Read content from chain

To access content stored on-chain, use the payload_transaction_id returned when the content was uploaded. If the content is encrypted, provide the password or AES key in the options.

import {BlocknoteReader} from "blocknote" 

const options = {};
const reader  = new BlocknoteReader(
    "7VR62WIMCSA5POMS2QAY64SMKW5GBTN2WCBTNA5H4W3WFMYLFHWQ",
    options   
);

reader.read().then((response) => {    
    console.log(response);
});

View a response example

{
  payload: {    
    title: 'Sales report 2025',
    mime: 'application/pdf',
    size: 19851,
    addid: 260321436,
    accid: 1583377570,
    compression: 'brotli',
    txns: 16
  },
  content: <Buffer 25 50 44 46 2d 31 2e 34 0a 31 20 30 20 6f 62 6a 0a 3c 3c 0a 2f 54 69 74 6c 65 20 28 fe ff 00 4d 00 61 00 72 00 6b 00 64 00 6f 00 77 00 6e 00 20 00 54 ... 19801 more bytes>
}

Constructor

Name	Description	Type
payload_transaction_id	The payload_transaction_id of the upload to read	string
options	See the options table below	object

Options

Name	Description	Type	Default
password	The password to decrypt the content if required.	string
aes_key	The AES key to decrypt the content if required.	string
revision	Read a previous revision. The last revision is read by default.	number
return_raw	Returns the raw on-chain content, preserving any applied compression or encryption. aes_key and password are ignored.	boolean	false

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Methods

read

Return

A promise that contains the payload and the content as a buffer.

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getRevisions

Return

The number of available revisions.