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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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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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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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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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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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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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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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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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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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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What prevents the blockchain from being poisoned by copyrighted or illegal data?

It's possible to store data in smart contracts, and with the recent explosion of NFTs this is happening a lot. A couple of hundred kB is more than enough to encode copyrighted material - e.g. the text ...
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Without a block explorer API, can I programmatically determine if an address has a contract deployed at it (eg using Web3 or call to a node)?

Given an address, from a web application I'm attempting to determine if there's a contract deployed at the address. There are some ways to do this with etherscan or other block explorer APIs, but I'm ...
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Connecting a geth node over LAN to a public geth node on my network

I need to run 2 geth nodes on separate computers on my network (ethereum Mainnet). I understand that I could connect them both to public peers the regular way over the internet simply by changing the ...
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Geth/Parity node - When is a new block imported

Based on my observations and also on block-timestamps-vs-received-timestamp, I suppose that a block "n" is imported into geth or parity node, only after a block "n+1" is mined. Is ...
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How to manage nodes and accounts in private (permissioned) networks

I would like to create a private/permissioned blockchain to allow for data exchangement between a number of organisations which are known (and trusted) upfront. Moreover, multiple employees per ...
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Risks of smart-contract code metadata caching in Ethereum node

When checking implementation and performance profile of Besu node, I have noticed that certain metadata about contract code under given address is not cached - on every execution of the contract, it ...
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scheduling of smart contract functions

I am reading the alarm clock documentation http://docs.ethereum-alarm-clock.com/en/latest/ but there are things I don't understand. I have a dapp where the smart contract has different functions. For ...
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Is Ethereum actually something that exists, or is it just a maze of webpages full of nonsense? [closed]

I'm trying to be as polite as I can be, as I have nothing against Ethereum specifically. I'm very experienced with Bitcoin, but have never found any other "altcoin" to be worthy the time of ...
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differences in terms of api supported by full node vs light node

Are there any differences on the API supported by full node vs light node in Ethereum?
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What node(s) does Ethereum broadcast a transaction first? How is it determined?

When I as a user make a transaction, where or what node(s) does it get sent to first? How does an Ethereum node, in terms of implementation details, determine that? Does it send a new transaction to, ...
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Trying to run a Rinkeby testnet node on windows

Im trying to run a light node om windows, it works until here: geth --datadir=$HOME/.rinkeby init rinkeby.json but when I type this: geth --networkid=4 --datadir=$HOME/.rinkeby --syncmode=light --...
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Is light mode client able to serve JSON-RPCs?

Can Geth sync in light mode server JSON-RPC queries from DApps? I know light nodes only store block headers but will it forward the JSON-RPC to other peers to get it served?
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Is there a Ethereum mainnet node that I can query txpool APIs?

I want to call txpool APIs of Ethereum mainnet but I found Infura doesn't provide that. Is there any service providing txpool JSON-RPCs?
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How can my decentralized web application hosted on a cloud application (like AWS) interact with a contract deployed from my localhost

I have a decentralized web application that is hosted in the cloud. I recently deployed a smart contract to two different test networks Ropsten and Goerli - my contract deployed to the Ropsten ...
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Retrieving very old events

While working with Infura in the past, if I remember correctly, I had troubles with retrieving events from old (non-recent) blocks. Does the trouble (not only with Infura but with other popular ...
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Archival node from a certain block or for certain addresses

does anybody know if it's possible to run archival from a certain block or only for transactions interacting with a list of contracts? I recently deployed some contracts for which I want to run graph ...
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What does IP address 127.0.0.1 mean in enode URI?

enode is the URI for an ethereum node, consisting of node-id-in-hex@ip-address:port. Here are 2 enode examples: enode://...
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How to add ethereum node to already existing blockchain without knowing genesis file?

Target : i want to add new node to already running blockchain. Correct, if i am wrong for adding node to network. two node's should have same genesis block. if genesis block have different values then ...
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How to ensure the authenticity of the block header obtained by the light node

When I join the Ethereum network, I ask for block header data from neighboring nodes. How can I guarantee the reality of data?What if the neighbors conspired to give me bogus data?
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What happens when you submit the same transaction to multiple providers?

Suppose I sign a transaction locally using eth_sendRawTransaction of an implementation (web3js, web3py etc.), and then send the same signed transaction to multiple providers like Infura, Alchemy and a ...
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How to parse the node information in the nodes directory by leveldb?

I want to get all the node IP addresses of ETH, so I need to parse the geth/nodes directory, but I can't find the specific data format and cannot parse it. I found a same problem, but there is no ...

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