@dioxide-js/silas/dist/esm/utils/validator.mjs

RPC utility for Silas

import base32Decode from '../_virtual/index.mjs';
import base32Encode from '../_virtual/index2.mjs';
import crc32c from '../_virtual/crc32c.mjs';
import { concat } from './buffer.mjs';

function validCRC(publicKey, alg) {
    let code = 0;
    switch (alg === null || alg === void 0 ? void 0 : alg.toLowerCase()) {
        case 'ed25519':
            code = 0x3;
            break;
        case 'sm2':
            code = 0x4;
            break;
        default:
            throw 'Valid CRC failed, unsupported alg: ' + alg;
    }
    let errorCorrectingCode = crc32c.buf(publicKey, code);
    errorCorrectingCode = (errorCorrectingCode & 0xfffffff0) | code;
    errorCorrectingCode = errorCorrectingCode >>> 0;
    return errorCorrectingCode;
}
function isValidAddress(addr) {
    try {
        const [addressStr, alg] = addr.split(':');
        if (!addressStr || !alg) {
            return false;
        }
        const address = new Uint8Array(base32Decode(addressStr, 'Crockford'));
        const publicKey = address.slice(0, 32);
        const errorCorrectingCode = validCRC(publicKey, alg);
        const buffer = new Int32Array([errorCorrectingCode]).buffer;
        const errorCorrectingCodeBuffer = new Uint8Array(buffer);
        const mergedBuffer = concat(publicKey, errorCorrectingCodeBuffer);
        const encodedMergeBuffer = base32Encode(mergedBuffer, 'Crockford');
        return encodedMergeBuffer === addressStr.toUpperCase();
    }
    catch (error) {
        console.error('Exception ' + error);
        return false;
    }
}

export { isValidAddress, validCRC };
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