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import { asContentAddressedChunk, Chunk } from '../chunk/cac'
import {
makeSingleOwnerChunkFromData,
uploadSingleOwnerChunkData,
uploadSingleOwnerChunkWithWrappedChunk,
} from '../chunk/soc'
import * as bytes from '../modules/bytes'
import * as chunkAPI from '../modules/chunk'
import {
FeedPayloadResult,
FeedReferenceResult,
FeedUpdateOptions,
fetchLatestFeedUpdate,
probeFeed,
} from '../modules/feed'
import { BeeRequestOptions, FeedReader, FeedWriter, UploadOptions, UploadResult } from '../types'
import { Bytes } from '../utils/bytes'
import { BeeResponseError } from '../utils/error'
import { ResourceLocator } from '../utils/resource-locator'
import {
BatchId,
EthAddress,
FeedIndex,
Identifier,
PrivateKey,
Reference,
Signature,
Topic,
} from '../utils/typed-bytes'
import { makeFeedIdentifier } from './identifier'
const TIMESTAMP_PAYLOAD_OFFSET = 0
const TIMESTAMP_PAYLOAD_SIZE = 8
const REFERENCE_PAYLOAD_OFFSET = TIMESTAMP_PAYLOAD_SIZE
export interface Epoch {
time: number
level: number
}
export interface FeedUploadOptions extends UploadOptions, FeedUpdateOptions {}
export interface FeedUpdate {
timestamp: Optional<number>
payload: Bytes
}
export async function findNextIndex(
requestOptions: BeeRequestOptions,
owner: EthAddress,
topic: Topic,
): Promise<FeedIndex> {
try {
const feedUpdate = await fetchLatestFeedUpdate(requestOptions, owner, topic)
Iif (!feedUpdate.feedIndexNext) {
throw Error('Feed index next is not defined. This should happen when fetching an exact index.')
}
return feedUpdate.feedIndexNext
} catch (e) {
if (e instanceof BeeResponseError) {
return FeedIndex.fromBigInt(0n)
}
throw e
}
}
export async function updateFeedWithReference(
requestOptions: BeeRequestOptions,
signer: PrivateKey,
topic: Topic,
reference: Reference | string | Uint8Array,
postageBatchId: BatchId,
options?: FeedUploadOptions,
): Promise<UploadResult> {
reference = new Reference(reference)
const nextIndex = options?.index ?? (await findNextIndex(requestOptions, signer.publicKey().address(), topic))
const identifier = makeFeedIdentifier(topic, nextIndex)
const at = options?.at ?? Date.now() / 1000.0
const timestamp = Binary.numberToUint64(BigInt(Math.floor(at)), 'BE')
const payloadBytes = Binary.concatBytes(timestamp, reference.toUint8Array())
return uploadSingleOwnerChunkData(requestOptions, signer, postageBatchId, identifier, payloadBytes, options)
}
export async function updateFeedWithPayload(
requestOptions: BeeRequestOptions,
signer: PrivateKey,
topic: Topic,
data: Uint8Array | string,
postageBatchId: BatchId,
options?: FeedUploadOptions,
): Promise<UploadResult> {
const nextIndex = options?.index ?? (await findNextIndex(requestOptions, signer.publicKey().address(), topic))
const identifier = makeFeedIdentifier(topic, nextIndex)
if (data.length > 4096) {
const uploadResult = await bytes.upload(requestOptions, data, postageBatchId, options)
const rootChunk = await chunkAPI.download(requestOptions, uploadResult.reference)
return uploadSingleOwnerChunkWithWrappedChunk(
requestOptions,
signer,
postageBatchId,
identifier,
rootChunk,
options,
)
}
return uploadSingleOwnerChunkData(
requestOptions,
signer,
postageBatchId,
identifier,
Types.isString(data) ? Bytes.fromUtf8(data).toUint8Array() : data,
options,
)
}
export function getFeedUpdateChunkReference(owner: EthAddress, topic: Topic, index: FeedIndex): Reference {
const identifier = makeFeedIdentifier(topic, index)
return new Reference(Binary.keccak256(Binary.concatBytes(identifier.toUint8Array(), owner.toUint8Array())))
}
export async function downloadFeedUpdate(
requestOptions: BeeRequestOptions,
owner: EthAddress,
topic: Topic,
index: FeedIndex | number,
hasTimestamp = false,
): Promise<FeedUpdate> {
index = typeof index === 'number' ? FeedIndex.fromBigInt(BigInt(index)) : index
const address = getFeedUpdateChunkReference(owner, topic, index)
const data = await chunkAPI.download(requestOptions, address.toHex())
const soc = makeSingleOwnerChunkFromData(data, address)
let timestamp: Optional<number> = Optional.empty()
if (hasTimestamp) {
const timestampBytes = Bytes.fromSlice(soc.payload.toUint8Array(), TIMESTAMP_PAYLOAD_OFFSET, TIMESTAMP_PAYLOAD_SIZE)
timestamp = Optional.of(Number(Binary.uint64ToNumber(timestampBytes.toUint8Array(), 'BE')))
}
return {
timestamp,
payload: new Bytes(soc.payload.offset(hasTimestamp ? REFERENCE_PAYLOAD_OFFSET : 0)),
}
}
export async function downloadFeedUpdateAsCAC(
requestOptions: BeeRequestOptions,
owner: EthAddress,
topic: Topic,
index: FeedIndex | number,
): Promise<Chunk> {
index = typeof index === 'number' ? FeedIndex.fromBigInt(BigInt(index)) : index
const address = getFeedUpdateChunkReference(owner, topic, index)
const data = await chunkAPI.download(requestOptions, address)
return asContentAddressedChunk(data.slice(Identifier.LENGTH + Signature.LENGTH))
}
export function makeFeedReader(requestOptions: BeeRequestOptions, topic: Topic, owner: EthAddress): FeedReader {
// TODO: remove after enough time has passed in deprecated version
const download = async (options?: FeedUpdateOptions): Promise<FeedPayloadResult> => {
if (options?.index === undefined) {
return fetchLatestFeedUpdate(requestOptions, owner, topic)
}
const update = await downloadFeedUpdate(requestOptions, owner, topic, options.index, options.hasTimestamp ?? true)
const feedIndex = typeof options.index === 'number' ? FeedIndex.fromBigInt(BigInt(options.index)) : options.index
return {
payload: update.payload,
feedIndex,
feedIndexNext: feedIndex.next(),
}
}
const downloadPayload = async (options?: FeedUpdateOptions): Promise<FeedPayloadResult> => {
if (options?.index === undefined) {
return fetchLatestFeedUpdate(requestOptions, owner, topic)
}
const cac = await downloadFeedUpdateAsCAC(requestOptions, owner, topic, options.index)
const payload =
cac.span.toBigInt() <= 4096n
? cac.payload
: await bytes.download(requestOptions, new ResourceLocator(cac.address))
const feedIndex = typeof options.index === 'number' ? FeedIndex.fromBigInt(BigInt(options.index)) : options.index
return {
payload,
feedIndex,
feedIndexNext: feedIndex.next(),
}
}
const downloadReference = async (options?: FeedUpdateOptions): Promise<FeedReferenceResult> => {
let index = options?.index
if (index === undefined) {
index = (await probeFeed(requestOptions, owner, topic)).feedIndex
}
const payload = await download({ ...options, index: index })
return {
reference: new Reference(payload.payload.toUint8Array()),
feedIndex: payload.feedIndex,
feedIndexNext: payload.feedIndexNext ?? payload.feedIndex.next(),
}
}
return {
download,
downloadPayload,
downloadReference,
owner,
topic,
}
}
export function makeFeedWriter(requestOptions: BeeRequestOptions, topic: Topic, signer: PrivateKey): FeedWriter {
const upload = async (
postageBatchId: BatchId,
reference: Reference | string | Uint8Array,
options?: FeedUploadOptions,
) => {
return updateFeedWithReference(requestOptions, signer, topic, reference, postageBatchId, options)
}
const uploadPayload = async (postageBatchId: BatchId, data: Uint8Array | string, options?: FeedUploadOptions) => {
return updateFeedWithPayload(requestOptions, signer, topic, data, postageBatchId, options)
}
return {
...makeFeedReader(requestOptions, topic, signer.publicKey().address()),
upload,
uploadReference: upload,
uploadPayload,
}
}
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