File Operations RPC API

The API is based on JSON-RPC 2.0 specs. The user works as a client and a resource node provides service as a server.

When the client sends a request to the server by calling to a method, the server sends the response back as the return.

The format of a request message is:

{
    "jsonrpc":"2.0",
    "id":1,
    "method":"user_methodName",
    "params":[
        {
            "param1":"valueOfParam1",
            "param2":valueOfParam2,
            ...
        }
    ]
}

The format of a response message is:

{
    "jsonrpc":"2.0",
    "id":1,
    "result":
        {
            "return":"1",
            "extra_result_object1":value_object1,
            "extra_result_object2":value_object2,
            ...
        }
}

When "return" object in "result" is a string encoded negative number, it carries an error.

    "-1":  GENERIC_ERR           
    "-3":  SIGNATURE_FAILURE 
    "-4":  WRONG_FILE_SIZE 
    "-5":  OPERATION_TIME_OUT 
    "-6":  FILE_REQ_FAILURE 
    "-7":  WRONG_INPUT 
    "-8":  WRONG_PP_ADDRESS 
    "-9":  INTERNAL_DATA_FAILURE 
    "-10": INTERNAL_COMM_FAILURE 
    "-11": WRONG_FILE_INFO 
    "-12": WRONG_WALLET_ADDRESS

---

Upload a File

Three methods are used to accomplish uploading a file.

• user_requestGetOzone: get ozone balance and sequence number
• user_requestUpload: start uploading a file
• user_uploadData: upload a piece of file data

user_requestGetOzone

A request for ozone needs to be done before uploading a file. This method allows a check for ozone balance and a sequence number to be used in next uploading methods.

Parameters

name	type	comment
walletaddr	string	wallet address of the user account

Returns

name	type	comment
return	string	negative: errors; "1": success and expect for next user_uploadData; other values: invalid
ozone	string	the balance of nano ozone of this wallet
sequencynumber	string	a sequence number to be used in uploading a file

Example

Request

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "user_requestGetOzone",
  "params": [
    {
      "walletaddr": "st1r2gh2h8kjtz4slek6aua95ukyd8zmey2y9uatt"
    }
  ]
}

Response

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "return": "0",
    "ozone": "257695561060",
    "sequencynumber": "SN:0000000000000000028"
  }
}

user_requestUpload

To request to upload a file. The result could carry the offsets of a piece of the file to be uploaded if the request succeeded.

Parameters

name	type	comment
filename	string	name of the file
filesize	number	size of the file, in byte
filehash	string	file hash to identify a file 1
signature	object	signature on this message
desired_tier	number	the desired tier to store the file
allow_higher_tier	boolean	if higher tier allowed when no desired tier can't be found
req_time	number	the epoch time when this request is made

Object signature

name	type	comment
address	string	wallet address of the user account
pubkey	string	public key of wallet address
signature	string	signed on a message 23

Returns

name	type	comment
return	string	negative: errors; "1": success and expect for next user_uploadData; other values: invalid
offsetstart	number	the offset of beginning of the piece of file data, inclusive
offsetend	number	the offset of end of the piece of file data, exclusive

Example

Request

{
 "jsonrpc": "2.0",
 "id": 1,
 "method": "user_requestUpload",
 "params": [
  {
   "filename": "test_10m",
   "filesize": 10485760,
   "filehash": "v05j1m571efv3vuk3tq7airrfglanjvts4jrd4l8",
   "signature": {
    "address": "st144ykkar9fhl8khs7lwz0s7py9vj4w9adp37kt9",
    "pubkey": "stpub1q0ska45w724dy0n0jujuqcvn2c80fa9c69dth0v9flacxrxp7w2rsncclps",
    "signature": "178e5a84d721d8893b402fb502cbd66dbc349536f720bdaabd1674cd99e3a5272cd8a40ba0da9a61fe71abb1d0c4530de44983531b99d0e349a801e46c7b16d100"
   },
   "desired_tier": 2,
   "allow_higher_tier": true,
   "req_time": 1701267007
  }
 ]
}

Response

{
 "jsonrpc": "2.0",
 "id": 1,
 "result": {
  "return": "1",
  "offsetstart": 0,
  "offsetend": 3500000
 }
}

user_uploadData

Send a piece of file data to server according to the offset previously provided by the server.

Parameters

name	type	comment
filehash	string	file hash to identify a file
data	string	data of the piece of the file 4

Returns

name	type	comment
return	string	negative: errors; "1": success and offsets for next user_uploadData; "0": finished uploading; other values: invalid
offsetstart	number	the offset of begining of the piece of file data, inclusive
offsetend	number	the offset of end of the piece of file data, exclusive

Example

Request

{
 "jsonrpc": "2.0",
 "id": 1,
 "method": "user_uploadData",
 "params": [
  {
   "filehash": "v05j1m571efv3vuk3tq7airrfglanjvts4jrd4l8",
   "data": "xfYRzYszM+NbWW/nZJZqmI8W9aGlaFt7SBkkuL5nkx/5L ... "
  }
 ]
}

Response

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "return": "1",
    "offsetstart": 3500000,
    "offsetend": 7000000
  }
}

---

List Files

List files owned by this account.

user_requestList

Request listing files owned by the account with the wallet address.

Parameters

name	type	comment
signature	object	signature on this message
page	number	the list is paginated. Page number start from 0.
req_time	number	the epoch time when this request is made

Object signature

name	type	comment
address	string	wallet address of the user account
pubkey	string	public key of wallet address
signature	string	signed on a message 23

Returns

name	type	comment
return	string	negative: errors; "0": success; other value: invalid
fileinfo	objects	information for each file

In fileinof, these objects are included

name	type	comment
filehash	string	file hash to identify the file 1
filesize	number	size of the file, in byte
filename	string	name of the file
createtime	number	unix epoch time when the file was created

Examples

Request

{
 "jsonrpc": "2.0",
 "id": 1,
 "method": "user_requestList",
 "params": [
  {
   "signature": {
    "address": "st144ykkar9fhl8khs7lwz0s7py9vj4w9adp37kt9",
    "pubkey": "stpub1q0ska45w724dy0n0jujuqcvn2c80fa9c69dth0v9flacxrxp7w2rsncclps",
    "signature": "75d54f5b302d5c9d34ba0fe70153b4a1d7b6e54be90585ab706dc97ce038da4431a4053f976c14d1227af2a14b5a61a5133da634380e9d7ba67830cc52c2ec5001"
   },
   "page": 0,
   "req_time": 1701313602
  }
 ]
}

Response

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "return": "0",
    "fileinfo": [
      {
        "filehash": "v05ahm51atjqkpte7gnqa94bl3p731odvvdvfvo8",
        "filesize": 200000000,
        "filename": "file1_200M_jan22",
        "createtime": 1674433580
      },
      {
        "filehash": "v05ahm51buqelg70rjmcbqtn2qijc7um0ds1oedo",
        "filesize": 10000000,
        "filename": "file2_10M_jan20",
        "createtime": 1674250085
      },
      {
        "filehash": "v05ahm52po4iteumn1v58o3marnruc7l75km9rv8",
        "filesize": 50000000,
        "filename": "file3_50M_jan20",
        "createtime": 1674250338
      },
      {
        "filehash": "v05ahm53ec2f5c9lh92cqapp0mvtfcdphj1deb00",
        "filesize": 100000000,
        "filename": "file1_100M_jan20",
        "createtime": 1674240637
      },
      {
        "filehash": "v05ahm54ia4o2p8vjpluolshiugn1mrgqqhht6o0",
        "filesize": 209715200,
        "filename": "test_200m.bin",
        "createtime": 1674489434
      },
      {
        "filehash": "v05ahm54qtdk0oogho52ujtk5v6rdlpbhumfshmg",
        "filesize": 10000000,
        "filename": "file4_10M_jan20",
        "createtime": 1674253605
      }
    ],
    "totalnumber": 6
  }
}

---

Download a File

To download a file, there are four methods to be used.

• user_requestGetOzone: get ozone balance and sequence number
• user_requestDownload: to start downloading the file
• user_downloadData: to request a piece of file data
• user_downloadedFileInfo: request server verification of the downloaded file

user_requestGetOzone

A request for ozone needs to be done before uploading a file. This method allows a check for ozone balance and a sequence number to be used in next uploading methods.

Parameters

name	type	comment
walletaddr	string	wallet address of the user account
#### Returns

name	type	comment
return	string	negative: errors; "1": success and expect for next user_uploadData; other values: invalid
ozone	string	the balance of nano ozone of this wallet
sequencynumber	string	a sequence number to be used in uploading a file

Example

Request

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "user_requestGetOzone",
  "params": [
    {
      "walletaddr": "st1r2gh2h8kjtz4slek6aua95ukyd8zmey2y9uatt"
    }
  ]
}

Response

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "return": "0",
    "ozone": "257695561060",
    "sequencynumber": "SN:0000000000000000028"
  }
}

user_requestDownload

To start downloading a file. A piece of fire data is carried in the response while successfully started.

Parameters

name	type	comment
filehandle	string	url of the file in sdm:// format 5
signature	object	signature on this message
req_time	number	the epoch time when this request is made
Object signature

name	type	comment
address	string	wallet address of the user account
pubkey	string	public key of wallet address
signature	string	signed on a message 23

Returns

name	type	comment
return	string	negative: errors; "2": file data provided; other value: invalid
reqid	string	to identify download instances when multiple download happen at same time
offsetstart	number	the offset of beginning of the piece of file data, inclusive
offsetend	number	the offset of end of the piece of file data, exclusive
filename	string	the name of the file
filedata	string	data of the piece of the file 4

Example

Request

{
 "jsonrpc": "2.0",
 "id": 1,
 "method": "user_requestDownload",
 "params": [
  {
   "filehandle": "sdm://st144ykkar9fhl8khs7lwz0s7py9vj4w9adp37kt9/v05j1m571efv3vuk3tq7airrfglanjvts4jrd4l8",
   "signature": {
    "address": "st144ykkar9fhl8khs7lwz0s7py9vj4w9adp37kt9",
    "pubkey": "stpub1q0ska45w724dy0n0jujuqcvn2c80fa9c69dth0v9flacxrxp7w2rsncclps",
    "signature": "9f8a13fe02cebe66b5144d7ef308c5b1c4d2f2f47a5509fa0921fd16463e2f4f66e77ed8068934307e39a47630e3ff4c3ff62fca403eedc3b9a59997ce145d6400"
   },
   "req_time": 1701314045
  }
 ]
}

Response

{
 "jsonrpc":"2.0",
 "id":1,
 "result":{
  "return":"2",
  "reqid":"58bb018a-bc6d-446b-bb9c-89867b5c1fe9",
  "offsetstart":0,
  "offsetend":3145728,
  "filename":"test_10m",
  "filedata":"xfYRzYszM+NbWW/nZJZqmI8W9aGz+uNVZJAUUDdoUpbnVvd2fOFJcz54642jxk5ZjcIQQv1i/lVehc36v/Czk0Pi5PPxZK ... "
 }
}    

user_downloadData

After the user handles previous piece of file data, this method is called to get the next piece.

Parameters

name	type	comment
filehash	string	file hash to identify a file 1
reqid	string	the same reqid get from response of user_requestDownload

Returns

name	type	comment
return	string	negative: errors; "2": file data provided; "3": no data and ask for calling user_downloadedFileInfo
reqid	string	to identify download instances when multiple download happen at same time
offsetstart	number	the offset of beginning of the piece of file data, inclusive
offsetend	number	the offset of end of the piece of file data, exclusive
filename	string	the name of the file
filedata	string	data of the piece of the file 4

Example

Request

{
 "jsonrpc": "2.0",
 "id": 1,
 "method": "user_downloadData",
 "params": [
  {
   "filehash": "v05ahm51buqelg70rjmcbqtn2qijc7um0ds1oedo",
   "reqid": "c97eafef-401f-49d1-bff3-7ce9eaa2c2dd"
  }
 ]
}

Response

{
 "jsonrpc":"2.0",
 "id":1,
 "result": {
   "return": "2",
   "offsetstart": 3145728,
   "offsetend": 6291456,
   "filename": "test_10m",
   "filedata": "QYILair4V84YdEyU+9kfOfwrGmNz7OIkxzlTcKiMk4aNcmwiLMDXScf+S17gUWpQds8oW88eLFCqdOaHPmrZYmqhFjGFV ... "
 }
}

Another Instance of Response

{
 "jsonrpc": "2.0",
 "id": 1,
 "result": {
  "return": "3",
  "reqid": "c97eafef-401f-49d1-bff3-7ce9eaa2c2dd"
 }
}

user_downloadedFileInfo

After the user received all pieces of the file and a response of user_downloadData with return value "3", this method is called to let the server verify file information and finish downloading.

Parameters

name	type	comment
filehash	string	recalculated file hash upon the received file 1
filesize	number	size of the file, in byte
reqid	string	the same reqid get from response of user_requestDownload

Returns

name	type	comment
return	string	negative: errors; "0": successful finished; other values: invalid

Example

Request

{
 "jsonrpc": "2.0",
 "id": 1,
 "method": "user_downloadedFileInfo",
 "params": [
  {
   "filehash": "v05ahm51buqelg70rjmcbqtn2qijc7um0ds1oedo",
   "filesize": 10000000,
   "reqid": "c97eafef-401f-49d1-bff3-7ce9eaa2c2dd"
  }
 ]
}

Response

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "return": "0"
  }
}

---

Share a File

user_requestShare

Parameters

name	type	comment
filehash	string	file hash to identify a file 1
signature	object	signature on this message
duration	number	duration in second sharing the file
privateflag	bool	if the file is private
req_time	number	the epoch time when this request is made

Object signature

name	type	comment
address	string	wallet address of the user account
pubkey	string	public key of wallet address
signature	string	signed on a message 23

Returns

name	type	comment
return	string	negative: errors; "0": success; other values: invalid
shareid	string	uniq identifier for this sharing
sharelink	string	link for accessing this shared file

Example

Request

{
 "jsonrpc": "2.0",
 "id": 1,
 "method": "user_requestShare",
 "params": [
  {
   "filehash": "v05j1m571efv3vuk3tq7airrfglanjvts4jrd4l8",
   "signature": {
    "address": "st144ykkar9fhl8khs7lwz0s7py9vj4w9adp37kt9",
    "pubkey": "stpub1q0ska45w724dy0n0jujuqcvn2c80fa9c69dth0v9flacxrxp7w2rsncclps",
    "signature": "c1d2b4b427689cdb7a9e5cdc58a405190e07bc608ec492c2efa0bba0d7c05ec11e963ed9b78a303a6adae608642d10257b70214acad8dac658b42d11bba998f001"
   },
   "duration": 0,
   "bool": false,
   "req_time": 1701315117
  }
 ]
}

Response

{
 "jsonrpc": "2.0",
 "id": 1,
 "result": {
  "return": "0",
  "shareid": "78a8fe38a826fed4",
  "sharelink": "RHumTB_78a8fe38a826fed4"
 }
}

---

Stop Sharing a File

user_requestStopShare

Parameters

name	type	comment
signature	object	signature on this message
shareid	string	a uniq identifier for this sharing
req_time	number	the epoch time when this request is made

Object signature

name	type	comment
address	string	wallet address of the user account
pubkey	string	public key of wallet address
signature	string	signed on a message 23

Returns

name	type	comment
return	string	negative: errors; "0": success; other values: invalid

Example

Request

{
 "jsonrpc": "2.0",
 "id": 1,
 "method": "user_requestStopShare",
 "params": [
  {
   "signature": {
    "address": "st144ykkar9fhl8khs7lwz0s7py9vj4w9adp37kt9",
    "pubkey": "stpub1q0ska45w724dy0n0jujuqcvn2c80fa9c69dth0v9flacxrxp7w2rsncclps",
    "signature": "83e9ae4ab17df35ab73b63104710414029adc5ebe1811c01fe1c75e1c95b58cd3efdb53aced3446390101945546e585fe5e5e351df74a95bb89fee3412e912c900"
   },
   "shareid": "06bcfdbe7e0d2cbb",
   "req_time": 1701315426
  }
 ]
}

Response

{
 "jsonrpc": "2.0",
 "id": 1,
 "result": {
  "return": "0"
 }
}

---

List shared files

user_requestListShare

Parameters

name	type	comment
page	number	the list is paginated. Page number start from 0.
req_time	number	the epoch time when this request is made
signature	object	signature on this message

Object signature

name	type	comment
address	string	wallet address of the user account
pubkey	string	public key of wallet address
signature	string	signed on a message 23

Returns

name	type	comment
return	string	negative: errors; "0": success; other values: invalid
fileinfo	array	list of shared files

In fileinof, these objects are included

name	type	comment
filesize	number	size of the file, in byte
filehash	string	file hash to identify the file 1
filename	string	name of the file
linktime	number	unix epoch time when the file started being shared
linktimeexp	number	unix epoch time when file share is expired
shareid	string	a uniq identifier for this sharing
sharelink	string	the link for accessing this shared file

Example

Request

{
 "jsonrpc": "2.0",
 "id": 1,
 "method": "user_requestListShare",
 "params": [
  {
   "signature": {
    "address": "st144ykkar9fhl8khs7lwz0s7py9vj4w9adp37kt9",
    "pubkey": "stpub1q0ska45w724dy0n0jujuqcvn2c80fa9c69dth0v9flacxrxp7w2rsncclps",
    "signature": "e176392ac2d195d0e5b1510463ce1d2a13c338b5ed7311e5da9f2252de39c4f91ab4444f0bb24fb8ea77fd33ef972706cc7945adbf9580f77cedbac65df03ea701"
   },
   "page": 0,
   "req_time": 1701315596
  }
 ]
}

Response

{
 "jsonrpc": "2.0",
 "id": 1,
 "result": {
  "return": "0",
  "fileinfo": [
   {
    "filehash": "v05ahm51buqelg70rjmcbqtn2qijc7um0ds1oedo",
    "filesize": 10000000,
    "filename": "file2_10M_jan20",
    "linktime": 1675051834,
    "linktimeexp": 1675055434,
    "shareid": "23929411ce338824",
    "sharelink": "udixcc_23929411ce338824"
   },
   {
    "filehash": "v05ahm51buqelg70rjmcbqtn2qijc7um0ds1oedo",
    "filesize": 10000000,
    "filename": "file2_10M_jan20",
    "linktime": 1675051919,
    "linktimeexp": 1675055519,
    "shareid": "76d88022afb10203",
    "sharelink": "OqhU3X_76d88022afb10203"
   },
   {
    "filehash": "v05ahm51buqelg70rjmcbqtn2qijc7um0ds1oedo",
    "filesize": 10000000,
    "filename": "file2_10M_jan20",
    "linktime": 1675051426,
    "linktimeexp": 1690603426,
    "shareid": "9025a905e28fe791",
    "sharelink": "UfBayn_9025a905e28fe791"
   }
  ],
  "totalnumber": 3
 }
}

---

Download a Shared File

There are for methods to be used to download a shared file.

• user_requestGetShared: get information of shared file
• user_requestDownloadShared: similar to user_requestDownload method for downloading a file, start downloading the shared file
• user_downloadData: same method used for downloading a file, downloading a piece of file data
• user_downloadedFileInfo: same method used for downloading a file, requesting file verification

user_requestGetShared

Parameters

name	type	comment
sharelink	string	link for accessing this shared file
req_time	number	the epoch time when this request is made
signature	object	signature on this message

Object signature

name	type	comment
address	string	wallet address of the user account
pubkey	string	public key of wallet address
signature	string	signed on a message 23

Returns

name	type	comment
return	string	negative: errors; "4": got shared file info; other values: invalid
reqid	string	to identify download instances when multiple download happen at same time
filehash	string	file hash to identify a file
sequencenumber	string	a sequence number to be used in uploading a file

Example

Request

{
 "jsonrpc": "2.0",
 "id": 1,
 "method": "user_requestGetShared",
 "params": [
  {
   "signature": {
    "address": "st144ykkar9fhl8khs7lwz0s7py9vj4w9adp37kt9",
    "pubkey": "stpub1q0ska45w724dy0n0jujuqcvn2c80fa9c69dth0v9flacxrxp7w2rsncclps",
    "signature": "3e43680bb6b801a7847652aaaddf0efeda6f3c73382b1a4aea63388b1f17fe9468998172e5b00fbeb8e5c6f3d35ecfe02d4101dca17628423518e69b29a5470100"
   },
   "sharelink": "eozCrm_014cc2f5388a911c",
   "req_time": 1701315818
  }
 ]
}

Response

{
 "jsonrpc": "2.0",
 "id": 1,
 "result": {
  "return": "4",
  "reqid": "31d1e975-cd8b-4631-8185-bee592ca3e34",
  "filehash": "v05j1m571efv3vuk3tq7airrfglanjvts4jrd4l8",
  "sequencenumber": "SN:0000000000000000001"
 }
}

user_requestDownloadShared

Parameters

name	type	comment
filehash	string	file hash to identify a file 1
reqid	string	the same reqid get from response of user_requestGetShared
req_time	number	the epoch time when this request is made
signature	object	signature on this message

Object signature

name	type	comment
address	string	wallet address of the user account
pubkey	string	public key of wallet address
signature	string	signed on a message 23

Returns

name	type	comment
return	string	negative: errors; "4": got shared file info; other values: invalid
reqid	string	to identify download instances when multiple download happen at same time
offsetstart	number	the offset of beginning of the piece of file data, inclusive
offsetend	number	the offset of end of the piece of file data, exclusive
filename	string	the name of the file
filedata	string	data of the piece of the file 4

Example

Request

{
 "jsonrpc": "2.0",
 "id": 1,
 "method": "user_requestDownloadShared",
 "params": [
  {
   "filehash": "v05j1m571efv3vuk3tq7airrfglanjvts4jrd4l8",
   "signature": {
    "address": "st144ykkar9fhl8khs7lwz0s7py9vj4w9adp37kt9",
    "pubkey": "stpub1q0ska45w724dy0n0jujuqcvn2c80fa9c69dth0v9flacxrxp7w2rsncclps",
    "signature": "2b68b0d3ddc981ba8b7e366e90901fe57cd1ef7b3caea4afb0eb8588b3025fe843c35ddf26ecf1a0cece5d48c633c7b9cd84c6311452d0e1c075f5ab030e773600"
   },
   "reqid": "31d1e975-cd8b-4631-8185-bee592ca3e34",
   "req_time": 1701315818
  }
 ]
}

Response

{
 "jsonrpc": "2.0",
 "id": 1,
 "result": {
  "return": "2",
  "reqid": "e59fb32c-0579-4762-9edf-89f71a17a60b",
  "offsetstart": 0,
  "offsetend": 3145728,
  "filename": "test_10m",
  "filedata": "xfYRzYszM+NbWW/nZJZqmI8W9aGlaFt7SBkkuL5nkx/5LGjc9aKNXsyNxloYrgs30B4KmG2uDZWvS803FPxjzbOHvs7dNu3ZZQxf7yrKeDxQB1lL2n ... "
 }
}

user_requestDownloadData

Please see same method under section Download a File

user_downloadedFileInfo

Please see same method under section Download a File

---

Get Ozone Balance

user_requestGetOzone

Parameters

name	type	comment
walletaddr	string	wallet address of the user account

Returns

name	type	comment
return	string	negative: errors; "0": got shared file info; other values: invalid
ozone	string	value of ozone balance
sequencynumber	string	a sequence number to be used in uploading a file

Example

Request

{
 "jsonrpc": "2.0",
 "id": 1,
 "method": "user_requestGetOzone",
 "params": [
  {
   "walletaddr": "st19nn9fnlzkpm3hah3pstz0wq496cehclpru8m3u"
  }
 ]
}

Response

{
 "jsonrpc": "2.0",
 "id": 1,
 "result": {
  "return": "0",
  "ozone": "999951054180",
  "sequencynumber": "SN:0000000000000000001"
 }
}

---

1. filehash uses Keccak-256 ↩↩↩↩↩↩↩

2. the message for signature is [file_hash] + [walletaddr], e.g. the string of "v05ahm52b88i4lh1epel0cmce6606duatmml4o48st19nn9fnlzkpm3hah3pstz0wq496cehclpru8m3u" when file hash is "v05ahm52b88i4lh1epel0cmce6606duatmml4o48" and wallet address is "st19nn9fnlzkpm3hah3pstz0wq496cehclpru8m3u" ↩↩↩↩↩↩↩↩

3. after getting signed, the signature bytes are encoded into hex string. ↩↩↩↩↩↩↩↩

4. data is encoded using standard Base64 as defined in RFC 4648. ↩↩↩↩

5. smd://[owner wallet address]/[file hash] ↩