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https://github.com/aiken-lang/stdlib

The Aiken Standard Library
https://github.com/aiken-lang/stdlib

aiken cardano plutus smart-contract

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The Aiken Standard Library

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Aiken Aiken Standard Library

[![Licence](https://img.shields.io/github/license/aiken-lang/stdlib)](https://github.com/aiken-lang/stdlib/blob/main/LICENSE)
[![Continuous Integration](https://github.com/aiken-lang/stdlib/actions/workflows/continuous-integration.yml/badge.svg?branch=main)](https://github.com/aiken-lang/stdlib/actions/workflows/continuous-integration.yml)



The official standard library for the [Aiken](https://aiken-lang.org) Cardano
smart-contract language.

It extends the language builtins with useful data-types, functions, constants
and aliases that make using Aiken a bliss.

```aiken
use aiken/hash.{Blake2b_224, Hash}
use aiken/list
use aiken/transaction.{ScriptContext}
use aiken/transaction/credential.{VerificationKey}

pub type Datum {
owner: Hash,
}

pub type Redeemer {
msg: ByteArray,
}

/// A simple validator which replicates a basic public/private signature lock.
///
/// - The key (hash) is set as datum when the funds are sent to the script address.
/// - The spender is expected to provide a signature, and the string 'Hello, World!' as message
/// - The signature is implicitly verified by the ledger, and included as 'extra_signatories'
///
validator {
fn spend(datum: Datum, redeemer: Redeemer, context: ScriptContext) -> Bool {
let must_say_hello =
redeemer.msg == "Hello, World!"

let must_be_signed =
context.transaction.extra_signatories
|> list.any(fn(vkh: ByteArray) { vkh == datum.owner })

must_say_hello && must_be_signed
}
}
```

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