MultiChain Developer Q&A - Recent questions tagged hash

Transaction ID hash

Tue, 25 Mar 2025 09:10:33 +0000

Which values, if any, are input into the transaction ID hash?

About custom Hash

Thu, 15 Aug 2024 17:39:15 +0000

Hi~

In a scenario where a blockchain is running on embedded devices with performance constraints, I would like to inquire if there is an API or any other method available to customize my own hash function for creating a txid when uploading data to a stream.

Thanks : )

Where i can find previous block for any blockhash

Thu, 16 May 2019 12:51:27 +0000

Where i can find previous block for any blockhash

how blocks in network are linked to each other ?Does the previous block contains the hash of the current block ?

Tue, 05 Feb 2019 09:54:39 +0000

decode data hash

Tue, 08 Jan 2019 12:59:23 +0000

Hello guys ,
I am using getwallettransaction txid to fetch particular transaction details so i want to convert value of data in string so it is giving me unreadable string format......please let me know how can i decode and read data?

getwallettransaction 0e5b03efb67984966095dd929d23723f77074414786a594ac65c7404deca01f4
{"method":"getwallettransaction","params":["0e5b03efb67984966095dd929d23723f77074414786a594ac65c7404deca01f4"],"id":1,"chain_name":"Rapidchain1"}

{
"balance" : {
"amount" : 0.00000000,
"assets" : [
]
},
"myaddresses" : [
"1aeRDR8jgKinQditYrujNRCaSzWb4napwHS29V"
],
"addresses" : [
],
"permissions" : [
],
"items" : [
],
"data" : [
"53504b62473045022100e7b19d958d3ce901b3ff52f5049f10d62f4cf49ad3f032a7c78dc2f465c5b2af02202b64b7f366ddd6a087546fed204b9c35ee86912e6e6a2492e66988be995948e002210258b366ca791ff59a1f3ef6ada216faa85b2d4973167996d05b593bf934e3b8c2"
],
"confirmations" : 172,
"generated" : true,
"blockhash" : "00a2879445a885bc9f46b1a2faa49f693c0212eef47790f165e82e69b84b88e9",
"blockindex" : 0,
"blocktime" : 1545033454,
"txid" : "0e5b03efb67984966095dd929d23723f77074414786a594ac65c7404deca01f4",
"valid" : true,
"time" : 1545033454,
"timereceived" : 1545033454
}

Get hash from items

Tue, 08 Jan 2019 10:41:29 +0000

Hello,

I should create a project based on multichain that allow you to add a file and later check if the file has been modified with a hash check. How can i do that? There is a way to get the hash of a data?

Thanks.

How does data stream affect the hash?

Thu, 29 Nov 2018 00:10:25 +0000

Hi,

When I add data to data streams, does that information also go into the hash of the block that the stream is published?

What part of MultiChain would you change to change the hash algorithm?

Thu, 11 Jan 2018 20:42:04 +0000

If I am modifying MultiChain's source code to change the hash algorithm and create a custom version for myself, what part would I change?

How do you specify security algorithms?

Thu, 11 Jan 2018 01:33:13 +0000

How do you specify, for example, you want transactions to be hashed using SHA3-512?

Where are the hashes stored

Mon, 10 Jul 2017 16:04:24 +0000

The transaction that i do from one node to other are blocks. So where do i see these blocks or hashes actually getting chained ? Is there some file or so

Also I am doing a transaction from no where,I create an asset named dollar and transfer any amount to other node, how do i link to a database and check if there is any is any fund to transfer to other node and it gets reflected in the database where the amount is debited and credited from one account to other in form of data ?

Could provide with the help

How can i store file's hash in multicain

Mon, 27 Jun 2016 09:41:30 +0000

I want to create a blockchain where each user can store the hash of files, and everyone can check if a certain hash exists in the blockchain.
In order to acheive that i did some research and found that OP_RETURN allows users to assign metadata to transcations.

Is it correct to use this method or is there any alternatives (I'm new to the blockchain world)?

can someone tell me the command line to use?

How to store data on MultiChain - 101

Fri, 13 May 2016 15:33:45 +0000

Hi,

I am very new to MultiChain and have worked my way through the getting started tutorials. I want to be able to test MultiChain for two scenarios:

1) Hash an existing file (for example a csv file) and store that transaction on the MultiChain

2) Store an existing file (same CSV file) encrypted into the MultiChain

Would someone be kind enough to point me in the right direction, apologies if this seems a very basic question.