Michael Sproul 92d597ad23 Modularise slasher backend (#3443) ... ## Proposed Changes Enable multiple database backends for the slasher, either MDBX (default) or LMDB. The backend can be selected using `--slasher-backend={lmdb,mdbx}`. ## Additional Info In order to abstract over the two library's different handling of database lifetimes I've used `Box::leak` to give the `Environment` type a `'static` lifetime. This was the only way I could think of using 100% safe code to construct a self-referential struct `SlasherDB`, where the `OpenDatabases` refers to the `Environment`. I think this is OK, as the `Environment` is expected to live for the life of the program, and both database engines leave the database in a consistent state after each write. The memory claimed for memory-mapping will be freed by the OS and appropriately flushed regardless of whether the `Environment` is actually dropped. We are depending on two `sigp` forks of `libmdbx-rs` and `lmdb-rs`, to give us greater control over MDBX OS support and LMDB's version.		2022-08-15 01:30:56 +00:00
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environment	Decrease proposer boost to 40% (#3201)	2022-05-23 03:52:31 +00:00
src	Add lighthouse db command (#3129)	2022-04-01 00:58:59 +00:00
tests	Modularise slasher backend (#3443)	2022-08-15 01:30:56 +00:00
Cargo.toml	Modularise slasher backend (#3443)	2022-08-15 01:30:56 +00:00