adds typings for the 'bloom-filter' package (#28838)

types/bloom-filter/bloom-filter-tests.ts

@@ -0,0 +1,28 @@
+import BloomFilter = require('bloom-filter');
+
+const numElements = 3;
+const falsePositiveRate = 0.01;
+const filter = BloomFilter.create(numElements, falsePositiveRate);
+
+// elements
+const a = Buffer.from('99108ad8ed9bb6274d3980bab5a85c048f0950c8', 'hex');
+const c = Buffer.from('b5a2c786d9ef4658287ced5914b37a1b4aa32eee', 'hex');
+
+// insert elements
+// $ExpectType void
+filter.insert(a);
+
+// $ExpectType boolean
+!filter.contains(c);
+
+// reinstantiate from an object
+const serialized = filter.toObject();
+const woahFilter = new BloomFilter(serialized);
+
+// initialize directly
+const newFilter = new BloomFilter({
+  vData: Buffer.from('123', 'hex'), // the data of the filter
+  nHashFuncs: 3, // the number of hash functions to use
+  nTweak: 2147483649, // the seed used for the hash fuctions
+  nFlags: 0 // flags used to update the filter when matched
+});

types/bloom-filter/index.d.ts

@@ -0,0 +1,38 @@
+// Type definitions for bloom-filter 0.2
+// Project: https://github.com/bitpay/bloom-filter
+// Definitions by: Daniel Byrne <https://github.com/danwbyrne>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/// <reference types="node" />
+
+declare class Filter {
+  constructor(options: Filter.FilterOptions);
+  static create(elements: number, falsePositiveRate: number, nTweak?: number, nFlags?: number): Filter;
+  toObject(): Filter.FilterOptions;
+  hash(nHashNum: number, vDataToHash: Buffer): number;
+  insert(data: Buffer): void;
+  contains(data: Buffer): boolean;
+  clear(): void;
+  inspect(): string;
+  BLOOM_UPDATE_NONE: number;
+  BLOOM_UPDATE_ALL: number;
+  BLOOM_UPDATE_P2PUBKEY_ONLY: number;
+  MAX_BLOOM_FILTER_SIZE: number;
+  MAX_HASH_FUNCS: number;
+  MIN_HASH_FUNCS: number;
+  LN2SQUARED: number;
+  LN2: number;
+}
+
+declare namespace Filter {
+  interface FilterOptions {
+    vData: Buffer;
+    nHashFuncs: number;
+    nTweak?: number;
+    nFlags?: number;
+  }
+
+  function MurmurHash3(seed: number, data: Buffer): number;
+}
+
+export = Filter;

types/bloom-filter/tsconfig.json

@@ -0,0 +1,19 @@
+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "lib": ["es6"],
+    "noImplicitAny": true,
+    "noImplicitThis": true,
+    "strictNullChecks": true,
+    "strictFunctionTypes": true,
+    "baseUrl": "../",
+    "typeRoots": ["../"],
+    "types": [],
+    "noEmit": true,
+    "forceConsistentCasingInFileNames": true
+  },
+  "files": [
+		"index.d.ts",
+		"bloom-filter-tests.ts"
+	]
+}

types/bloom-filter/tslint.json

@@ -0,0 +1,3 @@
+{
+  "extends": "dtslint/dt.json"
+}