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Lars Brünjes 2021-04-23 17:56:06 +02:00
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21
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{
"name": "Plutus Starter Project",
"image": "plutus-devcontainer:latest",
"mounts": [
// This shares cabal's remote repository state with the host. We don't mount the whole of '.cabal', because
// 1. '.cabal/config' contains absolute paths that will only make sense on the host, and
// 2. '.cabal/store' is not necessarily portable to different version of cabal etc.
"source=${localEnv:HOME}/.cabal/packages,target=/root/.cabal/packages,type=bind,consistency=cached",
],
"settings": {
// Note: don't change from bash so it runs .bashrc
"terminal.integrated.shell.linux": "/bin/bash"
},
// IDs of extensions inside container
"extensions": [
"haskell.haskell"
],
}

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dist-newstyle/

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-- public static int foo() {
-- ...
-- }
--
-- ...
--
-- ... foo() ... foo()
-- foo :: Int
-- foo = ...
-- let x = foo in ... x ... x ...
-- ... foo ... foo ...
-- foo :: IO Int
-- foo = ...
main :: IO ()
main = bar -- putStrLn "Hello, world!"
bar :: IO ()
bar = getLine >>= \s ->
getLine >>= \t ->
putStrLn (s ++ t)

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index-state: 2021-02-24T00:00:00Z
packages: ./.
-- You never, ever, want this.
write-ghc-environment-files: never
-- Always build tests and benchmarks.
tests: true
benchmarks: true
source-repository-package
type: git
location: https://github.com/input-output-hk/plutus.git
subdir:
freer-extras
playground-common
plutus-core
plutus-contract
plutus-ledger
plutus-ledger-api
plutus-tx
plutus-tx-plugin
prettyprinter-configurable
quickcheck-dynamic
tag: 47bee0d683857655d60c230a8b25ab7058c54d55
-- The following sections are copied from the 'plutus' repository cabal.project at the revision
-- given above.
-- This is necessary because the 'plutus' libraries depend on a number of other libraries which are
-- not on Hackage, and so need to be pulled in as `source-repository-package`s themselves. Make sure to
-- re-update this section from the template when you do an upgrade.
package eventful-sql-common
ghc-options: -XDerivingStrategies -XStandaloneDeriving -XUndecidableInstances -XDataKinds -XFlexibleInstances
allow-newer:
-- Has a commit to allow newer aeson, not on Hackage yet
monoidal-containers:aeson
-- Pins to an old version of Template Haskell, unclear if/when it will be updated
, size-based:template-haskell
-- The following two dependencies are needed by plutus.
, eventful-sql-common:persistent
, eventful-sql-common:persistent-template
constraints:
-- aws-lambda-haskell-runtime-wai doesn't compile with newer versions
aws-lambda-haskell-runtime <= 3.0.3
-- Needs some patches, but upstream seems to be fairly dead (no activity in > 1 year)
source-repository-package
type: git
location: https://github.com/shmish111/purescript-bridge.git
tag: 6a92d7853ea514be8b70bab5e72077bf5a510596
source-repository-package
type: git
location: https://github.com/shmish111/servant-purescript.git
tag: a76104490499aa72d40c2790d10e9383e0dbde63
source-repository-package
type: git
location: https://github.com/input-output-hk/cardano-crypto.git
tag: f73079303f663e028288f9f4a9e08bcca39a923e
-- Needs a fix (https://github.com/wenkokke/unlit/pull/11) and a Hackage release
source-repository-package
type: git
location: https://github.com/michaelpj/unlit.git
tag: 9ca1112093c5ffd356fc99c7dafa080e686dd748
source-repository-package
type: git
location: https://github.com/input-output-hk/cardano-base
tag: 4251c0bb6e4f443f00231d28f5f70d42876da055
subdir:
binary
binary/test
slotting
cardano-crypto-class
cardano-crypto-praos
source-repository-package
type: git
location: https://github.com/input-output-hk/cardano-prelude
tag: ee4e7b547a991876e6b05ba542f4e62909f4a571
subdir:
cardano-prelude
cardano-prelude-test
source-repository-package
type: git
location: https://github.com/input-output-hk/ouroboros-network
tag: 6cb9052bde39472a0555d19ade8a42da63d3e904
subdir:
typed-protocols
typed-protocols-examples
ouroboros-network
ouroboros-network-testing
ouroboros-network-framework
io-sim
io-sim-classes
network-mux
Win32-network
source-repository-package
type: git
location: https://github.com/input-output-hk/iohk-monitoring-framework
tag: a89c38ed5825ba17ca79fddb85651007753d699d
subdir:
iohk-monitoring
tracer-transformers
contra-tracer
plugins/backend-ekg
source-repository-package
type: git
location: https://github.com/input-output-hk/cardano-ledger-specs
tag: 097890495cbb0e8b62106bcd090a5721c3f4b36f
subdir:
byron/chain/executable-spec
byron/crypto
byron/crypto/test
byron/ledger/executable-spec
byron/ledger/impl
byron/ledger/impl/test
semantics/executable-spec
semantics/small-steps-test
shelley/chain-and-ledger/dependencies/non-integer
shelley/chain-and-ledger/executable-spec
shelley-ma/impl
source-repository-package
type: git
location: https://github.com/input-output-hk/goblins
tag: cde90a2b27f79187ca8310b6549331e59595e7ba

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cradle:
cabal:
- path: "./src"
component: "lib:plutus-pioneer-program-week04"
- path: "./app/hello.hs"
component: "exe:hello"

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code/week04/plutus-pioneer-program-week04.cabal Normal file
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Cabal-Version: 2.4
Name: plutus-pioneer-program-week04
Version: 0.1.0.0
Author: Lars Bruenjes
Maintainer: brunjlar@gmail.com
Build-Type: Simple
Copyright: © 2021 Lars Bruenjes
License: Apache-2.0
License-files: LICENSE
library
hs-source-dirs: src
exposed-modules: Week04.Either
, Week04.Maybe
, Week04.State
, Week04.Trace
build-depends: aeson
, base ^>=4.14.1.0
, containers
, freer-extras
, playground-common
, plutus-contract
, plutus-ledger
, plutus-ledger-api
, plutus-tx-plugin
, plutus-tx
, text
default-language: Haskell2010
ghc-options: -Wall -fobject-code -fno-ignore-interface-pragmas -fno-omit-interface-pragmas -fno-strictness -fno-spec-constr -fno-specialise
executable hello
hs-source-dirs: app
main-is: hello.hs
build-depends: base ^>=4.14.1.0
default-language: Haskell2010
ghc-options: -Wall -O2

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module Week04.Either where
import Text.Read (readMaybe)
readEither :: Read a => String -> Either String a
readEither s = case readMaybe s of
Nothing -> Left $ "can't parse: " ++ s
Just a -> Right a
foo :: String -> String -> String -> Either String Int
foo x y z = case readEither x of
Left err -> Left err
Right k -> case readEither y of
Left err -> Left err
Right l -> case readEither z of
Left err -> Left err
Right m -> Right (k + l + m)
bindEither :: Either String a -> (a -> Either String b) -> Either String b
bindEither (Left err) _ = Left err
bindEither (Right x) f = f x
foo' :: String -> String -> String -> Either String Int
foo' x y z = readEither x `bindEither` \k ->
readEither y `bindEither` \l ->
readEither z `bindEither` \m ->
Right (k + l + m)

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module Week04.Maybe where
import Text.Read (readMaybe)
foo :: String -> String -> String -> Maybe Int
foo x y z = case readMaybe x of
Nothing -> Nothing
Just k -> case readMaybe y of
Nothing -> Nothing
Just l -> case readMaybe z of
Nothing -> Nothing
Just m -> Just (k + l + m)
bindMaybe :: Maybe a -> (a -> Maybe b) -> Maybe b
bindMaybe Nothing _ = Nothing
bindMaybe (Just x) f = f x
foo' :: String -> String -> String -> Maybe Int
foo' x y z = readMaybe x `bindMaybe` \k ->
readMaybe y `bindMaybe` \l ->
readMaybe z `bindMaybe` \m ->
Just (k + l + m)

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module Week04.State where

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module Week04.Trace where
import Control.Monad.Freer.Extras as Extras
import Data.Functor (void)
import Data.Text (Text)
import Plutus.Contract as Contract
import Plutus.Trace.Emulator as Emulator
import Wallet.Emulator.Wallet
test :: IO ()
test = runEmulatorTraceIO myTrace
myTrace :: EmulatorTrace ()
myTrace = do
h <- activateContractWallet (Wallet 1) myContract
void $ Emulator.waitNSlots 1
xs <- Emulator.observableState h
Extras.logInfo $ show xs
myContract :: Contract [Int] BlockchainActions Text ()
myContract = do
Contract.logInfo "logging..."
tell [1]
void $ Contract.waitNSlots 10
myContract