Questions tagged [sepolia]
Use this tag to identify issues with the Sepolia test network.
116
questions
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15
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How to test my Dapp
I'm developing a Dapp "ETHome" in order to put in practice my skills got until now, so i've wrote some contracts and tested them using hardhat, then i started using ethers.js and react js ...
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1
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28
views
Ethernaut reentrancy question
It seems like the SafeMath occurs the error to solve this problem. Does anyone still able to compile this contract?
" Error: not found openzeppelin-contracts-06/math/SafeMath.sol "
- 133
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1
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19
views
Invalid value undefined for HardhatConfig.networks.sepolia.url - Expected a value of type string
the code is
* @type import('hardhat/config').HardhatUserConfig
**/
require ("dotenv").config();
require ("@nomiclabs/hardhat-ethers");
const { API_URL, PRIVATE_KEY } = process....
1
vote
1
answer
111
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How can I get the "official" WETH which is different from wrapping from Uniswap on Sepolia testnet?
I am trying to make a bid on some NFT assets. I have Sepolia ETH from faucets. I also wrapped the Sepolia ETH into WETH using Uniswap. However, Opensea doesn't seem to recognize that WETH.
This is the ...
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1
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39
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need some amount of ether for getting the fake ether to learn blockchain [duplicate]
actually i was trying to get the LineaETH on Linea Sepolia test network. when i visited Alchemy(https://www.alchemy.com/faucets/ethereum-sepolia) for same, it is asking for to have some amount of ETH ...
0
votes
1
answer
19
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VRF subscription sepolita testnet
i'm new on ethereum.
I followed the following guide:
https://docs.chain.link/vrf/v2-5/subscription/get-a-random-number
and everything seems to have gone fine.
but after 15 hours the process is still ...
- 11
1
vote
0
answers
60
views
Smart-contract works on local node and Sepolia but not Polygon Amoy
I have an ERC20 Token that I'm testing and I'd like to deploy on Polygon PoS.
I deployed it on Polygon Amoy and for example, every time I call the approve method, my transaction fail.
I then tested to ...
- 11
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0
answers
9
views
Baseuri structure
I'm testing on Sepolia a basic NFT contract where images and json is hosted on a centralized server.
The fact is that I still don't see my NFT images in Metamask. Is this because a testnet doesn't ...
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0
answers
24
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How to Implement Safe Core Security in a Smart Contract on Sepolia Network?
I am currently developing a smart contract on the Sepolia network and I want to enhance its security using Safe Core. I have some familiarity with basic smart contract development in Solidity but I am ...
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28
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Transaction 0x6a19aa91361ce2b93b7515962821540af2aab0ebff0fcdcb90ee252fbe64c107 is pending: true
Any insight into this?
I am attempting to deploy a smart contract using Go-Ethereum but it is pending forever until my context timeout.
In order to minimize the complexity I use a worthless contract.
/...
- 107
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vote
3
answers
798
views
Uniswap app on Sepolia testnet is not loading any tokens
'https://app.uniswap.org/add/ETH?chain=sepolia' is not allowing me to create any new Pools, or 'https://app.uniswap.org/swap' doesn't load up any possible tokens so swap.
I am connected with my ...
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votes
1
answer
85
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Requesting Sepolia Test ETH for Development [duplicate]
I am currently working on a smart contract project and need some Sepolia test ETH to deploy and test my contracts. Unfortunately, I have been unable to obtain test ETH from the available faucets due ...
- 1
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17
views
Docker compiled bytecode not equal to Remix deployed bytecode
Any ideas to what I can do to fix this?
I am using Go-Ethereum to compile a deploy a smart contract and the deployment just hangs.
The contract compiles and deploys using Remix on Sepolia.
The byte ...
- 107
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votes
0
answers
90
views
CORS error when loading WalletConnectModal profile
I'm struggling understanding why my React App fails to load the profile data from WalletConnectModal. On first click on the Button which calls WalletConnect open function, i get the following error:
...
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39
views
The deployed contract bytecode does not match the compiled bytecode
first some context, I am building a Go-Ethereum tool that can compile, deploy, verify and finally run some functions on the deployed contract on Sepolia. It works fine with the exception of the ...
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2
votes
0
answers
41
views
Node synchronization stopped
I'm trying to deploy the Sepolia RPС node, as if everything was fine, but the synchronization stopped.
Besu version 24.3.3
Configuration:
Network: Sepolia
Network Id: 11155111
Data storage: Bonsai
...
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1
vote
3
answers
6k
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How to get SEPOLIA TEST ETHER from TESTNET FAUCET without ETH balance in METAMASK account
I tried to get SEPOLIA TEST ETHER from various TESTNET FAUCETS.
But all of them require minimum ETH balance in my METAMASK account.
I dont have any ETH balance in METAMASK.
I tried.
https://www....
0
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0
answers
13
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sepolia faucet needed for my master thesis [duplicate]
anyone be kind to help me with 1 sepolia faucet for me finishing my master thesis project? thank you a lot
account:
0x6D10c5e67aDe3bc4ADDAeF07305f4EB8F33F026B
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votes
1
answer
32
views
ABI and BIN Files generated by solc and Etherscan verified code are not identical
I have a file that is composed of multiple imports, too much code to drop here so I will illustrate my question with a very simplified example.
My compilers:
$ abigen --version
abigen version 1.11.7-...
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0
answers
27
views
'Error :project ID request rate exceeded' on deploying contracts to Sepolia Test Network using command truffle migrate --reset --network sepolia
I have Ethereum Blockchain application(DAPP) using truffle framework with React as Frontend
I want to deploy my contracts to sepolia test network so I run
truffle migrate --reset --network sepolia
...
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votes
1
answer
148
views
Invalid API key sepolia network blockscout
I deployed a contract on sepolia network and I would like to verify my coin using hardhat.
npx hardhat verify --network sepolia 0x44ED9AB9F4Ab72e4b1aBfEBaDf5A942617B90D18
I created an API key on ...
1
vote
1
answer
288
views
Insufficient Liquidity after adding liquidity on Sepolia Uniswap V2
I created a token "TestMe" with 2 million tokens (18dec), minting the deployer address the whole stack. I used the "addLiquidityETH" function provided by uniswap router to add 500k ...
1
vote
1
answer
59
views
Gas estimation error when interacting with smart contract
I wrote a simple smart contract for bulk sending eth to multiple addresses on Remix
pragma solidity ^0.4.21;
contract PayMultiple {
function pay(address[] payees, uint values) public payable{
...
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0
votes
1
answer
42
views
Contract creation confusion -- Unsure when my contract was deployed
I deployed a contract on Fuji Testnet around 3 hours ago, the address is as follows: 0xDb3F493F9D4CdaaDA08E30957c59a0e01CfB2af0
I went to Snowtrace to check it out and received an expected record of ...
0
votes
1
answer
87
views
error staging test on sepolia testnet(1) Uncaught error outside test suite)
I'm trying to deploy a smart contract on the sepolia testnet ,so the contract is deployed successfully as seen on the etherscan ,but when im trying to test the contract with staging test by running ...
0
votes
0
answers
28
views
Trouble publishing contract source code in Brownie: ConnectionError 403
I'm encountering an issue while attempting to deploy a contract using Brownie and publish its source code to Etherscan. The deployment itself is successful, but I'm unable to publish the contract ...
- 11
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votes
1
answer
51
views
Why wagmi with react returns object with numeric keys when fetch data from contract?
I have the issue that when I use useReadContract with abi , address an function name i receive the data like this: [{result: {0: value, 1: value}}]. The question is why this is possible when I have ...
1
vote
1
answer
593
views
Full node on sepolia
I want to start testing my smart contract on an ethereum 2.0 testnet.
I know there are different node providers like alchemy or quicknode but using these services I can incurr in rate limiting.
The ...
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votes
1
answer
81
views
Capture emitted event with web3 v4.7.0
I built a guessing game using an web3 v1.3.0 and it worked great, then I found out that version was deprecated so I upgraded to v4.7.0.
The new code is expected to listen for an event:
event ...
- 107
1
vote
1
answer
137
views
Execution Reverted due to UniswapV2-Pair creation in constructor
I am new to Blockchain development, so bear with me.
I successfully deployed my first contract, but if I try to add a Uniswap V2 Pair creation inside the constructor, I always get the error "...
0
votes
1
answer
51
views
Connected to a proxy function but getting an error when I call the transfer function of the implementation contract
I'm currently working on a project where I can transfer USDC from my account to another directly, provided I have my provider and private key, programmatic. So I connected to a proxy contract on the ...
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2
answers
150
views
UniSwapV2 Testnet Support
As you may be aware, the Goerli Testnet has been deprecated, and furthermore, UniSwapV2 is not supported on the Sepolia Testnet. What would be the recommended solution?
Thank you in advance.
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97
views
Error: could not decode result data (value="0x", info={ "method": "retrive", "signature": "retrive()" }, code=BAD_DATA, version=6.11.1)
const fs = require("fs-extra")
const ethers = require("ethers")
const { JsonRpcProvider } = require("ethers")
require("dotenv").config()
async function main() {...
1
vote
1
answer
134
views
What is the different between transaction fee and gas price?
I deployed a smart contract to sepolia network https://sepolia.etherscan.io/tx/0x8b309fd585d6f0196dddc5754038e06ef9693f4fd852ec27b02c320a1bc725f5
From the dashboard there are two price, Transaction ...
- 306
0
votes
1
answer
286
views
Sepolia Smart Contract - Withdrawal function
I've deployed a simple wallet solidity smart contract on the sepolia test network, and trying to test withdrawals. The first two attempts succeeded but I run into an 'insufficient funds' error despite ...
0
votes
1
answer
93
views
Execution reverted - transaction mined but execution failed
I have looked at previous answers for this title but they don't seem to help me.
My contract contract is deployed and verified on the Sepolia test net using Remix.
This is the failed transaction
The ...
- 107
0
votes
0
answers
62
views
Doubt in uniswap v3 swap
swap doesn't working . Is there any mistake in my code ? I am using Ethereum sepolia test net.
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.20;
pragma abicoder v2;
import "...
0
votes
1
answer
35
views
Why is the gas fee shown on Ether scan is different than the transaction I sent?
I sent a transaction to Ethereum test network sepolia as below code:
const transaction = {
from: account.address,
to: contractAddress,
gas: 202419,
...
- 306
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votes
1
answer
172
views
Error when attempting to send SepoliaETH between two accounts in remix via smart contract with specific conditions: Cause of error -->undefined gas
I would like to use my smart contract to map a payment transaction from SepoliaETH from one Metamask account to another Metamask account. The conditions of a transaction limit and a recall function of ...
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0
answers
94
views
Transaction Error: Uniswap RouterV2 Sepolia Testnet
Im trying to swap WETH -> USDC in the Sepolia Testnet using Uniswap Router02 contract.
Firstly I minted 0.5 ETH from the Faucet then created a Python script that uses Brownie (had to add the ...
0
votes
1
answer
67
views
ZkSync Sepolia support?
we are currently developing a solution to tokenize billions of dollar of real world asset on ZkSync Era and we need add support for multi-signature scheme. I can see here that there is support for ...
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1
vote
1
answer
207
views
Sepolia - stalled on waitForDeployment
I use Hardhat and have some scripts to perform functions, such as deploy.
I've been using Goerli but have been aware that it is being shuttered, and also i've found the transaction fee to be high and ...
- 175
1
vote
1
answer
41
views
How does the Sepolia Test Network work?
How do Test Nets like Sepolia stay in operation? According to chat GPT hosting a node has no token or financial award so why do people do it?
In that case how are people supplying free faucets if ...
0
votes
1
answer
16
views
gas error on semaphore deployment
I'm using semaphore deployment doc for its's deployment and I have error for gas usage, but I checked everything and it's ok. also, it works with no problem in hardhat node.
command:
yarn deploy --...
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37
views
SafeProxy contract is not deployed on the current network
I am trying to send ETH from my safe wallet.
Safe address : 0x159bD467fafcfA348D2b5f357b23aA1d70E814A0
.proposeTransaction({
safeAddress: checksumSafeAddresss,
safeTransactionData: safeTransaction....
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2
votes
0
answers
93
views
Is something happening with Ethereum Sepolia (or Etherscan Sepolia)?
I have came across several strange behaviours in the past couple of days with Ethereum Sepolia:
While using Web3J in an application of mine, transactions are only processed in batches after a couple ...
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votes
4
answers
1k
views
Where to get various ERC20 token for Goerli and sepolia testnets
I'm trying to get a collection of erc20 tokens (weth, usdc, dai, wbtc) in a testnet either sepolia or goerli
- 191
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555
views
Etherscan Sepolia invalid API key
After yesterdays maintenance window I started to see Invalid API Key errors returned from the Etherscan Sepolia API endpoint. This API key I'm using was working before yesterdays maintenance, and any ...
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154
views
Error when using hardhat but changes made successfully onto smart contract, was able to see changes on etherscan
const [signer] = await ethers.getSigners();
const contractAddress = 'address...';
const contractABI = ["abi..."];
const existingContract = new ethers.Contract(contractAddress, contractABI,...
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votes
2
answers
67
views
MethodUnavailable(error) when shifting from Ganache to Sepolia Testnet
I previously used Ganche to deploy a solidity contract in python with web3py and it worked with given http provider & account details. But now I want to deploy the flask application that connects ...
