Questions tagged [nodes]

A node is a machine which is running an Ethereum client. It synchronises the blockchain with other nodes in the network, so that they all have the same definitive copy. A node is needed to send and receive ether and to executive DApps.

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ethereum node to setup with min space

i want to setup an ethereum node for my website to use. What is the min space I need? To save space do I need to use light node? Or even Better idea? How much space I need for light node or full node? ...
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How permanent is data stored in Ethereum?

Does it all depend on the availability of nodes? What if say there's 1 node left in Ethereum, will that node contains the entire blockchain?
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fail for read ethereum node base on leveldb.py

I installed leveldb base on python3.6.but when I using leveldb.LevelDB import path for files to be read. a error occered "leveldb.LevelDBError: Corruption: 3 missing files; e.g.: D:/downloads_by_geth/...
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Is it possible to use address you don't own while running ethereum RPC node (using geth)?

In other words, you start your own node and then somehow add accounts you don't own (aka - you don't have their private keys)? I'm asking because I wanted to make my own node exposed via RPC/...
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One smart contract deployed on 2 nodes will have same address?

Let's get creation of a smart contract address out of the way: The address for an Ethereum contract is deterministically computed from the address of its creator (sender) and how many transactions ...
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How to run 2 nodes simultaneously?

I created a Node 0 and exited before creating Node 1. Then I created Node 1. And using Admin API, I connected Node 1 to Node 0. Node 1 is up and running. How do I start Node 0 and sync it with Node 1?...
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Multiple Accounts on a single node?

I am a beginner and learning Ethereum. Can somebody please tell me if my understanding is correct? Q) There could be just 1 node running, but multiple accounts?
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Why can’t light nodes broadcast transactions directly?

Everything I’ve read about Ethereum thus far seems to state that light nodes are incapable of broadcasting/relaying/etc. transactions themselves. It is also my understanding that light nodes have ...
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Parity version while running

I'm running a Parity node in a docker container. I've installed it with docker pull parity/parity:stable some time ago. How can I know which version of Parity I'm running? (without stopping the node)....
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How does Geth query the blockchain?

This question has probably been already answered somewhere else but I didn't find anything on the internet so I'm asking here. I wonder how clients such as Geth query the blockchain to get specific ...
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How to get rid of inactive nodes in Geth

I am setting up a quorum network with Quorum-maker, which uses Geth. It is running at the moment, with three alive nodes. However, earlier I had attempted to create two other nodes, which failed. I ...
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How to programmatically check the type of Ethereum node/backend that I'm connected to using Go?

I'm aware that I can do this using CURL like so: curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"web3_clientVersion","params":[],"id":67}' https://the-node-ip-...
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Nodes from private network don't gossip

I have three Ethereum nodes created with Geth. Two of them are on my machine (MacOS) and the third one is running on a virtual machine with Ubuntu. Because I used the same genesis.json and also the ...
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Is latest block returned by eth.getBlockNumber fully processed

According to web3 docs, web3.eth.getBlockNumber returns the number of the most recent block. My question is simple. Is it safe to assume block's transactions and events are already in the node or ...
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Decrease the time between new blocks in Ethereum Development

I'm trying to create a DAPP (with docker-compose) which will require many transactions, and I am currently experiencing nonce problems with my Transaction Manager. However, I'm not looking for help ...
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What is the --force-sealing option in the parity for

Can someone please explain what the --force-sealing option is for? From the description I don't understand exactly what it's doing. I want to understand why it must be set if I want to get a pending ...
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Does nodes have maximum limit of transactions

Does geth/parity nodes have a maximum limit of transactions that they can have (in queue) after which they stop accepting transactions (or apply back pressure or something)
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Copy Geth full node onto external drive then continue syncing

My 1TB internal SSD on my mac doesn't appear to be enough for a full sync with state data. I know I can fast sync but I need full state data. I'm currently on block 5.2million and its at around 900GB ...
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How do I monitor 50k addresses for incoming ERC20 transactions?

I have a list of 50.000 Ethereum addresses which at any time may receive ERC20 transfers. I know I can create filters but I don't think it scales to send 50.000 RPC calls to an Ethereum node every 20 ...
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Can't catchup with Mainnet

16GB Linux, 512 GB SSD, mainly started for RPC purposes only. No mining activity. geth --datadir ./data --syncmode fast console --rpc --rpcport 8545 --rpcaddr "0.0.0.0" --rpccorsdomain "*" --rpcapi "...
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How do I list the running nodes with geth?

Is there a way to list the all nodes on my computer with geth command line, and maybe even see some status for them? (I'm new to go-ethereum, apologies if this is a noob question, but I cannot quite ...
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Different synchronization types

What are the different synchronization types for an Ethereum node? Which of them are client-specific (Geth, Parity)?
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Peers not syncing on PoA private network

I've got a private network with two PoA geth nodes, with each node running on a separate machine. One node has been running for some time (in instamine mode) and has mined 6909 blocks. I've just setup ...
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Is there any concern for the significant number of nodes being hosted on AWS/ cloud providers?

Just curious if there is any downside that many nodes are being hosted on cloud providers? For example Infura, which supports many nodes and provides a large portion of connections to Ethereum nodes, ...
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Geth losing transactions

I have a couple of applications running on an Ethereum Blockchain hosted on a VM. For some reason, every now and then, I find my VM rebooted... so my blockchain is turned off... There's no problem ...
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How to run geth for ropsten and mainnet in a same server?

Is it possible to run geth for ropsten and mainnet in a same server if I changed all the port for Ropsten node trying not to conflict the ports used in mainnet? For example, geth --rpcport 8546 --...
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Does a string message increase the gas usage of a `require` statement?

In solc 0.4.22 onward, it is possible to provide a string message containing details about the error that will be passed back to the caller (in require, assert and revert statements). Does the gas ...
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What is the username / node ID in an enode URL?

Looking at https://github.com/ethereum/wiki/wiki/enode-url-format and https://github.com/ethereum/go-ethereum/wiki/Connecting-to-the-network I can see that the enode URL includes some information ...
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How to mine a Empty Block or reject transaction?

How Can a miner can mine a empty block,reject honest transactions to be added into block ; does it mean we could tweak the miner client , if yes could someone tell how it is done and what are the ...
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What's the difference between the Parity-Ethereum and the Parity client?

If you open https://etherscan.io/nodetracker you can see that the second most prevalent Ethereum client is Parity-Ethereum followed by Parity. What is the difference between these two client types?
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Why is my geth node stuck on block 7130891?

My geth mainnet node (version 1.8.21) has stopped on block 7130891. Interestingly, eth.syncing returns false and eth.blockNumber constantly returns 7130891. It was working up until ~24 hours ago. ...
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How to specify node as a mining node or non mining node in geth

As in private network of ethereum there can be nodes who only do mining and the nodes who didn't do mining.so In geth when we create nodes,How to specify nodes that they are mining node or an non ...
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How to find all Ethereum nodes and list it?

Hi is that possible to find eth nodes and list it with some details? I want to do some metrics and service like ether nodes. they dont have an API.
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What to enter for NODE_ENDPOINT on blk.io explorer

blk-io/blk-explorer: https://github.com/blk-io/blk-explorer-free Hi, I'm relatively new to ethereum, and I am having difficulty implementing the blk.io block explorer (for my private ethereum ...
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How to install infura to a server runing ubuntu 16.04

Im setting up an exchange and came to the installation of ethereum using this document http://support.bitexchange.systems/support/articles/how-to-install-ethereum-in-your-server. The 'geth' command ...
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ETH NODE Sync issue - It first syncs, then slows down and falls behind

Geth server Info: 6 cpus, 18gb mem SSD: 450 GB (42%used) Geth Config is below. So we have been upgrading our server one after the other to hopefully resolve this issue... We are supporting an ...
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Is it possible to tell which node broadcast a transaction?

If I host my own node and send my transactions through this node, can somebody see that my address sends transactions through my pseudo-anonymous node? If yes, can someone set up a watcher that ...
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59 views

Looking for an Ethereum sniffer

I have been looking for a sniffer similar to Bitcoin P2P Network Sniffer (https://github.com/sebicas/bitcoin-sniffer) which could allow me to connect to Ethereum nodes and listen to blocks and ...
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Image and file storage in block chain

Is it possible to store a base64 image code as string in block chain? I know we can use IPFS or Swarm as a tool to store an image or a document, but if someone gets to know about the hash anyone can ...
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How to gather all addresses of nodes in a private network?

I am currently learning core-development in go-ethereum. I am a little weak with networking, RPC and connections. I am trying to write a function in my own consensus mechanism that gathers all ...
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How can I (efficiently) programatically see if I am on an ETH or ETC chain?

if i have 2 nodes, one ETH and one ETC, and I am writing a program to use these nodes, how can i determine which node I am using at any given time? the best i can come up with is to check a known ...
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how do I know which node picks up my transaction? in general, how is a node assigned to broadcast a specific transaction?

How do I know what node is broadcasting my transaction to the network? how can i get more information about this node? for example, how do i know if the node is a geth or parity node? does it matter?
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What possibly could go wrong if I leave my private blockchain node 30303 port open to public? [duplicate]

I have the following setup: All the nodes inside my cluster are talking to each other via 30303 port. When I want to talk to them, I'm using a Geth light client via HTTP JSON RPC port 8545. Only the ...
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Techniques to count nodes [duplicate]

What are the different techniques to count nodes in ethereum? ethernodes.org has a count of nodes, how can we verify if that is true ? Are there any other techniques to do similar counting. Can you ...
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Detecting nodes by an identity in Ethereum network?

According to this answer: (https://bitcoin.stackexchange.com/a/63657/41513) the following can be definition of a node: "A node is a computer that has a copy of the blockchain (or at least a part ...
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Two Ethereum Node (connected to private net) on Single PC: Node data write error .Synchronisation failed [duplicate]

Is it possible to create 2 geth instance on single PC? Both are connected the private blockchain? When I connect a node to the private blockchain,it must sync with the blockchain by downloading all ...
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No etherbase set and no accounts found as default

I am getting: "No etherbase set and no accounts found as default" when trying to sync my node using: geth --testnet --rpc --rpcapi db,eth,net,web3,personal --cache=1024 --rpcport 8545 --rpcaddr 127....
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Parity speed limitations

I have a question about the node limitation for mainnet. I want to send a lot of transactions at the same time (let's say 1k), on the ropsten network it queues every tx and send batches of 64 every 10 ...
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How can nodes fail

I am writing plans to support a parity blockchain cluster and need to determine guidelines for the DevOps team. What are the ways in which nodes can fail and back practice for handling these?
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“RPC error, your account is locked” when I try to deploy the last version of parity-bridge

I have already success to deploy the last version of parity-bridge (last month), but today i have pull the last version of parity-bridge. I have that on my terminal : env RUST_LOG=info parity-bridge-...