@avalanche-sdk/client/src/accounts/utils/publicKeyToXPAddress.ts

A TypeScript SDK for interacting with the Avalanche network through JSON-RPC APIs. This SDK provides a comprehensive set of tools to interact with all Avalanche chains (P-Chain, X-Chain, C-Chain) and various APIs, including wallet functionality for transa

import { secp256k1, utils } from "@avalabs/avalanchejs";
import { ProjectivePoint as Point } from "@noble/secp256k1";
import { XPAddress } from "../avalancheAccount.js";

/**
 * Converts a public key to an XP address.
 *
 * @param publicKey - The public key to convert.
 * @param hrp - The human readable prefix to use for the address.
 * @returns The XP address as a `0x` prefixed string.
 *
 * @example
 * ```ts
 * import { publicKeyToXPAddress } from "@avalanche-sdk/client/accounts";
 *
 * const address = publicKeyToXPAddress("0xab....", "avax");
 * console.log(address);
 * ```
 */
export function publicKeyToXPAddress(
  publicKey: string,
  hrp: string
): XPAddress {
  const point = Point.fromHex(utils.strip0x(publicKey));
  const compressedPubKey = new Uint8Array(point.toRawBytes(true));

  const address = secp256k1.publicKeyBytesToAddress(compressedPubKey);
  return utils.formatBech32(hrp, address) as XPAddress;
}