README.md

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Aiken Standard Library

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Getting started

aiken add aiken-lang/stdlib --version v2

Compatibility

aiken's version	stdlib's version(s)
v1.1.3 v1.1.4	>= 2.1.0
v1.1.1 v1.1.2	>= 2.0.0 && < 2.1.0
v1.0.29-alpha v1.0.28-alpha	>= 1.9.0 && < 2.0.0
v1.0.26-alpha	<= 1.8.0 && < 1.9.0

Overview

The official standard library for the Aiken Cardano smart-contract language.

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

use aiken/collection/list
use aiken/crypto.{VerificationKeyHash}
use cardano/transaction.{OutputReference, Transaction}

pub type Datum {
  owner: VerificationKeyHash,
}

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 hello_world {
  spend(datum: Option<Datum>, redeemer: Redeemer, _, self: Transaction) {
    expect Some(Datum { owner }) = datum

    let must_say_hello = redeemer.msg == "Hello, World!"

    let must_be_signed = list.has(self.extra_signatories, owner)

    and {
      must_say_hello,
      must_be_signed,
    }
  }
}

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