# An end-to-end ecosystem demo **URL:** \ **Category:** Share your projects\ **Created:** [October 28, 2026, 11:45pm UTC](https://community.simplicity-lang.org/t/an-end-to-end-ecosystem-demo/100 "2026-10-28T23:45:36Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![schoen](https://avatars.discourse-cdn.com/v4/letter/s/b3f665/32.png) [@schoen](https://community.simplicity-lang.org/u/schoen)\ **Post date:** [October 28, 2026, 11:45pm UTC](https://community.simplicity-lang.org/t/an-end-to-end-ecosystem-demo/100/1 "2026-10-28T23:45:36Z")
I’m happy to share a new tutorial that I’ve been working on for some time. This is a step-by-step recipe (with some sample artifacts) to show off various parts of our ecosystem, letting you build and deploy a working web app from the allowance contract `allowance.simf`, and interact with it using a real Liquid wallet. (You may have seen this contract on our developer docs landing page. It’s a covenant example that lets a benefactor create an allowance that a beneficiary can draw upon, but only a certain amount of money per time period.) > **[Build a complete application from web to wallet - Simplicity](https://docs.simplicity-lang.org/getting-started/build-end-to-end-app/)** > > A typed, combinator-based, smart contract language for Bitcoin-like blockchains. As of late October 2026, the main rough edges I know of are: (1) you have to apply a few source patches, (2) you have to compile the Humid Wallet from source code yourself, (3) the versions of `txmanifest.json` used in different steps reflect different versions of the txmanifest specification. In general, this tutorial should be able to take you through the whole process and end up with a working web app of your own, doing Liquid testnet transactions from a real wallet and checking the status of contract deployments with a linked web app, in addition to writing Simplex integration tests. I’d be glad to hear about your experiences trying it out!