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Bucket Storage

Tutorial for accessing bucket through Python MCS SDK

In a multichain storage system, a bucket is a logical container that stores folders or files. Each bucket has a unique name and can contain any number of folders and files. Folders are virtual containers that organize files and help manage data, and files are individual data objects that can be of any type or format. MCS Bucket files are referred to as objects.

This section describes how to use the python-MCS-SDK to perform common operations on the MCS bucket.

from swan_mcs import APIClient, BucketAPI
mcs_api = APIClient("<API_KEY>", "<ACCESS_TOKEN>", "<CHAIN_NAME>")
for i in bucket_client.list_buckets():
    print(i.to_json())
from swan_mcs import APIClient, BucketAPI
mcs_api = APIClient("<API_KEY>", "<ACCESS_TOKEN>", "<CHAIN_NAME>")
bucket_client = BucketAPI(mcs_api)
# Return true if bucket created, else False
bucket_client.delete_bucket(bucket_name)
from swan_mcs import APIClient, BucketAPI
mcs_api = APIClient("<API_KEY>", "<ACCESS_TOKEN>", "<CHAIN_NAME>")
bucket_client = BucketAPI(mcs_api)
# Return None if MCS cannot find this bucket
print(bucket_client.get_bucket("<BUCKET_NAME>","<BUCKET_UID>").to_json())

Create an MCS Bucket

create_bucket(bucket_name)

Creates a bucket. Buckets under the same account cannot share the same name.

from swan_mcs import APIClient, BucketAPI
mcs_api = APIClient("<API_KEY>", "<ACCESS_TOKEN>", "<CHAIN_NAME>")
bucket_client = BucketAPI(mcs_api)

bucket_client.create_bucket("<BUCKET_NAME>")

Parameters

  • bucket_name: The name of the bucket

Return

Returns True if the bucket creation was successful

True

Get Buckets

list_buckets()

List all the existing buckets for the MCS account.

from swan_mcs import APIClient, BucketAPI
mcs_api = APIClient("<API_KEY>", "<ACCESS_TOKEN>", "<CHAIN_NAME>")
bucket_client = BucketAPI(mcs_api)

for i in bucket_client.list_buckets():
    print(i.to_json())

Return

Returns a list of Bucket Objects

{
    "address": "0xA87...9b0",
    "bucket_name": "test-bucket",
    "bucket_uid": "8721a157-8233-4d08-bb11-1911e759c2bb",
    "created_at": "2023-01-04T17:52:04Z",
    "deleted_at": null,
    "file_number": 4,
    "is_active": true,
    "is_deleted": false,
    "is_free": true,
    "max_size": 34359738368,
    "size": 9988,
    "updated_at": "2023-01-04T17:52:04Z"
}
{
    "address": "0xA87...9b0",
    "bucket_name": "test-bucket2",
    "bucket_uid": "552f8339-4d01-4163-8e1e-34e4b1df22fe",
    "created_at": "2023-02-27T16:20:48Z",
    "deleted_at": null,
    "file_number": 0,
    "is_active": true,
    "is_deleted": false,
    "is_free": true,
    "max_size": 34359738368,
    "size": 0,
    "updated_at": "2023-02-27T16:20:48Z"
}
...

Delete Bucket

delete_bucket(bucket_name)

Removes a bucket from your account.

from swan_mcs import APIClient, BucketAPI
mcs_api = APIClient("<API_KEY>", "<ACCESS_TOKEN>", "<CHAIN_NAME>")
bucket_client = BucketAPI(mcs_api)

bucket_client.delete_bucket("<BUCKET_NAME>")

Parameters

  • bucket_name: The name of the bucket

Return

Returns True if the deletion was successful

True

Get Bucket information

get_bucket(bucket_name)

from swan_mcs import APIClient, BucketAPI
mcs_api = APIClient("<API_KEY>", "<ACCESS_TOKEN>", "<CHAIN_NAME>")
bucket_client = BucketAPI(mcs_api)

print(bucket_client.get_bucket("<BUCKET_NAME>").to_json())

Parameters

  • bucket_name: The name of the bucket

Return

Returns a Bucket Object

{
    "address": "0xA87...9b0",
    "bucket_name": "test-bucket",
    "bucket_uid": "8721a157-8233-4d08-bb11-1911e759c2bb",
    "created_at": "2023-01-04T17:52:04Z",
    "deleted_at": null,
    "file_number": 4,
    "is_active": true,
    "is_deleted": false,
    "is_free": true,
    "max_size": 34359738368,
    "size": 9988,
    "updated_at": "2023-01-04T17:52:04Z"
}

Create folder

create_folder(bucket_name, folder_name, prefix='')

The create_folder the method allows you to create a folder in the specified bucket. It accepts buckets name, folder names, and prefixes. The folder will be created in bucket_name/prefix/folder_name

from swan_mcs import APIClient, BucketAPI
mcs_api = APIClient("<API_KEY>", "<ACCESS_TOKEN>", "<CHAIN_NAME>")
bucket_client = BucketAPI(mcs_api)

# If you want to place the folder directly in the root directory, you can leave the prefix field empty
bucket_client.create_folder("<BUCKET_NAME>","<FOLDER_NAME>","<PREFIX>")

Parameters

  • bucket_name: The name of the bucket

  • folder_name: The name of the folder to create

  • prefix: The prefix for the folder's object name

Return

Returns True if the folder creation was successful

True

Uploading file

upload_file(bucket_name, object_name, file_path, replace=False)

Uploads a file to a bucket. Use the bucket_name to select the bucket, and object_name to select the path and file name of the uploaded file. file_path is the local path of the file.

from swan_mcs import APIClient, BucketAPI
mcs_api = APIClient("<API_KEY>", "<ACCESS_TOKEN>", "<CHAIN_NAME>")
bucket_client = BucketAPI(mcs_api)

# Object name is the destination path you want to upload to the bucket
# For example, if you want to upload the testfile.json file to path 111/222 in the TEST bucket, you would write: 
# bucket_client.upload_file("TEST", "111/222/testfile.json", "<FILE_PATH>")
bucket_client.upload_file("<BUCKET_NAME>", "<OBJECT_NAME>", "<FILE_PATH>")

Parameters

  • bucket_name: The name of the bucket

  • object_name: The object name of the file ex. 'folder1/file.png' will upload the file as file.png inside bucket_name/folder1

  • file_path: The local file path

  • replace: File's of the same name cannot be uploaded. When replace is set to True, it will overwrite the previous file of the same name.

Return

Returns a File Object

{
    "address": "0xA87...9b0",
    "bucket_uid": "8721a157-8233-4d08-bb11-1911e759c2bb",
    "created_at": "2023-02-08T18:35:33Z",
    "deleted_at": null,
    "filehash": "65a8e27d8879283831b664bd8b7f0ad4",
    "gateway": "https://fce2d84f11.calibration-swan-acl.filswan.com/",
    "id": 6153,
    "ipfs_url": "https://ipfs.multichain.storage/ipfs/Qm...",
    "is_deleted": false,
    "is_folder": false,
    "name": "file1.txt",
    "object_name": "file1.txt",
    "payloadCid": "Qm...",
    "pin_status": "Pinned",
    "prefix": "",
    "size": 13,
    "type": 2,
    "updated_at": "2023-02-08T18:35:33Z"
}

Uploading MCS Folder

upload_folder(self, bucket_name, object_name, folder_path)

Uploads folder_path as a MCS folder under bucket_name/object_name

from swan_mcs import APIClient, BucketAPI
mcs_api = APIClient("<API_KEY>", "<ACCESS_TOKEN>", "<CHAIN_NAME>")
bucket_client = BucketAPI(mcs_api)

bucket_client.upload_folder("<BUCKET_NAME>", "<OBJECT_NAME>", "<FOLDER_PATH>")

Parameters

  • bucket_name: The name of the bucket

  • object_name: The object name for the folder

  • folder_path: Local path of your folder

Return

Returns a list of File Objects

[
  {
    "address": "0xA87...9b0",
    "bucket_uid": "8721a157-8233-4d08-bb11-1911e759c2bb",
    "created_at": "2023-02-08T18:35:33Z",
    "deleted_at": null,
    "filehash": "65a8e27d8879283831b664bd8b7f0ad4",
    "gateway": "https://fce2d84f11.calibration-swan-acl.filswan.com/",
    "id": 6153,
    "ipfs_url": "https://ipfs.multichain.storage/ipfs/Qm...",
    "is_deleted": false,
    "is_folder": false,
    "name": "file1.txt",
    "object_name": "file1.txt",
    "payloadCid": "Qm...",
    "pin_status": "Pinned",
    "prefix": "",
    "size": 13,
    "type": 2,
    "updated_at": "2023-02-08T18:35:33Z"
  },
  {
    "address": "0xA87...9b0",
    "bucket_uid": "8721a157-8233-4d08-bb11-1911e759c2bb",
    "created_at": "2023-02-08T18:35:33Z",
    "deleted_at": null,
    "filehash": "65a8e27d8879283831b664bd8b7f0ad4",
    "gateway": "https://fce2d84f11.calibration-swan-acl.filswan.com/",
    "id": 6153,
    "ipfs_url": "https://ipfs.multichain.storage/ipfs/Qm...",
    "is_deleted": false,
    "is_folder": false,
    "name": "file1.txt",
    "object_name": "file1.txt",
    "payloadCid": "Qm...",
    "pin_status": "Pinned",
    "prefix": "",
    "size": 13,
    "type": 2,
    "updated_at": "2023-02-08T18:35:33Z"
  },
...
]

Upload IPFS Folder

upload_ipfs_folder(self, bucket_name, object_name, folder_path)

Uploads folder_path as an IPFS folder to MCS. This gives the folder its own CID, sharable to others.

from swan_mcs import APIClient, BucketAPI
mcs_api = APIClient("<API_KEY>", "<ACCESS_TOKEN>", "<CHAIN_NAME>")
bucket_client = BucketAPI(mcs_api)

bucket_client.upload_ipfs_folder("<BUCKET_NAME>", "<OBJECT_NAME>", "<FOLDER_PATH>")

Parameters

  • bucket_name: The name of the bucket

  • object_name: The object name for the folder

  • folder_path: Local path of your folder

Return

Returns a File Object for your IPFS folder

{
    "address": "0xA87...9b0",
    "bucket_uid": "8721a157-8233-4d08-bb11-1911e759c2bb",
    "created_at": "2023-02-08T18:35:33Z",
    "deleted_at": null,
    "filehash": "65a8e27d8879283831b664bd8b7f0ad4",
    "gateway": "https://fce2d84f11.calibration-swan-acl.filswan.com/",
    "id": 6153,
    "ipfs_url": "https://ipfs.multichain.storage/ipfs/Qm...",
    "is_deleted": false,
    "is_folder": false,
    "name": "file1.txt",
    "object_name": "ipfs-folder1",
    "payloadCid": "Qm...",
    "pin_status": "Pinned",
    "prefix": "",
    "size": 13,
    "type": 1,
    "updated_at": "2023-02-08T18:35:33Z"
}

Downloading file

download_file(bucket_name, object_name, local_filename)

Downloads the file (located using bucket_name/object_name from IPFS and writes it to local_filename

from swan_mcs import APIClient, BucketAPI
mcs_api = APIClient("<API_KEY>", "<ACCESS_TOKEN>", "<CHAIN_NAME>")
bucket_client = BucketAPI(mcs_api)

bucket_client.download_file("<BUCKET_NAME>", "<OBJECT_NAME>", "<LOCAL_FILENAME>")

Parameters

  • bucket_name: The name of the bucket

  • object_name: The object name to download

  • local_filename: The download destination and filename

Return

Returns True if the file was downloaded successfully

True

Deleting file

delete_file(bucket_name, object_name)

Removes a file from a bucket

from swan_mcs import APIClient, BucketAPI
mcs_api = APIClient("<API_KEY>", "<ACCESS_TOKEN>", "<CHAIN_NAME>")
bucket_client = BucketAPI(mcs_api)

bucket_client.delete_file("<BUCKET_NAME>", "<OBJECT_NAME>")

Parameters

  • bucket_name: The name of the bucket

  • object_name: The object name to delete

Return

Returns True if the deletion was successful

True

Get file

get_file(bucket_name, object_name)

Get the file information of a file in one of your buckets

from swan_mcs import APIClient, BucketAPI
mcs_api = APIClient("<API_KEY>", "<ACCESS_TOKEN>", "<CHAIN_NAME>")
bucket_client = BucketAPI(mcs_api)

print(bucket_client.get_file("<BUCKET_NAME>", "<OBJECT_NAME>").to_json())

Parameters

  • bucket_name: The name of the bucket

  • object_name: The object name of the file

Return

Returns a File Object

{
    "address": "0xA87...9b0",
    "bucket_uid": "8721a157-8233-4d08-bb11-1911e759c2bb",
    "created_at": "2023-02-08T18:35:33Z",
    "deleted_at": null,
    "filehash": "65a8e27d8879283831b664bd8b7f0ad4",
    "gateway": "https://fce2d84f11.calibration-swan-acl.filswan.com/",
    "id": 6153,
    "ipfs_url": "https://ipfs.multichain.storage/ipfs/Qm...",
    "is_deleted": false,
    "is_folder": false,
    "name": "file1.txt",
    "object_name": "file1.txt",
    "payloadCid": "Qm...",
    "pin_status": "Pinned",
    "prefix": "",
    "size": 13,
    "type": 2,
    "updated_at": "2023-02-08T18:35:33Z"
}

Get file list

list_files(bucket_name, prefix='', limit=10, offset=0)

Get a list of file information from one of your buckets

from swan_mcs import APIClient, BucketAPI
mcs_api = APIClient("<API_KEY>", "<ACCESS_TOKEN>", "<CHAIN_NAME>")
bucket_client = BucketAPI(mcs_api)

for i in api.list_files("<BUCKET_NAME>", '<PREFIX>', "<LIMIT>", '<OFFSET>'):
    print(i.to_json())

Return

Returns a list of File Objects

[
  {
    "address": "0xA87...9b0",
    "bucket_uid": "8721a157-8233-4d08-bb11-1911e759c2bb",
    "created_at": "2023-02-08T18:35:33Z",
    "deleted_at": null,
    "filehash": "65a8e27d8879283831b664bd8b7f0ad4",
    "gateway": "https://fce2d84f11.calibration-swan-acl.filswan.com/",
    "id": 6153,
    "ipfs_url": "https://ipfs.multichain.storage/ipfs/Qm...",
    "is_deleted": false,
    "is_folder": false,
    "name": "file1.txt",
    "object_name": "file1.txt",
    "payloadCid": "Qm...",
    "pin_status": "Pinned",
    "prefix": "",
    "size": 13,
    "type": 2,
    "updated_at": "2023-02-08T18:35:33Z"
  },
  {
    "address": "0xA87...9b0",
    "bucket_uid": "8721a157-8233-4d08-bb11-1911e759c2bb",
    "created_at": "2023-02-08T18:35:33Z",
    "deleted_at": null,
    "filehash": "65a8e27d8879283831b664bd8b7f0ad4",
    "gateway": "https://fce2d84f11.calibration-swan-acl.filswan.com/",
    "id": 6153,
    "ipfs_url": "https://ipfs.multichain.storage/ipfs/Qm...",
    "is_deleted": false,
    "is_folder": false,
    "name": "file1.txt",
    "object_name": "file1.txt",
    "payloadCid": "Qm...",
    "pin_status": "Pinned",
    "prefix": "",
    "size": 13,
    "type": 2,
    "updated_at": "2023-02-08T18:35:33Z"
  },
...
]
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