---
title: "Radix Developer Environment (Alexandria)"
path: "/contents/tech/releases/radix-developer-environment-alexandria"
bannerImage: "https://j9ytchrzkvqpcul7.public.blob.vercel-storage.com/225181b6-8b3e-4951-b366-090d92544dd7.jpg"
version: "1.2.0"
author: "Hydrate"
createdAt: "2026-02-03T18:02:56.979Z"
updatedAt: "2026-03-16T18:25:45.671Z"
---

# Radix Developer Environment (Alexandria)

**[Alexandria](https://www.radixdlt.com/blog/radix-developer-environment-alexandria)** [ /ˌæləgˈzændriə/ ] was a pre-[Babylon](https://www.radixdlt.com/blog/radix-babylon-launch) version of the [Radix network](https://www.radixdlt.com) and appended the [Olympia](/contents/tech/releases/radix-mainnet-olympia) release with a [Scrypto](/contents/tech/core-protocols/scrypto-programming-language) developer environment for testing applications on a local network simulator.

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## Features

[Alexandria](https://www.radixdlt.com/blog/radix-developer-environment-alexandria) brought the release of an early form of [Scrypto](/developers/legacy-docs/updates/roadmap/scrypto/scrypto) and associated tools on the [Scrypto](/developers/legacy-docs/updates/roadmap/scrypto/scrypto) Github repo, all of which are open source. Scrypto is a set of libraries and extensions to the popular Rust programming language that provides the [asset-oriented](/developers/legacy-docs/essentials/asset-oriented) features that define the Scrypto experience of writing smart contracts. To test Scrypto [blueprints and components](/developers/legacy-docs/build/scrypto-1/blueprints-and-components) meaningfully, the developer needs some way of deploying that code and interacting with it. [Alexandria](https://www.radixdlt.com/blog/alexandria-scrypto-is-here) provides a simulator of such an environment that developers can use to quickly build, test, and iterate Scrypto code, all on their local computer.

## Scrypto Development

To help developers get started with Scrypto, Radix has launched a new Radix Developers Site, which provides links to installation instructions, documentation, examples, and more. Radix has also published a series of blog articles describing the need for Scrypto and how it is different from today's smart contract paradigm, as well as a new [DeFi](https://en.wikipedia.org/wiki/Decentralized_finance) White Paper that collects much of the same information in one place.

<Infobox>
|  | **
DEVELOPMENT** |
| **Launch Date** | [2021-12-15](https://www.radixdlt.com/blog/alexandria-scrypto-is-here) |
| **Antecedent** | [Olympia](/contents/tech/releases/radix-mainnet-olympia) |
| **Postcedent** | [Babylon](/contents/tech/releases/radix-mainnet-babylon) |
| **License** | [Radix License, v1](http://radixfoundation.org/licenses/license-v1) |
|  | **LEDGER** |
| **State Model** | [Sharded](/contents/tech/core-concepts/sharding) |
| **Shard Groups** | [1](/contents/tech/core-concepts/shard-groups) |
| **Sybil Protection** | [Delegated Proof of Stake](/contents/tech/core-concepts/delegated-proof-of-stake-dpos) |
| **Consensus Protocol** | [Cerberus](/contents/tech/core-protocols/cerberus-consensus-protocol) |
| **Execution Environment** | [Radix Engine](/contents/tech/core-protocols/radix-engine) v2 |
| **Validator Node Cap** | 100 |
</Infobox>