Questions tagged [synchronization]

This tag should be used for questions about synchronizing a Bitcoin client. This is the process of bringing a Bitcoin client up to date with the blockchain.

Filter by
Sorted by
Tagged with
0
votes
1answer
14 views

bitcoin core problem payment

I downloading bitcoin core on my computer. But my computer is full, and downloading is not complete. I made transfer my bitcoin to URI on bitcoin core, which downloading. But nothing came and I didn't ...
0
votes
2answers
38 views

How does a node find the active chain?

Let's say a user joins the Bitcoin network and downloads the latest state of the blockchain (all blocks, which includes the forks/uncles). How does this user find/determine the active blockchain on ...
1
vote
1answer
32 views

How can I start bitcoind without blockchain synchronization?

Suppose I make a locked wallet with 50000 pre-generated addresses. As long as I researched, only way I can collect those 50000 addresses using RPC and "getnewaddress". Feel free to correct me. I ...
0
votes
1answer
28 views

Does bitcoin qt need to synch before I can spend my change?

Sorry for the follow up question... i was trying to transfer my btc to a new wallet (believing the original one had been compromised). I sent 2 tiny test transfers of $1 then when they arrived in the ...
1
vote
0answers
25 views

Bitcoin Core Blockchain Sync Fatal Internal Error - Corrupt Block - Linux

I'm trying to perform the IBD on Bitcoin Core 0.18 and I continually receive "Fatal Internal Error" at seemingly random intervals, closing bitcoin-qt and preventing me from fully syncing. Farthest I'...
0
votes
1answer
37 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 -...
0
votes
1answer
73 views

Bitcoin core crash during IBD

I've been running bitcoin core on an android device (nexus 5x) and emulator, and sync on testnet always fails at around 3% progress the last thing logged is “pre-allocating up to position 0x900000 ...
0
votes
1answer
50 views

how can I recover my private key from my passphrase and password

I decided recently to get some BTC and bitcoin core was the storage solution I decided on. I downloaded the software, and all seemed good. No messages about storage or such. Around a month later I ...
0
votes
0answers
33 views

My Bitcoin client has stopped syncing

As you can see my client is stuck on 99,7% with unknown. Syncing Headers(577895), It has been in this state since last day synced(which you can see). How can I get it to work since I have plenty of ...
1
vote
1answer
29 views

Bcoin initial blockchain sync progress isn't saved

I'm using bcoin and it's class FullNode to run a full Bitcoin Node. Here's the configuration: const node = new bcoin.FullNode({ prefix: '/mnt/d/bcoin', network: 'testnet', ...
4
votes
2answers
121 views

What happens if a miner receives a block but not its previous?

Suppose the following: A miner has stored the current blockchain A-B-C. It stops listening for blocks during some time. During that time, blocks D and E are mined and broadcasted. The miner ...
0
votes
0answers
36 views

Importing the keys Issue

I imported the private keys into my wallet and they appear to be added: This is the result when i run getImportedKeys(): [ECKey{pub HEX=...
3
votes
1answer
71 views

Why my bitcoind cannot query all the blocks?

I just install the bitcoind and run: bitcoind -daemon and when i tried to: bitcoin-cli getblockhash 195876 i got an message: error code: -8 error message: Block height out of range the command: ...
0
votes
0answers
32 views

Do SPV nodes sync “headers-first”?

Headers-first sync is defined somewhat by BIP 130 and expanded upon with compact block relay in BIP 152. I believe this is the commit in which it was added to Bitcoin Core. The result is that Bitcoin ...
3
votes
1answer
37 views

Can bitcoin core verify a third party blockchain download?

If you were to obtain a copy of the bitcoin blockchain, i.e. a copy of someone's data dir excluding his wallet files on a removable drive or other storage medium, could bitcoin core verify that or not?...
0
votes
2answers
58 views

Bitcoin Core frozen trying to sync and/or connecting to peers

I downloaded Bitcoin Core directly to my laptop and sent BTC to what i believe is my wallet. The BTC is no longer in my senders wallet and I do not see it in my bitcoin core wallet. It was working ...
0
votes
0answers
38 views

How to most efficiently keep in sync blockchain on offline computer (including through bitcoin-qt upgrades)?

I have bitcoin-qt running on online computer. I want to: copy blockchain to offline computer (preferably using WORM media for security reasons) from time to time update offline copy with newest ...
1
vote
2answers
56 views

What is the quickest way to bring a bitcoind node up handling 99% of edge cases?

Currently when syncing a bitcoind node from scratch the time of going from zero (0) to about 50% is a very fast process but somewhere between 50%-75% it slows down considerably and at 75%-85% it ...
0
votes
0answers
128 views

“Processing blocks on disk” taking forever

I started download the bitcoin blockchain on a 250GB hardrive with prune=0, txindex=1 on bitcoin.conf file. I downloaded like 95% at a rate of around 10% per 8 hours. I didn't have enough free space ...
0
votes
1answer
42 views

Do checkpoints affect initial chain sync time?

I've seen some guides that suggest that initial sync time for a new full node can be accelerated by setting checkpoints: false but I don't understand why that would be the case. My thinking is the ...
0
votes
0answers
34 views

Is the connection problem between the Fork Litecoin wallets?

Recently, I decided to check how Litecoin wallets work on UBUNTU and found how to create the Fork Litecoin according to the Instructions. I have two computers, both have a VMware virtual machine ...
0
votes
1answer
65 views

Is backward syncing viable for full nodes?

Currently, Every Bitcoin Core full node has to download the whole blockchain at least once. This situation is even worse if pruning is enabled - the user has to download the whole gigantic blockchain ...
3
votes
3answers
127 views

Does a bitcoin node broadcast that it is full synced?

When a bitcoin core node is fully synced, does it broadcast to the rest of the network that is has finished syncing? If yes, where in the bitcoin-core source code is this implemented?
0
votes
1answer
61 views

How to see download sync speed when syncing the Bitcoin 0.17.1 Blockchain on Ubuntu 18?

I'm syncing the bitcoin 0.17.1 blockchain from the beginning on Ubuntu 18 using Bitcoin Core Qt gui client. Is there a way to see the download speed of the Bitcoin Blockchain and how much time I have ...
0
votes
2answers
66 views

How long does it take to update all nodes that have the blockchain so that they are identical?

Beginner questions... I understand that everybody has their own copy of the blockchain. If one person makes a change, for example a transaction, I assume that it has to propagate to all other nodes....
0
votes
1answer
33 views

Old Bit Coin Wallet Failing to Pass 180 Weeks

I have an old laptop that I have bitcoin wallet on. I left the computer alone since early 2015 and when I try to sync the bitcoin wallet, the wallet gets stuck on 180 weeks. the bitcoin wallet sync ...
0
votes
1answer
43 views

Does bitcoin validate transactions against the mempool?

I want to know whether or not bitcoin checks for the existence of transactions in the mempool as one of the many validation rules it performs for new blocks. If a transaction most exist in the ...
0
votes
3answers
94 views

How many nodes need to validate a newly created block?

It must be impossible for a newly created block to be propagated and validated by every node in bitcoin network considering offline nodes and the ones with poor Internet connectivity. How many ...
1
vote
1answer
156 views

Txindex=1: how to recognise the blockchain with this option?

This might be a dumb question: I started the Bitcoin daemon for an initial blockchain download. It immediately started downloading, I edited the Bitcoin.conf file with txindex=1. Stopped and restarted ...
3
votes
0answers
78 views

Bitcoind 0.5.3 stuck at block 364,670 - what to do?

I compiled bitcoind using the same steps as last year. In particular I set DB_CONFIG: set_lg_dir database set_lk_max_locks 537000 Unfortunately once I hit block 364,670 (2015-07-10) I'm treated with:...
5
votes
1answer
49 views

Is Bitcoin Core storage compatible across different machine architecture?

I want to run Bitcoin core on a raspberry PI (arm32v7), but the initial sync takes way too long. I am thinking importing the UTXO set from another of my node which run on x64. Would it work? Is it ...
3
votes
2answers
177 views

Bitcoin core wallet transactions and synchronisation

I have Bitcoin Core wallet. I wanted to know if each transaction I need sync the wallet? (I have a new business that accept bitcoin and I must to save each transaction)
-3
votes
2answers
560 views

Consensus issue, sync. stuck at “Synchronizing sporks - 25%” - PIVX fork

I've been working on a PIVX fork for some time, to better understand blockchain infrastructure and coding in general. I have been able to modify all parameters, remove checkpoints, set up a new ...
0
votes
1answer
24 views

Bitcoin Core chain download criterium

net_processing.cpp contains // If this set of headers is valid and ends in a block with at least as // much work as our tip, download as much as possible. why are we interested in chain that'...
1
vote
2answers
99 views

I am unable to sync with the network because I have too little disk space

I downloaded Bîtcoin Core on a laptop without knowing it takes up a lot of space and my laptop has only 128 GB disk space. It keeps saying "low disk space" so it won't sync. I sent lots of bitcoins ...
1
vote
1answer
106 views

Bitcoin node synchronization speed up [duplicate]

I'm running a docker image with a bitcoin node (version v0.16.3.0-g49e34e288) and it's taking more than week to synchronize, having only synchronized 54% of the blockchain. I'm running it with the "...
1
vote
0answers
94 views

It's October 2018. ./bitcoin-qt -reindex-chainstate takes forever. Is there a way to speed this up?

Current version: Bitcoin Core 0.16.3 I think I have a corrupted blockchain download as my VM box was shut down in the middle of syncing. Which is why I'm doing a -reindex-chainstate I have the ...
2
votes
1answer
376 views

My system is syncing headers, what does that mean?

My system got shut down while I was syncronising. Please help me, it's showing "Unknown. Syncing Headers" and estimated time is unknown. What is happening here?
0
votes
1answer
91 views

bitcoind syncing backwards

I recently upgraded an old bitcoind install (core 0.11) to 0.16.2. After starting it up, it seems that it's syncing backwards: going from higher block numbers to lower ones: 2018-09-12 06:35:20 ...
1
vote
1answer
33 views

How to get output linked to input in SPV node?

We're working on bitcoin SPV wallet. After setting bloom filter, we only get merkle blocks, and transactions that match the hashes we set plus some false positives. If a transaction is where we SEND ...
0
votes
2answers
323 views

Slow sync running Bitcon full node on Mac Mini OSX

It is Jul 2018, I need help after several attempts to sync a full node running on a Mac Mini. I have tried several times and Bitcoin-qt starts pretty well for the initial sync, downloading with ...
1
vote
1answer
55 views

While attempting to fetch a particular block my node just gets disconnected by peers?

A system at an office has its testnet node stuck at a particular block. The logs report "requesting block" over and over again for the same block and after each one reports "socket recv error" and ...
0
votes
1answer
94 views

how do i setup a node for my altcoin? [closed]

I just created a new altcoin based on foocoin or barcoin. But now i need my wallet be synchronized. There's some way to setup a node without any cost or low cost for my wallet? By other part, i just ...
0
votes
2answers
116 views

Accidentally shutdown system while Bitcoin Core client was synchronizing

My computer was accidentally shutdown while Bitcoin Core was synchronizing and it is now giving the error fatal error please see error log. Please tell me what is the solution to this problem.
0
votes
1answer
50 views

synchronizing after many years

Several years ago, without really understanding the mechanics relating to bitcoin, I believe I might have managed a bit of mining. The "Bitcoin-wallet" and other files, including my wallet.dat file ...
1
vote
1answer
84 views

Can I do transactions while Bitcoin Core is being synchronized? [closed]

How long does this process take? It is telling me 46 weeks left but its doing this for months. How do I speed of the synchronization? I downloaded it from their website. It is the latest version of ...
2
votes
1answer
133 views

How does headers-first prevent fill-disk attack?

Checkpoints prevented an attack where a node could mine many many low-difficulty blocks from an early point in the blockchain and serve those blocks to syncing nodes who would see their disks fill up. ...
0
votes
3answers
355 views

bitcoind sync time incredibly slow

I am currently running bitcoind v0.16.0.0 on my macbook (osx 10.12.6) and the initial sync time is really slow. I'm syncing at roughly 88 blocks per hour which would mean it would take another 2 ...
1
vote
0answers
161 views

Atlcoin: Peers don't sync after one creating new block [closed]

I have made an altcoin flowing these steps: 1. Generate genesis block and modify in source code genesis = CreateGenesisBlock(1525404232, 5226643, 0x1e0ffff0, 1, 50 * COIN); consensus....
1
vote
1answer
173 views

Downloaded and installed bitcoind--bandwidth usage gone through the roof

I downloaded the Bitcoin Core daemon on a Ubuntu 16.04 platform from the bitcoin PPA. sudo apt-get install software-properties-common sudo apt-add-repository ppa:bitcoin/bitcoin Press ENTER to ...