Bart 36d3429a79 ci: Check that every matrix config reaches the tier it declares
CI runs only the jobs generate.py emits, so a config that falls out of the
matrix size it belongs to takes its coverage with it and fails nothing. Add
validate_linux_matrices(), called on every invocation, which checks that no two
configs expand to the same name, that minimal is part of full and full part of
extended, that each config reaches the sizes its flags ask for and no others,
and that the extended tier is not empty. The checks name no config, only the
flags, so adding or removing one needs no edit there. Reject a config declaring
both "minimal" and "extended", which the filtering would drop from the minimal
matrix, the opposite of what it asked for. Extract expand_linux_config() so the
checks and the matrix builder cannot disagree about what a config expands to.

The script never sees the event that triggered the run, so it cannot tell
whether this run should have asked for the extended configs at all, and a
condition that stops matching the events would drop them and fail nothing.
So move the three GENERATE_ variables to job level, where the generate step and
a new check read the same values, and have that check re-run the generator with
--extended and compare. It runs only on the events that must produce the
extended matrix.

Proved by mutation: seven edits to linux.json and to the filtering each fail,
and the message names the config that moved. The generated matrix is
byte-identical to the previous one across all seven argument combinations, so
the extraction changed no job.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-09-24 20:24:25 +02:00

codecov

The XRP Ledger

The XRP Ledger is a decentralized cryptographic ledger powered by a network of peer-to-peer nodes. The XRP Ledger uses a novel Byzantine Fault Tolerant consensus algorithm to settle and record transactions in a secure distributed database without a central operator.

XRP

XRP is a public, counterparty-free crypto-asset native to the XRP Ledger, and is designed as a gas token for network services and to bridge different currencies. XRP is traded on the open-market and is available for anyone to access. The XRP Ledger was created in 2012 with a finite supply of 100 billion units of XRP.

xrpld

The server software that powers the XRP Ledger is called xrpld and is available in this repository under the permissive ISC open-source license. The xrpld server software is written primarily in C++ and runs on a variety of platforms. The xrpld 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. (xrpld Reporting Mode has been replaced by Clio.)

Build from Source

Key Features of the XRP Ledger

  • 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 XRP 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 XRP at least an order of magnitude ahead of other top digital assets.
  • Finite XRP Supply: When the XRP Ledger began, 100 billion XRP were created, and no more XRP will ever be created. The available supply of XRP decreases slowly over time as small amounts are destroyed to pay transaction fees.
  • Responsible Software Governance: A team of full-time developers at Ripple & other organizations maintain and continually improve the XRP Ledger's underlying software with contributions from the open-source community. Ripple acts as a steward for the technology and an advocate for its interests.
  • Secure, Adaptable Cryptography: The XRP 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 XRP 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 XRP 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 XRP useful on its own, the XRP 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 XRP Ledger can settle long, cross-currency payment paths and exchanges of multiple currencies in atomic transactions, bridging gaps of trust with XRP.

Source Code

Here are some good places to start learning the source code:

  • Read the markdown files in the source tree: src/xrpld/**/*.md.
  • Read the levelization document to get an idea of the internal dependency graph.
  • In the big picture, the main function constructs an ApplicationImp object, which implements the Application virtual interface. Almost every component in the application takes an Application& parameter in its constructor, typically named app and stored as a member variable app_. This allows most components to depend on any other component.

Repository Contents

Folder Contents
./bin Scripts and data files for XRPL developers.
./Builds Platform-specific guides for building xrpld.
./docs Source documentation files and doxygen config.
./cfg Example configuration files.
./src Source code.
./crates Rust source code.

Some of the directories under src are external repositories included using git-subtree. See those directories' README files for more details.

Additional Documentation

See Also

Description
Decentralized cryptocurrency blockchain daemon implementing the XRP Ledger protocol in C++
Readme 383 MiB
Languages
C++ 98.5%
CMake 0.5%
Python 0.5%
Shell 0.2%
Mako 0.1%
Other 0.1%