Questions tagged [tangle]

For questions about the tangle, the directed acyclic graph which has the same function in IOTA as the blockchain has in other cryptocurrencies.

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What is the difference between Reality-based UTXO ledger and Voting DAG

I was reading the paper Tangle 2.0, which explains the recent research advancement in the protocol. I understand the fact that UTXO ledger can have conflicts and these conflicts are resolved by ...
Syed Muhammad Danish's user avatar
1 vote
1 answer
9 views

Private Tangle spawns unissued messages

I set up my own private tangle and it works well. Then I shut down the spammer in order to control the messages issued, anyway, there are messages with indexation payload emitted periodically and I ...
Matteo D'Onofrio's user avatar
1 vote
1 answer
71 views

persisting UTXO metadata

thanks to this topic, I understand that I have to take in consideration Shimmer -and not the actual IOTA mainnet- in order to store data inside transactions permanently. My concern is about ...
keuzzolo's user avatar
2 votes
1 answer
89 views

Data block persistence

I'm developing an application that writes data block inside the Tangle on the IOTA Mainnet. I need that the data blocks persist in time, without loosing them. I recently discovered (thanks to a Iota ...
keuzzolo's user avatar
1 vote
1 answer
51 views

IOTA Streams project still supported?

I discovered the https://iot2tangle.io/hub.html webpage. I tried to set up a project from the page using the STM32_B-L475E-IOT01A BLE project https://github.com/iot2tangle/STM32_B-L475E-IOT01A/tree/...
Milo's user avatar
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1 vote
0 answers
29 views

What determines the time a message is included in the IOTA Tangle?

I have a Hornet node connected to the IOTA network. In turn, from my own node I'm sending different messages over the Streams protocol. The propagation times I get give me no clue about why some ...
user5291's user avatar
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1 vote
0 answers
11 views

Access the Explorer from my application

In my application, I need to do some regular checks into the Tangle Explorer. I wonder if it's possible to access the Tangle Explorer directly from my application code, in order to automate the checks ...
Matteo D'Onofrio's user avatar
2 votes
1 answer
67 views

Transactions vs Messages

I'm reading the IOTA documentation, but I'm still having a doubt: is the Tangle a graph where each vertex is a transaction or is each vertex a message? Thanks.
Matteo D'Onofrio's user avatar
2 votes
1 answer
14 views

Implement a variation of the IOTA Tangle?

I'm a newbie on the IOTA Tangle, I understood the main functionalities and read the documentation regarding the different implementations. I'd like to know if exist some libraries allowing you to ...
Matteo D'Onofrio's user avatar
1 vote
2 answers
33 views

Why nodes are still unconfirmed with two tips?

As per the understanding, to issue a new transaction, we need to validate 2 unconfirmed transactions called tips, and then we can append a new transaction to those transactions, adding 2 new edges to ...
bolar's user avatar
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1 vote
1 answer
31 views

WASP Chain Setup TCP Connection Refused Error

I am trying to setup a WASP Chain to test deploy a EVM smart contract. However, I try to wasp-cli request-funds or wasp-cli chain deploy I am getting a dial tcp connect:connection refused error. This ...
Tyler Choi's user avatar
0 votes
1 answer
63 views

Questions / confusing sentences in IOTA White Paper

Question 1: this is the paragraph It is important to observe that we do not impose any rules for choosing which transactions a node will approve. Instead, we argue that if a large number of nodes ...
khunachik's user avatar
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1 answer
96 views

How to send a data payload of a size 1 MB or greater with MAM and node.js?

I know MAM is deprecated but I am doing some research on MAM. I was able to send and fetch a data payload of size 740 KB. But when I tried to use a data of 1 MB I am getting this issue with node.js ...
Pranav's user avatar
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3 votes
0 answers
137 views

Is IOTA byzantine fault tolerant?

Is there mathematical proof that IOTA is byzantine fault-tolerant?
michael's user avatar
  • 31
1 vote
1 answer
59 views

How to send a transaction in private tangle Hornet of IOTA?

I have deployed an IOTA tangle network on Hornet and it is running successfully on http://localhost:8081/. How do I send a transaction to it? Are there any steps or could you please share any ...
Akhil Kintali's user avatar
1 vote
1 answer
44 views

Should a stable coin be implemented as colored coin or in a contract?

The advantage of a stable coin being a colored coins is that it is live on the tangle and does not sit within a contract. Whereas the shortcoming is that you cannot add more if it. The amount is fixed....
user avatar
2 votes
1 answer
27 views

Is/was it difficult to implement colored coins?

To me it looks like colored coins just have additional information stored. It sounds like a struct that has an additional variable. There's probably more to it, I did not yet check that in the source ...
user avatar
2 votes
2 answers
141 views

What's the advantage of colored coins compared to ERC20 tokens?

It's incredible how easy it is to create colored coins on the current devnet. That's amazing! And those coins are treated just like normal iotas. Has any other chain accomplished to publish colored ...
user avatar
2 votes
1 answer
89 views

Unknown value in milestone payload

I'm exploring the following milestone message. And I'm using the following RFC: 0019-RFC From the message, I've identified almost every element, but there is one that is not referenced in the ...
user5291's user avatar
  • 164
3 votes
1 answer
110 views

Values in message structure do not match RFC message structure

I'm trying to understand what is the structure of the messages in IOTA. I used scylla to download some messages and now I don't see that the structure from the message matchs with the current one ...
user5291's user avatar
  • 164
3 votes
1 answer
49 views

How can I analyse some tangles generated in the mainnet to compare with synthetic ones generated using a simulator?

I’m a researcher I’m trying to analyse some tangles generated in the mainnet to compare with synthetic ones I generated using a simulator I have hard time understanding how to get a database. I’ve got ...
Antonio Nardella's user avatar
2 votes
0 answers
49 views

How to get the bundle hash or tail transaction hash by using the prepare_transfer() and send_trytes methods?

I am sending data to my hornet private tangle in Python. I wanted to do separate api calls to prepare the transaction and publish the transaction. So, I used api.prepare_transfer() and api.send_trytes(...
Pranav's user avatar
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1 vote
1 answer
67 views

What is the state tracking approach in IOTA IRI?

It is important to keep track of the state, e.g., in order to perform verification of transactions. While it is possible to reconstruct the most updated state by starting from the initial state and ...
MHT's user avatar
  • 31
0 votes
1 answer
36 views

What is the address of a restricted channel in Masked Authenticated Messaging (MAM)?

I have read many research papers, articles and the iota documentation. However, I am still confused whether the address for restricted mode is hash(merkle root) or hash(side_key + merkle root) Please ...
Pranav's user avatar
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1 vote
1 answer
159 views

How to publish messages using MAM to my private tangle?

I have a private tangle with 2 hornet nodes. I tried MAM using one of the devnet nodes by following the example on the official IOTA webpage. Can someone please tell me how do I publish and fetch ...
Pranav's user avatar
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1 vote
0 answers
57 views

Merkle tree cannot be calculated in hornet

I am trying to calculate merkle tree using the below command:sudo -u hornet COO_SEED="$YOURSEED" hornet -d $HORNETPATH tool merkle. I am getting an error like:sudo: unknown user hornet and ...
KISHPDLK's user avatar
0 votes
1 answer
81 views

Tangle : Algorithm to determine if a transaction is valid or not

A node needs to verify that all transaction that it receives are valid before adding it to its local copy of tangle. For this we would need an algorithm which given the cone of this transaction would ...
Sarthak123's user avatar
0 votes
0 answers
26 views

Accessing JSON message from IRI node API using Python 3

I am using one command tangle. The tangle is running on Ubuntu machine. From the list of APIs given for IRI node, I'm trying to broadcast a transaction. For this, the first step is to get ...
degr8sid's user avatar
0 votes
0 answers
55 views

Connection to private node (one command tangle) refused

I have created a one command tangle from this link: https://docs.iota.org/docs/utils/0.1/community/one-command-tangle/overview And using API given here: https://docs.iota.org/docs/node-software/0.1/...
degr8sid's user avatar
3 votes
1 answer
120 views

Using Public Nodes in IOTA Tangle for testing purpose

I want to send some string data using MAM over IOTA Tangle. Right now, I am using devnet. I want to know how can we test our transactions using public nodes on Mainnet? What is the process for it? I ...
degr8sid's user avatar
0 votes
1 answer
41 views

I can't work out how to get TangleID to work

So im trying to get tangleID to work to use it on a project. I am using this project. https://github.com/TangleID/TangleID But everytime I try and run the code i get an error message of "Mam.init is ...
icehazard's user avatar
2 votes
1 answer
90 views

How long do Zero Value Transactions last?

Let s say we have some critical information stored as Zero Value transactions on the Tangle. How long does it last? Which robust approaches do you recommend to keep a copy of those transactions? I ...
UserK's user avatar
  • 177
0 votes
1 answer
49 views

Is it secure to enter your seed in a browser form to publish data to IOTA Tangle?

I am trying to publish my data on IOTA Tangle using MAM. For this, I have designed a web form where I have to enter my seed and press the publish button. The actual data is fetched from firebase ...
degr8sid's user avatar
-1 votes
1 answer
39 views

is tangle (IoTA) Depth-first search or Breadth-first search?

There is several of algorithms for topology sorting for DAG. What is algorithm used by tangle for search, is it Depth-first search or Breadth-first search or is there another method?
Istabraq Mahmood's user avatar
0 votes
1 answer
24 views

Edit MAM stream already implemented on Tangle

For my project, I have created a web interface on which I'm viewing a published MAM stream. I want to know that is it possible to edit or add new record to MAM stream that has already been published ...
degr8sid's user avatar
0 votes
1 answer
52 views

Error in neighbors list on IoTA full node iri-playbook

I have install iri-playbook but when I want to show my neighbors list using this command nbctl -l it shows this error: ERROR: Error response from node: code 500, response: '{"exception":"port out of ...
Istabraq Mahmood's user avatar
1 vote
1 answer
28 views

How is Tangle Quantum Immune? [duplicate]

I was going through the iota tangle documentation and features and found one of the feature mentioned as Quantum Immune , so basically looking for resources to understand the quantum immune property ...
asing177's user avatar
  • 111
2 votes
2 answers
88 views

How is a MAM stream implemented on the Tangle?

What I am wondering is how the Merkle tree for a MAM stream is implemented in the Tangle. Is each set of new data in the stream basically a "leaf", and considered a separate transaction on the Tangle ...
W. Churchill's user avatar
0 votes
2 answers
35 views

How do transactions reference each other in the Tangle?

How do transactions reference other transactions in the Tangle, is it through the Merkle root, or signature message fragment? And how can you make a transaction reference another chosen transaction. ...
W. Churchill's user avatar
1 vote
1 answer
62 views

Why is the async function not working while fetching MAM data?

I am making a simple MAM publish and fetch script. The first script is mam_publish which publishes the data. The other script is mam_receive which fetched the already published data. Now, the ...
degr8sid's user avatar
0 votes
2 answers
66 views

How do I know MAM data has been published?

I am running a code to publish random data on Tangle via MAM. If I don't fetch the data at the same time, and I just want to confirm if it has been published on Tangle, how do I do that? Also, is it ...
degr8sid's user avatar
3 votes
1 answer
153 views

How to send Health Data to Tangle via MAM?

I am trying to make a project to send Health data from my phone to Tangle via MAM. For this purpose, I have made a sample file that publishes sample health data to Tangle. When I am running the code, ...
degr8sid's user avatar
1 vote
0 answers
34 views

what is the Mathematical principle of the tangle

how do i get the probability of the douple-spending?
user3629's user avatar
1 vote
2 answers
134 views

What is the correct way to write "Hello, World!" to the tangle?

How would a simple program look like, that, when run, writes the message Hello World to the tangle?
Kerry Macleod's user avatar
0 votes
1 answer
52 views

Is it possible to secure the data of an IOT idevice in an ICS by using MAM?

The idea is to add IOT devices to an ICS (industrial control system), send and retrieve the data of these devices through the tangle. The data will be sent through the IOT device using MAM and be ...
boxb's user avatar
  • 3
1 vote
0 answers
133 views

How can I get back my balance showing in my IOTA wallet?

I use IOTA Wallet Version 2.5.7 (2.5.7). I know I had 101.89800000 IOT in my wallet (my cointracking.info account confirms). I was able to log into my account, but my balance is showing 0. I tried ...
John Doe's user avatar
  • 111
0 votes
0 answers
117 views

IOTA and LoraWAN: Proof of Concept of storing data in the Tangle

I found an article here :(Link to the article) entitled "LoraWAN and IOTA: Proof of Concept of storing data in real time in the Tangle" , written by Harm van den Brink (IOTA foundation member). ...
Questioner's user avatar
3 votes
1 answer
234 views

How to install IOTA in a small device supports LoraWAN?

I found an article here :(Link to the article) entitled "LoraWAN and IOTA: Proof of Concept of storing data in real time in the Tangle". The thing is not clear to me is that if IOTA has been ...
Questioner's user avatar
1 vote
2 answers
142 views

How can the transactions in the Tangle be ordered temporally?

I do not understand how the IOTA Tangle DAG indicates by its structure the temporal order when two spends are on separate, independent, branches. It is possible that two transactions occur and are ...
user avatar
2 votes
1 answer
64 views

IOTA and Tangle relation

I used to think that IOTA is the cryptocurrency which uses the Tangle Direct Acyclic Graph. But today I spend some time on the IOTA official and there is no single appearance of the word "...
user2267's user avatar