Questions tagged [infura]
INFURA is a scalable, standards-based cluster and API endpoint for Ethereum & IPFS.
281
questions
0
votes
2answers
17 views
Infura Json RPC: how to call a function passing parameters?
IMPORTANT
My final goal is receive data via api on a php server and use Infura to call my contract to save the data
Test Situation
having this test contract on rinkeby
contract test008 {
...
0
votes
1answer
24 views
how can someone use the smart contract deployed on Rinkeby network? what are next steps after successful deployment? [duplicate]
I am new to the smart contract and blockchain technology but learning step by step. I developed a small bidding smart contract in solidity. Using Truffle, NPM and Infura, I deployed it in the Rinkeby ...
0
votes
1answer
19 views
What is the data field in eth_call commands for USDT?
I'm trying to use eth_call to send USDT (TetherToken) from one account to another (Although I know that eth_call just simiulate such transaction). Everything is clear in this regard, just the data ...
1
vote
1answer
23 views
Infura getLogs returns an empty result
I'm writing a crypto based system with PHP on Infura, and now I am coding a script to retrieve logs for a specific address. This is my code:
$ch = curl_init($my_server_url);
$data = array(
'...
0
votes
1answer
29 views
How to create account using mnemonic words or private key in web3js and call contracts using that account
I have a simple React Project with web3@1.2.4 installed and I want to call a contract's method like this:
await maincontract.methods.CurrentMethod("arguments").send({ from: accounts[0]/*my account ...
0
votes
1answer
25 views
Infura node seems to crash when tryining to deploy contract
I am trying to deploy a contract and run some tests on the functions within it.
Here is what my code currently looks like:
package main
import (
"context"
"crypto/rand"
"encoding/hex"
...
0
votes
2answers
32 views
How to get new transactions by addresses?
I have an array of addresses on my server which I need to track. What method should I use to do that via websockets? I’m new to eth and cryptocurrency at all, and I don’t understand “blocks”, “gas ...
0
votes
1answer
24 views
Cannot read property 'then' of undefined
I am trying to send ether from one address to another. After executing the code I am receiving an error: Cannot read property 'then' of undefined. How can I fix this? Thanks in advance.
const Web3 = ...
2
votes
1answer
77 views
Web3py. Error getting events using Infura: “The method eth_newFilter does not exist/is not available”
I'm trying to get all events from contract, but get error:
"ValueError: {'code': -32601, 'message': 'The method eth_newFilter does not exist/is not available'}"
I'm using Web3py and Infura. My code:
...
0
votes
1answer
44 views
NodeJS + Web3 + Infura Ropsten - Error: Invalid JSON RPC response: “”
I have problem with invalid response to ethereum from BE NodeJS app.
I got error like:
Error: Invalid JSON RPC response: ""
Below I'd attached my simple code for testing connection.
const Web3 = ...
0
votes
0answers
24 views
Why does Infura Ropsten websocket filtering event timeout?
When listening events via Infura Ropsten websocket, web3.py implementation timeout while web3.js succeeds.
The demo can be cloned from --
https://github.com/jerryji/ropsten_wss_timeout_demo
After ...
0
votes
1answer
16 views
What is the client version?
I am using Infura and web3.py. When I connect to Infura the web3 object has a clientVersion property that reads this from JSON RPC
"Geth/v1.8.15-omnibus-255989da/linux-amd64/go1.10.1"
Can someone ...
2
votes
1answer
48 views
Error trying to get events in web3.py via Infura
I was trying to get all events from my smart contract (in Ropsten) via Infura node.
The problem is that I know that Infura does no support creating filters, but I don't know how to get events by ...
0
votes
0answers
34 views
How do you mint tokens on Compound Finance with Infura and Web3
I'm new to Compound and I'm trying to get minting/redeeming implemented in my app using Infura (Ropsten) as my httpProvider for Web3. I understand that Infura doesn't allow invocation of ...
0
votes
0answers
40 views
Infura API: getPastLogs times-out, even when there are less than 2500 records
I would like to receive all event logs for a particular topic of an event log. I know there is a limit of 10,000 records, but the getPastLogs function times-out when less than 2,500 records need to be ...
0
votes
1answer
16 views
AttributeError while trying to call a contract using web3py and Infura
I am trying to call a function from an already-deployed contract on the Ropsten network:
from web3 import Web3
infura_url = "https://ropsten.infura.io/v3/XXXXXXXXXXXXXX"
w3 = Web3(Web3.HTTPProvider(...
0
votes
1answer
33 views
Error sending ether to a a smart contract deployed in ropsten with web3 with python
I am trying to send ether to a smart contract deployed on ropsten via infura, but I am having some problems in txn.
The error is "Error in Txn: Reverted".
The sender account has enought ether to ...
1
vote
2answers
76 views
How to post to the blockchain without a third party API like infura
I have been using web3 nodejs and infura.io to build apps that interact w/ the Ethereum Blockchain and it is all great but I don't like the idea of a failure point my my apps because they rely on a ...
0
votes
1answer
38 views
Unlock Ethereum account via infura
I am trying to connect my wallet (Metamask) via Infura, but I receiving an error.
My code:
[HttpPost]
public async Task<IActionResult> LoginAsync([ModelBinder(typeof(AccountBinder))] ...
0
votes
2answers
26 views
Why use nodepools or backends?
I have a fundamental question about eth/blockchain infrastructure. I see several posts talking about the need for backend node infrastructure when launching a dapp/ smart contract. This infrastructure ...
0
votes
0answers
13 views
How to deploy contract using ropsten infural url and web3.py? [duplicate]
# web3.py instance
>>> w3 = Web3(Web3.EthereumTesterProvider())
# set pre-funded account as sender
>>> w3.eth.defaultAccount = w3.eth.accounts[0]
# get bytecode
>>> ...
2
votes
1answer
94 views
ipfs.infura.io for IPFS gateway and pinning
I'm using Infura API for initializing IPFS. IPFS uses garbage collector to clean 2 weeks old unpinned data in public gateway. So, if I'll pin my hash is it possible that IPFS will still delete my ...
0
votes
0answers
52 views
Events using Infura websockets on rinkeby Web3 1.2.1. Returned values aren't valid, did it run Out of Gas?
I am trying to do a simple event listener with NodeJS and Web3 using an Infura endpoint. I have the correct project-id
const Web3 = require('web3');
let web3 = new Web3(
// Replace YOUR-PROJECT-ID ...
1
vote
3answers
109 views
How do I send a transaction using web3.py and Infura?
I am using Infura to interact with the Ropsten testnet. I would like to send a transaction from one account to another, but the following code does not work:
w3 = Web3(Web3.HTTPProvider('InfuraUrl'))
...
0
votes
2answers
60 views
Could I use Infura to get the token details?
I went through https://infura.io/docs but not sure if Infura could allow me to read token details like owner, token Id, etc. I also googled on how to read token using Infura but to no avail.
Has ...
1
vote
2answers
40 views
Insufficient funds when transferring ERC-20 token using web3
I am trying to send an ERC-20 token on Mainnet using web3 v1.x and Infura. I get the error in the title while executing this code.
I have a balance of about 0.14 ETH
var provider = new ...
0
votes
1answer
41 views
Do I need to build my own Ethereum block explorer to read my own tokens and smart contract?
I'm new to blockchain. I find that Etherscan's UI/UX is too complicated for average person to use. I basically need my users to read my Ethereum smart contract transactions and to view their own ...
0
votes
0answers
37 views
Do send raw transactions consume extra gas as opposed to a send transaction
I would assume the portion of verifying the signature consumes gas. I'm asking this because it seems infura does not handle signed transactions and I have a getBalance Call that is failing.
I would ...
0
votes
1answer
129 views
getting full pending transactions from Infura
I use Infura to get all pending transactions from Ropsten:
web3.eth.subscribe('pendingTransactions', async (error, txHash) => {
let tx = getTransaction(txHash)
...
}
With this ...
0
votes
0answers
22 views
web3py Filter Contract Events
I am new to web3py and I am trying to filter the events of a certain ERC20 contract. I can successfully call the contract's functions, but I struggle with the events.
contract = w3.eth.contract(...
0
votes
1answer
70 views
TimeoutError when using Infura websocket with web3.py
When I run the following code sometimes it executes successfully, but most of the time it raises a concurrent.futures._base.TimeoutError. What can I do to fix this?
Here is the code:
infura_url_ws = ...
0
votes
1answer
40 views
Problems subscribing to infura via websockets
So I have a dapp that includes a node server, which I have got to work successfully using ganache, using this line:
web3 = new Web3(new Web3.providers.WebsocketProvider('http://127.0.0.1:8545'))
I ...
1
vote
0answers
41 views
How does getDefaultProvider work in ethers.js?
From the docs:
This creates a FallbackProvider backed by multiple backends (INFURA and Etherscan).
This is the recommended method of connecting to the Ethereum network
if you are not running ...
1
vote
1answer
60 views
Connecting to Rinkeby using Infura and calling a state-changing function from smart contract
So i have trouble using a smart contract on Rinkeby through infura as it gives an "extra-data" error, which as far as i have read, is due to Rinkeby being a POA testnet. There are suggestions of using ...
0
votes
1answer
133 views
How to connect with WebSocket with Web3?
Already referred web3 documentations and other Q-A for web socket connection. Currently using infura as provider.
0
votes
2answers
48 views
truffle migrate fails silently
I'm trying to deploy a truffle project to testnet. When I run truffle migrate --reset --network rinkeby --verbose-rpc, this is output:
You can improve web3's peformance when running Node.js versions ...
0
votes
1answer
122 views
Is there any working provider for Ethereum Classic APIs?
Provider used for Ethereum is Infura, but there is no any provider for Ethereum Classic.
Previously tested Ethercluster endpoint to access APIs for Ethereum Classic, not able to connect with Kotti ...
0
votes
1answer
18 views
Storing results on web3 call in JavaScript Object
Disclaimer: Terrible at Javascript
I am trying to loop through events and store the block number, to and from accounts in a Javascript object. I am not sure what I am doing wrong, but it isnt working ...
0
votes
1answer
33 views
Cannot connect to Infura
I recently registered to Infura and trying to connect to the Ethereum Mainnet using the command below ({MY_PROJECT_ID} is swapped for my actual project id)
curl -H 'Content-Type: application/json' \
...
0
votes
0answers
28 views
Infura returns block: null when query is for “block: null”
Sometimes, when I call getBlock('latest') function on my infura node, it returns block: null wh
1
vote
1answer
43 views
How to get events on android with infura?
I am developing an app on Android, but Web3j does not support events on infura ( Should I use Infura with Web3j for Event filter? ) .
What are the options, I did not find any alternative library?
0
votes
1answer
64 views
Web3 0.20 contract deployment
environment: Web3 0.20.7,Infura,node.js(backend)
Deploy contract with Web3 0.20.7
pragma solidity ^0.5.1;
contract Bang{
address holder;
address proxy;
constructor (address _holder, ...
0
votes
1answer
146 views
Error: Invalid JSON RPC response | ropsten.infura
I'm trying to deploy my contracts to the ropsten test network, but I get this error.
the message error :
C:\Users\acer\test>truffle migrate --reset --network ropsten
Using network 'ropsten'.
...
1
vote
2answers
114 views
How to get the miner address of a block with infura Rinkeby endpoint?
I've read some docs online that to get the miner/sealer/signer address of a particular block that runs with the Ethereum PoA/Clique consensus (the Rinkeby testnet for example), I need to call the ...
1
vote
0answers
215 views
Cannot read property 'type' of undefined - abi-coder
I'm creating a simple voting contract.
It is deployed with truffle and infura.
This is the contract code:
pragma solidity >=0.4.21 <0.6.0;
contract Voter {
struct OptionPos {
uint ...
0
votes
1answer
93 views
What's the difference between ipfs.infura.io vs ipfs.io
When saving ipfs hash, i find that ipfs.infura.io is x10 faster than ipfs.io.
If the public gateway (ipfs.io) has a negative impact on user experience due to its slowness, why people would use that ...
0
votes
0answers
148 views
intermediate value is not iterable
I try to construct a transaction with Node (11.4.0), ethereumjs-tx (1.3.7) and web3 (1.0.0-beta.55) and Infura.
Infura gives me '0x35b' for the nonce,
then I create the tx:
amount = 0.001;
nonce = '...
0
votes
2answers
94 views
Truffle migrate --network ropsten always runs development network
I am trying to deploy a simple contract to the Ropsten network using Truffle and Infura. I have set up the Ropsten network in the truffle-confug.js file but it seems truffle always uses the ...
0
votes
0answers
164 views
Why does the error Invalid response received: 403;?
Develop a java project to connect to ethereum blockchain and until now no error has been presented, but now this error appeared:
org.web3j.protocol.exceptions.ClientConnectionException: Invalid
...
0
votes
2answers
47 views
Cannot declare web3 object in JavaScript
When I try to declare a web3 object It's always undefined.
I'm writting in JavaScript and using Infura as my provider for the ETH mainnet. I also tried with a local blockchain instead of Infura, but ...
