11
votes
Accepted
What does @ prefix means?
It means type application.
In this case, the function is polymorphic with the following type:
logInfo :: forall a effs. Member (LogMsg a) effs => a -> Eff effs ()
by using TypeApplications ...
- 497
8
votes
I'm having issues with nix-shell
It may help to use IOHK's binary caches.
You can set these up globally for your system by adding/creating these lines in /etc/nix/nix.conf:
substituters = https://hydra.iohk.io https://iohk....
- 1,557
8
votes
Accepted
Q&A English Auction- if a wallets under bids then provides a valid bid, why doesn't it count the second good bid?
It is a bug in the off-chain code. In step 3 in your example, wallet 3 bids under the minimum. This throws an error which triggers a bug that causes all subsequent bids from wallet 3 to be ignored.
It ...
- 520
7
votes
Accepted
npm run start in plutus-playground-client throws several "Could not find module" errors
This solution https://cardano.stackexchange.com/a/6451/2758 is what finally did it for me:
GC_DONT_GC=1 npm run start
instead of just
npm run start
Heads up to anyone else seeing this issue!
Edit: to ...
- 121
6
votes
Accepted
Confused by compilation message in plutus playground (week 5 pioneer program)
The Playground needs some boilerplate added to a module:
mkSchemaDefinitions ''NAMEOFYOURSCHEMA
mkKnownCurrencies []
- 1,816
6
votes
Accepted
Use the week 01 Nix-shell for week 02?
Each week, you should change into the plutus-pioneer-program directory
cd plutus-pioneer-program
Pull the latest changes from upstream
git pull
View the plutus-apps git tag for the week in the cabal....
- 520
4
votes
What is the benefit of installing plutus playground locally?
The Plutus playground deployed on playground.plutus.iohkdev.io is often out of date and might contain bugs that are already fixed in upstream.
- 7,259
4
votes
Accepted
Normal buildtime for "nix-build -A plutus-playground.server"
For me it took roughly 2-4 hours on virtual box but it really depends on what environment your setting it up in. For example a virtual box will take much longer than a computer running on Linux or a ...
- 472
4
votes
Accepted
Logistics of Developing Contracts
All the techniques you have learned for development on the Playground (or using the EmulatorTrace-monad) will still be valuable and relevant for Goguen.
The only difference is that with Goguen, you ...
- 1,816
4
votes
Accepted
Need help installing pioneer-based code on intel Mac (Big Sur)
In step 7, there should be a 2nd line instructing you clone the plutus-apps. Change plutus.git to plutus-apps.git in step 7 to clone it, then run the playground nix-build from the top of that second ...
- 81
4
votes
Where do I find correct and current git checkout?
You can find it in the Plutus Pioneer Program cabal.project file under the plutus-apps dependency entry.
- 1,162
4
votes
(Solved) error:\n Variable not in scope: main :: GHC.Types.IO a0 in English Auction
You have to delete the module declaration at the top of the file. Try that and recompile. Lars mentions this here: https://youtu.be/K61Si6iQ-Js?t=86
P.S. I missed this originally as well!
- 41
4
votes
Accepted
How do you publish on-chain code to mainnet and testnet?
First of all on-chain code isn't stored in the blockchain, the hash of on-chain code is.
To use on-chain validator on testnet or mainnet steps are:
Compile on-chain code into plutus script
Generate ...
- 599
4
votes
Accepted
Incorrect Pub Key from Wallet Emulator
mockWalletPaymentPubKey gives you the public key for a wallet.
For Vesting.hs, you need to use the public key hash.
Try mockWalletPaymentPubKeyHash $ knownWallet 1 instead.
- 520
4
votes
How do users interact with smart contract?
You can use cardano serialization lib to write a webapp using react and CSL to build transactions for your vesting contract, like those actions for vesting funds or retrieving funds. These transaction ...
- 1,162
3
votes
Normal buildtime for "nix-build -A plutus-playground.server"
For me it's as follows:
nix-build -A plutus-playground.server -> 262s
nix-build -A plutus-playground.client -> 25s
nix-shell -> 1715s
This is after properly ...
- 31
3
votes
Plutus Pioneer Program - Problem with plutus playground client
You can try configuring the timeout in cardano/plutus/plutus-playground-client/webpack.config.js
devServer: {
contentBase: path.join(__dirname, "dist"),
compress: true,
port: ...
- 128
3
votes
Deriving Show Compilation Error on Plutus Playground
You can run the Playground locally in Week 3 if you checkout the Plutus branch referenced in the Week03 cabal.project. See the tag option below.
source-repository-package
type: git
location: https:...
- 128
3
votes
Deriving Show Compilation Error on Plutus Playground
I believe your issue is stemming from the fact that the plutus team is updating the plutus library relatively quickly, and since the code written in the plutus-pioneer-program is now a month or two ...
- 1,174
3
votes
Accepted
/bin/plutus-playground-server: No such file or directory
I found a solution for this that you can read in the document I wrote to setup Plutus dev environment on your local machine ( https://www.punkbit.com/hacking/plutus-developer-environment-setup-on-...
- 178
3
votes
Accepted
What is the GC_DONT_GC=1 variable for when running the Plutus Playground locally?
GC_DONT_GC=1 disables the boehm garbage collector in nix. There are edge cases that our nix expressions can hit, which cause nix to segfault. Disabling the garbage collector in nix "fixes" ...
- 359
2
votes
Writing basic validator scripts
Although there may have been changes, this remains a valid question.
The code shown in the question is the boilerplate code that accompanies a validator implementation for on-chain execution. A simple ...
- 480
2
votes
I'm having issues with nix-shell
There are multiple different types of nix.conf files in the $PATH, even when I made one globally. So What I initial did was replace all of them with the IOHK's binary caches, and from there it worked.
- 687
2
votes
Test-Focused EvaluatorTrace Monad?
There are now test capabilities in the Plutus.Contract.Test module which uses the Tasty library.
This is explained more fully in the unit tests section of lecture 8 of iteration 1 of the Plutus ...
- 524
2
votes
Setting up Plutus environment for Apple Silicon computer
I'm running an M1 Pro with Monterey and have everything up and running correctly, so it's definitely possible!
This github guide is very useful: Cardano Plutus apps install.
The new M1's use AMD ...
- 51
2
votes
Accepted
Choosing Ubuntu over WSL for Plutus development
WSL is a hack for running Linux programs. Plutus Playground is very stable once it is installed on a stable platform. I had hosted a playground without any issue for more than a month that too without ...
- 1,834
2
votes
Accepted
Plutus pioneer program - Lecture #1 - Can't understand behaviour of transactions
If I recall correctly there is some problem/bug in the playground, such that when a wallet/transaction fails, no more transactions from that wallet is accepted.
But as you noted when first bid is ...
- 156
2
votes
segmentation fault when building Plutus-playground.server
Could you try running GC_DONT_GC=1 nix-build -A plutus-playground.server.
- 21
2
votes
Accepted
Unable to start /plutus-apps client application
Fortunately, someone in the discord had this exact same problem. I had suggested running nix-build, but that errored out. Apparently the solution was to set this first, before running the command:
...
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