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64 lines
2.7 KiB
Markdown
64 lines
2.7 KiB
Markdown
---
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entry: P2Pool
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summary: 'Peer to peer mining pool for Monero'
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terms: ["P2Pool", "monero-p2pool"]
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---
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{% include disclaimer.html translated="no" translationOutdated="no" %}
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### The Basics
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Monero P2Pool is a peer-to-peer Monero @mining pool developed by SChernykh
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(also known as sech1). P2Pool was a concept first developed for the
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Bitcoin blockchain but was never fully realized due to certain limitations,
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mainly because it had a problem with orphaned @blocks which is solved in
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Monero P2Pool with uncle blocks.
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Unlike a traditional mining pool, P2Pool allows it's users to fully control
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their own @node and what it mines. P2Pool has no central server that can be
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shutdown/blocked because it uses a separate blockchain to @merge-mine with
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Monero. It is designed so that all blocks found by the pool pay out to the
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miners immediately which means that funds are never in custody of a single
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party.
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To accomplish this P2Pool uses PPLNS payout scheme which rewards miners only
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once the block has been found by the pool; miners with a share in the PPLNS
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window are rewarded directly via the @coinbase-transaction reward for the
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block.
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### More Information
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P2Pool is a @sidechain to Monero, and P2Pool blocks are potentially Monero
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@blocks. Each miner submits block templates that include a payout for all of
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the miners that currently have shares in the PPLNS window. High quality
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block templates are added to the P2Pool blockchain as blocks which count as
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"shares" for the miner who found them.
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If a block is good enough to be a Monero block it is also submitted to the
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Monero network to be included in its blockchain. Once the Monero block is
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confirmed by the network, those miners are directly paid in the
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@coinbase-transaction because they were included already in the block
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template.
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If P2Pool "shares" are found at the same block height as an existing share,
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it is included as an uncle block (worth 20% less than a normal share) so
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miners still get paid for it (uncle blocks can be submitted up to 3 blocks
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behind the current height and still be included).
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### Technical Details
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Monero P2Pool is written from scratch in C++. It uses the high-performance
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libuv library so each node is able to handle thousands of concurrent miner
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connections. There are 2160 blocks in the PPLNS window with a block time of
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10 seconds (approximately 6 hours).
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The number of blocks was chosen so that the minimum payout would be
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approximately 0.0004 XMR (this amount was considered high enough that it
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could be transferred with minimal fees). Each individual miner payout takes
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only 38 bytes on the Monero blockchain.
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### External Links
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- [P2Pool source](https://github.com/SChernykh/p2pool)
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- [P2Pool pool stats](https://p2pool.io)
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- [P2Pool Observer (mining data)](https://p2pool.observer)
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