Questions tagged [plutus]
A programming language based on Haskell used to write smart contracts on the Cardano blockchain.
647
questions
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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, ...) ...
- 101
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0
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15
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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) ...
- 35
0
votes
1
answer
20
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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-...
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1
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0
answers
35
views
How to decouple Constr from Data
Imagine I have the following field in the Datum:
{
"fields": [
{
"int": 3810998862
},
{
"int": 18446744073709552000
...
2
votes
1
answer
55
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 ...
0
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0
answers
18
views
Is Plutus compiler backend producing code cheap enough for production purposes?
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 ...
- 101
1
vote
1
answer
19
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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?
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1
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1
answer
12
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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/...
- 85
0
votes
2
answers
70
views
Validator always accepts and Mints (but it shouldn't)
Hey I have this simple stupid validator:
validator {
fn nft(datum: Datum, _redeemer: Void, context: ScriptContext) {
let ScriptContext { transaction, purpose } = context
when purpose is {
...
- 11
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0
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50
views
I am getting error when using nix build command
when using following command
nix --extra-experimental-features nix-command build -f default.nix plutus.haskell.pack ages.plutus-core.components.library
getting following error
error: could not set ...
0
votes
1
answer
29
views
I am getting error while using "cabal build all" cmd
I am new to plutus. I am trying to learn plutus for which I am using "plutus-starter" code to begin. while using "cabal build" i am getting following error:
Resolving dependencies.....
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0
answers
24
views
division amount to multi cardano address
There is a way to split a Cardano address among several addresses, for example, deposit an amount to one address and divide it equally among the holders of 100 NFTs.
thanks
- 1
2
votes
1
answer
54
views
How to handle sensitive data in smart contracts?
I'm interested in creating an escrow smart contract using Plutus, where a seller stores an encryption key in the Datum and sells it for a price. The key should only be accessible to a buyer who pays ...
0
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2
answers
69
views
Different types of Datums
I have a good understanding of the role of Datums in Cardano's Extended UTXO model, including their use in representing the state of a smart contract. However, I'm seeking further clarification on the ...
1
vote
1
answer
19
views
Transfer funds to "heir" - Possible?
Is it possible to write a smart contract in cardano - without off-chain solutions - that would hold funds until a specified date (or block height), and if I didn't interact with that smart contract ...
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0
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48
views
How to obtain the public key hash in on chain plutus validator?
It seems public key hash is generated from blake2b_224 but in on-chain validator we only have blake2b_256. Is there any way to obtain public key hash from public key in cardano plutus?
2
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2
answers
60
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Adding stake credential to script address
I compiled my plutus script and generated a payment credential only address. The logic all working fine- no issues.
However when I add a stake credential to my plutus script address, the logic starts ...
- 21
2
votes
2
answers
73
views
Javascript SDK for working with Plutus smart contracts
Are there any javascript SDKs which enable you to do the following:
programmatically create and submit a Plutus smart contract to mainnet
check what assets are currently locked at a given script ...
- 321
0
votes
1
answer
91
views
Error: encoding/hex: invalid byte: s When using Lucid calling payToContract
I am getting an issue when creating a Lucid transaction and calling payToContract
I have created the datum and it is erroring on the line that converts this datum toHex
With the following error: Error:...
- 101
1
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1
answer
22
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Need to add signatures to plutus-simple-model-transaction
Any idea how to sign a transaction with multiple keys in plutus-simple-model ?
- 85
3
votes
2
answers
414
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Can a smart contract execute itself automatically?
I was wondering wether a smart contract can execute automatically or not. For example, let's say I have a vesting contract that, when a certain deadline passes, automatically executes and send some ...
- 53
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0
answers
21
views
TooMuchSpace error when running uplc profiling tool on simple minting policy
I have the following minting policy:
{-# OPTIONS_GHC -fplugin-opt PlutusTx.Plugin:profile-all #-}
{-# INLINABLE verify_mint #-}
verify_mint :: () -> V2.ScriptContext -> Bool
verify_mint () _ = ...
- 85
3
votes
2
answers
268
views
Which would be the future language for writing smart-contract?
As we might know well-known approaches for writing smart contracts on Cardano are using Plutus Tx or Marlowe based on specific requirements. However, according to the growth of the Cardano community, ...
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0
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77
views
Tx consuming script fails with: Caused by: (unConstrData #44000de140)... Third data argument, does not decode to a context when burning an NFT
I've this tx trying to submit to cardano-node 1.35.5:
...
- 196
0
votes
1
answer
26
views
Why is writeToScript reporting that my script costs 0 resources?
I have the following minting script:
{-# INLINABLE verify_mint #-}
script :: () -> V2.ScriptContext -> Bool
script () _ = (3::Integer) == 2+1
and the following off-chain code to mint a token:
...
- 85
0
votes
2
answers
70
views
playground-common package giving 'Failed to build scrypt-0.5.0' error
I'm trying to run my own little smart contract in the plutus-pioneer-program [fourth iteration] docker container and I'm having some problems. I've just added an extra folder alongside the other weeks....
- 25
0
votes
1
answer
18
views
how to use ownPubKey and RedeemerType and DatumType
My code is here.
{-# LANGUAGE DeriveAnyClass #-}
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE ...
- 21
2
votes
1
answer
21
views
Expecting one more argument to ‘RedeemerType’
My code is here
marketConstraints :: Market -> TxConstraints (RedeemerType -> ScriptContext -> Bool) (DatumType, ())
marketConstraints market = mustValidateIn (to $ scriptAddress market)
I ...
- 21
1
vote
2
answers
147
views
Unable to build project using latest version of plutus-apps using nix develop
When I run cabal repl on my project using nix develop I get the following error:
Warning: Requested index-state 2023-02-20T00:00:00Z is newer than
'hackage.haskell.org'! Falling back to older state (...
- 85
1
vote
0
answers
20
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PlutusTx TxInfo Type Mismatch
I am building a PlutusTx V1 Smart Contract for NFT Royalty distribution. Part of that requires totaling up the amount of Lovelace sent to the contract from the most recent tx. I came up with the ...
- 11
1
vote
4
answers
109
views
Is it possible to obtain the cbor hex/script bytes from a bech32 script address?
I would like to get the script bytes from the bech32 address of a script. Is this possible?
- 21
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0
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7
views
Reference to a name which is not a local
I'm trying to run unsafeFromBuiltinData against the following type used as redeemer:
data TypeA= A PaymentPubKeyHash
| B PaymentPubKeyHash
deriving (Show, P.Eq)
...
- 815
1
vote
1
answer
36
views
Need to access documentation for Plutus.Contract.Oracle but not available in https://input-output-hk.github.io/plutus/master/
Playground is discontinued but the updated documentation seems to be lacking in components that I have been working with.
I did try to look up the other versions they have listed in their gh-pages ...
- 13
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0
answers
21
views
Does someone know how to integrate the plutus docs snippets on Sublime text?
I want to integrate the plutus docs provided in the ppp, which is initialized this way:
python3 -m http.server -d ../plutus-pioneer-program/docs/plutus-docs/haddock
I already installed the LSP(...
- 53
0
votes
1
answer
78
views
Limit the number for each Token (AssetName) within one Currency Symbol (Policy ID)
is there any way to limit number for each tokens within one minting policy, in Plutus validator?
For example for policy ab12 I want to allow users minting tokens, in different transactions. Сan the ...
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1
vote
1
answer
190
views
How can I access Haddock documentation for Plutus?
The link to the Plutus documentation - https://playground.plutus.iohkdev.io/doc/haddock/ - is broken. Is there another way to browse the haddock documentation for the latest version of Plutus?
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1
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0
answers
33
views
setup a Plutus project use haskell.nix Error on Mac M1
I'm trying to set up a Plutus project with flake on my Macbook by IOHK document
I did the following steps:
create default.nix
enter command nix flake init --template templates#haskell-nix --impure
...
- 11
0
votes
1
answer
29
views
Unable to convert BuiltinString to JSON
I would like to include a BuiltinString in a datum but am unable to do so as BuiltinString has neither a FromJSON nor a ToJSON instance. Is there an alternative to implementing these instances by hand?...
- 85
1
vote
0
answers
14
views
Comparing VALUES in a smart contract. How to know if they will be normalized or not?
I need to make VALUES comparisons on chain.
I realized that if a use the (==) operator from Plutus it is very inefficient in matter of memory and cpu steps needed to compute.
(https://github.com/input-...
- 180
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votes
1
answer
111
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plutus-apps nix-shell on Mac M2 segmentation fault
I'm unable to run nix-shell on my new M2 Macbook.
I read through the posts from last year on setting up M1 Macbooks with previous plutus-apps tags, but the same steps do not seem to work.
Environment: ...
- 121
0
votes
2
answers
60
views
Unable to deploy Plutus NFT Minting Policy parametrized by TxOutRef using cardano-cli
UPDATE:
I'm making progress. It is apparent the TxOutRef stored on-chain has some extra-structure. For evidence I "printed" the TxOutRef's of the 'utxo' hard-wired in my minting policy and ...
- 63
1
vote
1
answer
65
views
Overuse of resources when comparing for equality of VALUES (==)
I found an strange consumption of mem and CPU when comparting VALUES on-chain.
If I do the same comparison with my own writing functions I found is more efficient. How could it be?
Everything is ...
- 180
0
votes
1
answer
59
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Need to Retrieve Info from (NFT)Assets in Policy ID to see if they are in a Plutus Contract (smart contract) or Not using Blockfrost API
I have a python script that retrieves the NFT asset name, and addresses of a specific policy ID using blockfrost API. Now I need to amend the script to add to the csv whether or not the specific asset ...
- 3
0
votes
3
answers
112
views
"The second data argument, does not decode to a context" when minting NFT with Mesh
This my script for minting NFT:
{-# INLINABLE mkPolicy #-}
mkPolicy :: BuiltinData -> PlutusV2.ScriptContext -> Bool
mkPolicy _ ctx = traceIfFalse "wrong amount minted" checkNFTAmount
...
0
votes
1
answer
156
views
How to resolve this "(FromAlonzoUtxoFail (UtxosFailure (ValidationTagMismatch (IsValid True)" transaction submission error on mesh library
I am getting this error on transaction submission.
""transaction submit error ShelleyTxValidationError ShelleyBasedEraBabbage (ApplyTxError [UtxowFailure (UtxoFailure (FromAlonzoUtxoFail (...
- 29
1
vote
1
answer
64
views
Error when trying to build my Plutus project
I am getting the following error after trying to execute cabal build:
cabal: Could not resolve dependencies:
[__0] next goal: cardano-crypto-class (user goal)
[__0] rejecting: cardano-crypto-class-2.0....
- 1,055
2
votes
1
answer
115
views
Unclear error during Plutus ScriptContext construction (force headList [])
I ran into an error while trying to autobalance a transaction body:
module Foo.Offchain where
import Plutus.V1.Ledger.Scripts (MintingPolicy)
import Plutus.V1.Ledger.Address (Address)
import Hydra....
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0
votes
1
answer
26
views
How can an endpoint receive multiple argument?
How can add multiple arguments on a certain endpoint?
How can I add more arguments to “start” function? Like “start x y” or “start x y z”?
{-# LANGUAGE ImportQualifiedPost #-}
{-# LANGUAGE DataKinds ...
0
votes
2
answers
71
views
How to generate CBOR hex of plutus smart contract
How can i generate the CBOR hex of a plutus smart contract. Does it requires to generate CBOR of onchain code only or both onchain and offchain?
Also if have a smart contract which requires parameters ...
- 29
1
vote
1
answer
168
views
How to deploy the Plutus smart contract
I am following Plutus-pioneer-program to learn smart contract development in Cardano. I have tried the onchain and offchain code, compiled and tested in Plutus playground and also in emulator trace. ...
- 29