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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.

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1answer
30 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
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0answers
46 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
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1answer
44 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 ...
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2answers
69 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)
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1answer
68 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
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1answer
23 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'...
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0answers
26 views

Sync stops when the blocks reach approximately 550.000,

I have done this several times and always the same result. So I have a configuration file like this server=1 rpcuser=chainapi rpcpassword=whyDidTheBulletProofElephantCrossTheRoad rpcallowip=0.0.0....
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0answers
31 views

Getting an error when syncing

I am trying to sync my bitcoin-core. Here is my bitcoin.conf file server=1 rpcuser=chainapi rpcpassword=whyDidTheBulletProofElephantCrossTheRoad rpcport=8332 rpcallowip=127.0.0.1 prune=550 dbcache=...
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0answers
21 views

Can not sync litecoin

Yesterday I have run litecoin core to sync all blocks. I've done it several times because everytime when when the blocks got to about 776600, the litecoin stops syncing. I have already run litecoind ...
1
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1answer
36 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 "...
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0answers
38 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
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1answer
43 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?
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1answer
42 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
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1answer
19 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
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2answers
134 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 ...
0
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0answers
53 views

How do i get a PoS coin to sync with nodes after Invalidateblock at a height?

I have forked a pivx clone using invalidateblock at certain block number 863781. Now i have made no changes to the code or protocol so i expect it to mint new coins starting from this height. i have ...
1
vote
1answer
46 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
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1answer
54 views

how do i setup a node for my altcoin?

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
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1answer
48 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
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1answer
39 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
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1answer
62 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
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1answer
88 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
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3answers
169 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 ...
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0answers
56 views

bitpay/bitcore v8.0.0 sync time

New version of bitcore https://github.com/bitpay/bitcore/tree/v8.0.0 How much time does the synchronization process take on Bitcoin mainnet for bitpay/bitcore v8.0.0?
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0answers
106 views

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

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....
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1answer
136 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 ...
2
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1answer
81 views

How Do Peers Choose Which Peer To Trust?

So the way I understand how the blockchain works is that each new block uses the previous block's hash, which means if my block[100].hash != someone_elses_block[100].hash that means that either I ...
0
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2answers
65 views

Very hard to sync Core Client from scratch

Recently I started running a Core 15.1 node with the blockchain on an external hard drive, and found it very hard to fully sync the blockchain. The problem I keep running into is that (in about 90% of ...
0
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1answer
47 views

How to Sync Main Net together with Test3 Net

After I install the bitcoin core, it just sync the main net. Is there a way that I can also sync the test3 net for testing/developing purpose?
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0answers
34 views

Is it possible to bootstrap from bootstrap.dat in recent bitcoin-qt?

I read, that recent bitcoin-qt versions are doing headers-first sync: https://bitcoin.org/en/glossary/headers-first-sync as opposed to blocks-first sync. As a result, when trying to bootstrap ...
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0answers
25 views

Network usage when mining

I'm interested in how active a user is on the network when they're mining for new bitcoin via a full node (not internet based pool or something). I know there's an initial syncing period to catch up ...
1
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1answer
48 views

Bitcoin Core reports progress only up to 0.999999

On older version - after full synchronization in debug log i see message progress=1.0 In new - only progress=0.999999, it`s normal or i have some problems with synchronization?
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1answer
63 views

I use Litecoin Core wallet on my PC and need to have it on laptop to take away on holiday

I am using Litecoin Core wallet on my PC, and I need daily access to it. I am travelling away from home at Easter and taking my laptop with me. I downloaded Litecoin Core Wallet to my laptop, but ...
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2answers
100 views

From where does a node download a copy of the ledger

From where does a node download the latest copy of ledger initially? Is this information stored in a 'central server'? Let's say a node is offline for a while, after coming back how will the node get ...
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2answers
51 views

Any attack vector for Proof of Witness?

When Alice wants to send Bob some coins all she has to do is sign a transfer of ownership with her private keys and publicize that announcement until Bob is happy with the number of witnesses. For ...
0
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1answer
244 views

Extremely slow syncing speed while starting bitcoin-qt on HDD [duplicate]

I'm sorry for adding dupelicate question (e.g. How to speed up initial block chain sync using SSD without wasting space?), but I observered a dramatical speed increase while using RAMDisk or some disk ...
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0answers
324 views

Bitcoin clone, node won't sync in main chain

I create a clone of bitcoin change some setting like port, and run a network of 4 nodes by docker to test and learn. When I run it using -regtest, every things goes well I can generate blocks and node ...
1
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1answer
130 views

Block #338819 deemed invalid by v0.15.1

I am attempting to sync from scratch a full node (v0.15.1) on a linux machine (Linux Mint running Ubuntu precise 12.04.1 LTS). The sync grinds to a halt on block #338818. From examining debug.log I ...
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2answers
320 views

Active connections and sync-ing my wallet issues [duplicate]

I have been trying to sync my wallet with the network for around 3 months, and it is still only at 45.29%. Any ideas? I am using Bitcoin Core version v0.15.0.1 (64-bit). I have UPnP enabled, I am ...
2
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1answer
516 views

Bitcoin Core - Go back to a specific block?

I have a full node of Bitcoin Core wallet. I would like to know if it's possible to delete data after a certain block. For example Bitcoin is currently at block 504385. There was a fork around block ...
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0answers
26 views

Older Bitcoin QT 0.10.0 balance total changes while synchronizing

First, I think I dont have a clue what im doing. Maybe you can help me. In 2015 I downloaded Bitcoin qt 0.10.0 to do some small payments with. I never used it again. When I opened it this week for fun ...
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0answers
10 views

Where's the downloaded file

ive been downloading this file (block?) for days. it has used all the space on my imac and is only 60% finished. clearly i cannot continue and need to reclaim the space lost. where is this file being ...
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1answer
144 views

Unbreakablecoin - Block Height Stopped Moving

I am running a full Unbreakablecoin (a Bitcoin clone) node. Blocks were being generated every few minutes or so, until about a week ago. Now, the block height has been stuck at 82666 for multiple ...
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0answers
57 views

Can't download the whole blockchain first time and already sent bitcoin amount to that wallet

I can't download the whole blockchain wallet to my PC first time. Already sent bitcoin amount to that wallet and it looks like I lost them, WTF? In the middle of downloading came this one: "Error: ...
0
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1answer
255 views

Running out of disk space with Bitcoin Core

A year ago I purchased some bitcoins and it was sent to my address. I loaded up Bitcoin Core and installed it to my laptop HD, it ran out of space on the HD, mid blockchain sync. It has now been a ...
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0answers
2k views

How to recover corrupted Bitcoin-Core blockchain?

I recently experienced a I/O error resulting in data block corruption or index corruption cause bitcoin-qt wasn't quitting so I forced bitcoin core to shutdown without killin it properly. I checked ...
2
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1answer
53 views

What is the name of the procedure of downloading and checking the ledger for a new node?

When a new node connects for the first time to the Bitcoin network, it first needs to determine what is in the ledger, and what is not. As far as I understood, it does so by connecting to the Bitcoin ...
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1answer
223 views

Is there anything I can do to speed up the synchronization of litecoinj?

I am using litecoinj which is forked from bitcoinj but compared to bitcoinj, the wallet creation and block synching is slow when using litecoinj. So, I searched for a solution and found a post that ...
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0answers
50 views

Synchronizing blockchain data to external hard disk [duplicate]

I've been struggling to find an answer for this, but it seems like there is no solid, well-documented answer for this. How can I use mounted external drive for blockchain synchronization? I ...
2
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1answer
1k views

Altcoin (Litecoin fork) creation. No synchronisation

i m trying to create an altcoin from the current Litecoin master branch on github. Its Litecoin in the version of 0.15.1. By editing some parameter in chainparams.cpp i m able to create my genesis ...