| Commit message (Collapse) | Author | Age | Files | Lines |
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Daemons intended for public use can be set up to require payment
in the form of hashes in exchange for RPC service. This enables
public daemons to receive payment for their work over a large
number of calls. This system behaves similarly to a pool, so
payment takes the form of valid blocks every so often, yielding
a large one off payment, rather than constant micropayments.
This system can also be used by third parties as a "paywall"
layer, where users of a service can pay for use by mining Monero
to the service provider's address. An example of this for web
site access is Primo, a Monero mining based website "paywall":
https://github.com/selene-kovri/primo
This has some advantages:
- incentive to run a node providing RPC services, thereby promoting the availability of third party nodes for those who can't run their own
- incentive to run your own node instead of using a third party's, thereby promoting decentralization
- decentralized: payment is done between a client and server, with no third party needed
- private: since the system is "pay as you go", you don't need to identify yourself to claim a long lived balance
- no payment occurs on the blockchain, so there is no extra transactional load
- one may mine with a beefy server, and use those credits from a phone, by reusing the client ID (at the cost of some privacy)
- no barrier to entry: anyone may run a RPC node, and your expected revenue depends on how much work you do
- Sybil resistant: if you run 1000 idle RPC nodes, you don't magically get more revenue
- no large credit balance maintained on servers, so they have no incentive to exit scam
- you can use any/many node(s), since there's little cost in switching servers
- market based prices: competition between servers to lower costs
- incentive for a distributed third party node system: if some public nodes are overused/slow, traffic can move to others
- increases network security
- helps counteract mining pools' share of the network hash rate
- zero incentive for a payer to "double spend" since a reorg does not give any money back to the miner
And some disadvantages:
- low power clients will have difficulty mining (but one can optionally mine in advance and/or with a faster machine)
- payment is "random", so a server might go a long time without a block before getting one
- a public node's overall expected payment may be small
Public nodes are expected to compete to find a suitable level for
cost of service.
The daemon can be set up this way to require payment for RPC services:
monerod --rpc-payment-address 4xxxxxx \
--rpc-payment-credits 250 --rpc-payment-difficulty 1000
These values are an example only.
The --rpc-payment-difficulty switch selects how hard each "share" should
be, similar to a mining pool. The higher the difficulty, the fewer
shares a client will find.
The --rpc-payment-credits switch selects how many credits are awarded
for each share a client finds.
Considering both options, clients will be awarded credits/difficulty
credits for every hash they calculate. For example, in the command line
above, 0.25 credits per hash. A client mining at 100 H/s will therefore
get an average of 25 credits per second.
For reference, in the current implementation, a credit is enough to
sync 20 blocks, so a 100 H/s client that's just starting to use Monero
and uses this daemon will be able to sync 500 blocks per second.
The wallet can be set to automatically mine if connected to a daemon
which requires payment for RPC usage. It will try to keep a balance
of 50000 credits, stopping mining when it's at this level, and starting
again as credits are spent. With the example above, a new client will
mine this much credits in about half an hour, and this target is enough
to sync 500000 blocks (currently about a third of the monero blockchain).
There are three new settings in the wallet:
- credits-target: this is the amount of credits a wallet will try to
reach before stopping mining. The default of 0 means 50000 credits.
- auto-mine-for-rpc-payment-threshold: this controls the minimum
credit rate which the wallet considers worth mining for. If the
daemon credits less than this ratio, the wallet will consider mining
to be not worth it. In the example above, the rate is 0.25
- persistent-rpc-client-id: if set, this allows the wallet to reuse
a client id across runs. This means a public node can tell a wallet
that's connecting is the same as one that connected previously, but
allows a wallet to keep their credit balance from one run to the
other. Since the wallet only mines to keep a small credit balance,
this is not normally worth doing. However, someone may want to mine
on a fast server, and use that credit balance on a low power device
such as a phone. If left unset, a new client ID is generated at
each wallet start, for privacy reasons.
To mine and use a credit balance on two different devices, you can
use the --rpc-client-secret-key switch. A wallet's client secret key
can be found using the new rpc_payments command in the wallet.
Note: anyone knowing your RPC client secret key is able to use your
credit balance.
The wallet has a few new commands too:
- start_mining_for_rpc: start mining to acquire more credits,
regardless of the auto mining settings
- stop_mining_for_rpc: stop mining to acquire more credits
- rpc_payments: display information about current credits with
the currently selected daemon
The node has an extra command:
- rpc_payments: display information about clients and their
balances
The node will forget about any balance for clients which have
been inactive for 6 months. Balances carry over on node restart.
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0da09ed protocol: fix syncing from peers being too choosy about peers (moneromooo-monero)
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88c9d90 protocol: initialize block_weight in block_complete_entry ctor (moneromooo-monero)
fe443bb cryptonote: don't leave block_weight uninitialized (moneromooo-monero)
1ba9baf tx_pool: do not divide by 0 (moneromooo-monero)
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CID 204479
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3455efa ban peers sending bad pow outright (moneromooo-monero)
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PoW is expensive to verify, so be strict
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8330e77 monerod can now sync from pruned blocks (moneromooo-monero)
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If the peer (whether pruned or not itself) supports sending pruned blocks
to syncing nodes, the pruned version will be sent along with the hash
of the pruned data and the block weight. The original tx hashes can be
reconstructed from the pruned txes and theur prunable data hash. Those
hashes and the block weights are hashes and checked against the set of
precompiled hashes, ensuring the data we received is the original data.
It is currently not possible to use this system when not using the set
of precompiled hashes, since block weights can not otherwise be checked
for validity.
This is off by default for now, and is enabled by --sync-pruned-blocks
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74a23e9 protocol: only print sync complete message when out of precompiled hashes (moneromooo-monero)
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This avoids most premature triggers
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2a7d915 Fixed i2p/tor tx flooding bug (white noise disabled) (vtnerd)
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Revert a96c1a4 and adc16d2 (moneromooo-monero)
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This reverts commit a96c1a46d4b3854252de75cbe09458ad5d1aecb0.
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This reverts commit adc16d2504d3e76b0115791caf10446684d45433.
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2cd4fd8 Changed the use of boost:value_initialized for C++ list initializer (JesusRami)
4ad191f Removed unused boost/value_init header (whyamiroot)
928f4be Make null hash constants constexpr (whyamiroot)
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As a side effect, colouring on Windows should now work
regardless of version
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69465e3 cryptonote_protocol: fix '--no-sync', ignore new blocks and txes (xiphon)
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The check added here (in #5732/#5733) is supposed to disconnect behind
peers when the current node is syncing, but actually disconnects behind
peers always.
We are syncing when `target > our_height`, but the check here triggers
when `target > remote_height`, which is basically always true when the
preceding `m_core.have_block(hshd.top_id)` check is true.
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2aa1134 daemon: display peer address type in print_cn (moneromooo-monero)
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f17dcde Remove unused txs member in NOTIFY_RESPONSE_GET_OBJECT (Doy-lee)
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Any peer that's behind us while syncing is useless to us (though
not to them). This ensures that we don't get our peer slots filled
with peers that we can't use. Once we've synced, we can connect
to them and they can then sync off us if they want.
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When asking for txes in a fluffy transaction, one might ask
for the same (large) tx many times
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Count transactions as well
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Essentially, one can send such a large amount of IDs that core exhausts
all free memory. This issue can theoretically be exploited using very
large CN blockchains, such as Monero.
This is a partial fix. Thanks and credit given to CryptoNote author
'cryptozoidberg' for collaboration and the fix. Also thanks to
'moneromooo'. Referencing HackerOne report #506595.
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b0c552f5 cryptonote_protocol_handler: add block/tx hashes in notify logs (moneromooo-monero)
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c84ea299 cryptonote_basic: some more minor speedups (moneromooo-monero)
e40eb2ad cryptonote_basic: speedup calculate_block_hash (moneromooo-monero)
547a9708 cryptonote: block parsing + hash calculation speedup (moneromooo-monero)
11604b6d blockchain: avoid unneeded block copy (moneromooo-monero)
8461df04 save some database calls when getting top block hash and height (moneromooo-monero)
3bbc3661 Avoid repeated (de)serialization when syncing (moneromooo-monero)
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This saves a duplicate serialization step
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Based on Boolberry work by:
jahrsg <jahr@jahr.me>
cr.zoidberg <crypto.zoidberg@gmail.com>
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eef164f7 cryptonote_protocol_handler: search for syncing peers in "cruise mode" (moneromooo-monero)
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When all our outgoing peer slots are filled, we cycle one peer at
a time looking for syncing peers until we have at least two such
peers. This brings two advantages:
- Peers without incoming connections will find more syncing peers
that before, thereby strengthening network decentralization
- Peers will have more resistance to isolation attacks, as they
are more likely to find a "good" peer than they were before
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a54e81e5 daemon: add '--no-sync' arg to optionally disable blockchain sync (xiphon)
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551104fb daemon: add --public-node mode, RPC port propagation over P2P (xiphon)
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6a3608d3 cryptonote_protocol_handler: pad tx messages when using tor/i2p (moneromooo-monero)
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