Difference between revisions of "HowTo run PoP Miner"

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−
See: [[Main_Page]], [[PoP_Miner_CommandLine]], [[PoP_Transaction_LifeCycle]]
+
See: [[Main_Page]], [[PoP_Miner_CommandLine]], [[PoP_Transaction_LifeCycle]], [[PoP_Miner_Rewards]], [[PoP_Reward_Summary]]
 +
 
 +
__TOC__
 +
 
 +
== Updates to PoP for 0.3.8 ==
 +
 
 +
'''IMPORTANT! Bitcoin fee configuration changes from Fee per ''byte'' to Fee per ''kilobyte''.''' The configuration property in the nc-pop.properties file has changed from ''bitcoin.fee.perbyte'' to '''bitcoin.fee.perkb'''. The configuration value should be 1000 times the previous per byte fee (Bitcoin 1 KB = 1000 Bytes).
 +
 
 +
The rationale for this decision is that if we assume a normal PoP transaction has a size of ~285 bytes, a +1 increase in the fee per byte results in a 285 Satoshi increase in the final fee (+1 satoshi per byte * 285 bytes). Whereas a +1 increase in the fee per kilobyte results in a "0.285 Satoshi" increase in the final fee (+1 satoshi per kb * 0.285 kb). The net effect is a '''much''' finer granularity of control over the final fee.
 +
 
 +
Additional changes:
 +
* The minimum transaction fee per kb of 1000 Satoshis / KB can be disabled by setting the configuration value '''bitcoin.minrelayfee.enabled=false'''. This should be used with extreme caution as it is possible transactions below this threshold are ignored by the Bitcoin network.
 +
* The "change" address used in a PoP transaction will now be reused. Given the high volume of transactions we've seen from PoP miners, importing wallets was becoming prohibitive due to the large number of items (address keys) present in the filter.
 +
 
 +
== Updates to PoP for High Noon ==
 +
 
 +
See: [[Mining_High_Noon#PoP_Miner_Update_for_High_Noon]]
 +
 
 +
<pre>
 +
1. The PoP Miner requires BTC for Bitcoin MainNet (not tBTC)
 +
2. It is recommended for a single PoP Miner to at most PoP once per 10 minutes
 +
</pre>
  
 
__TOC__
 
__TOC__
Line 6: Line 27:
 
== Overview ==
 
== Overview ==
  
−
Proof-of-Proof (PoP) mining is what ultimately endorses the VeriBlock blockchain using Bitcoin's OP_RETURN, and thereby allows an altchain to have Bitcoin-level security through VeriBlock. It is different than Proof-of-Work mining, which collects valid transactions into a block and adds that block to the blockchain.
+
Proof-of-Proof (PoP) mining is what ultimately creates the payload to put in Bitcoin's OP_RETURN, and thereby allows an altchain to have Bitcoin-level security through VeriBlock. It is different than Proof-of-Work mining, which collects valid transactions into a block and adds that block to the blockchain.
  
 
== Prerequisites ==
 
== Prerequisites ==
  
−
PoP Mining requires Bitcoin accessibility.  
+
* Send Bitcoins to your local PoP Miner's Bitcoin wallet
 +
* Run local NodeCore instance
 +
 
 +
==Run the PoP Miner==
 +
 
 +
Successful PoP Mining will look something like so:
 +
 
 +
Initially load everything:
 +
 
 +
[[File:PoP_mine_1.png|600px]]
 +
 
 +
Run the "mine" command:
 +
 
 +
[[File:PoP_mine_2.png|600px]]
 +
 
 +
=== Setup ===
 +
 
 +
Note: If you are having trouble running nodecore-pop on Linux, you may need to make nodecore-pop executable: chmod a+x nodecore-pop
  
−
For Testnet, that means just running a testnet Bitcoin node.
+
Run a local instance of NodeCore
  
−
See this Bitcoin page for background info: https://en.bitcoin.it/wiki/Running_Bitcoin
+
Unzip nodecore-pop-*.zip
 +
In the bin folder, if you're using Windows then run nodecore-pop.bat, if you're using Linux or macOS then run nodecore-pop
  
−
# Download Bitcoin Core https://bitcoin.org/en/download, run Bitcoin in testnet mode, and allow it to fully sync. This may take a while depending on your network connection.
+
Wait a few seconds for the PoP Miner to start up. You should see something like:
−
# Run bitcoin TestNet by passing in the testnet parameter:
 
−
## Windows: bitcoin-qt.exe -testnet
 
−
## Linux: bitcoind -testnet
 
−
# Set up a rpc user and password in the bitcoin.conf file
 
−
# In Bitcoin Core, goto: Settings > Options > Main (tab) > Open Config File (button).
 
−
## [[File:HowTo_PoP_1a.png|400px]]
 
−
# specify the flags like below (server=1, rpcuser=your_username, rpcpassword=your_password), and save the file. Re-click the "Open Config File" to ensure the settings did indeed save (they should have)
 
−
# If prompted with "The configuration file is used to...", then click ok.
 
−
bitcoin.conf (a plaintext file) will open.
 
  
 
<pre>
 
<pre>
−
server=1
+
===[ NodeCore Proof-of-Proof Miner v0.1.3 ]===
−
rpcuser=bitcoinrpc
+
 
−
rpcpassword=someTestNetPassword123
+
INFO: Connecting to NodeCore at 127.0.0.1:10501
 +
WARN: PoP Miner: NOT READY (Could not connect to NodeCore)
 +
WARN: PoP Miner: NOT READY (Bitcoin blockchain is not downloaded)
 +
WARN: PoP Miner: NOT READY (Bitcoin service is not ready)
 +
SUCCESS: Bitcoin blockchain finished downloading
 +
INFO: Wallet loaded, current balance: 0.0 BTC
 +
INFO: Send coins to: mit5BbeUcper58ozwbMJCxs9hWAZfRKcWk
 +
SUCCESS: Bitcoin service is ready
 +
SUCCESS: PoP Miner: READY
 +
>
 
</pre>
 
</pre>
  
−
Get Bitcoin testnet coins from a faucet. Running PoP on VeriBlock testnet requires a small amount of testnet Bitcoin. You can find a list of popular Bitcoin testnet faucets here: https://en.bitcoin.it/wiki/Testnet#Faucets. Get a new Bitcoin testnet address from your running instance of Bitcoin, and then enter it into one of the Bitcoin testnet faucet sites to receive testnet Bitcoin coins.
+
Type "help" to see a list of all available commands:
  
−
==Run the PoP Miner==
+
<pre>
 +
> help
 +
 
 +
Commands:
 +
    getoperation <id>
 +
    getpopendorsementinfo <address>
 +
    help [command]
 +
    listconfig
 +
    listoperations
 +
    mine
 +
    quit
 +
    resubmit <id>
 +
    sendbitcointoaddress <address> <amount>
 +
    setconfig <key> <value>
 +
    showbitcoinaddress
 +
    showbitcoinbalance
 +
</pre>
 +
 
 +
Currently during the "High Noon" Phase (Starting Sept 13, 2018...), the PoP Miner mines to BTC MainNet, and requires BTC.
 +
 
 +
Before mining, you should be able to run showbitcoinbalance and see a positive balance
 +
<pre>
 +
> showbitcoinbalance
 +
Bitcoin Balance: 0.049292 BTC
 +
</pre>
 +
 
 +
=== Mine ===
 +
 
 +
Simply run the "mine" command
 +
 
 +
<pre>
 +
> mine
 +
2018-04-18 12:29:22.215 [15dabd68] Mining operation is now: STARTED
 +
2018-04-18 12:29:22.219 [15dabd68] Mining operation current action: Ready
 +
2018-04-18 12:29:22.221 [15dabd68] Mining operation is now: RUNNING
 +
 
 +
*** COMMAND RESULT ***
 +
* INFO: [V201] Mining operation started
 +
* To view details, run command: getoperation 15dabd68
 +
**********************
 +
 
 +
2018-04-18 12:29:22.226 [15dabd68] Mining operation current action: Getting PoP publication data
 +
2018-04-18 12:29:22.239 [15dabd68] Received PoP mining instructions, publishing data: 00000001000000035D489E6E78F3C759BDDE71EEFB20D97A58A616B1187B6C2B666B827A2C53DCF3B766520B169C3AD22AC941C65AD77B46044AE83955448F00217C8C3562659235A15C85F155CA620C
 +
2018-04-18 12:29:22.242 [15dabd68] Mining operation current action: Creating Bitcoin transaction containing PoP publication data
 +
INFO: Received tx '9fb8d3f61826031749e89b6e0b940cf3a265a247691c4399ee5951d3945f15d4', new balance: '0.048938 BTC'
 +
2018-04-18 12:29:23.937 [15dabd68] Signed Bitcoin transaction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
 +
2018-04-18 12:29:23.938 [15dabd68] Submitted Bitcoin transaction: 9fb8d3f61826031749e89b6e0b940cf3a265a247691c4399ee5951d3945f15d4
 +
2018-04-18 12:29:23.940 [15dabd68] Mining operation current action: Waiting for transaction to be included in Bitcoin block
 +
>
 +
</pre>
 +
 
 +
This will show:
 +
* Bitcoin transaction (can see this on a block explorer, such as: https://www.blocktrail.com/tBTC/tx/9fb8d3f61826031749e89b6e0b940cf3a265a247691c4399ee5951d3945f15d4)
 +
* The 80-byte PoP Payload that will be put in the OP_RETURN
 +
 
 +
There can be multiple PoP Transactions at once, therefore each is given an in-session identifier, in this case "[15dabd68]". This is a temporary session ID. Ultimately the PoP Transaction will be on the VBK blockchain, and have a VBK Transaction ID.
 +
 
 +
=== View Status of Mining ===
 +
 
 +
While PoP Mining is very quick to start, it does take several confirmations on the BTC blockchain, and 500 confirmations on the VBK blockchain for payout. You can run getoperation on a session ID to see its current status:
 +
 
 +
<pre>
 +
> getoperation 15dabd68
 +
 
 +
PoP Mining Operation: 15dabd68
 +
    Status: RUNNING
 +
    Current Action: CONFIRM
 +
    PoP Publication Data: 00000001000000035D489E6E78F3C759BDDE71EEFB20D97A58A616B1187B6C2B666B827A2C53DCF3B766520B169C3AD22AC941C65AD77B46044AE83955448F00217C8C3562659235A15C85F155CA620C
 +
    Transaction: 0100000001CFFE10EBBF7B9C30372DE738B845BFEDD533B13324ABC6E2AEFA1C79089A810E010000006A4730440220754348272F33F380D34A3E82D2005752AD6BE672EFD070AF830DD2A162D64FD00220279DFCF6849DD1712793A96B3EA0A03B0C206B58BD8B15D12DF55DE425B039CB012103086A1756BA928FE5644BE7ED595C37A72D4BD6E09A518CCA9A9A80165C351E9DFFFFFFFF0268AC4A00000000001976A914EACAE5B5B6643640FD906791F511694E0BA9AF3088AC0000000000000000536A4C5000000001000000035D489E6E78F3C759BDDE71EEFB20D97A58A616B1187B6C2B666B827A2C53DCF3B766520B169C3AD22AC941C65AD77B46044AE83955448F00217C8C3562659235A15C85F155CA620C00000000
 +
    Transaction ID: 9fb8d3f61826031749e89b6e0b940cf3a265a247691c4399ee5951d3945f15d4
 +
    Block Header of Proof: 00000020D22D248064ECA9D9717DDF2C532CD3681E10B1F97462FC7A6101000000000000B3503C8DF213CC4AE02D0C96D5101DBFA85C0C7A950F1684D97DB9296F3A8C65AB80D75AFFFF001D6295F16F
 +
    Context Headers:
 +
        000000205D98FA5CE3BB7F40BDC6B74C3A3A0334EC29F4B7FB9850882A14CF9900000000FE7CB67E7E84491F9B2C9BDD08731343EBDE6E1B08E64E18265A70D55FB4F7DCF47BD75A9B03031A171C327000
 +
    Merkle Path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
 +
    Alternate Blocks:
 +
>
 +
 
 +
</pre>
 +
 
 +
== PoP Mining Lifecycle ==
 +
 
 +
Current Actions
 +
 
 +
The WAIT and CONFIRM may take a while. Other steps should be fast.
 +
 
 +
Once the PoP Miner is done, there is nothing more for it to do, check [[HowTo_run_PoP_Miner#viewrecentrewards]] to see about rewards.
 +
 
 +
{| class="wikitable"
 +
! Action
 +
! Duration
 +
! Description
 +
|-
 +
| READY
 +
|
 +
| Operation has been initialized and is ready to start
 +
|-
 +
| PUBLICATION_DATA
 +
|
 +
| Getting the publication data from NodeCore
 +
|-
 +
| TRANSACTION
 +
|
 +
| Composing and submitting the Bitcoin transaction containing the PoP publication data
 +
|-
 +
| WAIT
 +
| "a while"
 +
| Waiting and listening for new Bitcoin blocks that include the transaction
 +
|-
 +
| PROOF
 +
|
 +
| Validating the merkle path of the transaction in the block
 +
|-
 +
| CONTEXT
 +
|
 +
| Accumulating Bitcoin block headers to provide enough context to NodeCore to maintain an unbroken SPV view of the Bitcoin blockchain
 +
|-
 +
| SUBMIT
 +
|
 +
| Submitting all required proofs of the Bitcoin transaction to NodeCore (NodeCore adds a PoP transaction to mempool)
 +
|-
 +
| CONFIRM
 +
| maybe several hours
 +
| Waiting and listening for new Bitcoin blocks and transaction to confirm 20 times. Handles resubmission of PoP transaction to NodeCore if the Bitcoin blockchain should fork and previous block is no longer in the main branch.
 +
|-
 +
| DONE
 +
|
 +
| Done with mining. Check [[HowTo_run_PoP_Miner#viewrecentrewards]] for upcoming rewards
 +
|}
 +
 
 +
 
 +
Expect this kind of flow in the log:
 +
 
 +
Note the the PoP Id (2aaef35f) given to each step.
 +
 
 +
<pre>
 +
Expect this flow:
 +
[2aaef35f] Mining operation current action: Waiting for transaction to be included in Bitcoin block
 +
[2aaef35f] Transaction seen in block
 +
[2aaef35f] Setting block header of proof
 +
[2aaef35f] Found transaction in Bitcoin block with header:
 +
[2aaef35f] Mining operation current action: Proving transaction included in Bitcoin block
 +
[2aaef35f] Found Merkle path to transaction:
 +
[2aaef35f] Mining operation current action: Building Bitcoin context
 +
[2aaef35f] Added 3 context headers
 +
...
 +
[2aaef35f] Mining operation current action: Submitting completed PoP transaction
 +
[2aaef35f] Submitted PoP transaction: B9BC44D4E77CD5EE1E6B05B8154453EB436CC516C1DC9B9D3E22208AA2E3BC2E
 +
[2aaef35f] Mining operation current action: Confirming Bitcoin transaction
 +
[2aaef35f] New block added, checking confidence
 +
[2aaef35f] Mining operation current action: Done
 +
[2aaef35f] Mining operation is now: COMPLETE
 +
</pre>
 +
 
 +
== Reference ==
 +
 
 +
=== VeriBlock "Rounds" ===
 +
 
 +
VeriBlock blocks are classified as belonging to one of four rounds. The pattern of rounds repeats every 20 blocks (ending with a block whose number is divisible by 20, e.g. blocks 65461-65480 is a set and 65481-65500 is the next set).  The round classification within each 20 block set is illustrated below:
 +
 
 +
[[File:rounds.png|1000px]]
 +
 
 +
Each set of 20 contains just one Round 4 block, the last block, and is known as a "keystone".
 +
 
 +
=== ncpop.properties Reference ===
 +
 
 +
These properties can be set in the ncpop.properties file (in bin folder, located next to nodecore-pop.bat). If this file does not exist, it will be created the first time the miner is run.
 +
 
 +
These can also be seen from running the "listconfig" command, and set with the "setconfig" command.
 +
 
 +
{| class="wikitable"
 +
! Config Key
 +
! Default Value
 +
! Comment
 +
|-
 +
| bitcoin.network
 +
| mainnet
 +
|
 +
|-
 +
| bitcoin.fee.max
 +
| 8000
 +
| The maximum transaction fee for any given Bitcoin transaction
 +
|-
 +
| bitcoin.fee.perkb
 +
| 20000
 +
| The Bitcoin transaction fee per kilobyte (1000 bytes)
 +
|-
 +
| nodecore.rpc.host
 +
| 127.0.0.1
 +
|
 +
|-
 +
| nodecore.rpc.port
 +
| 10501
 +
|
 +
|-
 +
| nodecore.rpc.ssl
 +
| false
 +
|
 +
|-
 +
| nodecore.rpc.password
 +
|
 +
|
 +
|-
 +
| nodecore.rpc.cert.chain.path
 +
|
 +
|
 +
|-
 +
| pop.cron.schedule
 +
|
 +
| A schedule on which to mine, see below for further information
 +
|-
 +
| auto.mine.round1
 +
| false
 +
| Automatically mine whenever a new "Round 1" block is seen by NodeCore
 +
|-
 +
| auto.mine.round2
 +
| false
 +
| Automatically mine whenever a new "Round 2" block is seen by NodeCore
 +
|-
 +
| auto.mine.round3
 +
| false
 +
| Automatically mine whenever a new "Round 3" block is seen by NodeCore
 +
|-
 +
| auto.mine.round4
 +
| false
 +
| Automatically mine whenever a new "Round 4" block is seen by NodeCore
 +
|}
 +
 
 +
'''WARNING:''' It is not recommended to configure both the ''pop.cron.schedule'' and the ''auto.mine.roundN'' properties as it can result in too many unconfirmed transactions chained together.
 +
 
 +
==== PoP Cron Scheduler ====
 +
 
 +
Cron expressions are a compact format for expressing a recurring schedule. For help constructing an expression, visit an online tool, such as http://www.cronmaker.com/.
 +
An example schedule that would trigger a mine operation at :00 and :30 minutes every hour is below:
 +
 
 +
<pre>
 +
pop.cron.schedule=0 0/30 * * * ?
 +
</pre>
 +
 
 +
=== PoP Application Status Codes ===
 +
 
 +
Status of the PoP Miner
 +
 
 +
{| class="wikitable"
 +
! Status
 +
! Description
 +
|-
 +
| STARTED
 +
|
 +
|-
 +
| RUNNING
 +
| Will most often see this state
 +
|-
 +
| COMPLETE
 +
|
 +
|-
 +
| FAILED
 +
|
 +
|}
 +
 
 +
 
 +
=== PoP Files ===
 +
 
 +
These are files within the \bin folder:
 +
 
 +
* bitcoinj.nodecore-pop.log - log file for BitcoinJ
 +
* bitcoin-pop-testnet.spvchain
 +
* bitcoin-pop-testnet.wallet --> Bitcoin wallet, this contains your BTC!
 +
* ncpop.properties
 +
* nodecore-pop --> start PoP Miner on linux
 +
* nodecore-pop.bat --> start PoP Miner on windows
 +
* veriblock.nodecore-pop.log --> log file for PoP. If you have errors with PoP mining, keep this file for troubleshooting
 +
 
 +
== FAQ ==
 +
 
 +
=== Does the PoP Miner require BTC or tBTC? ===
 +
 
 +
BTC.
 +
 
 +
Previously the TestNet PoP Miner required tBTC (testnet BTC) during the "Mining Sunrise" phase.
 +
 
 +
After VBK MainNet launch, the VBK TestNet PoP Miner will again use BTC TestNet (tBTC), and the VBK MainNet PoP Miner will use BTC.
 +
 
 +
=== How can I see my PoP rewards? ===
 +
 
 +
See: [[PoP_Miner_Rewards]]
 +
 
 +
=== Do I need to run a full Bitcoin node? ===
 +
No. The PoP Miner uses the BitcoinJ library and embeds a bitcoin wallet, such that one does NOT need to run a full node to do PoP Mining.
 +
 
 +
=== Does the Bitcoin I send to my PoP Wallet need to be confirmed? ===
 +
No. If the Bitcoin transaction with the deposit ends up being reverted, then the PoP transaction that depends on it just fails.
 +
 
 +
This also has the benefit of allowing PoP Mining immediately after a BTC deposit, without waiting for several confirmations.
 +
 
 +
=== How do I set the BTC transaction fee? ===
 +
 
 +
For "what should the BTC fee be", check: [[PoP_Miner_Rewards#What_should_the_tBTC_Tx_fee_be.3F]]. This section explains how to set the fee.
 +
 
 +
Either set it in the ncpop.properties file:
  
−
Note: If you are having trouble running nodecore-pop on linux, you may need to make nodecore-pop executable: chmod a+x nodecore-pop
+
<pre>
 +
bitcoin.fee.max=8000
 +
bitcoin.fee.perkb=20000
 +
</pre>
  
−
Run a local instance of NodeCore
+
Or set it via the 'setconfig' command:
  
−
Unzip nodecore-pop-*.zip
+
<pre>
−
In the bin folder, if Windows then run nodecore-pop.bat, if linux then run nodecore-pop
+
setconfig bitcoin.fee.perbyte 20000
−
You will be prompted for a series of questions. Below is sample inputs. Note that Bitcoin TestNet port is 18332 (not 18333).
+
setconfig bitcoin.fee.max 8000
 +
</pre>
 +
 
 +
Note: Make sure to also set 'bitcoin.fee.max'. This is the absolute maximum you're willing to allow the final transaction fee to be. An average transaction may be around 300 bytes (or, 0.3 KB), so, generally the configured maximum should be at least (0.3 KB x ''bitcoin.fee.perkb'').
  
−
One prompt will be for a "funded Bitcoin address." This can be retrieved by running "listunspent" from the built-in console. To get to the built-in consile, go to: Help > Debug > Console Tab:
+
You can see the current fee by running the 'listconfig' command ([[HowTo_run_PoP_Miner#listconfig]])
  
−
[[File:HowTo_PoP_4.png|400px]]
+
=== How to set up a cron schedule for mining ===
  
−
At this point, you should have:
+
Properties file is:
−
* An instance of NodeCore running, such as one available at 127.0.0.1:10500
 
−
* A Bitcoin testnet node, such as on available at 127.0.0.1:18332
 
−
* That Bitcoin testnet node has an RPC username and password set up in its bitcoin.conf file
 
−
* A funded Bitcoin address (first get testnet Bitcoin coins from a faucet, then run listunspent to get an address), such as "mwAY47kNhN2TY1nc23Y18aDi4botjpGzAy"
 
  
 
<pre>
 
<pre>
 +
pop.cron.schedule=0 0/30 * * * ?
 +
</pre>
  
−
Please enter the VeriBlock NodeCore host [Default: 127.0.0.1](]):
+
Checkout http://www.cronmaker.com/ for help building the expression
−
> 127.0.0.1
 
−
Please enter the VeriBlock NodeCore port [10500](Default:):
 
−
> 10500
 
−
Please enter the Bitcoin RPC host [127.0.0.1](Default:):
 
−
> 127.0.0.1
 
−
Please enter the Bitcoin RPC port [8332](Default:):
 
−
> 18332
 
−
Please enter a funded Bitcoin address you would like to use for PoP:
 
−
> mwAY47kNhN2TY1nc23Y18aDi4botjpGzAy
 
−
Please enter your Bitcoin RPC username:
 
−
> bitcoinrpc
 
−
Please enter your Bitcoin RPC password:
 
−
> someTestNetPassword123
 
−
How many BTC would you like to pay as a transaction fee for each PoP? (Suggested: 0.001)
 
−
> 0.001
 
  
 +
=== How to auto-mine every Nth round? ===
 +
 +
The PoP Miner can mine every Nth round. See: [[HowTo_run_PoP_Miner#VeriBlock_.22Rounds.22]]
 +
 +
Within a 20 block window:
 +
 +
* round4 = every 20th block, i.e. keystone (highest reward)
 +
* round1 = 1,4,7,10,13,16,19
 +
* round2 = 2,5,8,11,14,17
 +
* round3 = 3,6,9,12,15,18
 +
 +
Set the ncpop.properties file:
 +
 +
<pre>
 +
auto.mine.round4=true
 
</pre>
 
</pre>
  
−
''Note that after entering this info once, it will be saved to a ncpop.properties file for future reference. If you ever need to change these entries in the future, you can either delete ncpop.properties and restart nodecore-pop (where it will prompt you for new entries), or you can change the entires in the configuration file directly.''
+
Note if you wanted different fees for different rounds, you could have multiple miners run. Miner A could run rounds 1-3 at Fee X, Miner B could run round 4 at fee Y.
 +
 
 +
Note, it is advised to not use this and the cron expression - pick one or the other.
  
−
Because PoP Mining costs a small amount of BTC, you will be prompted for each transaction with something like: "'''Press enter to pay 0.001 BTC to perform a PoP! (q to quit)'''"
+
=== Can I run multiple PoP Miners? ===
  
−
A Proof of Proof mining operation is a long running process. It involves retrieving a PoP signature from NodeCore, submitting a Bitcoin transaction, waiting for the Bitcoin transaction to be included in a block, and finally submitting that Bitcoin block information back to NodeCore. Until that final submission to NodeCore takes place, the mining operation is incomplete, and you will not be rewarded for your PoP mining efforts.  
+
For most people you should not need to. Whereas a PoW Miner (either GPU or CPU) is limited by Hardware and processing power and electricity - i.e. run 10 PoW miners for 10x more likely chance of getting a reward - a PoP miner is limited by BTC for the transaction fee.
  
−
The console output updates with each new stage of the mining operation.  Because it is possible to have multiple concurrent mining operations executing, each status update written to the console includes a "job identifier", that will look like [4826f210]. This job identifier can be used to correlate status messages for any given mining operation.  By far, the longest single task in the mining operation is waiting for a Bitcoin transaction to be included in a mined Bitcoin block. It is very common and normal to see many status message written very rapidly as soon as you initiate a new operation and then for the miner to seemingly "pause" with the latest message reading:
+
It will be easier for someone to manage a single instance of the PoP miner, but mine more frequently by constantly feeding it BTC for the TX fees.
  
−
<pre>2018-04-02 00:15:00.052 [4826f210] Mining operation current action: Waiting for transaction to be included in Bitcoin block</pre>
+
BUT... if you do want to run multiple instances:  
  
−
If a reasonable transaction fee was used to submit your Bitcoin transaction, it will eventually be included in a block, and the PoP miner will progress through the final stages of the operation. You will know an operation is complete when you see console output:
+
* Option A: You'll need to put them in separate folders on the machine and use different BitcoinJ wallets. '''Do not run the multiple instances of the same executable with the same wallet'''. Each copy will have it's own set of files: [[HowTo_run_PoP_Miner#PoP_Files]]
 +
* Option B: You can also run multiple instances on different machines, all pointed to the same remote NodeCore instance by setting the ncpop.properties 'nodecore.rpc.host=<remote_IP_Here>' (also see [[https://wiki.veriblock.org/index.php?title=NodeCore_Networking]] to set up NodeCore to accept connections from the remote PoP miner)
  
−
<pre>2018-04-02 00:18:27.315 [4826f210] Mining operation is now: Completed</pre>
+
=== Can I import a previous BTC wallet? ===
  
−
At any point in the process, you may queue up another PoP mining operation by hitting the "ENTER" key.  You also may quit the application at any time by pressing "q" followed by the "ENTER" key. The quit sequence waits for all in-progress mining operations to complete before actually shutting down the application. This is to ensure that your PoP transaction is submitted and you have every opportunity to be rewarded for the Bitcoin you've spent to begin the operation. You will see status updates written to the console as it's attempting to finalize running operations:
+
Yes, just copy bin\bitcoin-pop-*.wallet.
  
−
<pre>Waiting on operation '2a479b68' at action: Waiting for transaction to be included in Bitcoin block
+
This will carry over the BTC balance.
−
Waiting on 1 operations to complete</pre>
 
  
−
Congrats, you have mined a PoP transaction!
+
== Troubleshooting ==
  
−
== View PoP on the bitcoin blockchain ==
+
=== "PoP Miner not ready" warning ===
  
−
Go back to your Bitcoin Core wallet, Transactions tab, and you will see PoP Transactions. Drill down on a transaction and you'll see a transaction ID.  
+
{| class="wikitable"
 +
! Warning
 +
! Solution
 +
|-
 +
| PoP wallet does not contain sufficient funds
 +
| Send Bitcoins to your PoP BTC wallet address. Run commands showbitcoinbalance (it should be greater than zero), and sendbitcointoaddress.
 +
|-
 +
| Could not connect to NodeCore
 +
| Ensure an instance of NodeCore is running, and you could connect to it from the NC_CLI and run getinfo
 +
|-
 +
| Bitcoin blockchain is not downloaded
 +
| Ensure the ncpop.properties file has a line for bitcoin.network=testnet, and wait for the blockchain to download. There should be a message like "Blockchain downloading: 95%".
 +
|-
 +
| Bitcoin service is not ready
 +
| Check the other warnings. There should be a message like "SUCCESS: Bitcoin service is ready".
 +
|}
  
−
[[File:HowTo_PoP_2c.png|400px]]
+
=== I do not have any bitcoin ===
  
−
After a few minutes, this transaction ID should show up on Bitcoin testnet block explorers, such as http://testnet.coinsecrets.org.
+
For mainnet, acquire Bitcoin via normal means.
 +
 
 +
For testnet, use a faucet to get test bitcoin. You can find a list of popular Bitcoin testnet faucets here: https://en.bitcoin.it/wiki/Testnet#Faucets.
 +
 
 +
=== Mining operation action took longer than expected. Operation can be resubmitted. ===
 +
 
 +
If you get an error, then try running the resubmit command: [[PoP_Miner_CommandLine#resubmit]]
  
 
<pre>
 
<pre>
−
Status: 0/unconfirmed, in memory pool
+
ERROR: Mining operation action took longer than expected. Operation can be resubmitted.
−
Date: 3/9/2018 14:33
 
−
Debit: 0.00000000 BTC
 
−
Transaction fee: -0.00100000 BTC
 
−
Net amount: -0.00100000 BTC
 
−
Transaction ID: 52bac8bad5c9d71f1adcf166c5ef5e651f269851b1816b61cb99ed62268f512b
 
−
Transaction total size: 283 bytes
 
−
Output index: 0
 
 
</pre>
 
</pre>
−
Drill down on the block explorer, and you will see the proof in the OP_RETURN. Ignore the first 4 characters (0x4c refers to the OP_PUSHDATA1 opcode, and 0x50 refers to 80 bytes [the size of our published data] being pushed onto the stack), look at the last 160 (80 bytes), and that is your pop publication on the BTC testnet!
+
 
 +
PoP Transaction must complete within a certain period of time to remain relevant, and hence it times out. For example, if there's an abnormally high amount of context headers, that may cause a timeout.
 +
 
 +
===Why does the BTC address change each time I run the showAddress command?===
 +
 
 +
Bitcoin addresses are just a representation of the public key from a public/private key pair. We generate new key pairs every time you run the `showAddress` command. The PoP Miner manages these addresses for you, so you don't have to worry about them. As a privacy best practice, it's best to always use a new address (key pair) every time you receive a payment. The reason the PoP miner (or any Bitcoin wallet) generates a new address each time you receive a payment is for privacy reasons only, because if you use the same address for many transactions, the peers you traded with will be able to identify which other transactions you were involved in, and your identity will be easier to tie to the address. [Credit: A sentence or two for this answer may come from an unknown tech source]
 +
 
 +
 
 +
=== Failed to get PoP publication data from NodeCore ===
 +
 
 +
This kind of error implies that NodeCore is not ready.
 +
 
 +
Try to connect to the NC instance with the NC_CLI and run getinfo:
  
 
<pre>
 
<pre>
−
OP_RETURN
+
Failed to get PoP publication data from NodeCore: Status{code=DEADLINE_EXCEEDED, description=deadline exceeded after 14999412514ns, cause=null}
−
4c5000000001000000f29717032fb910956d001e9ae5554540864b4c998cf7233ca3ff78109365086b0e7ad55c480ce9dd55fa6763275aa2eedc0319ca1c
 
 
</pre>
 
</pre>
  
−
https://www.blocktrail.com/tBTC/tx/52bac8bad5c9d71f1adcf166c5ef5e651f269851b1816b61cb99ed62268f512b
+
Can you run NC_CLI getinfo?
 +
 
 +
* Yes --> Then try to repeat the PoP miner operation.
 +
* No --> Troubleshoot NodeCore [[HowTo_run_NodeCore]]
  
−
[[File:HowTo_PoP_3.png|400px]]
+
== Command Line Reference ==
 +
See: [[PoP_Miner_CommandLine]]

Revision as of 16:37, 6 November 2018

See: Main_Page, PoP_Miner_CommandLine, PoP_Transaction_LifeCycle, PoP_Miner_Rewards, PoP_Reward_Summary

Updates to PoP for 0.3.8

IMPORTANT! Bitcoin fee configuration changes from Fee per byte to Fee per kilobyte. The configuration property in the nc-pop.properties file has changed from bitcoin.fee.perbyte to bitcoin.fee.perkb. The configuration value should be 1000 times the previous per byte fee (Bitcoin 1 KB = 1000 Bytes).

The rationale for this decision is that if we assume a normal PoP transaction has a size of ~285 bytes, a +1 increase in the fee per byte results in a 285 Satoshi increase in the final fee (+1 satoshi per byte * 285 bytes). Whereas a +1 increase in the fee per kilobyte results in a "0.285 Satoshi" increase in the final fee (+1 satoshi per kb * 0.285 kb). The net effect is a much finer granularity of control over the final fee.

Additional changes:

  • The minimum transaction fee per kb of 1000 Satoshis / KB can be disabled by setting the configuration value bitcoin.minrelayfee.enabled=false. This should be used with extreme caution as it is possible transactions below this threshold are ignored by the Bitcoin network.
  • The "change" address used in a PoP transaction will now be reused. Given the high volume of transactions we've seen from PoP miners, importing wallets was becoming prohibitive due to the large number of items (address keys) present in the filter.

Updates to PoP for High Noon

See: Mining_High_Noon#PoP_Miner_Update_for_High_Noon 

1. The PoP Miner requires BTC for Bitcoin MainNet (not tBTC)
2. It is recommended for a single PoP Miner to at most PoP once per 10 minutes


Overview

Proof-of-Proof (PoP) mining is what ultimately creates the payload to put in Bitcoin's OP_RETURN, and thereby allows an altchain to have Bitcoin-level security through VeriBlock. It is different than Proof-of-Work mining, which collects valid transactions into a block and adds that block to the blockchain.

Prerequisites

  • Send Bitcoins to your local PoP Miner's Bitcoin wallet
  • Run local NodeCore instance

Run the PoP Miner

Successful PoP Mining will look something like so:

Initially load everything:

PoP mine 1.png

Run the "mine" command:

PoP mine 2.png

Setup

Note: If you are having trouble running nodecore-pop on Linux, you may need to make nodecore-pop executable: chmod a+x nodecore-pop

Run a local instance of NodeCore

Unzip nodecore-pop-*.zip In the bin folder, if you're using Windows then run nodecore-pop.bat, if you're using Linux or macOS then run nodecore-pop

Wait a few seconds for the PoP Miner to start up. You should see something like: 

===[ NodeCore Proof-of-Proof Miner v0.1.3 ]===

INFO: Connecting to NodeCore at 127.0.0.1:10501
WARN: PoP Miner: NOT READY (Could not connect to NodeCore)
WARN: PoP Miner: NOT READY (Bitcoin blockchain is not downloaded)
WARN: PoP Miner: NOT READY (Bitcoin service is not ready)
SUCCESS: Bitcoin blockchain finished downloading
INFO: Wallet loaded, current balance: 0.0 BTC
INFO: Send coins to: mit5BbeUcper58ozwbMJCxs9hWAZfRKcWk
SUCCESS: Bitcoin service is ready
SUCCESS: PoP Miner: READY
 >

Type "help" to see a list of all available commands: 

 > help

Commands:
    getoperation <id>
    getpopendorsementinfo <address>
    help [command]
    listconfig
    listoperations
    mine
    quit
    resubmit <id>
    sendbitcointoaddress <address> <amount>
    setconfig <key> <value>
    showbitcoinaddress
    showbitcoinbalance

Currently during the "High Noon" Phase (Starting Sept 13, 2018...), the PoP Miner mines to BTC MainNet, and requires BTC.

Before mining, you should be able to run showbitcoinbalance and see a positive balance 

 > showbitcoinbalance
Bitcoin Balance: 0.049292 BTC

Mine

Simply run the "mine" command 

 > mine
2018-04-18 12:29:22.215 [15dabd68] Mining operation is now: STARTED
2018-04-18 12:29:22.219 [15dabd68] Mining operation current action: Ready
2018-04-18 12:29:22.221 [15dabd68] Mining operation is now: RUNNING

*** COMMAND RESULT ***
* INFO: [V201] Mining operation started
* To view details, run command: getoperation 15dabd68
**********************

2018-04-18 12:29:22.226 [15dabd68] Mining operation current action: Getting PoP publication data
2018-04-18 12:29:22.239 [15dabd68] Received PoP mining instructions, publishing data: 00000001000000035D489E6E78F3C759BDDE71EEFB20D97A58A616B1187B6C2B666B827A2C53DCF3B766520B169C3AD22AC941C65AD77B46044AE83955448F00217C8C3562659235A15C85F155CA620C
2018-04-18 12:29:22.242 [15dabd68] Mining operation current action: Creating Bitcoin transaction containing PoP publication data
INFO: Received tx '9fb8d3f61826031749e89b6e0b940cf3a265a247691c4399ee5951d3945f15d4', new balance: '0.048938 BTC'
2018-04-18 12:29:23.937 [15dabd68] Signed Bitcoin transaction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
2018-04-18 12:29:23.938 [15dabd68] Submitted Bitcoin transaction: 9fb8d3f61826031749e89b6e0b940cf3a265a247691c4399ee5951d3945f15d4
2018-04-18 12:29:23.940 [15dabd68] Mining operation current action: Waiting for transaction to be included in Bitcoin block
 >

This will show:

There can be multiple PoP Transactions at once, therefore each is given an in-session identifier, in this case "[15dabd68]". This is a temporary session ID. Ultimately the PoP Transaction will be on the VBK blockchain, and have a VBK Transaction ID.

View Status of Mining

While PoP Mining is very quick to start, it does take several confirmations on the BTC blockchain, and 500 confirmations on the VBK blockchain for payout. You can run getoperation on a session ID to see its current status: 

 > getoperation 15dabd68

PoP Mining Operation: 15dabd68
    Status: RUNNING
    Current Action: CONFIRM
    PoP Publication Data: 00000001000000035D489E6E78F3C759BDDE71EEFB20D97A58A616B1187B6C2B666B827A2C53DCF3B766520B169C3AD22AC941C65AD77B46044AE83955448F00217C8C3562659235A15C85F155CA620C
    Transaction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
    Transaction ID: 9fb8d3f61826031749e89b6e0b940cf3a265a247691c4399ee5951d3945f15d4
    Block Header of Proof: 00000020D22D248064ECA9D9717DDF2C532CD3681E10B1F97462FC7A6101000000000000B3503C8DF213CC4AE02D0C96D5101DBFA85C0C7A950F1684D97DB9296F3A8C65AB80D75AFFFF001D6295F16F
    Context Headers:
        000000205D98FA5CE3BB7F40BDC6B74C3A3A0334EC29F4B7FB9850882A14CF9900000000FE7CB67E7E84491F9B2C9BDD08731343EBDE6E1B08E64E18265A70D55FB4F7DCF47BD75A9B03031A171C327000
    Merkle Path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
    Alternate Blocks:
 >

PoP Mining Lifecycle

Current Actions

The WAIT and CONFIRM may take a while. Other steps should be fast.

Once the PoP Miner is done, there is nothing more for it to do, check HowTo_run_PoP_Miner#viewrecentrewards to see about rewards.

Action Duration Description
READY Operation has been initialized and is ready to start
PUBLICATION_DATA Getting the publication data from NodeCore
TRANSACTION Composing and submitting the Bitcoin transaction containing the PoP publication data
WAIT "a while" Waiting and listening for new Bitcoin blocks that include the transaction
PROOF Validating the merkle path of the transaction in the block
CONTEXT Accumulating Bitcoin block headers to provide enough context to NodeCore to maintain an unbroken SPV view of the Bitcoin blockchain
SUBMIT Submitting all required proofs of the Bitcoin transaction to NodeCore (NodeCore adds a PoP transaction to mempool)
CONFIRM maybe several hours Waiting and listening for new Bitcoin blocks and transaction to confirm 20 times. Handles resubmission of PoP transaction to NodeCore if the Bitcoin blockchain should fork and previous block is no longer in the main branch.
DONE Done with mining. Check HowTo_run_PoP_Miner#viewrecentrewards for upcoming rewards


Expect this kind of flow in the log:

Note the the PoP Id (2aaef35f) given to each step. 

Expect this flow:
[2aaef35f] Mining operation current action: Waiting for transaction to be included in Bitcoin block
[2aaef35f] Transaction seen in block
[2aaef35f] Setting block header of proof
[2aaef35f] Found transaction in Bitcoin block with header: 
[2aaef35f] Mining operation current action: Proving transaction included in Bitcoin block
[2aaef35f] Found Merkle path to transaction: 
[2aaef35f] Mining operation current action: Building Bitcoin context
[2aaef35f] Added 3 context headers
...
[2aaef35f] Mining operation current action: Submitting completed PoP transaction
[2aaef35f] Submitted PoP transaction: B9BC44D4E77CD5EE1E6B05B8154453EB436CC516C1DC9B9D3E22208AA2E3BC2E
[2aaef35f] Mining operation current action: Confirming Bitcoin transaction
[2aaef35f] New block added, checking confidence
[2aaef35f] Mining operation current action: Done
[2aaef35f] Mining operation is now: COMPLETE

Reference

VeriBlock "Rounds"

VeriBlock blocks are classified as belonging to one of four rounds. The pattern of rounds repeats every 20 blocks (ending with a block whose number is divisible by 20, e.g. blocks 65461-65480 is a set and 65481-65500 is the next set). The round classification within each 20 block set is illustrated below:

Rounds.png

Each set of 20 contains just one Round 4 block, the last block, and is known as a "keystone".

ncpop.properties Reference

These properties can be set in the ncpop.properties file (in bin folder, located next to nodecore-pop.bat). If this file does not exist, it will be created the first time the miner is run.

These can also be seen from running the "listconfig" command, and set with the "setconfig" command.

Config Key Default Value Comment
bitcoin.network mainnet
bitcoin.fee.max 8000 The maximum transaction fee for any given Bitcoin transaction
bitcoin.fee.perkb 20000 The Bitcoin transaction fee per kilobyte (1000 bytes)
nodecore.rpc.host 127.0.0.1
nodecore.rpc.port 10501
nodecore.rpc.ssl false
nodecore.rpc.password
nodecore.rpc.cert.chain.path
pop.cron.schedule A schedule on which to mine, see below for further information
auto.mine.round1 false Automatically mine whenever a new "Round 1" block is seen by NodeCore
auto.mine.round2 false Automatically mine whenever a new "Round 2" block is seen by NodeCore
auto.mine.round3 false Automatically mine whenever a new "Round 3" block is seen by NodeCore
auto.mine.round4 false Automatically mine whenever a new "Round 4" block is seen by NodeCore

WARNING: It is not recommended to configure both the pop.cron.schedule and the auto.mine.roundN properties as it can result in too many unconfirmed transactions chained together.

PoP Cron Scheduler

Cron expressions are a compact format for expressing a recurring schedule. For help constructing an expression, visit an online tool, such as http://www.cronmaker.com/. An example schedule that would trigger a mine operation at :00 and :30 minutes every hour is below: 

pop.cron.schedule=0 0/30 * * * ?

PoP Application Status Codes

Status of the PoP Miner

Status Description
STARTED
RUNNING Will most often see this state
COMPLETE
FAILED


PoP Files

These are files within the \bin folder:

  • bitcoinj.nodecore-pop.log - log file for BitcoinJ
  • bitcoin-pop-testnet.spvchain
  • bitcoin-pop-testnet.wallet --> Bitcoin wallet, this contains your BTC!
  • ncpop.properties
  • nodecore-pop --> start PoP Miner on linux
  • nodecore-pop.bat --> start PoP Miner on windows
  • veriblock.nodecore-pop.log --> log file for PoP. If you have errors with PoP mining, keep this file for troubleshooting

FAQ

Does the PoP Miner require BTC or tBTC?

BTC.

Previously the TestNet PoP Miner required tBTC (testnet BTC) during the "Mining Sunrise" phase.

After VBK MainNet launch, the VBK TestNet PoP Miner will again use BTC TestNet (tBTC), and the VBK MainNet PoP Miner will use BTC.

How can I see my PoP rewards?

See: PoP_Miner_Rewards

Do I need to run a full Bitcoin node?

No. The PoP Miner uses the BitcoinJ library and embeds a bitcoin wallet, such that one does NOT need to run a full node to do PoP Mining.

Does the Bitcoin I send to my PoP Wallet need to be confirmed?

No. If the Bitcoin transaction with the deposit ends up being reverted, then the PoP transaction that depends on it just fails.

This also has the benefit of allowing PoP Mining immediately after a BTC deposit, without waiting for several confirmations.

How do I set the BTC transaction fee?

For "what should the BTC fee be", check: PoP_Miner_Rewards#What_should_the_tBTC_Tx_fee_be.3F. This section explains how to set the fee.

Either set it in the ncpop.properties file: 

bitcoin.fee.max=8000
bitcoin.fee.perkb=20000

Or set it via the 'setconfig' command: 

setconfig bitcoin.fee.perbyte 20000
setconfig bitcoin.fee.max 8000

Note: Make sure to also set 'bitcoin.fee.max'. This is the absolute maximum you're willing to allow the final transaction fee to be. An average transaction may be around 300 bytes (or, 0.3 KB), so, generally the configured maximum should be at least (0.3 KB x bitcoin.fee.perkb).

You can see the current fee by running the 'listconfig' command (HowTo_run_PoP_Miner#listconfig)

How to set up a cron schedule for mining

Properties file is: 

pop.cron.schedule=0 0/30 * * * ?

Checkout http://www.cronmaker.com/ for help building the expression

How to auto-mine every Nth round?

The PoP Miner can mine every Nth round. See: HowTo_run_PoP_Miner#VeriBlock_.22Rounds.22

Within a 20 block window:

  • round4 = every 20th block, i.e. keystone (highest reward)
  • round1 = 1,4,7,10,13,16,19
  • round2 = 2,5,8,11,14,17
  • round3 = 3,6,9,12,15,18

Set the ncpop.properties file: 

auto.mine.round4=true

Note if you wanted different fees for different rounds, you could have multiple miners run. Miner A could run rounds 1-3 at Fee X, Miner B could run round 4 at fee Y.

Note, it is advised to not use this and the cron expression - pick one or the other.

Can I run multiple PoP Miners?

For most people you should not need to. Whereas a PoW Miner (either GPU or CPU) is limited by Hardware and processing power and electricity - i.e. run 10 PoW miners for 10x more likely chance of getting a reward - a PoP miner is limited by BTC for the transaction fee.

It will be easier for someone to manage a single instance of the PoP miner, but mine more frequently by constantly feeding it BTC for the TX fees.

BUT... if you do want to run multiple instances:

  • Option A: You'll need to put them in separate folders on the machine and use different BitcoinJ wallets. Do not run the multiple instances of the same executable with the same wallet. Each copy will have it's own set of files: HowTo_run_PoP_Miner#PoP_Files
  • Option B: You can also run multiple instances on different machines, all pointed to the same remote NodeCore instance by setting the ncpop.properties 'nodecore.rpc.host=<remote_IP_Here>' (also see [[1]] to set up NodeCore to accept connections from the remote PoP miner)

Can I import a previous BTC wallet?

Yes, just copy bin\bitcoin-pop-*.wallet.

This will carry over the BTC balance.

Troubleshooting

"PoP Miner not ready" warning

Warning Solution
PoP wallet does not contain sufficient funds Send Bitcoins to your PoP BTC wallet address. Run commands showbitcoinbalance (it should be greater than zero), and sendbitcointoaddress.
Could not connect to NodeCore Ensure an instance of NodeCore is running, and you could connect to it from the NC_CLI and run getinfo
Bitcoin blockchain is not downloaded Ensure the ncpop.properties file has a line for bitcoin.network=testnet, and wait for the blockchain to download. There should be a message like "Blockchain downloading: 95%".
Bitcoin service is not ready Check the other warnings. There should be a message like "SUCCESS: Bitcoin service is ready".

I do not have any bitcoin

For mainnet, acquire Bitcoin via normal means.

For testnet, use a faucet to get test bitcoin. You can find a list of popular Bitcoin testnet faucets here: https://en.bitcoin.it/wiki/Testnet#Faucets.

Mining operation action took longer than expected. Operation can be resubmitted.

If you get an error, then try running the resubmit command: PoP_Miner_CommandLine#resubmit 

ERROR: Mining operation action took longer than expected. Operation can be resubmitted.

PoP Transaction must complete within a certain period of time to remain relevant, and hence it times out. For example, if there's an abnormally high amount of context headers, that may cause a timeout.

Why does the BTC address change each time I run the showAddress command?

Bitcoin addresses are just a representation of the public key from a public/private key pair. We generate new key pairs every time you run the `showAddress` command. The PoP Miner manages these addresses for you, so you don't have to worry about them. As a privacy best practice, it's best to always use a new address (key pair) every time you receive a payment. The reason the PoP miner (or any Bitcoin wallet) generates a new address each time you receive a payment is for privacy reasons only, because if you use the same address for many transactions, the peers you traded with will be able to identify which other transactions you were involved in, and your identity will be easier to tie to the address. [Credit: A sentence or two for this answer may come from an unknown tech source]


Failed to get PoP publication data from NodeCore

This kind of error implies that NodeCore is not ready.

Try to connect to the NC instance with the NC_CLI and run getinfo: 

Failed to get PoP publication data from NodeCore: Status{code=DEADLINE_EXCEEDED, description=deadline exceeded after 14999412514ns, cause=null}

Can you run NC_CLI getinfo?

  • Yes --> Then try to repeat the PoP miner operation.
  • No --> Troubleshoot NodeCore HowTo_run_NodeCore

Command Line Reference

See: PoP_Miner_CommandLine

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