The Sallet ecosystem

Sallet stands as a fortified Bitcoin wallet ecosystem, designed for seasoned users seeking paramount security and full autonomy. Its low-level architecture empowers users with granular control over Bitcoin transactions, ensuring multi-layered security measures. This platform offers diverse avenues for leveraging fundamental Bitcoin functionalities, catering to advanced users' need for heightened sovereignty over their assets. Sallet allows users to issue their own NFT's over Bitcoin. It also trackS Users NFT balance across the spectrum of issued tokens. While offering means to trace the entirety of their issued NFT’s, users gain comprehensive control over their NFT ecosystem.

Modules in the Sallet system

• Sallet Visor - Handles public-only data, serving as a world-facing online Secure Wallet App.

• Sallet Head - An air-gapped unit for transaction signing and key management on dedicated, fully self-custodied hardware.

• Sallet Neck - (as of now part of Visor) Manages token issuance and tracking for self-issued Tokens and NFTs.

Security Design

Sallet prioritizes robust security measures against potential threats. The development approach explicitly assumes an environment compromised not only by malicious software but also by zero-day compromised hardware. To address security concerns, Sallet employs:

Air-Gapped Setup

• Private keys are generated and stored offline.

• Signatures are generated in an airgapped environment.

• Custom-made analogue entropy is an option for users.

Data Handling

• Transactions are signed on the airgapped HEAD device.

• Data transfer from the HEAD unit to the world-facing VISOR module occurs via analogue means.

• Zero-knowledge tests regularly check for irregularities caused by malicious code or compromised hardware components.

Tip	This design ensures a resilient security setup, even in an adversarial environment, by strictly controlling data flow and continuously verifying against threats posed by software vulnerabilities and potentially compromised hardware elements.

Visuals and Whitelabeling

Utilizing Kivy, our framework enables effortless customization of layout, colors, images, fonts, and widget appearance. Developers unfamiliar with Python can easily redesign the app by manipulating the .ky file, akin to styling with CSS. This flexibility extends to saving multiple layouts within the app, offering a seamless choice at program launch. Additionally, this streamlined process encompasses whitelabeling tasks.

Sallet VISOR: Secure Wallet Module

Sallet Visor is a module within the Sallet system, developed by Sziller and Team at sziller.eu. The actual wallet application of the Sallet ecosystem. You can take a look at current development under: https://www.github.com/sziller/_sallet_visor VISOR serves as an advanced, low-level Bitcoin wallet that exclusively manages public data. Designed with extreme security in mind, VISOR offers:

Featureset

• Coin selection

• Direct node support

• 3rd party node selection

• NFT minting

• Token management

• …​ and is the gateway to the airgapped HEAD unit

Platform Support

VISOR is currently under development for Linux OS and Android Mobiles, with plans to expand to other platforms in the future. It can be used both as Mobile App or Desktop software.