78d9be7e09
Amendment "flapping" (an amendment repeatedly gaining and losing majority) usually occurs when an amendment is on the verge of gaining majority, and a validator not in favor of the amendment goes offline or loses sync. This fix makes two changes: 1. The number of validators in the UNL determines the threshold required for an amendment to gain majority. 2. The AmendmentTable keeps a record of the most recent Amendment vote received from each trusted validator (and, with `trustChanged`, stays up-to-date when the set of trusted validators changes). If no validation arrives from a given validator, then the AmendmentTable assumes that the previously-received vote has not changed. In other words, when missing an `STValidation` from a remote validator, each server now uses the last vote seen. There is a 24 hour timeout for recorded validator votes. These changes do not require an amendment because they do not impact transaction processing, but only the threshold at which each individual validator decides to propose an EnableAmendment pseudo-transaction. Fix #4350
rippled Source
Some of these directories come from entire outside repositories brought in
using [git-subtree][]. This means that the source files are inserted directly
into the rippled repository. They can be edited and committed just as if they
were normal files.
[git-subtree]: https://github.com/apenwarr/git-subtree
If you create a commit that contains files both from a subtree, and from the
rippled source tree, please use care when designing the commit message, since
it will appear in the subtree's individual repository when the changes are
pushed back to the upstream. Better yet, do not mix files from subtrees and
ripple in the same commit at all.
Source folders:
| Folder | Upstream Repo | Description |
|---|---|---|
beast |
N/A | legacy utility code that was formerly associated with boost::beast |
ed25519-donna |
https://github.com/floodyberry/ed25519-donna | Ed25519 digital signatures |
ripple |
N/A | Core source code for rippled |
secp256k1 |
https://github.com/bitcoin-core/secp256k1 | ECDSA digital signatures using the secp256k1 curve |
test |
N/A | Unit tests for rippled |
The following dependencies are downloaded and built using ExternalProject (or FetchContent, where possible). Refer to CMakeLists.txt file for details about how these sources are built :
| Name | Upstream Repo | Description |
|---|---|---|
lz4 |
https://github.com/lz4/lz4 | LZ4 lossless compression algorithm |
nudb |
https://github.com/vinniefalco/NuDB | Constant-time insert-only key/value database for SSD drives (Less memory usage than RocksDB.) |
snappy |
https://github.com/google/snappy | "Snappy" lossless compression algorithm. |
soci |
https://github.com/SOCI/soci | Abstraction layer for database access. |
sqlite |
https://www.sqlite.org/src | An embedded database engine that writes to simple files. |
rocksdb |
https://github.com/facebook/rocksdb | Fast key/value database. (Supports rotational disks better than NuDB.) |
protobuf |
https://github.com/google/protobuf | Protocol buffer data interchange format. Only downloaded/built if a suitable version is not found by find_package, or if the local_protobuf option is explicitly set |