feat(sds): add message channel with buffers and send/receive logic

.cspell.json

@@ -64,6 +64,7 @@
     "kdfparams",
     "keccak",
     "keypair",
+    "lamport",
     "lastpub",
     "libauth",
     "libp",

packages/proto/src/index.ts

@@ -15,3 +15,5 @@ export * as proto_store from './generated/store_v3.js'
 export * as proto_peer_exchange from "./generated/peer_exchange.js";
 
 export * as proto_metadata from './generated/metadata.js'
+
+export * as proto_sds_message from './generated/sds_message.js'

packages/sds/.mocharc.cjs

@@ -8,7 +8,7 @@ const config = {
     'loader=ts-node/esm'
   ],
   exit: true,
-  retries: 4
+  retries: 2
 };
 
 if (process.env.CI) {

packages/sds/package.json

@@ -59,6 +59,10 @@
         "node": ">=20"
     },
     "dependencies": {
+        "@noble/hashes": "^1.7.1",
+        "@waku/message-hash": "^0.1.17",
+        "@waku/proto": "^0.0.8",
+        "@waku/utils": "^0.0.21",
         "chai": "^5.1.2"
     },
     "devDependencies": {

packages/sds/src/bloom.spec.ts

@@ -1,7 +1,6 @@
 import { expect } from "chai";
 
-import { BloomFilter } from "./bloom.js";
-import { hashN } from "./nim_hashn/nim_hashn.mjs";
+import { BloomFilter, DefaultBloomFilter } from "./bloom.js";
 
 const n = 10000;
 const sampleChars =
@@ -20,13 +19,10 @@ describe("BloomFilter", () => {
   let testElements: string[];
 
   beforeEach(() => {
-    bloomFilter = new BloomFilter(
-      {
-        capacity: n,
-        errorRate: 0.001
-      },
-      hashN
-    );
+    bloomFilter = new DefaultBloomFilter({
+      capacity: n,
+      errorRate: 0.001
+    });
 
     testElements = new Array<string>(n);
 
@@ -55,15 +51,12 @@ describe("BloomFilter", () => {
     expect(bloomFilter.kHashes).to.equal(10);
     expect(bloomFilter.totalBits / n).to.equal(15);
 
-    const bloomFilter2 = new BloomFilter(
-      {
-        capacity: 10000,
-        errorRate: 0.001,
-        kHashes: 4,
-        forceNBitsPerElem: 20
-      },
-      hashN
-    );
+    const bloomFilter2 = new DefaultBloomFilter({
+      capacity: 10000,
+      errorRate: 0.001,
+      kHashes: 4,
+      forceNBitsPerElem: 20
+    });
     expect(bloomFilter2.kHashes).to.equal(4);
     expect(bloomFilter2.totalBits).to.equal(200000);
   });
@@ -107,20 +100,28 @@ describe("BloomFilter", () => {
       expect(bloomFilter.lookup(item)).to.equal(true);
     }
   });
+
+  it("should serialize and deserialize correctly", () => {
+    const serialized = bloomFilter.toBytes();
+    const deserialized = DefaultBloomFilter.fromBytes(
+      serialized,
+      bloomFilter.options
+    );
+    for (const item of testElements) {
+      expect(deserialized.lookup(item)).to.equal(true);
+    }
+  });
 });
 
 describe("BloomFilter with special patterns", () => {
   let bloomFilter: BloomFilter;
   const inserted: string[] = [];
 
   beforeEach(() => {
-    bloomFilter = new BloomFilter(
-      {
-        capacity: n,
-        errorRate: 0.001
-      },
-      hashN
-    );
+    bloomFilter = new DefaultBloomFilter({
+      capacity: n,
+      errorRate: 0.001
+    });
   });
 
   it("should handle special patterns correctly", () => {

packages/sds/src/bloom.ts

@@ -1,3 +1,4 @@
+import { hashN } from "./nim_hashn/nim_hashn.mjs";
 import { getMOverNBitsForK } from "./probabilities.js";
 
 export interface BloomFilterOptions {
@@ -30,11 +31,15 @@ export class BloomFilter {
   public kHashes: number;
   public errorRate: number;
 
+  public options: BloomFilterOptions;
+
   private hashN: (item: string, n: number, maxValue: number) => number;
   public constructor(
     options: BloomFilterOptions,
     hashN: (item: string, n: number, maxValue: number) => number
   ) {
+    this.options = options;
+
     let nBitsPerElem: number;
     let k = options.kHashes ?? 0;
     const forceNBitsPerElem = options.forceNBitsPerElem ?? 0;
@@ -103,4 +108,39 @@ export class BloomFilter {
     }
     return true;
   }
+
+  public toBytes(): Uint8Array {
+    const buffer = new ArrayBuffer(this.data.length * 8);
+    const view = new DataView(buffer);
+    for (let i = 0; i < this.data.length; i++) {
+      view.setBigInt64(i * 8, this.data[i]);
+    }
+    return new Uint8Array(buffer);
+  }
+
+  public static fromBytes(
+    bytes: Uint8Array,
+    options: BloomFilterOptions,
+    hashN: (item: string, n: number, maxValue: number) => number
+  ): BloomFilter {
+    const bloomFilter = new BloomFilter(options, hashN);
+    const view = new DataView(bytes.buffer);
+    for (let i = 0; i < bloomFilter.data.length; i++) {
+      bloomFilter.data[i] = view.getBigUint64(i * 8, false);
+    }
+    return bloomFilter;
+  }
+}
+
+export class DefaultBloomFilter extends BloomFilter {
+  public constructor(options: BloomFilterOptions) {
+    super(options, hashN);
+  }
+
+  public static fromBytes(
+    bytes: Uint8Array,
+    options: BloomFilterOptions
+  ): DefaultBloomFilter {
+    return BloomFilter.fromBytes(bytes, options, hashN);
+  }
 }