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stake pools - do they encourage centralisation?

Quote from cardano docs: The higher is the stake in a pool, the more rewards will be assigned to its owners. Doesn't this mean that the bigger the pool is the more profitable it is and therefore it ...
bridgemnc's user avatar
1 vote
1 answer
64 views

pub-key hash for Plutus Pioneers - self-certification challenge

The entry form for the Plutus Pioneers - self-certification challenge reads as follows: Please provide a Cardano public key hash I am guessing this should be associated with a wallet. In general I ...
John Shearing's user avatar
0 votes
1 answer
42 views

Cardano Node Compiler Error libsodium Fedora

for some reason i'm unable to compile cabal projects related to cardano projects on this system. not sure what could of changed recently as aside from recent system updates i haven't changed much. or ...
Kunikos's user avatar
  • 13
0 votes
1 answer
28 views

How to build smart contract depending on trusted server for additional information

I am trying to build a smart contract that will need to rely on off-chain information from a trusted server in order to gather to the state of something which will impact on how the UTXO should be ...
Kunikos's user avatar
  • 13
0 votes
1 answer
31 views

Examples of open source production level DApps on Cardano?

I am looking for Cardano DApps which are: Actually deployed and used on mainnet Have published their source code (at least on-chain part) Examples of non-Plutus PL used (like Plutarch, Aiken, ...) ...
uhbif19's user avatar
  • 121
1 vote
1 answer
41 views

Failed to build atlas examples with cabal

I tried both in the main branch and in the atlas-0.3-update branch and get the same result. but when i run cabal build i get the same error fatal: Could not parse object '...
Kunikos's user avatar
  • 13
0 votes
1 answer
35 views

How to obtain signature from the cborhex? If i have simple-tx.signed

{ "type": "Witnessed Tx BabbageEra", "description": "Ledger Cddl Format", "cborHex": "84a3008182582088921ae2626e" } This is ...
Faizan Shaikh's user avatar
1 vote
2 answers
93 views

Decompiling Plutus Core Binary Encoding

I'm working with Plutus Core smart contracts, and I have the binary encoding of a Plutus Core script. I'm curious to explore the higher-level Plutus code or any human-readable representation of the ...
Salih Karadag's user avatar
0 votes
0 answers
4 views

I encounter issues when retrieving metadata for tokens on the Cardano network

I encountered an error while retrieving token metadata as follows: var policyId = '8bca871dcd4f1dd9588d901d02677b6d2413fd19e4c8febfc353edff'; var assetName = '5045505041'; // PEPPA var subject = ...
Solider's user avatar
  • 13
0 votes
0 answers
26 views

How to analyze the Plutus budget usage?

When I run my minting policy script I get the error Command failed: transaction build Error: The following scripts have execution failures: the script for policyId 0 (in the order of the PolicyIds) ...
dmitry_stas's user avatar
0 votes
0 answers
15 views

Some issues encountered when working with Cardano

How can I generate a bech32 address in the following code: const wallet = new AppWallet({ networkId: 0, fetcher: blockchainProvider, submitter: blockchainProvider, key: { type: 'root', ...
Solider's user avatar
  • 13
0 votes
1 answer
72 views

Mint an NFT using policy script on cardano

I'm trying to run validations before minting an asset/nft on cardano. I have written the policy script using plu-ts and transactions using mesh sdk. Script export const mintNFT = pfn( [datum.type, ...
Saad Raja's user avatar
0 votes
0 answers
34 views

I want to develop my project related to Cardano

I want to develop a personal project related to Cardano. I have read some documents, but they require using project_id from Blockfrost. However, I don’t want to go that route. So, I’m wondering where ...
na Ha's user avatar
  • 1
0 votes
1 answer
52 views

Retrieve ADA from a UTXO address linked with my ADA account on Ledger

I sent ADA from an exchange to Ledger, to an address listed as part of a set of addresses used as the receive address for a previous transaction. I chose one of these multiple "To" addresses ...
Kaolu_zhong's user avatar
1 vote
2 answers
92 views

Documentation for developing a personal Cardano project

I am looking to build a personal project related to Cardano. Are there any documents on libraries or APIs to implement functionalities such as checking balance, transferring funds, etc.?
Solider's user avatar
  • 13
0 votes
1 answer
39 views

Why do i loose all wallets and need to resync after symlinking chain folder?

Since my partition with /home on it started to fill up, i relocated the folder ~/.local/share/Daedalus/mainnet/chain onto another drive. After moving the files and symlinking to the new location, i ...
Sven Eppler's user avatar
0 votes
1 answer
23 views

Nix error trying to install correct GHC version for Plutus

As recommended by Haskell/Nix expert lan Burzynski, I'm trying to use Nix install the correct GHC version for Plutus as follows: nix shell nixpkgs#haskell.compiler.ghc8107BinaryMinimal nixpkgs#cabal-...
Eric's user avatar
  • 85
1 vote
0 answers
39 views

How to decouple Constr from Data

Imagine I have the following field in the Datum: { "fields": [ { "int": 3810998862 }, { "int": 18446744073709552000 ...
SR - cerra.io's user avatar
0 votes
1 answer
23 views

How can Mithril update the transactions after taking the snapshot?

Question: When I check the Mithril explorer, The snapshots will be saved in Mithril Aggreagtor 5 times a day. Light wallets can then download this snapshot to see their transaction history without ...
Quang Daniel's user avatar
0 votes
0 answers
42 views

How can Datum be decoded from utxos that were generated using MeshJs Marketplace Smart Contracts?

I have datum that was formed using the MeshJS Marketplace Smart Contract. Can someone help me with the process to decode the datum. I have tried various methods mentioned in their discord with no ...
xchris's user avatar
  • 1
0 votes
1 answer
35 views

Securing Stake Pool With Hardware Wallet

was looking at this project for securing cardano stake pool node with a hardware wallet (trezor specifically) https://github.com/vacuumlabs/cardano-hw-cli just curious if anyone out there has used ...
Kunikos's user avatar
  • 13
2 votes
1 answer
76 views

Loading specific Datum JSON with Map structure into Plutus type

We have a specific Datum, taken from Orcfax oracle UTXO: https://preprod.cexplorer.io/datum/9ced750ebbb2c9a9eac2e07a91525cadd3bfab23950089faa3e3a55517d1033f the part we are interested in is the very ...
SR - cerra.io's user avatar
0 votes
1 answer
48 views

Creating a Testnet node ( stake pool ) on Ras Pi

I did watch this series on YT for Ras Pi - https://www.youtube.com/watch?v=GBdpE1ta1EU&list=PLBhbLwOuj0DfTnneuG3vyoDHY7Dv_aiyq&index=10 But I have a doubt about the updated method. Is Cabal ...
user10114's user avatar
0 votes
1 answer
98 views

Stopping Cardano node... Daedalus Mainnet (5.3.0#44942bd51)

I have just installed Daedalus Wallet V. 5.3.0 for the first time, in order to stake my ADA Cardano 3,800.00 tokens. I ran the 24 hour initialization synch before loading any ADA. that worked fine. ...
William Moore's user avatar
0 votes
0 answers
31 views

In which cases Plutus compiler is producing expensive code?

I have heard a couple of times, that is hard to make Plutus produce non-costly code, and one should consider writing scripts on a level with Plutarch's help instead. Still, I never get real reasons ...
uhbif19's user avatar
  • 121
0 votes
0 answers
15 views

Graphql-engine docker images

Anybody now the github for how the following docker images are being build. https://hub.docker.com/r/inputoutput/cardano-graphql-hasura/tags The image is used in https://github.com/cardano-foundation/...
MaartenM's user avatar
0 votes
1 answer
31 views

How web3 protocols know which UTXOs should be consumed

I'm trying to get the history interaction of a wallet on Levvy Fi via Cardano db sync. But I find it difficult to understand how Levvy Fi generates a wallet with their scripts and how they know which ...
manhdt's user avatar
  • 125
0 votes
2 answers
40 views

I want to mint an NFT using a JSON file using plu-ts, but I dont know how and where to start

I want to mint an NFT using a JSON file using plu-ts, but I don't know how and where to start. Do I need to create a Node? OR Do I need to write it in Haskel? I have read and performed everything from ...
Talha Sajid Chaudhary's user avatar
1 vote
1 answer
88 views

Cannot find utxo using cardano-cli on docker cardano-node preprod

I am trying to follow the project based learning program but get stucked here: https://plutuspbl.io/modules/102/1023 I started the docker container for cardano-node (https://hub.docker.com/r/...
Lars's user avatar
  • 63
1 vote
1 answer
41 views

Missing inline_datum_id in tx_out table

I'm trying to get the specified transaction's datum value, but it didn't appear in the cardano-db-sync db. Can anyone enlighten me, please? the transaction: https://cardanoscan.io/transaction/...
manhdt's user avatar
  • 125
1 vote
0 answers
262 views

MeshJs integration With Next 13 Error: Element type is invalid. Received a promise that resolves to: [object Promise]

I am trying to create a connect button to the Nami Wallet where the user can register so I can take the public address, network id, and so on as I need it for the backend. To implement the Nami wallet ...
Oliver's user avatar
  • 111
1 vote
1 answer
42 views

DBSync: Querying ma_tx_out

I queried ma_tx_out and used the fingerprint of an asset to get its ident so I could get the tx_out_id to get the most recent tx_out for a given asset - but that asset is only in that tx_out because ...
RelevantData's user avatar
0 votes
1 answer
42 views

How to query input UTXOs of a transaction

Could anyone help to query input UTXOs of a transaction, please? I tried to use tx_in and tx_out tables to view the detail inputs and outputs of the transaction https://cardanoscan.io/transaction/...
manhdt's user avatar
  • 125
0 votes
0 answers
35 views

Platforms calculating epoch start/end timestamps off by 1 second?

I've seen this many times now and I believe it's wrong, or at least strange. I'd like to see what you folks have to say. Let's take a look at any random epoch, say 400, and request Koios, Blockfrost ...
LACE pool's user avatar
  • 619
1 vote
1 answer
21 views

Asses Utxos Time In On-Chain Code

Can you assess the time a Utxo was created in on-chain code? i.e. A transaction to a smart contract that can claim only Utxos - in that contract address - sent in a specific time period?
user3755529's user avatar
0 votes
0 answers
11 views

Getting problem with sendPayment method in cardano-wallet-js

I am following (https://developers.cardano.org/docs/get-started/cardano-wallet-js/) this document for development using cardano-wallet-js. And using below script for sendPayment, but getting error to ...
samir jumade's user avatar
0 votes
0 answers
26 views

How to get pointer to an actual cardano address by pool script hash in format "script...."?

The address format is script15ew2tzjwn364l2pszu7j5h9w63v2crrnl97m074w9elrkxhah0e. In this example from https://github.com/DefiLlama/DefiLlama-Adapters/blob/main/projects/minswap/index.js, you can ...
ErikM's user avatar
  • 41
0 votes
0 answers
25 views

Unable to interact with cardano blockchain using cardano-wallet-js

My node is running on 6000 port. And cardano-wallet is running on 6002 port. ubuntu@ip-172-31-44-6:~/cardano/testnet$ netstat -tuln | grep 6000 tcp 0 0 0.0.0.0:6000 0.0.0.0:* ...
samir jumade's user avatar
1 vote
1 answer
19 views

Restore state snapshot running out of disk space

I'm following this guide to restore the latest state of the chain to my local machine https://github.com/input-output-hk/cardano-db-sync/blob/master/doc/state-snapshot.md while running the restore job ...
manhdt's user avatar
  • 125
0 votes
1 answer
27 views

Historical price data for Cardano native assets

Does anyone know where I can get historical price data for Cardano native assets? Data that can subsequently be used for data analysis and visualization. Something similar to what taptools is using ...
genesisblock's user avatar
0 votes
0 answers
6 views

What DAPPS Can Be Built On EUTXO Chains That Account Based Chains Cannot Make?

I remember reading that the EUTXO model is a superset of the account-based model. My question is does this mean that there are some types of Dapps that can only be built on EUTXO chains, and if so ...
KryptoKing's user avatar
0 votes
1 answer
25 views

Blockfrost API error with pycardano

I get blockfrost.utils.ApiError: {'status_code': 400, 'error': 'Bad Request', 'message': 'Invalid address for this network or malformed address format.'} when using pycardano and this code # Create a ...
Mik_A's user avatar
  • 101
0 votes
0 answers
23 views

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 ...
samir jumade's user avatar
0 votes
0 answers
17 views

(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 ...
samir jumade's user avatar
0 votes
1 answer
45 views

pycardano library seed phrase

found nice examples generating verification keys and payment keys but I don't get to same time generate the seed phrase. Without the seed phrase I cannot open the wallet in a hot wallet to view it and ...
Mik_A's user avatar
  • 101
0 votes
1 answer
66 views

Why is there no real Wallet Plugin for Firefox

It seems that wallets are not able to implement cip30 for firefox, what is the hurden to do it, and why does it work for chrome?
wutzebaer's user avatar
  • 691
0 votes
0 answers
37 views

Getting error while submit sign transaction

I am try to submitting sign transaction on Rosetta (https://ada-rosetta.nownodes.io/construction/submit) but, each time getting below error. TTL is already higher than slot. Request { "...
Brijesh Lukhi's user avatar
0 votes
0 answers
15 views

Coming from ethereum I am looking for the Cardano equivalent of https://remix.ethereum.org/ for quick development

I am coming from the Ethereum world, where I got started with https://remix.ethereum.org/ really fast. What is the equivalant in the Cardano world so that I can experiment fast just using my web ...
yazz.com's user avatar
  • 101
1 vote
0 answers
31 views

cardano-db-sync How could we define an asset as NFT?

Could anyone tell me if is there any way to check if an asset is NFT using the database of cardano-db-sync? I tried to look at tx_metadata table and check if in json field contains an image, but many ...
manhdt's user avatar
  • 125
1 vote
1 answer
22 views

Cabal build error when compiling simple Plutus code

From inside nix-shell, I run cabal build (after running cabal update) and I get the following error: Failed to build libsystemd-journal-1.4.5.0.0.0.0.1. Build log ( /home/eric/.cabal/logs/ghc-8.10.7/...
Eric's user avatar
  • 85

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