All Questions
2,655
questions
0
votes
1
answer
23
views
Custom currency error: Cannot build the initial state: Tag "toCardanoPolicyId"
I try to set an initial state of the emulator like so:
test :: IO ()
test = runEmulatorTraceIO' def emCfg myTrace
where
dist = Map.fromList [ (senderWallet, Ada.lovelaceValueOf 100_000_000)
...
- 343
0
votes
3
answers
127
views
Full stack dApp example/tutorial
Now that I am comfortable with Plutus, I want to build a full-stack dApp with frontend and wallet support, so users can interact with it easily.
This auction dApp is a good example, but it does not ...
- 129
0
votes
0
answers
17
views
NFT minting code gives error (frontend entirely)
async buildSendADATransaction(e){
//Step 1: Initialise the transaction
this.initTransactionBuilder(e);
const shelleyOutputAddress = await S.Address....
- 131
1
vote
1
answer
61
views
Possible to get the total supply of a native token in a smart contract?
Is it possible to get the total supply of a native token in a smart contract, similar to the following Solidity code from here? One can easily query it from an external API.
address token = ...
- 129
0
votes
1
answer
53
views
E042:Error: Unsupported feature: Type constructor: GHC.Prim.Addr
Has anyone encountered such an issue?
Validator works fine and cborHex is generated when "writeSerialisedScript" run in cabal's repl. But when building with cabal build app, the following ...
- 805
1
vote
1
answer
31
views
Column does not exist when querying Rosetta endpoint
I'm currently running cardano-node version 1.35.0 and rosetta-server 1.8.2. The node is synced and I have blocks in postgres, however each query to rosetta throws an error:
curl -vvv -X POST 'http://&...
- 111
0
votes
2
answers
64
views
Can there be duplicate Policy IDs?
An asset is uniquely identified by an asset ID, which is a pair of both the policy ID and asset name.
The Policy ID is a hash of the monetary policy script that was used to mint the token. What ...
- 129
0
votes
1
answer
40
views
Is validator script needed to spend a UTXO locked by its hash?
When a UTXO is produced, it is locked to an address, i.e., the hash of a script, not the script itself. When a transaction spends it, does the tx have to provide the script in its input? There are ...
- 129
0
votes
1
answer
39
views
SlotToPOSIXTime in English Auction Demo
in my cabal repl, i'm getting the following error from trying to replicate the week1 demo of Plutus-pioneer-program. I'm also unable to simulate the example scenario in the playground (i can see ...
- 23
2
votes
2
answers
79
views
How to run a simple Fib function offline?
On Ethereum, I'm able to run and test a Fibonacci function by writing a Solidity smart-contract with a fib method, compiling to the EVM, deploying and running offline by using any EVM implementation, ...
- 123
1
vote
1
answer
39
views
How often do we see chain reorgs in Cardano?
Is there a specific metric we can follow on-chain, or how we can observe or infere a chain reorg has happened?
- 11
0
votes
1
answer
35
views
Key derivation are unclear
I watch this video on Key Derivation process (https://www.youtube.com/watch?v=4tSQBK75CPU&t=722s). Basically, from mnemonic phrase --> create root key --> create public addresses
Then, I see ...
- 121
0
votes
2
answers
395
views
How does Cardano Halving work?
Does Cardano Halving work similar to Bitcoin Halving? The next Bitcoin halving is projected to take place in March 2024, will Cardano Halving happen the same year?
The Cardano price prediction for ...
- 37
2
votes
1
answer
77
views
Getting the CurrencySymbol of PlutusV2 MintingPolicy
I'd like to get the CurrencySymbol of a PlutusV2 MintingPolicy. There's a function defined in Plutus.Script.Utils.Scripts with the following signature:
scriptCurrencySymbol :: Versioned MintingPolicy -...
- 805
3
votes
1
answer
34
views
Track incoming payment of an address using cardano-db-sync
I have a cardano-node with cardano-db-sync installed. In this node, I also have a separate database named CDT, and a web UI to connect to this CDT database.
I defined an address named addr1xxxxxx ...
- 121
0
votes
0
answers
7
views
Address() in @cardano-sdk/core is empty
S = require("@cardano-sdk/core")
new S.CSL.Address()
return Address{}
According to documentation it should have methods associated. Any ideas what is happening ?
- 131
1
vote
1
answer
48
views
Unable to compile script
I'm stuck trying to compile my minting policy - getting the following error message:
• Couldn't match type ‘Colony’ with ‘BuiltinData’
Expected type: template-haskell-2.16.0.0:Language....
- 805
1
vote
1
answer
64
views
How to use reward withdrawing via cardano-cli?
Has anyone played around or stumbled upon tutorial examples on how to use reward withdrawing via cardano-cli? I want to study the commands related with "withdraw" keyword. I have not seen ...
1
vote
1
answer
64
views
How to install/use cardano-serialization-lib
I follow this guide to get start with cardano-serialization-lib.
Install nodejs package with:
npm i @emurgo/cardano-serialization-lib-nodejs
Still can't get it running. The module 'rust-lib' can't be ...
- 343
0
votes
0
answers
17
views
Error deserializing multiple UTXOs
When deserializing multiple UTXOs from the same wallet, in some point of the rawUtxos the process crash with this error. When doing the same process to deserialize the same UTXO but not on a loop, it ...
- 1
0
votes
0
answers
14
views
Nami Wallet login flow on NodeJS
I want to be able to authenticate users in my web app using Nami and nodejs. As in, once the user connects with their Nami Wallet, I want to create a login session and store the user in a database, ...
- 1
0
votes
0
answers
41
views
PaymentPubKeyHashes don't match
I have a structured datum like:
data VestingDatum = VestingDatum
{ beneficiary :: PaymentPubKeyHash
, deadline :: POSIXTime
} ...
- 343
3
votes
2
answers
48
views
How to detect a wallet change event
How do i detect that my user has switched their wallet to a different one in browser. When a user connects their wallet to my web app, we store their wallet address temporarily for use in the future....
- 456
1
vote
1
answer
34
views
Failure building documentation [closed]
I've been trying to build documentation to no avail: Below is the log of the output i get after running nix build -f default.nix docs.site --extra-experimental-features nix-command
@nix { "action&...
- 805
1
vote
1
answer
78
views
when and where to use different types of addresses in cardano
From here https://docs.cardano.org/learn/cardano-addresses
I know that there are 4 types of addresses:
base addresses
pointer addresses
enterprise addresses
reward account addresses
For my ...
- 121
0
votes
1
answer
32
views
Unable to attach two reference inputs to a transaction with Plutus Emulator
I have written a script that will fail unless it receives both oref1 and oref2 as reference inputs. I have the following emulator code:
let rule = mempty
<> C....
- 3
0
votes
1
answer
37
views
nix shell did not work in plutus-apps
I checkout to branch c2b310968d0915e2af0ea4680186b41ad88ffbe9 and run nix-shell at plutus-apps. No error, nothing change when I run nix-shell.I reinstalled nix, changed iohk-cache, reinstalled ubuntu. ...
- 1
0
votes
1
answer
75
views
How to get balance of enterprise address
https://docs.blockfrost.io/#tag/Cardano-Addresses/paths/~1addresses~1%7Baddress%7D~1extended/get
I am using above blockfrost api to get address balance.
However, it isn't working with enterprise ...
- 41
0
votes
1
answer
57
views
Transaction in Cardano
I created transfer function with blockfrost.js and cardano-serialization-lib.
I refered following code.
https://github.com/blockfrost/blockfrost-js/tree/master/examples/simple-transaction
When I try ...
- 41
0
votes
1
answer
66
views
Is hydra.iohk.io just down or has there been a change in .json configs’ provisioning?
Where does one get the basic .*-config.json, .*-topology.json and .*-genesis.json files for package building nowadays? The URLs that always worked for me seem down, e.g.:
https://hydra.iohk.io/job/...
- 103
0
votes
0
answers
28
views
Possible inconsistence data in db-sync
I've this query on Preprod:
SELECT
ENCODE(TX.HASH, 'hex') as tx_hash,
TX_OUT.INDEX,
TX_OUT.ADDRESS_HAS_SCRIPT,
ENCODE(TX_OUT.DATA_HASH,'hex') AS DATUM_HASH,
SCRIPT.ID as script_id,
...
- 196
0
votes
0
answers
18
views
traceIfFalse not showing in cardano-cli output
I have a minting policy:
mkNftValidator :: NftParams -> BuiltinData -> ScriptContext -> Bool
mkNftValidator _ _ _ = (traceIfFalse "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ...
- 178
1
vote
2
answers
254
views
Send native tokens without running node
is there any library or proper guide to send custom/native tokens in NodeJS?
i don't want to run full node (cardano-node/cardano-wallet), just want to build and sign a transaction and submit it via ...
- 13
0
votes
1
answer
29
views
building cardano-node and cardano-cli on nix
I'm following the instructions here:
https://github.com/input-output-hk/cardano-node/blob/master/doc/getting-started/building-the-node-using-nix.md/
But I'm not sure how to get it to compile the 1.35....
- 23
0
votes
1
answer
53
views
Module `Ledger.Typed.Scripts' does not export `wrapValidator'
I try to compile code from Plutus Pioneer Program week 4. These lines cause error.
typedValidator :: Scripts.TypedValidator Vesting
typedValidator = Scripts.mkTypedValidator @Vesting
$$(PlutusTx....
- 343
1
vote
1
answer
40
views
How is protocol.json used when minting NFTs?
I'm tinkering with creating NFTs via the cardano-cli. The various "how-to" pages I have found all have me download protocol.json using
cardano-cli query protocol-parameters \
--testnet-magic ...
- 349
1
vote
2
answers
175
views
Nix-shell in plutus-apps
I'm using Ubuntu 20.04.5 with an 11th Gen Intel® Core™ i7-1195G7 @ 2.90GHz × 8.
After cloning the plutus-apps repo and setting my nix config, i can't get pass the following nix-shell error:
trace: To ...
- 23
0
votes
0
answers
15
views
ownPaymentPubKeyHash == wallet address?
According to this documentation, ownPaymentPubKeyHash is:
Get the hash of a public key belonging to the wallet that runs this contract. * Any funds paid to this public key hash will be treated as the ...
- 343
0
votes
2
answers
22
views
Get back my funds after a mistaken self transaction on Cardano
I accidentally made a self-transaction with my account and would like to know if I can get it back.
As you can see my account here, and this is my self-transaction sent 2 weeks ago.
I'm using cardano-...
2
votes
2
answers
69
views
Collateral for new Wallets
New users of Cardano sometime want to get started quickly and often face the daunting task of understanding what collateral is. Then faced with the fact that they need to send some collateral to their ...
- 312
0
votes
1
answer
62
views
How to decode the datum stored across records in the tx_metadata table for a given tx
For a given tx - where a contract has been used, outputs have been stored in the tx_metadata table - in this case key/value pairs where the values of keys 0 through 10, when appended together to form ...
- 310
0
votes
1
answer
26
views
Public cardano-wallet service list
While I am checking cardano-wallet-js, I noticed requirement.
Before start using the library you will need a cardano-wallet server running.
Is there any public cardano-wallet server which I can use ...
- 41
0
votes
2
answers
55
views
Mesh Error: getUsedCollateral not implemented
I'm using mesh and follow this example of always-succeed smartcontract.
I successfully send Lovelace to the script address. But when building transaction for redeeming Lovelace from the script address,...
- 343
0
votes
1
answer
15
views
Get margin amount in private pool
I want to get reward amount for specific pool for specific epoch.
https://docs.blockfrost.io/#tag/Cardano-Pools/paths/~1pools~1%7Bpool_id%7D~1history/get
Above blockfrost api provides reward amount ...
- 41
0
votes
0
answers
50
views
Decode the cbor datum in tx_metadata
I cannot find a way using an available nuget package, to decode the cbor data stored in tx_metadata for a given transaction. cbor.me does convert it to an object but even there I cannot find how to ...
- 310
1
vote
2
answers
44
views
Get pool reward for specific epoch
I want to get pool(private pool) reward for specific epoch.
I searched blockfrost.io apis, can't find reward api.
How can I get reward by api? Or other solution will be fine like graphql.
- 41
0
votes
2
answers
39
views
pay collateral with cardano-cli
Followed the guide here to build preprod testnet wallets, was wondering however I can create the collateral utxo with cardano-cli ?
- 433
0
votes
1
answer
61
views
How to get all unSpent UTXOs at script address OnChain
Hi i am building CrowdFund where i need to know the total amount raised at the script as an OnChain validation.
i was looking at Contexts.findOwnInput but would this only return the tx-in's provided ...
0
votes
0
answers
29
views
How can i store local variables in Plutus just like solidity?
As the title suggests, how do i store local variables in Plutus? In solidity, i can have a (address => bool) mapping to enforce a rule that some functions should be callable at most ONCE by a ...
- 11
0
votes
1
answer
118
views
How can I interact with smart contract created from Marlowe in the testnet/mainnet?
I create a smart contract with Marlowe from https://play.marlowe-finance.io
I now want to deploy the contract in the preview testnet and later mainnet. I imagine it must be somehow converted into ...
- 343