Questions tagged [plutus-pioneer-program]
A program to recruit and train developers in Plutus for the Cardano ecosystem. Use this tag for questions regarding the Plutus pioneer program. Keep lecture and homework questions brief and on-topic. Give full answers that clearly explain why they resolve the problem.
37
questions
7
votes
3
answers
1k
views
Can blockchain viewers read the source code of a smart contract if they know its address?
I'm curious, is it possible to find the source code of the validation script of a smart contract (as well as other parts) that is already on the blockchain?
Or this code automatically picking up into ...
- 305
7
votes
2
answers
492
views
How to convert posixTime to slot number on Cardano Testnet
I'd like to obtain the slot number corresponding to a posixtime on Cardano Testnet.
For example, this might be useful if you need to set a slot number in cardano-cli, say building a transaction: ...
- 1,304
16
votes
4
answers
1k
views
On-chain and off-chain for Plutus SCs
Hi I am currently at lecture 5 of the Plutus Pioneers Programm and I was wondering which part of the code is on chain and which is offchain. I know that the valididation script is onchain but the ...
12
votes
2
answers
565
views
What does it mean that a UTxO sits at script address?
What does it mean that a "UTxO sits at a script address".
What is a script address?
- 191
8
votes
5
answers
279
views
Possible DApp infrastructure on Cardano. Interaction with users' wallets
I'm trying to build a possible DApp infrastructure on Cardano in my head.
We should write the validation script in Haskell. Also as I understand, it is suggested to use Haskell for the off-chain code ...
- 305
2
votes
1
answer
110
views
Why would ">:i " work in the repl but not "> :t "?
Doing week 04, watching "PPP 030403 - The EmulatorTrace Monad"
In the repl, having already imported as follows
>import Data.Char
>import Text.Read
>import Plutus.Trace.Emulator
>import Data....
- 349
2
votes
1
answer
149
views
HLS Compiler Error PPP (WSL2 + VSCode)
I'm trying to get HLS (Haskell Language Server) working in VSCode using WSL2 so I can get type hints. I've already ran through the week01 instructions so I have a working nix installation. However, ...
- 31
1
vote
1
answer
198
views
Playground client can't connect to playground server (all localhost)
I am on an Intel based iMac Pro running Big Sur (11.6.1)
I have followed every variant of the local playground setup I can find (all are some version of page 2 in this document https://docs.google.com/...
1
vote
1
answer
152
views
plutus-playground-client npm start error (MacOs Intel i7)
[Updated]
✖ ｢wdm｣: ERROR in Error: Child compilation failed:
Module not found: Error: Can't resolve '/Users/fanik/development/plutus_pioneer_program/plutus-apps/plutus-playground-client/undefined/...
- 13
0
votes
1
answer
186
views
plutus-playground-client crashes on Intel Mac (Big Sur)
After setting up environment for cohort 3 of the pioneers program, running the plutus-playground-client crashes on my Intel Mac (Big Sur).
I've been able to successfully set up Nix and all the code ...
- 327
9
votes
1
answer
214
views
plutus starter course
So I am trying to start a plutus project from scratch, as we are always just editing the .hs source files in the plutus pioneering program homeworks, wondering what are the bare necessary files needed ...
- 433
8
votes
2
answers
163
views
Referencing onchain contract as 3rd party
In solidity and EVM, it is possible to reference external contracts by providing the address and interface to the contract:
address ckAddress = 0x06012c8cf97BEaD5deAe237070F9587f8E7A266d;
...
- 171
7
votes
3
answers
548
views
Building Plutus-apps on Mac M1
I am in the 3rd pioneers cohort, going through the env setup. I have Mac M1 with Monterey. I installed nix and added config for the caches etc as recommended here: https://github.com/input-output-hk/...
- 101
6
votes
4
answers
633
views
Plutus environment set up: pro and cons
I am starting the Pioneer program by setting up the development environment. There are several ways to do that, I think 4!
At the end the two that seems to me more appealing are the one using nix or ...
- 207
4
votes
3
answers
445
views
nix-shell did not create the server/client directories
I am trying to follow the instructions in https://docs.plutus-community.com/docs/setup/Ubuntu.html
The nix-shell command completes without any errors. But, I cannot cd to plutus-plaground-server or ...
- 100
3
votes
1
answer
179
views
Working with BuiltinByteString
I tried to create a few modification on the NFT minting contract from week 5 of the plutus pioneer program.
I wanted to be able to mint a few tokens at once. My policy should require that the token ...
- 201
3
votes
1
answer
276
views
Referencing an external plutus script
I would like to understand how one can reference an external plutus script in one transaction. In solidity (for the other script), one can import the contract interface into their script, create an ...
- 31
3
votes
2
answers
196
views
Empty TokenName Literal Overloading in Week05 Homework2
This doesn't work
mkPolicy oref () ctx = traceIfFalse "UTxO not consumed" hasUTxO &&
traceIfFalse "wrong amount minted" checkMintedAmount
...
- 125
3
votes
2
answers
172
views
Starting a new Plutus Project
I've read a few threads on Cardano Stack exchange on how to start a new Plutus project, but there doesn't seem to be a satisfying answer. I've read the following:
plutus starter course
How to Start a ...
- 33
2
votes
1
answer
58
views
Transaction lifecycle
Working to understand transaction lifecycle. Some understanding of Bitcoin transaction lifecycle perhaps helps here. That is, a transaction is originated from a client request to a node. This node ...
- 183
2
votes
3
answers
130
views
Vim setup of Lars
I was wondering which Vim setup Lars uses in his video, is this perhaps natively available when we use the nix-shell? In lecture two of the third cohort his vim suggests what I guess common used ...
- 1,862
2
votes
1
answer
449
views
How to lock funds in a smart contract?
What I want to do: Send 25 ADA and lock it all at the script address until 1 of the 2 scenarios happen:
100 ADA is sent by Nov 25th (today is Nov 20th) and all ADA at the script address is sent out ...
- 321
2
votes
3
answers
349
views
Sandbox error when running nix build on macOS
I'm trying to get the exercises for week 1 of the plutus pioneer program working. I've installed nix and have set the IOHK caches.
When I try to run nix build -f default.nix plutus.haskell.packages....
2
votes
1
answer
150
views
Getting the address of a parameterized contract from within the validator of another script
Suppose I have one contract, Contract 1, that is parameterized by type
Contract1Params{
tokenName :: BuiltinByteString
}
and I have a minting policy that will only mint a token with tokenName tn ...
- 317
2
votes
2
answers
223
views
/bin/plutus-playground-server: No such file or directory
Can't get plutus-playground-server to start.
plutus-playground-server: for development use only
/nix/store/601kdlvidgan842yfklrmvpbz6a5xkf7-plutus-playground-server/bin/plutus-playground-server: line ...
- 23
1
vote
3
answers
290
views
Error running plutus-playground-client in Linux
I have successfully installed nix, cabal and have setup the IOHK binary cache. I cloned the plutus-app repository and successfully built the Haskell packages and other artifacts with nix. Then running ...
- 198
1
vote
1
answer
650
views
starting nix-shell on mac "Operation not permitted"
I am building natively on intel Mac. After nix-build finished I run nix-shell and it ends with following error:
installing
Installing executable cardano-cli in /nix/store/...
- 13
1
vote
1
answer
213
views
Haskell Language Server - linker error: symbol sqlite3_fts3_may_be_corrupt
When I run haskell-language-server in nix-shell in plutus-pioneer-progam i get this error.
sqlite3_fts3_may_be_corrupt
whilst processing object file
/nix/store/jmhwwzn1yfjzlxavz16afkf1r4shmp8z-...
1
vote
1
answer
64
views
Compiler Error {-# LANGUAGE DataKinds #-}
I try to compile EnglishAuction.hs code in playground web app and keep on getting compiler error.
"[compiler] [E] loadObj "/nix/store/jmhwwzn1yfjzlxavz16afkf1r4shmp8z-
persistent-sqlite-lib-...
- 41
1
vote
1
answer
72
views
Updating counter on the extended UTXO
I would like to be able to update state on the token that is locked in the smart contract address.
My assumption was that using below code
getLockingDatum :: Maybe LockingDatum
getLockingDatum ...
1
vote
1
answer
421
views
PPViewHashesDontMatch and UnspendableUTxONoDatumHash error on redeeming funds from week03 example
I am trying to redeem the funds from the smart contract into the second wallet without running cardano-node (following the instructions from here: https://www.youtube.com/watch?v=ABtffZPoUqU&list=...
- 125
0
votes
1
answer
25
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
1
answer
223
views
macOS Monterey i7, what is the best `nix.conf` file to use?
Does anyone have the recommended nix.conf file to use for macOS Monterey i7?
Following a few different tutorials, my current .conf file looks like:
build-users-group = nixbld
substituters = ...
- 400
0
votes
1
answer
83
views
Unable to start /plutus-apps client application
Error is occurring for MacOS 12.1 Monterey. Please, let me know, if I should include additional details.
I am going through the step noted in this document in order to setup local Plutus app: https://...
0
votes
1
answer
60
views
plutus-playground-server sense of time is incorrect
I think my plutus-playground-server has an incorrect notion of time. I'm working on the homework for lecture 3 and keep running into issues with the simulator.
Here's a screenshot of what I'm ...
0
votes
1
answer
86
views
Using `curSymbol` function in Validator script
supposed I have a mintingpolicy script (simple one time minting policy, parameterizing TxOutRef) and a validator script. I want to validate if the token with correct CurrencySymbol is spent in a ...
0
votes
1
answer
280
views
nix doctor --verbose [FAIL] Multiple versions of nix found in PATH, on MacOS i7
After performing a git commit tag update on plutus-apps, I restarted my computer, and ran nix doctor --verbose and got the following FAIL
[FAIL] Multiple versions of nix found in PATH:
/nix/...
- 400