In Cardano, the smart contractors are submitted as transactions with a validator script. Funds locked in the smart contract are in UTXO with the address as the "Script Address". And based on three parameters called datum, redeemer, and context, the validator script provides the go-ahead for the release of funds.
Based on this setting theoretically, ...
I would not say that PoS is faster per se, but you have to carefully balance PoW challenges in order to avoid single entities or groups to dominate the blockchain with huge computing powers. This somewhat limits how fast you mine new blocks, which store verified transactions, impacting transaction speed.
PoW and PoS are "tools" to select who will ...
You don't have to store a lot of information on the blockchain itself to provide certain evidence. (that something existed at a certain time or was signed by someone, or that something was not tampered with).
Usually, it is enough to store for example a link to something and a hash or a signature. (i.e. onchain should be stored only the data that are ...
Digital assets are stored on the blockchain. Your wallet is a window to the blockchain in that it allows for convenient functionality (e.g. filtering all transactions for transaction where your wallet-connected expenditure address is either receiver or sender).
Currently, Daedalus stores the entirety of the Cardano Blockchain on your device. But altering the ...
I'm only answering about the size for now: on one of the cardano nodes that I just checked some seconds ago
$ du -sh state-node-mainnet
I can't say how fast it grows. I just look at it from time to time.
The rate of transactions per second does not affect Cardano's power consumption significantly, but implementation of smart contracts, scaling mechanisms, etc. may have a measurable impact in the future.
Cardano is largely as eco-friendly as all proof-of-stake blockchains. Its actual energy consumption is roughly the power consumption of a typical staking ...
The seed phrase is used to generate your private keys (and thus your public keys as well). If someone has access to your seed phrase, they can "restore" your wallet Yoroi, Daedalus, or any other wallet application and can do anything with your wallet that you could do. The only way to know if this has happened is to notice any transaction sending ...
Micro-transactions could be done one layer above (for example Hydra) and the transaction fees will only for settlement.
Also, it is fairly easy to lower to fees to match the real-world price. In the future, maybe an AI system can do that will a help of oracle.
Here is an important note regarding Tx metadata:
There is no limit on the number of key-value pairs (except the overall transaction size limit) or on individual structured values. However, there is a limit on the size of text strings and byte strings within the structured values, which is implemented to mitigate the problem of unpleasant or illegal content ...
I assume with "blockchain/node size" you mean the growing size of the immutable ledger database. The current growth rate is pretty linear. In the last 100 days it grew from 7 up to 10.5 GB
So we see a growth rate of about 1 GB per month, which would result in a 12 GB per year.
Keep in mind the ledger DB folder now contains every UTXO action since ...
You will need to send your verification key from Nami to the backend during the handshake in order to validate the signature.
cardano.signData(address: BaseAddress|RewardAddress, payload: string) : CoseSign1
The returned CoseSign1 object contains the payload, signature and the following protected headers:
key_id => PublicKey,
address => BaseAddress | ...
The plutus contract that you have written is in template haskell. Now to convert this to something that can be used on chain one needs to compiled it to plutus core.
From an educational point of view I'll explain how this is done with a concrete example. Take for example the lobster smart contract's used in naming the lobster . Note that this project ...
Does Cardano allow for appending metadata like an arbitrary hash string to a transaction?
I believe you can do this without needing any tokens/NFTs by just making a transaction that has the metadata attached:
This can be done using the --metadata-json-file switch when building the transaction:
Cardano is using what we call a chimeric ledger, which means it uses both account (similar to Ethereum) and UTxO (similar to Bitcoin) style accounting systems.
This enables the ledger to take advantages of the UTxO system but at the same time be storage efficient where it comes to specific aspects of the ledger, such as rewards.
I highly recommend a video of ...
Feel free to improve! :)
see cardano lecture,see question,...
smart contract code location
not stored on-chain, but shipped with transaction
stored on-chain ?
smart contract maximum count
access third party contract e.g. an oracle
import and use lib (...
Hydra is a layer 2 solution where transactions are completed off chain, moving ADA to Hydra will open a Hydra head where transactions will be made, once the Hydra head is closed I think the main chain then confirms transactions within the Hydra head with 1 transaction fee effectively executing hundreds or thousands of tx's for a single fee
You can't share the underlying data folder so will need a copy for each node. However, you can pre-seed them by syncing one, then duplicating its db folder into the others, so that when they start up they do not need to re-sync and validate the entire chain.
If you can get a copy of the db folder form a trusted source, you could potentially speed up the very ...
Potentially yes, but practically it doesn't make any sense.
This is a controversial question. Everyone has their own opinion on this matter.
Cardano has been using the Proof-of-Stake consensus mechanism starting from its birth. In PoS network validators use staking for earning money. PoS does not consume such a monstrous computational power required to mine ...
As Fermat said, you can follow the lobster example.
Another option is the Exercise 4 of Alonzo-testnet.
Exercise 4 - Solution
There you can find:
Compile hs file
Build script address
Build transactions to interact with the validator script
After installing the wallet, look for the file called daedalus.bat inside Daedalus installation directory. Open it and change the following line:
-n --db-path ^
for anything like this:
-n "%APPDATA%\Daedalus\DB Wallet" ^
If you've already synced, move the ledger database to the new location.
You can find the second ...
I'm not sure that I fully understand your question. 2^256 what?
To my knowledge, the maximum size of a smart contract on ETH is 24 KB. According to the Cardano Foundation, the maximum transaction metadata size is 16 KB. Since smart contracts are not yet deployed, I'm not sure what the size limitation will be but, it will probably be in this ball park.
In the lecture #4 of the current Plutus Pioneer program, there's a way to run a faux blockchain with Plutus contracts. The first 90 minutes are a Haskell tutorial, but then it goes into how to use the EmulatorTrace.
It's not a full testnet, so it might not be a full replacement for Ganache (which I haven't used), so maybe No.
It's impossible to share the same state directory. But if your concern is primarily disk space, you can use filesystem deduplication. For example I have a dedicated zfs volume with dedup setup I use to limit disk usage for multiple nodes ran on same machine for test networks. I wouldn't recommend doing this on mainnet though as running a bunch of nodes on ...
Compared to the size of the Bitcoin ledger, the size of the Cardano blockchain is relatively small as of October 20, 2021. You can see the blockchain size if you look in the Daedalus wallet's folder called ../wallet/chain/immutable.
| Network | Blockchain size | Number of blocks |
There is no way to revert a payment. One of the core features of a blockchain is that it is immutable (unchangeable).
As for smart contracts, you could definitely write a script to hold the funds in escrow. This would allow the parties to verify that the goods were passed before the funds are handed over.
This still wouldn't be "revert"ing, but ...
ADA can not be minted due to the parameter name of ADA in ledger and minting transaction validation being followed in Cardano.
Assets in Cardano is called as "Values" in eUTXO. Values can be ADA or any other Native tokens. In this respect, other user minted tokens also have equal status. Tokens can be minted. Minting of ADA is not ...
Reddit variety understood the pasta.
There are some maps:
https://adatools.io/hologram only slightly helpful. But adatainment allows one to drill down on to staking pools to see where they are on ...