await?;
185
186        Ok(sync_summary)
187    }
188}
189
190// SYNC SUMMARY
191// ================================================================================================
192
193/// Contains stats about the sync operation.
194#[derive(Debug, PartialEq)]
195pub struct SyncSummary {
196    /// Block number up to which the client has been synced.
197    pub block_num: BlockNumber,
198    /// IDs of new public notes that the client has received.
199    pub new_public_notes: Vec<NoteId>,
200    /// IDs of tracked notes that have been committed.
201    pub committed_notes: Vec<NoteId>,
202    /// IDs of notes that have been consumed.
203    pub consumed_notes: Vec<NoteId>,
204    /// IDs of on-chain accounts that have been updated.
205    pub updated_accounts: Vec<AccountId>,
206    /// IDs of private accounts that have been locked.
207    pub locked_accounts: Vec<AccountId>,
208    /// IDs of committed transactions.
209    pub committed_transactions: Vec<TransactionId>,
210}
211
212impl SyncSummary {
213    pub fn new(
214        block_num: BlockNumber,
215        new_public_notes: Vec<NoteId>,
216        committed_notes: Vec<NoteId>,
217        consumed_notes: Vec<NoteId>,
218        updated_accounts: Vec<AccountId>,
219        locked_accounts: Vec<AccountId>,
220        committed_transactions: Vec<TransactionId>,
221    ) -> Self {
222        Self {
223            block_num,
224            new_public_notes,
225            committed_notes,
226            consumed_notes,
227            updated_accounts,
228            locked_accounts,
229            committed_transactions,
230        }
231    }
232
233    pub fn new_empty(block_num: BlockNumber) -> Self {
234        Self {
235            block_num,
236            new_public_notes: vec![],
237            committed_notes: vec![],
238            consumed_notes: vec![],
239            updated_accounts: vec![],
240            locked_accounts: vec![],
241            committed_transactions: vec![],
242        }
243    }
244
245    pub fn is_empty(&self) -> bool {
246        self.new_public_notes.is_empty()
247            && self.committed_notes.is_empty()
248            && self.consumed_notes.is_empty()
249            && self.updated_accounts.is_empty()
250            && self.locked_accounts.is_empty()
251            && self.committed_transactions.is_empty()
252    }
253
254    pub fn combine_with(&mut self, mut other: Self) {
255        self.block_num = max(self.block_num, other.block_num);
256        self.new_public_notes.append(&mut other.new_public_notes);
257        self.committed_notes.append(&mut other.committed_notes);
258        self.consumed_notes.append(&mut other.consumed_notes);
259        self.updated_accounts.append(&mut other.updated_accounts);
260        self.locked_accounts.append(&mut other.locked_accounts);
261        self.committed_transactions.append(&mut other.committed_transactions);
262    }
263}
264
265impl Serializable for SyncSummary {
266    fn write_into<W: miden_tx::utils::ByteWriter>(&self, target: &mut W) {
267        self.block_num.write_into(target);
268        self.new_public_notes.write_into(target);
269        self.committed_notes.write_into(target);
270        self.consumed_notes.write_into(target);
271        self.updated_accounts.write_into(target);
272        self.locked_accounts.write_into(target);
273        self.committed_transactions.write_into(target);
274    }
275}
276
277impl Deserializable for SyncSummary {
278    fn read_from<R: miden_tx::utils::ByteReader>(
279        source: &mut R,
280    ) -> Result<Self, DeserializationError> {
281        let block_num = BlockNumber::read_from(source)?;
282        let new_public_notes = Vec::<NoteId>::read_from(source)?;
283        let committed_notes = Vec::<NoteId>::read_from(source)?;
284        let consumed_notes = Vec::<NoteId>::read_from(source)?;
285        let updated_accounts = Vec::<AccountId>::read_from(source)?;
286        let locked_accounts = Vec::<AccountId>::read_from(source)?;
287        let committed_transactions = Vec::<TransactionId>::read_from(source)?;
288
289        Ok(Self {
290            block_num,
291            new_public_notes,
292            committed_notes,
293            consumed_notes,
294            updated_accounts,
295            locked_accounts,
296            committed_transactions,
297        })
298    }
299}
miden_client/sync/mod.rs

miden_client/sync/
mod.rs
