Questions tagged [testnets]
testnets are an alternative blockchains to be used for testing and development with no value attached
609
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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 ...
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1
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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 ...
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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":&...
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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 ...
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2
answers
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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 ...
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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??
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74
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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 ...
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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,
&...
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1
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90
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"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 ...
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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 ...
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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 ...
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1
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11
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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?
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3
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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 ...
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137
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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
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2
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424
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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?
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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 ...
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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, ...
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2
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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 ...
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Loolong for tusdt faucet Sepolia [closed]
Found only one but it is not working . Can anyone please point out a working one. Thank you
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1
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127
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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 ...
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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
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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 ...
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Where can Developers get Sepolia Testnet ETH? [duplicate]
Where can web3 developers get free Sepolia Testnet ETH to use in their development process?
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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 ...
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1
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49
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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 ...
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1
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63
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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.
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1
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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-...
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1
answer
424
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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 ...
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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 ...
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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 ...
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1
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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 ...
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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 ...
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2
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172
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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.
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169
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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 ...
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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 ...
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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&...
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2
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813
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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 ...
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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 ...
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2
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73
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Deposit DAI on test account
i'm forking euthereum mainet via hardhat , how to deposit some DAI or USDC on my test account ?
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1
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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 ...
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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.
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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 ...
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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 ...
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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?
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3
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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:
...
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1
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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 ...
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1k
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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 ?
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32
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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 ...
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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
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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) ...
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