Merge branch 'solutions'

This commit is contained in:
Lars Brünjes 2021-07-14 21:16:38 +02:00
commit 5430da3941
13 changed files with 1263 additions and 0 deletions

View file

@ -18,10 +18,17 @@
- Low-level, untyped on-chain validation scripts.
- High-level, typed on-chain validation scripts.
- [Lecture #3](https://youtu.be/6_rfCCY9_gY)
- Script contexts.
- Time handling.
- Parameterized contracts.
## Code Examples
- Lecture #1: [English Auction](code/week01)
- Lecture #2: [Simple validation](code/week02)
- Lecture #2: [Script Context & Parameterized Contracts](code/week03)
## Exercises
@ -44,6 +51,11 @@
- Fix and complete the code in the [Homework1](code/week02/src/Week02/Homework1.hs) module.
- Fix and complete the code in the [Homework2](code/week02/src/Week02/Homework2.hs) module.
- Week #3
- Fix and complete the code in the [Homework1](code/week03/src/Week03/Homework1.hs) module.
- Fix and complete the code in the [Homework2](code/week03/src/Week03/Homework2.hs) module.
## Some Plutus Modules
- [`Language.Marlowe.Semantics`](https://github.com/input-output-hk/plutus/blob/master/marlowe/src/Language/Marlowe/Semantics.hs), contains Marlowe types and semantics.
@ -51,6 +63,7 @@
- [`Plutus.Contract.Test`](https://github.com/input-output-hk/plutus/blob/master/plutus-contract/src/Plutus/Contract/Test.hs), provides various ways to write tests for Plutus contracts.
- [`Plutus.Contract.Test.ContractModel`](https://github.com/input-output-hk/plutus/blob/master/plutus-contract/src/Plutus/Contract/Test/ContractModel.hs), support for property based testing of Plutus contracts.
- [`Plutus.Contracts.Uniswap`](https://github.com/input-output-hk/plutus/blob/master/plutus-use-cases/src/Plutus/Contracts/Uniswap.hs), an implementation of Uniswap in Plutus.
- [`Plutus.Ledger.TimeSlot`](https://github.com/input-output-hk/plutus/blob/master/plutus-ledger/src/Ledger/TimeSlot.hs), conversions between `Slot` and `POSIXTime`.
- [`Plutus.PAB.Webserver.API`](https://github.com/input-output-hk/plutus/blob/master/plutus-pab/src/Plutus/PAB/Webserver/API.hs), contains the HTTP-interface provided by the PAB.
- [`Plutus.Trace.Emulator`](https://github.com/input-output-hk/plutus/blob/master/plutus-contract/src/Plutus/Trace/Emulator.hs), contains types and functions related to traces.
- [`Plutus.V1.Ledger.Ada`](https://github.com/input-output-hk/plutus/blob/master/plutus-ledger-api/src/Plutus/V1/Ledger/Ada.hs), contains support for the Ada currency.

View file

@ -0,0 +1,23 @@
{
"name": "Plutus Starter Project",
"image": "plutus-devcontainer:latest",
"remoteUser": "plutus",
"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=/home/plutus/.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"
],
}

1
code/week03/.gitignore vendored Normal file
View file

@ -0,0 +1 @@
dist-newstyle/

201
code/week03/LICENSE Normal file
View file

@ -0,0 +1,201 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
excluding communication that is conspicuously marked or otherwise
designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
publicly display, publicly perform, sublicense, and distribute the
Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
by such Contributor that are necessarily infringed by their
Contribution(s) alone or by combination of their Contribution(s)
with the Work to which such Contribution(s) was submitted. If You
institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work
or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
the Derivative Works; and
(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
include a readable copy of the attribution notices contained
within such NOTICE file, excluding those notices that do not
pertain to any part of the Derivative Works, in at least one
of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
documentation, if provided along with the Derivative Works; or,
within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
or as an addendum to the NOTICE text from the Work, provided
that such additional attribution notices cannot be construed
as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright [yyyy] [name of copyright owner]
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

193
code/week03/cabal.project Normal file
View file

@ -0,0 +1,193 @@
index-state: 2021-07-07T00:00:00Z
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-chain-index
plutus-core
plutus-contract
plutus-ledger
plutus-ledger-api
plutus-tx
plutus-tx-plugin
prettyprinter-configurable
quickcheck-dynamic
word-array
tag: 219992289c6615e197069d022735cb4059d43229
-- 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.
-- This is also needed so evenful-sql-common will build with a
-- newer version of persistent. See stack.yaml for the mirrored
-- configuration.
package eventful-sql-common
ghc-options: -XDerivingStrategies -XStandaloneDeriving -XUndecidableInstances -XDataKinds -XFlexibleInstances -XMultiParamTypeClasses
allow-newer:
-- 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
, ouroboros-consensus-byron:formatting
, beam-core:aeson
, beam-sqlite:aeson
, beam-sqlite:dlist
, beam-migrate:aeson
constraints:
-- big breaking change here, inline-r doens't have an upper bound
singletons < 3.0
-- breaks eventful even more than it already was
, persistent-template < 2.12
-- bizarre issue: in earlier versions they define their own 'GEq', in newer
-- ones they reuse the one from 'some', but there isn't e.g. a proper version
-- constraint from dependent-sum-template (which is the library we actually use).
, dependent-sum > 0.6.2.0
-- See the note on nix/pkgs/default.nix:agdaPackages for why this is here.
-- (NOTE this will change to ieee754 in newer versions of nixpkgs).
extra-packages: ieee, filemanip
-- Drops an instance breaking our code. Should be released to Hackage eventually.
source-repository-package
type: git
location: https://github.com/Quid2/flat.git
tag: 95e5d7488451e43062ca84d5376b3adcc465f1cd
-- 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: ce8f1934e4b6252084710975bd9bbc0a4648ece4
source-repository-package
type: git
location: https://github.com/input-output-hk/cardano-base
tag: a715c7f420770b70bbe95ca51d3dec83866cb1bd
subdir:
binary
binary/test
slotting
cardano-crypto-class
cardano-crypto-praos
cardano-crypto-tests
strict-containers
source-repository-package
type: git
location: https://github.com/input-output-hk/cardano-prelude
tag: fd773f7a58412131512b9f694ab95653ac430852
subdir:
cardano-prelude
cardano-prelude-test
source-repository-package
type: git
location: https://github.com/input-output-hk/ouroboros-network
tag: e338f2cf8e1078fbda9555dd2b169c6737ef6774
subdir:
monoidal-synchronisation
typed-protocols
typed-protocols-examples
ouroboros-network
ouroboros-network-testing
ouroboros-network-framework
ouroboros-consensus
ouroboros-consensus-byron
ouroboros-consensus-cardano
ouroboros-consensus-shelley
io-sim
io-classes
network-mux
source-repository-package
type: git
location: https://github.com/input-output-hk/iohk-monitoring-framework
tag: 34abfb7f4f5610cabb45396e0496472446a0b2ca
subdir:
iohk-monitoring
tracer-transformers
contra-tracer
plugins/backend-aggregation
plugins/backend-ekg
plugins/backend-monitoring
plugins/backend-trace-forwarder
plugins/scribe-systemd
source-repository-package
type: git
location: https://github.com/input-output-hk/cardano-ledger-specs
tag: b8f1ebb46a91f1c634e616feb89ae34de5937e17
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/chain-and-ledger/shelley-spec-ledger-test
shelley-ma/impl
cardano-ledger-core
alonzo/impl
-- A lot of plutus dependencies have to be synchronized with the dependencies of
-- cardano-node. If you update cardano-node, please make sure that all dependencies
-- of cardano-node are also updated.
source-repository-package
type: git
location: https://github.com/input-output-hk/cardano-node.git
tag: f3ef4ed72894499160f2330b91572a159005c148
subdir:
cardano-api
cardano-node
cardano-cli
cardano-config
source-repository-package
type: git
location: https://github.com/input-output-hk/Win32-network
tag: 94153b676617f8f33abe8d8182c37377d2784bd1
source-repository-package
type: git
location: https://github.com/input-output-hk/hedgehog-extras
tag: 8bcd3c9dc22cc44f9fcfe161f4638a384fc7a187
-- The following dependencies are not mirrored in the
-- stack.yaml file, but they are needed regardless by cabal.
source-repository-package
type: git
location: https://github.com/input-output-hk/goblins
tag: cde90a2b27f79187ca8310b6549331e59595e7ba

4
code/week03/hie.yaml Normal file
View file

@ -0,0 +1,4 @@
cradle:
cabal:
- path: "./src"
component: "lib:plutus-pioneer-program-week03"

View file

@ -0,0 +1,31 @@
Cabal-Version: 2.4
Name: plutus-pioneer-program-week03
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: Week03.Homework1
, Week03.Homework2
, Week03.Parameterized
, Week03.Solution1
, Week03.Solution2
, Week03.Vesting
build-depends: aeson
, base ^>=4.14.1.0
, containers
, data-default
, 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

View file

@ -0,0 +1,138 @@
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveAnyClass #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE NoImplicitPrelude #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE TypeApplications #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE TypeOperators #-}
{-# OPTIONS_GHC -fno-warn-unused-imports #-}
module Week03.Homework1 where
import Control.Monad hiding (fmap)
import Data.Aeson (ToJSON, FromJSON)
import Data.Map as Map
import Data.Text (Text)
import Data.Void (Void)
import GHC.Generics (Generic)
import Plutus.Contract
import qualified PlutusTx
import PlutusTx.Prelude hiding (unless)
import Ledger hiding (singleton)
import Ledger.Constraints as Constraints
import qualified Ledger.Typed.Scripts as Scripts
import Ledger.Ada as Ada
import Playground.Contract (printJson, printSchemas, ensureKnownCurrencies, stage, ToSchema)
import Playground.TH (mkKnownCurrencies, mkSchemaDefinitions)
import Playground.Types (KnownCurrency (..))
import Prelude (IO)
import qualified Prelude as P
import Text.Printf (printf)
data VestingDatum = VestingDatum
{ beneficiary1 :: PubKeyHash
, beneficiary2 :: PubKeyHash
, deadline :: POSIXTime
} deriving P.Show
PlutusTx.unstableMakeIsData ''VestingDatum
{-# INLINABLE mkValidator #-}
-- This should validate if either beneficiary1 has signed the transaction and the current slot is before or at the deadline
-- or if beneficiary2 has signed the transaction and the deadline has passed.
mkValidator :: VestingDatum -> () -> ScriptContext -> Bool
mkValidator _ _ _ = False -- FIX ME!
data Vesting
instance Scripts.ValidatorTypes Vesting where
type instance DatumType Vesting = VestingDatum
type instance RedeemerType Vesting = ()
typedValidator :: Scripts.TypedValidator Vesting
typedValidator = Scripts.mkTypedValidator @Vesting
$$(PlutusTx.compile [|| mkValidator ||])
$$(PlutusTx.compile [|| wrap ||])
where
wrap = Scripts.wrapValidator @VestingDatum @()
validator :: Validator
validator = Scripts.validatorScript typedValidator
valHash :: Ledger.ValidatorHash
valHash = Scripts.validatorHash typedValidator
scrAddress :: Ledger.Address
scrAddress = scriptAddress validator
data GiveParams = GiveParams
{ gpBeneficiary :: !PubKeyHash
, gpDeadline :: !POSIXTime
, gpAmount :: !Integer
} deriving (Generic, ToJSON, FromJSON, ToSchema)
type VestingSchema =
Endpoint "give" GiveParams
.\/ Endpoint "grab" ()
give :: AsContractError e => GiveParams -> Contract w s e ()
give gp = do
pkh <- pubKeyHash <$> ownPubKey
let dat = VestingDatum
{ beneficiary1 = gpBeneficiary gp
, beneficiary2 = pkh
, deadline = gpDeadline gp
}
tx = mustPayToTheScript dat $ Ada.lovelaceValueOf $ gpAmount gp
ledgerTx <- submitTxConstraints typedValidator tx
void $ awaitTxConfirmed $ txId ledgerTx
logInfo @P.String $ printf "made a gift of %d lovelace to %s with deadline %s"
(gpAmount gp)
(P.show $ gpBeneficiary gp)
(P.show $ gpDeadline gp)
grab :: forall w s e. AsContractError e => Contract w s e ()
grab = do
now <- currentTime
pkh <- pubKeyHash <$> ownPubKey
utxos <- utxoAt scrAddress
let utxos1 = Map.filter (isSuitable $ \dat -> beneficiary1 dat == pkh && now <= deadline dat) utxos
utxos2 = Map.filter (isSuitable $ \dat -> beneficiary2 dat == pkh && now > deadline dat) utxos
logInfo @P.String $ printf "found %d gift(s) to grab" (Map.size utxos1 P.+ Map.size utxos2)
unless (Map.null utxos1) $ do
let orefs = fst <$> Map.toList utxos1
lookups = Constraints.unspentOutputs utxos1 P.<>
Constraints.otherScript validator
tx :: TxConstraints Void Void
tx = mconcat [mustSpendScriptOutput oref $ Redeemer $ PlutusTx.toData () | oref <- orefs] P.<>
mustValidateIn (to now)
void $ submitTxConstraintsWith @Void lookups tx
unless (Map.null utxos2) $ do
let orefs = fst <$> Map.toList utxos2
lookups = Constraints.unspentOutputs utxos2 P.<>
Constraints.otherScript validator
tx :: TxConstraints Void Void
tx = mconcat [mustSpendScriptOutput oref $ Redeemer $ PlutusTx.toData () | oref <- orefs] P.<>
mustValidateIn (from now)
void $ submitTxConstraintsWith @Void lookups tx
where
isSuitable :: (VestingDatum -> Bool) -> TxOutTx -> Bool
isSuitable p o = case txOutDatumHash $ txOutTxOut o of
Nothing -> False
Just h -> case Map.lookup h $ txData $ txOutTxTx o of
Nothing -> False
Just (Datum e) -> maybe False p $ PlutusTx.fromData e
endpoints :: Contract () VestingSchema Text ()
endpoints = (give' `select` grab') >> endpoints
where
give' = endpoint @"give" >>= give
grab' = endpoint @"grab" >> grab
mkSchemaDefinitions ''VestingSchema
mkKnownCurrencies []

View file

@ -0,0 +1,112 @@
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveAnyClass #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE NoImplicitPrelude #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE TypeApplications #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE TypeOperators #-}
module Week03.Homework2 where
import Control.Monad hiding (fmap)
import Data.Aeson (ToJSON, FromJSON)
import Data.Map as Map
import Data.Text (Text)
import Data.Void (Void)
import GHC.Generics (Generic)
import Plutus.Contract
import qualified PlutusTx
import PlutusTx.Prelude hiding (Semigroup(..), unless)
import Ledger hiding (singleton)
import Ledger.Constraints as Constraints
import qualified Ledger.Typed.Scripts as Scripts
import Ledger.Ada as Ada
import Playground.Contract (printJson, printSchemas, ensureKnownCurrencies, stage, ToSchema)
import Playground.TH (mkKnownCurrencies, mkSchemaDefinitions)
import Playground.Types (KnownCurrency (..))
import Prelude (IO, Semigroup (..), Show (..), String, undefined)
import Text.Printf (printf)
{-# OPTIONS_GHC -fno-warn-unused-imports #-}
{-# INLINABLE mkValidator #-}
mkValidator :: PubKeyHash -> POSIXTime -> () -> ScriptContext -> Bool
mkValidator _ _ _ _ = False -- FIX ME!
data Vesting
instance Scripts.ValidatorTypes Vesting where
type instance DatumType Vesting = POSIXTime
type instance RedeemerType Vesting = ()
typedValidator :: PubKeyHash -> Scripts.TypedValidator Vesting
typedValidator = undefined -- IMPLEMENT ME!
validator :: PubKeyHash -> Validator
validator = undefined -- IMPLEMENT ME!
scrAddress :: PubKeyHash -> Ledger.Address
scrAddress = undefined -- IMPLEMENT ME!
data GiveParams = GiveParams
{ gpBeneficiary :: !PubKeyHash
, gpDeadline :: !POSIXTime
, gpAmount :: !Integer
} deriving (Generic, ToJSON, FromJSON, ToSchema)
type VestingSchema =
Endpoint "give" GiveParams
.\/ Endpoint "grab" ()
give :: AsContractError e => GiveParams -> Contract w s e ()
give gp = do
let p = gpBeneficiary gp
d = gpDeadline gp
tx = mustPayToTheScript d $ Ada.lovelaceValueOf $ gpAmount gp
ledgerTx <- submitTxConstraints (typedValidator p) tx
void $ awaitTxConfirmed $ txId ledgerTx
logInfo @String $ printf "made a gift of %d lovelace to %s with deadline %s"
(gpAmount gp)
(show $ gpBeneficiary gp)
(show $ gpDeadline gp)
grab :: forall w s e. AsContractError e => Contract w s e ()
grab = do
now <- currentTime
pkh <- pubKeyHash <$> ownPubKey
utxos <- Map.filter (isSuitable now) <$> utxoAt (scrAddress pkh)
if Map.null utxos
then logInfo @String $ "no gifts available"
else do
let orefs = fst <$> Map.toList utxos
lookups = Constraints.unspentOutputs utxos <>
Constraints.otherScript (validator pkh)
tx :: TxConstraints Void Void
tx = mconcat [mustSpendScriptOutput oref $ Redeemer $ PlutusTx.toData () | oref <- orefs] <>
mustValidateIn (from now)
ledgerTx <- submitTxConstraintsWith @Void lookups tx
void $ awaitTxConfirmed $ txId ledgerTx
logInfo @String $ "collected gifts"
where
isSuitable :: POSIXTime -> TxOutTx -> Bool
isSuitable now o = case txOutDatumHash $ txOutTxOut o of
Nothing -> False
Just h -> case Map.lookup h $ txData $ txOutTxTx o of
Nothing -> False
Just (Datum e) -> case PlutusTx.fromData e of
Nothing -> False
Just d -> d <= now
endpoints :: Contract () VestingSchema Text ()
endpoints = (give' `select` grab') >> endpoints
where
give' = endpoint @"give" >>= give
grab' = endpoint @"grab" >> grab
mkSchemaDefinitions ''VestingSchema
mkKnownCurrencies []

View file

@ -0,0 +1,137 @@
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveAnyClass #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE NoImplicitPrelude #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE TypeApplications #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE TypeOperators #-}
{-# OPTIONS_GHC -fno-warn-unused-imports #-}
module Week03.Parameterized where
import Control.Monad hiding (fmap)
import Data.Aeson (ToJSON, FromJSON)
import Data.Map as Map
import Data.Text (Text)
import Data.Void (Void)
import GHC.Generics (Generic)
import Plutus.Contract
import PlutusTx (Data (..))
import qualified PlutusTx
import PlutusTx.Prelude hiding (Semigroup(..), unless)
import Ledger hiding (singleton)
import Ledger.Constraints as Constraints
import qualified Ledger.Typed.Scripts as Scripts
import Ledger.Ada as Ada
import Playground.Contract (printJson, printSchemas, ensureKnownCurrencies, stage, ToSchema)
import Playground.TH (mkKnownCurrencies, mkSchemaDefinitions)
import Playground.Types (KnownCurrency (..))
import Prelude (IO, Semigroup (..), Show (..), String)
import Text.Printf (printf)
data VestingParam = VestingParam
{ beneficiary :: PubKeyHash
, deadline :: POSIXTime
} deriving Show
PlutusTx.makeLift ''VestingParam
{-# INLINABLE mkValidator #-}
mkValidator :: VestingParam -> () -> () -> ScriptContext -> Bool
mkValidator p () () ctx = traceIfFalse "beneficiary's signature missing" signedByBeneficiary &&
traceIfFalse "deadline not reached" deadlineReached
where
info :: TxInfo
info = scriptContextTxInfo ctx
signedByBeneficiary :: Bool
signedByBeneficiary = txSignedBy info $ beneficiary p
deadlineReached :: Bool
deadlineReached = contains (from $ deadline p) $ txInfoValidRange info
data Vesting
instance Scripts.ValidatorTypes Vesting where
type instance DatumType Vesting = ()
type instance RedeemerType Vesting = ()
typedValidator :: VestingParam -> Scripts.TypedValidator Vesting
typedValidator p = Scripts.mkTypedValidator @Vesting
($$(PlutusTx.compile [|| mkValidator ||]) `PlutusTx.applyCode` PlutusTx.liftCode p)
$$(PlutusTx.compile [|| wrap ||])
where
wrap = Scripts.wrapValidator @() @()
validator :: VestingParam -> Validator
validator = Scripts.validatorScript . typedValidator
valHash :: VestingParam -> Ledger.ValidatorHash
valHash = Scripts.validatorHash . typedValidator
scrAddress :: VestingParam -> Ledger.Address
scrAddress = scriptAddress . validator
data GiveParams = GiveParams
{ gpBeneficiary :: !PubKeyHash
, gpDeadline :: !POSIXTime
, gpAmount :: !Integer
} deriving (Generic, ToJSON, FromJSON, ToSchema)
type VestingSchema =
Endpoint "give" GiveParams
.\/ Endpoint "grab" POSIXTime
give :: AsContractError e => GiveParams -> Contract w s e ()
give gp = do
let p = VestingParam
{ beneficiary = gpBeneficiary gp
, deadline = gpDeadline gp
}
tx = mustPayToTheScript () $ Ada.lovelaceValueOf $ gpAmount gp
ledgerTx <- submitTxConstraints (typedValidator p) tx
void $ awaitTxConfirmed $ txId ledgerTx
logInfo @String $ printf "made a gift of %d lovelace to %s with deadline %s"
(gpAmount gp)
(show $ gpBeneficiary gp)
(show $ gpDeadline gp)
grab :: forall w s e. AsContractError e => POSIXTime -> Contract w s e ()
grab d = do
now <- currentTime
pkh <- pubKeyHash <$> ownPubKey
if now < d
then logInfo @String $ "too early"
else do
let p = VestingParam
{ beneficiary = pkh
, deadline = d
}
utxos <- utxoAt $ scrAddress p
if Map.null utxos
then logInfo @String $ "no gifts available"
else do
let orefs = fst <$> Map.toList utxos
lookups = Constraints.unspentOutputs utxos <>
Constraints.otherScript (validator p)
tx :: TxConstraints Void Void
tx = mconcat [mustSpendScriptOutput oref $ Redeemer $ PlutusTx.toData () | oref <- orefs] <>
mustValidateIn (from now)
ledgerTx <- submitTxConstraintsWith @Void lookups tx
void $ awaitTxConfirmed $ txId ledgerTx
logInfo @String $ "collected gifts"
endpoints :: Contract () VestingSchema Text ()
endpoints = (give' `select` grab') >> endpoints
where
give' = endpoint @"give" >>= give
grab' = endpoint @"grab" >>= grab
mkSchemaDefinitions ''VestingSchema
mkKnownCurrencies []

View file

@ -0,0 +1,145 @@
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveAnyClass #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE NoImplicitPrelude #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE TypeApplications #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE TypeOperators #-}
{-# OPTIONS_GHC -fno-warn-unused-imports #-}
module Week03.Solution1 where
import Control.Monad hiding (fmap)
import Data.Aeson (ToJSON, FromJSON)
import Data.Map as Map
import Data.Text (Text)
import Data.Void (Void)
import GHC.Generics (Generic)
import Plutus.Contract
import qualified PlutusTx
import PlutusTx.Prelude hiding (unless)
import Ledger hiding (singleton)
import Ledger.Constraints as Constraints
import qualified Ledger.Typed.Scripts as Scripts
import Ledger.Ada as Ada
import Playground.Contract (printJson, printSchemas, ensureKnownCurrencies, stage, ToSchema)
import Playground.TH (mkKnownCurrencies, mkSchemaDefinitions)
import Playground.Types (KnownCurrency (..))
import Prelude (IO, Show (..), String)
import qualified Prelude as P
import Text.Printf (printf)
data VestingDatum = VestingDatum
{ beneficiary1 :: PubKeyHash
, beneficiary2 :: PubKeyHash
, deadline :: POSIXTime
} deriving Show
PlutusTx.unstableMakeIsData ''VestingDatum
{-# INLINABLE mkValidator #-}
mkValidator :: VestingDatum -> () -> ScriptContext -> Bool
mkValidator dat () ctx
| (beneficiary1 dat `elem` sigs) && (to (deadline dat) `contains` range) = True
| (beneficiary2 dat `elem` sigs) && (from (1 + deadline dat) `contains` range) = True
| otherwise = False
where
info :: TxInfo
info = scriptContextTxInfo ctx
sigs :: [PubKeyHash]
sigs = txInfoSignatories info
range :: POSIXTimeRange
range = txInfoValidRange info
data Vesting
instance Scripts.ValidatorTypes Vesting where
type instance DatumType Vesting = VestingDatum
type instance RedeemerType Vesting = ()
typedValidator :: Scripts.TypedValidator Vesting
typedValidator = Scripts.mkTypedValidator @Vesting
$$(PlutusTx.compile [|| mkValidator ||])
$$(PlutusTx.compile [|| wrap ||])
where
wrap = Scripts.wrapValidator @VestingDatum @()
validator :: Validator
validator = Scripts.validatorScript typedValidator
scrAddress :: Ledger.Address
scrAddress = scriptAddress validator
data GiveParams = GiveParams
{ gpBeneficiary :: !PubKeyHash
, gpDeadline :: !POSIXTime
, gpAmount :: !Integer
} deriving (Generic, ToJSON, FromJSON, ToSchema)
type VestingSchema =
Endpoint "give" GiveParams
.\/ Endpoint "grab" ()
give :: AsContractError e => GiveParams -> Contract w s e ()
give gp = do
pkh <- pubKeyHash <$> ownPubKey
let dat = VestingDatum
{ beneficiary1 = gpBeneficiary gp
, beneficiary2 = pkh
, deadline = gpDeadline gp
}
tx = mustPayToTheScript dat $ Ada.lovelaceValueOf $ gpAmount gp
ledgerTx <- submitTxConstraints typedValidator tx
void $ awaitTxConfirmed $ txId ledgerTx
logInfo @String $ printf "made a gift of %d lovelace to %s with deadline %s"
(gpAmount gp)
(show $ gpBeneficiary gp)
(show $ gpDeadline gp)
grab :: forall w s e. AsContractError e => Contract w s e ()
grab = do
now <- currentTime
pkh <- pubKeyHash <$> ownPubKey
utxos <- utxoAt scrAddress
let utxos1 = Map.filter (isSuitable $ \dat -> beneficiary1 dat == pkh && now <= deadline dat) utxos
utxos2 = Map.filter (isSuitable $ \dat -> beneficiary2 dat == pkh && now > deadline dat) utxos
logInfo @String $ printf "found %d gift(s) to grab" (Map.size utxos1 P.+ Map.size utxos2)
unless (Map.null utxos1) $ do
let orefs = fst <$> Map.toList utxos1
lookups = Constraints.unspentOutputs utxos1 P.<>
Constraints.otherScript validator
tx :: TxConstraints Void Void
tx = mconcat [mustSpendScriptOutput oref $ Redeemer $ PlutusTx.toData () | oref <- orefs] P.<>
mustValidateIn (to now)
void $ submitTxConstraintsWith @Void lookups tx
unless (Map.null utxos2) $ do
let orefs = fst <$> Map.toList utxos2
lookups = Constraints.unspentOutputs utxos2 P.<>
Constraints.otherScript validator
tx :: TxConstraints Void Void
tx = mconcat [mustSpendScriptOutput oref $ Redeemer $ PlutusTx.toData () | oref <- orefs] P.<>
mustValidateIn (from now)
void $ submitTxConstraintsWith @Void lookups tx
where
isSuitable :: (VestingDatum -> Bool) -> TxOutTx -> Bool
isSuitable p o = case txOutDatumHash $ txOutTxOut o of
Nothing -> False
Just h -> case Map.lookup h $ txData $ txOutTxTx o of
Nothing -> False
Just (Datum e) -> maybe False p $ PlutusTx.fromData e
endpoints :: Contract () VestingSchema Text ()
endpoints = (give' `select` grab') >> endpoints
where
give' = endpoint @"give" >>= give
grab' = endpoint @"grab" >> grab
mkSchemaDefinitions ''VestingSchema
mkKnownCurrencies []

View file

@ -0,0 +1,127 @@
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveAnyClass #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE NoImplicitPrelude #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE TypeApplications #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE TypeOperators #-}
{-# OPTIONS_GHC -fno-warn-unused-imports #-}
module Week03.Solution2 where
import Control.Monad hiding (fmap)
import Data.Aeson (ToJSON, FromJSON)
import Data.Map as Map
import Data.Text (Text)
import Data.Void (Void)
import GHC.Generics (Generic)
import Plutus.Contract
import qualified PlutusTx
import PlutusTx.Prelude hiding (Semigroup(..), unless)
import Ledger hiding (singleton)
import Ledger.Constraints as Constraints
import qualified Ledger.Typed.Scripts as Scripts
import Ledger.Ada as Ada
import Playground.Contract (printJson, printSchemas, ensureKnownCurrencies, stage, ToSchema)
import Playground.TH (mkKnownCurrencies, mkSchemaDefinitions)
import Playground.Types (KnownCurrency (..))
import Prelude (IO, Semigroup (..), Show (..), String)
import Text.Printf (printf)
{-# INLINABLE mkValidator #-}
mkValidator :: PubKeyHash -> POSIXTime -> () -> ScriptContext -> Bool
mkValidator pkh s () ctx =
traceIfFalse "beneficiary's signature missing" checkSig &&
traceIfFalse "deadline not reached" checkDeadline
where
info :: TxInfo
info = scriptContextTxInfo ctx
checkSig :: Bool
checkSig = pkh `elem` txInfoSignatories info
checkDeadline :: Bool
checkDeadline = from s `contains` txInfoValidRange info
data Vesting
instance Scripts.ValidatorTypes Vesting where
type instance DatumType Vesting = POSIXTime
type instance RedeemerType Vesting = ()
typedValidator :: PubKeyHash -> Scripts.TypedValidator Vesting
typedValidator p = Scripts.mkTypedValidator @Vesting
($$(PlutusTx.compile [|| mkValidator ||]) `PlutusTx.applyCode` PlutusTx.liftCode p)
$$(PlutusTx.compile [|| wrap ||])
where
wrap = Scripts.wrapValidator @POSIXTime @()
validator :: PubKeyHash -> Validator
validator = Scripts.validatorScript . typedValidator
scrAddress :: PubKeyHash -> Ledger.Address
scrAddress = scriptAddress . validator
data GiveParams = GiveParams
{ gpBeneficiary :: !PubKeyHash
, gpDeadline :: !POSIXTime
, gpAmount :: !Integer
} deriving (Generic, ToJSON, FromJSON, ToSchema)
type VestingSchema =
Endpoint "give" GiveParams
.\/ Endpoint "grab" ()
give :: AsContractError e => GiveParams -> Contract w s e ()
give gp = do
let p = gpBeneficiary gp
d = gpDeadline gp
tx = mustPayToTheScript d $ Ada.lovelaceValueOf $ gpAmount gp
ledgerTx <- submitTxConstraints (typedValidator p) tx
void $ awaitTxConfirmed $ txId ledgerTx
logInfo @String $ printf "made a gift of %d lovelace to %s with deadline %s"
(gpAmount gp)
(show $ gpBeneficiary gp)
(show $ gpDeadline gp)
grab :: forall w s e. AsContractError e => Contract w s e ()
grab = do
now <- currentTime
pkh <- pubKeyHash <$> ownPubKey
utxos <- Map.filter (isSuitable now) <$> utxoAt (scrAddress pkh)
if Map.null utxos
then logInfo @String $ "no gifts available"
else do
let orefs = fst <$> Map.toList utxos
lookups = Constraints.unspentOutputs utxos <>
Constraints.otherScript (validator pkh)
tx :: TxConstraints Void Void
tx = mconcat [mustSpendScriptOutput oref $ Redeemer $ PlutusTx.toData () | oref <- orefs] <>
mustValidateIn (from now)
ledgerTx <- submitTxConstraintsWith @Void lookups tx
void $ awaitTxConfirmed $ txId ledgerTx
logInfo @String $ "collected gifts"
where
isSuitable :: POSIXTime -> TxOutTx -> Bool
isSuitable now o = case txOutDatumHash $ txOutTxOut o of
Nothing -> False
Just h -> case Map.lookup h $ txData $ txOutTxTx o of
Nothing -> False
Just (Datum e) -> case PlutusTx.fromData e of
Nothing -> False
Just d -> d <= now
endpoints :: Contract () VestingSchema Text ()
endpoints = (give' `select` grab') >> endpoints
where
give' = endpoint @"give" >>= give
grab' = endpoint @"grab" >> grab
mkSchemaDefinitions ''VestingSchema
mkKnownCurrencies []

View file

@ -0,0 +1,138 @@
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveAnyClass #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE NoImplicitPrelude #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE TypeApplications #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE TypeOperators #-}
{-# OPTIONS_GHC -fno-warn-unused-imports #-}
module Week03.Vesting where
import Control.Monad hiding (fmap)
import Data.Aeson (ToJSON, FromJSON)
import Data.Map as Map
import Data.Text (Text)
import Data.Void (Void)
import GHC.Generics (Generic)
import Plutus.Contract
import PlutusTx (Data (..))
import qualified PlutusTx
import PlutusTx.Prelude hiding (Semigroup(..), unless)
import Ledger hiding (singleton)
import Ledger.Constraints as Constraints
import qualified Ledger.Typed.Scripts as Scripts
import Ledger.Ada as Ada
import Playground.Contract (printJson, printSchemas, ensureKnownCurrencies, stage, ToSchema)
import Playground.TH (mkKnownCurrencies, mkSchemaDefinitions)
import Playground.Types (KnownCurrency (..))
import Prelude (IO, Semigroup (..), Show (..), String)
import Text.Printf (printf)
data VestingDatum = VestingDatum
{ beneficiary :: PubKeyHash
, deadline :: POSIXTime
} deriving Show
PlutusTx.unstableMakeIsData ''VestingDatum
{-# INLINABLE mkValidator #-}
mkValidator :: VestingDatum -> () -> ScriptContext -> Bool
mkValidator dat () ctx = traceIfFalse "beneficiary's signature missing" signedByBeneficiary &&
traceIfFalse "deadline not reached" deadlineReached
where
info :: TxInfo
info = scriptContextTxInfo ctx
signedByBeneficiary :: Bool
signedByBeneficiary = txSignedBy info $ beneficiary dat
deadlineReached :: Bool
deadlineReached = contains (from $ deadline dat) $ txInfoValidRange info
data Vesting
instance Scripts.ValidatorTypes Vesting where
type instance DatumType Vesting = VestingDatum
type instance RedeemerType Vesting = ()
typedValidator :: Scripts.TypedValidator Vesting
typedValidator = Scripts.mkTypedValidator @Vesting
$$(PlutusTx.compile [|| mkValidator ||])
$$(PlutusTx.compile [|| wrap ||])
where
wrap = Scripts.wrapValidator @VestingDatum @()
validator :: Validator
validator = Scripts.validatorScript typedValidator
valHash :: Ledger.ValidatorHash
valHash = Scripts.validatorHash typedValidator
scrAddress :: Ledger.Address
scrAddress = scriptAddress validator
data GiveParams = GiveParams
{ gpBeneficiary :: !PubKeyHash
, gpDeadline :: !POSIXTime
, gpAmount :: !Integer
} deriving (Generic, ToJSON, FromJSON, ToSchema)
type VestingSchema =
Endpoint "give" GiveParams
.\/ Endpoint "grab" ()
give :: AsContractError e => GiveParams -> Contract w s e ()
give gp = do
let dat = VestingDatum
{ beneficiary = gpBeneficiary gp
, deadline = gpDeadline gp
}
tx = mustPayToTheScript dat $ Ada.lovelaceValueOf $ gpAmount gp
ledgerTx <- submitTxConstraints typedValidator tx
void $ awaitTxConfirmed $ txId ledgerTx
logInfo @String $ printf "made a gift of %d lovelace to %s with deadline %s"
(gpAmount gp)
(show $ gpBeneficiary gp)
(show $ gpDeadline gp)
grab :: forall w s e. AsContractError e => Contract w s e ()
grab = do
now <- currentTime
pkh <- pubKeyHash <$> ownPubKey
utxos <- Map.filter (isSuitable pkh now) <$> utxoAt scrAddress
if Map.null utxos
then logInfo @String $ "no gifts available"
else do
let orefs = fst <$> Map.toList utxos
lookups = Constraints.unspentOutputs utxos <>
Constraints.otherScript validator
tx :: TxConstraints Void Void
tx = mconcat [mustSpendScriptOutput oref $ Redeemer $ PlutusTx.toData () | oref <- orefs] <>
mustValidateIn (from now)
ledgerTx <- submitTxConstraintsWith @Void lookups tx
void $ awaitTxConfirmed $ txId ledgerTx
logInfo @String $ "collected gifts"
where
isSuitable :: PubKeyHash -> POSIXTime -> TxOutTx -> Bool
isSuitable pkh now o = case txOutDatumHash $ txOutTxOut o of
Nothing -> False
Just h -> case Map.lookup h $ txData $ txOutTxTx o of
Nothing -> False
Just (Datum e) -> case PlutusTx.fromData e of
Nothing -> False
Just d -> beneficiary d == pkh && deadline d <= now
endpoints :: Contract () VestingSchema Text ()
endpoints = (give' `select` grab') >> endpoints
where
give' = endpoint @"give" >>= give
grab' = endpoint @"grab" >> grab
mkSchemaDefinitions ''VestingSchema
mkKnownCurrencies []