Answers for questions on topics ranging from the basics of Ethereum to the features of our platform frequently asked by our users.
How to refund a Transaction?Featured
I have sent funds to the wrong address on Ethereum. Can I get a refund or cancel the transaction?
What is Gas Fee? ⛽Featured
An elaborate description of gas fee, its function and the optimum price and limit.
What is an ERC-721 Token?Featured
Unlike ERC-20, ERC-721 tokens are non-fungible; meaning that each and every ERC-721 token has it's own unique value and is to be treated individually.
I accidentally sent funds to a contract address.
What happens if you accidentally sent your tokens to a contract address? Are they recoverable? Read on.
How to replace a Pending/Dropped transaction
A brief tutorial on how to replace a pending or a dropped transaction on Ethereum using MetaMask.
What is an ERC-1155 Token?
Other than the popular ERC-20 and ERC-721 tokens, there is a third token standard that is widely used in Ethereum.
Public Name Tags, Labels & Public Notes
An introduction to Etherscan's Public Name Tags, Labels and Public Notes metadata that provide context to Ethereum addresses.
What happens when a Dropped Transaction is replaced by another Transaction?
An article explaining what is really happening when another transaction replaces your dropped transaction.
What is a Private Key?
A short description and the use of an EOA's private key.
What do I do if I lost my Private Key?
A short article on the alternatives to consider in the scenario of a lost private key.
How to Subscribe & Unsubscribe from the Etherscan Newsletter
Etherscan sends a monthly email newsletter to share analyses, updates, trending topics, reports and swag with the community. You may choose to subscribe or unsubscribe from the newsletter at any time.
Transaction marked “Success”, but I can’t see my funds. Why?
An article on the scenarios that could have caused the issue and what you can do to solve it.
How Do I Sell Ether?
A step-by-step guide on how you can sell off your Ether through an exchange or by P2P.
How Do I Buy Ether?
A general look on how to buy Ether through a number of commonly used ways of buying Ether.
Where Can I Buy Ether?
A simple guide on where can you buy Ether.
What is Ether (ETH)?
A simple explanation on Ether, its uses and significance to the Ethereum blockchain.
What Is A Wallet?
A brief explanation on the wallet that is used in the Ethereum blockchain, types of available wallets and how they work.
My Coins Were Sent To Your Site, How Do I Recover Them?
The solution for the question of why users' tokens are sent to our site and what you can do about it.
Did not receive Verification Email?
A breakdown on the possible reasons why you are not receiving the verification email and their solutions.
How to send ETH/Token?
This article will give you some idea in sending ETH or token from your wallet.
Sent Tokens to a Wallet that does not support ERC-20 Tokens
If you accidentally sent ERC-20 tokens to your wallet address that does not support ERC-20 tokens, this article may help you in the retrieval.
What is an Ethereum Address?
There are two types of address in Ethereum: Externally Owned Address (EOAs) and Contract Address.
What is a Transaction Hash (Txn hash)?
A transaction hash (Txn Hash), or also known as a transaction ID, is given whenever a transaction is initiated on the Ethereum Blockchain.
How to transfer and withdraw from Etherscan?
Etherscan is a block explorer for the Ethereum blockchain and can only provide and display information on transactions that occur within the network.
What are the Reasons for Failed Transactions?
When a transaction fails, the funds remain minus the gas fees. There are different scenarios in why a transaction fails in the first place.
Transaction Dropped & Replaced?
A transaction that is previously broadcasted on the network (but yet to be included in a block) can get dropped from the connected nodes.
ERC-20 Token Transfer Might Have Failed?
There are times when an ERC-20 token transfer might have failed and this article lists some of the common reasons.
What is an ERC-20 token ?
ERC-20 tokens are tokens that follow a set of standards defined for smart contracts on Ethereum.
What is a Pending Transaction? ⌛
If your transaction shows Pending, your transaction is pending to be mined, please be patient.