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