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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How does a new node register in the network? [duplicate]

I am just trying to get into the topic of Etherium and Blockchain and currently I do not understand the following. Etherium network is decentralized p2p network. But if I start a node, the 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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Simulating a transaction's state change without writing to the blockchain

I'm trying to simulate a transaction to observe the state change and events that will be emitted, before sending the transaction to the blockchain. I'm interested in all the internal calls and state ...
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Switching from Full to Fast Syncmode in Geth

I have been syncing my node for about 3 days now and am only at 39%. I assume part of that is my internet speed, and specs. However, I am wondering if I can pause geth, switch the service to use --...
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How does ethernodes.org discover nodes?

I am running my light-client at the moment and wanted to know, how does ethernodes.org discover nodes? And is it possible to get discovered using a light node? Thanks in advance!
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Is it possible to verify a node is running remotely?

I am trying to run many different nodes remotely and I was asking if it were possible to verify they are running remotely. Is it possible to verify a running Geth-node remotely? Thanks!
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The Ethereum node gives an error and writes off all funds

Colleagues, hello! Help me understand and solve the problem with the ether node. We execute a request in our node with the following code eth.sendTransaction ({from: '...
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Benefits of using Light Nodes, if you already have a Archive / Full node at your disposal?

I might have asked this question in the question i posted yesterday, but i realized that this would be better off as a separate question. So assume you have a really powerful PC/Server Machine (let's ...
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Are pure functions and events verifiable/guaranteed

I am very new to solidity so please forgive me if I'm mistaken, but it seems that pure and view functions are not really run on chain if I access them with web3 (but they are if I access within a ...
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When we say that a 51% control of total computation power could lead to a successful Sybil attack, do we refer to miners or nodes?

As per my understanding of the blockchain so far (Bitcoin and Ethereum) nodes and miners have different jobs to do in a blockchain network. Although the terms are extensively used interchangeably, ...
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How to use NodeReal's Meganode service in BSC Testnet?

This question seems even a bit stupid to me, but I read in Binance documentation about Nodereal, and they state in their documentation about Meganode service, the following: Supports mainnet and ...
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How does a smart contract "run on a blockchain" under-the-hood?

I'm quite new to the blockchain technology and I would like to understand a few concepts for which I couldn't find an in-depth explanation online. All the resources I examined so far explain the ...
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Question: Multiple Node connection, primary purpose to keep a full node in sync

Goal: Build a Full Ethereum and BSC node, deploy other full nodes in different geo-locations with the primary purpose to feed the Main full node with the fastest and up to >second data. Reasoning: ...
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Getting a could not detect network error when I try to connect to a Hardhat node which is connected to Alchemy

I have set up my project following these guides (in order): https://hardhat.org/getting-started/#overview (the installation part) https://docs.uniswap.org/sdk/guides/using-ethers (the first steps ...
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Does a geth light node verify transactions before sending them on chain?

I have a geth light node running locally , i used to use alchemy but now i use geth, however i noticed alchemy json rpc fails and doesnt submit the transaction when something is wrong , whereas my ...
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Send transaction from accounts of different node

I am running a private blockchain using geth. I have 3 nodes A,B and C and each node has its accounts. So if I connect via RPC to node A. when I send a trasnaction from nodeA_user 1 to nodea user 2 it ...
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bsc node fast sync : diff layers too new from current

I'm trying to do a fast resync of my node running on a 36gb ram, Ryzen 9, nvme ssd. But now i have an error but can't find anything on it... ERROR[10-28|11:29:47.644] diff layers too new from current ...
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I am trying to addLiquidity on Uniswap v2 but I am getting error Reason provided by the contract: "TransferHelper: TRANSFER_FROM_FAILED"

function addLiquidity( address tokenA, address tokenB, uint amountADesired, uint amountBDesired, uint amountAMin, uint amountBMin, address to, uint deadline ) external ...
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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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Connecting Metamask to local geth node RPC only works on Chrome but not Firefox

I'm trying to connect to my local geth node RPC from my Metamask in Firefox, but it always gives the following error under the "Chain ID" field: Could not fetch chain ID. Is your RPC URL ...
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chainlink request to cancelChainlinkRequest

I have been on this to test how requests will be canceled. i go this error the has of the transaction here: https://testnet.bscscan.com/tx/...
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Is Chiliz a sidechain? How to get transactions from it?

Suppose I want information about some ERC20 token. I run Ethereum mainnet node of my preference, load all events of ERC20 token of my interest with eth_getLogs, and do whatever I want with that info. ...
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What if all nodes dissapear?

I know this may be a dumb question... And I know this is a very unlikely scenario... but I want to know. What if all the nodes from ethereum network dissapear? The transactions would stop being ...
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55 views

How to edit minium link payment as a node-operator

Been running a node, and I notice the payment in configuration settings is not editable, how do I figure that out, also am not seeing the Oracle balance in link increase and it debiting the user using ...
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Running chainlink node on google cloud and accessing the node server as an operator

I was able to access the localhost:6688 when I was running the node server, so whenever I closed the console the server will go down, so I decided to detach it by installing sleep now the server is up ...
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Running 1 node at the same time for 2 persons

I was wondering, if I use a private node from ankr or quicknode can the same node be used at the same time by two different persons?
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Run Ethereum node with custom requirements

I want to run my own Ethereum Mainnet node. I need it for an analytics system that will need to query blocks that are at most 24 hours old. I don't care if the node syncs regularly during the day - I ...
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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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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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fundamental node privacy

I am trying to learn about the enode concept, the node addressing system that Ethereum clients use I seem to recall in passing that Ethereum transaction propagation has some degree of privacy because ...
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158 views

Is my node's sync speed normal?

I'm running geth in a docker container. Params are --http --http.addr 0.0.0.0 --http.api --ws --ws.addr 0.0.0.0 --ws.api eth,net,web3 --graphql --metrics Node has been up an running for about 4 days....
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Moralis.Cloud.beforeSave not triggered when adding tables through a sync job (plugin)

I ran into this a while back and it was doing my head in. Could it be that a ‘Moralis.Cloud.beforeSave’ in Cloud Functions is not triggered when adding tables through a sync job (plugin)? When I run ...
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419 views

Geth light node returns 0 pending / queued transactions despite being fully synced. Cannot reasonably access tx-pool data

The two following commands are inputted into the Javascript live console, but return identical results from HTTP requests (whose methods appear slightly different). The node is fully synced as ...
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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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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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381 views

Is there a way to learn interacting with the mempool without having to run a full node?

this link mentions grabbing a free endpoint from quicknode: https://www.quicknode.com/guides/web3-sdks/estimating-gas-price-using-pending-transactions-in-python I followed the link and made an account ...
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Fund an address and send a tx in a single block

Take the following situation 0xb... doesn't have any ethereum 0xa... send ethereum to 0xb... on block x with gas price y+1 0xb... make a transaction with a smart contract on block x with gas price y ...
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Delay from web3 provider Infura in receiving new block headers

I use web3 in NodeJs to subscribe to 'newBlockHeaders' and use https://infura.io/ as provider. Holding the output of my app side-by-side with https://ethstats.net/ and comparing block numbers, there's ...
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How to use Web3.WebsocketProvider for continuously receiving the last block from own Node in Python

I use python 3.7 and own Node. So i want to receiving every last block from own Node immediately after it was mined. from web3 import Web3 WEB3_WS_URI = 'ws://node_url:8546' w3 = Web3(Web3....
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826 views

Geth bsc node install problem

I'm trying to install a bsc fullnode, i'm following the bsc tutorial (https://docs.binance.org/smart-chain/developer/fullnode.html). But i ran into a problem. At the last step when i launch the node ...
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751 views

Is it possible to run bsc node with minimal config (especially low disk storage)?

I have a vps with 8vCPU, 16GB RAM and 160GB SSD. Is it possible to setup a bsc mainet node even if the official documentation (https://docs.binance.org/smart-chain/developer/fullnode.html#fullnodes-...
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980 views

Can a Binance SmartChain / BSC full node be run on Windows?

If Geth is available on Windows, shouldn't that mean it's doable, or am I misunderstanding how it works? I was under the impression that Geth is essentially the node software. Is that not so?
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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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Query ethereum chain without owning a node

When I want to query the ethereum blockchain I use infura server with a curl command like this: curl https://mainnet.infura.io/v3/2a8c33bac50647a6be2638a92f9d4a4c -X POST -H "Content-Type: ...
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Is running a light Ethereum node in a local server a good solution for not having to pay a 3rd party provider?

I've been looking into some providers for Ethereum blockchain data via web3 and the prices might get a little bit crazy. How feasible is to run light node in a local server to use it on my code ...
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Likelihood of malicious nodes in a shard

in his post https://vitalik.ca/general/2021/04/07/sharding.html, V. Buterin said: “Certainly, they can wait until they get lucky and get 51% in a single shard by random chance despite having less than ...
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How do I change cors domain of geth metrics?

I am trying to connect the output of geth metrics of a local node to Grafana. I am initializing my node using the following geth command: geth --datadir "n1" --nodiscover --networkid "...
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4k views

Problem with BSC full node

I try install full node Binance Smart Chain (https://docs.binance.org/smart-chain/developer/fullnode.html). I follow all the instructions on the site. After the command geth --config ./config.toml --...
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ERROR: null value in column "next_nonce" violates not-null constraint (SQLSTATE 23502)

I am using this command to run my chainlink node: docker run --name chainlink-kovan --network host -p 6688:6688 -v ~/.chainlink-kovan:/chainlink -it --env-file=.env smartcontract/chainlink:0.10.3 ...
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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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