storage: split cuprate-blockchain <-> cuprate-database (#160)

* storage: port some code `cuprate-blockchain` -> `database`

* database: remove `Tables` references

* database: remove old `cuprate-blockchain` type references

* find/replace `cuprate_blockchain` -> `database`, add `create_db()`

* database: fix redb

* database: use readme for docs, link in `lib.rs`

* database: fix `open_db_ro`, `open_db_rw`, `create_db` behavior

* database: add open table tests

* database: fix tests, remove blockchain specific references

* database: remove `ReaderThreads`, make `db_directory` mandatory

* initial `cuprate-blockchain` split

* fix doc links

* rename, fix database config

* blockchain: create `crate::open()`, `OpenTables::create_tables()`

* more compat fixes

* fix imports

* fix conflicts

* align cargo.toml

* docs

* fixes

* add `unused_crate_dependencies` lint, fix

* blockchain: add open table tests

consensus/fast-sync/src/create.rs

@@ -3,7 +3,9 @@ use std::{fmt::Write, fs::write};
 use clap::Parser;
 use tower::{Service, ServiceExt};
 
-use cuprate_blockchain::{config::ConfigBuilder, service::DatabaseReadHandle, RuntimeError};
+use cuprate_blockchain::{
+    config::ConfigBuilder, cuprate_database::RuntimeError, service::DatabaseReadHandle,
+};
 use cuprate_types::blockchain::{BCReadRequest, BCResponse};
 
 use cuprate_fast_sync::{hash_of_hashes, BlockId, HashOfHashes};

storage/blockchain/Cargo.toml

@@ -9,30 +9,28 @@ repository  = "https://github.com/Cuprate/cuprate/tree/main/storage/cuprate-bloc
 keywords    = ["cuprate", "blockchain", "database"]
 
 [features]
-default   = ["heed", "redb", "service"]
-# default   = ["redb", "service"]
-# default   = ["redb-memory", "service"]
-heed       = ["dep:heed"]
-redb       = ["dep:redb"]
-redb-memory = ["redb"]
+default     = ["heed", "service"]
+# default     = ["redb", "service"]
+# default     = ["redb-memory", "service"]
+heed        = ["cuprate-database/heed"]
+redb        = ["cuprate-database/redb"]
+redb-memory = ["cuprate-database/redb-memory"]
 service     = ["dep:crossbeam", "dep:futures", "dep:tokio", "dep:tokio-util", "dep:tower", "dep:rayon"]
 
 [dependencies]
-bitflags = { workspace = true, features = ["serde", "bytemuck"] }
-bytemuck = { version = "1.14.3", features = ["must_cast", "derive", "min_const_generics", "extern_crate_alloc"] }
-bytes    = { workspace = true }
-cfg-if   = { workspace = true }
 # FIXME:
 # We only need the `thread` feature if `service` is enabled.
 # Figure out how to enable features of an already pulled in dependency conditionally.
+cuprate-database = { path = "../database" }
 cuprate-helper   = { path = "../../helper", features = ["fs", "thread", "map"] }
 cuprate-types    = { path = "../../types", features = ["blockchain"] }
+
+bitflags         = { workspace = true, features = ["serde", "bytemuck"] }
+bytemuck         = { version = "1.14.3", features = ["must_cast", "derive", "min_const_generics", "extern_crate_alloc"] }
 curve25519-dalek = { workspace = true }
 cuprate-pruning  = { path = "../../pruning" }
 monero-serai     = { workspace = true, features = ["std"] }
 paste            = { workspace = true }
-page_size        = { version = "0.6.0" } # Needed for database resizes, they must be a multiple of the OS page size.
-thiserror        = { workspace = true }
 
 # `service` feature.
 crossbeam    = { workspace = true, features = ["std"], optional = true }
@@ -43,17 +41,12 @@ tower        = { workspace = true, features = ["full"], optional = true }
 thread_local = { workspace = true }
 rayon        = { workspace = true, optional = true }
 
-# Optional features.
-heed  = { version = "0.20.0", features = ["read-txn-no-tls"], optional = true }
-redb  = { version = "2.1.0", optional = true }
-serde = { workspace = true, optional = true }
-
 [dev-dependencies]
-bytemuck = { version = "1.14.3", features = ["must_cast", "derive", "min_const_generics", "extern_crate_alloc"] }
-cuprate-helper = { path = "../../helper", features = ["thread"] }
+cuprate-helper     = { path = "../../helper", features = ["thread"] }
 cuprate-test-utils = { path = "../../test-utils" }
-page_size = { version = "0.6.0" }
-tempfile = { version = "3.10.0" }
+
+bytemuck          = { version = "1.14.3", features = ["must_cast", "derive", "min_const_generics", "extern_crate_alloc"] }
+tempfile          = { version = "3.10.0" }
 pretty_assertions = { workspace = true }
-hex = { workspace = true }
-hex-literal = { workspace = true }
+hex               = { workspace = true }
+hex-literal       = { workspace = true }