Questions tagged [blockchain]
Questions about blockchain in general, when other tags cannot quite capture the essence of the question.
64
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How to query cardano blockchain related data like createwallet, getnewaddress, getbalance , sendtoaddress
I have done cardano node setup and sync it 100% And also install an cardano wallet using CLI. Now I want to interact with cardano using node js, can someone please tell me how we can do basic ...
0
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12
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(Failed to build scrypt-0.5.0. The failure occurred during the configure step.)
Getting erro rwhile doing "cable build all".
OS
Your OS:
Distributor ID: Ubuntu
Description: Ubuntu 22.04.3 LTS
Release: 22.04
Cable version :
cabal-install version 3.6.2.0
compiled using ...
0
votes
1
answer
33
views
Dandelion graphQl endpoints not working?
I'am was trying to use these endpoints to use playground of cardano graphQL ( https://graphql-api.mainnet.dandelion.link/ ) and (https://graphql-api.testnet.dandelion.link/) but none is working, they ...
- 61
1
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0
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22
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What's the benefit of headers-first sync in Cardano?
Looking at the source code, it seems that Cardano used to not have headers-first sync, but later, it started doing headers-first sync. In bitcoin, there's a benefit in headers-first sync because block ...
0
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1
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18
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how to use ownPubKey and RedeemerType and DatumType
My code is here.
{-# LANGUAGE DeriveAnyClass #-}
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE ...
- 21
1
vote
1
answer
32
views
Is there a possibility to fetch the volumen of e.g Minswap with Koios or Blockfrost?
I am looking for a way to get the volume of certain protocols on Cardano(e.g. Minswap or SundaeSwap). I thought of using Koios or Blockfrost, but I am not entirely sure how to get volume. If there's ...
- 58
1
vote
1
answer
79
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How does Cardano technically handle reorgs?
In bitcoin, a longer chain will cause a reorg if it's not the "main-chain", where some blocks' side-effects will be reverted, and others in another branch will be processed and become part ...
4
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2
answers
151
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Why not just simply use Haskell instead of Plutus?
I can think of two major reasons as to why Cardano chose a strongly-typed functional language for it's Blockchain:
Strongly-typed - because as the capabilities of the Blockchain and scripts become ...
- 488
0
votes
2
answers
46
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Upload Smartcontract to Blockchain
I've seen a tutorial where a smart-contract was uploaded to Cardano Blockchain using cardano-cli, so I would like to do the same thing using plutus PAB. How would I do that? The tutorial on lecture 6 ...
4
votes
1
answer
244
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Rising trend in blocks missing: what could be the reason? Should we worry?
I came across this fantastic real-time data-visualization site for Cardano: Cardano Blockchain Insights.
My question is: why have the missing blocks increased by so much? Epoch 347 is due to some ...
- 63
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0
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96
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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,
...
- 123
4
votes
3
answers
855
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 ...
- 143
1
vote
2
answers
83
views
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-...
- 1,055
3
votes
3
answers
222
views
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 ...
- 952
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1
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85
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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?
- 1
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93
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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 ...
- 11
2
votes
2
answers
122
views
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 ...
- 21
2
votes
1
answer
28
views
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 ...
- 1,549
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1
answer
173
views
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 ...
- 21
2
votes
1
answer
141
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 ...
- 21
2
votes
2
answers
148
views
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 ...
- 21
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3
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783
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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 ...
- 23
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1
answer
34
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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 ...
0
votes
2
answers
143
views
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-...
- 23
1
vote
0
answers
37
views
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 ...
- 11
2
votes
2
answers
2k
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.
- 31
1
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2
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198
views
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 \
--...
6
votes
2
answers
328
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?
- 827
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66
views
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 ...
- 701
7
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2
answers
2k
views
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?
- 173
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2
answers
1k
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.
- 101
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3
answers
171
views
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 ...
2
votes
1
answer
281
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
{
&...
- 1,777
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1
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141
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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,...
- 11
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1
answer
116
views
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 ...
- 11
3
votes
1
answer
233
views
Any update on RINA?
Recursive Interconnect Network Architecture was being discussed for Cardano. Is the networking team or anyone looking into this?
- 31
3
votes
1
answer
241
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 ...
- 33
8
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6
answers
3k
views
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?
- 113
6
votes
6
answers
2k
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 ...
- 221
8
votes
4
answers
225
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 ...
- 81
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1
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73
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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 ...
- 11
7
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1
answer
65
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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/...
- 71
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3
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289
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)?
- 191
2
votes
1
answer
33
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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 ...
- 21
1
vote
2
answers
146
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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 ...
- 113
7
votes
1
answer
118
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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. ...
6
votes
3
answers
444
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 ...
- 73
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1
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78
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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 ...
- 458
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votes
1
answer
101
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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 ...
- 345
4
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1
answer
80
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 ...
