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.

Filter by
Sorted by
Tagged with
2 votes
2 answers
100 views

Is IOTA byzantine fault tolerant?

Is there mathematical proof that IOTA is byzantine fault-tolerant?
28 votes
1 answer
2k views

What does the IOTA coordinator actually do?

We know that there is a coordinator, which helps to secure the network in order to prevent attacks in early stages of adoption. What does it do exactly, how does it work?
0 votes
1 answer
114 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 ...
0 votes
1 answer
43 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 ...
1 vote
2 answers
19 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 ...
1 vote
1 answer
148 views

Transfer from Multisig into normal address

I am following the example described here: https://github.com/iotaledger/iota.lib.java/blob/master/jota/src/test/java/jota/IotaMultisigTest.java I put funds into a multisig. Now I want to move that ...
1 vote
1 answer
20 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 ...
1 vote
1 answer
57 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 ...
0 votes
1 answer
48 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 ...
0 votes
0 answers
30 views

Where are the storage elements stored? Are all stored in rocksdb or some are stored as file?

We know that Bitcoin and Ethereum are storing their raw blocks as files in the system, and recording the recent states (utxo set in Bitcoin and world state in Ethereum) in leveldb. Is the storing ...
0 votes
0 answers
26 views

Where do I get the send and receive addresses of a private IOTA Tangle setup?

I am running a private Tangle Hornet node and am able to create transactions and retrieve data about them too. But, where do I get the send and to address of that transaction?
1 vote
1 answer
37 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....
1 vote
1 answer
42 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 ...
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 ...
2 votes
2 answers
132 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 ...
2 votes
1 answer
84 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 ...
3 votes
1 answer
109 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 ...
3 votes
1 answer
43 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 ...
2 votes
0 answers
33 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(...
25 votes
1 answer
2k views

Is it possible to send pictures to the Tangle? What is the data limit per transaction?

As we all know, it is easily possible to convert ASCII to trytes. See this converter in the IOTA github: Converter If I now want to convert a whole picture like one of the Iota logo to trytes, how is ...
0 votes
1 answer
34 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 ...
1 vote
0 answers
56 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 ...
0 votes
1 answer
79 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 ...
6 votes
1 answer
870 views

Extracting data from the tangle

The ownership distribution of Iota has been written about but how does one get these addresses? I looked at the Iota API and don't see an obvious way. And the tangle seems like some of it is in binary ...
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 ...
0 votes
0 answers
23 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 ...
0 votes
0 answers
48 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/...
3 votes
1 answer
85 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 ...
2 votes
1 answer
84 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 ...
2 votes
2 answers
84 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 ...
0 votes
1 answer
43 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 ...
18 votes
2 answers
380 views

Consensus - how is a single, non-conflicting graph (tangle) maintained?

In traditional blockchains consensus is maintained by proof of work such that the valid chain containing the most cumulative work is agreed to be the consensus chain. IOTA lacks blocks and ...
21 votes
3 answers
373 views

Consensus - what convergence properties does the tangle have when multiple conflicting transactions are built upon by different parts of the network

In traditional blockchains consensus is maintained by proof of work such that the valid chain containing the most cumulative work is agreed to be the consensus chain. IOTA lacks blocks and ...
-1 votes
1 answer
37 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?
0 votes
2 answers
63 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 ...
1 vote
1 answer
58 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 ...
0 votes
1 answer
22 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 ...
0 votes
1 answer
49 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 ...
1 vote
1 answer
27 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 ...
0 votes
2 answers
34 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. ...
1 vote
2 answers
126 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?
3 votes
1 answer
140 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, ...
1 vote
0 answers
33 views

what is the Mathematical principle of the tangle

how do i get the probability of the douple-spending?
6 votes
4 answers
2k views

Is double spending possible in IOTA?

It is mentioned in Tangle's white paper (technology behind IOTA) that From the above discussion it is important to recognize that the inequality λ > μ should be true for the system to be secure. In ...
0 votes
1 answer
49 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 ...
1 vote
0 answers
124 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 ...
4 votes
1 answer
213 views

Finding a double-spending inner conflict referencing two tips

I think that IOTA Transactions, Confirmation and Consensus is a very good reading. It helped me a lot on understanding IOTA protocol working. Nevertheless I have a doubt: regarding the Double Spend ...
1 vote
1 answer
108 views

IOTA network actual usage

My understanding is that IOTA is mostly useful to communicate data rather than to store data, given that the network undergoes periodic transaction pruning (snapshots). Is this correct? If so, is ...
0 votes
0 answers
114 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). ...
3 votes
1 answer
226 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 ...