Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

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.

0
votes
0answers
12 views

Bitcoind block height keeps resetting

I am using a forked version of the original bitcoin repo https://github.com/btcdrak/bitcoin/tree/v0.13.2-addrindex Tag -> v0.13.2-addrindex I don't see any other error messages around this time, but ...
1
vote
1answer
17 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
25 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
34 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
31 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
14 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
0answers
17 views

Bitcoin Core sync problem. Run time error and closing down

I installed bitcoin core ( version .16.1 )on my computer and around 4 weeks ago it was up and running. As well I have Armory .96.4 beta. It appeared that both were working and on line. Somewhere ...
0
votes
2answers
78 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
votes
0answers
40 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
36 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
47 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
votes
1answer
39 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
35 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
58 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
67 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
124 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 ...
0
votes
0answers
42 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?
1
vote
0answers
81 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....
1
vote
1answer
117 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
votes
1answer
73 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
votes
2answers
61 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
votes
1answer
42 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?
0
votes
0answers
32 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 ...
0
votes
0answers
24 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
vote
1answer
45 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?
1
vote
1answer
52 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 ...
1
vote
2answers
88 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 ...
-2
votes
2answers
50 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
votes
1answer
216 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 ...
0
votes
0answers
287 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 ...
0
votes
1answer
104 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 ...
0
votes
2answers
277 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
votes
1answer
324 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 ...
0
votes
0answers
24 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 ...
0
votes
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 ...
1
vote
1answer
124 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 ...
0
votes
0answers
56 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
votes
1answer
226 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 ...
1
vote
0answers
1k 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
votes
1answer
52 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 ...
1
vote
1answer
206 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 ...
1
vote
0answers
46 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
votes
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 ...
0
votes
1answer
2k views

How long does it take to Sync my Litecoin Core Wallet?

I transferred litecoin from Coinbase to my LTC Wallet. I downloaded the wallet from Litecoin.org and it says it has to sync first before it can accept the transfer. Currently, it says that it is about ...
1
vote
0answers
70 views

Transfer incoming funds from Bitcoin Core to another wallet before blockchain sync is completed

This is my situation: I have a Bitcoin-QT wallet on my Mac (Qt version 4.7.4.- yes I know its very old). only recently I've been working out how to operate and exchange bitcoins. well to cut a long ...
1
vote
1answer
180 views

Migrate from Bitcoin Core Wallet to somewhere else before sync completed

I created a Bitcoin wallet yesterday using Bitcoin Core Wallet application and bought some bitcoin via buy.bitcoin.com to the address mentioned in File>Recieving Address in my Bitcoin Core Wallet. ...
0
votes
0answers
125 views

Old wallet unconfirmed from 2013

Anybody know what this means? Just restored it, its been synced for only 10 min but when I mouse over it just says unconfirmed. Do I wait or is something else going on?
2
votes
1answer
918 views

Bitcoind --reindex vs starting allover again

I setup a Bitcoin Daemon on a VM hosted on an OpenStack cloud. VM has 8 Cores and 32GB of Ram and 20GB of storage. I mounted a 1TB volume into the .Bitcoin/blocks folder. I started bitcoind and it ...
2
votes
2answers
2k views

Why is my Electron Cash not detecting any servers?

I am using Elecron Cash 2.9.4, and I opened the wallet by using the seed of my old (BTC) Electrum Wallet. I intended to get BCH.
0
votes
1answer
379 views

Exploring a local copy of the Bitcoin blockchain without running a full node?

I've been hitting the rate limit for API calls for different services and have decided that it would be easier to have a local copy of the blockchain and query that instead. See my previous question: ...