Questions tagged [network]

a network allows computers to communicate and exchange data

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How i can send my Ethereum from kovan test network to Ethereum main network

I have Ethereum in metamask which is in kovan test network so now I want to withdraw them so I want send Ethereum in Ethereum main network so I send to any crypto application
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How do clients and nodes download their data from the decentralised network?

I have always just take it that the nodes and clients will download the data from the "network". The full nodes will download the entire blockchain state while the light clients will ...
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How to establish a private network using nethermind client?

So I have 5 ubuntu 20 nodes on a single network with sudo access. I want to spin up a private Ethereum network using nethermind client (not geth). How one may do such a thing - where to start is there ...
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Term of winning mining [duplicate]

I'm new to the ethereum network and read official documents on the site(https://ethereum.org/). But,I could't find out the term of of winnning mining like getting leading 4-zero or 6-zero hash. Before ...
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How to add all the EVM chains to brownie?

I am able to add particular RPC url for that particular chain for eg. Binace Smart Chain to brownie using "brownie networks add". But I want to multiple networks to brownie, how can I ...
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Question about finding token addresses to insert into a .sol Contract function

Ok so I have a .sol Contract that is trying to find arb between 2 dexes I'm utilizing the Kovan Test Network - this is the function function estimateDualDexTrade(address _router1, address _router2, ...
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How do I make my own ethereum 1 and 2 network

I would like to run both ethereum 1 and ethereum 2 within a private network. Any ideas on how to do this? By private network I do not mean just on my system, but I mean being able to run the clients ...
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Adding a peer to a local ethereum node created with the --dev flag

I have created a node using the following two commands: geth --datadir --http --dev --http.corsdomain "https://remix.ethereum.org,http://remix.ethereum.org" --networkid 1234 -allow-...
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How to change chainID of avalanche local network

I am using avalanchego to set up a local private network in EC2 Server ChainID of my network is 43112. How do I change chain id to something else?
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Funds sent to Safe Wallet but on Different Network that Gnosis have not built

I have opened up a Safe Wallet for multisig purposes but the network the wallet was created on is not the same network that the funds are being sent on. The network is called Nova Network : Chain ID ...
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Does an Ethereum Node need to be accessible from the internet?

Suppose I want an Ethereum/BSC node running on my network using GETH. I want to be able to access the node and run any sort of API calls against via Web3 from a locally running software. The node has ...
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Node crashed during syncing. It was about 34 000 blocks but now node restarted from begining

Running a private ethereum blockchain (meaning not main net) with just one bootnode and 2 full nodes. My A node was about 34 000 blocks with all data. The node B was syncing but now, after a crash of ...
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How the broadcasting happen in Ethereum network?

However, this question seems to be primitive but I still couldn't understand how transactions are routed in the peer-to-peer network of Ethereum in the way that if not all, at least most of the nodes (...
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How does a node know the consensus and reconcile the differences?

There are a lot of similar questions like this, but I could not find satisfactory answers specific to my questions. 1.Purely from a single node's perspective, how does it know that the block it ...
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how to deploy the smart contract in brownie

Error: Final argument must be a dict of transaction parameters that includes a `from` field specifying the address to deploy from Terminating local RPC client... smart contract: pragma solidity ^0.5....
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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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raise ValueError("Explorer API not set for this network") ValueError: Explorer API not set for this network

I run this code in brownie: brownie run scripts/deploy.py --networks Rinkeby deploy.py: from brownie import network, config, accounts from brownie import FundMe def deploy_fund_me(): account = ...
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7 votes
1 answer
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How to ask the metamask user to switch its network?

Some web3 enabled websites ask you to switch your network on metamask. How can I do so? Some other websites also allow you to add a network you don't have (for example https://chainlist.org/). I would ...
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How to know if i can connect to a network?

I deployed to Rinkeby, when I connect to Rinkeby everything is ok, but if I change the network (for example Ropsten), I am getting an error that is ok as well because my contract is for Rinkeby. my ...
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Understanding performance optimizations of View Functions

First I understand that view functions cost no gas and they are run locally on the node that gets the call. I am curious about practical optimizations of view functions. To make things simple maybe a ...
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3 votes
2 answers
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Network ropsten doesn't show in metamask

Why I can't change the network to Ropsten Test Network? It doesn't show up in pop up menu.
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Will my node receive relay transactions only after the synchronization is completed?

I am a graduate student in a university, and my research direction is blockchain security. I want to study these relay transactions to find out if they will leak privacy. I want to deploy an Ethereum ...
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truffle migrate unknown network

I am using $ truffle migrate --network development but the compiler returns Compiling your contracts Everything is up to date, there is nothing to compile. Unknown network "development". See ...
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i accidentally send usdt-trc20 into the usdt-trc20 contract itself... is there any way i could get it back?

In tron network, I have mistakenly send USDT token to the USDT contract (TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t). Is there anyway I could get my fund back? Thanks!
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Access control in ethereum

Can you let some nodes in ethereum network have only view access while others can to mine blocks and add them to blockchain? Can the miners be authorized nodes only?
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Ethereum sent to Trust Wallet using unsupported KCC network

I sent Ethereum to Trust from Kucoin using the KCC network which is not a supported network by trustwallet. When i look up the transaction on the blockchain, confirmations are still rising? Is there a ...
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1 answer
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What type of validation happens in transaction propagation?

I am reading the Mastering Ethereum book and came across this piece: On average, each Ethereum node maintains connections to at least 13 other nodes, called its neighbors. Each neighbor node ...
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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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When we send transaction to a network we only send the signature of the transaction then how is the miner able to decrypt the message?

When we send transaction to a network as shown below we only send the signature of the transaction then how is the miner able to decrypt the message? If only the signed transaction is sent to the ...
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Trying to add new peer using admin.addPeer

Ive been trying to set up a local network using geth, and keep getting the following when i try to use admin.addPeer: > admin.addPeer("enode://...
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Embedding metamask or a wallet on a network in a webpage

just a random thought. Is it possible to embed a wallet on a network in a webpage? Sort of like moving part of metamask and making it a permanent built-in module in a webpage. This way, users do not ...
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I'm connecting to the wrong network but my configuration seems right

Trying to run truffle console I got this typical error: I've checked my configuration and it seems OK to me (I don't know why truffle is trying to connect to 127.0.0.1). Here you can see my project: ...
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3 votes
1 answer
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Getting LINK for Ropsten network

I'm trying to get LINK for Ropsten. I'm using this faucet: https://ropsten.chain.link/ and, when I've added the new token, I've used this address 0x20fe562d797a42dcb3399062ae9546cd06f63280 (Chainlink ...
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Experimental data on transaction propagation time

Does anyone have empirical data on how long does it take to propogate a transaction thought out most of blockchain? I know we can speculate on how long it would take (like here). But I am interested ...
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1 vote
1 answer
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How is 172ms block propagation possible?

Here you can read that avg block propagation time is 172 milliseconds till it is shared all over the blockchain. How is this even possible? You can clearly see that reaching some locations takes much ...
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2 votes
1 answer
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How to get events from a contract deployed on different network? - Web3

I have contract A in Avalanche FUJI C-chain. When I'm on C-chain testnet, I can get events from A using getPastEvents() in web3.js, but when I change the testnet (for example, to Goerli), I receive an ...
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Is there a need of network additional security measure

I didn't find information about the risk and threat of being connected to the Ethereum network / internet. I was wondering if we would need additional measures such as a firewall, proxy to protect ...
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Fictitious use case to send confidential data

I am designing the network architecture of a Fictitious agency that needs to send confidential data. So my questions are: Is it possible to send images through the Ethereum network? I've read that, ...
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Throughput and Latency of Private Ethereum Network

How do I calculate Throughput and Latency of a private Ethereum network that I have set up locally on my computer? I tried the solution given in Measuring transaction latency and throughput in a multi ...
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1 answer
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Truffle test doesn't connect to Ganache

I'm using Truffle and Ganache for my development environment. Using the truffle console or truffle external scripts everything works fine, but truffle test does not seem to be connected to Ganache: ...
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RPC connection fails

I launched my geth with those parameters : sudo geth --syncmode "light" --cache=2048 --datadir /mnt/ssd/ethereum --pprof.addr 0.0.0.0 --pprof It's running on a ubuntu server 20 on a ...
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Rough estimates of transaction propagation latency?

Does anyone know any rough numbers for transaction propagation currently for the Ethereum network? I.e. how long does a submitted transaction take to reach 50%/95%/etc of nodes? Thanks!
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3 votes
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Firewall blocks interactions with geth peers and it is not clear how to fix it

Input: geth on port 30303 port 30303 forwarding is enabled on router uPnP is disabled on router UFW firewall is enabled with the following rules: $ sudo ufw status verbose ...
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2 votes
1 answer
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How large network traffic is expected for Ethereum 2.0 Staking node?

Would be interested what can be rough estimated network costs of running full staking client. For staking it's currently required to run: Eth1 node (Not counting initial sync which require initial ...
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6 votes
1 answer
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What is the computing power of the Ethereum network in FLOPS?

The aproximate computing power of current Bitcoin network in terms of FLOPS (FP32) has been estimated at about ~80,000 exaFLOPS and being aware of the limits of the analogy because of the widespread ...
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Why does ip address value differ in the enode url from the info output of a geth node instance to running admin.nodeInfo.enode in the js console?

I'm in the process of creating a private Ethereum network. I am able to successfully connect nodes on my local machine but unable to connect nodes in my LAN or outside my network. When I run a geth ...
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2 votes
1 answer
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What happens if two different states of smart contract conflict?

I'm newbie studying blockchain and Ethereum. While I'm studying, I've got a question. What will happen in the case of conflict of two different states on smart contract, e.g. from the network ...
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Ethereum peer to peer load balancer

Is there any existing TCP load balancer product that is enode aware?
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Where are "pending" (newly submitted) transactions stored?

First of all, my terminology may be off, sorry about that. I understand how a blockchain holds data on transactions that have been "accepted" (i.e. a block has been mined). But if I decide to ...
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What is Fuse.io for?

I read that Fuse.io is a DPoS blockchain on the top of Ethereum, apparently to improve payment performance. What is Fuse? What is its purpose? If it is on the top of Ethereum, how payments may be ...
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