Questions tagged [full-node]

Nodes that fully verify all of the rules of Bitcoin. The most popular software implementation of full nodes is called Bitcoin Core.

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How can I view in my shell, live, ALL activity my bitcoind is generating?

Having examined the output of bitcoind -h and searched through all the bitcoin-cli rpc items listed here https://bitcoincore.org/en/doc/0.19.0/rpc/ I did not find anything which produces a live ...
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How Do Attackers Forge Bitcoin Blocks And How Do You Identify Forge Bitcoin Blocks? [duplicate]

I have read that a block contains several bitcoin transactions and an attacker can forge fake blocks. Does these forged fake bitcoin blocks cost the attackers money for mining or was it just ...
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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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How to tell if my node is online (conflicting information)

I am really confused. I am attempting to set up a listening node. When I look at bitnodes.earn.com it shows my node as offline when searching by IP, but when I run getconnectioncount it returns a ...
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How to achieve fast mempool synchronization at startup?

I just started my 'occasional' full-node and I am watching the size of the mempool grow after full block synchronization - watch -n 3 'bitcoin-cli getrawmempool true |jq "length"' - it has around 4000 ...
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Bitcoin Core full node has saved a lot more space than 260gb

I've had Bitcoin Core running on my Macbook i5, 8gb ram, the last five nights and have gotten to 58%. It's downloading to an external hdd and now the blocks directory contains 375gb of data. Another ...
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Bitcoin Core full node download crashes all the time

I'm downloading the full blockchain for the first time, and have only got a couple of laptops with i5 and 8gb ram and a couple of external hdds. The download has run for a long time on one of the hdds ...
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Opening Full node

When I try to open my node this is the error that pops up "Error: Cannot parse configuration file: parse error on line 1: curl https://bitnodes.io/install-full-node.sh | sh." Does anyone know how to ...
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1answer
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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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Does bitcoind ERROR “Disk space is too low!” refer to RAM or actual harddrive?

After having finished the "Initial Block Download" I needed to reindex: [BTC_Core_Expmnt]# bitcoind -reindex -datadir=/mnt/BTC_Core_Expmnt The debug.log showed everything starting up ok; and the ...
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Blocking Port 8333 and other open channels in bitcoin core

in another post someones wrote, Bitcoin nodes use to communicate with each other. You can disable incoming connections on your node if you don't like that (set listen=0 in bitcoin.conf). Now i ...
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Electrum server full node bitcoin core wallet- how to block all outside access?

i have read that with an EPS electrum server, other nodes in the network can "ping" your port , i believe the port no. was 8333. How can I for sure and for any situation block such accesses? The EPS ...
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Bitcoin Core full node wallet - questions about security & recovery

can you tell me pls, 1) Which secure full node wallet implementations exist? Currently I just know of bitcoin core. Is there not any other one with a GUI? 2) Can you use a Ledger device with those ...
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How to run bitcoin core in the cloud with virtual server?

can you please explain to me, or link me to other understandable sources, how you can use bitcoin core with a cloud provider? My intent is to not physically have an own server but to use a cloud ...
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Cannot open dump wallet file (code-8)

Is anybody familiar with this problem using btc qt debug console? Would like to dump wallet and sweep into electrum.
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Hexadecimal Bitcoin Transactions

Suppose I have a random transaction which I recovered from blockchain blk****.dat file. How can I calculate the number of confirmations of this transaction? I dont want to use the RPC call ...
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Bitcoin P2P API getBlocks always returns 500 inv items

I'm trying to build a mini full node so that I can understand exactly how they operate. I've managed to get a few parts of the P2P api working however I am stuck with basic things like 'getblocks' and ...
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bcoin daemon killed over and over again [BCOIN]

I am setting up a full bitcoin node using BCOIN. I spinned up a VPS on Google Cloud. Specs: 2 CPUs and 7.5 GB of RAM. 500gb of standard storage. OS: Linux ubuntu. As I start the daemon, things go ...
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Why Full Node stores whole blockchain instead of only the UTXO set?

So I have started learning bitcoin recently (from Bitcoin and Cryptocurrency course @ Coursera). And I just learnt that there are "Full-Validating Note" out there that are: Permanently connected ...
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How can I use backup up chain data from pruned node to set up (archivial) node without IBD?

My setup is an old (~2012) laptop + small SSD and a NAS with HDDs. I noticed that trying to sync Bitcoin Core (v0.18) on the NAS was slow, but on SSD was very fast. (Everything is connected via ...
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Get transaction data from full node

Background Information I am building an application that requires the ability to query any bitcoin full node (from a python script using raw tcp sockets) in order to read the OP_Return value listed ...
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How do I ask for witness data from a Bitcoin full node?

So, I'm trying to build a Bitcoin block explorer using my own Python library. I'm doing it just as an exercise to better understand how Bitcoin works under the hood. Right now, when I send a block ...
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Does every node has a whole copy of the blockchain?

As i read here, in a blockchain "each node the has a copy of all transactions ever made". This to me seems impossible, bitcoin exists for a long time, and the memory size of the intere blockchain ...
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Can bitcoind and btcd share a datadir?

I've already fully synced the blockchain with btcd, can I point bitcoind at the same datadir and use its contents?
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Can a node broadcast a valid signed raw transaction while still syncing?

Built and signed a native bech32 UTXO, but when I attempt to broadcast from my testnet node using the command sendrawtransaction it returns "missing inputs". I don't have the private keys in my wallet,...
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Is it actually possible to install Bitcoin full node on a Raspberry Pi 3B+?

A Raspberry Pi 3B+ has only 1GB of ram and this official Bitcoin Core page shows that minimum requirement is 2GB ram and 200 GB storage with 100MB/s read and write speed. But I see a lot of articles ...
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can i run a full node on a laptop without a 3rd party router?

i am using verizon fios and have attemped to connect to full node. verizon said that i can n0t do it on their router and would need to purchase a 3rd party router and daisy chain to theirs. Any ...
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Blockchain Explorer for local full node

I would like to build my own blockchain explorer because I have found that using the API's of 3rd party blockchain explorers only gives me around 2 or 3 requests per second. Does an open source ...
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I get invalid argument error when running bitcoin-cli -getnetworkinfo, and a few other parameters

So I have bitcoind -daemon running and it appears to be generating the blockchain. keeps saying Potential stale tip detected, will try using extra outbound peer... The issue is I run bitcoin-cli ...
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Please take a look at my server print out to see if all looks well or if the repeating errors mean something is wrong

So it is not clear to me if my bitcoin server is syncing and all is fine or if the "potential stale tip detected, will retry extra outbound " message means I have to do something. Searching for that ...
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Types of onion address

I'm running a bitcoin core full node with Tor and I've configured a hidden service for that. The point is: bitcoin core log shows me an onion address which is very smaller than the one I found in /var/...
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difference between inbound and outbound connection

I'm running a bitcoin full node (bitcoin core) via Tor. I noticed I have only outbound connections (using maxconnections=16 in the conf file), but not even an inbound one. So which is exactly the ...
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Syncing blockchain with prune enabled

I'm syncing a node with prune enabled. Will it download the whole blockchain and then prune to my given settings after, or does it prune as it syncs? I'm currently 34.85% synced Blockchain directory ...
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Electrum-personal-server isn't seeing any historical transactions; using a Trezor

I followed the instructions in the Electrum Personal Server guide. I know that the transactions are there because I checked wallet.trezor.io. But none are showing up in Electrum. I have run --rescan. ...
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Can I run a bitcoin full node on my laptop and use a external hard drive to store the blockchain?

I tried setting the datadir=/Volumes/BLOCKCHAIN (which is the path to my external drive). Then I ran bitcoind and this is the end of the output, right before it kicks my drive out and gives me a Bus ...
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Was the first full node IP address Satoshi's and how did shim hide it?

It is not surprising that people assume Satoshi used ToR when scouring the internets however if my understanding is correct in order for someone to run a full node they need to provide their IP ...
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1answer
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Local balance query for Bitcoin address

I would like to be able to query the balance of an address (not belonging to me). The data should come from a fully synced bitcoin full node inside the local LAN and I do not want to query any api ...
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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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1answer
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Running multiple bitcoin instances on same server system

I wish to run multiple instances of bitcoind on my server to support highly read intensive RPC applications. Following links: how to run multiple bitcoind node on one server? Running Multiple Full ...
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Will the size of Bitcoin core full-node be too big to run on a normal computer?

I am a Bitcoin enthusiast, with no background knowledge in computer science and cryptography. I once ran Bitcoin core on my laptop but realized that it occupied too much space in my computer. I ...
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What are some affordable options for running a full node?

I would like to start running a full node so I can start building bitcoin/lightning applications, but my laptop doesn't have the storage to do so. Does anyone have any suggestions on how I can ...
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Bitcoin network resources requirement

Supposing we are alone, could it be possible to run the whole bitcoin network and full capacity of it (maximum transaction per second by different peer) on a low end computer, and how can someone ...
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Bloom Filter Response Processing In terms of Full-node

A SPV node have to work somethings to see whether his transaction is exist or not. Construct his filter with hash of transactions {his transactions, other1, other2, ..., otherN} filterload is filled ...
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Does rpcpassword need to be non-obvious in bitcoind?

I'm syncing a full BTC node onto an external hard drive, which I'm connecting to by USB. I've created a bitcoin.conf file which sets a very insecure rpcpassword. This is literally the only field I put ...
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1answer
183 views

No inbound connections on my bitcoin full node with TOR

Can someone connect to my running node? u3ob433qu3ebkmsu.onion:8333 I'm behind a CG-NAT so I've thought using TOR would solve my problem. I had my node running for hours but no inbound connections. ...
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Bitcoin API standard

I'm trying to implement a bitcoin full node while learning a new programming language, but I can't find the full set of public API that the full node has to expose. I assume the standard will be ...
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Acces Casa full node with Python

I have a bitcoin-core full node running and I want to access my node in Python, how can I retrieve the blockchain info?
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How could an attacker with more than 50% of full nodes hurt the bitcoin network the most? [duplicate]

According to Luke Dashjr's stats there are currently around 61.000 bitcoin nodes supporting the bitcoin network. https://luke.dashjr.org/programs/bitcoin/files/charts/historical.html What if an ...
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Possible to run a Lightning node on same computer as Bitcoin Core node?

I have a Windows 10 laptop that is running a full Bitcoin node using Bitcoin Core. Is it possible to also run a Lightning node on the same laptop simultaneously with the Bitcoin node?
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What role has bitcoin-init as a process?

I have set up a node on a RaspberryPi. When I check for active processes with top I see bitcoin-init occupying 50% of memory and 7% of CPU. I can check for bitcoind and it is active: bitcoin@...

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