Rename, relax validation, convert to arraybuf instead of hex

Author: contractormario

src/core/format/KeyGenerator.ts

@@ -23,14 +23,12 @@ export class KeyGenerator {
      * @param {string} input Input string
      * @returns {UInt64} Deterministic uint64 value for the given string
      */
-    public static fromString(input: string): UInt64 {
+    public static generateUInt64Key(input: string): UInt64 {
         if (input.length === 0) {
             throw Error(`Input must not be empty`);
         }
-        if (input.length > 1024) {
-            throw Error(`Input exceeds 1024 characters (has ${input.length})`);
-        }
-        const hex = sha3_256(input)
-        return UInt64.fromHex(hex.substr(0, 16))
+        const buf = sha3_256.arrayBuffer(input);
+        const result = new Uint32Array(buf);
+        return new UInt64([result[0], (result[1] | 0x80000000) >>> 0]);
     }
 }

test/core/format/KeyGenerator.spec.ts

@@ -20,20 +20,20 @@ import { KeyGenerator } from '../../../src/core/format/KeyGenerator';
 describe('key generator', () => {
     describe('generate key from string', () => {
         it('throws if input is empty', () => {
-            expect(() => KeyGenerator.fromString('')).to.throw(Error, 'Input must not be empty');
+            expect(() => KeyGenerator.generateUInt64Key('')).to.throw(Error, 'Input must not be empty');
         })
         it('returns UInt64', () => {
-            expect(KeyGenerator.fromString('a')).to.be.instanceOf(UInt64);
+            expect(KeyGenerator.generateUInt64Key('a')).to.be.instanceOf(UInt64);
         })
         it('generates correct keys', () => {
-            expect(KeyGenerator.fromString('a').toHex()).to.equal('80084BF2FBA02475');
+            expect(KeyGenerator.generateUInt64Key('a').toHex()).to.equal('F524A0FBF24B0880');
         })
         it('generates keys deterministically', () => {
-            expect(KeyGenerator.fromString('abc').toHex()).to.equal('3A985DA74FE225B2');
-            expect(KeyGenerator.fromString('abc').toHex()).to.equal('3A985DA74FE225B2');
-            expect(KeyGenerator.fromString('def').toHex()).to.equal('8E0D8F672252ACB0');
-            expect(KeyGenerator.fromString('def').toHex()).to.equal('8E0D8F672252ACB0');
-            expect(KeyGenerator.fromString('abc').toHex()).to.equal('3A985DA74FE225B2');
+            expect(KeyGenerator.generateUInt64Key('abc').toHex()).to.equal('B225E24FA75D983A');
+            expect(KeyGenerator.generateUInt64Key('abc').toHex()).to.equal('B225E24FA75D983A');
+            expect(KeyGenerator.generateUInt64Key('def').toHex()).to.equal('B0AC5222678F0D8E');
+            expect(KeyGenerator.generateUInt64Key('def').toHex()).to.equal('B0AC5222678F0D8E');
+            expect(KeyGenerator.generateUInt64Key('abc').toHex()).to.equal('B225E24FA75D983A');
         })
     })
 });