[CI Skip] release/stable 2.18.1

skip-checks: true

CHANGELOG.md

@@ -1,5 +1,37 @@
 # CHANGELOG
 
+## 2.18.1 Jul 13, 2020
+
+- Add `base64{Decode, Encode, Validate}` as crypto utils
+- Extract `base58Validate` from base58 decode checks
+- Add `isAscii` to allow detection of printable ASCII sequences (including tab, newline)
+- Add `isUtf8` to allow detection of valid Utf8 sequences
+
+## 2.17.1 Jul 6, 2020
+
+- Add `encode{Derived, Multi}Address` to encode derived/multi addresses
+- Correctly handle 0 inputs in `numberToU8a`
+- Simplify and flatten base58 dependencies
+
+## 2.16.1 Jun 29, 2020
+
+- Adjust `addressCheck` and `encodeAddress` function to check for valid base58 alphabets (better error reporting)
+- Rename `createKeySub` to `createKeyDerived` based on changed in Substrate (sub keys now named derived)
+
+## 2.15.1 Jun 22, 2020
+
+- Adjust keyring to no override 0-prefix (Polkadot live) settings with keychain default
+
+## 2.14.1 Jun 16, 2020
+
+- Add `extractTime` utility conversion (Thanks to https://github.com/kwingram25)
+
+## 2.13.1 Jun 8, 2020
+
+- Fix JS blake2 fallback (non-wasm) to correctly deal with hex inputs
+- Align `bnToHex` signature with `bnToU8a` (with old/new style)
+- Allow `bnTo{Hex,U8a}` to take any value with `.toBn()` signatures
+
 ## 2.12.2 Jun 1, 2020
 
 - Fix `isFunction` signature to assert `Function`

lerna.json

@@ -9,5 +9,5 @@
   "packages": [
     "packages/*"
   ],
-  "version": "2.12.2"
+  "version": "2.18.1"
 }

package.json

@@ -21,10 +21,10 @@
     "test:one": "polkadot-dev-run-test"
   },
   "devDependencies": {
-    "@babel/core": "^7.9.6",
-    "@polkadot/dev": "^0.55.6",
-    "@polkadot/ts": "^0.3.25",
-    "@types/jest": "^25.2.3"
+    "@babel/core": "^7.10.4",
+    "@polkadot/dev": "^0.55.21",
+    "@polkadot/ts": "^0.3.27",
+    "@types/jest": "^26.0.4"
   },
-  "version": "2.12.2"
+  "version": "2.18.1"
 }

packages/keyring/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/keyring",
-  "version": "2.12.2",
+  "version": "2.18.1",
   "description": "Keyring management",
   "main": "index.js",
   "publishConfig": {
@@ -27,8 +27,8 @@
   },
   "homepage": "https://github.com/polkadot-js/common/tree/master/packages/keyring#readme",
   "dependencies": {
-    "@babel/runtime": "^7.9.6",
-    "@polkadot/util": "2.12.2",
-    "@polkadot/util-crypto": "2.12.2"
+    "@babel/runtime": "^7.10.4",
+    "@polkadot/util": "2.18.1",
+    "@polkadot/util-crypto": "2.18.1"
   }
 }

packages/keyring/src/index.spec.ts

@@ -212,4 +212,24 @@ describe('keypair', (): void => {
       expect(pair.verify(MESSAGE, signature)).toBe(true);
     });
   });
+
+  describe('util', (): void => {
+    let keyring: Keyring;
+
+    beforeEach((): void => {
+      keyring = new Keyring({ ss58Format: 42 });
+    });
+
+    it('can re-encode an address to Polkadot live', (): void => {
+      expect(
+        keyring.encodeAddress('5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY', 0)
+      ).toEqual('15oF4uVJwmo4TdGW7VfQxNLavjCXviqxT9S1MgbjMNHr6Sp5');
+    });
+
+    it('can re-encode an address to keyring default', (): void => {
+      expect(
+        keyring.encodeAddress('15oF4uVJwmo4TdGW7VfQxNLavjCXviqxT9S1MgbjMNHr6Sp5')
+      ).toEqual('5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY');
+    });
+  });
 });

packages/keyring/src/keyring.ts

@@ -5,7 +5,7 @@
 import { KeypairType, Keypair } from '@polkadot/util-crypto/types';
 import { KeyringInstance, KeyringPair, KeyringPair$Json, KeyringPair$Meta, KeyringOptions } from './types';
 
-import { assert, hexToU8a, isHex, stringToU8a } from '@polkadot/util';
+import { assert, hexToU8a, isHex, isUndefined, stringToU8a } from '@polkadot/util';
 import { decodeAddress, encodeAddress, keyExtractSuri, keyFromPath, naclKeypairFromSeed as naclFromSeed, schnorrkelKeypairFromSeed as schnorrkelFromSeed, secp256k1KeypairFromSeed as secp256k1FromSeed, mnemonicToMiniSecret } from '@polkadot/util-crypto';
 
 import { DEV_PHRASE } from './defaults';
@@ -192,7 +192,7 @@ export default class Keyring implements KeyringInstance {
    * @description Encodes the input into an ss58 representation
    */
   public encodeAddress = (address: Uint8Array | string, ss58Format?: number): string => {
-    return encodeAddress(address, ss58Format || this.#ss58);
+    return encodeAddress(address, isUndefined(ss58Format) ? this.#ss58 : ss58Format);
   }
 
   /**

packages/util-crypto/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/util-crypto",
-  "version": "2.12.2",
+  "version": "2.18.1",
   "description": "A collection of useful crypto utilities for @polkadot",
   "main": "index.js",
   "keywords": [
@@ -25,23 +25,21 @@
   },
   "homepage": "https://github.com/polkadot-js/common/tree/master/packages/util-crypto#readme",
   "dependencies": {
-    "@babel/runtime": "^7.9.6",
-    "@polkadot/util": "2.12.2",
+    "@babel/runtime": "^7.10.4",
+    "@polkadot/util": "2.18.1",
     "@polkadot/wasm-crypto": "^1.2.1",
     "base-x": "^3.0.8",
     "bip39": "^3.0.2",
     "blakejs": "^1.1.0",
     "bn.js": "^5.1.2",
-    "bs58": "^4.0.1",
-    "elliptic": "^6.5.2",
+    "elliptic": "^6.5.3",
     "js-sha3": "^0.8.0",
-    "pbkdf2": "^3.0.17",
+    "pbkdf2": "^3.1.1",
     "tweetnacl": "^1.0.3",
     "xxhashjs": "^0.2.2"
   },
   "devDependencies": {
     "@types/bn.js": "^4.11.6",
-    "@types/bs58": "^4.0.1",
     "@types/elliptic": "^6.4.12",
     "@types/pbkdf2": "^3.0.0",
     "@types/xxhashjs": "^0.2.2"

packages/util-crypto/src/address/check.spec.ts

@@ -17,6 +17,12 @@ describe('checkAddress', (): void => {
     ).toEqual([true, null]);
   });
 
+  it('fails when an invalid base58 character is supplied', (): void => {
+    expect(
+      checkAddress('5EnxIUmEbw8DkENKiYuZ1DwQuMoB2UWEQJZZXrTsxoz7SpgG', 2)
+    ).toEqual([false, 'Invalid base58 character "I" (0x49) at index 4']);
+  });
+
   it('fails with invalid prefix when checking Substrate against Kusama prefix', (): void => {
     expect(
       checkAddress('5EnxxUmEbw8DkENKiYuZ1DwQuMoB2UWEQJZZXrTsxoz7SpgG', 2)

packages/util-crypto/src/address/check.ts

@@ -4,13 +4,24 @@
 
 import { Prefix } from './types';
 
-import bs58 from 'bs58';
-
+import base58Decode from '../base58/decode';
 import checkChecksum from './checkChecksum';
 import defaults from './defaults';
 
+/**
+ * @name checkAddress
+ * @summary Validates an ss58 address.
+ * @description
+ * From the provided input, validate that the address is a valid input.
+ */
 export default function check (address: string, prefix: Prefix): [boolean, string | null] {
-  const decoded = bs58.decode(address);
+  let decoded;
+
+  try {
+    decoded = base58Decode(address);
+  } catch (error) {
+    return [false, (error as Error).message];
+  }
 
   if (decoded[0] !== prefix) {
     return [false, `Prefix mismatch, expected ${prefix}, found ${decoded[0]}`];

packages/util-crypto/src/address/decode.spec.ts

@@ -94,4 +94,10 @@ describe('decode', (): void => {
       (): Uint8Array => decode('5GoKvZWG5ZPYL1WUovuHW3zJBWBP5eT8CbqjdRY4Q6iMaDwU')
     ).toThrow(/address checksum/);
   });
+
+  it('fails when invalid base58 encoded address is found', (): void => {
+    expect(
+      () => u8aToHex(decode('F3opIRbN5ZbjJNU511Kj2TLuzFcDq9BGduA9TgiECafpg29'))
+    ).toThrow(/Decoding F3opIRbN5ZbjJNU511Kj2TLuzFcDq9BGduA9TgiECafpg29: Invalid base58 character "I" \(0x49\) at index 4/);
+  });
 });

packages/util-crypto/src/address/decode.ts

@@ -6,9 +6,9 @@ import { Prefix } from './types';
 
 // Original implementation: https://github.com/paritytech/polka-ui/blob/4858c094684769080f5811f32b081dd7780b0880/src/polkadot.js#L6
 
-import bs58 from 'bs58';
-import { assert, bufferToU8a, isHex, isU8a, u8aToU8a } from '@polkadot/util';
+import { assert, isHex, isU8a, u8aToU8a } from '@polkadot/util';
 
+import base58Decode from '../base58/decode';
 import checkChecksum from './checkChecksum';
 import defaults from './defaults';
 
@@ -18,11 +18,17 @@ export default function decode (encoded: string | Uint8Array, ignoreChecksum?: b
     return u8aToU8a(encoded);
   }
 
-  const decoded = bufferToU8a(bs58.decode(encoded));
-  const error = (message: string) => `Decoding ${encoded as string}: ${message}`;
+  const wrapError = (message: string) => `Decoding ${encoded as string}: ${message}`;
+  let decoded;
+
+  try {
+    decoded = base58Decode(encoded);
+  } catch (error) {
+    throw new Error(wrapError((error as Error).message));
+  }
 
   // assert(defaults.allowedPrefix.includes(decoded[0] as Prefix), error('Invalid decoded address prefix'));
-  assert(defaults.allowedEncodedLengths.includes(decoded.length), error('Invalid decoded address length'));
+  assert(defaults.allowedEncodedLengths.includes(decoded.length), wrapError('Invalid decoded address length'));
 
   // TODO Unless it is an "use everywhere" prefix, throw an error
   // if (decoded[0] !== prefix) {
@@ -31,7 +37,7 @@ export default function decode (encoded: string | Uint8Array, ignoreChecksum?: b
 
   const [isValid, endPos] = checkChecksum(decoded);
 
-  assert(ignoreChecksum || isValid, error('Invalid decoded address checksum'));
+  assert(ignoreChecksum || isValid, wrapError('Invalid decoded address checksum'));
 
   return decoded.slice(1, endPos);
 }

packages/util-crypto/src/address/encode.spec.ts

@@ -21,6 +21,12 @@ describe('encode', (): void => {
     ).toEqual('7sL6eNJj5ZGV5cn3hhV2deRUsivXfBfMH76wCALCqWj1EKzv');
   });
 
+  it('can re-encode an address to Polkadot live', (): void => {
+    expect(
+      encode('5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY', 0)
+    ).toEqual('15oF4uVJwmo4TdGW7VfQxNLavjCXviqxT9S1MgbjMNHr6Sp5');
+  });
+
   it('fails when non-valid publicKey provided', (): void => {
     expect(
       (): string => encode(

packages/util-crypto/src/address/encode.ts

@@ -6,9 +6,9 @@ import { Prefix } from './types';
 
 // Original implementation: https://github.com/paritytech/polka-ui/blob/4858c094684769080f5811f32b081dd7780b0880/src/polkadot.js#L34
 
-import bs58 from 'bs58';
-import { assert, u8aConcat, u8aToBuffer } from '@polkadot/util';
+import { assert, u8aConcat } from '@polkadot/util';
 
+import base58Encode from '../base58/encode';
 import decode from './decode';
 import defaults from './defaults';
 import sshash from './sshash';
@@ -23,9 +23,7 @@ export default function encode (_key: Uint8Array | string, ss58Format: Prefix =
   const input = u8aConcat(new Uint8Array([ss58Format]), key);
   const hash = sshash(input);
 
-  return bs58.encode(
-    u8aToBuffer(
-      u8aConcat(input, hash.subarray(0, isPublicKey ? 2 : 1))
-    )
+  return base58Encode(
+    u8aConcat(input, hash.subarray(0, isPublicKey ? 2 : 1))
   );
 }

packages/util-crypto/src/address/encodeDerived.spec.ts

@@ -0,0 +1,13 @@
+// Copyright 2017-2020 @polkadot/util-crypto authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import encodeDerivedAddress from './encodeDerived';
+
+describe('encodeDerivedAddress', (): void => {
+  it('creates a valid known derived address', (): void => {
+    expect(
+      encodeDerivedAddress('5GvUh7fGKsdBEh5XpypkfkGuf7j3vXLxH9BdxjxnJNVXRYi1', 0)
+    ).toEqual('5E5XxqPxm7QbEs6twYfp3tyjXidn4kqRrNPH4o6JK9JSLUeD');
+  });
+});

packages/util-crypto/src/address/encodeDerived.ts

@@ -0,0 +1,21 @@
+// Copyright 2017-2020 @polkadot/util-crypto authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { Prefix } from './types';
+
+import BN from 'bn.js';
+
+import decode from './decode';
+import encode from './encode';
+import keyDerived from './keyDerived';
+
+/**
+ * @name encodeDerivedAddress
+ * @summary Creates a derived address.
+ * @description
+ * Creates a Substrate derived address based on the input address/publicKey and the index supplied.
+ */
+export default function encodeDerivedAddress (who: Uint8Array | string, index: BigInt | BN | number, ss58Format?: Prefix): string {
+  return encode(keyDerived(decode(who), index), ss58Format);
+}

packages/util-crypto/src/address/encodeMulti.spec.ts

@@ -0,0 +1,17 @@
+// Copyright 2017-2020 @polkadot/util-crypto authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import encodeMultiAddress from './encodeMulti';
+
+describe('encodeMultiAddress', (): void => {
+  it('creates a valid known multi address', (): void => {
+    expect(
+      encodeMultiAddress([
+        '5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY',
+        '5FHneW46xGXgs5mUiveU4sbTyGBzmstUspZC92UhjJM694ty',
+        '5FLSigC9HGRKVhB9FiEo4Y3koPsNmBmLJbpXg2mp1hXcS59Y'
+      ], 2)
+    ).toEqual('5DjYJStmdZ2rcqXbXGX7TW85JsrW6uG4y9MUcLq2BoPMpRA7');
+  });
+});

packages/util-crypto/src/address/encodeMulti.ts

@@ -0,0 +1,20 @@
+// Copyright 2017-2020 @polkadot/util-crypto authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { Prefix } from './types';
+
+import BN from 'bn.js';
+
+import encode from './encode';
+import keyMulti from './keyMulti';
+
+/**
+ * @name encodeMultiAddress
+ * @summary Creates a multisig address.
+ * @description
+ * Creates a Substrate multisig address based on the input address and the required threshold.
+ */
+export default function encodeMultiAddress (who: (Uint8Array | string)[], threshold: BigInt | BN | number, ss58Format?: Prefix): string {
+  return encode(keyMulti(who, threshold), ss58Format);
+}

packages/util-crypto/src/address/index.ts

@@ -5,9 +5,11 @@
 import checkAddress from './check';
 import checkAddressChecksum from './checkChecksum';
 import createKeyMulti from './keyMulti';
-import createKeySub from './keySub';
+import createKeyDerived from './keyDerived';
 import decodeAddress from './decode';
 import encodeAddress from './encode';
+import encodeDerivedAddress from './encodeDerived';
+import encodeMultiAddress from './encodeMulti';
 import addressEq from './eq';
 import setSS58Format from './setSS58Format';
 import sortAddresses from './sort';
@@ -16,10 +18,12 @@ export {
   addressEq,
   checkAddress,
   checkAddressChecksum,
+  createKeyDerived,
   createKeyMulti,
-  createKeySub,
   decodeAddress,
   encodeAddress,
+  encodeDerivedAddress,
+  encodeMultiAddress,
   setSS58Format,
   sortAddresses
 };

packages/util-crypto/src/address/keyDerived.spec.ts

@@ -2,12 +2,12 @@
 // This software may be modified and distributed under the terms
 // of the Apache-2.0 license. See the LICENSE file for details.
 
-import createKeySub from './keySub';
+import createKeyDerived from './keyDerived';
 
-describe('createKeySub', (): void => {
+describe('createKeyDerived', (): void => {
   it('matches sub accounts with Rust', (): void => {
     expect(
-      createKeySub(new Uint8Array([1, 0, 0, 0, 0, 0, 0, 0]), 0)
+      createKeyDerived(new Uint8Array([1, 0, 0, 0, 0, 0, 0, 0]), 0)
     ).toEqual(
       new Uint8Array([234, 236, 28, 96, 177, 168, 152, 193, 71, 179, 226, 102, 179, 155, 188, 240, 90, 182, 21, 175, 47, 47, 250, 179, 178, 0, 81, 222, 70, 56, 52, 234])
     );
@@ -15,7 +15,7 @@ describe('createKeySub', (): void => {
 
   it('creates a valid subkey', (): void => {
     expect(
-      createKeySub('5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY', 1)
+      createKeyDerived('5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY', 1)
     ).toEqual(
       new Uint8Array([248, 19, 86, 209, 254, 89, 84, 48, 54, 128, 166, 239, 153, 212, 143, 34, 191, 60, 210, 50, 39, 77, 122, 71, 29, 60, 247, 198, 95, 101, 246, 83])
     );

packages/util-crypto/src/address/keyDerived.ts

@@ -10,7 +10,7 @@ import decodeAddress from './decode';
 
 const PREFIX = stringToU8a('modlpy/utilisuba');
 
-export default function createKeySub (who: Uint8Array | string, index: BigInt | BN | number): Uint8Array {
+export default function createKeyDerived (who: Uint8Array | string, index: BigInt | BN | number): Uint8Array {
   return blake2AsU8a(
     u8aConcat(
       PREFIX,

packages/util-crypto/src/base58/bs58.ts

@@ -0,0 +1,15 @@
+// Copyright 2017-2020 @polkadot/util-crypto authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import baseX from 'base-x';
+
+// https://github.com/cryptocoinjs/base-x#alphabets
+const BASE58_ALPHABET = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz';
+
+const bs58 = baseX(BASE58_ALPHABET);
+
+export {
+  BASE58_ALPHABET,
+  bs58
+};

packages/util-crypto/src/base58/decode.ts

@@ -0,0 +1,20 @@
+// Copyright 2017-2020 @polkadot/util-crypto authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { bufferToU8a } from '@polkadot/util';
+
+import { bs58 } from './bs58';
+import validate from './validate';
+
+/**
+ * @name base58Decode
+ * @summary Decodes a base58 value.
+ * @description
+ * From the provided input, decode the base58 and return the result as an `Uint8Array`.
+ */
+export default function base58Decode (value: string): Uint8Array {
+  validate(value);
+
+  return bufferToU8a(bs58.decode(value));
+}

packages/util-crypto/src/base58/encode.ts

@@ -0,0 +1,19 @@
+// Copyright 2017-2020 @polkadot/util-crypto authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { u8aToBuffer, u8aToU8a } from '@polkadot/util';
+
+import { bs58 } from './bs58';
+
+/**
+ * @name base58Encode
+ * @summary Creates a base58 value.
+ * @description
+ * From the provided input, create the base58 and return the result as a string.
+ */
+export default function base58Encode (value: Uint8Array | string | Buffer | number[]): string {
+  return bs58.encode(
+    u8aToBuffer(u8aToU8a(value))
+  );
+}

packages/util-crypto/src/base58/index.ts

@@ -0,0 +1,11 @@
+// Copyright 2017-2020 @polkadot/util-crypto authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+/**
+ * @summary Encode and decode base58 values
+ */
+
+export { default as base58Decode } from './decode';
+export { default as base58Encode } from './encode';
+export { default as base58Validate } from './validate';

packages/util-crypto/src/base58/validate.ts

@@ -0,0 +1,21 @@
+// Copyright 2017-2020 @polkadot/util-crypto authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { BASE58_ALPHABET } from './bs58';
+
+/**
+ * @name base58Validate
+ * @summary Validates a base58 value.
+ * @description
+ * Validates the the supplied value is valid base58
+ */
+export default function base58Validate (value: string): true {
+  for (let i = 0; i < value.length; i++) {
+    if (!BASE58_ALPHABET.includes(value[i])) {
+      throw new TypeError(`Invalid base58 character "${value[i]}" (0x${value.charCodeAt(i).toString(16)}) at index ${i}`);
+    }
+  }
+
+  return true;
+}

packages/util-crypto/src/base64/decode.spec.ts

@@ -0,0 +1,17 @@
+// Copyright 2017-2020 @polkadot/util-crypto authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { stringToU8a } from '@polkadot/util';
+
+import { base64Decode } from '.';
+
+describe('base64Decode', (): void => {
+  it('decodes a mixed base64 utf8 string', (): void => {
+    expect(
+      base64Decode('aGVsbG8gd29ybGQg0J/RgNC40LLQtdGC0YHRgtCy0YPRjiDQvNC4IOS9oOWlvQ==')
+    ).toEqual(
+      stringToU8a('hello world Приветствую ми 你好')
+    );
+  });
+});

packages/util-crypto/src/base64/decode.ts

@@ -0,0 +1,19 @@
+// Copyright 2017-2020 @polkadot/util-crypto authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { bufferToU8a } from '@polkadot/util';
+
+import validate from './validate';
+
+/**
+ * @name base64Decode
+ * @summary Decodes a base64 value.
+ * @description
+ * From the provided input, decode the base64 and return the result as an `Uint8Array`.
+ */
+export default function base64Decode (value: string): Uint8Array {
+  validate(value);
+
+  return bufferToU8a(Buffer.from(value, 'base64'));
+}

packages/util-crypto/src/base64/encode.spec.ts

@@ -0,0 +1,13 @@
+// Copyright 2017-2020 @polkadot/util-crypto authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { base64Encode } from '.';
+
+describe('base64Encode', (): void => {
+  it('encodes a mixed base64 utf8 string', (): void => {
+    expect(
+      base64Encode('hello world Приветствую ми 你好')
+    ).toEqual('aGVsbG8gd29ybGQg0J/RgNC40LLQtdGC0YHRgtCy0YPRjiDQvNC4IOS9oOWlvQ==');
+  });
+});

packages/util-crypto/src/base64/encode.ts

@@ -0,0 +1,15 @@
+// Copyright 2017-2020 @polkadot/util-crypto authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { u8aToBuffer, u8aToU8a } from '@polkadot/util';
+
+/**
+ * @name base64Encode
+ * @summary Creates a base64 value.
+ * @description
+ * From the provided input, create the base64 and return the result as a string.
+ */
+export default function base58Encode (value: Uint8Array | string | Buffer | number[]): string {
+  return u8aToBuffer(u8aToU8a(value)).toString('base64');
+}

packages/util-crypto/src/base64/index.ts

@@ -0,0 +1,11 @@
+// Copyright 2017-2020 @polkadot/util-crypto authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+/**
+ * @summary Encode and decode base64 values
+ */
+
+export { default as base64Decode } from './decode';
+export { default as base64Encode } from './encode';
+export { default as base64Validate } from './validate';

packages/util-crypto/src/base64/validate.spec.ts

@@ -0,0 +1,13 @@
+// Copyright 2017-2020 @polkadot/util-crypto authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { base64Validate } from '.';
+
+describe('base64Validate', (): void => {
+  it('decodes a mixed base64 utf8 string', (): void => {
+    expect(
+      () => base64Validate('aGVsbG8gd29ybGQg0J/RgNC40LLQtd^GC0YHRgtCy0YPRjiDQvNC4IOS9oOWlvQ==')
+    ).toThrow(/Invalid base64 encoding/);
+  });
+});

packages/util-crypto/src/base64/validate.ts

@@ -0,0 +1,17 @@
+// Copyright 2017-2020 @polkadot/util-crypto authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+/**
+ * @name base64Validate
+ * @summary Validates a base64 value.
+ * @description
+ * Validates the the supplied value is valid base64
+ */
+export default function base64Validate (value: string): true {
+  if (!(/^(?:[A-Za-z0-9+/]{2}[A-Za-z0-9+/]{2})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$/.test(value))) {
+    throw new TypeError('Invalid base64 encoding');
+  }
+
+  return true;
+}

packages/util-crypto/src/blake2/asU8a.spec.ts

@@ -43,4 +43,18 @@ describe('blake2AsU8a', (): void => {
       hexToU8a('0xba80a53f981c4d0d6a2797b69f12f6e94c212f14685ac4b74b12bb6fdbffa2d17d87c5392aab792dc252d5de4533cc9518d38aa8dbf1925ab92386edd4009923')
     );
   });
+
+  it('has equivalent Wasm/Js outputs on hex inputs', (): void => {
+    const a = blake2AsU8a('0x123456', 256, null, false);
+    const b = blake2AsU8a('0x123456', 256, null, true);
+
+    expect(a).toEqual(b);
+  });
+
+  it('has equivalent Wasm/Js outputs with key inputs', (): void => {
+    const a = blake2AsU8a('0x123456', 256, new Uint8Array([1, 2]), false);
+    const b = blake2AsU8a('0x123456', 256, new Uint8Array([1, 2]), true);
+
+    expect(a).toEqual(b);
+  });
 });

packages/util-crypto/src/blake2/asU8a.ts

@@ -20,10 +20,10 @@ import { blake2b, isReady } from '@polkadot/wasm-crypto';
  * blake2AsU8a('abc'); // => [0xba, 0x80, 0xa53, 0xf98, 0x1c, 0x4d, 0x0d]
  * ```
  */
-export default function blake2AsU8a (data: Uint8Array | string, bitLength = 256, key: Uint8Array | null = null): Uint8Array {
+export default function blake2AsU8a (data: Uint8Array | string, bitLength = 256, key: Uint8Array | null = null, onlyJs = false): Uint8Array {
   const byteLength = Math.ceil(bitLength / 8);
 
-  return isReady()
+  return isReady() && !onlyJs
     ? blake2b(u8aToU8a(data), u8aToU8a(key), byteLength)
-    : blakejs.blake2b(data, key, byteLength);
+    : blakejs.blake2b(u8aToU8a(data), key, byteLength);
 }

packages/util-crypto/src/index.ts

@@ -10,6 +10,8 @@ export * from './init';
 
 // all internal exports
 export * from './address';
+export * from './base58';
+export * from './base64';
 export * from './blake2';
 export * from './keccak';
 export * from './key';

packages/util/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/util",
-  "version": "2.12.2",
+  "version": "2.18.1",
   "description": "A collection of useful utilities for @polkadot",
   "main": "index.js",
   "keywords": [
@@ -25,11 +25,11 @@
   },
   "homepage": "https://github.com/polkadot-js/common/tree/master/packages/util#readme",
   "dependencies": {
-    "@babel/runtime": "^7.9.6",
+    "@babel/runtime": "^7.10.4",
     "@types/bn.js": "^4.11.6",
     "bn.js": "^5.1.2",
     "camelcase": "^5.3.1",
-    "chalk": "^4.0.0",
+    "chalk": "^4.1.0",
     "ip-regex": "^4.1.0"
   }
 }

packages/util/src/bn/consts.spec.ts

@@ -0,0 +1,38 @@
+// Copyright 2017-2020 @polkadot/util authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { BN_ZERO, BN_ONE, BN_TEN, BN_HUNDRED, BN_THOUSAND } from '.';
+import BN from 'bn.js';
+
+describe('consts', (): void => {
+  it('BN_ZERO equals 0', (): void => {
+    expect(
+      BN_ZERO
+    ).toEqual(new BN(0));
+  });
+
+  it('BN_ONE equals 1', (): void => {
+    expect(
+      BN_ONE
+    ).toEqual(new BN(1));
+  });
+
+  it('BN_TEN equals 10', (): void => {
+    expect(
+      BN_TEN
+    ).toEqual(new BN(10));
+  });
+
+  it('BN_HUNDRED equals 100', (): void => {
+    expect(
+      BN_HUNDRED
+    ).toEqual(new BN(100));
+  });
+
+  it('BN_THOUSAND equals 1000', (): void => {
+    expect(
+      BN_THOUSAND
+    ).toEqual(new BN(1000));
+  });
+});

packages/util/src/bn/consts.ts

@@ -0,0 +1,43 @@
+// Copyright 2017-2020 @polkadot/util authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import BN from 'bn.js';
+
+/**
+ * @name BN_ZERO
+ * @summary BN constant for 0.
+ */
+const BN_ZERO: BN = new BN(0);
+
+/**
+ * @name BN_ONE
+ * @summary BN constant for 1.
+ */
+const BN_ONE: BN = new BN(1);
+
+/**
+ * @name BN_TEN
+ * @summary BN constant for 10.
+ */
+const BN_TEN: BN = new BN(10);
+
+/**
+ * @name BN_HUNDRED
+ * @summary BN constant for 100.
+ */
+const BN_HUNDRED: BN = new BN(100);
+
+/**
+ * @name BN_THOUSAND
+ * @summary BN constant for 1000.
+ */
+const BN_THOUSAND: BN = new BN(1000);
+
+export {
+  BN_ZERO,
+  BN_ONE,
+  BN_TEN,
+  BN_HUNDRED,
+  BN_THOUSAND
+};

packages/util/src/bn/index.ts

@@ -6,6 +6,7 @@
  * @summary Utility methods to convert to and from `BN` objects
  */
 
+export * from './consts';
 export { default as bnFromHex } from './fromHex';
 export { default as bnMax } from './max';
 export { default as bnMin } from './min';

packages/util/src/bn/toHex.spec.ts

@@ -25,6 +25,12 @@ describe('bnToHex', (): void => {
     ).toBe('0x0080');
   });
 
+  it('converts BN values to a prefixed hex representation (bitLength + le)', (): void => {
+    expect(
+      bnToHex(new BN(128), 16, true)
+    ).toBe('0x8000');
+  });
+
   it('converts BN values to a prefixed hex representation (LE)', (): void => {
     expect(
       bnToHex(new BN(128), { bitLength: 16, isLe: true })

packages/util/src/bn/toHex.ts

@@ -2,11 +2,12 @@
 // This software may be modified and distributed under the terms
 // of the Apache-2.0 license. See the LICENSE file for details.
 
+import { ToBn, ToBnOptions } from '../types';
+
 import BN from 'bn.js';
 
 import isNumber from '../is/number';
 import bnToU8a from './toU8a';
-import { ToBnOptions } from '../types';
 import { u8aToHex } from '../u8a';
 
 const ZERO_STR = '0x00';
@@ -30,7 +31,9 @@ interface Options extends ToBnOptions {
  * bnToHex(new BN(0x123456)); // => '0x123456'
  * ```
  */
-export default function bnToHex (value?: BN | BigInt | number | null, options: number | Options = { bitLength: -1, isLe: false, isNegative: false }): string {
+function bnToHex <ExtToBn extends ToBn> (value?: ExtToBn | BN | BigInt | number | null, options?: Options): string;
+function bnToHex <ExtToBn extends ToBn> (value?: ExtToBn | BN | BigInt | number | null, bitLength?: number, isLe?: boolean): string;
+function bnToHex <ExtToBn extends ToBn> (value?: ExtToBn | BN | BigInt | number | null, arg1: number | Options = { bitLength: -1, isLe: false, isNegative: false }, arg2?: boolean): string {
   if (!value) {
     return ZERO_STR;
   }
@@ -39,8 +42,10 @@ export default function bnToHex (value?: BN | BigInt | number | null, options: n
     isLe: false,
     isNegative: false,
     // Backwards-compatibility
-    ...(isNumber(options) ? { bitLength: options } : options)
+    ...(isNumber(arg1) ? { bitLength: arg1, isLe: arg2 } : arg1)
   };
 
   return u8aToHex(bnToU8a(value, _options));
 }
+
+export default bnToHex;

packages/util/src/bn/toU8a.ts

@@ -2,11 +2,12 @@
 // This software may be modified and distributed under the terms
 // of the Apache-2.0 license. See the LICENSE file for details.
 
+import { ToBn, ToBnOptions } from '../types';
+
 import BN from 'bn.js';
 
 import isNumber from '../is/number';
 import bnToBn from './toBn';
-import { ToBnOptions } from '../types';
 
 interface Options extends ToBnOptions {
   bitLength?: number;
@@ -26,9 +27,9 @@ interface Options extends ToBnOptions {
  * bnToU8a(new BN(0x1234)); // => [0x12, 0x34]
  * ```
  */
-function bnToU8a (value: BN | BigInt | number | null, options?: Options): Uint8Array;
-function bnToU8a (value: BN | BigInt | number | null, bitLength?: number, isLe?: boolean): Uint8Array;
-function bnToU8a (value: BN | BigInt | number | null, arg1: number | Options = { bitLength: -1, isLe: true, isNegative: false }, arg2?: boolean): Uint8Array {
+function bnToU8a <ExtToBn extends ToBn> (value?: ExtToBn | BN | BigInt | number | null, options?: Options): Uint8Array;
+function bnToU8a <ExtToBn extends ToBn> (value?: ExtToBn | BN | BigInt | number | null, bitLength?: number, isLe?: boolean): Uint8Array;
+function bnToU8a <ExtToBn extends ToBn> (value?: ExtToBn | BN | BigInt | number | null, arg1: number | Options = { bitLength: -1, isLe: true, isNegative: false }, arg2?: boolean): Uint8Array {
   const _options: Options = {
     bitLength: -1,
     isLe: true,

packages/util/src/extractTime.spec.ts

@@ -0,0 +1,20 @@
+// Copyright 2017-2020 @polkadot/util authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { extractTime } from '.';
+
+describe('extractTime', (): void => {
+  const milliseconds = 1e9 + 123;
+
+  it('extracts time components correctly', (): void => {
+    expect(extractTime(milliseconds))
+      .toEqual({
+        days: 11,
+        hours: 13,
+        milliseconds: 123,
+        minutes: 46,
+        seconds: 40
+      });
+  });
+});

packages/util/src/extractTime.ts

@@ -0,0 +1,73 @@
+// Copyright 2017-2020 @polkadot/util authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { Time } from './types';
+
+const HRS = 60 * 60;
+const DAY = HRS * 24;
+
+/**
+ * @name addTime
+ * @summary Add together two Time arrays
+ */
+
+function addTime (a: Time, b: Time): Time {
+  return {
+    days: a.days + b.days,
+    hours: a.hours + b.hours,
+    milliseconds: a.milliseconds + b.milliseconds,
+    minutes: a.minutes + b.minutes,
+    seconds: a.seconds + b.seconds
+  };
+}
+
+const ZERO = { days: 0, hours: 0, milliseconds: 0, minutes: 0, seconds: 0 };
+
+/**
+ * @name extractTime
+ * @summary Convert a quantity of seconds to Time array representing accumulated {days, minutes, hours, seconds, milliseconds}
+ * @example
+ * <BR>
+ *
+ * ```javascript
+ * import { extractTime } from '@polkadot/util';
+ *
+ * const { days, minutes, hours, seconds, milliseconds } = extractTime(6000); // 0, 0, 10, 0, 0
+ * ```
+ */
+export default function extractTime (milliseconds?: number): Time {
+  if (!milliseconds) {
+    return ZERO;
+  } else if (milliseconds < 1000) {
+    return { ...ZERO, milliseconds };
+  }
+
+  const secs = milliseconds / 1000;
+
+  if (secs < 60) {
+    const seconds = Math.floor(secs);
+
+    return addTime({ ...ZERO, seconds }, extractTime(milliseconds - (seconds * 1000)));
+  }
+
+  const mins = secs / 60;
+
+  if (mins < 60) {
+    const minutes = Math.floor(mins);
+
+    return addTime({ ...ZERO, minutes }, extractTime(milliseconds - (minutes * 60 * 1000)));
+  }
+
+  const hrs = mins / 60;
+
+  if (hrs < 24) {
+    const hours = Math.floor(hrs);
+
+    return addTime({ ...ZERO, hours }, extractTime(milliseconds - (hours * HRS * 1000)));
+  }
+
+  const days = Math.floor(hrs / 24);
+
+  return addTime({ ...ZERO, days }, extractTime(milliseconds - (days * DAY * 1000)));
+}

packages/util/src/index.ts

@@ -10,6 +10,7 @@ import './polyfill';
 
 export { default as assert } from './assert';
 export { default as detectPackage } from './detectPackage';
+export { default as extractTime } from './extractTime';
 export { default as logger } from './logger';
 export { default as promisify } from './promisify';
 

packages/util/src/is/ascii.spec.ts

@@ -0,0 +1,31 @@
+// Copyright 2017-2020 @polkadot/util authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { isAscii } from '.';
+
+describe('isAscii', (): void => {
+  it('returns true for an ASCII string', (): void => {
+    expect(isAscii('Hello\tWorld!\n\rTesting')).toEqual(true);
+  });
+
+  it('returns true for ASCII bytes', (): void => {
+    expect(isAscii(new Uint8Array([0x31, 0x32, 0x20, 10]))).toEqual(true);
+  });
+
+  it('returns true for empty string inputs', (): void => {
+    expect(isAscii('')).toEqual(true);
+  });
+
+  it('returns true for empty U8a inputs', (): void => {
+    expect(isAscii(new Uint8Array())).toEqual(true);
+  });
+
+  it('returns false for empty undefined inputs', (): void => {
+    expect(isAscii()).toEqual(false);
+  });
+
+  it('returns false for non-printable characters', (): void => {
+    expect(isAscii(new Uint8Array([5]))).toEqual(false);
+  });
+});

packages/util/src/is/ascii.ts

@@ -0,0 +1,24 @@
+// Copyright 2017-2020 @polkadot/util authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import u8aToU8a from '../u8a/toU8a';
+import isString from './string';
+
+const FORMAT = [9, 10, 13];
+
+/**
+ * @name isAscii
+ * @summary Tests if the input is printable ASCII
+ * @description
+ * Checks to see if the input string or Uint8Array is printable ASCII, 32-127 + formatters
+ */
+export default function isAscii (value?: number[] | Buffer | Uint8Array | string | null): boolean {
+  if (!value) {
+    return isString(value);
+  }
+
+  const u8a = u8aToU8a(value);
+
+  return !u8a.some((byte) => (byte >= 127) || (byte < 32 && !FORMAT.includes(byte)));
+}

packages/util/src/is/index.ts

@@ -5,6 +5,7 @@
 /**
  * @summary Type checking utilities
  */
+export { default as isAscii } from './ascii';
 export { default as isBigInt } from './bigInt';
 export { default as isBn } from './bn';
 export { default as isBuffer } from './buffer';
@@ -25,3 +26,4 @@ export { default as isTestChain } from './testChain';
 export { default as isToBn } from './toBn';
 export { default as isU8a } from './u8a';
 export { default as isUndefined } from './undefined';
+export { default as isUtf8 } from './utf8';

packages/util/src/is/utf8.spec.ts

@@ -0,0 +1,41 @@
+// Copyright 2017-2020 @polkadot/util authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { isUtf8 } from '.';
+
+describe('isUtf8', (): void => {
+  it('returns true for an ASCII string', (): void => {
+    expect(isUtf8('Hello\tWorld!\n\rTesting')).toEqual(true);
+  });
+
+  it('returns true for ASCII bytes', (): void => {
+    expect(isUtf8(new Uint8Array([0x31, 0x32, 0x20, 10]))).toEqual(true);
+  });
+
+  it('returns true for empty string inputs', (): void => {
+    expect(isUtf8('')).toEqual(true);
+  });
+
+  it('returns true for empty U8a inputs', (): void => {
+    expect(isUtf8(new Uint8Array())).toEqual(true);
+  });
+
+  it('returns false for empty undefined inputs', (): void => {
+    expect(isUtf8()).toEqual(false);
+  });
+
+  it('it is valid for ru', (): void => {
+    expect(isUtf8('Приветствую, ми')).toEqual(true);
+  });
+
+  it('is valid for zh', (): void => {
+    expect(isUtf8('你好')).toEqual(true);
+  });
+
+  it('is invalid for something random', (): void => {
+    expect(isUtf8('0x7f07b1f87709608bee603bbc79a0dfc29cd315c1351a83aa31adf7458d7d3003')).toEqual(false);
+    expect(isUtf8('0xc9ec51351beec59b52db06b3dd4685004013035df080358c319553ced597ca05')).toEqual(false);
+    expect(isUtf8('0xd12cef06e90a05b63737d542aaee1389ff9f5c25e461b362180f025c3b2d5635')).toEqual(false);
+  });
+});

packages/util/src/is/utf8.ts

@@ -0,0 +1,208 @@
+// Copyright 2017-2020 @polkadot/util authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+// Adapted from https://github.com/JulienPalard/is_utf8/blob/master/is_utf8.c
+
+import u8aToU8a from '../u8a/toU8a';
+import isString from './string';
+
+/**
+ * @name isUtf8
+ * @summary Tests if the input is valid Utf8
+ * @description
+ * Checks to see if the input string or Uint8Array is valid Utf8
+ */
+export default function isUtf8 (value?: number[] | Buffer | Uint8Array | string | null): boolean {
+  if (!value) {
+    return isString(value);
+  }
+
+  const u8a = u8aToU8a(value);
+  const len = u8a.length;
+  let i = 0;
+
+  while (i < len) {
+    if (u8a[i] <= 0x7F) /* 00..7F */ {
+      i += 1;
+    } else if (u8a[i] >= 0xC2 && u8a[i] <= 0xDF) /* C2..DF 80..BF */ {
+      if (i + 1 < len) /* Expect a 2nd byte */ {
+        if (u8a[i + 1] < 0x80 || u8a[i + 1] > 0xBF) {
+          // *message = "After a first byte between C2 and DF, expecting a 2nd byte between 80 and BF";
+          // *faulty_bytes = 2;
+          return false;
+        }
+      } else {
+        // *message = "After a first byte between C2 and DF, expecting a 2nd byte.";
+        // *faulty_bytes = 1;
+        return false;
+      }
+
+      i += 2;
+    } else if (u8a[i] === 0xE0) /* E0 A0..BF 80..BF */ {
+      if (i + 2 < len) /* Expect a 2nd and 3rd byte */ {
+        if (u8a[i + 1] < 0xA0 || u8a[i + 1] > 0xBF) {
+          // *message = "After a first byte of E0, expecting a 2nd byte between A0 and BF.";
+          // *faulty_bytes = 2;
+          return false;
+        }
+
+        if (u8a[i + 2] < 0x80 || u8a[i + 2] > 0xBF) {
+          // *message = "After a first byte of E0, expecting a 3nd byte between 80 and BF.";
+          // *faulty_bytes = 3;
+          return false;
+        }
+      } else {
+        // *message = "After a first byte of E0, expecting two following bytes.";
+        // *faulty_bytes = 1;
+        return false;
+      }
+
+      i += 3;
+    } else if (u8a[i] >= 0xE1 && u8a[i] <= 0xEC) /* E1..EC 80..BF 80..BF */ {
+      if (i + 2 < len) /* Expect a 2nd and 3rd byte */ {
+        if (u8a[i + 1] < 0x80 || u8a[i + 1] > 0xBF) {
+          // *message = "After a first byte between E1 and EC, expecting the 2nd byte between 80 and BF.";
+          // *faulty_bytes = 2;
+          return false;
+        }
+
+        if (u8a[i + 2] < 0x80 || u8a[i + 2] > 0xBF) {
+          // *message = "After a first byte between E1 and EC, expecting the 3rd byte between 80 and BF.";
+          // *faulty_bytes = 3;
+          return false;
+        }
+      } else {
+        // *message = "After a first byte between E1 and EC, expecting two following bytes.";
+        // *faulty_bytes = 1;
+        return false;
+      }
+
+      i += 3;
+    } else if (u8a[i] === 0xED) /* ED 80..9F 80..BF */ {
+      if (i + 2 < len) /* Expect a 2nd and 3rd byte */ {
+        if (u8a[i + 1] < 0x80 || u8a[i + 1] > 0x9F) {
+          // *message = "After a first byte of ED, expecting 2nd byte between 80 and 9F.";
+          // *faulty_bytes = 2;
+          return false;
+        }
+
+        if (u8a[i + 2] < 0x80 || u8a[i + 2] > 0xBF) {
+          // *message = "After a first byte of ED, expecting 3rd byte between 80 and BF.";
+          // *faulty_bytes = 3;
+          return false;
+        }
+      } else {
+        // *message = "After a first byte of ED, expecting two following bytes.";
+        // *faulty_bytes = 1;
+        return false;
+      }
+
+      i += 3;
+    } else if (u8a[i] >= 0xEE && u8a[i] <= 0xEF) /* EE..EF 80..BF 80..BF */ {
+      if (i + 2 < len) /* Expect a 2nd and 3rd byte */ {
+        if (u8a[i + 1] < 0x80 || u8a[i + 1] > 0xBF) {
+          // *message = "After a first byte between EE and EF, expecting 2nd byte between 80 and BF.";
+          // *faulty_bytes = 2;
+          return false;
+        }
+
+        if (u8a[i + 2] < 0x80 || u8a[i + 2] > 0xBF) {
+          // *message = "After a first byte between EE and EF, expecting 3rd byte between 80 and BF.";
+          // *faulty_bytes = 3;
+          return false;
+        }
+      } else {
+        // *message = "After a first byte between EE and EF, two following bytes.";
+        // *faulty_bytes = 1;
+        return false;
+      }
+
+      i += 3;
+    } else if (u8a[i] === 0xF0) /* F0 90..BF 80..BF 80..BF */ {
+      if (i + 3 < len) /* Expect a 2nd, 3rd 3th byte */ {
+        if (u8a[i + 1] < 0x90 || u8a[i + 1] > 0xBF) {
+          // *message = "After a first byte of F0, expecting 2nd byte between 90 and BF.";
+          // *faulty_bytes = 2;
+          return false;
+        }
+
+        if (u8a[i + 2] < 0x80 || u8a[i + 2] > 0xBF) {
+          // *message = "After a first byte of F0, expecting 3rd byte between 80 and BF.";
+          // *faulty_bytes = 3;
+          return false;
+        }
+
+        if (u8a[i + 3] < 0x80 || u8a[i + 3] > 0xBF) {
+          // *message = "After a first byte of F0, expecting 4th byte between 80 and BF.";
+          // *faulty_bytes = 4;
+          return false;
+        }
+      } else {
+        // *message = "After a first byte of F0, expecting three following bytes.";
+        // *faulty_bytes = 1;
+        return false;
+      }
+
+      i += 4;
+    } else if (u8a[i] >= 0xF1 && u8a[i] <= 0xF3) /* F1..F3 80..BF 80..BF 80..BF */ {
+      if (i + 3 < len) /* Expect a 2nd, 3rd 3th byte */ {
+        if (u8a[i + 1] < 0x80 || u8a[i + 1] > 0xBF) {
+          // *message = "After a first byte of F1, F2, or F3, expecting a 2nd byte between 80 and BF.";
+          // *faulty_bytes = 2;
+          return false;
+        }
+
+        if (u8a[i + 2] < 0x80 || u8a[i + 2] > 0xBF) {
+          // *message = "After a first byte of F1, F2, or F3, expecting a 3rd byte between 80 and BF.";
+          // *faulty_bytes = 3;
+          return false;
+        }
+
+        if (u8a[i + 3] < 0x80 || u8a[i + 3] > 0xBF) {
+          // *message = "After a first byte of F1, F2, or F3, expecting a 4th byte between 80 and BF.";
+          // *faulty_bytes = 4;
+          return false;
+        }
+      } else {
+        // *message = "After a first byte of F1, F2, or F3, expecting three following bytes.";
+        // *faulty_bytes = 1;
+        return false;
+      }
+
+      i += 4;
+    } else if (u8a[i] === 0xF4) /* F4 80..8F 80..BF 80..BF */ {
+      if (i + 3 < len) /* Expect a 2nd, 3rd 3th byte */ {
+        if (u8a[i + 1] < 0x80 || u8a[i + 1] > 0x8F) {
+          // *message = "After a first byte of F4, expecting 2nd byte between 80 and 8F.";
+          // *faulty_bytes = 2;
+          return false;
+        }
+
+        if (u8a[i + 2] < 0x80 || u8a[i + 2] > 0xBF) {
+          // *message = "After a first byte of F4, expecting 3rd byte between 80 and BF.";
+          // *faulty_bytes = 3;
+          return false;
+        }
+
+        if (u8a[i + 3] < 0x80 || u8a[i + 3] > 0xBF) {
+          // *message = "After a first byte of F4, expecting 4th byte between 80 and BF.";
+          // *faulty_bytes = 4;
+          return false;
+        }
+      } else {
+        // *message = "After a first byte of F4, expecting three following bytes.";
+        // *faulty_bytes = 1;
+        return false;
+      }
+
+      i += 4;
+    } else {
+      // *message = "Expecting bytes in the following ranges: 00..7F C2..F4.";
+      // *faulty_bytes = 1;
+      return false;
+    }
+  }
+
+  return true;
+}

packages/util/src/number/toU8a.spec.ts

@@ -5,12 +5,6 @@
 import { numberToU8a } from '.';
 
 describe('numberToU8a', (): void => {
-  it('converts 0 to empty', (): void => {
-    expect(
-      numberToU8a(0)
-    ).toEqual(new Uint8Array());
-  });
-
   it('converts undefined to empty', (): void => {
     expect(
       numberToU8a()
@@ -29,6 +23,18 @@ describe('numberToU8a', (): void => {
     ).toEqual(new Uint8Array());
   });
 
+  it('converts 0 to u8a', (): void => {
+    expect(
+      numberToU8a(0)
+    ).toEqual(new Uint8Array([0]));
+  });
+
+  it('converts 0 to u8a (with length)', (): void => {
+    expect(
+      numberToU8a(0, 16)
+    ).toEqual(new Uint8Array([0, 0]));
+  });
+
   it('converts values to the u8a', (): void => {
     expect(
       numberToU8a(0x3456)

packages/util/src/number/toU8a.ts

@@ -3,6 +3,8 @@
 // of the Apache-2.0 license. See the LICENSE file for details.
 
 import hexToU8a from '../hex/toU8a';
+import isNull from '../is/null';
+import isUndefined from '../is/undefined';
 import numberToHex from './toHex';
 
 /**
@@ -20,7 +22,7 @@ import numberToHex from './toHex';
  * ```
  */
 export default function numberToU8a (value?: number | null, bitLength = -1): Uint8Array {
-  if (!value || isNaN(value)) {
+  if (isUndefined(value) || isNull(value) || isNaN(value)) {
     return new Uint8Array();
   }
 

packages/util/src/polyfill/textDecoder.spec.ts

@@ -26,7 +26,7 @@ describe('TextDecoder', (): void => {
   });
 
   it('polyfills with no exceptions (with TextDecoder)', (): void => {
-    // eslint-disable-next-line @typescript-eslint/no-explicit-any,@typescript-eslint/no-unsafe-assignment,@typescript-eslint/no-unsafe-member-access
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any,@typescript-eslint/no-var-requires,@typescript-eslint/no-unsafe-assignment,@typescript-eslint/no-unsafe-member-access
     (global as any).TextDecoder = require('util').TextDecoder;
 
     // eslint-disable-next-line @typescript-eslint/no-var-requires

packages/util/src/polyfill/textEncoder.spec.ts

@@ -26,7 +26,7 @@ describe('TextEncoder', (): void => {
   });
 
   it('polyfills with no exceptions (with TextEncoder)', (): void => {
-    // eslint-disable-next-line @typescript-eslint/no-explicit-any,@typescript-eslint/no-unsafe-assignment,@typescript-eslint/no-unsafe-member-access
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any,@typescript-eslint/no-var-requires,@typescript-eslint/no-unsafe-assignment,@typescript-eslint/no-unsafe-member-access
     (global as any).TextEncoder = require('util').TextEncoder;
 
     // eslint-disable-next-line @typescript-eslint/no-var-requires

packages/util/src/types.ts

@@ -40,3 +40,11 @@ export type BnList = {
   0: BN;
   1: BN;
 } & BN[];
+
+export interface Time {
+  days: number;
+  hours: number;
+  minutes: number;
+  seconds: number;
+  milliseconds: number;
+}