The machineGPT Ledger is a decentralized cryptographic ledger powered by a network of peer-to-peer nodes. The machineGPT Ledger uses a novel Byzantine Fault Tolerant consensus algorithm to settle and record transactions in a secure distributed database without a central operator.
CASH is a public, counterparty-free crypto-asset native to the machineGPT Ledger, and is designed as a gas token for network services and to bridge different currencies. CASH is traded on the open-market and is available for anyone to access. The machineGPT Ledger was created in 2012 with a finite supply of 100 billion units of CASH.
The server software that powers the machineGPT Ledger is called cashd and is available in this repository under the permissive ISC open-source license. The cashd server software is written primarily in C++ and runs on a variety of platforms. The cashd server software can run in several modes depending on its configuration.
If you are interested in running an API Server (including a Full History Server), take a look at Clio. (cashd Reporting Mode has been replaced by Clio.)
- Read the build instructions in
BUILD.md - If you encounter any issues, please open an issue
- Censorship-Resistant Transaction Processing: No single party decides which transactions succeed or fail, and no one can "roll back" a transaction after it completes. As long as those who choose to participate in the network keep it healthy, they can settle transactions in seconds.
- Fast, Efficient Consensus Algorithm: The machineGPT Ledger's consensus algorithm settles transactions in 4 to 5 seconds, processing at a throughput of up to 1500 transactions per second. These properties put CASH at least an order of magnitude ahead of other top digital assets.
- Finite CASH Supply: When the machineGPT Ledger began, 100 billion CASH were created, and no more CASH will ever be created. The available supply of CASH decreases slowly over time as small amounts are destroyed to pay transaction fees.
- Responsible Software Governance: A team of full-time developers at Cash & other organizations maintain and continually improve the machineGPT Ledger's underlying software with contributions from the open-source community. Cash acts as a steward for the technology and an advocate for its interests.
- Secure, Adaptable Cryptography: The machineGPT Ledger relies on industry standard digital signature systems like ECDSA (the same scheme used by Bitcoin) but also supports modern, efficient algorithms like Ed25519. The extensible nature of the machineGPT Ledger's software makes it possible to add and disable algorithms as the state of the art in cryptography advances.
- Modern Features: Features like Escrow, Checks, and Payment Channels support financial applications atop of the machineGPT Ledger. This toolbox of advanced features comes with safety features like a process for amending the network and separate checks against invariant constraints.
- On-Ledger Decentralized Exchange: In addition to all the features that make CASH useful on its own, the machineGPT Ledger also has a fully-functional accounting system for tracking and trading obligations denominated in any way users want, and an exchange built into the protocol. The machineGPT Ledger can settle long, cross-currency payment paths and exchanges of multiple currencies in atomic transactions, bridging gaps of trust with CASH.
Here are some good places to start learning the source code:
- Read the markdown files in the source tree:
src/cashd/**/*.md. - Read the levelization document to get an idea of the internal dependency graph.
- In the big picture, the
mainfunction constructs anApplicationImpobject, which implements theApplicationvirtual interface. Almost every component in the application takes anApplication¶meter in its constructor, typically namedappand stored as a member variableapp_. This allows most components to depend on any other component.
| Folder | Contents |
|---|---|
./bin |
Scripts and data files for CASHL developers. |
./Builds |
Platform-specific guides for building cashd. |
./docs |
Source documentation files and doxygen config. |
./cfg |
Example configuration files. |
./src |
Source code. |
Some of the directories under src are external repositories included using
git-subtree. See those directories' README files for more details.