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Questions tagged [infura]

INFURA is a scalable, standards-based cluster and API endpoint for Ethereum & IPFS.

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Signing Ropsten transactions with

I am trying to sign transactions using the Web3 HDWalletProvider package and an infura API. I am using the following code: const Web3 = require('web3'); const Web3HDWalletProvider = require("web3-...
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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 { ...
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25 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 ...
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20 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 ...
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24 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( '...
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31 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 ...
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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" ...
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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 ...
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28 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 = ...
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1answer
79 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: ...
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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 = ...
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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 ...
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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 ...
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1answer
54 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 ...
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35 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 ...
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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 ...
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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(...
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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 ...
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78 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 ...
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1answer
42 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))] ...
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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 ...
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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 >>> ...
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1answer
99 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 ...
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58 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 ...
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3answers
112 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')) ...
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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 ...
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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 ...
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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 ...
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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 ...
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133 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 ...
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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(...
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72 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 = ...
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1answer
43 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 ...
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42 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 ...
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1answer
62 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 ...
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1answer
135 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.
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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 ...
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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 ...
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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 ...
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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' \ ...
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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
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1answer
45 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?
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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, ...
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1answer
147 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'. ...
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2answers
115 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 ...
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221 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 ...
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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 ...
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153 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 = '...
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2answers
95 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 ...
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181 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 ...