gamechanger.wallet

GameChanger Wallet v2 Documentation

The Cardano Meta Wallet

GameChanger is a very powerful, customizable, yet friendly, non custodial web light wallet.

Since 2021 unleashes Cardano and eUTXO potential while democratizing users, developers and students access.

The smart design principles of the wallet allows you to import or connect these wallet types:

• seed phrase
• burner wallets
• QR encrypted (personal and gift wallets)
• Ledger and Trezor hardware wallets
• Nami, Eternl, Flint, Vespr, any CIP-30 or browser extension wallet
• Shared Treasuries (script addresses)

And dapps, devices, users and other agents can use links and QR codes to seamlessly communicate with the wallet using intents.

One wallet to have them all, on Desktop and Mobile, with the same intent-based dapp connector.

Link

🚀 Official link to access: GameChanger Wallet v2

These networks are supported:

• Cardano Mainnet
• Cardano Pre-Production Testnet

See bottom of the page for information about the now concluded Beta phase

Documentation

• Transactions / Quick Start: A simple payment dapp
• ⭐ 90+ basic example dapps
• General Documentation: Universal Dapp Connector, GCScript DSL, ISL, Transactions, Workspaces and more. HTML version here
• Language Reference (API docs): GCScript and ISL reference documentation

Ecosystem:

Dapps:

• ARP Radio: Discover the plethora of music in the Cardano ecosystem, then purchase, play, trade, and more! Created by SudoScientist
• Moments: Moments is a decentralized social media platform where creators capture their ideas, share freely, and lock in ownership by minting posts on Cardano. Created by our friend and cherished community member Max Van Rossem.
• M2Tec Payments: POS payment request generator dapp leveraging on an GCFS on-chain open protocol ( Code on Github )
• Neon Soup: Peer-to-peer execution layer for Cardano DeFi with a deep exploration for cypherpunk values: Self-sovereign, P2P DeFi Kernel, shared liquidity, no batchers, UDC open intents, and more. In development.

Examples and Boilerplates:

• ⭐ Builder Fest 2026 Challenge: Builder Fest 2026 Ticket Sale dapp solved on GCScript DSL intents and an HTML frontend:
  • Plutus script (validator) parametrization on user’s wallets. Feature to deploy your own.
  • Query beacon tokens to get last dapp on-chain state
  • Plutus transactions using deployed validators.
  • Cryptographically-verifiable, on-chain, reusable GCScript library with GCFS. Feature to deploy your own.
  • For Cypherpunks only: bypass frontend completely and buy the ticket via QR codes, no middleman involved!
• ⭐ 90+ full open source example dapps:
  • The famous examples included on Playground, the built-in IDE of GameChanger Wallet
  • GCScript DSL code
  • HTML5 frontend code using new Official Library @gamechanger-finance/gc, and zero custom backends!
  • HTML5 frontend code with zero external dependencies, and zero custom backends!
  • QR code dapp connectors included
• ⭐ Examples using Official Library @gamechanger-finance/gc:
  • Kitchen Sink: URL, QR, HTML, React, ExpressJs, all output format in one example
  • URL
  • QR (png)
  • QR (svg)
  • Button
  • HTML5 Dapp
  • ReactJs Dapp
  • ExpressJs Backend
• gc-connect: great open-dapp boilerplate to integrate UDC/GameChanger Wallet
  • Software that powers ARP Radio and Moments integrations.
  • Rich integration, pointing user directly to import/create pages for best UX
  • Developed by SudoScientist
• Unimatrix Live Demo: Signing Bot and Pasive listener for multisig transactions on private obfuscated channels using Unimatrix Sync. With Universal Dapp Connector it builds and signs multi-signature transactions fully on users wallets, on client-side. With 4 built-in use cases :
  • 3 transactions in 1 dapp connection call: Be sure to have more than 3 UTXOs available as you will be using GameChanger Wallet’s well known multi-transaction multisig features, otherwise you will face a missing balance screen.
  • Token sale: a decentralized, backend-less, token sale with instant, in-user-wallet multisig minting
  • NFT sale: a decentralized, backend-less, NTF sale with instant, in-user-wallet multisig minting
  • Passive mode: monitor announced transactions live, letting users manually sign and share their transactions by connecting their wallets. Handy for DAOs and user groups, or single users with semi-cold wallet setups.
• gc-contract-app
  • educational dapp by Maarten Menheere for Gimbalabs that shows how GameChanger Wallet is like a PAB for the web
  • It builds a smart contract on-the-fly using Helios Language,
  • like many GC dapps it does not use backends
• Helios Timelock
  • First dapp on Cardano working from hosted source code stored on-chain.
  • The PAB for the web: Helios smart contract code compiled on-the-fly on GameChanger dapp connections
  • The big picture behind GameChanger Dapps explained on-dapp for the Cardano Community
• Cardano-Relay: A Cardano IOT integration on ESP8266, a 32-bit 80 MHz microcontroller in less than 40Kb of RAM
  • a cryptographically-secured WiFi lamp control, from mobile or desktop
  • written in C/C++ and GCScript DSL
  • No middlemen. Direct device - wallet connection
  • Privacy preserving, device run a cryptographic authorization but without knowing the actual allowed user wallet
  • CIP-8 signature flow even using Ledger Nano X to sign
  • Announcement on X
• Swap Limit Order: P2P DeFi Kernel over intents with UDC + GCScript DSL. (Demo coming soon!)
  • by Agustin Badi in collaboration with Adriano Fiorenza, initially made for a presentation at Cardano Foundation Dev Office Hours

Tools:

• ⭐ Kitchen Sink: URL, QR, HTML, React, ExpressJs, all output format in one example
• Gift Wallet Generator: A simple dapp to generate and fund GameChanger Gift Wallets in bulk for events, workshops and classrooms:
  • Simple frontend leveraging on GCScript DSL intents
  • Generates gift wallets in bulk using custom patterns for labels, passwords, descriptions,etc..
  • Packs outputs on a few transactions to fund them in bulk
  • Creates a special read-only workspace to monitor the generated addresses on your own mobile/desktop GameChanger wallet
  • Powering crypto events worldwide like: https://x.com/blockdev_id/status/1875363843758854462
• Inception IDE Beta
  • First stand-alone IDE for building Cardano dapps fully online (client side PAB)
  • in browser, no cardano-node deployment required.
  • on-chain and off-chain code, Helios Language, GCScript and externaly-built Plutus Scripts
  • dapp <–> wallet connections you code here can be used on your own backends and frontends
  • By Maarten Menheere. Github
• M2Tec Gift Wallet Printing Tool: Nice tool to bundle Gift Wallets as paper wallets, suitable for printing
• Official CLI Tool @gamechanger-finance/gc:URL, QR, HTML, React, ExpressJs, all output format in one CLI tool

Special Use Cases

• M2Tec - Hardware and Software Dapps (first hardware dapps on Cardano powered by GameChanger universal dapp connector)
  • M2Tec Paypads: Payment devices for stores, with Odoo integration for ADA and native asset payments, loyalty tokens and more.
  • M2Tec Cardano Totem: The first Cardano ATM-like public terminals with built-in stake pool
• GCFS examples (GameChanger On-Chain File System):
  • Voting Dapp for Catalyst Proposals
• DJack - Decentralized Email Inbox on Cardano: By our friend Javi Ribo
  • powered by SSI
  • no minting required
• DCorps - Digital Companies Registry on Cardano (GameChanger V1)
• Dandelion Contributor Portal (GameChanger V1)
• Powering crypto events worldwide, like hackatons and classrooms: https://x.com/blockdev_id/status/1875363843758854462

Some videos and articles:

• Do you build Web2.9 or Web3? - Workshop at UTN Buenos Aires - 30/07/2024 (spanish)
• NFTPass RareEvo - onboarding on Cardano at scale
• GCFS - Permapinning files on Cardano forever
• GCFS - Fiat Payroll using Oracles (not focused on solving scheduling!)
• QR code payment requests - The magic behind M2Tec hardware dapps
• Is Cardano ecosystem decentralized?

Resources

• General Documentation
• How to connect?
• Beta Release Notes
• 70+ open source example dapps
• Universal Dapp Connector documentation
• GCScript documentation
• Playground IDE in GameChanger Wallet
• Catalyst
• Youtube Tutorials
• Discord Support
• Twitter News
• Website

Screenshots

GameChanger Wallet V2 Beta status

GameChanger Wallet V2 Beta phase has officially ended.

Thank you for participating all these years of heavy development and testing!

Migrate to the Production V2 now as this release is now deprecated and may not receive updates anymore!

In order to migrate read this

These are the old URLs to access:

• Mainnet wallet
• Pre-Production Testnet wallet

License

MIT

Thanks

Special thanks to Roberto, Maarten, Quasar, Javi, Juan, Max, Sudo and Ratio for all your support. You are Cardano!.

And to voters and Project Catalyst for supporting part of this development across the years.

Let’s keep building alternative tooling and standards to decentralize deeper our great Cardano Ecosystem

— Founder and Dev Adriano Fiorenza

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