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User Guide: Custom networks and sidechains

Learn about best practices for using custom networks and sidechains.

User Guide: Gas

All you need to know about gas, the transaction fee for using a network.

Guides

Como verificar a atividade da minha carteira no explorador de blockchain

What is a blockchain explorer, and how can you use it?

How to run your own Ethereum node and use it with MetaMask

Ethereum.org is the best place to start learning how to run your own Ethereum node.

How to revoke smart contract allowances/token approvals

Learn the difference between revoking approvals, disconnecting dapps, and how to do it.

How to connect to the Gnosis Chain network (formerly xDai)

For an automatic process, go to Chainlist, search for Gnosis, and connect your wallet.

Como faço para estimar a taxa de gás?

Obtendo o preço do gás

How to externally verify that your balance is correct

Verify your account balances outside of MetaMask.

How to use Liquidity Pool (LP) tokens

Curious about LP tokens? Dive in here.

Help

Why are my gas fees so high?

The price of gas is dynamic and is essentially a product of demand. Learn more here.

Why did I pay gas fees for a failed transaction?

Even if it fails, validators must verify and execute your transaction, which takes computational power.

Why am I being asked to sign in? (Sign In With Ethereum)

Sign In With Ethereum (SIWE) is a web3-native method of managing your digital identity.

I am trying to pay the gas fee for OpenSea in order to sell my NFTs

You need to have enough ETH in your wallet to pay for gas.

Learn

Sending (or receiving) a transaction with ENS

What's an ENS, and how does it work with transactions?

What role does staking play on Ethereum?

Staking is used in a very wide variety of contexts. Let's take a look at some of the most common.

How does MetaMask connect to a blockchain network?

Curious how MetaMask wallet lets you interact with blockchain networks? Read on.

What is Infura, and why does MetaMask use it?

Infura is the service provider that MetaMask uses to get information on and off blockchains.

Bitcoin (BTC) on EVM-compatible networks

Not all blockchains are created compatible. Keep an eye out for new developments.

Does MetaMask support Polkadot?

Not currently.

ETH on Sepolia and Holešky (testnets)

ETH on these testnets is a dummy balance and cannot be withdrawn or sent to mainnet.

Field Guide to Bridges

What you need to know about bridges.

How do I send ETH/other tokens to a layer 2 or other network?

Learn how to bridge tokens between networks using MetaMask.

How does MetaMask generate your keys?

Learn more about how your keys are securely and mathematically generated.

Internal transactions

What are internal transactions?

Tax compliance and crypto-assets

You should consult a tax professional about your crypto-assets. Learn why.

Plataformas de Trocas de terceiros

Embora a MetaMask tenha sua própria ferramenta de trocas integrada (Swaps), o mercado oferece todo um ecossistema de plataformas de terceiros para a troca de tokens. O intuito deste artigo é apontar alguns problemas frequentes que os usuários têm ao trocar tokens e servir como um diretório não definitivo para os serviços de suporte às plataformas de troca de terceiros. A MetaMask não é afiliada a nenhuma dessas organizações.

What are metatransactions?

Metatransaction describes a transaction that you instruct a third party to complete on your behalf.

What is a token contract address?

Learn more about token addresses.