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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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32d6376 simplewallet: add --restore-from-seed alias (moneromooo-monero)
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It may be more intuitive for some people
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bba5bae implewallet: don't trigger idle lock right after a foreground refresh (moneromooo-monero)
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e85c838 simplewallet: do not print warning for locked coinbase txes (moneromooo-monero)
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since they're all locked for a fixed amount
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93d5cf2 wallet2: add ignore-outputs-{above/below} option (stoffu)
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https://github.com/aeonix/aeon/pull/131
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16498dc simplewallet.cpp - clean up welcome message (SomaticFanatic)
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Fixed a typo ("and -are- not visible to the world by default"), removed a few redundant commas, and capitalized words inside the URL.
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bd9c12e simplewallet: remove erroneously added line under subaddress-lookahead (stoffu)
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f380f69 simplewallet: warn if invalid default ring size is set and actually ignore the setting (stoffu)
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the setting
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11f13da blockchain: fix logging bad number of blocks if first one fails (moneromooo-monero)
19bfe7e simplewallet: fix warnings about useless std::move (moneromooo-monero)
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2ec455d wallet: fix mismatch between two concepts of 'balance' (moneromooo-monero)
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One considers the blockchain, while the other considers the
blockchain and some recent actions, such as a recently created
transaction which spend some outputs, but isn't yet mined.
Typically, the "balance" command wants the latter, to reflect
the recent action, but things like proving ownership wants
the former.
This fixes a crash in get_reserve_proof, where a preliminary
check and the main code used two concepts of "balance".
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87d2f06 simplewallet: moan harder about untrusted nodes (moneromooo-monero)
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New CLI wallet variable: export-format with options "binary" (the default),
or "ascii". "Binary" behaves as before, "ascii" forces the wallet to convert
data to ASCII using base64.
Reading files from the disk tries to auto detect what format has been
used (using a magic string added when exporting the data).
Implements https://github.com/monero-project/monero/issues/2859
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5a91b83 simplewallet: add a few missing settings help text (stoffu)
ae7bf37 simplewallet: fix arg indexing bug in set_device_name (stoffu)
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884df82 wallet: provide original address for outgoing transfers (xiphon)
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65f29a8 simplewallet: add restore_height command (tobtoht)
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0d916a6 Fix incorrectly named binding for MMS send_signer_config command (tobtoht)
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send_message_config isn't used anywhere else in the code, and it is clear from the help command that it should be named send_signer_config.
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256d286 Minor formatting fix in help set command (tobtoht)
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8be5fea simplewallet: optional all flag to export_outputs/export_key_images (moneromooo-monero)
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a604241 simplewallet: don't ask about mining when running a command line (moneromooo-monero)
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This is likely to be done via a script
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8ccc30b Fix --restore-date usage (hyc)
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The wallet was ignoring --restore-height and --restore-date params and
prompting for them again.
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c820e18 simplewallet: print errors on exceptions creating wallets (moneromooo-monero)
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Exceptions would otherwise terminate the process silently
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f074b6b device: show address on device display (ph4r05)
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- Trezor: support for device address display (subaddress, integrated address)
- Wallet::API support added
- Simplewallet:
- address device [<index>]
- address new <label> // shows address on device also
- integrated_address [device] <payment_id|address> // new optional "device" arg to display also on the device
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a23dbe6 simplewallet: prompt when spending more than one old out in one tx (moneromooo-monero)
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also add a note when receiving the tx, because the user
might not notice the "XXX blocks to unlock" in the balance.
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588e6700 simplewallet: fix output representation offset (moneromooo-monero)
35e0a968 wallet2: "output lineup" fake out selection (moneromooo-monero)
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