Questions tagged [synchronization]

Syntonization is the process where your node / client (geth, Ethereum Wallet, etc) receives the most up to date data from the Ethereum blockchain.

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762 views

The method eth_syncing does not exist\/is not available

I am starting geth like the below command Geth "--ipcdisable --rpc --fast --datadir="path" --rpcapi personal" I want to get the blockchain synchronization details from geth. So I issue the ...
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1answer
154 views

If geth sync is interrupted (network downtime), will restartin sync from where it left off cause a corrupt chain?

I'm on Ubuntu 14.04. MSI Z97 Gaming 5 board Haswell G3258 CPU Corsair Vengeance 8GB DDR3 RAM Sapphire Radeon 390 Tri-x OC GPU X5 EVGA 1000G PSU X2 Samsung EVO 120GB SSD I'm not sure what else to add ...
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Question on initial sync and Freezer (SSD and HDD)

I've kicked off a fresh fast sync of Geth v1.9.2 and after 3 weeks it's still pulling states (state trie). As per the documentation you can use the Freezer with a HDD as it references old data so ...
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270 views

Conflicting reports on sync mode and inability to see balances

I've been trying to maintain a full node for several months. It seemed to be working until I noticed zero balances this morning. etherscan.io site confirmed that balances are not zero, so ...
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Header broke chain ancestry, Synchronisation failed, dropping peer & retrieved hash chain is invalid

System information Geth version: Geth Version: 1.8.22-stable Git Commit: 7fa3509e2eaf1a4ebc12344590e5699406690f15 Architecture: arm Protocol Versions: [63 62] Network Id: 1 Go Version: go1.11.5 ...
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73 views

Spoofing of totalDifficulty variable

Péter Szilágyi, in his talk in Taipei, claims that totalDifficulty can be spoofed: https://www.youtube.com/watch?time_continue=575&v=qJA6J0mP73w How is that possible? Can the variable only be ...
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GETH gets out of sync from time to time

GETH tooks 6 days to sync, after that it will get out of sync from time to time. (PC is running with SSD, never shutdown, and network availability is 100% with 500mbps connection). May I know how ...
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Parity create testing transactions and blocks

For test purposes, I would like to make test blocks including test transactions against main net. For example I would like to make a transaction that sends one ether from 0x1234567... to 0x99999999......
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1answer
484 views

Parity 1.7.8 is syncing the last few blocks very slowly

I have been using the parity client to download the ethereum database for the last few days. Despite using the warp sync to download it, I havent been able to download the last few blocks fast enough. ...
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664 views

Can't complete synchronize the blockchain

I've tried to perform removedb, I've tried to go to different internets (my house, Starbucks), but I still get the same errors: INFO [06-09|20:10:17] Imported new block receipts count=...
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Ethereum blockchain size as of March 2017 (geth --fast and others) [duplicate]

What is the size of the Ethereum blockchain as of March 2017? I am just starting with geth --fast -cache=1024, but I would also be interested in other clients or other downloading methods. I know ...
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242 views

Ethereum Wallet testnet not synching when mining

I am trying to mine on the testnet. Unfortunately, my Ethereum Wallet (latest version using Geth 1.5.3) kind of gives up doing anything when I click on start Mining on testnet. The time counts up is ...
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63 views

Parity not syncing anymore [duplicate]

About 2 days ago I started to download Ethereum's blockchain with Parity. After a while, I tried to start Parity with a few flags parity --geth --ui-interface 0.0.0.0 --ui-no-validation, so I would be ...
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177 views

Ethereum wallet shows “no accounts yet” and 0.00 balance [duplicate]

I last used Ethereum wallet in June or July this year. Yesterday I upgraded on macOS to 0.8.7. It is syncing very slowly; at this rate it will take a week to finish the remaining 189,000 blocks. In ...
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316 views

geth shows last block 0, but on import says all blocks present

I'm trying to restore a corrupt geth DB to a previous version, when I run geth it says I1109 17:36:34.009514 core/blockchain.go:213] Last header: #0 [d4e56740…] TD=17179869184 I1109 17:36:34.009547 ...
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~/.ethereum takes a lot of disk space. What can I clean up without having to sync from scratch?

I am using cpp-eth on freebsd 10.3 with SSD and ~/.etherium takes about 41 Gb of disk space: ~/.ethereum # du -sh * 4.0K config.rlp 41G d4e56740 0b geth.ipc 4.0K keys....
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Getting up to sync with the network [duplicate]

At this point I've given up any hope. I've tried syncing with geth --fast --cache=1024. I have ~99% synchronization and the remaining ~1% (the last 1000-2000 blocks) is taking forever. With Parity ...
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My Ethereum balance not showing up in Mist 0.8.6 or Ethereum wallet 0.8.6 [duplicate]

I have just switched to parity because geth doesn't work at all for me. I have synced and opened new mist 0.8.6 but I don't see my balance. What am I doing wrong? How to add an account and show my ...
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518 views

Private network with 2 servers on scaleway

first of all thank you for the great discussions and solution that I've found here. I'm trying to create a private ethereum network to which I want to access with 2 different servers. I am able to ...
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140 views

Raspberry Pi: Geth slow sync every time reboot

Since the first sync (I copy the chaindata folder from my local machine to the RPI), every time I start the RPI it takes hours to just sync 20k blocks. I tried geth --cache=512, etc. I am using ...
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581 views

Why I can not use ./geth --testnet --fast --cache=1024 --jitvm for geth 1.4.7?

I tried two times. Each time block count is for mainnet and there is no any chaindata for testnet
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ETH deposit to mist wallet, but balance not showing [duplicate]

I made an ETH deposit to my Mist wallet, but the wallet does not show any balance after 100 confirmations. The wallet is new and blockchain is still syncing. Any idea how I can solve this issue?
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Are there any bootnodes for the revived Ropsten testnet?

After Ropsten is revived from the attack, I tried syncing with geth --testnet removedb && geth --testnet --fast but I got inconsistent results every time. Currently, eth.getBlock('latest')....
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511 views

Test Net not syncing

I sent my presale wallet to the main account of my Mist Eth Wallet using MyEtherWallet.com. It said it sent and my presale wallet is empty but it has not showed up on my Mist wallet yet. Also it says ...
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3answers
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Anything that can be done about slow Parity Sync?

I've tried resetting the sync and it still comes to a screeching halt around block number 2.4m. I know about the attacks on Ethereum around those blocks, but this is ridiculous: I've been syncing for ...
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1answer
1k views

sync parity or geth starting from block x

I'm having issues syncing geth and parity as detailed in other posts. What would be ideal is if you could sync starting from the current block only as I dont really need historical blocks anyway. Is ...
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3answers
3k views

Node on private blockchain with custom genesis file not mining nor synced

I am running two nodes over a private blockchain with a custom genesis file that uses the new "config" recommended here. However, aside from the random handshakes with external nodes I am trying to ...
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1answer
1k views

Parity on Windows 64bit Questions

Today I downloaded Parity for Windows. Start it with parity --author 0x9999999999999 --rpc --rpcaddr 192.x.x.1 --rpcport 8545. Then I have started ethminer ethminer -G -F 192.x.x.1:8545 When I go ...
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1answer
1k views

Can I use my Ethereum accounts on different computers?

I'm used to synchronize my data on different machines. Depending on the data I use Git, Dropbox or Syncthing. Is this possible with Ethereum accounts, too?
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I sent a transaction and got a hash, but blockchain explorers don't see it. What happened?

I used in the eth client web3.eth.sendTransaction({from:sender,to:receiver,value:amount) to try send some ether, typed yes to the question, then got a hash number ...
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2answers
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How to test chain reorganization with testrpc?

I am working on blockchain synchronization script. I need a way to make reorganization programmatically for testing purposes. Is there such functionality in some testrpc?
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1answer
766 views

How to find out how many blocks left to sync? [duplicate]

When syncing with geth, how do you know how many blocks are left to be fully in sync?
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2k views

Time to download blockchain these days?

I'm trying to download the blockchain using geth. I started it around 10 days ago, without the --fast parameter. After about 7 days it got corrupted at block 1.800.000 or so. Then i tried starting ...
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2answers
1k views

geth error with --datadir /Volumes/XXX

I installed Mist (geth v1.6.0-stable) on MacOs and the sync works just as normal. I'm trying to run geth and use --datadir to use a external HDD volume. This fails with the error message geth.ipc: ...
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419 views

Why doesn't ethereum have a fast relay network like Bitcoin?

I'm talking about nodes that miners connect to that help relay blocks fast, to reduce hash power wastage and forks: http://bitcoinrelaynetwork.org/ and http://www.falcon-net.org/
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1answer
284 views

Why does Ethereum Wallet application delay its startup until fully synchronised?

When Ethereum Wallet is launched, it displays a splash screen with synchronisation progress and a link Launch Application to skip waiting for being fully synced: What is the rationale here for ...
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1answer
487 views

Synchronisation failed: peer is unknown or unhealthy

I am getting this error message while synching my geth node: eth/downloader/downloader.go:278] Synchronisation failed: peer is unknown or unhealthy Why would a peer be considered 'unhealthy'? Is ...
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1answer
2k views

Downloading full blockchain again after using geth --fast on 0.7.4 [duplicate]

I've downloaded the newest mist browser on a new pc and used geth --fast. After fully syncing (which was about 1,5 hours) the syncing started from 0 again, but this time slow, downloading the whole ...
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1answer
591 views

How to transfer the Ethereum blockchain to another user session?

My client was not syncing at all. I have installed a new wallet in another user session with new wallet addresses. Wallet 2 for user 2 on the same Windows 10 machine has downloaded the entire ...
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2answers
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Transaction rolled back and re-mined later?

A few hours ago, I was testing my dapp on ropsten and something strange happened. I sent a transaction (A), to the blockchain, it got mined and my server synced it. Then 30 minutes later, I sent ...
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1answer
1k views

“being full node” vs.“being sync” : Are they the same?

When we try to be sync using Parity or geth, Does it mean that we are trying to be a full node ? And is it correct to say that: being sync = being a full node = keeping the entire blockchain ?
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geth reports nothing after allocating cache and handles

INFO [05-16|10:32:21] Starting peer-to-peer node instance=Geth/v1.6.1-stable-021c3c28/windows-amd64/go1.8. 1 INFO [05-16|10:32:21] Allocated cache and file handles database=C:...
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1answer
362 views

Geth stuck at Block #2721823 “invalid v, r, s values”

title says it all: Geth syncing stucks at block 2721823 ... I downloaded the newest version 1.5.4, started first with the flag -removedb, than with -fast -cache 2048. Everything went smooth, untill ...
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1answer
624 views

Interpreting the messages recieved during synchronisation on geth

I'm presently synchronising to the Ethereum blockchain using geth. I'm seeing two types of message and have a bit of an understanding gap in what they mean. The messages are shown below, with my ...
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2k views

Ethereum-Wallet Unable to connect to node, see the logs for more details

Previously I had the official windows desktop ethereum-wallet synced and working, but the other day my computer crashed and corrupted my blockchain sync, so I deleted my chaindata folder and started ...
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2answers
359 views

Mist 0.7.1 on Mac not updating blocks; unable to send Ether. How to send Ether given this problem?

Mist downloads new blocks upon a restart, thus is able to receive Ether, but I'm currently unable to send any Ether from any of the wallets in Mist. I believe the issue is the lack of synchronization ...
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1answer
51 views

Synchronization: why startingBlock is ahead of currentBlock?

> eth.syncing { currentBlock: 908716, highestBlock: 928604, knownStates: 0, pulledStates: 0, startingBlock: 908891 } It looks like synchronization started from block 908891, though the ...
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2answers
171 views

What geth sync mode to use for a blockchain-explorer-like analysis

I want to do analysis of the ethereum blockchain in a manner similar to what blockchain explorer sites do to answer a few more general questions. I will need info on all addresses and transaction ...
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1answer
787 views

Geth Light Sync functionality

If I use the light version of geth sync, can I make a token & deploy contracts using that? The light client "gets only the current state", from that point onwards or everytime I query the ...
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1answer
274 views

Merkle tree child hashing process

Each non leaf node of a Merkle tree is just the hash of the concatenation of it's children. Does this literally mean stick the 2 hashes together or is there a more intricate process involved? i.e. ...