Questions tagged [testnets]

testnets are an alternative blockchains to be used for testing and development with no value attached

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Seeking testnet and wallet for students to learn how to use ethereum?

I have a class on finance and have been trying to make it relatively painless for students to learn about getting a wallet, Ethereum address, learn about transaction hash and block, etc. Unfortunately ...
artiefufkin's user avatar
1 vote
1 answer
18 views

NFT Not Show In Opensea Collection Profile

I am trying to buld ERC721 to my NFT. But the NFT not show in NFT opensea profile Collection. I am using openzeppelin library and the basic project is using Hashlib labs. The skenario is when i mint ...
angga danar's user avatar
0 votes
1 answer
296 views

jsonrpc":"2.0","error":"[ethjs-query] while formatting outputs from RPC '"transaction underpriced\"

I'm trying to deploy a BEP20 contract using Remix on Binance TestNet, but I keep getting this error: creation of TToken errored: Returned error: {"jsonrpc":"2.0","error":&...
mazagngy's user avatar
1 vote
0 answers
37 views

How do I fix Error: Deployment Failed on ganache?

I am encountering this error while deploying my smart contract on the Ganache blockchain, can anyone help me fix it? Error: *** Deployment Failed *** "Coffee" hit an invalid opcode while ...
kaustubh sharma's user avatar
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2 answers
121 views

Sepolia Testnet

I am using Sepolia testnet to work and develop my dapp. I created the contract and deployed to the Sepolia network. I will be making several transactions in this similar manner. I know it is possible ...
111Seven's user avatar
-1 votes
1 answer
28 views

how can i deploy my Dapp?

what if I have deployed my smart contract on truffle and used ganache to deploy the same and i havn't used any test network, so if I go to deploy it on netlify to demonstrate the same will it work??
kaustubh sharma's user avatar
0 votes
0 answers
74 views

Sushiswap Router Contract Address on Sepolia Public Testnet?

I'm trying to interact with Sushiswap on the Sepolia public testnet, and I already found the Uniswap Router contract address. However, I can't seem to locate the Sushiswap Router contract address for ...
Ibrahim Khalil's user avatar
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0 answers
69 views

Error with Sepolia Faucet - ReCAPTCHA not Recognized Despite Correct Completion

I am facing an issue while using the Sepolia Faucet provided by Alchemy through sepoliafaucet.com. Every time I try to access the faucet and complete the ReCAPTCHA, I encounter the error message, &...
Ibrahim Khalil's user avatar
0 votes
1 answer
90 views

"Uniswap: Insufficient liquidity for this trade." when adding liquidity through contract

I am trying to create an Uniswap v2 liquidity pool for my token with custom tax fees (0x0AeE891A17e570Eba92A9138dB45DA2ecFAd7082) on Sepolia. To create the pool and add liquidity the function ...
root's user avatar
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0 answers
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How do I add Sepolia Testnet to Trust wallet

I linked my Trust wallet to Chainlist to 'get access' to Sepolia Testnet. And I transferred some Sepolia ETH to the address, but it is yet to reflect in Trust, despite etherscan confirming this ...
Chibyke_py's user avatar
0 votes
1 answer
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How can I get randomNumber from chainlinkVRF?

this is RandomNumberConsumer.sol // SPDX-License-Identifier: MIT pragma solidity ^0.8.7; import "@chainlink/contracts/src/v0.8/VRFConsumerBase.sol"; contract RandomNumberConsumer is ...
Tomas Wolfgang's user avatar
0 votes
1 answer
11 views

Why Cic testnet transaction cost is high?

I was testing my smart contract on cic testnet but the transaction cost for a simple transaction like updating the string was asked for 65 cict how to resolve this issue?
Anwar's user avatar
  • 51
1 vote
3 answers
246 views

Using Goerly Testnet for development requires 0.001eth in wallet [duplicate]

Using Goerly Testnet for development requires 0.001eth already existing in the wallet. I tried alchemy's and quicknode's sites but same requirement. Which faucet should i use for my first O.OO1 eth ...
Vocci's user avatar
  • 23
0 votes
1 answer
137 views

Subgraph indexed network is missing from manifest

i tried to deploy many times and got this errors messages. ✖️ Failed to deploy to Graph node https://api.thegraph.com/deploy/: subgraph failure::Subgraph indexed network is missing from manifest
Horus Cash's user avatar
0 votes
2 answers
424 views

How can I bridge ETH to zkEVM Testnet?

I want to get some ETH in Polygon zkEVM Testnet network. How can I bridge it and from which network should I do it?
Falcon Stakepool's user avatar
0 votes
0 answers
14 views

Request testnet ETH and LINK tokens for the Sepolia testnet [duplicate]

I am trying to get a sepolia test link from faucets.chain.link, I have inserted my wallet address, I have selected the Request type (0.1Eth), I have verified that i am human; But the send request ...
ndifreke Etukudo's user avatar
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0 answers
21 views

add faucet to metamask failed [duplicate]

I am using meta mask for the second time and I wanted to add some test ethers in my meta mask from test ether faucet in order to deploy my own smart contract implemented using remix. Unfortunately, ...
RAHMA TRABELSI's user avatar
0 votes
2 answers
1k views

Ethereum test network for Uniswap

I need to test my contract with Uniswap and I'm facing difficulty in using test networks of Ethereum. For example, the Goerli faucet wants us to buy actual Ethereum on the mainnet. Besides that, is ...
Fariha Abbasi's user avatar
0 votes
1 answer
579 views

Loolong for tusdt faucet Sepolia [closed]

Found only one but it is not working . Can anyone please point out a working one. Thank you
Shah's user avatar
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1 vote
1 answer
127 views

How to convert testnet BTC to WBTC?

How can I convert my test BTC to WBTC so that I can then communicate with EVM Ethereum?? Should I use a particular DEX over others or are there methods that already exist in the bitcoin libraries out ...
AlexCav's user avatar
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2 votes
0 answers
56 views

How to build a ethereum private chain after the Merge?

I want the build an ethereum private chain that similars toward the exsiting ethereum network. But i find there were not any documents about how to build the ethereum private chain after the Merge
frystal's user avatar
  • 21
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1 answer
67 views

TestNet ETH Disappear after receiving it immediately

Whenever I get any Testnets (Sepolia or Goerli) to my MetaMask Its Immediately transferred away from my wallet to another address 0x000ED96F3C5636BBB1A4fa59B96C2CCD042e5000 without any of my ...
Salma Sameer's user avatar
1 vote
2 answers
2k views

Where can Developers get Sepolia Testnet ETH? [duplicate]

Where can web3 developers get free Sepolia Testnet ETH to use in their development process?
anataliocs's user avatar
1 vote
0 answers
15 views

Creating a local ETH2 environment for testing L2 solutions

I'm developing a Layer 2 network that runs on top of current Ethereum and has to do a lot with staking. run controlled local testnet incl beacon and staking. deploy smart contracts What is the ...
yosher lutski's user avatar
0 votes
1 answer
49 views

How To Do Bulk Transaction with USDC(AVAX)

I am trying to make a bulk transaction using USDC (AVAX). I saw that it was recommended to use transaction builder. But the directions to use it was unclear to me. i was hoping that someone could help ...
Raphael's user avatar
0 votes
1 answer
63 views

What is the size of Polygon Mumbai chain in GB?

I want to know the total size of the chain because I am running a The Graph Node on an EC2 instance and I have to allocate resources to that.
Falcon Stakepool's user avatar
2 votes
1 answer
82 views

Metamask Unity Plugin shows different Ethereum amount for user confirmation on Metamask mobile wallet than that requested by Unity

I am integrating the MetaMask Unity Plugin given here: https://assetstore.unity.com/packages/decentralization/infrastructure/metamask-246786 and followed the docs provided here: https://c0f4f41c-2f55-...
Naruto Ujumaki's user avatar
1 vote
1 answer
424 views

Transfer eth from one goerli account to another

So, I sent from one goerli testnet account to another: https://goerli.etherscan.io/tx/0xa1a6a53ef3b7e54b5dd58e1f6983b0ab06bf6a2301ba2155e869ce1a77347b9e But the eth did not show up on the intended ...
EmilyJ's user avatar
  • 137
0 votes
1 answer
414 views

Deploy to Sepolia Infura Foundry: Solidity Scripting

I'm trying to deploy my contract with Foundry Solidity Scripting to Infura on the Seoplia test net. But Im getting this weird issue that appears to be related to the Infura API Key (formerly Project ...
currenthandle's user avatar
0 votes
1 answer
18 views

Remix not connecting to testrpc

I am trying to deploy a smart contract on testrpc using External Http Provider which I have learnt has replace web3 provider. However when I try to run it. It says 'Error while connecting to the ...
luko's user avatar
  • 1
5 votes
1 answer
3k views

Free Goerli testETH? Why is there a Goerli faucet shortage [duplicate]

Anyone else struggling to get Goerli Ethereum? Feel free to use Alchemy's free goerli faucet - goerlifaucet.com. You can use this faucet to get more testETH every day. We created it because we ...
Alchemy Devs's user avatar
0 votes
1 answer
401 views

i experienced a "code=UNSUPPORTED_OPERATION"-error while learning how to code

Error: cannot override "wertgesendet" (operation="overrides", overrides=["wertgesendet"], code=UNSUPPORTED_OPERATION, version=contracts/5.5.0) guys i am receiving this ...
nazo beyli's user avatar
0 votes
2 answers
172 views

Where to get testnet Eth? [duplicate]

Where do you get testnet Eth now that Ethereum has moved to POS? All the faucets I used to use no longer work.
John5544's user avatar
0 votes
1 answer
169 views

Deploy contract to goerli infuria without signing the transaction

Is there a way to deploy a contract on goerli infuria, using web3.js and metamask so I don't have to sign the transaction, or is it possible to use metamask to sign it, without having to provide the ...
Daniel Reed's user avatar
0 votes
0 answers
39 views

my full node isn't detecting any transactions or events in the testnet

So i'm trying to run a full node on my linux vm and made a js script that detects transactions on BSC Tesnet and print them basically a transaction tracking bot but the bot isn't receiving anything i ...
Axel Tn's user avatar
0 votes
2 answers
86 views

Is it possible to use zkSync in Polygon Mumbai?

I am setting up a project using zkSync and I am seeing that, in the hardhat.config.ts file, the supported network is zkSyncTestnet. hardhat.config.ts import "@matterlabs/hardhat-zksync-deploy&...
Falcon Stakepool's user avatar
2 votes
2 answers
813 views

How to add reflections to my basic token

I'm new to solidity, and I found this short and sweet smart contract for creating you own token, and it works really well. What I would really like to do is add reflections to this exceedingly simple ...
Adjam's user avatar
  • 127
0 votes
1 answer
33 views

NFT Not Showing Up

Hello I finished every step of the video tutorial titled "How to develop an NFT Smart Contract (ERC721) with Alchemy - Beginner | Road to Web3" until the part where we go to OpenSea testnet ...
zach king's user avatar
1 vote
2 answers
73 views

Deposit DAI on test account

i'm forking euthereum mainet via hardhat , how to deposit some DAI or USDC on my test account ?
adam mr's user avatar
  • 61
2 votes
1 answer
2k views

Sepolia ETH (SEP) not showing in Metamask

The official Sepolia faucet website seems to be having issues (an invalid https certificate I think). I managed to find another faucet and was sent some SEP. The transaction hash is shown below. I can ...
Reno's user avatar
  • 131
0 votes
0 answers
36 views

I am trying to build 0xAPI on my local environment but it occurs following errors

I followed the readme. https://github.com/0xProject/0x-api "yarn build" was succeeded but "yarn db:migrate" occurs following errors.
Smart Dev's user avatar
0 votes
0 answers
37 views

My staging test and unit tests are exceeding timeouts

Whenever I try to pass my staging tests, its exceeding the timeout of 500000ms. Same is for my unit test "picks a winner , resest the lottery , and sends money:" test. I am pasting my code ...
Anooj Patnaik's user avatar
0 votes
1 answer
667 views

Why am I getting an error that addr is not configured for ENS when trying to transfer an ERC20 token on Goerli testnet?

So I am getting this: Error: resolver or addr is not configured for ENS name (argument="name", value="", code=INVALID_ARGUMENT, version=contracts/5.7.0) I know everything's well ...
sunsakis's user avatar
0 votes
2 answers
319 views

i cant find rinkeby even after turning on test net on metamask, who else is having this issue? [duplicate]

I can't find Rinkeby even after turning on the testnet on Metamask. Who else is having this issue?
Idehen Scofield's user avatar
0 votes
3 answers
2k views

Transaction reverted: trying to deploy a contract whose code is too large

My smart contract is over 300 lines of code, complete with events, modifiers, internal functions, getters and setters. I'm trying to run tests using hardhat and chai. All I'm getting is this error: ...
Jean-François Beaulieu's user avatar
1 vote
1 answer
24 views

Live testing so annoying and time-consuming

After days of unit local testing i begin testing on testnet, and it turns that i have some errors that appear from nowhere, to fix those errors i need to redeploy all the contracts and arrange all the ...
noro meb's user avatar
  • 328
0 votes
1 answer
1k views

Add Liquidity to Goerli test network?

I was wondering how can i add liquidity on goerli test network and check its charts like a mainnet erc20 token , is that possible ?
geniar90's user avatar
0 votes
1 answer
32 views

What's the correct way test or setup testnet across different environments?

I have been working in a project where we need to transfer ETH between users. After some investigation and playing with web3.js/ethers.js locally, I was able to run Ganache locally, create wallets and ...
UncleFester's user avatar
0 votes
1 answer
153 views

I am not able to buy testnet tokens in Goerli testnet. Even the testlinks are not shown [duplicate]

This is the transaction hash for testlinks transaction 0xe1a2efca71e333e4b0b8b81f2e109a305905fdf29158bc5f83a935663dccdffd
Suraj Sahoo's user avatar
1 vote
1 answer
852 views

How many GB is the ethereum Blockchain goerli and other testnets?

How many GB is the ethereum Blockchain goerli and others testnets? I could not find this information for testnets, if anyone knows this info using diferents sync modes in Geth (snap, full and archive) ...
Rafael's user avatar
  • 198

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