Canonical indexes and recoverable market observation

server/testnet/canonical-index.ts

@@ -0,0 +1,186 @@
+import type { DatabaseSync } from 'node:sqlite';
+import { randomUUID } from 'node:crypto';
+import { isNftTrade, transactionCardIds, type NftState, type TestnetBlock } from '../../shared/testnet.ts';
+import { GENESIS_HASH, sha256, transactionId } from './consensus.ts';
+import { RpcError } from '../resources.ts';
+
+export type CanonicalEvent = { sequence: number; type: 'connect' | 'disconnect';
+  height: number; hash: string; previousHash: string; transactionIds: string[]; eventHash: string };
+export type CanonicalEvents = { streamId: string; previousAnchor: string; anchor: string;
+  events: CanonicalEvent[]; cursor: number; head: number; caughtUp: boolean };
+type NftRow = { token: string; owner: string; sequence: number; minted_height: number; block_hash: string };
+export type IndexedNft = { block: TestnetBlock; owner: string; sequence: number; confirmations: number };
+
+/** Local derived indexes, NOT consensus. Writes share the ledger's block/pending transaction. */
+export class CanonicalIndex {
+  private readonly db: DatabaseSync;
+  private streamId = '';
+  constructor(db: DatabaseSync) { this.db = db; }
+
+  initialize(chain: TestnetBlock[], state: NftState): void {
+    this.db.exec('BEGIN IMMEDIATE');
+    try {
+      this.db.exec(`CREATE TABLE IF NOT EXISTS canonical_meta(key TEXT PRIMARY KEY,value TEXT NOT NULL);
+        CREATE TABLE IF NOT EXISTS canonical_blocks(height INTEGER PRIMARY KEY,hash TEXT NOT NULL UNIQUE REFERENCES blocks(hash));
+        CREATE TABLE IF NOT EXISTS canonical_nfts(token TEXT PRIMARY KEY,owner TEXT NOT NULL,sequence INTEGER NOT NULL,
+          minted_height INTEGER NOT NULL,block_hash TEXT NOT NULL REFERENCES blocks(hash));
+        CREATE INDEX IF NOT EXISTS canonical_owner ON canonical_nfts(owner,minted_height,token);
+        CREATE TABLE IF NOT EXISTS canonical_transactions(id TEXT PRIMARY KEY,height INTEGER NOT NULL,block_hash TEXT NOT NULL);
+        CREATE INDEX IF NOT EXISTS canonical_tx_height ON canonical_transactions(height);
+        CREATE TABLE IF NOT EXISTS canonical_undo(height INTEGER PRIMARY KEY,data TEXT NOT NULL);
+        CREATE TABLE IF NOT EXISTS canonical_events(sequence INTEGER PRIMARY KEY AUTOINCREMENT,type TEXT NOT NULL,
+          height INTEGER NOT NULL,hash TEXT NOT NULL,previous_hash TEXT NOT NULL,transactions_json TEXT NOT NULL,
+          previous_event_hash TEXT NOT NULL,event_hash TEXT NOT NULL);
+        CREATE TRIGGER IF NOT EXISTS canonical_events_no_update BEFORE UPDATE ON canonical_events
+          BEGIN SELECT RAISE(ABORT,'Immutable canonical event'); END;
+        CREATE TRIGGER IF NOT EXISTS canonical_events_no_delete BEFORE DELETE ON canonical_events
+          BEGIN SELECT RAISE(ABORT,'Immutable canonical event'); END;`);
+      const version = this.db.prepare("SELECT value FROM canonical_meta WHERE key='version'").get() as { value: string } | undefined;
+      if (!version) {
+        // Additive backfill only after Ledger.open has independently validated all persisted proofs/state.
+        const count = this.db.prepare('SELECT COUNT(*) AS n FROM canonical_events').get() as { n: number };
+        if (count.n || (this.db.prepare('SELECT COUNT(*) AS n FROM canonical_blocks').get() as { n: number }).n) {
+          throw new Error('Partial canonical index; offline operator review required');
+        }
+        this.streamId = randomUUID();
+        this.db.prepare('INSERT INTO canonical_meta VALUES(?,?)').run('stream_id', this.streamId);
+        for (const block of chain) this.connect(block);
+        this.db.prepare('INSERT INTO canonical_meta VALUES(?,?)').run('version', '1');
+      } else if (version.value !== '1') throw new Error('Canonical index version mismatch');
+      else {
+        const row = this.db.prepare("SELECT value FROM canonical_meta WHERE key='stream_id'").get() as { value: string } | undefined;
+        if (!row || !/^[a-f0-9]{8}(-[a-f0-9]{4}){3}-[a-f0-9]{12}$/.test(row.value)) throw new Error('Canonical stream identity missing');
+        this.streamId = row.value;
+      }
+      this.verify(chain, state);
+      this.db.exec('COMMIT');
+    } catch (error) { this.db.exec('ROLLBACK'); throw error; }
+  }
+  private verify(chain: TestnetBlock[], state: NftState): void {
+    const blocks = this.db.prepare('SELECT height,hash FROM canonical_blocks ORDER BY height').all() as { height: number; hash: string }[];
+    if (blocks.length !== chain.length || blocks.some((b, i) => b.height !== chain[i].height || b.hash !== chain[i].hash)) {
+      throw new Error('Canonical block index mismatch');
+    }
+    const nfts = this.db.prepare('SELECT * FROM canonical_nfts').all() as NftRow[];
+    const expected = new Map(chain.map(b => [b.tokenId, b]));
+    if (nfts.length !== expected.size) throw new Error('Canonical NFT index mismatch');
+    for (const row of nfts) {
+      const nft = state[row.token], block = expected.get(row.token);
+      if (!nft || !block || row.owner !== nft.owner || row.sequence !== nft.sequence ||
+        row.minted_height !== block.height || row.block_hash !== block.hash) throw new Error('Canonical ownership index mismatch');
+    }
+    const transactions = this.db.prepare('SELECT id,height,block_hash FROM canonical_transactions').all() as { id: string; height: number; block_hash: string }[];
+    const expectedTxs = new Map(chain.flatMap(b => b.transactions.map(tx => [transactionId(tx), b] as const)));
+    if (transactions.length !== expectedTxs.size || transactions.some(row => {
+      const block = expectedTxs.get(row.id); return !block || row.height !== block.height || row.block_hash !== block.hash;
+    })) throw new Error('Canonical transaction index mismatch');
+    const undo = this.db.prepare('SELECT COUNT(*) AS n FROM canonical_undo').get() as { n: number };
+    if (undo.n !== chain.length) throw new Error('Canonical undo index mismatch');
+    // A cursor is only useful if history has no gaps and describes the same validated DAG transitions.
+    const stack: string[] = [];
+    let sequence = 0, anchor = GENESIS_HASH;
+    for (const raw of this.db.prepare(`SELECT e.*,b.block_json FROM canonical_events e
+      LEFT JOIN blocks b ON b.hash=e.hash ORDER BY e.sequence`).iterate() as Iterable<{
+        sequence: number; type: string; height: number; hash: string; previous_hash: string;
+        transactions_json: string; block_json: string | null; previous_event_hash: string; event_hash: string }>) {
+      const block = raw.block_json ? JSON.parse(raw.block_json) as TestnetBlock : undefined;
+      if (raw.sequence !== ++sequence || !block || block.height !== raw.height || block.previousHash !== raw.previous_hash ||
+        raw.transactions_json !== JSON.stringify(block.transactions.map(transactionId))) throw new Error('Canonical event integrity mismatch');
+      if (raw.previous_event_hash !== anchor || raw.event_hash !== this.eventHash(raw.sequence, raw.type,
+        block, anchor)) throw new Error('Canonical event anchor mismatch');
+      anchor = raw.event_hash;
+      if (raw.type === 'connect') {
+        if (raw.height !== stack.length + 1 || raw.previous_hash !== (stack.at(-1) ?? GENESIS_HASH)) throw new Error('Canonical event connect mismatch');
+        stack.push(raw.hash);
+      } else if (raw.type === 'disconnect') {
+        if (raw.height !== stack.length || stack.pop() !== raw.hash) throw new Error('Canonical event disconnect mismatch');
+      } else throw new Error('Unknown canonical event');
+    }
+    if (stack.length !== chain.length || stack.some((hash, i) => hash !== chain[i].hash)) throw new Error('Canonical event tip mismatch');
+  }
+  private event(type: CanonicalEvent['type'], block: TestnetBlock) {
+    const prior = this.db.prepare('SELECT sequence,event_hash FROM canonical_events ORDER BY sequence DESC LIMIT 1').get() as
+      { sequence: number; event_hash: string } | undefined;
+    const sequence = (prior?.sequence ?? 0) + 1, anchor = prior?.event_hash ?? GENESIS_HASH;
+    this.db.prepare('INSERT INTO canonical_events(sequence,type,height,hash,previous_hash,transactions_json,previous_event_hash,event_hash) VALUES(?,?,?,?,?,?,?,?)')
+      .run(sequence, type, block.height, block.hash, block.previousHash, JSON.stringify(block.transactions.map(transactionId)),
+        anchor, this.eventHash(sequence, type, block, anchor));
+  }
+  private eventHash(sequence: number, type: string, block: TestnetBlock, previousAnchor: string): string {
+    return sha256(JSON.stringify(['wikideck-canonical-event-v1', this.streamId, sequence, type,
+      block.height, block.hash, block.previousHash, block.transactions.map(transactionId), previousAnchor]));
+  }
+  connect(block: TestnetBlock): void {
+    const tokens = new Set([block.tokenId, ...block.transactions.flatMap(transactionCardIds)]);
+    const undo = [...tokens].map(token => [token, this.db.prepare('SELECT * FROM canonical_nfts WHERE token=?').get(token) ?? null]);
+    this.db.prepare('INSERT INTO canonical_undo VALUES(?,?)').run(block.height, JSON.stringify(undo));
+    this.db.prepare('INSERT INTO canonical_blocks VALUES(?,?)').run(block.height, block.hash);
+    this.db.prepare('INSERT INTO canonical_nfts VALUES(?,?,?,?,?)').run(block.tokenId, block.owner, 0, block.height, block.hash);
+    const update = this.db.prepare('UPDATE canonical_nfts SET owner=?,sequence=sequence+1 WHERE token=?');
+    for (const tx of block.transactions) {
+      if (isNftTrade(tx)) {
+        for (const leg of tx.offered) update.run(tx.counterparty, leg.cardHash);
+        for (const leg of tx.requested) update.run(tx.proposer, leg.cardHash);
+      } else update.run(tx.to, tx.cardHash);
+      this.db.prepare('INSERT INTO canonical_transactions VALUES(?,?,?)').run(transactionId(tx), block.height, block.hash);
+    }
+    this.event('connect', block);
+  }
+  disconnect(block: TestnetBlock): void {
+    const row = this.db.prepare('SELECT data FROM canonical_undo WHERE height=?').get(block.height) as { data: string } | undefined;
+    if (!row) throw new Error('Missing canonical undo record');
+    for (const [token, prior] of JSON.parse(row.data) as [string, NftRow | null][]) {
+      this.db.prepare('DELETE FROM canonical_nfts WHERE token=?').run(token);
+      if (prior) this.db.prepare('INSERT INTO canonical_nfts VALUES(?,?,?,?,?)')
+        .run(prior.token, prior.owner, prior.sequence, prior.minted_height, prior.block_hash);
+    }
+    this.db.prepare('DELETE FROM canonical_transactions WHERE height=?').run(block.height);
+    this.db.prepare('DELETE FROM canonical_blocks WHERE height=?').run(block.height);
+    this.db.prepare('DELETE FROM canonical_undo WHERE height=?').run(block.height);
+    this.event('disconnect', block);
+  }
+  head(): number {
+    return (this.db.prepare('SELECT COALESCE(MAX(sequence),0) AS n FROM canonical_events').get() as { n: number }).n;
+  }
+  events(after: number, limit = 64): CanonicalEvents {
+    const head = this.head();
+    if (!Number.isSafeInteger(after) || after < 0 || after > head || !Number.isSafeInteger(limit) || limit < 1 || limit > 64) {
+      throw new RpcError(409, 'Invalid canonical event cursor; restore/reconcile local consumer state.');
+    }
+    const rows = this.db.prepare('SELECT * FROM canonical_events WHERE sequence>? ORDER BY sequence LIMIT ?').all(after, limit) as
+      { sequence: number; type: CanonicalEvent['type']; height: number; hash: string; previous_hash: string;
+        transactions_json: string; event_hash: string }[];
+    if (rows.some((r, i) => r.sequence !== after + i + 1)) throw new Error('Canonical event history gap');
+    const events = rows.map(r => ({ sequence: r.sequence, type: r.type, height: r.height, hash: r.hash,
+      previousHash: r.previous_hash, transactionIds: JSON.parse(r.transactions_json) as string[], eventHash: r.event_hash }));
+    const cursor = events.at(-1)?.sequence ?? after;
+    if (cursor < head && !events.length) throw new Error('Missing canonical event history');
+    const previousAnchor = after === 0 ? GENESIS_HASH : (this.db.prepare('SELECT event_hash FROM canonical_events WHERE sequence=?').get(after) as { event_hash: string } | undefined)?.event_hash;
+    if (!previousAnchor) throw new Error('Missing canonical cursor anchor');
+    return { streamId: this.streamId, previousAnchor, anchor: events.at(-1)?.eventHash ?? previousAnchor,
+      events, cursor, head, caughtUp: cursor === head };
+  }
+  nft(token: string, height: number): IndexedNft | undefined {
+    const row = this.db.prepare(`SELECT n.owner,n.sequence,n.minted_height,b.block_json FROM canonical_nfts n
+      JOIN blocks b ON b.hash=n.block_hash WHERE n.token=?`).get(token) as
+      { owner: string; sequence: number; minted_height: number; block_json: string } | undefined;
+    return row ? { block: JSON.parse(row.block_json), owner: row.owner, sequence: row.sequence,
+      confirmations: height - row.minted_height + 1 } : undefined;
+  }
+  transaction(id: string): { height: number; blockHash: string } | undefined {
+    const row = this.db.prepare('SELECT height,block_hash FROM canonical_transactions WHERE id=?').get(id) as
+      { height: number; block_hash: string } | undefined;
+    return row ? { height: row.height, blockHash: row.block_hash } : undefined;
+  }
+  deck(owner: string, offset: number, limit: number, height: number) {
+    const total = (this.db.prepare('SELECT COUNT(*) AS n FROM canonical_nfts WHERE owner=?').get(owner) as { n: number }).n;
+    const rows = this.db.prepare(`SELECT n.owner,n.sequence,n.minted_height,b.block_json FROM canonical_nfts n
+      JOIN blocks b ON b.hash=n.block_hash WHERE n.owner=? ORDER BY n.minted_height,n.token LIMIT ? OFFSET ?`)
+      .all(owner, limit, offset) as { owner: string; sequence: number; minted_height: number; block_json: string }[];
+    return { total, nfts: rows.map(r => ({ block: JSON.parse(r.block_json) as TestnetBlock,
+      sequence: r.sequence, confirmations: height - r.minted_height + 1 })) };
+  }
+  tip(): string {
+    return (this.db.prepare('SELECT hash FROM canonical_blocks ORDER BY height DESC LIMIT 1').get() as { hash: string } | undefined)?.hash ?? GENESIS_HASH;
+  }
+}

server/testnet/http.ts

@@ -6,7 +6,7 @@ import { fileURLToPath } from 'node:url';
 import { mkdir, open, unlink } from 'node:fs/promises';
 import { z } from 'zod';
 import { NETWORK, CONSENSUS } from '../../shared/testnet.ts';
-import { testnetOwnerOf, transactionCardIds } from '../../shared/testnet.ts';
+import { transactionCardIds } from '../../shared/testnet.ts';
 import { CHAIN_ID, blockSchema, tradeSchema, transferSchema, transactionSchema } from './consensus.ts';
 import { RandomX } from './randomx.ts';
 import { Ledger } from './ledger.ts';
@@ -56,11 +56,10 @@ let custody: CustodyMarket | undefined;
 try {
   if (custodyConfig === 'sandbox') custody = await CustodyMarket.open(dataDir, { feeBps: paymentConfig.feeBps,
     card: (hash, owner, sequence) => {
-      const s = ledger.snapshot(), b = s.blocks.find(block => block.tokenId === hash);
-      if (!b || testnetOwnerOf(s, hash) !== owner || s.blocks.length + 1 - b.height < CONSENSUS.coinbaseMaturity ||
-        s.transfers.filter(tx => transactionCardIds(tx).includes(hash)).length !== sequence ||
-        s.pendingTransfers.some(tx => transactionCardIds(tx).includes(hash))) return undefined;
-      return { title: b.article.title };
+      const nft = ledger.nft(hash);
+      if (!nft || nft.owner !== owner || nft.confirmations < CONSENSUS.coinbaseMaturity || nft.sequence !== sequence ||
+        ledger.pendingTransactions().some(tx => transactionCardIds(tx).includes(hash))) return undefined;
+      return { title: nft.block.article.title };
     } });
 } catch(e) {market.close();peers.close();ledger.close();engine.close();await lock.close();await unlink(lockPath);throw e;}
 const app = express();
@@ -138,6 +137,9 @@ app.get('/api/decks/:address', rateLimit({windowMs:60000,limit:60,standardHeader
     res.status(400).json({error:'Invalid deck page'});return;
   }
   res.setHeader('Cache-Control','no-store');
+  if(req.query.tip!==undefined && req.query.tip!==ledger.summary().tip){
+    res.status(409).json({error:'Canonical tip changed; restart deck pagination.'});return;
+  }
   res.json(ledger.deck(req.params.address,offset,limit));
 });
 // Optional live data is intentionally not used by genesis, block validation or NFT ownership.
@@ -156,13 +158,15 @@ app.get('/p2p/blocks',(req,res)=>{
 });
 app.get('/p2p/mempool',(_req,res)=>res.json({transactions:ledger.pendingTransactions()}));
 app.get('/api/nfts/:id', (req,res)=>{
-  const s=ledger.snapshot();const block=s.blocks.find(b=>b.tokenId===req.params.id);
-  if(!block){res.status(404).json({error:'NFT not found on the canonical chain'});return;}
-  const owner=testnetOwnerOf(s,block.tokenId)??block.owner;
-  const sequence=s.transfers.filter(tx=>transactionCardIds(tx).includes(block.tokenId)).length;
-  res.json({network:NETWORK,chainId:CHAIN_ID,tokenId:block.tokenId,owner,sequence,blockHash:block.hash,
-    confirmations:s.blocks.length-block.height+1,article:block.article,statsSnapshot:block.statsSnapshot,
-    stateRoot:s.blocks.at(-1)?.stateRoot});
+  if(typeof req.params.id!=='string'||!/^[a-f0-9]{64}$/.test(req.params.id)){
+    res.status(400).json({error:'Invalid NFT identifier'});return;
+  }
+  const nft=ledger.nft(req.params.id);
+  if(!nft){res.status(404).json({error:'NFT not found on the canonical chain'});return;}
+  const block=nft.block;
+  res.json({network:NETWORK,chainId:CHAIN_ID,tokenId:block.tokenId,owner:nft.owner,sequence:nft.sequence,blockHash:block.hash,
+    confirmations:nft.confirmations,article:block.article,statsSnapshot:block.statsSnapshot,
+    stateRoot:ledger.block(ledger.summary().tip)?.stateRoot});
 });
 const templateLimit=rateLimit({windowMs:60000,limit:20,standardHeaders:'draft-8',legacyHeaders:false});
 app.post('/api/mining/template', templateLimit, async (req,res)=>{

server/testnet/ledger.ts

@@ -13,6 +13,7 @@ import type { Article } from '../../shared/protocol.ts';
 import type { MintStatsSnapshot } from '../../shared/enrichment.ts';
 import { PROFILE } from '../../shared/network.ts';
 import { RpcError } from '../resources.ts';
+import { CanonicalIndex } from './canonical-index.ts';
 
 const MAX_PENDING = 256;
 const MAX_DECK_PAGE = 24;
@@ -39,11 +40,14 @@ export class Ledger {
   private readonly file: string;
   private readonly db: DatabaseSync;
   private readonly pow: PowEngine;
+  private readonly index: CanonicalIndex;
   private closed = false;
   private revision = 0;
   private reorgs = 0;
   private canonicalCache: { tip: string; blocks: TestnetBlock[] } | undefined;
-  private constructor(file: string, db: DatabaseSync, pow: PowEngine) { this.file = file; this.db = db; this.pow = pow; }
+  private constructor(file: string, db: DatabaseSync, pow: PowEngine) {
+    this.file = file; this.db = db; this.pow = pow; this.index = new CanonicalIndex(db);
+  }
 
   static async open(dir: string, pow: PowEngine): Promise<Ledger> {
     const directory = join(dir, PROFILE);
@@ -141,6 +145,7 @@ export class Ledger {
         ledger.pending.push(tx);
       }
       ledger.pendingState = state;
+      ledger.index.initialize(ledger.canonical(), materializeState(ledger.tipState()));
       return ledger;
     } catch (error) {
       db.close();
@@ -192,7 +197,9 @@ export class Ledger {
         [...disconnected.flatMap(b => b.transactions), ...this.pending]) : undefined;
       const pending = filtered?.pending ?? this.pending;
       // Nothing visible changes until the atomic replacement succeeds.
-      await this.persist(node.block, pending);
+      const oldHashes = new Set(oldChain.map(b => b.hash));
+      const connected = wins ? chain.filter(b => !oldHashes.has(b.hash)) : [];
+      this.persist(node.block, pending, disconnected, connected);
       this.nodes.set(node.block.hash, node);
       if (wins) this.tip = node.block.hash;
       if (disconnected.length) this.reorgs++;
@@ -217,7 +224,7 @@ export class Ledger {
       if (this.pending.length >= MAX_PENDING) throw new Error('Testnet mempool limit: 256 transfers');
       const nextPendingState = applyTransactionOverlay(this.pendingState, tx, this.height() + 1);
       const pending = [...this.pending, tx];
-      await this.persist(undefined, pending);
+      this.persist(undefined, pending);
       this.pending = pending;
       this.pendingState = nextPendingState;
       this.revision++;
@@ -246,6 +253,10 @@ export class Ledger {
   }
   peerStatus() { return { network: NETWORK, chainId: CHAIN_ID, size: this.size, tip: this.tip }; }
   pendingTransactions(): TestnetTransaction[] { return structuredClone(this.pending); }
+  canonicalEvents(after: number, limit = 64) { return this.index.events(after, limit); }
+  canonicalHead(): number { return this.index.head(); }
+  nft(token: string) { return this.index.nft(token, this.height()); }
+  canonicalTransaction(id: string) { return this.index.transaction(id); }
   legacySnapshot(maxBlocks: number): TestnetSnapshot {
     // Reject before any full-chain copy/serialization. Never truncate ownership history silently.
     if (this.height() > maxBlocks) throw new RpcError(413, 'Full snapshot disabled at this height; use /api/summary and /api/canonical pages.');
@@ -263,18 +274,10 @@ export class Ledger {
     if (!Number.isSafeInteger(offset) || offset < 0 || !Number.isSafeInteger(limit) || limit < 1 || limit > MAX_DECK_PAGE) {
       throw new Error('Invalid deck page');
     }
-    const blocks = this.canonical();
-    const byToken = new Map(blocks.map(block => [block.tokenId, block]));
-    const state = materializeState(this.tipState());
-    const owned = Object.entries(state).filter(([, nft]) => nft.owner === address)
-      .flatMap(([tokenId, nft]) => {
-          const block = byToken.get(tokenId);
-          return block ? [{ block, sequence: nft.sequence, confirmations: blocks.length - block.height + 1 }] : [];
-        }).sort((a, b) => a.block.height - b.block.height || a.block.tokenId.localeCompare(b.block.tokenId));
-    const nfts = owned.slice(offset, offset + limit);
-    const next = offset + nfts.length < owned.length ? offset + nfts.length : null;
+    const { total, nfts } = this.index.deck(address, offset, limit, this.height());
+    const next = offset + nfts.length < total ? offset + nfts.length : null;
     return structuredClone({ network: NETWORK, chainId: CHAIN_ID, address, tip: this.tip,
-      offset, limit, total: owned.length, next, nfts });
+      offset, limit, total, next, nfts });
   }
 
   private height(): number { return this.nodes.get(this.tip)?.block.height ?? 0; }
@@ -322,7 +325,8 @@ export class Ledger {
     this.queue = result.catch(() => undefined).finally(() => { this.queued--; });
     return result;
   }
-  private async persist(block: TestnetBlock | undefined, pendingTransfers: TestnetTransaction[]): Promise<void> {
+  private persist(block: TestnetBlock | undefined, pendingTransfers: TestnetTransaction[],
+    disconnected: TestnetBlock[] = [], connected: TestnetBlock[] = []): void {
     this.db.exec('BEGIN IMMEDIATE');
     try {
       if (block) this.db.prepare('INSERT INTO blocks(hash, previous_hash, block_json) VALUES(?, ?, ?)')
@@ -330,6 +334,8 @@ export class Ledger {
       this.db.exec('DELETE FROM pending_transfers');
       const insertPending = this.db.prepare('INSERT INTO pending_transfers(position, id, transaction_json) VALUES(?, ?, ?)');
       pendingTransfers.forEach((tx, index) => insertPending.run(index, transactionId(tx), JSON.stringify(tx)));
+      for (const old of [...disconnected].reverse()) this.index.disconnect(old);
+      for (const next of connected) this.index.connect(next);
       this.db.exec('COMMIT');
     } catch (error) {
       this.db.exec('ROLLBACK');