File Operations SDK Methods

In this section, we will learn about all the available File Operations methods provided by the SDK.

Prerequisites

Initialize the SDK before using wallet methods. See the Quick Start Guide for details.
All methods require a wallet. Refer to createWallet for more information.
All methods require a domain parameter, which is the network domain where your wallet and providers such as blobbers, sharders, miners, and validators are deployed. GoSDK will send requests to this domain.

File Operations Methods

The file operation methods allow you to perform various operations on files.

`getLookupHash`

Retrieves the lookup hash for a specific file path in an allocation. The lookup hash is used to uniquely identify a file in the allocation.

Parameters

Name	Type	Description
`domain`	`NetworkDomain`	Network domain for the allocation
`allocationId`	`string`	Allocation ID to check
`filePath`	`string`	Path of the file in the allocation
`wallet`	`ActiveWallet`	Active Wallet details

Return Type

Promise<string>

Example

import { getLookupHash } from '@zerochain/sdk'

const lookupHash = await getLookupHash({
  domain: 'mainnet.zus.network',
  wallet: activeWallet
  allocationId: '8695f8af52cdfc1e66d879407a5278703579d31de7ce0e2cf1707fdec9cc14c3',
  filePath: '/my-folder/my-file.txt',
})

`createDir`

Creates a directory on blobbers at the specified remote path.

Parameters

Name	Type	Description
`domain`	`NetworkDomain`	Network domain for the allocation
`wallet`	`ActiveWallet`	Active Wallet details
`allocationId`	`string`	Allocation ID where the directory will be created
`remotePath`	`string`	The remote path where the directory will be created

Example

import { createDir } from '@zerochain/sdk'

await createDir({
  domain: 'mainnet.zus.network',
  wallet: activeWallet,
  allocationId: '8695f8af52cdfc1e66d879407a5278703579d31de7ce0e2cf1707fdec9cc14c3',
  remotePath: '/my-folder/new-directory'
})

`setUploadMode`

Sets the upload mode to modify the upload speed and CPU usage. The upload mode determines the trade-off between upload speed and resource consumption.

Parameters

Name	Type	Description	Default value
`domain`	`NetworkDomain`	Network domain for the upload
`wallet`	`ActiveWallet`	Active Wallet details
`mode`	`0 \| 1 \| 2`	Upload mode: - `0`: Low (slow uploads, consumes less CPU & memory) - `1`: Medium (default) - `2`: High (high-speed uploads, consumes more CPU & memory)	`1`

Example

import { setUploadMode } from '@zerochain/sdk'

await setUploadMode({
  domain: 'mainnet.zus.network',
  wallet: activeWallet,
  mode: 2 // High speed uploads, but will consume more CPU & memory
})

`multiUpload`

Uploads multiple files in a batch. Files within a batch are uploaded in parallel. A single batch can handle up to 50 files at once. If you need to upload more than 50 files, the GoSDK will automatically create and manage multiple batches for you.

This method also supports resuming a paused upload. To resume, use the exact same bulkUploadOptions parameters that were initially used to start the upload. Only these original parameters should be provided when resuming the operation.

warning

Always ensure you do not exceed the batch size limit of 50 files. This is strongly advised because, in an upcoming GoSDK versions, the methods like cancelUpload and pauseUpload will rely on the batchId of the 50-file batch to perform their operations.
Only one batch upload can be in progress at a time.

Parameters

Name	Type	Description
`domain`	`NetworkDomain`	Network domain for the upload
`wallet`	`ActiveWallet`	Active Wallet details
`bulkUploadOptions`	`BulkUploadOption[]`	Array of upload options for each file

BulkUploadOption Type

type BulkUploadOption = {
  allocationId: string
  webstreaming: boolean
  isUpdate: boolean
  isRepair: boolean
  /** Number of blocks to upload per request */
  numBlocks: number
  file: File
  remotePath: string
  /** Whether to encrypt the file */
  encrypt: boolean
  thumbnailBytes: number[]
  /** Callback function will be invoked with progress updates */
  callback?: (
    totalBytes: number,
    completedBytes: number,
    fileName: string,
    blobURL: string,
    error: string
  ) => void
}

Callback Parameters

Name	Type	Description
`totalBytes`	`number`	Total bytes to upload
`completedBytes`	`number`	Bytes uploaded so far
`fileName`	`string`	Name of the file being uploaded
`blobURL`	`string`	URL of the blobber being used for upload
`error`	`string`	Error message, if any

Return Type

Promise<{ success?: boolean; error?: string }>

Example

import { multiUpload } from '@zerochain/sdk'

const result = await multiUpload({
  domain: 'mainnet.zus.network',
  wallet: activeWallet,
  bulkUploadOptions: [
    {
      allocationId: '8695f8af52cdfc1e66d879407a5278703579d31de7ce0e2cf1707fdec9cc14c3',
      webstreaming: false,
      isUpdate: false,
      isRepair: false,
      numBlocks: 100,
      file: new File(['file content'], 'file1.txt'),
      remotePath: '/my-folder/file1.txt',
      encrypt: true,
      thumbnailBytes: [],
      callback: (totalBytes, completedBytes, fileName, blobURL, error) => {
        console.log(`Upload progress for ${fileName}: ${completedBytes}/${totalBytes} bytes`);
        if (error) {
          console.error(`Error: ${error}`);
        }
      }
    }
    // Add more files here ...
  ]
})

if (result.success) {
  console.log('Upload completed successfully');
} else {
  console.error(`Upload failed: ${result.error}`);
}

`pauseUpload`

Pauses the upload operation of a file.

To resume the upload, call the multiUpload method with the same bulkUploadOptions parameter again.

Parameters

Name	Type	Description
`wallet`	`ActiveWallet`	Active Wallet details
`domain`	`NetworkDomain`	Network domain for the upload
`allocationId`	`string`	Allocation ID where the file is being uploaded
`remotePath`	`string`	Remote path of the file to pause

Example

import { pauseUpload } from '@zerochain/sdk'

await pauseUpload({
  wallet: activeWallet,
  domain: 'mainnet.zus.network',
  allocationId: '8695f8af52cdfc1e66d879407a5278703579d31de7ce0e2cf1707fdec9cc14c3',
  remotePath: '/my-folder/file1.txt'
})

`cancelUpload`

Cancels the upload operation of a file.

Parameters

Name	Type	Description
`wallet`	`ActiveWallet`	Active Wallet details
`domain`	`NetworkDomain`	Network domain for the upload
`allocationId`	`string`	Allocation ID where the file is being uploaded
`remotePath`	`string`	Remote path of the file to cancel

Example

import { cancelUpload } from '@zerochain/sdk'

await cancelUpload({
  wallet: activeWallet,
  domain: 'mainnet.zus.network',
  allocationId: '8695f8af52cdfc1e66d879407a5278703579d31de7ce0e2cf1707fdec9cc14c3',
  remotePath: '/my-folder/file1.txt'
})

`getFileStats`

Retrieves details for a file in an allocation.

Parameters

Name	Type	Description
`domain`	`NetworkDomain`	Network domain for the allocation
`wallet`	`ActiveWallet`	Active Wallet details
`allocationId`	`string`	Allocation ID where the file is located
`remotePath`	`string`	Remote path of the file to retrieve details for

Return Type

Promise<FileStats[]>

Example

import { getFileStats } from '@zerochain/sdk'

const fileStats = await getFileStats({
  domain: 'mainnet.zus.network',
  wallet: activeWallet,
  allocationId: '8695f8af52cdfc1e66d879407a5278703579d31de7ce0e2cf1707fdec9cc14c3',
  remotePath: '/my-folder/file1.txt'
})

`listObjects`

Lists the files for a given allocation ID and remote path.

Parameters

Name	Type	Description	Default value
`domain`	`NetworkDomain`	Network domain for the allocation
`wallet`	`ActiveWallet`	Active Wallet details
`allocationId`	`string`	Allocation ID to list files from
`remotePath`	`string`	Remote path of the directory to list
`offset`	`number`	Pagination offset for the list. Use `0` to turn off pagination.	`0`
`pageLimit`	`number`	Number of items per page. Use `-1` to turn off pagination.	`-1`

Return Type

Promise<ListResult>

Example

import { listObjects } from '@zerochain/sdk'

// list all files in a directory `/my-folder` without pagination
const listResult = await listObjects({
  domain: 'mainnet.zus.network',
  wallet: activeWallet,
  allocationId: '8695f8af52cdfc1e66d879407a5278703579d31de7ce0e2cf1707fdec9cc14c3',
  remotePath: '/my-folder',
})

`getFileMetaByName`

Retrieves file metadata by name (file search). This method allows you to search for files within an allocation by their name and optionally modify the returned file references.

Parameters

Name	Type	Description
`wallet`	`ActiveWallet`	Active Wallet details
`domain`	`NetworkDomain`	Network domain for the allocation
`allocationId`	`string`	Allocation ID to search within
`fileName`	`string`	Name of the file to search for
`modifyFileRef`	`(file: FileRefByName) => T`	Optional function to modify the returned file references

Return Type

Promise<T[] | FileRefByName[]>

Example

import { getFileMetaByName } from '@zerochain/sdk'

const fileMetadata = await getFileMetaByName({
  wallet: activeWallet,
  domain: 'mainnet.zus.network',
  allocationId: '8695f8af52cdfc1e66d879407a5278703579d31de7ce0e2cf1707fdec9cc14c3',
  fileName: 'file1.txt',
  modifyFileRef: (file) => ({
    ...file,
    customField: 'customValue' // Add custom fields if needed
  })
})

`multiDownload`

Downloads multiple files in parallel in a batch. This method supports downloading files directly to disk (if supported by the browser) and provides progress updates via a callback function.

Parameters

Name	Type	Description	Default value
`domain`	`NetworkDomain`	Network domain for the download
`wallet`	`ActiveWallet`	Active Wallet details
`allocationId`	`string`	Allocation ID where the files are located
`authTicket`	`string`	Required only for downloading shared files (non-owner)	`''`
`multiDownloadOptions`	`MultiDownloadOption[]`	Array of download options for each file
`callback`	`(totalBytes: number, completedBytes: number, fileName: string, blobURL: string, error?: string) => void`	Callback function invoked with progress updates

MultiDownloadOption Type

type MultiDownloadOption = {
  /** Remote path of the file to be downloaded */
  remotePath: string
  /** Local path where the file should be stored (optional) */
  localPath?: string
  /** Download operation type */
  downloadType: 'file' | 'thumbnail'
  /** Number of blocks to download per request */
  numBlocks?: number
  /** Required only for file download with an auth ticket */
  remoteFileName: string
  /** Lookup hash for remote file, required for auth ticket downloads */
  remoteLookupHash?: string
  /** Whether to download the file directly to disk (not supported on Safari) */
  downloadToDisk: boolean
  /** Suggested name for the file when downloading to disk (optional) */
  suggestedName?: string
}

Callback Parameters

Name	Type	Description
`totalBytes`	`number`	Total bytes to download
`completedBytes`	`number`	Bytes downloaded so far
`fileName`	`string`	Name of the file being downloaded
`blobURL`	`string`	URL of the downloaded file
`error`	`string`	Error message, if any

Return Type

Promise<DownloadCommandResponse[]>

DownloadCommandResponse Type

type DownloadCommandResponse = {
  commandSuccess: boolean
  error?: string
  /** Name of the downloaded file */
  fileName?: string
  /** Blob URL of the downloaded file */
  url?: string
}

Example

import { multiDownload } from '@zerochain/sdk'

const downloadResponses = await multiDownload({
  domain: 'mainnet.zus.network',
  wallet: activeWallet,
  allocationId: '8695f8af52cdfc1e66d879407a5278703579d31de7ce0e2cf1707fdec9cc14c3',
  multiDownloadOptions: [
    {
      remotePath: '/my-folder/file1.txt',
      downloadType: 'file',
      numBlocks: 100,
      remoteFileName: 'file1.txt',
      downloadToDisk: true,
      suggestedName: 'file1.txt'
    }
    // Add more download options as needed
  ],
  callback: (totalBytes, completedBytes, fileName, blobURL, error) => {
    console.log(`Download progress for ${fileName}: ${completedBytes}/${totalBytes} bytes`);
    if (error) {
      console.error(`Error: ${error}`);
    }
  }
})

`downloadBlocks`

Downloads a specified range of blocks from a file. This method is useful for downloading specific parts of a file, such as for resuming downloads or streaming.

Parameters

Name	Type	Description	Default value
`domain`	`NetworkDomain`	Network domain for the download
`wallet`	`ActiveWallet`	Active Wallet details
`allocationId`	`string`	Allocation ID where the file is located
`remotePath`	`string`	Remote path of the file to download
`authTicket`	`string`	Required only for downloading shared files (non-owner)	`''`
`lookupHash`	`string`	Lookup hash of the file, used to locate the file if `remotePath` and `allocationId` are not provided
`writeChunkFunc`	`(lookupHash: string, chunk: Uint8Array, offset: number) => void`	Function to handle downloaded chunks
`startBlock`	`number`	Starting block number to download
`endBlock`	`number`	Ending block number to download

Return Type

Promise<Uint8Array>

Example

import { downloadBlocks } from '@zerochain/sdk'

const writeChunkFunc = (lookupHash: string, chunk: Uint8Array, offset: number) => {
  console.log(`Received chunk for ${lookupHash} at offset ${offset}`);
  // Handle the chunk (e.g., save to disk or process further)
}

const downloadedBlocks = await downloadBlocks({
  domain: 'mainnet.zus.network',
  wallet: activeWallet,
  allocationId: '8695f8af52cdfc1e66d879407a5278703579d31de7ce0e2cf1707fdec9cc14c3',
  remotePath: '/my-folder/file1.txt',
  writeChunkFunc,
  startBlock: 0,
  endBlock: 10
})

console.log('Downloaded blocks:', downloadedBlocks);

`cancelDownloadBlocks`

Cancels the download of a specified range of blocks from a file. This method is used to stop an ongoing block download initiated by the downloadBlocks method.

Parameters

Name	Type	Description
`domain`	`NetworkDomain`	Network domain for the download
`wallet`	`ActiveWallet`	Active Wallet details
`allocationId`	`string`	Allocation ID associated with the file
`remotePath`	`string`	Remote path where the file is located
`start`	`number`	Start block number previously used in the `downloadBlocks` call
`end`	`number`	End block number previously used in the `downloadBlocks` call

Example

import { cancelDownloadBlocks } from '@zerochain/sdk'

await cancelDownloadBlocks({
  domain: 'mainnet.zus.network',
  wallet: activeWallet,
  allocationId: '8695f8af52cdfc1e66d879407a5278703579d31de7ce0e2cf1707fdec9cc14c3',
  remotePath: '/my-folder/file1.txt',
  start: 0,
  end: 10
})

`downloadDirectory`

Downloads files in a directory recursively. This method supports downloading all files/folders in a specified directory and provides progress updates via a callback function.

Parameters

Name	Type	Description	Default value
`domain`	`NetworkDomain`	Network domain for the download
`wallet`	`ActiveWallet`	Active Wallet details
`allocationId`	`string`	Allocation ID where the directory is located
`authTicket`	`string`	Required only for downloading shared directories (non-owner)	`''`
`remotePath`	`string`	Remote path of the directory to download
`callback`	`(totalBytes: number, completedBytes: number, fileName: string, blobURL: string, error?: string) => void`	Callback function invoked with progress updates

Callback Parameters

Name	Type	Description
`totalBytes`	`number`	Total bytes to download
`completedBytes`	`number`	Bytes downloaded so far
`fileName`	`string`	Name of the file being downloaded
`blobURL`	`string`	URL of the downloaded file
`error`	`string`	Error message, if any

Example

import { downloadDirectory } from '@zerochain/sdk'

await downloadDirectory({
  domain: 'mainnet.zus.network',
  wallet: activeWallet,
  allocationId: '8695f8af52cdfc1e66d879407a5278703579d31de7ce0e2cf1707fdec9cc14c3',
  remotePath: '/my-folder',
  callback: (totalBytes, completedBytes, fileName, blobURL, error) => {
    console.log(`Download progress for ${fileName}: ${completedBytes}/${totalBytes} bytes`);
    if (error) {
      console.error(`Error: ${error}`);
    }
  }
})

`cancelDownloadDirectory`

Cancels the download of a directory initiated by downloadDirectory.

Parameters

Name	Type	Description
`domain`	`NetworkDomain`	Network domain for the download
`wallet`	`ActiveWallet`	Active Wallet details
`remotePath`	`string`	Remote path of the directory to cancel

Example

import { cancelDownloadDirectory } from '@zerochain/sdk'

await cancelDownloadDirectory({
  domain: 'mainnet.zus.network',
  wallet: activeWallet,
  remotePath: '/my-folder'
})

`multiOperation`

Performs multiple operations (copy, move, delete, create directory) together in a single batch.

Parameters

Name	Type	Description
`domain`	`NetworkDomain`	Network domain for the operations
`wallet`	`ActiveWallet`	Active Wallet details
`allocationId`	`string`	Allocation ID where the operations will be performed
`operations`	`MultiOperationOption[]`	Array of operations to perform

MultiOperationOption Type

type MultiOperationOption = {
  /** Type of operation: 'copy', 'move', 'delete', or 'createdir' */
  operationType: 'copy' | 'move' | 'delete' | 'createdir'
  /** Remote path of the file/directory */
  remotePath: string
  /** Destination name (only for rename operation) */
  destName?: string
  /** Destination path (required for copy and move operations) */
  destPath?: string
}

Example

import { multiOperation } from '@zerochain/sdk'

await multiOperation({
  domain: 'mainnet.zus.network',
  wallet: activeWallet,
  allocationId: '8695f8af52cdfc1e66d879407a5278703579d31de7ce0e2cf1707fdec9cc14c3',
  operations: [
    {
      operationType: 'copy',
      remotePath: '/my-folder/file1.txt',
      destPath: '/my-folder/copy-file1.txt'
    },
    {
      operationType: 'delete',
      remotePath: '/my-folder/file2.txt'
    },
    {
      operationType: 'createdir',
      remotePath: '/my-folder/new-directory'
    }
  ]
})

`deleteFile`

Deletes a file from an allocation. Only the owner of the allocation can delete a file.

note

To perform multiple deletions in a single call, use the multiOperation method instead.

Parameters

Name	Type	Description
`domain`	`NetworkDomain`	Network domain for the operation
`wallet`	`ActiveWallet`	Active Wallet details
`allocationId`	`string`	Allocation ID where the file is located
`remotePath`	`string`	Remote path of the file to delete

Return Type

Promise<{ commandSuccess: boolean; error: string }>

Example

import { deleteFile } from '@zerochain/sdk'

const result = await deleteFile({
  domain: 'mainnet.zus.network',
  wallet: activeWallet,
  allocationId: '8695f8af52cdfc1e66d879407a5278703579d31de7ce0e2cf1707fdec9cc14c3',
  remotePath: '/my-folder/file1.txt'
})

if (result.commandSuccess) {
  console.log('File deleted successfully');
} else {
  console.error(`Error: ${result.error}`);
}

`share`

Generates an authTicket that provides authorization to the holder to access the specified file on the remote path. This method is used to share files with other users.

Parameters

Name	Type	Description	Default value
`domain`	`NetworkDomain`	Network domain for the operation
`wallet`	`ActiveWallet`	Active Wallet details
`allocationId`	`string`	Allocation ID where the file is located
`remotePath`	`string`	Remote path of the file to be shared
`clientId`	`string`	Client ID / wallet ID of the recipient (for private sharing)	`""`
`encryptionPublicKey`	`string`	Encryption public key of the recipient (for private sharing)	`""`
`expiration`	`number`	Expiration time of the auth ticket (in Unix timestamp seconds. e.g. `1647858200`). Defaults to 0 (no expiration)	`0`
`revoke`	`boolean`	Whether to revoke the share. (for private sharing)	`false`
`availableAfter`	`string`	Time after which the share becomes available. Possible formats: 1. Relative time with duration format (local timezone): - `+1h5m` → Now + 1 hour 5 minutes - `+30s` → Now + 30 seconds - `+2h` → Now + 2 hours 2. Relative time with total seconds (local timezone): - `+3900` → Now + 3900 seconds (1 hour 5 minutes) - `+86400` → Now + 1 day (24 hours) 3. Unix timestamp (UTC-based): - `1647858200` → Parses as a Unix timestamp 4. Absolute UTC datetime (`YYYY-MM-DD HH:mm:ss`): - `2022-03-21 10:21:38` → Parses as `March 21, 2022, 10:21:38 UTC`	`""`

Return Type

Promise<string>

Example

import { share } from '@zerochain/sdk'

// Public share
const authTicket = await share({
  domain: 'mainnet.zus.network',
  wallet: activeWallet,
  allocationId: '8695f8af52cdfc1e66d879407a5278703579d31de7ce0e2cf1707fdec9cc14c3',
  remotePath: '/my-folder/file1.txt',
})

// Private share
await share({
  domain: 'mainnet.zus.network',
  wallet: activeWallet,
  allocationId: '8695f8af52cdfc1e66d879407a5278703579d31de7ce0e2cf1707fdec9cc14c3',
  remotePath: '/my-folder/file1.txt',
  clientId: recipientWalletId,
  encryptionPublicKey: recipientEncryptionPublicKey,
})

`listObjectsFromAuthTicket`

Lists objects from an auth ticket. This method is useful for accessing a shared source by a non-owner.

Parameters

Name	Type	Description	Default value
`domain`	`NetworkDomain`	Network domain for the operation
`wallet`	`ActiveWallet`	Active Wallet details
`allocationId`	`string`	Allocation ID where the shared source is located
`authTicket`	`string`	Auth ticket provided by a non-owner to access a shared source
`lookupHash`	`string`	Lookup hash for the file
`offset`	`number`	Pagination offset for the list. Use `0` to turn off pagination.	`0`
`pageLimit`	`number`	Number of items per page. Use `-1` to turn off pagination.	`-1`

Return Type

Promise<ListResult>

Example

import { listObjectsFromAuthTicket } from '@zerochain/sdk'

const listResult = await listObjectsFromAuthTicket({
  domain: 'mainnet.zus.network',
  wallet: activeWallet,
  allocationId: '8695f8af52cdfc1e66d879407a5278703579d31de7ce0e2cf1707fdec9cc14c3',
  authTicket: authTicketOfTheSharedFileOrFolder,
  lookupHash: lookupHashOfTheSharedFileOrFolder,
})

Prerequisites​

File Operations Methods​

getLookupHash​

Parameters​

Return Type​

Example​

createDir​

Parameters​

Example​

setUploadMode​

Parameters​

Example​

multiUpload​

Parameters​

BulkUploadOption Type​

Callback Parameters​

Return Type​

Example​

pauseUpload​

Parameters​

Example​

cancelUpload​

Parameters​

Example​

getFileStats​

Parameters​

Return Type​

Example​

listObjects​

Parameters​

Return Type​

Example​

getFileMetaByName​

Parameters​

Return Type​

Example​

multiDownload​

Parameters​

MultiDownloadOption Type​

Callback Parameters​

Return Type​

DownloadCommandResponse Type​

Example​

downloadBlocks​

Parameters​

Return Type​

Example​

cancelDownloadBlocks​

Parameters​

Example​

downloadDirectory​

Parameters​

Callback Parameters​

Example​

cancelDownloadDirectory​

Parameters​

Example​

multiOperation​

Parameters​

MultiOperationOption Type​

Example​

deleteFile​

Parameters​

Return Type​

Example​

share​

Parameters​

Return Type​

Example​

listObjectsFromAuthTicket​

Parameters​

Return Type​

Example​

Prerequisites

File Operations Methods

`getLookupHash`

Parameters

Return Type

Example

`createDir`

Parameters

Example

`setUploadMode`

Parameters

Example

`multiUpload`

Parameters

BulkUploadOption Type

Callback Parameters

Return Type

Example

`pauseUpload`

Parameters

Example

`cancelUpload`

Parameters

Example

`getFileStats`

Parameters

Return Type

Example

`listObjects`

Parameters

Return Type

Example

`getFileMetaByName`

Parameters

Return Type

Example

`multiDownload`

Parameters

MultiDownloadOption Type

Callback Parameters

Return Type

DownloadCommandResponse Type

Example

`downloadBlocks`

Parameters

Return Type

Example

`cancelDownloadBlocks`

Parameters

Example

`downloadDirectory`

Parameters

Callback Parameters

Example

`cancelDownloadDirectory`

Parameters

Example

`multiOperation`

Parameters

MultiOperationOption Type

Example

`deleteFile`

Parameters

Return Type

Example

`share`

Parameters

Return Type

Example

`listObjectsFromAuthTicket`

Parameters

Return Type

Example