20
votes
To which remote ethereum nodes does Metamask plugin send signed transactions? and are they exposed to denial of service attacks?
1) INFURA (https://infura.io/) maintains those remote nodes.
2) You can trust those nodes for two reasons: Uptime and Relay of signed transactions (as opposed of keeping your private key in our ...
- 2,381
15
votes
The best Web3 providers online
Over the past year, many teams have been busy building infrastructure services to better support the ecosystem. There are now a number of options available to developers - which is fantastic for the ...
- 251
15
votes
Accepted
Is there an Infura equivalent for BSC?
If you are looking for a fully managed third party RPC provider for BSC, you can use:
Quiknode
Ankr
If you want complete chain data, you can use their snapshots
- 1,919
14
votes
Accepted
Connecting to hosted web3 provider from NodeJS backend
I've replaced
const web3 = new Web3(new Web3.providers.HttpProvider("http://rpc.ethapi.org:8545"));
with:
const web3 = new Web3(new Web3.providers.HttpProvider("https://ropsten.infura.io/TOKEN"));
...
- 4,298
14
votes
Accepted
Infura web3 provider for Events (.get & .watch)
Infura currently doesn't support WebSockets (required for events using Web3 v1, otherwise you get the error "The current provider doesn't support subscriptions" when using infura as HttpProvider), so ...
- 5,163
14
votes
Accepted
How to connect to the Ropsten test-net using web3.js
You can either run a local node and specify your chain using --chain ropsten when starting geth/parity and connect to localhost once sync is completed or you can connect to infura.io:
var web3 = new ...
- 436
13
votes
Accepted
Truffle + Infura on Mainnet: Nonce too low error
If you're using Truffle with Infura directly (which it sounds like you are, although it's unclear why you mention MetaMask), you need to be aware that Infura is running on a server farm. If you submit ...
- 1,110
12
votes
Infura web3 provider for Events (.get & .watch)
I have been using Infura with web3 1.0 in mainnet. Here is my code, hope it helps
var Web3 = require('web3')
var request = require('request');
var contract = require('truffle-contract')
var ...
- 1,237
12
votes
Accepted
Error: "The contract code couldn't be stored, please check your gas limit"
How did you get the bytecode? Does it have the '0x' at the beginning?
Can you try adding the '0x' when submitting the transaction?
.deploy({ data: '0x' + bytecode, arguments: ['Hi there!'] })
If ...
- 30.6k
11
votes
Elegant way to detect current provider int web3.js
This my current implementation:
getCurrentProvider() {
if (!window.web3) return 'unknown';
if (window.web3.currentProvider.isMetaMask)
return 'metamask';
if (window.web3....
- 357
10
votes
To which remote ethereum nodes does Metamask plugin send signed transactions? and are they exposed to denial of service attacks?
more concretely metamask is connected to those infura's nodes :
const MAINET_RPC_URL = 'https://mainnet.infura.io/metamask'
const ROPSTEN_RPC_URL = 'https://ropsten.infura.io/metamask'
const ...
- 18.8k
10
votes
Accepted
How to connect to infura and deploy contract use web3.pyïĵ
As of v4.2.1, deploying a contract with a local key is a lot more straightforward.
From the question's example code, here is a new approach:
w3 = Web3(HTTPProvider("https://ropsten.infura.io/v3/...
- 6,381
10
votes
Why does sendSignedTransaction return a tx hash BUT does not post to the Rinkeby network (React, Metamask, web3, infura)
This line ...
nonce: window.web3.utils.toHex(window.web3.eth.getTransactionCount(fromAccount)),
... relies on a reliable transaction count from Infura. The problem is it's not as reliable (or even ...
- 55.2k
9
votes
Accepted
Running Mist with INFURA
To run Mist using INFURA, you need to start it from the command line
If you are using OSX, this is the command you want
/Applications/Mist.app/Contents/MacOS/Mist --rpc https://ropsten.infura.io
...
- 2,381
9
votes
Accepted
How to properly set nonce in a web3 contract invocation?
Apparently there's a nuance with the nonce... my error was I was setting the nonce to web3.eth.getTransactionCount() + 1, which left a gap between prior transaction nonce and next transaction nonce (...
- 561
8
votes
Accepted
Can not send eth on Ropsten using Infura node
This looks mostly correct, but there are a couple optional tx parameters that might make the difference:
// EIP 155 chainId - mainnet: 1, ropsten: 3
chainId: 3,
gasPrice: "0x9184e72a000", // ...
- 2,626
8
votes
Issue in websocket connection with infura using web3
I don't want to get a "golden shovel" reward or something but that question doesn't seem to be very old. I managed to successfully implement automatic reconnect thus I wanted to share the code:
First ...
- 91
8
votes
How to use infura API with web3 js?
First, import web3 as such:
const Web3 = require('web3')
Then instantiate a variable (in my case web3) and set a provider:
const web3 = new Web3(new Web3.providers.HttpProvider('https://mainnet....
8
votes
Accepted
WebSocket connection dropped in Web3.js with Infura
I hope someone from Infura would comment the specifics when they terminate a connection.
However, the latest Web3.js has autoreconnect feature:
https://github.com/ethereum/web3.js/releases/tag/v1.2....
- 22.3k
8
votes
Single Call vs MultiCall
In some cases, you might need to gather synchronized data from the blockchain. A good example is querying token prices from Uniswap. You don't want to have the price for one token from block x and a ...
- 181
7
votes
How to login with web3 without MetaMask?
What you should do in this case is use the web3-provider-engine. An example code snippet functioning with a custom private key and Infura API URL (Or even TestRPC) would be the following:
//Provider ...
7
votes
Accepted
Best possible way to launch the ethereum mainnet node on AWS
Here's what I am using:
AWS Instance Setup New EC2 instance
Ubuntu Server 16.04 LTS (HVM), SSD Volume Type - ami-10547475
t2.large: 2 vCPUs, 8GB RAM
250 GB (currently about 60gb is being used)
nginx ...
- 2,326
7
votes
Accepted
Getting "replacement transaction underpriced" though not trying to replace a transaction
You can indeed change the nonce by hand; it is a transaction parameter and it goes alongside gas, gasPrice, value.
So your script can simply increment it then fire and forget the transaction.
Now, ...
- 7,376
7
votes
Accepted
Web3py. Error getting events using Infura: "The method eth_newFilter does not exist/is not available"
The issue is that Infura only exposes the eth_newFilter endpoint via websockets, but you are connecting via https.
Try using a WebsocketProvider when declaring your web3 instance, as shown in the ...
- 2,876
7
votes
Accepted
Advantages of Infura over Ganache?
Ganache and Infura are two very different things.
Ganache is a tool for quickly creating a local network that can be used for development. It can be used to automatically run tests, etc. completely ...
- 6,017
6
votes
ethers.js Why aren't logs filtering? (query returned more than 10000 results)
Yes, I was filtering the logs very wrong. Let's look at this amazing oopsie from the code block above:
const logs = await provider.getLogs({
fromBlock: process.env.DEPLOYMENT_BLOCK,
...
- 2,749
5
votes
Simplest way to integrate Infura with a Web3/Truffle app?
Here's a example of setting an infura provider using truffle-hdwallet-provider with a custom wallet:
const HDWalletProvider = require('truffle-hdwallet-provider')
const fs = require('fs')
const ...
- 5,163
5
votes
Accepted
Retrieving logs using filter is not working?
You can find an open issue in the Infura Git
We're working on finding a solution to this which can provide the functionality createFilter/getLogs was providing in a way which is scalable and secure....
- 9,673
5
votes
Accepted
Truffle + INFURA for deployment
INFURA nodes are public and receive a lot of traffic, and that is the reason that some JSON-RPC methods need to be disallowed. However, we're working on a solution that will make all methods available....
- 476
5
votes
Can not send eth on Ropsten using Infura node
Can you try printing out the raw serialized transaction and sending it to ropsten directly with CURL?
https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sendrawtransaction
Do you get a txid back?
Only top scored, non community-wiki answers of a minimum length are eligible