57 lines
2.2 KiB
JavaScript
57 lines
2.2 KiB
JavaScript
"use strict";
|
|
Object.defineProperty(exports, "__esModule", { value: true });
|
|
exports.assertValidChunkData = exports.isValidChunkData = exports.makeContentAddressedChunk = exports.MAX_PAYLOAD_SIZE = exports.MIN_PAYLOAD_SIZE = void 0;
|
|
const error_1 = require("../utils/error");
|
|
const bmt_1 = require("./bmt");
|
|
const bytes_1 = require("../utils/bytes");
|
|
const serialize_1 = require("./serialize");
|
|
const span_1 = require("./span");
|
|
exports.MIN_PAYLOAD_SIZE = 1;
|
|
exports.MAX_PAYLOAD_SIZE = 4096;
|
|
const CAC_SPAN_OFFSET = 0;
|
|
const CAC_PAYLOAD_OFFSET = CAC_SPAN_OFFSET + span_1.SPAN_SIZE;
|
|
/**
|
|
* Creates a content addressed chunk and verifies the payload size.
|
|
*
|
|
* @param payloadBytes the data to be stored in the chunk
|
|
*/
|
|
function makeContentAddressedChunk(payloadBytes) {
|
|
const span = (0, span_1.makeSpan)(payloadBytes.length);
|
|
(0, bytes_1.assertFlexBytes)(payloadBytes, exports.MIN_PAYLOAD_SIZE, exports.MAX_PAYLOAD_SIZE);
|
|
const data = (0, serialize_1.serializeBytes)(span, payloadBytes);
|
|
return {
|
|
data,
|
|
span: () => span,
|
|
payload: () => (0, bytes_1.flexBytesAtOffset)(data, CAC_PAYLOAD_OFFSET, exports.MIN_PAYLOAD_SIZE, exports.MAX_PAYLOAD_SIZE),
|
|
address: () => (0, bmt_1.bmtHash)(data),
|
|
};
|
|
}
|
|
exports.makeContentAddressedChunk = makeContentAddressedChunk;
|
|
/**
|
|
* Type guard for valid content addressed chunk data
|
|
*
|
|
* @param data The chunk data
|
|
* @param chunkAddress The address of the chunk
|
|
*/
|
|
function isValidChunkData(data, chunkAddress) {
|
|
if (!(data instanceof Uint8Array))
|
|
return false;
|
|
const address = (0, bmt_1.bmtHash)(data);
|
|
return (0, bytes_1.bytesEqual)(address, chunkAddress);
|
|
}
|
|
exports.isValidChunkData = isValidChunkData;
|
|
/**
|
|
* Asserts if data are representing given address of its chunk.
|
|
*
|
|
* @param data The chunk data
|
|
* @param chunkAddress The address of the chunk
|
|
*
|
|
* @returns a valid content addressed chunk or throws error
|
|
*/
|
|
function assertValidChunkData(data, chunkAddress) {
|
|
if (!isValidChunkData(data, chunkAddress)) {
|
|
throw new error_1.BeeError('Address of content address chunk does not match given data!');
|
|
}
|
|
}
|
|
exports.assertValidChunkData = assertValidChunkData;
|