Ignotus Peverell
d189770080
* Migrate main node store to LMDB In preparation to using LMDB as a wallet database, migrate the node db. There's no point in having 2 key-value stores. In addition LMDB provides a few advantages as a node db, namely a much faster build (compared to RocksDb), lesser dependencies and transactions. * Migrated p2p store to lmdb, stuff compiles * More fixes, chain tests starting to pass * Fixed txhashset rollback messing with block save and general batch delimitation. Chain tests passing. * rustfmt * LMDB max map size of 10MB isn't really workable. Half TB seems reasonable. * Fix wallet tests * Rather crucial commit was missing * rustfmt * Fixing new merged tests following lmdb changes * rustfmt * * Make txhashset validation read-only on fast sync to avoid having a really long open transaction. * Fix deadlock in new block processing, batch should always be created within a txhashset lock (when they interact). * Comment about batch and txhashset interlacing * Fix store tests to use batch * Externalize wallet config and seed * Converted direct read access to file outputs map to an iterator * Cleaned up and simplified wallet Backend trait: * No more direct mutable access to internal structures (HashMap) * Batch interface for all writes * Remove unneeded read wrapper (read_wallet) * rustfmt * First (incomplete) pass at wallet LMDB backend * Progressing on lmdb backent iml * Added batch impl for LMDB wallet backend. Pretty much done with it, but not sure how to deal with commit (owned). * rustfmt * Wrapping LMDB batch around a refcell to work around borrow rules * Compilation up to grin chain
Grin
Grin is an in-progress implementation of the MimbleWimble protocol. Many characteristics are still undefined but the following constitutes a first set of choices:
- Clean and minimal implementation, aiming to stay as such.
- Follows the MimbleWimble protocol, which provides great anonymity and scaling characteristics.
- Cuckoo Cycle proof of work.
- Relatively fast block time (a minute).
- Fixed block reward over time with a decreasing dilution.
- Transaction fees are based on the number of Outputs created/destroyed and total transaction size.
- Smooth curve for difficulty adjustments.
To learn more, read our introduction to MimbleWimble and Grin.
Status
Grin is still an infant, much is left to be done and contributions are welcome (see below). Check our mailing list archives for the latest status.
Contributing
To get involved, read our contributing docs.
Find us:
- Chat: Gitter.
- Mailing list: join the ~MimbleWimble team and subscribe on Launchpad.
Getting Started
To learn more about the technology, read our introduction.
To build and try out Grin, see the build docs.
Philosophy
Grin likes itself small and easy on the eyes. It wants to be inclusive and welcoming for all walks of life, without judgement. Grin is terribly ambitious, but not at the detriment of others, rather to further us all. It may have strong opinions to stay in line with its objectives, which doesn't mean disrespect of others' ideas.
We believe in pull requests, data and scientific research. We do not believe in unfounded beliefs.
Credits
Tom Elvis Jedusor for the first formulation of MimbleWimble.
Andrew Poelstra for his related work and improvements.
John Tromp for the Cuckoo Cycle proof of work.
J.K. Rowling for making it despite extraordinary adversity.
License
Apache License v2.0.