Questions tagged [connections]
The connections tag has no usage guidance.
54
questions
0
votes
1answer
50 views
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:
...
0
votes
0answers
104 views
IPC Connection not work on Node.js (web3)
I have a geth node launch on linux, I want to access it through the IPC connection in a Node.js application.
I am getting this error :
/home/**/node_modules/web3-core-helpers/lib/errors.js:66
...
0
votes
0answers
30 views
TypeError: web3.isConnected is not function
I coded the below program:
var Web3 = require("web3");
var web3 = new Web3(new Web3.providers.HttpProvider('http://127.0.0.1:8545'))
console.log(web3.currentProvider);
console.log('...
1
vote
1answer
91 views
How to force geth to use ipv4 instead of ipv6
I'm trying to configure geth on Redhat7 and facing an issue while connecting nodes from the two servers.
There are three validator nodes on each machines and ports(30303, 30304, 30305) are allowed. ...
3
votes
1answer
202 views
How to set multiple nodes in HttpProvider web3 v1.2.0
I'm working with Nodejs application, and using a multi-node setup on different servers.
If I have single node end point like http://localhost:8545 I can use Web3 providers as below
var web3 = new Web3(...
0
votes
0answers
36 views
ERR_SSL_PROTOCOL_ERROR while connecting private blockchain
I'm working with private blockchain, and facing some issue with SSL configuration.
The system has two components:
The private blockchain that is configured on the VM.
The web application that ...
0
votes
1answer
48 views
net.peerCount is zero: Two miners are not connected
I'm trying to build a local private blockchain of Ethereum in my own PC using Geth v1.9.15-stable-0f77f34b. I have installed Geth in a virtual machine with Ubuntu 18.04 OS using VMware Workstation Pro....
0
votes
1answer
354 views
How to connect to my private ethereum network using web3?
I have setup my own private eth network. I wanted to connect to this. So first I have run
geth --datadir ./tolotolo --networkid 1115 --port 30304 console 2>>myEth.log
It generated geth.ipc ...
1
vote
0answers
28 views
Simple way to balance web3j connections between nodes
Context:
I have a client that can connect to 3 local-network nodes to distribute query-loads and be more resilient to network/software issues. I have managed to create a -simple- watch-dog with a ...
0
votes
0answers
80 views
Truffle test using multiple connections
I am running a test which involves sending transactions to a smart contract from multiple nodes. Right now, I have seperate truffle folders in each node, with a test file that sends the transactions ...
0
votes
2answers
63 views
simulate multiple connexions to the ethereum blockchain on a unique PC
How to simulate that i have several connections to the ethereum blockchain(line in red in the picture)? what tools can i use to do this?Geth?
the goal is:
Sent requests or simultaneous transactions ...
0
votes
1answer
1k views
Error: The data field must be HEX encoded data
I am trying to make a simple dApp by using a tutorial. I am using the following command ;
npm install ganache-cli web3
so that we can use web3 to get fake ethereum nodes/accounts by connecting it ...
0
votes
1answer
435 views
Can't connect to localhost:8545 while using ethereumjs-testrpc web3?
I am developing a simple Voting dApp by following a tutorial. In this tutorial
we are using npm install ethereumjs-testrpc web3 so that we can get the fake nodes of Ethereum.
For that i first ...
3
votes
1answer
285 views
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 ...
0
votes
1answer
120 views
Have a connection problem with smart Contract using web3.js
Anyone that can help me in how to interact with our smartcontract
using web3.js.
I tried below code but this not work:
This the code that I am using:
if (typeof web3 !== 'undefined')
{
web3 = ...
0
votes
1answer
157 views
Configuring geth so that it can only connect to my private local blockchain?
Basically I would like to know how to configure geth so that it can only connect to my private ethereum blockchain that is hosted on another machine?
Many thanks in advance!
1
vote
1answer
151 views
Web3 Empty Object Server Side in Meteor
Created new --bare Meteor project (release 1.8).
Used meteor npm install --save web3 to add web3 to the project from npmjs.org.
In code server.js use:
Web3 = require('web3')
console.log(Web3) // ...
2
votes
0answers
373 views
“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-...
1
vote
1answer
378 views
CONNECTION ERROR: Couldn't connect to node when trying to connect to ropsten
I have Metamask installed on chrome and am connected to the Ropsten test network through there. However, whenever I try running my Javascript, I get the following error: CONNECTION ERROR: Couldn't ...
1
vote
1answer
3k views
MetaMask cannot connect to “localhost 8545”
When I choose localhost 8545 in MetaMask, apparently it is not able to connect. Please see screen shot:
I tried with several internet connection, however the same result.
Whereas, I can easily ...
0
votes
1answer
394 views
How to connect not local node to private Blockchain?
Is there any way to connect NOT LOCAL node to running private Blockchain?
So, there are 3 virtual machines in one local network. They are syncronized private blockchain. They have static-nodes.json ...
4
votes
3answers
2k views
Is there a way to make geth only allow connections from specified nodes?
I'm setting up a private network with 10 geth nodes for my organization's own use, however I don't want outside nodes to accidentally (or intentionally) connect to our geth nodes. The nodes are hosted ...
0
votes
1answer
209 views
Using node in local network as provider
I am using web3js, I've set up an ethereum node in my network in a laptop via mist, now I'd like to run a web3js script that uses that node as provider;
var PROVIDER = "192.168.1.40:8545" // I've ...
1
vote
0answers
121 views
Node connection timeout function?
I am trying multiple avenues to find out why my nodes in a private blockchain are losing connectivity over the course of about 18 hours.
So this question is:
Is there a part of the discovery ...
2
votes
1answer
447 views
Parity PoA chain not receiving transactions
I'm trying to set up a single node proof-of-authority chain. I am using Parity v1.7.7 and have the following config file:
{
"name": "LocalPoA_7545",
"engine": {
"instantSeal": {
"params"...
3
votes
0answers
115 views
What would cause nodes on a private blockchain to gradually lose connectivity?
I have a private blockchain with 6 nodes, and a total of three miners. When I initialize the blockchain everything looks great and the nodes find each other starting with the bootnodes.
After about ...
1
vote
1answer
193 views
Private Blockchain - Nodes Lose Connectivity
I have a private blockchain (using Parity) where initially, all the nodes talk to each other, but over time (usually 9-18 hours) they lose connectivity until they all drop off and have zero peers. ...
1
vote
2answers
868 views
Do nodes need to have static IP addresses to connect to a private blockchain?
A private blockchain on Ethereum:
When we want to add more than one nodes, e.g. two nodes A and B, to a private blockchain, we let node A add the other node: admin.addPeer() and node B call A. Both ...
0
votes
2answers
216 views
Can you run two blockchains locally?
I am trying to run two blockchains for experiments, trying geth with different ports, network IDs and folders for chain data directories does not work. How can I do this?
All help is appreciated!
0
votes
2answers
227 views
EthereumJ connect to private node
I need to connect to private ethereum node with using ethereumj without ethereum.conf file. I need configure connect from code using Spring Framework.
3
votes
2answers
232 views
Can I reboot my router while geth fast syncing?
dumb question from noob here. I have started to sync with command geth --fast --cache=1024 for more than 3 days now, and I am still not finished syncing yet (still around 1 million again). Somehow I ...
0
votes
1answer
367 views
Problems of connections with we3.providers
I'm using the web3 API and i'm defining the web3 instance, setting a provider like this:
if (typeof web3 !== 'undefined') {
web3 = new Web3(web3.currentProvider);
} else {
// set the provider you ...
3
votes
0answers
201 views
How do you connect to a node from the server side of a meteor app
This is the command I am using to run the node (a private testnet)
geth --networkid 420 --nodiscover --rpc --rpcaddr "0.0.0.0" --rpcport 8545 --rpcapi="db,eth,net,web3,personal,web3" --rpccorsdomain "...
4
votes
1answer
398 views
Connecting to an ethereum node from meteor server side
I get the error TypeError: XMLHttpRequest is not a function when I try to connect to a node on the server side of my meteor application.
The error is caused by meteor using the meteor HTTP package ...
1
vote
0answers
608 views
How does Mist connect to Ropsten?
I have both Mist and Geth installed. One note though; Mist uses (is bundled with?) Geth 1.6.0 whereas I have Geth 1.6.1 installed.
When I type > geth --testnet --fast console, I fail to sync the ...
0
votes
1answer
1k views
How to connect to the Private BlockChain in Azure consortium
How using Web3 in geth client to conect to the private blockchain
when i use
var web3 = new Web3(new Web3.providers.HttpProvider("
http://alexyy73n.northeurope.cloudapp.azure.com:8545"));
So ...
2
votes
1answer
1k views
How to run JSON rpc with parity server?
I use a VPS where I want to run parity to synchronize the blockchain.
I use this command :
parity --chain frontier.json --rpcapi="eth,net,web3,personal,web3" --rpc --rpcaddr ipAddressPub --rpcport ...
7
votes
1answer
3k views
How can I create connected multiple blockchains?
I want to create multiple private blockchains over Ethereum testnet, which need to be somehow connected. Is it possible to have a node on private blockchain that is connected to the another node on ...
2
votes
0answers
713 views
Connect to node via IPC
As per my knowledge, RPC connection to a node is quite unsafe. so the alternative is connecting to a node via IPC. But how to connect to node via IPC?
I have used web3 for connecting to node via RPC ...
asked Dec 13 '16 at 6:22
Prashant Prabhakar Singh
6,6874 gold badges29 silver badges55 bronze badges
2
votes
0answers
259 views
Connection between two blockchains
I am looking for an approach to creating a connection between two blockchain-networks.
I found out that I can use oracles to get data from extern systems (= second blockchain-network). But how can I ...
6
votes
1answer
816 views
peers keep connects and disconnects into private Ethereum blockchain
I have two servers that are connected into local private ethereum blockchain successfully and they do mining as well. After few minutes one of them disconnects and after that it re-connects again and ...
1
vote
2answers
887 views
Nodes from two different networks not operable on a private blockchain
This is how my setting looks:
H2 and H4 are on separate networks. They have private IPs and not routable from outside the network. How do I make these two systems as peers so that they operate on the ...
1
vote
1answer
68 views
Why aren't the peer-to-peer connections transitive?
In a private blockchain network, if there are three nodes - A, B, and C
A is connected to B
B is connected to C
But, why is A not connected to C?
Wouldn't that make the connections and ultimately ...
3
votes
1answer
177 views
What's the point of having static nodes when IP addresses keep changing?
In the <datadir>/static-nodes.json file, we can mention the enode URI of a node that we want to re-connect to, in case of a connection failure. Assume A is a static node which has been rebooted. ...
4
votes
2answers
215 views
Difficulties to start Ethereum json RPC
I installed Ethereum on VPS and I have two accounts.
After I installed Ethereum on my mac where I have one account.
For now I'm on testnet network.
I want to connect to VSP accounts from mac ...
0
votes
1answer
1k views
How to connect to node?
I installed Ethereum on a VPS.
When I connect on the VSP, with the command line I can send transaction.
Now I want to do the same thing from a local script.
I think I must use JSON RPC, but I ...
4
votes
0answers
510 views
Unstable connection between peers on a private network
I created a private net, I've been trying to connect two Ethereum nodes because I need one of them to mine the transaction made by the other. The two nodes are on different machines and networks. I ...
-1
votes
1answer
3k views
I'm having a problem connecting to pools
I can't get my miner-worker to connect to any pools. I can get my reported hashrate to show on the pool site but it always says "0 workers". My miner always shows hashing and getting work packages. I'...
1
vote
2answers
705 views
Add peers into a private blockchain network?
I have created a private blockchain network on windows OS by using two cmd console.
I am following this link in order to setup a private network.
Steps:
geth --datadir="d:/tmp/eth" -verbosity 6 --...
1
vote
0answers
86 views
Ethereum Wallet can't sync - wifi issue
I'm newbie having a few Eth issues, to begin with:
Trying to run Ethereum Wallet 0.8.0 on my x64 linux my internet connection becomes intermittent. If a ping is left running (say 8.8.8.8), when the EW ...
