title: Create your minimum dapp on Tezos authors: "Benjamin Fuentes" last_update: date: 27 November 2023

dapp : A decentralized application is a type of distributed open source software application that runs on a peer-to-peer (P2P) blockchain network rather than on a single computer. DApps are visibly similar to other software applications that are supported on a website or mobile device.

This tutorial shows you how to create a poke game on smart contract. The game consists on poking the owner of a smart contract. The smart contract keeps a track of user interactions and stores a trace.

Poke sequence diagram

  Note left of User: Prepare poke transaction
  User->>Smartcontract: poke()
  Note right of Smartcontract: store(pokeTrace)

You will learn :


This tutorial uses Typescript, so it will be easier if you are familiar with JavaScript.

  1. Make sure that you have installed these tools:

    • Node.JS and NPM: NPM is required to install the web application's dependencies
    • Taqueria, version 0.45.0 or later: Taqueria is a platform that makes it easier to develop and test dApps
    • Docker: Docker is required to run Taqueria
    • jq: Some commands use the jq program to extract JSON data
    • yarn: The frontend application uses yarn to build and run (see this article for details about differences between npm and yarn)
    • Any Tezos-compatible wallet that supports Ghostnet, such as Temple wallet
  2. Optionally, you can install VS Code to edit your application code in and the LIGO VS Code extension for LIGO editing features such as code highlighting and completion. Taqueria also provides a Taqueria VS Code extension that helps visualize your project and run tasks.

The tutorial application

In this tutorial, you create a simple game where the user is poking though a dapp. The user interacts with the smart contract through a web interface, where they can see the current state of the contract and send poke commands to it. The contract responds by updating its storage with the user's address. Alternately, a user can also poke the contract deployed by other users.

The application looks like this:


The code for the completed application is in this GitHub repository: solution

title: Part 1 : Create your minimum dapp on Tezos authors: "Benjamin Fuentes" last_update: date: 27 November 2023

To start working with the application, you create a Taqueria project and use it to deploy the Poke contract. Then you set up a web application to connect with a wallet, and then interact with your smart contract.

Before you begin, make sure that you have installed the tools in the Prerequisites section.

Creating a Taqueria project

Taqueria manages the project structure and keeps it up to date. For example, when you deploy a new smart contract, Taqueria automatically updates the web app to send transactions to that new smart contract. Follow these steps to set up a Taqueria project:

On the command-line terminal, run these commands to set up a Taqueria project and install the Ligo and Taquito plugins:

taq init training
cd training
taq install @taqueria/plugin-ligo
taq install @taqueria/plugin-taquito
taq create contract pokeGame.jsligo

Write the Smart contract code

  1. Edit the pokeGame.jsligo file

Remove the default code and paste this code instead

export type storage = unit;

type return_ = [list<operation>, storage];

const poke = (_: unit, store: storage): return_ => {
  return [list([]), store];

Every contract requires to respect this convention :

Have a look on the Entrypoints contracts documentation>

Note : The old syntax was requiring a main function. It is still valid but very verbatim and deprecated in Ligo V1.

A Poke variant parameter is generated from the poke entrypoint function under the hood. A variant is more or less equivalent of the Enum type in Javascript. A default main function is generated and act like as a dispatcher for each of your entrypoints. It means that this painful boilerplate is no more needed on the new syntax

Have a look on the Variant type documentation

  1. Write the poke function

The objective is to store every user/caller addresses poking the contract. Rewrite the storage, and add the caller address to the set of traces

At line 1, replace the line with :

export type storage = set<address>;

Replace the poke function with :

const poke = (_: unit, store: storage): return_ => {
  return [list([]), Set.add(Tezos.get_source(), store)]

Explanation :

Have a look on the Set library documentation

Have a look on the List library documentation

Here, get the caller address using Tezos.get_source(). Tezos library provides useful functions for manipulating blockchain objects

Have a look on the Tezos library documentation

  1. Try to poke

The Ligo command-line provides sub-commands to test your Ligo code

Have a look on the Testing Framework documentation

Compile the contract with Taqueria (Force to use a specific Ligo version with TAQ_LIGO_IMAGE Taqueria environment variable)

TAQ_LIGO_IMAGE=ligolang/ligo:1.1.0 taq compile pokeGame.jsligo

Taqueria is generating the .tz Michelson file on the artifacts folder. The Michelson language is the default stack language used by the Michelson VM to run your code on a node. It is something similar to WASM.

Have a look on the Michelson documentation

Taqueria is generating two additional files, edit the first file pokeGame.storageList.jsligo replacing current code with :

#import "pokeGame.jsligo" "Contract"

const default_storage = Set.empty as set<address>;

When you deploy a contract, you are required to initialize the default state of your smart contract. Taqueria offers you to declare different variables on this file, it is useful to use different initialized state per environment

Have a look on the Taqueria documentation

Compile all (contract + initial storage)

TAQ_LIGO_IMAGE=ligolang/ligo:1.1.0 taq compile pokeGame.jsligo

It compiles both source code and storage

Before deployment, to simulate a call to our entrypoint poke, use taq simulate.
The contract parameter Poke() and the initial storage with the default empty set is passed to the execution

Edit the second file pokeGame.parameterList.jsligo

#import "pokeGame.jsligo" "Contract"
const default_parameter: parameter_of Contract = Poke();

Run the simulation. First, install the Tezos client plugin, recompile all and then run the simulation

taq install @taqueria/plugin-octez-client
TAQ_LIGO_IMAGE=ligolang/ligo:1.1.0 taq compile pokeGame.jsligo
taq simulate pokeGame.tz --param pokeGame.parameter.default_parameter.tz

Output logs :

│ Contract    │ Result                                       │
│ pokeGame.tz │ storage                                      │
│             │   { "tz1Ke2h7sDdakHJQh8WX4Z372du1KChsksyU" } │
│             │ emitted operations                           │
│             │                                              │
│             │ big_map diff                                 │
│             │                                              │
│             │                                              │

You can notice that the instruction is storing the address of the caller into the storage set

  1. Configure your wallet to get free Tez

The default Tezos testing testnet is called Ghostnet

⚠️ You need an account to deploy a contract with some tez (the Tezos native currency). The first time you deploy a contract with Taqueria, it is generating a new implicit account with 0 tez

Deploying your contract to the testing environment, it forces Taqueria to generate a default account

taq deploy pokeGame.tz -e "testing"

You should get this kind of log

Warning: the faucet field in network configs has been deprecated and will be ignored
A keypair with public key hash tz1XXXXXXXXXXXXXXXXXXXXXX was generated for you.
To fund this account:
1. Go to https://teztnets.xyz and click "Faucet" of the target testnet
2. Copy and paste the above key into the 'wallet address field
3. Request some Tez (Note that you might need to wait for a few seconds for the network to register the funds)
No operations performed

Now you have 💰

  1. Deploy to Ghostnet testnet

Redeploy to the testing environment

taq deploy pokeGame.tz -e "testing"

Your smart contract is deployed on the Ghostnet

│ Contract    │ Address                              │ Alias    │ Balance In Mutez │ Destination                    │
│ pokeGame.tz │ KT1G8tx4qSeJmKRY1p2oxA6eYoCGc9Qi3Fky │ pokeGame │ 0                │ https://ghostnet.ecadinfra.com │

Create the frontend

  1. Create a react app
yarn create vite

Then follow the prompts. Choose React and then Typescript+SWC:

? Project name: › app #Enter your project name

? Select a framework: › - Use arrow-keys. Return to submit. # Select React as framework
❯   React

? Select a variant: › - Use arrow-keys. Return to submit. #Both TypeScript variants are fine. Select TypeScript only.
❯   TypeScript + SWC
    JavaScript + SWC

More information about SWC here.

Add taquito and tzkt indexer libraries

cd app
yarn add @taquito/taquito @taquito/beacon-wallet @airgap/beacon-sdk  @tzkt/sdk-api
yarn add -D @airgap/beacon-types

⚠️ Before starting, add the following dependencies in order to resolve polyfill issues. Some dependencies are from NodeJs, thus not included in browsers.

For example, in my case, I installed this :

yarn add --dev process buffer crypto-browserify stream-browserify assert stream-http https-browserify os-browserify url path-browserify

Create a new file nodeSpecific.ts in the src folder of your project and edit with this content :

touch src/nodeSpecific.ts
import { Buffer } from "buffer";

globalThis.Buffer = Buffer;

Open the index.html file and replace the body with this one :

  <div id="root"></div>
  <script type="module" src="/src/nodeSpecific.ts"></script>
  <script type="module" src="/src/main.tsx"></script>

Finally open the vite.config.ts file and replace it with :

import react from "@vitejs/plugin-react-swc";
import path from "path";
import { defineConfig } from "vite";
// https://vitejs.dev/config/
export default ({ command }) => {
  const isBuild = command === "build";

  return defineConfig({
    define: {},
    plugins: [react()],
    build: {
      commonjsOptions: {
        transformMixedEsModules: true,
    resolve: {
      alias: {
        // dedupe @airgap/beacon-sdk
        // I almost have no idea why it needs `cjs` on dev and `esm` on build, but this is how it works 🤷‍♂️
        "@airgap/beacon-sdk": path.resolve(
            isBuild ? "esm" : "cjs"
        stream: "stream-browserify",
        os: "os-browserify/browser",
        util: "util",
        process: "process/browser",
        buffer: "buffer",
        crypto: "crypto-browserify",
        assert: "assert",
        http: "stream-http",
        https: "https-browserify",
        url: "url",
        path: "path-browserify",
  1. Generate the Typescript classes from Michelson code

Taqueria is able to generate Typescript classes for any frontend application. It takes the definition of your smart contract and generates the contract entrypoint functions, type definitions, etc ...

To get typescript classes from taqueria plugin, on your project root folder run :

taq install @taqueria/plugin-contract-types
taq generate types ./app/src

Back to your frontend app, run the dev server

cd app
yarn dev

Open your browser at : http://localhost:5173/ Your app should be running

  1. Connect / disconnect the wallet

Declare two React Button components and display the user address and his balance

Edit src/App.tsx file

import { NetworkType } from "@airgap/beacon-types";
import { BeaconWallet } from "@taquito/beacon-wallet";
import { TezosToolkit } from "@taquito/taquito";
import * as api from "@tzkt/sdk-api";
import { useEffect, useState } from "react";
import "./App.css";
import ConnectButton from "./ConnectWallet";
import DisconnectButton from "./DisconnectWallet";

function App() {
  api.defaults.baseUrl = "https://api.ghostnet.tzkt.io";

  const Tezos = new TezosToolkit("https://ghostnet.tezos.marigold.dev");
  const wallet = new BeaconWallet({
    name: "Training",
    preferredNetwork: NetworkType.GHOSTNET,

  useEffect(() => {
    (async () => {
      const activeAccount = await wallet.client.getActiveAccount();
      if (activeAccount) {
        const balance = await Tezos.tz.getBalance(activeAccount.address);
  }, []);

  const [userAddress, setUserAddress] = useState<string>("");
  const [userBalance, setUserBalance] = useState<number>(0);

  return (
    <div className="App">
      <header className="App-header">


          I am {userAddress} with {userBalance} mutez

export default App;

Let's create the 2 missing src component files :

touch src/ConnectWallet.tsx
touch src/DisconnectWallet.tsx

ConnectWallet button creates an instance wallet, gets user permissions via a popup and then retrieves the current account information

Edit ConnectWallet.tsx

import { NetworkType } from "@airgap/beacon-sdk";
import { BeaconWallet } from "@taquito/beacon-wallet";
import { TezosToolkit } from "@taquito/taquito";
import { Dispatch, SetStateAction } from "react";

type ButtonProps = {
  Tezos: TezosToolkit;
  setUserAddress: Dispatch<SetStateAction<string>>;
  setUserBalance: Dispatch<SetStateAction<number>>;
  wallet: BeaconWallet;

const ConnectButton = ({
}: ButtonProps): JSX.Element => {
  const connectWallet = async (): Promise<void> => {
    try {
      await wallet.requestPermissions({
        network: {
          type: NetworkType.GHOSTNET,
          rpcUrl: "https://ghostnet.tezos.marigold.dev",
      // gets user's address
      const userAddress = await wallet.getPKH();
      const balance = await Tezos.tz.getBalance(userAddress);
    } catch (error) {

  return (
    <div className="buttons">
      <button className="button" onClick={connectWallet}>
          <i className="fas fa-wallet"></i>&nbsp; Connect with wallet

export default ConnectButton;

Edit DisconnectWallet.tsx. The button cleans the wallet instance and all linked objects

import { BeaconWallet } from "@taquito/beacon-wallet";
import { Dispatch, SetStateAction } from "react";

interface ButtonProps {
  wallet: BeaconWallet;
  setUserAddress: Dispatch<SetStateAction<string>>;
  setUserBalance: Dispatch<SetStateAction<number>>;

const DisconnectButton = ({
}: ButtonProps): JSX.Element => {
  const disconnectWallet = async (): Promise<void> => {
    console.log("disconnecting wallet");
    await wallet.clearActiveAccount();

  return (
    <div className="buttons">
      <button className="button" onClick={disconnectWallet}>
        <i className="fas fa-times"></i>&nbsp; Disconnect wallet

export default DisconnectButton;

Save both file, the dev server should refresh the page

As Temple is configured, click on Connect button

On the popup, select your Temple wallet, then your account and connect.

Your are logged

Click on the Disconnect button to test the disconnection

  1. List other poke contracts via an indexer

Instead of querying heavily the rpc node to search where are located all other similar contracts and retrieve each address, use an indexer. an indexer is a kind of enriched cache API on top of an rpc node. On this example, the TZKT indexer is used to find other similar contracts.

You need to install jq to parse the Taqueria json configuration file Install jq

On package.json, change the dev command on scripts configuration. Prefix it with a jq command to create an new environment variable pointing to your last smart contract address on testing env :

    "dev": "jq -r '\"VITE_CONTRACT_ADDRESS=\" + last(.tasks[]).output[0].address' ../.taq/testing-state.json > .env && vite",

The last deployed contract address on Ghostnet is set now on our frontend.

Add a button to fetch all similar contracts like yours, then display the list. Edit App.tsx and before the return of App function, add this section for the fetch function

const [contracts, setContracts] = useState<Array<api.Contract>>([]);

const fetchContracts = () => {
  (async () => {
      await api.contractsGetSimilar(import.meta.env.VITE_CONTRACT_ADDRESS, {
        includeStorage: true,
        sort: { desc: "id" },

On the returned html template section, after the display of the user balance div I am {userAddress} with {userBalance} mutez, append this :

<br />
  <button onClick={fetchContracts}>Fetch contracts</button>
  {contracts.map((contract) =>

Save your file and restart your server. Now, the start script generates the .env file containing the last deployed contract address

yarn dev

Go to your web browser and click on Fetch contracts button

Congratulations, you are able to list all similar deployed contracts

  1. Poke your contract

Import the Taqueria generated types

import { PokeGameWalletType } from "./pokeGame.types";

Add this new function after the previous fetch function, it calls the entrypoint for poking

const poke = async (contract: api.Contract) => {
  let c: PokeGameWalletType = await Tezos.wallet.at<PokeGameWalletType>(
    "" + contract.address
  try {
    const op = await c.methods.default().send();
    await op.confirmation();
    alert("Tx done");
  } catch (error: any) {
    console.table(`Error: ${JSON.stringify(error, null, 2)}`);

⚠️ Normally, a call to c.methods.poke() function is expected by convention, but with an unique entrypoint, Michelson generates a unique default entrypoint name instead of having the name of the entrypoint function. Also, be careful because all entrypoints function names are in lowercase, and all parameter types are inuppercase.

Replace the line displaying the contract address {contracts.map((contract) => <div>{contract.address}</div>)} with the one below, it adds a Poke button

    {contracts.map((contract) => <div>{contract.address} <button onClick={() =>poke(contract)}>Poke</button></div>)}

Save and see the page refreshed, then click on the Poke button

It calls the contract and add your public address tz1... to the set of traces


Now, you are able to create any Smart Contract using Ligo and create a complete Dapp via Taqueria/Taquito.

In the next section, you will learn how to call a Smart contract from a Smart Contract using callbacks, and also write unit and mutation tests

When you are ready, continue to Part 2: Inter-contract calls and testing.