antelope-ecc/keys/validate_public_key.js

A universal JavaScript ECC digital signature and key utility package for Antelope based blockchains.

// @ts-check
import base58_to_binary from "base58-js/base58_to_binary";
import ripemd160 from "ripemd160-js/ripemd160.js";
/**
 * Validate Antelope public key.
 * @name validate_public_key
 * @kind function
 * @param {String} wif_public_key wallet import format Antelope public key.
 * @returns {Promise<Boolean>} Returns true if valid
 */
export default async function validate_public_key(wif_public_key) {
    let key_type;
    const key_code = [
        [75, 49],
        [82, 49],
        [87, 65],
    ];
    if (wif_public_key.startsWith("PUB_K1_"))
        key_type = 0;
    else if (wif_public_key.startsWith("PUB_R1_"))
        key_type = 1;
    else if (wif_public_key.startsWith("PUB_WA_"))
        key_type = 2;
    else
        throw new Error("Public keys need to start with PUB_K1, PUB_R1 or PUB_WA.");
    let public_key = wif_public_key
        .replace("PUB_K1_", "")
        .replace("PUB_R1_", "")
        .replace("PUB_WA_", "");
    const base58_str = base58_to_binary(public_key);
    const checksum_check = base58_str.slice(-4);
    const checksum = await ripemd160(Uint8Array.from([...base58_str.slice(0, -4), ...key_code[key_type]]));
    for (let i = 0; i < 4; i++)
        if (checksum[i] !== checksum_check[i])
            throw new Error("Invalid checksum");
    return true;
}