This repository has moved to the VirtoSDK

Libwallet

A lightweight and very portable library with simple to understand and use abstractions that allow creating chain-agnostic crypto wallets able to run in all kinds of environments like native applications, hosted wallets, the browser or even embedded hardware.

Core principles:

• Ease of use
  A high level public API abstracts blockchain and cryptography heavy concepts. i.e. Account abstracts handling of private keys and their metadata. Vault makes it simple to support multiple types of credentials and back-ends that store private keys in different ways, whether it is a cryptographic hardware module, a database or a file system.
  In the future this abstractions could be used to integrate with different ledger-like back-ends including regular bank accounts.

• Security
  Written in safe Rust and based on of production ready crypto primitives. Also encourages good practices like the use of pin protected sub-accounts derived from the root account as a form of second factor authentication or a two step signing process where transactions are added to a queue for review before being signed.

• Multi-chain and extensibility
  No assumptions are made about what the kind of private keys and signatures different vaults use to be able to support any chain's cryptography.
  Core functionality of wallets and accounts can be extended to support chain specific features. There is initial focus on supporting Substrate based chains adding features like formatting addresses using their network prefix or use metadata to validate what's being signed and simplify the creation of signed extrinsics.

• Portability and small footprint
  Being no_std and WASM friendly users can create wallets for the wide range of platforms and computer architectures supported by Rust. Dependencies are kept to a minimum and any extra non-core functionality is set behind feature flags that users can enable only when needed.

Use in Virto

libwallet is developed by the Virto Network team, a parachain focused in decentralized commerce infrastructure for the Polkadot ecosystem, Virto aims to bridge real world products/services and the common folk to the growing but not so user friendly world of interconnected blockchains.
This library will be used as the core component of the Wallet API, one of Virto's decentralizable, composable and easy to use HTTP APIs that run as plugins of the Valor runtime. SummaVault will be our main vault implementation that integrates the Matrix protocol allowing users to sign-up to a homeserver using familiar credentials and have out of the box key management, multi-device support and encrypted account backup among others.