@polkadot/util-crypto/address/check.js

A collection of useful crypto utilities for @polkadot

import { base58Decode } from '../base58/index.js';
import { checkAddressChecksum } from './checksum.js';
import { defaults } from './defaults.js';
/**
 * @name checkAddress
 * @summary Validates an ss58 address.
 * @description
 * From the provided input, validate that the address is a valid input.
 */
export function checkAddress(address, prefix) {
    let decoded;
    try {
        decoded = base58Decode(address);
    }
    catch (error) {
        return [false, error.message];
    }
    const [isValid, , , ss58Decoded] = checkAddressChecksum(decoded);
    if (ss58Decoded !== prefix) {
        return [false, `Prefix mismatch, expected ${prefix}, found ${ss58Decoded}`];
    }
    else if (!defaults.allowedEncodedLengths.includes(decoded.length)) {
        return [false, 'Invalid decoded address length'];
    }
    return [isValid, isValid ? null : 'Invalid decoded address checksum'];
}