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  • WELCOME TO ALEPH ZERO
  • EXPLORE
    • About Aleph Zero
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    • Aleph Zero Signer
      • General introduction
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      • How to forget and restore accounts?
      • What are Networks?
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    • Dashboard
      • Dashboard basics
      • Overview
    • Stake
      • Staking Basics
      • Staking Menu Overview
      • How to Start Staking with the Aleph Zero Dashboard
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    • Validate
      • Validating Overview
      • Hardware requirements
      • Running an Aleph Node on Testnet
        • Downloading and running the node
        • Verifying your setup
        • Customizing your setup
        • Building and running from source [advanced]
          • Building from source
          • Set environment variables
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        • Appendix: Ports, addresses, validators, and archivists
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        • Running the node
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  • BUILD
    • Aleph Zero smart contracts basics
      • Setting up a Testnet account
      • Installing required tools
      • Creating your first contract
      • Deploying your contract to Aleph Zero Testnet
      • Extending your contract
    • Cross contract calls
      • Using references
      • Using dynamic calls
    • Migrating from Solidity
    • Writing e2e tests with ink-wrapper
    • Aleph Zero Signer integration
    • Front-end app: smart contract interaction
    • Security Course by Kudelski Security
      • ink! Developers Security Guideline
      • Lesson 1 - Getting started with ink!
      • Lesson 2 - Threat Assessment
      • Lesson 3 - Integer Overflow
      • Lesson 4 - Signed-integer
      • Lesson 5 - Role-Based Access Control
      • Lesson 6 - Address Validation
      • Lesson 7 - Smart Contract Control
    • Development on EVM-layer
  • PROTOCOL DETAILS
    • Shielder
      • Overview
      • Design against Bad Actors
      • Preliminaries - ZK-relations
      • Notes and Accounts
      • ZK-ID and Registrars
      • Anonymity Revokers
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      • Version 0.2.0
    • Common DEX
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      • Dutch Auctions
  • FAQ
  • Tutorials
    • Withdrawing coins from exchanges
      • How to withdraw your AZERO coins from KuCoin
      • How to withdraw your AZERO coins from MEXC Global
      • How to withdraw your AZERO coins from HTX
  • Setting up or restoring a wallet
    • How to set up or recover your AZERO account using Aleph Zero Signer
    • How to set up or recover your AZERO account using the official mainnet web wallet
    • How to set up or recover your AZERO account using Nova Wallet
    • How to set up or recover your AZERO account using SubWallet
    • How to set up or recover your AZERO account using Talisman
  • Staking
    • How to stake via a direct nomination using the Aleph Zero Dashboard
    • How to stake via a nomination pool using the Aleph Zero Dashboard
    • How to destroy a nomination pool via the Aleph Zero Dashboard
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  1. BUILD
  2. Aleph Zero smart contracts basics

Extending your contract

Here you will find a collection of "how to" on various topics related to writing smart contracts in ink!

PreviousDeploying your contract to Aleph Zero TestnetNextCross contract calls

Last updated 2 years ago

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We've prepared a sample smart contract that tries to cover all of the basic-to-medium topics and constructs that you might need when working on your own idea - see

Use the README.md of the contract as the starting point. Happy hacking!

Bulletin Board example contract.