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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Fetching only last block geth

Is there a way to fetch only last block or last few blocks using geth? I just dont want to store whole blockchain because of the size. The goal is to retrieve all smart contracts that appears on ...
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How much it takes for all nodes to sync?

I think the title is clear. I wanted to know how much it takes for all nodes to sync on ethereum,binance and fantom network?
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What's the ancient folder in Geth?

I'm new to the nodes world and i'm trying to setup my own with Geth on Windows. I was wondering what the /ancient folder does for the Node. Please correct if i'm wrong, but synthetically this is what ...
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What does it mean when geth is repeatedly generating, aborting and resuming snapshots and unindexing transactions? [duplicate]

What does the repetition of the following five, sometimes six logs mean regarding the state of the geth client? Generating state snapshot Aborting state snapshot generation Resuming state snapshot ...
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Unable to sync rinkeby and unable to query eth.syncing due to lack of IPC endpoint

I'm trying to sync rinkeby with the go-ethereum client (geth 1.10.14-stable). I've been starting the process a couple of times and then interrupted it again, and started again and so on. Now, the ...
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Some json-rpc requests are not served by a possibly unsynced full node on localhost

I want to make some JSON RPC calls to my rinkeby node, which I have set up via: $ geth --rinkeby --http --http.api personal,eth,net,web3 --cache=4096 --http.port 3337 I seem to have problems ...
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How are nodes synced in ethereum?

I was wondering how ethereum nodes are synced and also if there is a formula for calculating this time? For example, if I wish to start running a new node, how is my new node synced with the ...
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"Head state missing, repairing" after private network crash. Any way to recover the blocks?

I'm running a small PoA private network (2 nodes, one signer, one for API purposes). Yesterday, the system both nodes are running on crashed due to an unrelated issue. As a result, both geth instances ...
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Sync from snapshot

I'm trying to do a sync on geth node from snap for 7 days, however that never ends. so That's filling up my SSD that has 3TB (currently It is using 76% from my SSD) and I think that's not normal my ...
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I updated my geth instance to 1.10.12-stable, but after update it is not syncing anymore

I updated my geth instance to latest stable version (currently 1.10.12). After it stopped synchronization. It loads new data, but the data is not synced. When I attach to geth console. Here is the ...
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Where does geth download it's data, the actual blockchain state?

We know that we can sync with current blockchain status with geth, for example, or any other similar things. If I run geth in console I can see ... INFO [11-16|22:27:56.602] Imported new block ...
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Latency between block production and data reception

I am trying to measure the latency between the block production (eg block.timestamp) and the data reception (eg Date.now()); I tried with different nodes (Infura, Amazon Managed Blockchain and my very ...
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Mining causes nodes to stop syncing on Besu

I am trying to test my private network by running multiple nodes at one time. I am using a config file that lists the boot node as well as the same genesis file. The boot node is on a linux server, ...
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Best way to get balances of multitude of addresses

I have a list/array/map of addresses. I want to keep track of their balances on the front end. Currently, the front end is calling the balanceOf() function for each address and updating based on the ...
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Can GETH run quickly and be always up-to-date with an AWS c5 instance?

I've noticed that most people who are using AWS to run their ethereum node are using the i3 (or i3en) instance type for its high I/O performance with the attached SSD. For my particular use case, I ...
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Private network desync

This is a similar to question to this one I have just setup 2 private nodes on AWS EC2 via geth, which are connected to each other, and have 1 "Hello World" smart contract already mined. ...
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Fastest way to download Ethereum state with geth?

I want to do some experiments that require that I access Ethereum state db. I have a standard laptop with SSD drive. From what I've read, synchronizing in "fast" mode may be endless on a ...
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Ethereum Geth never finishes sync, block OK, states past 1b, Debian VM Docker SSD

yes, I know this has been asked before, but it's got me stumped. I've build and run Ethereum nodes using Geth on Windows and RasPi 4 fine before. This time I'm using Docker on a Debian VM on and SSD ...
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Export aleth(ethereum c++) to geth (go-ethereum) blockchain data

I have the private aleth network, but want to test some new features, so I want to move to geth. But didn't find any instructions how to get it to work. Here is a couple of questions: Is it anywhere ...
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Does data in memory variables get added to the blockchain? How does consensus work for memory?

If a function call involves a memory variable, does the data in memory get added to the blockchain history? If no, how come others can validate the transaction? Is the data only deleted after a block ...
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Can I resume fast sync in GoEthereum?

I have synced whole geth into computer in --fast mode. However, it had to be stopped at one point today. Using the already downloaded data, can I pass the download phase and resume from where it is ...
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Transaction Wait Time - Full Node vs?

I need to record how long a transaction waits in the pending pool before being picked up by a miner. I have a solution to run a full node with maxpeers 1000 and record timings once the sync is ...
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Synchronisation failed, dropping peer peer=... err="retrieved hash chain is invalid: block in the future" in private geth ethereum network

Geth Version: 1.10.7-stable-12f0ff40 Operating system: Windows 10 Home I have created a Private Ethereum Blockchain with 2 nodes in seperated command prompts: geth --http --http.port "8085" -...
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State trie pruning and synching, how does that work?

how does state trie prunning works during syncing? or does pruning only happens on the nodes that is not the state root? since if state root are deleted then there will be errors in the blocks and it ...
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Can pending pool watched during fast sync

I need to record some statistics regarding the pending pool. I know I need to sync, and once it's done, I can record my experiments. Is it possible to sync in the fast option and still record ...
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Block sealing failed err="unauthorized validator"

I ran a validator/miner node with a snapshot from https://github.com/binance-chain/bsc-snapshots and the following cmd (after geth account import ...): docker run -d --restart=always -v /data:/root/....
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eth.getBalance returning 0 due to syncing problem in rinkeby [duplicate]

when I am running eth.syncing it is returning false and when I am running eth.getBlock("latest") it is returning number: 8290864, with some other data. Which is less than Block Height ...
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eth.syncing is falling behind

I lost internet connection for about 5 minutes and my full node was disconnected. At first it was about 500 blocks behind and looked like it was catching up. Now every time I check: eth.syncing....
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txpool.content return empty object

I opened a full node successfully (I succeed getting data from e.g eth_getTransactionByHash). I'm trying to get all pending transactions, but I get: > txpool.content { pending: {}, queued: {} } ...
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Local full node is one block behind mainnet after sync is completed

I just created a local Binance Smart Chain full node on my PC with the following specs: OS: Linux running on Windows Subsystem for Linux Storage: 1TB SSD (Samsung 980 Pro) CPU: AMD Ryzen 7 5800x Ram: ...
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High Block Validation

Suppose node A is running on height 2000. Node B sends to node A block with height 2002. Node A is not able to validate the block without having a block with height 2001. How does node A behave in ...
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Highest known block in the peer network - permissioned ethereum network

We are starting to define the best metrics to monitor a permissioned Besu network. One important point to monitor is the block height of a node and from other nodes in order to discover if the node is ...
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What should be done first: extract snapshot or create genesis?

bsc documentation describes a method of accelerating creation of a full-node using a snapshot. However, it is not clear in which order these commands should be executed and if it makes any difference: ...
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What's the reason at block says 0?

I am trying to setup bsc node following the official documentation. Here is what I have so far: Downloaded snapshot and extracted contents to /srv/node Wrote genesis state locally: geth --datadir node ...
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Work with local copy of Ropsten without syncing

I have used Geth to successfuly download (and sync) with Ropsten network. Is it possible to use downloaded blockchain (reading blocks with Geth) without syncing with Ropsten? I would basically like to ...
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Ensuring correct block order with subscribe on "newHeads"

I have an issue with processing new blocks through a WebSocket connection on a local node. Sometimes I receive multiple events with the same blockNumber but different blockHashes. I understood from ...
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geth: does --gcmode=archive require --syncmode=full?

I can't seem to find a straight answer to this question since snap is relatively new. I'm currently running geth 1.10.3 with --syncmode snap and --gcmode archive, but i'm beginning to think that ...
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Ropsten light node block number ~1000 greater than it should be

I'm running geth on Ropsten, using geth --ropsten --syncmode "light" --http.addr localhost --http.port 8545 --rpc My most recent block number is 10266786 (and increasing), whereas etherscan....
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Does verification of a world state require downloading the whole ethereum blockchain?

Lets say I'm a new node on the Ethereum network, I download a world state of 500 blocks ago and I download the blockchain from that point to present (500 blocks). Can I verify that the world state I'...
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Geth syncing, how to keep on par with the network in syncronized blocks

I am trying to get data from the last block via my own local node. I do this by calling the RPC API on my node. the issue I have is that the node is not fully synchronized and is never fully ...
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computer configuration for connecting eth 50 or more nodes

I'd like to rent a server to run eth client ,but I am not sure what the computer configuration should be?In my local pc ,I can only connect less than 10 nodes and failed in sync.If I want to connect ...
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RPC returns 0x0 after sync

binance smart chain v1.0.7 When new node complete syncing, RPC returns 0x0 values few hours.Can I fix that? Please help me
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Q: How long does table compacting take?

I was doing a full sync with geth 1.9.22-stable. The sync is paused and the blocks are stuck at sometime on April 15th. The log contains the following lines: 10:30:13.672838 table@compaction L0·173200 ...
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I can no longer access old blocks via RPC in full syncmode?

I have a private network based on geth v1.9.25. I upgraded from v1.8.27. Recently, I saw that I'm unable to access the previous blocks at all. Like, e.g. eth.getBlockByNumber(1) gives me null, even ...
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Ethereum network Sync up with Matic network

We are able to deploy our ERC20 token into Matic Network and it is working fine. But we have few questions here to understand how Matic works with Ethereum Mainnet Once the contract is deployed in ...
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Exactly what data does snap sync download?

Geth 1.10 introduces snap sync, faster way of syncing the blockchain. What data does snap sync actually download? If I run a snap sync with --gcmode archive will I end up with an archive node?
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Ethereum Bucket Synchronisation

The normal operation of Ethereum and other blockchains is to Store new transactions in a mempool, Distribute the bucket, and then mine contents into a block picked from the bucket based on priority of ...
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Unable to synchronize with Ropsten testnet with Geth 1.9.25

For the past two days I've been trying to synchronize with Ropsten testnet using the following command in Geth 1.9.25: ./geth --ropsten --rpc --rpcaddr="0.0.0.0" --rpcapi="eth, web3, ...
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Running --no-ancient-blocks on a synced node

I have an up to date OpenEthereum node that is taking a long time to sync it's ancient blocks, Which has left it syncing a batch of ancient blocks, while falling behind, then syncing up to date. Put ...
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When the ETH node receive a new block ,which will be verified?

I know that when a node receives a transaction, it can verify the RLP format, transaction signature, gas and account nonce value, but I don't know when the node receives a new block, whether will it ...

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