cuprate/storage/blockchain/README.md

106 lines
3.6 KiB
Markdown
Raw Normal View History

Cuprate's blockchain database.
This documentation is mostly for practical usage of `cuprate_blockchain`.
Database (#35) * rename `database` -> `old_database` Keeping it around for reference until new implementation is complete. * create new `database/` skeleton * add `DATABASE.md` design doc skeleton * move design doc to `database/README.md` * add rough code * `lib.rs` -> `gist.rs` * database: use workspace deps * workspace: include `database/` as member CI will now include this crate. * cargo fmt * database: `AGPL` -> `MIT` * readme: add `TODO`s * add base files * cargo.toml: add `heed` feature * fix clippy * lib.rs: add extremely pedantic lints * readme: add `# Backends` * cargo.toml: add `cfg-if` * add `backend/` structure * base `database.rs` * cargo.toml: add `borsh` * backend: add `DATABASE_BACKEND` * base `error.rs` * base `database.rs` * base `transaction.rs` * base `table.rs` * lib.rs: add imports * add `pod.rs` * pod: use `Read/Write`, add tests for all primitive numbers * pod: impl Pod for `Vec<u8>`, `[u8; N]` * pod: add docs, add `private::Sealed` * pod: `to_writer`, `from_reader` The new `as_bytes` + `from_bytes` now allows (de)serializing from bytes directly instead of going through Read/Write. Different array return sizes are abstracted away with `-> impl AsRef<[u8]>` * pod: impl Pod for `Box<[u8]>` * pod: return `Err` on incorrect length in `from_bytes()` * pod: docs * pod: impl Pod for `Arc<[u8]>` * readme: docs * database: add `create_table()`, `get_table()` * table: `Pod` bound * backend: move into directories * pod: add `into_bytes()` * heed: impl `BytesEncode`, `BytesDecode` * add `actor`, `service` features The thread/actor system used will be gated behind `actor`, and the `tower/tokio` integration will be gated behind `service`. * add `lib.rs` docs * service: add `service.rs` * service: add `reader.rs` * service: add `writer.rs` * service: add `request.rs` & `response.rs` * cargo.toml: add `crossbeam` * service: add/use `enum Request`, `enum Response` * service: basic signatures for thread-pools, `Writer` -> `Writers` * service: split `tower::Service<ReadRequest/WriteRequest>` * service: impl `tower::Service` for `Database(Reader|Writer)` * service: add `init()`, impl basic `Reader/Writer` pools * service: add example `Request`'s * service: add example `ReadRequest` handling * temporarily allow clippy lints * readme: update file structure * transaction: add `RoTx::get_range()` * service: module docs * cargo.toml: add `cuprate-helper` * service: scale readers/writers based on thread count * database: change lifetimes * heed: impl Database for `heed` * heed: add `ConcreteRoTx`, `ConcreteRwTx`, impl Tx traits * docs * service: `read.rs` docs * service: `write.rs` docs * service: request/response docs * service: use `OnceLock` in `init()`, add `db_read()`, `db_write()` * service: leak database into `&'static` * database: add `#[inline]`, `#[cold]` * service: `free.rs` docs, more `#[inline]` + `#[cold]` * service: add `shutdown()` * service: add `Request::Shutdown` * service: `shutdown()` docs * heed: hide concrete tx types * lib.rs: add terms * split `Env` <-> `Database` * cargo.toml: add `paste` * database: add `tables/` * impl `serde/borsh` where possible * tables: add `Tables`, add test docs * make db backend mutually exclusive to fix `--all-features` * tables: use `$()*` in `tables!()` * cargo.toml: add `sanakirja 1.4.0` * sanakirja: impl `Env` * sanakirja: impl `Database` * sanakirja: impl `Transaction` * table: temporarily fix `sanakirja` K/V bounds * table: fix `#[cfg]` * cargo.toml: fix deps * lib.rs: docs * service: docs * readme: add files, update `# Documentation`, add `# Layers` * readme: `src/` file purpose * readme: `src/service/` file purpose * readme: `src/backend/` file purpose * fix `Cargo.lock` merge conflict * database: remove `gist.rs` * add to `constants.rs` * add top `//! comments` for files/modules * constants: add sanity-check test * service: add `only_one_database` test in `free.rs` * service: add `tests.rs` * remove unneeded markers + imports * backend: fix `get_range()`'s trait `impl` return * env: add `create_tables_if_needed()`, don't return `Option<Db>` * sort imports by `CONTRIBUTING.md` rules oops sorry boog * add `monero.rs` * monero: docs * database: add missing `RoTx/RwTx` inputs * backend: add missing `RoTx/RwTx` inputs * `monero.rs` trait -> free functions in `ops/` * pod: make methods infallible * ci: add `rustup update` step * service: use `Arc` instead of leaking, remove `db_read/db_write` * service: use `InfallibleOneshotReceiver` for readers * service: shutdown on error, add todos * service: remove `Request` * service: combine `ReadResponse` and `WriteResponse` * service: use `InfallibleOneshotReceiver` for writer * service: only spawn 1 writer, don't allow cloning writer handle * table: add associated `const CONSTANT_SIZE` * add `key.rs` + `trait Key`, add bound to `Table` * fix typos
2024-02-13 17:43:25 +00:00
For a high-level overview, see the database section in
[Cuprate's architecture book](https://architecture.cuprate.org).
Database (#35) * rename `database` -> `old_database` Keeping it around for reference until new implementation is complete. * create new `database/` skeleton * add `DATABASE.md` design doc skeleton * move design doc to `database/README.md` * add rough code * `lib.rs` -> `gist.rs` * database: use workspace deps * workspace: include `database/` as member CI will now include this crate. * cargo fmt * database: `AGPL` -> `MIT` * readme: add `TODO`s * add base files * cargo.toml: add `heed` feature * fix clippy * lib.rs: add extremely pedantic lints * readme: add `# Backends` * cargo.toml: add `cfg-if` * add `backend/` structure * base `database.rs` * cargo.toml: add `borsh` * backend: add `DATABASE_BACKEND` * base `error.rs` * base `database.rs` * base `transaction.rs` * base `table.rs` * lib.rs: add imports * add `pod.rs` * pod: use `Read/Write`, add tests for all primitive numbers * pod: impl Pod for `Vec<u8>`, `[u8; N]` * pod: add docs, add `private::Sealed` * pod: `to_writer`, `from_reader` The new `as_bytes` + `from_bytes` now allows (de)serializing from bytes directly instead of going through Read/Write. Different array return sizes are abstracted away with `-> impl AsRef<[u8]>` * pod: impl Pod for `Box<[u8]>` * pod: return `Err` on incorrect length in `from_bytes()` * pod: docs * pod: impl Pod for `Arc<[u8]>` * readme: docs * database: add `create_table()`, `get_table()` * table: `Pod` bound * backend: move into directories * pod: add `into_bytes()` * heed: impl `BytesEncode`, `BytesDecode` * add `actor`, `service` features The thread/actor system used will be gated behind `actor`, and the `tower/tokio` integration will be gated behind `service`. * add `lib.rs` docs * service: add `service.rs` * service: add `reader.rs` * service: add `writer.rs` * service: add `request.rs` & `response.rs` * cargo.toml: add `crossbeam` * service: add/use `enum Request`, `enum Response` * service: basic signatures for thread-pools, `Writer` -> `Writers` * service: split `tower::Service<ReadRequest/WriteRequest>` * service: impl `tower::Service` for `Database(Reader|Writer)` * service: add `init()`, impl basic `Reader/Writer` pools * service: add example `Request`'s * service: add example `ReadRequest` handling * temporarily allow clippy lints * readme: update file structure * transaction: add `RoTx::get_range()` * service: module docs * cargo.toml: add `cuprate-helper` * service: scale readers/writers based on thread count * database: change lifetimes * heed: impl Database for `heed` * heed: add `ConcreteRoTx`, `ConcreteRwTx`, impl Tx traits * docs * service: `read.rs` docs * service: `write.rs` docs * service: request/response docs * service: use `OnceLock` in `init()`, add `db_read()`, `db_write()` * service: leak database into `&'static` * database: add `#[inline]`, `#[cold]` * service: `free.rs` docs, more `#[inline]` + `#[cold]` * service: add `shutdown()` * service: add `Request::Shutdown` * service: `shutdown()` docs * heed: hide concrete tx types * lib.rs: add terms * split `Env` <-> `Database` * cargo.toml: add `paste` * database: add `tables/` * impl `serde/borsh` where possible * tables: add `Tables`, add test docs * make db backend mutually exclusive to fix `--all-features` * tables: use `$()*` in `tables!()` * cargo.toml: add `sanakirja 1.4.0` * sanakirja: impl `Env` * sanakirja: impl `Database` * sanakirja: impl `Transaction` * table: temporarily fix `sanakirja` K/V bounds * table: fix `#[cfg]` * cargo.toml: fix deps * lib.rs: docs * service: docs * readme: add files, update `# Documentation`, add `# Layers` * readme: `src/` file purpose * readme: `src/service/` file purpose * readme: `src/backend/` file purpose * fix `Cargo.lock` merge conflict * database: remove `gist.rs` * add to `constants.rs` * add top `//! comments` for files/modules * constants: add sanity-check test * service: add `only_one_database` test in `free.rs` * service: add `tests.rs` * remove unneeded markers + imports * backend: fix `get_range()`'s trait `impl` return * env: add `create_tables_if_needed()`, don't return `Option<Db>` * sort imports by `CONTRIBUTING.md` rules oops sorry boog * add `monero.rs` * monero: docs * database: add missing `RoTx/RwTx` inputs * backend: add missing `RoTx/RwTx` inputs * `monero.rs` trait -> free functions in `ops/` * pod: make methods infallible * ci: add `rustup update` step * service: use `Arc` instead of leaking, remove `db_read/db_write` * service: use `InfallibleOneshotReceiver` for readers * service: shutdown on error, add todos * service: remove `Request` * service: combine `ReadResponse` and `WriteResponse` * service: use `InfallibleOneshotReceiver` for writer * service: only spawn 1 writer, don't allow cloning writer handle * table: add associated `const CONSTANT_SIZE` * add `key.rs` + `trait Key`, add bound to `Table` * fix typos
2024-02-13 17:43:25 +00:00
If you're looking for a database crate, consider using the lower-level
[`cuprate-database`](https://doc.cuprate.org/cuprate_database)
crate that this crate is built on-top of.
# Purpose
This crate does 3 things:
1. Uses [`cuprate_database`] as a base database layer
1. Implements various `Monero` related [operations](ops), [tables], and [types]
1. Exposes a [`tower::Service`] backed by a thread-pool
Database (#35) * rename `database` -> `old_database` Keeping it around for reference until new implementation is complete. * create new `database/` skeleton * add `DATABASE.md` design doc skeleton * move design doc to `database/README.md` * add rough code * `lib.rs` -> `gist.rs` * database: use workspace deps * workspace: include `database/` as member CI will now include this crate. * cargo fmt * database: `AGPL` -> `MIT` * readme: add `TODO`s * add base files * cargo.toml: add `heed` feature * fix clippy * lib.rs: add extremely pedantic lints * readme: add `# Backends` * cargo.toml: add `cfg-if` * add `backend/` structure * base `database.rs` * cargo.toml: add `borsh` * backend: add `DATABASE_BACKEND` * base `error.rs` * base `database.rs` * base `transaction.rs` * base `table.rs` * lib.rs: add imports * add `pod.rs` * pod: use `Read/Write`, add tests for all primitive numbers * pod: impl Pod for `Vec<u8>`, `[u8; N]` * pod: add docs, add `private::Sealed` * pod: `to_writer`, `from_reader` The new `as_bytes` + `from_bytes` now allows (de)serializing from bytes directly instead of going through Read/Write. Different array return sizes are abstracted away with `-> impl AsRef<[u8]>` * pod: impl Pod for `Box<[u8]>` * pod: return `Err` on incorrect length in `from_bytes()` * pod: docs * pod: impl Pod for `Arc<[u8]>` * readme: docs * database: add `create_table()`, `get_table()` * table: `Pod` bound * backend: move into directories * pod: add `into_bytes()` * heed: impl `BytesEncode`, `BytesDecode` * add `actor`, `service` features The thread/actor system used will be gated behind `actor`, and the `tower/tokio` integration will be gated behind `service`. * add `lib.rs` docs * service: add `service.rs` * service: add `reader.rs` * service: add `writer.rs` * service: add `request.rs` & `response.rs` * cargo.toml: add `crossbeam` * service: add/use `enum Request`, `enum Response` * service: basic signatures for thread-pools, `Writer` -> `Writers` * service: split `tower::Service<ReadRequest/WriteRequest>` * service: impl `tower::Service` for `Database(Reader|Writer)` * service: add `init()`, impl basic `Reader/Writer` pools * service: add example `Request`'s * service: add example `ReadRequest` handling * temporarily allow clippy lints * readme: update file structure * transaction: add `RoTx::get_range()` * service: module docs * cargo.toml: add `cuprate-helper` * service: scale readers/writers based on thread count * database: change lifetimes * heed: impl Database for `heed` * heed: add `ConcreteRoTx`, `ConcreteRwTx`, impl Tx traits * docs * service: `read.rs` docs * service: `write.rs` docs * service: request/response docs * service: use `OnceLock` in `init()`, add `db_read()`, `db_write()` * service: leak database into `&'static` * database: add `#[inline]`, `#[cold]` * service: `free.rs` docs, more `#[inline]` + `#[cold]` * service: add `shutdown()` * service: add `Request::Shutdown` * service: `shutdown()` docs * heed: hide concrete tx types * lib.rs: add terms * split `Env` <-> `Database` * cargo.toml: add `paste` * database: add `tables/` * impl `serde/borsh` where possible * tables: add `Tables`, add test docs * make db backend mutually exclusive to fix `--all-features` * tables: use `$()*` in `tables!()` * cargo.toml: add `sanakirja 1.4.0` * sanakirja: impl `Env` * sanakirja: impl `Database` * sanakirja: impl `Transaction` * table: temporarily fix `sanakirja` K/V bounds * table: fix `#[cfg]` * cargo.toml: fix deps * lib.rs: docs * service: docs * readme: add files, update `# Documentation`, add `# Layers` * readme: `src/` file purpose * readme: `src/service/` file purpose * readme: `src/backend/` file purpose * fix `Cargo.lock` merge conflict * database: remove `gist.rs` * add to `constants.rs` * add top `//! comments` for files/modules * constants: add sanity-check test * service: add `only_one_database` test in `free.rs` * service: add `tests.rs` * remove unneeded markers + imports * backend: fix `get_range()`'s trait `impl` return * env: add `create_tables_if_needed()`, don't return `Option<Db>` * sort imports by `CONTRIBUTING.md` rules oops sorry boog * add `monero.rs` * monero: docs * database: add missing `RoTx/RwTx` inputs * backend: add missing `RoTx/RwTx` inputs * `monero.rs` trait -> free functions in `ops/` * pod: make methods infallible * ci: add `rustup update` step * service: use `Arc` instead of leaking, remove `db_read/db_write` * service: use `InfallibleOneshotReceiver` for readers * service: shutdown on error, add todos * service: remove `Request` * service: combine `ReadResponse` and `WriteResponse` * service: use `InfallibleOneshotReceiver` for writer * service: only spawn 1 writer, don't allow cloning writer handle * table: add associated `const CONSTANT_SIZE` * add `key.rs` + `trait Key`, add bound to `Table` * fix typos
2024-02-13 17:43:25 +00:00
Each layer builds on-top of the previous.
Database (#35) * rename `database` -> `old_database` Keeping it around for reference until new implementation is complete. * create new `database/` skeleton * add `DATABASE.md` design doc skeleton * move design doc to `database/README.md` * add rough code * `lib.rs` -> `gist.rs` * database: use workspace deps * workspace: include `database/` as member CI will now include this crate. * cargo fmt * database: `AGPL` -> `MIT` * readme: add `TODO`s * add base files * cargo.toml: add `heed` feature * fix clippy * lib.rs: add extremely pedantic lints * readme: add `# Backends` * cargo.toml: add `cfg-if` * add `backend/` structure * base `database.rs` * cargo.toml: add `borsh` * backend: add `DATABASE_BACKEND` * base `error.rs` * base `database.rs` * base `transaction.rs` * base `table.rs` * lib.rs: add imports * add `pod.rs` * pod: use `Read/Write`, add tests for all primitive numbers * pod: impl Pod for `Vec<u8>`, `[u8; N]` * pod: add docs, add `private::Sealed` * pod: `to_writer`, `from_reader` The new `as_bytes` + `from_bytes` now allows (de)serializing from bytes directly instead of going through Read/Write. Different array return sizes are abstracted away with `-> impl AsRef<[u8]>` * pod: impl Pod for `Box<[u8]>` * pod: return `Err` on incorrect length in `from_bytes()` * pod: docs * pod: impl Pod for `Arc<[u8]>` * readme: docs * database: add `create_table()`, `get_table()` * table: `Pod` bound * backend: move into directories * pod: add `into_bytes()` * heed: impl `BytesEncode`, `BytesDecode` * add `actor`, `service` features The thread/actor system used will be gated behind `actor`, and the `tower/tokio` integration will be gated behind `service`. * add `lib.rs` docs * service: add `service.rs` * service: add `reader.rs` * service: add `writer.rs` * service: add `request.rs` & `response.rs` * cargo.toml: add `crossbeam` * service: add/use `enum Request`, `enum Response` * service: basic signatures for thread-pools, `Writer` -> `Writers` * service: split `tower::Service<ReadRequest/WriteRequest>` * service: impl `tower::Service` for `Database(Reader|Writer)` * service: add `init()`, impl basic `Reader/Writer` pools * service: add example `Request`'s * service: add example `ReadRequest` handling * temporarily allow clippy lints * readme: update file structure * transaction: add `RoTx::get_range()` * service: module docs * cargo.toml: add `cuprate-helper` * service: scale readers/writers based on thread count * database: change lifetimes * heed: impl Database for `heed` * heed: add `ConcreteRoTx`, `ConcreteRwTx`, impl Tx traits * docs * service: `read.rs` docs * service: `write.rs` docs * service: request/response docs * service: use `OnceLock` in `init()`, add `db_read()`, `db_write()` * service: leak database into `&'static` * database: add `#[inline]`, `#[cold]` * service: `free.rs` docs, more `#[inline]` + `#[cold]` * service: add `shutdown()` * service: add `Request::Shutdown` * service: `shutdown()` docs * heed: hide concrete tx types * lib.rs: add terms * split `Env` <-> `Database` * cargo.toml: add `paste` * database: add `tables/` * impl `serde/borsh` where possible * tables: add `Tables`, add test docs * make db backend mutually exclusive to fix `--all-features` * tables: use `$()*` in `tables!()` * cargo.toml: add `sanakirja 1.4.0` * sanakirja: impl `Env` * sanakirja: impl `Database` * sanakirja: impl `Transaction` * table: temporarily fix `sanakirja` K/V bounds * table: fix `#[cfg]` * cargo.toml: fix deps * lib.rs: docs * service: docs * readme: add files, update `# Documentation`, add `# Layers` * readme: `src/` file purpose * readme: `src/service/` file purpose * readme: `src/backend/` file purpose * fix `Cargo.lock` merge conflict * database: remove `gist.rs` * add to `constants.rs` * add top `//! comments` for files/modules * constants: add sanity-check test * service: add `only_one_database` test in `free.rs` * service: add `tests.rs` * remove unneeded markers + imports * backend: fix `get_range()`'s trait `impl` return * env: add `create_tables_if_needed()`, don't return `Option<Db>` * sort imports by `CONTRIBUTING.md` rules oops sorry boog * add `monero.rs` * monero: docs * database: add missing `RoTx/RwTx` inputs * backend: add missing `RoTx/RwTx` inputs * `monero.rs` trait -> free functions in `ops/` * pod: make methods infallible * ci: add `rustup update` step * service: use `Arc` instead of leaking, remove `db_read/db_write` * service: use `InfallibleOneshotReceiver` for readers * service: shutdown on error, add todos * service: remove `Request` * service: combine `ReadResponse` and `WriteResponse` * service: use `InfallibleOneshotReceiver` for writer * service: only spawn 1 writer, don't allow cloning writer handle * table: add associated `const CONSTANT_SIZE` * add `key.rs` + `trait Key`, add bound to `Table` * fix typos
2024-02-13 17:43:25 +00:00
As a user of `cuprate_blockchain`, consider using the higher-level [`service`] module,
or at the very least the [`ops`] module instead of interacting with the `cuprate_database` traits directly.
Database (#35) * rename `database` -> `old_database` Keeping it around for reference until new implementation is complete. * create new `database/` skeleton * add `DATABASE.md` design doc skeleton * move design doc to `database/README.md` * add rough code * `lib.rs` -> `gist.rs` * database: use workspace deps * workspace: include `database/` as member CI will now include this crate. * cargo fmt * database: `AGPL` -> `MIT` * readme: add `TODO`s * add base files * cargo.toml: add `heed` feature * fix clippy * lib.rs: add extremely pedantic lints * readme: add `# Backends` * cargo.toml: add `cfg-if` * add `backend/` structure * base `database.rs` * cargo.toml: add `borsh` * backend: add `DATABASE_BACKEND` * base `error.rs` * base `database.rs` * base `transaction.rs` * base `table.rs` * lib.rs: add imports * add `pod.rs` * pod: use `Read/Write`, add tests for all primitive numbers * pod: impl Pod for `Vec<u8>`, `[u8; N]` * pod: add docs, add `private::Sealed` * pod: `to_writer`, `from_reader` The new `as_bytes` + `from_bytes` now allows (de)serializing from bytes directly instead of going through Read/Write. Different array return sizes are abstracted away with `-> impl AsRef<[u8]>` * pod: impl Pod for `Box<[u8]>` * pod: return `Err` on incorrect length in `from_bytes()` * pod: docs * pod: impl Pod for `Arc<[u8]>` * readme: docs * database: add `create_table()`, `get_table()` * table: `Pod` bound * backend: move into directories * pod: add `into_bytes()` * heed: impl `BytesEncode`, `BytesDecode` * add `actor`, `service` features The thread/actor system used will be gated behind `actor`, and the `tower/tokio` integration will be gated behind `service`. * add `lib.rs` docs * service: add `service.rs` * service: add `reader.rs` * service: add `writer.rs` * service: add `request.rs` & `response.rs` * cargo.toml: add `crossbeam` * service: add/use `enum Request`, `enum Response` * service: basic signatures for thread-pools, `Writer` -> `Writers` * service: split `tower::Service<ReadRequest/WriteRequest>` * service: impl `tower::Service` for `Database(Reader|Writer)` * service: add `init()`, impl basic `Reader/Writer` pools * service: add example `Request`'s * service: add example `ReadRequest` handling * temporarily allow clippy lints * readme: update file structure * transaction: add `RoTx::get_range()` * service: module docs * cargo.toml: add `cuprate-helper` * service: scale readers/writers based on thread count * database: change lifetimes * heed: impl Database for `heed` * heed: add `ConcreteRoTx`, `ConcreteRwTx`, impl Tx traits * docs * service: `read.rs` docs * service: `write.rs` docs * service: request/response docs * service: use `OnceLock` in `init()`, add `db_read()`, `db_write()` * service: leak database into `&'static` * database: add `#[inline]`, `#[cold]` * service: `free.rs` docs, more `#[inline]` + `#[cold]` * service: add `shutdown()` * service: add `Request::Shutdown` * service: `shutdown()` docs * heed: hide concrete tx types * lib.rs: add terms * split `Env` <-> `Database` * cargo.toml: add `paste` * database: add `tables/` * impl `serde/borsh` where possible * tables: add `Tables`, add test docs * make db backend mutually exclusive to fix `--all-features` * tables: use `$()*` in `tables!()` * cargo.toml: add `sanakirja 1.4.0` * sanakirja: impl `Env` * sanakirja: impl `Database` * sanakirja: impl `Transaction` * table: temporarily fix `sanakirja` K/V bounds * table: fix `#[cfg]` * cargo.toml: fix deps * lib.rs: docs * service: docs * readme: add files, update `# Documentation`, add `# Layers` * readme: `src/` file purpose * readme: `src/service/` file purpose * readme: `src/backend/` file purpose * fix `Cargo.lock` merge conflict * database: remove `gist.rs` * add to `constants.rs` * add top `//! comments` for files/modules * constants: add sanity-check test * service: add `only_one_database` test in `free.rs` * service: add `tests.rs` * remove unneeded markers + imports * backend: fix `get_range()`'s trait `impl` return * env: add `create_tables_if_needed()`, don't return `Option<Db>` * sort imports by `CONTRIBUTING.md` rules oops sorry boog * add `monero.rs` * monero: docs * database: add missing `RoTx/RwTx` inputs * backend: add missing `RoTx/RwTx` inputs * `monero.rs` trait -> free functions in `ops/` * pod: make methods infallible * ci: add `rustup update` step * service: use `Arc` instead of leaking, remove `db_read/db_write` * service: use `InfallibleOneshotReceiver` for readers * service: shutdown on error, add todos * service: remove `Request` * service: combine `ReadResponse` and `WriteResponse` * service: use `InfallibleOneshotReceiver` for writer * service: only spawn 1 writer, don't allow cloning writer handle * table: add associated `const CONSTANT_SIZE` * add `key.rs` + `trait Key`, add bound to `Table` * fix typos
2024-02-13 17:43:25 +00:00
# `cuprate_database`
Consider reading `cuprate_database`'s crate documentation before this crate, as it is the first layer.
Database (#35) * rename `database` -> `old_database` Keeping it around for reference until new implementation is complete. * create new `database/` skeleton * add `DATABASE.md` design doc skeleton * move design doc to `database/README.md` * add rough code * `lib.rs` -> `gist.rs` * database: use workspace deps * workspace: include `database/` as member CI will now include this crate. * cargo fmt * database: `AGPL` -> `MIT` * readme: add `TODO`s * add base files * cargo.toml: add `heed` feature * fix clippy * lib.rs: add extremely pedantic lints * readme: add `# Backends` * cargo.toml: add `cfg-if` * add `backend/` structure * base `database.rs` * cargo.toml: add `borsh` * backend: add `DATABASE_BACKEND` * base `error.rs` * base `database.rs` * base `transaction.rs` * base `table.rs` * lib.rs: add imports * add `pod.rs` * pod: use `Read/Write`, add tests for all primitive numbers * pod: impl Pod for `Vec<u8>`, `[u8; N]` * pod: add docs, add `private::Sealed` * pod: `to_writer`, `from_reader` The new `as_bytes` + `from_bytes` now allows (de)serializing from bytes directly instead of going through Read/Write. Different array return sizes are abstracted away with `-> impl AsRef<[u8]>` * pod: impl Pod for `Box<[u8]>` * pod: return `Err` on incorrect length in `from_bytes()` * pod: docs * pod: impl Pod for `Arc<[u8]>` * readme: docs * database: add `create_table()`, `get_table()` * table: `Pod` bound * backend: move into directories * pod: add `into_bytes()` * heed: impl `BytesEncode`, `BytesDecode` * add `actor`, `service` features The thread/actor system used will be gated behind `actor`, and the `tower/tokio` integration will be gated behind `service`. * add `lib.rs` docs * service: add `service.rs` * service: add `reader.rs` * service: add `writer.rs` * service: add `request.rs` & `response.rs` * cargo.toml: add `crossbeam` * service: add/use `enum Request`, `enum Response` * service: basic signatures for thread-pools, `Writer` -> `Writers` * service: split `tower::Service<ReadRequest/WriteRequest>` * service: impl `tower::Service` for `Database(Reader|Writer)` * service: add `init()`, impl basic `Reader/Writer` pools * service: add example `Request`'s * service: add example `ReadRequest` handling * temporarily allow clippy lints * readme: update file structure * transaction: add `RoTx::get_range()` * service: module docs * cargo.toml: add `cuprate-helper` * service: scale readers/writers based on thread count * database: change lifetimes * heed: impl Database for `heed` * heed: add `ConcreteRoTx`, `ConcreteRwTx`, impl Tx traits * docs * service: `read.rs` docs * service: `write.rs` docs * service: request/response docs * service: use `OnceLock` in `init()`, add `db_read()`, `db_write()` * service: leak database into `&'static` * database: add `#[inline]`, `#[cold]` * service: `free.rs` docs, more `#[inline]` + `#[cold]` * service: add `shutdown()` * service: add `Request::Shutdown` * service: `shutdown()` docs * heed: hide concrete tx types * lib.rs: add terms * split `Env` <-> `Database` * cargo.toml: add `paste` * database: add `tables/` * impl `serde/borsh` where possible * tables: add `Tables`, add test docs * make db backend mutually exclusive to fix `--all-features` * tables: use `$()*` in `tables!()` * cargo.toml: add `sanakirja 1.4.0` * sanakirja: impl `Env` * sanakirja: impl `Database` * sanakirja: impl `Transaction` * table: temporarily fix `sanakirja` K/V bounds * table: fix `#[cfg]` * cargo.toml: fix deps * lib.rs: docs * service: docs * readme: add files, update `# Documentation`, add `# Layers` * readme: `src/` file purpose * readme: `src/service/` file purpose * readme: `src/backend/` file purpose * fix `Cargo.lock` merge conflict * database: remove `gist.rs` * add to `constants.rs` * add top `//! comments` for files/modules * constants: add sanity-check test * service: add `only_one_database` test in `free.rs` * service: add `tests.rs` * remove unneeded markers + imports * backend: fix `get_range()`'s trait `impl` return * env: add `create_tables_if_needed()`, don't return `Option<Db>` * sort imports by `CONTRIBUTING.md` rules oops sorry boog * add `monero.rs` * monero: docs * database: add missing `RoTx/RwTx` inputs * backend: add missing `RoTx/RwTx` inputs * `monero.rs` trait -> free functions in `ops/` * pod: make methods infallible * ci: add `rustup update` step * service: use `Arc` instead of leaking, remove `db_read/db_write` * service: use `InfallibleOneshotReceiver` for readers * service: shutdown on error, add todos * service: remove `Request` * service: combine `ReadResponse` and `WriteResponse` * service: use `InfallibleOneshotReceiver` for writer * service: only spawn 1 writer, don't allow cloning writer handle * table: add associated `const CONSTANT_SIZE` * add `key.rs` + `trait Key`, add bound to `Table` * fix typos
2024-02-13 17:43:25 +00:00
If/when this crate needs is used, be sure to use the version that this crate re-exports, e.g.:
```rust
use cuprate_blockchain::{
cuprate_database::RuntimeError,
};
Database (#35) * rename `database` -> `old_database` Keeping it around for reference until new implementation is complete. * create new `database/` skeleton * add `DATABASE.md` design doc skeleton * move design doc to `database/README.md` * add rough code * `lib.rs` -> `gist.rs` * database: use workspace deps * workspace: include `database/` as member CI will now include this crate. * cargo fmt * database: `AGPL` -> `MIT` * readme: add `TODO`s * add base files * cargo.toml: add `heed` feature * fix clippy * lib.rs: add extremely pedantic lints * readme: add `# Backends` * cargo.toml: add `cfg-if` * add `backend/` structure * base `database.rs` * cargo.toml: add `borsh` * backend: add `DATABASE_BACKEND` * base `error.rs` * base `database.rs` * base `transaction.rs` * base `table.rs` * lib.rs: add imports * add `pod.rs` * pod: use `Read/Write`, add tests for all primitive numbers * pod: impl Pod for `Vec<u8>`, `[u8; N]` * pod: add docs, add `private::Sealed` * pod: `to_writer`, `from_reader` The new `as_bytes` + `from_bytes` now allows (de)serializing from bytes directly instead of going through Read/Write. Different array return sizes are abstracted away with `-> impl AsRef<[u8]>` * pod: impl Pod for `Box<[u8]>` * pod: return `Err` on incorrect length in `from_bytes()` * pod: docs * pod: impl Pod for `Arc<[u8]>` * readme: docs * database: add `create_table()`, `get_table()` * table: `Pod` bound * backend: move into directories * pod: add `into_bytes()` * heed: impl `BytesEncode`, `BytesDecode` * add `actor`, `service` features The thread/actor system used will be gated behind `actor`, and the `tower/tokio` integration will be gated behind `service`. * add `lib.rs` docs * service: add `service.rs` * service: add `reader.rs` * service: add `writer.rs` * service: add `request.rs` & `response.rs` * cargo.toml: add `crossbeam` * service: add/use `enum Request`, `enum Response` * service: basic signatures for thread-pools, `Writer` -> `Writers` * service: split `tower::Service<ReadRequest/WriteRequest>` * service: impl `tower::Service` for `Database(Reader|Writer)` * service: add `init()`, impl basic `Reader/Writer` pools * service: add example `Request`'s * service: add example `ReadRequest` handling * temporarily allow clippy lints * readme: update file structure * transaction: add `RoTx::get_range()` * service: module docs * cargo.toml: add `cuprate-helper` * service: scale readers/writers based on thread count * database: change lifetimes * heed: impl Database for `heed` * heed: add `ConcreteRoTx`, `ConcreteRwTx`, impl Tx traits * docs * service: `read.rs` docs * service: `write.rs` docs * service: request/response docs * service: use `OnceLock` in `init()`, add `db_read()`, `db_write()` * service: leak database into `&'static` * database: add `#[inline]`, `#[cold]` * service: `free.rs` docs, more `#[inline]` + `#[cold]` * service: add `shutdown()` * service: add `Request::Shutdown` * service: `shutdown()` docs * heed: hide concrete tx types * lib.rs: add terms * split `Env` <-> `Database` * cargo.toml: add `paste` * database: add `tables/` * impl `serde/borsh` where possible * tables: add `Tables`, add test docs * make db backend mutually exclusive to fix `--all-features` * tables: use `$()*` in `tables!()` * cargo.toml: add `sanakirja 1.4.0` * sanakirja: impl `Env` * sanakirja: impl `Database` * sanakirja: impl `Transaction` * table: temporarily fix `sanakirja` K/V bounds * table: fix `#[cfg]` * cargo.toml: fix deps * lib.rs: docs * service: docs * readme: add files, update `# Documentation`, add `# Layers` * readme: `src/` file purpose * readme: `src/service/` file purpose * readme: `src/backend/` file purpose * fix `Cargo.lock` merge conflict * database: remove `gist.rs` * add to `constants.rs` * add top `//! comments` for files/modules * constants: add sanity-check test * service: add `only_one_database` test in `free.rs` * service: add `tests.rs` * remove unneeded markers + imports * backend: fix `get_range()`'s trait `impl` return * env: add `create_tables_if_needed()`, don't return `Option<Db>` * sort imports by `CONTRIBUTING.md` rules oops sorry boog * add `monero.rs` * monero: docs * database: add missing `RoTx/RwTx` inputs * backend: add missing `RoTx/RwTx` inputs * `monero.rs` trait -> free functions in `ops/` * pod: make methods infallible * ci: add `rustup update` step * service: use `Arc` instead of leaking, remove `db_read/db_write` * service: use `InfallibleOneshotReceiver` for readers * service: shutdown on error, add todos * service: remove `Request` * service: combine `ReadResponse` and `WriteResponse` * service: use `InfallibleOneshotReceiver` for writer * service: only spawn 1 writer, don't allow cloning writer handle * table: add associated `const CONSTANT_SIZE` * add `key.rs` + `trait Key`, add bound to `Table` * fix typos
2024-02-13 17:43:25 +00:00
```
This ensures the types/traits used from `cuprate_database` are the same ones used by `cuprate_blockchain` internally.
# Feature flags
Different database backends are enabled by the feature flags:
- `heed` (LMDB)
- `redb`
The default is `heed`.
`tracing` is always enabled and cannot be disabled via feature-flag.
<!-- FIXME: tracing should be behind a feature flag -->
# Invariants when not using `service`
`cuprate_blockchain` can be used without the `service` module but
there are some things that must be kept in mind when doing so.
Failing to uphold these invariants may cause panics.
1. `LMDB` requires the user to resize the memory map resizing (see [`cuprate_database::RuntimeError::ResizeNeeded`]
1. `LMDB` has a maximum reader transaction count, currently, [it is set to `126`](https://github.com/LMDB/lmdb/blob/b8e54b4c31378932b69f1298972de54a565185b1/libraries/liblmdb/mdb.c#L794-L799)
1. `LMDB` has [maximum key/value byte size](http://www.lmdb.tech/doc/group__internal.html#gac929399f5d93cef85f874b9e9b1d09e0) which must not be exceeded
# Examples
The below is an example of using `cuprate_blockchain`'s
lowest API, i.e. using a mix of this crate and `cuprate_database`'s traits directly -
**this is NOT recommended.**
For examples of the higher-level APIs, see:
- [`ops`]
- [`service`]
```rust
use cuprate_blockchain::{
cuprate_database::{
ConcreteEnv,
Env, EnvInner,
DatabaseRo, DatabaseRw, TxRo, TxRw,
},
config::ConfigBuilder,
tables::{Tables, TablesMut, OpenTables},
};
# fn main() -> Result<(), Box<dyn std::error::Error>> {
// Create a configuration for the database environment.
let tmp_dir = tempfile::tempdir()?;
let db_dir = tmp_dir.path().to_owned();
let config = ConfigBuilder::new()
2024-11-10 20:56:43 +00:00
.data_directory(db_dir.into())
.build();
// Initialize the database environment.
let env = cuprate_blockchain::open(config)?;
// Open up a transaction + tables for writing.
let env_inner = env.env_inner();
let tx_rw = env_inner.tx_rw()?;
let mut tables = env_inner.open_tables_mut(&tx_rw)?;
// ⚠️ Write data to the tables directly.
// (not recommended, use `ops` or `service`).
const KEY_IMAGE: [u8; 32] = [88; 32];
tables.key_images_mut().put(&KEY_IMAGE, &())?;
// Commit the data written.
drop(tables);
TxRw::commit(tx_rw)?;
// Read the data, assert it is correct.
let tx_ro = env_inner.tx_ro()?;
let tables = env_inner.open_tables(&tx_ro)?;
let (key_image, _) = tables.key_images().first()?;
assert_eq!(key_image, KEY_IMAGE);
# Ok(()) }
```