Questions tagged [nodes]

Questions concerned with (full) nodes, i.e. relay points in the Bitcoin network.

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71 views

If I buy an ASIC miner and run it at home, do I become a Bitcoin node?

I tried to find the Bitlist visualization as mentioned in the documentary The Rise and Rise of Bitcoin, but could not but instead found https://bitnodes.io/ It says there are 9741 nodes. Does that ...
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1answer
240 views

Can a customized or non-bitcoin node be made to talk to a bitcoin node?

Is it possible to create a node with some different code from the bitcoin nodes but still able to talk to the bitcoin nodes? Is it possible for someone to customize their own node to add some ...
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How many computers are connected to the “Ledger” or the Blockchain of Bitcoin?

Somebody asked me about Bitcoin and I explained to him many many computers are connected to the Blockchain to keep records of all the accounts (or to keep addresses of the bitcoin and owner?). But how ...
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39 views

Can I be the transaction processor and take in transaction fees as income without mining a Bitcoin?

Can I be the transaction processor and take in transaction fees as income without mining a Bitcoin? Would the fees be so low that it is not practical? Or is it true that I have to be a miner in order ...
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96 views

What stops an attacker from crippling the Bitcoin network?

An individual (or government) who wants to bring down the Bitcoin network could conceivably broadcast a ton of junk/illegitimate transactions to the network thereby consuming the bandwidth and ...
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How to reliably check if your bitcoin onion node is reachable as advertised?

If getpeerinfo returns a good number of outbound onion peers but none show up as inbound:true, how do you check if your node is properly reachable as advertised? Several guides and forum answers ...
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41 views

What bitcoin core options can be changed without a restart?

I often experiment with new bitcoin core options (like zmq, debug and fee options) and I would like to avoid restarting my node for them to take effect. If I am not mistaken, changing the RPC password,...
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nodes are run to get rewards or just to help bitcoin [duplicate]

I wanted to make a share of my help in bitcoin validation. my question is do Running A Full Node to validate transactions pays reward back or not so I can also benefits from my help to the community
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how does bitcoin's 6 confirmation really help?

I've read the following: transaction is “confirmed” once it is buried 6 blocks into the blockchain. This is taken to be a sufficient proof of work such that reversing 6 blocks to double spend coins ...
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How exactly does “CoinDance” determine the current number of public Bitcoin nodes?

On this URL: https://coin.dance/nodes It says how many public Bitcoin nodes are currently active in the world, and how many Bitcoin Core ones. While it's good that I can grab these numbers from that ...
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Lightning Node hardware

Will I, or anybody have more capabilities with a Lightning Node, that is CPU or GPU Powered? For instances a more powerful computer vs Raspberry Pi’s
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Can you run a full Bitcoin node on Node.js?

Are there bitcoin full node implementations running on Node.js? Node.js is the server side language that I'm most familiar with so I was wondering if I can run a full bitcoin node on Node.js? I just ...
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Why was the BIP33 (“Stratized Nodes”) never implemented?

What are the technical reasons that BIP33 was never implemented ?
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bitcoin node take transactions fee and validate them [closed]

a bitcoin node check transactions and validate them . does it take transaction s fee. when validate transactions how much bitcoin transaction fees for a node.and possible reduce fees in a bitcoin node
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Can you help me tell if my new out-of-the-box ssd for a Pi4 myNode project is DOA?

Trying to setup a node on a Pi4 with ssd and blockchain appeared to be downloading well. My router said I was gobbling data for 2hrs. Then I received the "Looking for Drive" message. I rebooted once, ...
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Why do I have to update my node version if I am up to date?

So a few months ago I unplugged my bitcoin node when it was running perfectly. So when I connected it again this week I had to let it sync to the blockchain again. Now you can see it's synced but I ...
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Does it possible to connect to remote node with RPC API?

Does it possible to connect to remote node with RPC API? I want to get address balances of massive addresses but I don't want to hold my own node because its size. How can i connect to remote node ...
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61 views

What kind of bug does bitcoin core possess that have to be replicated

In order to build a bitcoin client accepted by the current bitcoin nodes we to have to emulate the C++ code present in the bitcoin core client, with all its attributes even the bugs. For example the ...
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How could be useful the softforks field that provides the RPC command getblockchaininfo?

When I execute the command getblockchaininfo I see useful information but I don't understand how to be useful the information that is displayed through field softforks, the example below: bitcoin-cli ...
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55 views

How do bitcoin nodes agree who first mined ablock?

Once transactions are broadcast and a node starts working on a proof of work, and finds it, it broadcasts it to all other nodes for that block to be verified and added onto their blockchain. All nodes ...
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How can you trust Bitcoin nodes?

If you send send a transaction request to a node, what is to to ensure that node doesn't simply log your private key and do nothing? What is to stop the entry node from taking a transaction intended ...
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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 ...
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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 "...
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265 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 : Get the Account XPUB [78Bytes] SHA-256 SHA-256 Again Created Extended XPUB (XPUB ...
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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 ...
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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 ...
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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, ...
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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 ...
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285 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 ...
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1answer
144 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 ...
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163 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/...
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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 ...
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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.
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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....
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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 ...
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70 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 ...
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1answer
2k 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 -...
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1answer
76 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 ...
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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 ...
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1answer
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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/...
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845 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?
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265 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 ...
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1answer
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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 ...
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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 ...
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3k 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 ...
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73 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 ?
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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 ...
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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 ...
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1answer
38 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-...
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1answer
61 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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