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• [DIR] ..
• [FILE] address.d.ts
• [FILE] address.js
• [FILE] base58check.d.ts
• [FILE] base58check.js
• [FILE] checksum.d.ts
• [FILE] checksum.js
• [FILE] encoding.d.ts
• [FILE] encoding.js
• [FILE] index.d.ts
• [FILE] index.js

Просмотр файла: base58check.js

/*
 * From https://github.com/wzbg/base58check
 * @Author: zyc
 * @Date:   2016-09-11 23:36:05
 */
'use strict';
Object.defineProperty(exports, "__esModule", { value: true });
exports.decode = exports.encode = void 0;
var buffer_1 = require("buffer/");
var cross_sha256_1 = require("cross-sha256");
var basex = require("base-x");
var ALPHABET = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz';
function encode(data, prefix, encoding) {
    if (prefix === void 0) { prefix = '00'; }
    if (encoding === void 0) { encoding = 'hex'; }
    if (typeof data === 'string') {
        data = new buffer_1.Buffer(data, encoding);
    }
    if (!(data instanceof buffer_1.Buffer)) {
        throw new TypeError('"data" argument must be an Array of Buffers');
    }
    if (!(prefix instanceof buffer_1.Buffer)) {
        prefix = new buffer_1.Buffer(prefix, encoding);
    }
    var hash = buffer_1.Buffer.concat([prefix, data]);
    hash = cross_sha256_1.hashSha256(hash);
    hash = cross_sha256_1.hashSha256(hash);
    hash = buffer_1.Buffer.concat([prefix, data, hash.slice(0, 4)]);
    return basex(ALPHABET).encode(hash);
}
exports.encode = encode;
function decode(string, encoding) {
    var buffer = new buffer_1.Buffer(basex(ALPHABET).decode(string));
    var prefix = buffer.slice(0, 1);
    var data = buffer.slice(1, -4);
    var hash = buffer_1.Buffer.concat([prefix, data]);
    hash = cross_sha256_1.hashSha256(hash);
    hash = cross_sha256_1.hashSha256(hash);
    buffer.slice(-4).forEach(function (check, index) {
        if (check !== hash[index]) {
            throw new Error('Invalid checksum');
        }
    });
    if (encoding) {
        prefix = prefix.toString(encoding);
        data = data.toString(encoding);
    }
    return { prefix: prefix, data: data };
}
exports.decode = decode;

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