diff --git a/.prettierrc b/.prettierrc
new file mode 100644
index 0000000..52aa6b3
--- /dev/null
+++ b/.prettierrc
@@ -0,0 +1,6 @@
+{
+    "tabWidth": 4,
+    "useTabs": false,
+    "singleQuote": true
+}
+  
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
index 05cdbbb..dbecacd 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,13 +1,8 @@
 {
   "files.exclude": {
-    "lib": true,
     "yarn.lock": true,
     "yarn-error.log": true,
-    ".prettierrc": true,
-    ".gitignore": true,
     "node_modules": true,
-    ".vscode": true,
-    ".github": false,
     "coverage": true
   }
 }
\ No newline at end of file
diff --git a/README.md b/README.md
index 4747765..faab5d9 100644
--- a/README.md
+++ b/README.md
@@ -40,3 +40,4 @@ yarn add sunflake
 ## LICENSE
 
 This package is licensed under the [GNU Lesser General Public License](https://www.gnu.org/licenses/lgpl-3.0).
+Hexadecimal to decimal convertion within this package is sourced from [hex2dec](http://www.danvk.org/hex2dec.html), which is licensed under the [Apache 2.0](https://www.apache.org/licenses/LICENSE-2.0.html) license.
diff --git a/package.json b/package.json
index bc1e041..6280176 100644
--- a/package.json
+++ b/package.json
@@ -25,6 +25,7 @@
     "devDependencies": {
         "@types/jest": "^27.0.3",
         "@types/node": "^17.0.2",
+        "@types/yup": "^0.29.13",
         "@typescript-eslint/parser": "^5.2.0",
         "chalk": "4.0.0",
         "eslint": "^8.4.0",
@@ -35,7 +36,8 @@
         "jest": "^27.4.4",
         "ts-jest": "^27.1.1",
         "ts-node": "^10.4.0",
-        "typescript": "^4.5.2"
+        "typescript": "^4.5.2",
+        "yup": "^0.32.11"
     },
     "dependencies": {},
     "version": "0.0.1"
diff --git a/src/hex2dec.ts b/src/hex2dec.ts
new file mode 100644
index 0000000..6f6fc24
--- /dev/null
+++ b/src/hex2dec.ts
@@ -0,0 +1,91 @@
+// Adds two arrays for the given base (10 or 16), returning the result.
+// This turns out to be the only "primitive" operation we need.
+const add = (x: number[], y: number[], base: number) => {
+    let z = [];
+    let n = Math.max(x.length, y.length);
+    let carry = 0;
+    let i = 0;
+    while (i < n || carry) {
+        let xi = i < x.length ? x[i] : 0;
+        let yi = i < y.length ? y[i] : 0;
+        let zi = carry + xi + yi;
+        z.push(zi % base);
+        carry = Math.floor(zi / base);
+        i++;
+    }
+
+    return z;
+};
+
+// Returns a*x, where x is an array of decimal digits and a is an ordinary
+// JavaScript number. base is the number base of the array x.
+const multiplyByNumber = (num: number, x: number[], base: number): number[] => {
+    if (num == 0 || num < 0) return [];
+
+    let result: number[] = [];
+    let power = x;
+
+    while (num !== 0) {
+        if (num & 1) {
+            result = add(result, power, base);
+        }
+
+        num >>= 1;
+
+        if (num === 0) break;
+
+        power = add(power, power, base);
+    }
+
+    return result;
+};
+
+const parseToDigitsArray = (str: string, base: number) => {
+    let digits = str.split('');
+    let ary = [];
+    for (let i = digits.length - 1; i >= 0; i--) {
+        let n = parseInt(digits[i], base);
+
+        if (isNaN(n)) return null;
+
+        ary.push(n);
+    }
+
+    return ary;
+};
+
+const convertBase = (str: string, fromBase: number, toBase: number) => {
+    let digits = parseToDigitsArray(str, fromBase);
+
+    if (digits === null) return null;
+
+    let outArray: number[] = [];
+    let power = [1];
+    for (let i = 0; i < digits.length; i++) {
+        // inletiant: at this point, fromBase^i = power
+        if (digits[i]) {
+            outArray = add(
+                outArray,
+                multiplyByNumber(digits[i] as number, power, toBase),
+                toBase
+            );
+        }
+
+        power = multiplyByNumber(fromBase, power, toBase);
+    }
+
+    let out = '';
+    for (let i = outArray.length - 1; i >= 0; i--) {
+        out += outArray[i].toString(toBase);
+    }
+
+    return out;
+};
+
+export const hexToDec = (hexStr: string) => {
+    if (hexStr.startsWith('0x')) hexStr = hexStr.substring(2);
+    
+    hexStr = hexStr.toLowerCase();
+    
+    return convertBase(hexStr, 16, 10);
+};
diff --git a/src/index.ts b/src/index.ts
index fe9cc25..093c035 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1 +1,63 @@
-export const Sunflake = {};
\ No newline at end of file
+import { hexToDec } from './hex2dec';
+
+let lastTime: number = 0;
+let seq: number = 0;
+
+export type SunflakeConfig = {
+    machineID: number;
+    epoch: number;
+    time?: number;
+};
+
+export const generateSunflake = async (config: SunflakeConfig) => {
+    let { machineID, epoch, time } = Object.assign<
+        SunflakeConfig,
+        Partial<SunflakeConfig>
+    >(
+        {
+            epoch: 0,
+            machineID: 0,
+            time: 1,
+        },
+        config
+    ) as Required<SunflakeConfig>;
+
+    lastTime = time;
+    machineID = machineID % 1023;
+
+    const bTime = (time - epoch).toString(2);
+
+    // Get the sequence number
+    if (lastTime == time) {
+        seq++;
+
+        if (seq > 4095) {
+            seq = 0;
+
+            // Make system wait till time is been shifted by one millisecond
+            while (Date.now() <= time) {
+                await new Promise<void>((acc) => setImmediate(acc));
+            }
+        }
+    } else {
+        seq = 0;
+    }
+
+    lastTime = time;
+
+    let bSeq = seq.toString(2);
+    let bMid = machineID.toString(2);
+
+    // Create sequence binary bit
+    while (bSeq.length < 12) bSeq = '0' + bSeq;
+    while (bMid.length < 10) bMid = '0' + bMid;
+
+    const bid = bTime + bMid + bSeq;
+
+    let id = '';
+    for (let i = bid.length; i > 0; i -= 4) {
+        id = parseInt(bid.substring(i - 4, i), 2).toString(16) + id;
+    }
+
+    return hexToDec(id);
+};
diff --git a/tests/snowflake.test.ts b/tests/snowflake.test.ts
deleted file mode 100644
index f69eab4..0000000
--- a/tests/snowflake.test.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-import { Sunflake } from '../src';
-
-it('Exports Sunflake', () => {
-    expect(Sunflake);
-});
\ No newline at end of file
diff --git a/tests/sunflake.test.ts b/tests/sunflake.test.ts
new file mode 100644
index 0000000..b64ffd8
--- /dev/null
+++ b/tests/sunflake.test.ts
@@ -0,0 +1,58 @@
+import { generateSunflake } from '../src';
+
+const EPOCH: number = 1640988001000; // First second of 2022
+
+
+it('Exports Sunflake', () => {
+    expect(generateSunflake);
+});
+
+it('Generates two snowflake value', async () => {
+    const flake1 = await generateSunflake({ machineID: 1, epoch: EPOCH });
+    const flake2 = await generateSunflake({ machineID: 1, epoch: EPOCH });
+
+    expect(flake1 != flake2);
+});
+
+it('Generates two snowflake value in sync', async () => {
+    const [flake1, flake2] = await Promise.all([
+        generateSunflake({ machineID: 1, epoch: EPOCH }),
+        generateSunflake({ machineID: 1, epoch: EPOCH }),
+    ]);
+
+    expect(flake1 != flake2);
+});
+
+it('Generates two snowflake value in sync with same time', async () => {
+    const time = Date.now();
+    const [flake1, flake2] = await Promise.all([
+        generateSunflake({ machineID: 1, epoch: EPOCH, time }),
+        generateSunflake({ machineID: 1, epoch: EPOCH, time }),
+    ]);
+
+    expect(flake1 !== flake2);
+});
+
+it('Generates 500 snowflake value in sync with same time', async () => {
+    const time = Date.now();
+    const hugeList = [];
+    for (let i = 0; i <= 500; i++) {
+        hugeList.push(generateSunflake({ machineID: 1, epoch: EPOCH, time }));
+    }
+    
+    const list = await Promise.all(hugeList);
+
+    expect(new Set(list).size === list.length);
+});
+
+it('Generates 5200 snowflake value in sync with same time', async () => {
+    const time = Date.now();
+    const hugeList = [];
+    for (let i = 0; i <= 5200; i++) {
+        hugeList.push(generateSunflake({ machineID: 1, epoch: EPOCH, time }));
+    }
+
+    const list = await Promise.all(hugeList);
+
+    expect(new Set(list).size === list.length);
+});
\ No newline at end of file
diff --git a/yarn.lock b/yarn.lock
index 2da7abb..0e0a62a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -257,6 +257,13 @@
   dependencies:
     "@babel/helper-plugin-utils" "^7.16.7"
 
+"@babel/runtime@^7.15.4":
+  version "7.16.7"
+  resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.16.7.tgz#03ff99f64106588c9c403c6ecb8c3bafbbdff1fa"
+  integrity sha512-9E9FJowqAsytyOY6LG+1KuueckRL+aQW+mKvXRXnuFGyRAyepJPmEo9vgMfXUA6O9u3IeEdv9MAkppFcaQwogQ==
+  dependencies:
+    regenerator-runtime "^0.13.4"
+
 "@babel/template@^7.16.7", "@babel/template@^7.3.3":
   version "7.16.7"
   resolved "https://registry.yarnpkg.com/@babel/template/-/template-7.16.7.tgz#8d126c8701fde4d66b264b3eba3d96f07666d155"
@@ -653,6 +660,11 @@
   resolved "https://registry.yarnpkg.com/@types/json-schema/-/json-schema-7.0.9.tgz#97edc9037ea0c38585320b28964dde3b39e4660d"
   integrity sha512-qcUXuemtEu+E5wZSJHNxUXeCZhAfXKQ41D+duX+VYPde7xyEVZci+/oXKJL13tnRs9lR2pr4fod59GT6/X1/yQ==
 
+"@types/lodash@^4.14.175":
+  version "4.14.178"
+  resolved "https://registry.yarnpkg.com/@types/lodash/-/lodash-4.14.178.tgz#341f6d2247db528d4a13ddbb374bcdc80406f4f8"
+  integrity sha512-0d5Wd09ItQWH1qFbEyQ7oTQ3GZrMfth5JkbN3EvTKLXcHLRDSXeLnlvlOn0wvxVIwK5o2M8JzP/OWz7T3NRsbw==
+
 "@types/node@*", "@types/node@^17.0.2":
   version "17.0.6"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-17.0.6.tgz#cc1589c9ee853b389e67e8fb4384e0f250a139b9"
@@ -685,6 +697,11 @@
   dependencies:
     "@types/yargs-parser" "*"
 
+"@types/yup@^0.29.13":
+  version "0.29.13"
+  resolved "https://registry.yarnpkg.com/@types/yup/-/yup-0.29.13.tgz#21b137ba60841307a3c8a1050d3bf4e63ad561e9"
+  integrity sha512-qRyuv+P/1t1JK1rA+elmK1MmCL1BapEzKKfbEhDBV/LMMse4lmhZ/XbgETI39JveDJRpLjmToOI6uFtMW/WR2g==
+
 "@typescript-eslint/experimental-utils@^5.0.0":
   version "5.8.1"
   resolved "https://registry.yarnpkg.com/@typescript-eslint/experimental-utils/-/experimental-utils-5.8.1.tgz#01861eb2f0749f07d02db342b794145a66ed346f"
@@ -2425,6 +2442,11 @@ locate-path@^5.0.0:
   dependencies:
     p-locate "^4.1.0"
 
+lodash-es@^4.17.21:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash-es/-/lodash-es-4.17.21.tgz#43e626c46e6591b7750beb2b50117390c609e3ee"
+  integrity sha512-mKnC+QJ9pWVzv+C4/U3rRsHapFfHvQFoFB92e52xeyGMcX6/OlIl78je1u8vePzYZSkkogMPJ2yjxxsb89cxyw==
+
 lodash.memoize@4.x:
   version "4.1.2"
   resolved "https://registry.yarnpkg.com/lodash.memoize/-/lodash.memoize-4.1.2.tgz#bcc6c49a42a2840ed997f323eada5ecd182e0bfe"
@@ -2528,6 +2550,11 @@ multimap@^1.1.0:
   resolved "https://registry.yarnpkg.com/multimap/-/multimap-1.1.0.tgz#5263febc085a1791c33b59bb3afc6a76a2a10ca8"
   integrity sha512-0ZIR9PasPxGXmRsEF8jsDzndzHDj7tIav+JUmvIFB/WHswliFnquxECT/De7GR4yg99ky/NlRKJT82G1y271bw==
 
+nanoclone@^0.2.1:
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/nanoclone/-/nanoclone-0.2.1.tgz#dd4090f8f1a110d26bb32c49ed2f5b9235209ed4"
+  integrity sha512-wynEP02LmIbLpcYw8uBKpcfF6dmg2vcpKqxeH5UcoKEYdExslsdUA4ugFauuaeYdTB76ez6gJW8XAZ6CgkXYxA==
+
 natural-compare@^1.4.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/natural-compare/-/natural-compare-1.4.0.tgz#4abebfeed7541f2c27acfb29bdbbd15c8d5ba4f7"
@@ -2734,6 +2761,11 @@ prompts@^2.0.1:
     kleur "^3.0.3"
     sisteransi "^1.0.5"
 
+property-expr@^2.0.4:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/property-expr/-/property-expr-2.0.4.tgz#37b925478e58965031bb612ec5b3260f8241e910"
+  integrity sha512-sFPkHQjVKheDNnPvotjQmm3KD3uk1fWKUN7CrpdbwmUx3CrG3QiM8QpTSimvig5vTXmTvjz7+TDvXOI9+4rkcg==
+
 psl@^1.1.33:
   version "1.8.0"
   resolved "https://registry.yarnpkg.com/psl/-/psl-1.8.0.tgz#9326f8bcfb013adcc005fdff056acce020e51c24"
@@ -2773,6 +2805,11 @@ read-pkg@^5.2.0:
     parse-json "^5.0.0"
     type-fest "^0.6.0"
 
+regenerator-runtime@^0.13.4:
+  version "0.13.9"
+  resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.13.9.tgz#8925742a98ffd90814988d7566ad30ca3b263b52"
+  integrity sha512-p3VT+cOEgxFsRRA9X4lkI1E+k2/CtnKtU4gcxyaCUreilL/vqI6CdZ3wxVUx3UOUg+gnUOQQcRI7BmSI656MYA==
+
 regexp-tree@^0.1.23, regexp-tree@~0.1.1:
   version "0.1.24"
   resolved "https://registry.yarnpkg.com/regexp-tree/-/regexp-tree-0.1.24.tgz#3d6fa238450a4d66e5bc9c4c14bb720e2196829d"
@@ -3090,6 +3127,11 @@ to-regex-range@^5.0.1:
   dependencies:
     is-number "^7.0.0"
 
+toposort@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/toposort/-/toposort-2.0.2.tgz#ae21768175d1559d48bef35420b2f4962f09c330"
+  integrity sha1-riF2gXXRVZ1IvvNUILL0li8JwzA=
+
 tough-cookie@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/tough-cookie/-/tough-cookie-4.0.0.tgz#d822234eeca882f991f0f908824ad2622ddbece4"
@@ -3370,3 +3412,16 @@ yn@3.1.1:
   version "3.1.1"
   resolved "https://registry.yarnpkg.com/yn/-/yn-3.1.1.tgz#1e87401a09d767c1d5eab26a6e4c185182d2eb50"
   integrity sha512-Ux4ygGWsu2c7isFWe8Yu1YluJmqVhxqK2cLXNQA5AcC3QfbGNpM7fu0Y8b/z16pXLnFxZYvWhd3fhBY9DLmC6Q==
+
+yup@^0.32.11:
+  version "0.32.11"
+  resolved "https://registry.yarnpkg.com/yup/-/yup-0.32.11.tgz#d67fb83eefa4698607982e63f7ca4c5ed3cf18c5"
+  integrity sha512-Z2Fe1bn+eLstG8DRR6FTavGD+MeAwyfmouhHsIUgaADz8jvFKbO/fXc2trJKZg+5EBjh4gGm3iU/t3onKlXHIg==
+  dependencies:
+    "@babel/runtime" "^7.15.4"
+    "@types/lodash" "^4.14.175"
+    lodash "^4.17.21"
+    lodash-es "^4.17.21"
+    nanoclone "^0.2.1"
+    property-expr "^2.0.4"
+    toposort "^2.0.2"