Algorand Developer Portal

Building a decentralized vault using stateful smart contracts

Vaults are a security mechanism to prevent cryptocurrency from being immediately withdrawn by forcing its creator to wait a certain wait time after a request has been made, while also giving them the ability to cancel a request that they have not made.

Roberto Pettinau Università degli studi di Cagliari

ASA payment for a smart contract service using Algorand

This article presents a solution for how to use ASA payment for a smart contract service using Algorand. We will implement this using [Algo Builder](https://algobuilder.dev).

Amit Yadav Algo Builder

Oracle for Algorand Using Smart Contracts

This solution shows how to combine Pyteal smart contract and a Java application to implement an Oracle, to provide real world data to Algorand smart contracts.

Dame Seiel

Intermediate · 30 minutes

Build Algorand Android Smart Contract using Kotlin

This tutorial is targeted at beginners and intermediate Algorand developers who primarily develop Android Applications using Kotlin. The tutorial will also be beneficial to Java Android Developers as both languages have a lot in common.

Glory Agatevure Africinnovate

Intermediate · 30 minutes

Algo Builder Tutorial Part 2: Stateless Smart Contracts

Building Smart Contracts with Algo Builder. Our goal is to make shipping Algorand applications simple, efficient, and scalable.

Robert Zaremba Algorand Builder

Intermediate · 30 minutes

Using the TEAL Debugger to Debug a Smart Contract

This tutorial will provide a step-by-step guide on how to use the TEAL debugger to debug a buggy Algorand smart contract.

Damian Barabonkov

Intermediate · 30 minutes

Algo Builder Tutorial Part 4: Testing Smart Contracts

In this tutorial we present how `algob` helps the developers to test their smart contracts effectively.

Robert Zaremba Algorand Builder

Beginner · 1 hour

Create and test smart contracts using Python

Create two smart contracts using Python Algorand SDK and PyTeal, then test their implementation using pytest.

Ivica Paleka

Intermediate · 30 minutes

Algorand Studio | Tutorial 3: Smart Contract Limit Order

Introduce the Algorand Standard Asset (ASA) model and work through the LimitOrder smart contract to learn issuing your own ASA & using the smart contract to exchange ALGO for an ASA.

Phil Li Obsidian Labs

Intermediate · 30 minutes

Algo Builder Tutorial Part 3: Stateful Smart Contracts

This is the third tutorial from the Algo Builder series. In this tutorial we present how `algob` helps the developers to wield the power of Stateful Smart Contracts with TEAL.

Amit Yadav Algo Builder

Beginner · 1 hour

Writing a Simple Smart Contract

Example showing how to build a simple smart contract.

Jason Weathersby Algorand

Intermediate · 30 minutes

Algorand Studio | Tutorial 2: Smart Contract Dynamic Fee

Use Algorand Studio for ASC development including creating a project, coding, compiling, and constructing transactions to execute the smart contract.

Phil Li Obsidian Labs

PyTeal — Writing Algorand Smart Contracts in Python

PyTeal is a python language binding for Algorand Smart Contracts (ASC) that abstracts away the complexities in writing smart contracts. PyTeal is provided as an open-source tool for the Algorand community. We invite you to try, use, and contribute to PyTeal if you are interested in developing and deploying ASC’s in Python.

Shumo Chu Algorand

How to Write Smart Contracts

This article summarizes the three primary ways you can build Algorand Smart Contracts.

Jason Weathersby Algorand

Verify Signatures and Signed Data within Algorand Smart Contracts

This article explains how to use the ed25519verify opcode in conjunction with the tealsign goal command.

Jason Weathersby Algorand

Smart Contract SDK Usage Updated to V2

The feature guide for accessing a TEAL program from an SDK is updated for V2. This guide contains SDK samples using TEAL programs with contract accounts or delegated signatures.

Russell Fustino Algorand

Leased Transactions: Securing Advanced Smart Contract Design

Certain smart contracts can benefit from defining a Lease parameter, which can provide security for exclusive transaction execution, mitigate fee variability, and enable long-running smart contracts. Learn when and how to use Leases in this article.