Satsigner

https://twitter.com/pedromvpg/status/1553123963139756032

Why work on this?

Help build a powerful native mobile Bitcoin signer management application
Contribute towards the integration, development and enhancement of Bitcoin UX design
Unlock coin insights via integrated onchain (privacy/provenance/economic) analyses and corresponding data visualisation to help inform, encourage and automate better Bitcoin usage best-pratices
Advance Bitcoin understanding
Test market demand for bitcoin centric applications
Propagate open-source ethos
Build and support Bitcoin and related FOSS projects
Participate in Bitcoin history

Ethos/priorities/design philosophy

Bitcoin only
Sat denomination supremacy
Initial focus on on-chain bitcoin (coin-control/controlling sats)
Emphasis on privacy
Emphasis on personal labeling, tagging, and bookmarking
Application of visualisation/visual-native UI aiming to build upon and develop new Bitcoin design primitives to help make more advanced/poower-user Bitcoin UX/UI more intuitive and accessible
Take advantage of appropriate charts and graphic layouts for all data vizualisation
Security - targetting optimal hot-signer-level security initially (future support for watch-only cold, multisig, vaults etc)
Visually crafted and UX builds upon powerful feattures and improvements introoduced by the many existing brilliant open-soouurce FullyNoded, or Sparrow
An intuitive and powerful mobile bitcoin app

Features

Main features and goals

Experimental bitcoin centric lexicon
- Send bitcoin -> Sign bitcoin messages
- Spend bitcoin -> Consume UTXO
- Bitcoin balance -> Total spendable sats
- Wallet -> Signer
- Private key -> Account
- Address -> Invoice
- Transaction -> Message
- (...)
Bitcoin specific UX patterns
Bitcoin technology education
Visual personal chain analysis
UTXO control
Fully open source
Easily reproducible
Open source dependencies only
Bitcoin interface exclusively via open source library

Forward looking ambitions

Mobile collaborative transaction interface (mobile joinmarket client?)
Native lightning support built with LDK (keeping with UX/Data visual-focus)

Stack

Backend

Bitcoin Development Kit via RN-BDK - becoming reference Bitcoin dev tools
Blockstream Electrs - performant Bitcoin server interface/signer backend to bootstrap users who don't yet run their own node
Photon SDK - powerful mobile Bitcoin dev kit to build forgiving, easy backup and recovery, intuitive signers
Tor - private communications with your personal nodeserver/electrs

Frontend

Design/product inspiration + revered FOSS projects

Sparrow - very powerful and clean native Bitcoin signer management desktop app
FullyNoded - very powerful iOS app focused on remote full node management
BitFeed - beautiful, psychedelic block/transaction/timechain visualisation
Mempool.space - beautiful block explorer and Bitcoin data visualisations
Zeus - pretty, increasingly powerful remote LN node management app

UI

Concepts

UTXO selection

Security

Verification

UTXO consumption

Dev Environment Setup

Prerequisites

Node.js (minimum version 20.9.0)
Yarn

Android

Go to the React Native CLI Quickstart
Choose your Development OS and Target OS of Android
Follow the directions in the "Installing dependencies" section to setup RN dependencies including Node, the React Native command line interface, a JDK, Android Studio, and Watchman if on macOS.
From satsigner repo, to install satsigner dependencies yarn
Run satsigner yarn start yarn android

From time to time you may need to update dependencies with yarn.

iOS

Go to the React Native CLI Quickstart
Choose macOS and iOS
Follow the directions in the "Installing dependencies" section to setup RN dependencies including Node, Watchman, the React Native command line interface, Xcode and CocoaPods.
From satsigner repo, to install satsigner dependencies yarn
Install pods cd ios && pod install
Run satsigner yarn start yarn ios

From time to time you may need to pod install and update dependencies with yarn.

Fahad-Mahmood / satsigner