Questions tagged [blockchain]

Questions about blockchain in general, when other tags cannot quite capture the essence of the question.

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Do I need to verify data signed with Nami wallet or will the cryptography algorithms automatically detect if it was tempered with?

Based on this answer which seems to have some bugs in the verification methods I created this piece of code: const { Address, Ed25519Signature, PublicKey, BaseAddress, StakeCredential, ...
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4 votes
3 answers
577 views

What does it mean when a block with 0 transactions is appended to the blockchain?

E.g. this block has 0 transactions Is there any technical/ strategic reason for appending such a block to the blockchain? To make my question more explicit: Why is the block created despite there is ...
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2 answers
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Where can I find the max block size in the protocol parameters?

I know the actual block size is 88KB but I can't find this value in the protocol parameters. I have ran this command in Testnet and got the following: $ cardano-cli query protocol-parameters --testnet-...
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3 votes
3 answers
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What is Layer 0?

Someone told me that in a previous video Charles said cardano has the best layer 0. Did he mean Layer 1 or was this intentional? Either way, what is a layer 0? And how do you interface with it from ...
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how i send cardano native tokens from one wallet to another in unity?

I need little help from you guys. how can I send Cardano native tokens from one wallet to another in unity?
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in plutus-pioneer-program iteration 3 not able to use --required-signer-hash in grab.sh so causing beneficiary's signature missing error (if remove)

Invalid option `--required-signer-hash' Usage: cardano-cli transaction build [ --byron-era | --shelley-era | --allegra-era | --mary-era | --alonzo-era ] [ --shelley-mode | --byron-mode [--epoch-slots ...
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2 votes
2 answers
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How to architect a truly decentralized dApp on Cardano?

I have been doing some research on how to properly design and architect a dApp solution on Cardano and came across this nicely, written article (albeit on Ethereum) The Architecture of a Web3.0 ...
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2 votes
1 answer
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Higher than needed transaction fees

Let's say I have a transaction that I manually altered to include transaction fees that are higher than the required amount of fees. The transaction is perfectly balanced and, apart from this, does ...
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2 votes
1 answer
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How does Mithril increase Cardano network throughput?

Charles talks about Mithril as a means to light client wallets. My understanding of mithril is it takes a screenshot of sorts of upcoming blocks and by representing the blocks in a lighter manner for ...
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2 votes
2 answers
85 views

How can I register a document on the cardano blockchain? Does it have cost?

I want to adopt cardano blockchain as a proof of existence and authenticity of documents on my job. How can I do that? Making some research I found cardano CFC but I am not sure if is working already ...
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To achieve consensus, are both of the following constraints: Validity AND Strong Validity, required to be satisfied? If so, why?

Preface: I have been working my way through various materials related to blockchain protocols (amongst other things). My primary motivation is to gain a fundamental understanding of how these systems ...
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How can I get access to the epoch nonce?

I see the Cardano epoch nonce being used as a source of randomness. How can a non-technical person verify if the nonce used is actually legitimate? Is there a source where I can find the nonce for a ...
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3 answers
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how can i show my minted NFT images on cardano testnet

this my minted nft address https://testnet.cardanoscan.io/transaction/38415ba47ba757b5ccb7240962fc064be56850b19f820e9a837aeed6e56e8081?tab=utxo Now i wants to show these minted NFT Images to any ...
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0 votes
1 answer
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Advantages and data load sharing of blockchain tech for consumer applications

I want to have an application developped (for on pc) and actually I have several questions about blockchain advantages for this purpose and more. My blockchain of preference is naturally, Cardano. I'm ...
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2 answers
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Build transaction script ERROR in cardano .Not support the policyid with tokenname

this is my transaction build script cardano-cli transaction build --mainnet --alonzo-era --tx-in $txhash#$txix --tx-out $address+$output+"$tokenamount $policyid.$tokenname" --change-...
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Is there an established pathway yet for someone with a purely mathematical background to become a fully equipped Cardano developer? If so, what is it?

Title asks my question. I have a mathematics degree (undergrad) and have dipped a toe in the water of software development in Python, but have no clue where the optimal place to start to become an ...
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2 votes
2 answers
1k views

How to move Daedalus's blockchain data folder out of AppData?

I'm a newbie with Cardano. Anyone can tell me how to move the Daedalus blockchain data folder from AppData to another drive? I want to keep my C-drive's space by moving DB to another drive.
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Error while decoding the protocol parameters

This is occurring on testnet. Trying to calculate a fee for a transaction that will include metada. Here's the script: cardano-cli transaction calculate-min-fee \ --tx-body-file tx.draft \ --...
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6 votes
2 answers
272 views

How to publish a smart contract on the blockchain?

Let's say I have a Plutus contract written up. How do I actually submit it to the blockchain and start interacting with it?
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3 votes
0 answers
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Is there a "Moore's law" type function, that has been fitted to the Cardano blockchain size as a function of time?

In technology, when something is growing quickly and monotonically over time, we often fit the data over time to a curve and make claims like "the doubling time of the number of transistors in a ...
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5 votes
2 answers
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What is the size limit of transaction's metadata?

Is there a size limit on transaction metadata? If there is a limit, is it varying or fixed size?
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4 votes
2 answers
995 views

Is there any platform to read the Mempool?

I want to see the queued transactions in the mempool, where can I see that? Thank you.
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3 answers
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Could BTC migrate to Cardano?

According to research by the University of Cambridge, the Bitcoin network currently consumes around 100 terawatt-hours of electricity annually, enough to run a country such as Sweden. The second ...
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2 votes
1 answer
211 views

Mainnet – How to fix a frozen DB syncing?

I've been trying to sync with the Cardano blockchain in order to use CLI wallet on macOS Big Sur 11.6. But syncing is frozen at epoch 289 on block 6,236,059. cardano-cli query tip --mainnet { &...
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Validating transactions

Original question: When 51% or more of consensus participants validate any transaction for recording on-chain, against what evidence are they validating? Original Answer: Each transaction is broadcast,...
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Data and metadata protection

Original question: Where is confidential data held and how is access to it controlled? response: It depends on the context, but if you include metadata in a transaction, those metadata will be ...
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3 votes
1 answer
172 views

Any update on RINA?

Recursive Interconnect Network Architecture was being discussed for Cardano. Is the networking team or anyone looking into this?
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3 votes
1 answer
195 views

Historic and Real-Time Data on Cardano Blockchain in csv or json format

I am conducting some research on Cardano and would like to know if there's any historic and real-time information (on daily basis or more granular) for the below area in json or csv format: (1) Number ...
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8 votes
6 answers
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What happens if someone gets my seed phrase?

If someone happens to get my seed phrase (off a paper I wrote it on) can they restore my Daedalus wallet on another machine and take my ADA?
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5 votes
6 answers
1k views

How to verify data signed with nami wallet in a node backend?

I am playing around with the nami cardano wallet. I am able to link the wallet in the frontend and now want to link it to the backend. First action the frontend sends an auth request with the cardano ...
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8 votes
4 answers
211 views

Will Hydra (or anything else) reduce transaction times for Cardano in the future?

It's been brought to my attention that Hydra will offer all the scaling necessary but will it also make the blockchain faster? Is it likely Cardano will ever reach an under 10 second time which could ...
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1 vote
1 answer
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Questions about data storage and unique identifiers

Hi there I have a number of questions i hope you can help answer: Who binds the public key to the real-world identity and the identifier used for transactions? Where is confidential data held and how ...
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6 votes
1 answer
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How are identities verified on Atala Prism?

I assume as an adult I can get an atala verified identity rather easily, but if a minor wants an identity on atala (for example, to play blockchain games) how is that done? What information/...
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4 votes
3 answers
241 views

How to check using CLI that a token is a NFT?

One can check with online tools (described here) if a token is an NFT. How the same thing can be done using CLI tools (in some sort of a script)?
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2 votes
1 answer
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Researching potential smart contract use in streamlining spare parts supply chain

I'm researching the potential for blockchain smart contracts to be utilized for streamlining order fulfillment against requirements contracts; and possibly other contracting/acquisition uses. By way ...
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1 vote
2 answers
127 views

How to permanently persist an arbitrary hash string in the blockchain?

I have an interesting use case for permanently storing an arbitrary hash string somewhere "reliable" publicly and, very important, with a trustworthy timestamp. For me, this sounds like a ...
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7 votes
1 answer
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Are digital assets stored on personal devices or on the blockchain?

I keep my ADA on Daedalus. I keep my seed phrase on a piece of paper, stored somewhere at home. Say the computer where I have Daedalus suddenly dies tomorrow, and becomes inaccessible and irreparable. ...
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6 votes
3 answers
368 views

Is there anyway to cancel payment or revert a payment

Recently I came across a situation: a payment was executed by a customer on a site but then the consumer changed his mind. What levels of transaction revert of such activity can be done? e.g. X ...
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5 votes
1 answer
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How can we verify the 45B ada cap cannot be exceeded?

Is there a particular place in code that forbids exceeding this market cap? Should we be constantly keeping an eye on it after IOHK hands off the project to the community? Or is it somehow imbued in ...
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3 votes
1 answer
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Identifying node locations by region

I want to operate stake pool nodes in underserved areas. My cloud provider automatically chooses the cheapest datacenter nearest to me. But I am willing to pay more to deploy to data centers in ...
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4 votes
1 answer
79 views

what is the ADA (Cardano crypto-currency) SDK?

I'am very new to the blockchain community and I have a new project that i'am starting to work on using the Cardano Blockchain and its crypto ADA. I stumbeled upon the name "ADA SDK" and I ...
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5 votes
1 answer
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How are staking rewards stored?

In another question Andrew Westberg mentions that staking rewards are not stored as UTxOs to save space on the blockchain. My question is: how exactly are those rewards associated with one's stake ...
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7 votes
1 answer
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How are the key parameters that control Cardano governed?

I am looking to understand the 7 special keys that control all the parameters for cardano. How it's controlled, who gets to control it, and what each parameter means.
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7 votes
3 answers
248 views

What are technical differences in smart contract execution on Cardano in comparison to Ethereum?

In my understanding, smart contracts on Cardano are always provided to the blockchain via a transaction and there is no code that is stored at the blockchain, but just a hash (the public key address). ...
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9 votes
2 answers
349 views

What are the long term micro-transaction plans for Cardano?

I've seen the broader implications of throughput that layer 2 solutions like Hydra will provide for the ecosystem. But I'm curious about how the Cardano ecosystem will provide cost effective solutions ...
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4 votes
1 answer
104 views

Are there plans to keep the blockchain/node size small enough to maintain decentralisation?

One issue bitcoiners like to mention is node size in relation to decentralisation. Currently we are at like 10gb, I saw that the max growth is apparently 100gb a year. Are there any plans for reducing ...
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12 votes
2 answers
676 views

Why is PoS much faster than PoW?

My understanding of the topic is this: Proof-of-Work Miners compete with their hashrate for the right to publish a block. Proof-of-Stake Validators are randomly elected to validate a block. Why is ...
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6 votes
1 answer
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A summary on the goal of Cardano

On the website it's mentioned that: Cardano is a blockchain platform for changemakers, innovators, and visionaries, with the tools and technologies required to create possibility for the many, as ...
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11 votes
1 answer
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How does the hardfork combinator work?

Naïvely one would think it's a mere version tag on the block. However, most other chains do not include a combinator. How does it work at the low level and why only Cardano has it?
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10 votes
1 answer
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How does Cardano compare with other blockchains in terms of being eco-friendly?

It is pretty common knowledge now that Bitcoin is extremely energy intensive to mine, and that Cardano is several orders of magnitude less intensive. However, there are other cryptocurrencies that are ...
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