@airgap/serializer/v2/payloads/chunked-payload.js

The @airgap/serializer provides serializers used in AirGap applications.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.ChunkedPayload = void 0;
var errors_1 = require("@airgap/coinlib-core/errors");
function isBufferArray(arg) {
    return Array.isArray(arg) && arg.every(function (el) { return el instanceof Buffer; });
}
function isDecodedChunkedPayload(arg) {
    // TODO: How can we detect if the interface changed?
    if (!isObject(arg)) {
        return false;
    }
    if (arg.currentPage === undefined || arg.total === undefined || arg.payload === undefined) {
        return false;
    }
    return true;
}
function isObject(arg) {
    return typeof arg === 'object';
}
function getIntFromBuffer(buffer) {
    return parseInt(buffer.toString(), 10);
}
var ChunkedPayload = /** @class */ (function () {
    function ChunkedPayload(currentPage, total, buffer) {
        this.currentPage = currentPage;
        this.total = total;
        this.buffer = buffer;
    }
    ChunkedPayload.fromDecoded = function (object) {
        if (!isDecodedChunkedPayload(object)) {
            throw new errors_1.SerializerError(errors_1.SerializerErrorType.UNEXPECTED_PAYLOAD, "Object does not match \"Chunked serializer\" interface");
        }
        return new ChunkedPayload(object.currentPage, object.total, object.payload);
    };
    ChunkedPayload.fromEncoded = function (buf) {
        if (!isBufferArray(buf)) {
            throw new errors_1.SerializerError(errors_1.SerializerErrorType.UNEXPECTED_PAYLOAD, "Input value is not a buffer array");
        }
        if (buf.length !== 3) {
            throw new errors_1.SerializerError(errors_1.SerializerErrorType.UNEXPECTED_PAYLOAD, "Input value does not have the right length");
        }
        // We know here that the buffer has the following signature
        // [currentPage, totalPages, payload]: [Buffer, Buffer, Buffer]
        var currentPage = getIntFromBuffer(buf[0]);
        var total = getIntFromBuffer(buf[1]);
        var payload = buf[2];
        return new ChunkedPayload(currentPage, total, payload);
    };
    ChunkedPayload.prototype.asArray = function () {
        return [this.currentPage.toString(), this.total.toString(), this.buffer];
    };
    return ChunkedPayload;
}());
exports.ChunkedPayload = ChunkedPayload;
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