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70 lines
3.9 KiB
Markdown
70 lines
3.9 KiB
Markdown
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---
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layout: post
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title: Monero 0.9.0 "Hydrogen Helix" Released
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summary: A major release in Monero's history, too much to summarise!
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tags: [releases]
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author: Riccardo Spagni (fluffypony)
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---
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*January 1st, 2016*
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## Summary of Changes
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Too much to describe. Represents a major release in Monero's history, over a year-and-a-half in the making. Some highlights:
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- moved from in-RAM database to a backend-agnostic blockchain database
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- created an LMDB blockchainDB implementation (with the help of Howard Chu, the creator of LMDB)
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- created a BerkeleyDB blockchainDB implementation
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- created an OS-agnostic raw blockchain format
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- built tools to convert between blockchain implementations, as well as import and export them
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- added ARM support
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- brought back 32-bit support (WIP)
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- added QoS (bandwidth control)
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- added [OpenAlias](https://openalias.org) support
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- fixed all (previously broken) unit tests and core tests
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- implemented daemonize for proper backgrounding of the Monero daemon
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- drastically increased sync speed
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- included block headers in the source
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- designed and implemented a stealth payment ID scheme
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- designed and implemented a unified address+payment ID scheme
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- implemented a hard fork mechanism
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- changed the block time to 2 minutes
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- implemented the [MRL-0001](https://lab.getmonero.org/pubs/MRL-0001.pdf) and [MRL-0004](https://lab.getmonero.org/pubs/MRL-0004.pdf) recommendations
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- added tons of simplewallet / rpcwallet / daemon commands
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- added a dust handler to simplewallet
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- created a multilanguage mechanism, implemented in simplewallet
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- bug fixes, bug fixes, bug fixes
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- completely overhauled the CMake (with the help of Kitware, the creators of CMake)
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- added a bad peer auto-banning mechanism
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- refactored a ton of code, added a ton of comments
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- added a core crypto implementation based on SUPERCOP ref10
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- switched to a triangular distribution for output selection
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- added multiple new mnemonic wordlists, including Russian and Italian
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- created a "trusted daemon" system for remote daemon use
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In total this represents 922 commits worth of work by 9 contributors. This will probably be the biggest release in Monero's history, everything from here on out can be done as faster point releases.
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## Updating: Blockchain Conversion
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It is highly recommended that you delete the contents of your Monero working directory and sync from scratch. This directory can be found in ```~/.bitmonero``` on Linux and OS X, and on Windows in ```\Users\username\AppData\Roaming\bitmonero``` or ```\ProgramData\bitmonero```.
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Syncing from scratch is EXTREMELY fast in this version, pretty much at bittorrent speeds, and will leave you with a fully verified blockchain.
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*Alternatively*: if you want to grab the bootstrap (NOTE: there is a new bootstrap format!) off the website then you can get it at https://downloads.getmonero.org/blockchain.raw - once downloaded you can import it with ```blockchain_import --input-file /path/to/your/download.raw```. If you're particularly brave you can pass the ```--verify 0``` flag to skip verification during import.
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*If you REALLY want to convert your old blockchain*: you can either use the ```blockchain_converter``` tool, or you can use ```blockchain_export``` to create a blockchain.raw, followed by ```blockchain_import``` to import it into the new LMDB format.
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## Official Download Links
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- [Windows, 64-bit](https://downloads.getmonero.org/monero.win.x64.v0-9-0-0.zip)
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- [OS X, 64-bit](https://downloads.getmonero.org/monero.mac.x64.v0-9-0-0.tar.bz2)
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- [Linux, 64-bit](https://downloads.getmonero.org/monero.linux.x64.v0-9-0-0.tar.bz2)
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## Download Hashes
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If you would like to verify that you have downloaded the correct file, please use the following SHA256 hashes:
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- monero.win.x64.v0-9-0-0.zip, c61284c4d5f78db2bc2072bef76f2b539293cca74bdd3fb9536a35ca54b4fd2e
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- monero.linux.x64.v0-9-0-0.tar.bz2, 655875a899aded6d63f99c5dfea6a45b3e77533bb2173e63612646ec7ac97100
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- monero.mac.x64.v0-9-0-0.tar.bz2, fce5140d9cb38d62ad1b9f1b0d06feaa209433f9ec542b8d368ef9e0da431b78
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