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Article

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.

Tutorial

Intermediate · 30 minutes

How to use Multisignature Transactions in Java

This tutorial covers how to sign and send transactions from a multisignature account using the Algorand Java SDK

logicsignature

transactions

signatures

java

multisignature

Tutorial

Intermediate · 30 minutes

Hash Time Lock Contract Template With JavaScript

Build a Smart Contract that functions as a HTLC using JavaScript

htlc

teal

logic signature

logicsig

v1 api

Tutorial

Intermediate · 30 minutes

Hash Time Lock Contract Template With Go

Build a Smart Contract that functions as a HTLC using Go

htlc

teal

logic signature

logicsig

v1 api

Tutorial

Intermediate · 30 minutes

Hash Time Lock Contract Template With Java

Build a Smart Contract that functions as a HTLC using Java

htlc

teal

logic signature

logicsig

v1 api

Tutorial

Intermediate · 30 minutes

Hash Time Lock Contract Template With Python

Build a Smart Contract that functions as a HTLC using Python

htlc

teal

logic signature

logicsig

v1 api

Solution

Creating a Point-of-Sale Application with the Algorand Blockchain

We show how to use Algorand’s blockchain to create an alternative payment solution for processing retail transactions. The solution demonstrates a point-of-sale application and a signing wallet.

transactions

java

point of sale

transaction gateway

Solution

Build Algorand iOS, Android and UWP apps using C# .NET SDK and Xamarin

This solution shows how to build an Algorand application for iOS, Android and Universal Windows Platform (UWP), with one code base, using Xamarin Forms and C#.

transactions

asa

atomic transfer

c#

csharp

asc1

uwp

.net

iOS

Xamarin

Android

Solution

AlgoNim

AlgoNim is the first Algorand game incorporating all the features introduced in Algorand 2.0: Algorand Standard Assets (ASA), Atomic Transfers (AT) and Algorand Smart Contracts (ASC1).

python

asa

atomic transfer

smart contracts

pyteal

teal

asc1

game

Solution

Example Digital Exchange Smart Contract Application

This solution presents a very simple DEX application using stateless and stateful smart contracts. It allows users to place limit orders that are fulfilled at a later time by another party.

smart contracts

teal

SDK

Tutorial

Intermediate · 15 minutes or less

Adding Transaction Capabilities to a dApp Using AlgoSigner

AlgoSigner is a blockchain wallet that makes it easy to use Algorand-based applications on the web. In this tutorial, you will learn how to integrate AlgoSigner into your decentralized application.

transactions

PureStake

AlgoSigner

Tutorial

Beginner · 1 hour

Writing a Simple Smart Contract

Example showing how to build a simple smart contract.

Debug

smart contracts

teal

Tutorial

Intermediate · 1 hour

Hybrid Online / Offline Shared Management of Community ASA through Multisig Account

In this tutorial you will learn how to share the management of a “Community Membership ASA” among the Community Board members with a Multisignature Account using a hybrid Online / Offline approach

governance

assets

asa

offline authorization

multisignature

multisig

Article

Updated PyTeal Resources

PyTeal, a language binding for TEAL, is a community project created to make writing Algorand Smart Contracts (ASC) easier. This article summarizes the latest resources available to start building Algorand Smart Contracts in Python.

Article

Introducing Algorand’s V2 Indexer

Introducing the new Algorand Indexer - a fast and efficient way to search for transactions, accounts, assets, and blocks on the Algorand blockchain.

Article

What's New: Algorand v2.0.7

Algorand v2.0.7 was released to MainNet and TestNet, accompanied by a new set of features in the Algorand APIs. Learn more about what's new in this article.

Article

Algorand Smart Contract Layer1 (ASC1) and Oracles

At the end of 2019, Algorand released in record time the Algorand Smart Contract Layer1 (ASC1), a new paradigm shift for smart contracts. The first part of this article goes through our understanding of ASC1. The second part addresses oracle data in ASC1 showing a way to insert signed data from the outside world with a small example.

Article

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.

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