@pharosnames/address-encoder/src/coin/icx.ts

Encodes and decodes address formats for various cryptocurrencies with Pharos network support

import { concatBytes } from "@noble/hashes/utils";
import type { CheckedCoin } from "../types.js";
import {
  bytesToHexWithoutPrefix,
  hexWithoutPrefixToBytes,
} from "../utils/bytes.js";

const name = "icx";
const coinType = 74;

export const encodeIcxAddress = (source: Uint8Array): string => {
  if (source.length !== 21) throw new Error("Invalid address length");

  const type = source[0];
  if (type === 0x00) return `hx${bytesToHexWithoutPrefix(source.slice(1))}`;
  if (type === 0x01) return `cx${bytesToHexWithoutPrefix(source.slice(1))}`;
  throw new Error("Invalid address type");
};
export const decodeIcxAddress = (source: string): Uint8Array => {
  const prefix = source.slice(0, 2);
  const body = source.slice(2);
  if (prefix === "hx")
    return concatBytes(new Uint8Array([0x00]), hexWithoutPrefixToBytes(body));
  if (prefix === "cx")
    return concatBytes(new Uint8Array([0x01]), hexWithoutPrefixToBytes(body));
  throw new Error("Invalid address prefix");
};

export const icx = {
  name,
  coinType,
  encode: encodeIcxAddress,
  decode: decodeIcxAddress,
} as const satisfies CheckedCoin;