What is opentxs?

Open-Transactions is a free, open-source toolkit that lets anyone issue currencies, trade on markets, and handle digital financial agreements without relying on a traditional bank. It provides the building blocks for creating custom financial systems where you can issue your own currency or stock, pay dividends, send and receive digital cash, write and deposit cheques, set up escrow, or script custom recurring payment agreements. At a high level, the project provides a library and command-line interface that implement strong financial cryptography. The system is designed so that balances cannot be changed, even by a malicious server. Transactions are unforgeable, the digital cash is untraceable, and cheques cannot be repudiated. It achieves this by using cryptographic receipts that are both redundant and destructible, ensuring the integrity of the financial records. This toolkit would be used by developers building alternative financial platforms, community currency organizers, or fintech founders who want to create custom monetary systems outside traditional banking infrastructure. For example, a group wanting to launch a local community currency could use this software to issue the currency, manage user accounts, and facilitate trading, all backed by cryptographic guarantees rather than trust in a central authority. The project is written in C++ and uses the CMake build system. It offers some flexibility in how data is stored and networked, with optional support for SQLite databases or filesystem storage. The project enforces strict code quality standards, running automated checks to ensure code formatting and catch potential errors. Developers can also get started quickly using Docker to build and test the command-line interface.