paritytech/product-sdk/product-sdk-utilities

import {
  isValidSs58,
  ss58Decode,
  ss58Encode,
  normalizeSs58,
  ss58ToH160,
  h160ToSs58,
  truncateAddress,
} from "@parity/product-sdk-address";
isValidSs58("5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY"); // true
const { publicKey, prefix } = ss58Decode("5GrwvaEF...");
const polkadotAddr = normalizeSs58("5GrwvaEF...", 0);
const evmAddr = ss58ToH160("5GrwvaEF...");
truncateAddress("5GrwvaEF..."); // "5Grwva...utQY"

import {
  xchachaEncrypt,
  xchachaDecrypt,
  deriveKey,
  randomBytes,
  sealedBoxEncrypt,
  sealedBoxDecrypt,
} from "@parity/product-sdk-crypto";
const key = randomBytes(32);
const { ciphertext, nonce } = xchachaEncrypt(data, key);
const plaintext = xchachaDecrypt(ciphertext, key, nonce);
const encKey = deriveKey(masterSecret, "myapp-v1", "encryption");

import { bytesToHex, hexToBytes, utf8ToBytes, concatBytes } from "@parity/product-sdk-utils";
import { blake2b256, sha256, keccak256 } from "@parity/product-sdk-utils";
import { formatPlanck, parseToPlanck, formatBalance } from "@parity/product-sdk-utils";
const hex = bytesToHex(new Uint8Array([0xab, 0xcd]));
const hash = blake2b256(new TextEncoder().encode("hello"));
formatPlanck(10_000_000_000n);   // "1.0" (DOT)
parseToPlanck("1.5");             // 15_000_000_000n
formatBalance(10_000_000_000_000n, { symbol: "DOT" }); // "1,000 DOT"

import { createLocalKvStore } from "@parity/product-sdk-local-storage";
const store = await createLocalKvStore({ prefix: "myapp" });
await store.set("theme", "dark");
const theme = await store.get("theme");
await store.setJSON("prefs", { lang: "en" });
const prefs = await store.getJSON<{ lang: string }>("prefs");

import { createLogger, configure } from "@parity/product-sdk-logger";
const log = createLogger("my-feature");
log.error("Connection failed", { url, status });
log.info("Connected");
log.debug("Payload received", payload);
configure({ level: "debug", namespaces: ["my-feature"] });