Questions tagged [nodes]
Questions concerned with (full) nodes, i.e. relay points in the Bitcoin network.
246
questions
2
votes
2answers
53 views
Why do two different fully synced Bitcoin Core nodes differ in the blockchain size?
The size_on_disk printed when executing getblockchaininfo is 1.2 GB smaller than other nodes are reporting at the same time/block.
txindex=1
What could it be??
I've asked to other peers on twitter ...
0
votes
0answers
21 views
Noob question, how do nodes know about other nodes [duplicate]
I'm new to the p2p tech and I would like to figure out how it is working. How a new node knows ip addresses of other nodes, if there is no server? Writing classic software we usually hardcode a server ...
0
votes
1answer
48 views
Error while syncing with the blockchain on my Raspberry Pi
So I already have the node set up on my raspberry pi. This night the transfer of the Blockchain from my laptop to the raspi's hard disk finished. Now I am waiting for the blocks to match the headers
"...
0
votes
1answer
55 views
How To get Address Public Key from Account XPUB?
I am little bit confused or not able to get the right Address Node Public key from Account XPUB.
What i have Done :
1==> Get the Account XPUB [78Bytes]
2==> SHA-256
3==> SHA-256 Again
4==> ...
0
votes
1answer
23 views
How to determine the peer/node that created a transaction?
You're running your node and you receive a transaction from a peer, how do you determine if that peer created the transaction or if it is simply relaying the transaction. In other words, can you map ...
2
votes
1answer
26 views
Transaction propagation criteria vs mempool inclusion cirteria
Do Bitcoin nodes propagate every transaction or only transactions that meet certain criteria? For instance, a transaction with a fee of 0 won't necessarily get included into a block and it might even ...
2
votes
1answer
34 views
How to add a second user with SSH access to my Ubuntu PC running Bitcoin Core?
I have a friend who is interested in learning Bitcoin CLI, and I told him I would look into giving him access to my node - in a non-destructive way - perhaps testnet only ?
Totally trust this person, ...
1
vote
1answer
27 views
Do local nodes work across crypto types?
Newbie to all of this, hoping you can help with what is probably a "duh" question. I'll keep it brief, though: if I download the blockchain using the instructions given for the Bitcoin GUI, will I be ...
3
votes
3answers
190 views
Can we shutdown the Bitcoin blockchain?
I maybe wrong but what I think is the blockchain ledger exists as long as there are active nodes in the network. So can the Bitcoin blockchain be shutdown by shutting down power supply across the ...
2
votes
1answer
61 views
Is it possible to share blockchain data between multiple nodes?
I'm planning to create a Raspberry Pi Cluster in order to run several bitcoin nodes. Can I share parts of the ~/.bitcoin/ folder in order to not have to store the entire hundreds of GB for each of the ...
0
votes
2answers
90 views
How can I run a light (SPV) node on Linux?
I tried to sync the blockchain and, though I have ample free disk space (>500 GB on my computer, the chain is ~265) I've been having a hard time. So, how can I use an SPV node to send transactions and/...
0
votes
1answer
37 views
A question about transaction broadcasting and block creation
Let's say we have transaction X and transaction Y. The timestamp of X is chronologically earlier than that of Y. X's spender broadcasts X to the network and the same goes for Y's spender.
Let's say ...
0
votes
0answers
23 views
How do lightweight nodes and SPV wallets calculate balances?
Can they do it? Or they "talk" to a full node for that purpose and are used only for mining purposes?
Thanks in advance for your answers.
0
votes
1answer
18 views
My bitcoint-qt client is crashing due to insufficient file descriptors repeatedly even after I set the ulimits to 65535
What are the exact resource requirements for a bitcoin-qt client.
this is important and hard to find information.
In virtualization world those things need to be understood. :)
I am running a KDE 18....
0
votes
0answers
22 views
Where can I find a detailed network protocol spec? [duplicate]
I have been trying for a while to understand how the bitcoin network works, which I (kind of) do on a high level. However, all of the sources I read don't go into the details of the protocol that ...
0
votes
0answers
30 views
Running two nodes on the same network
Running multiple Bitcoin nodes on same network
That post discussed it, but I need a little more help than that. I am not totally sure what to do with the config file and the add node.
Where can I ...
2
votes
1answer
286 views
Bitcoind Node crashes after using -dbcache option
I've been trying to speed up my node sync by increasing the dbcache. However my node tends to crash overnight. My system is running ubuntu 18.04, 4GM of ram bitcoin core v0.18.
I've tried bitcoind -...
2
votes
1answer
43 views
How to prevent specific method calls to bitcoin node
I have setup a bitcoin node and can access RPC methods via curl or bitcoin-cli.
Now I don't want to share the node with multiple parties and in such case, I want to restict some functions from being ...
0
votes
2answers
63 views
What would happen if you tried to follow two Bitcoin blockchains from the same computer?
This will probably sound stupid but what would happen if you create an entirely new Bitcoin block chain and run it on the same computer. How does a node know which version of the Bitcoin block chain ...
0
votes
1answer
30 views
Can I connect to a node as read-only?
In my Electrum wallet I can open the Network Window and view Nodes I'm connected to. Here's an example: electrum4101870.fullhealth.net. I can also find public nodes at https://bitnodes.earn.com/nodes/...
2
votes
2answers
557 views
What is a txn? How can it be invalid?
I read this in a IRC exchange:
verifies your txns against a random node that you don't control. if for some reason that node went rogue, you might have accepted an invalid txn
What is a txn?
2
votes
1answer
79 views
Why isn’t connecting to your own local node a common feature for Bitcoin clients?
I come from the Monero community and connecting to my own local node running on my home PC is very simple whether it’s on the GUI, CLI or a mobile wallet.
Why does Bitcoin not have the ability to do ...
3
votes
1answer
52 views
How many nodes is too many?
Has anyone done the math on this?
For example, if we had 10’s of millions of nodes all connecting to 8 peers would there be some latency issues in propagating blocks across the network in the 10 ...
0
votes
1answer
41 views
bitcoin full nodes vs simplified payment verification
Why do individual nodes run "full nodes" that keep track of the entire blockchain whereas mechants can get away with "lite node" that implements "simplified payment verification" needing to examine ...
2
votes
2answers
1k views
Unable to bind any endpoint for RPC server
I recently updated my bitcoin docker image to bitcoing v0.18.0 version and can't allow external rpc connections to it now. It binds to localhost if I set rpcallowip=X.X.X.X, then I tried to used ...
0
votes
0answers
26 views
How can I check how many users have upgraded their Bitcoin Core software?
Bitcoin Core has just released their 0.18.0 upgrade. Is it possible to check how many users have upgraded to this version and also how many users are running older versions?
0
votes
2answers
63 views
How is pool hashrate share name known?
Since it’s not possible to know mining pools nodes addresses, how do we know the that a specific node owing 15% of share belongs to btc.com for example ?
0
votes
1answer
20 views
Is it possible to get the full list of synced nodes ɪᴘ on the network?
There are many website like https://bitnodes.earn.com/ but I’m failing to understand if they collect nodes from compulsory submission on the web interface for statistics purposes only or they use a ...
0
votes
0answers
39 views
Is 10K full nodes enough to bitcoin to avoid 51% attack?
As I know bitcoin has about 10K full nodes. And the question is in my mind is that: This number is not huge! If someone has 6K servers, Can control the bitcoin via 51% attack?
I was thinking if ...
0
votes
0answers
68 views
How to create a node to a private blockchain using Bitcoin core
Is it possible to create to connect to a private bitcoin chain with bitcoin core? I created a private bitcoin chain through regtest on one vm. Now I want to make a full node copy of it on a separate ...
0
votes
1answer
33 views
Bitcoin-Qt [11690]
I found this on my mac computer what is the meaning of this can you pls hep me to understand I am new to this;
Process: Bitcoin-Qt [11690]
Path: /Applications/Bitcoin-...
0
votes
1answer
55 views
Can't connect to bitcoin lightning node
Am trying to connect to https://1ml.com/node/02671251b5678771514df8f26cc01508606d697ae8cad38063f84becbd359b189f
From eclair app https://imgur.com/gallery/GoAMpjp it keeps saying failed to open ...
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vote
0answers
62 views
Wallet error ErrorFile=… /testnet3/wallets/db.log
I want to use two deamon for sync mainnet and testnet.
I Run $ bitcoind for mainnet without problem
After I run $ bitcoind -testnet But I get this error
BerkeleyEnvironment::Open: LogDir=/home/...
0
votes
1answer
159 views
Rewarding full nodes trough the Lightning Network
Sometimes I think "DASH" has some kind of advantage over Bitcoin because it has some rewards not just for the miners, also for the full nodes. Am I correct?
Is not this a strength (a prevention) ...
0
votes
0answers
38 views
Locating Bitcoin mining activity
There is any systematic way to locate Bitcoin mining activity (either block creation or node activity). I stumble upon with Bitnodes code which implements a recursive search using some nodes as "seed",...
0
votes
1answer
201 views
Bitcoind doesn't start
Im trying to make Stadicus guide work for both Bitcoin Core & LND
I did download the blockchain and moved to the HDD on my Rasp3
However, when starting the bitcoind service, im having this debug....
0
votes
2answers
50 views
Does a Node connect to all the peers?
Does a Node connect to all the peers in the network? Or just a few?
If its just a few, how many?
If its just a few, what about if all of those nodes in the list are malicious?
1
vote
0answers
20 views
Blockchain, correction of blocks
How do a malicious nodes correct their blockchain if they have it wrong?
If they don’t want to fix it, what happens then?
0
votes
1answer
51 views
Private Blockchains: Validation
I'm a software developer, and I have some questions about private blockchains, I'd like to have technical answers since I'm trying to understand blockchain at a code level. I'm going to write a ...
3
votes
1answer
222 views
Checking whether lightning node is online/visible
I just created my first lightning node and already have one active connection. My problem is however, that I do not see my node in any lightning network explorer. Is it possible to somehow check ...
0
votes
1answer
36 views
What happens to .blk files on disk when the Bitcoin daemon switches to a longer chain?
I’m interested in writing a program that will (1) parse the .blk files that my full-node Bitcoin daemon writes to disk and (2) write them to a relational database in an incremental fashion (i.e., ...
0
votes
2answers
80 views
Is it possible to create a wallet service, which doesn't have all the blockchain downloaded?
Is it possible to create a wallet service, which doesn't have all the blockchain downloaded? Like not running a full node itself?
2
votes
1answer
553 views
How is node capacity determined on 1ML.com?
I have set up a Casa node, using lnd, and opened 15 payment channels. The capacity of my channels, after almost 3 weeks, is exactly what it was when I opened the channels, leading me to believe that I ...
0
votes
1answer
102 views
How does bitcoin broadcast information?
On Bitcoin's Blockchain, how is information transmitted instantly to all other nodes and do nodes 'talk to each other' through an API?
Do Blockchain nodes communicate with each other through HTTP ...
0
votes
1answer
28 views
How does the Bitcoin network maintain the chains created when two nodes generate different versions of the same block?
I came across these lines from the Bitcoin whitepaper:
If two nodes broadcast different versions of the next block
simultaneously, some nodes may receive one or the other first. In that
case, ...
2
votes
0answers
58 views
How to get multiple connections to the same node
I'm playing around with connecting my node to another one of my nodes to see how many incoming connections I can handle.
Whenever I add node A from node B with bitcoin-cli addnode 1.1.1.1 add after ...
1
vote
1answer
48 views
Bitcoin full node sharing blockchain
Does anyone know how one might run two bitcoin full nodes on the same machine with both these nodes sharing the same blocks and chainstate files, is a symlink to these files enough or must something ...
1
vote
1answer
48 views
How is the Bitcoin node network different from the IOTA network? [closed]
I asked this question on IOTA's forum here:
Real incentives for running a full node?
One of the founders from IOTA Come-From-Beyond (Sergey Ivancheglo) responded with this comment:
"However, ...
4
votes
1answer
317 views
Why would running a light node riskier and subject to more frauds than a full node? We don't NEED a full ledger, do we?
I've been reading on light node and many have pointed out that the light node doesn't have the full blockchain and is riskier because they can't verify the transactions fully.
First, we can verify ...
1
vote
0answers
70 views
Why can't an ISP ban access to a blockchain network? [duplicate]
I read that blockchain sits on top of the internet and is decentralised. We still have to access the blockchain network via an ISP. Without ISP, we can't access the internet so why can't an ISP block ...
