Autres utilisations du web3En savoir plusEn savoir plusArticles mis en avant User guide: EVM networks and sidechains Learn how to safely use custom EVM-compatible networks or sidechains in MetaMask. Best practices, security tips, and how to avoid sending assets incorrectly.How gas fees, limits, and network fees work Dive into how gas fees work on MetaMask—from base fee and priority fee to gas limits and token payments. Learn to optimize transactions safely.Guides Check wallet activity on the blockchain explorer Qu’est-ce qu’un explorateur de blockchain et comment l’utiliser ?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.Revoke smart contract allowances/token approvals Learn the difference between revoking approvals, disconnecting dapps, and how to do it.Connect to the Gnosis Chain network (formerly xDai) Add Gnosis Chain (formerly xDai) to MetaMask automatically via Chainlist or manually with the network details.Estimate the gas fee Découvrez ici comment vous pouvez estimer les frais de gaz pour une transaction.Externally verify that your balance is correct Verify your account balances outside of MetaMask.Use Liquidity Pool (LP) tokens Curious about LP tokens? Dive in here.En savoir plus Learn the basics of blockchains, Ethereum, miners and more Explore the foundational concepts of blockchains, Ethereum miners and validators, gas fees, NFTs, token networks, and how all these elements power your MetaMask experience.Send or receive transactions with ENS in MetaMask Learn how to send or receive crypto using an ENS name in MetaMask. Step-by-step guide to connect, transact, and avoid address errors with .eth domains.What role does staking play on Ethereum? Learn how staking supports Ethereum's security, governance, and rewards ecosystem. Discover why staking matters for ETH holders and how it powers web3.How does MetaMask connect to a blockchain network? Curious how MetaMask lets you interact with blockchain networks? Read on.What is Infura, and why does MetaMask use it? Discover how Infura powers MetaMask by providing reliable blockchain connectivity, why it’s used by default, and how you can switch RPC providers for privacy and control.Understanding the Ethereum address format and why it matters Learn how Ethereum and EVM-compatible addresses work (starting with “0x”), why using the right format matters in MetaMask, and how to avoid sending funds to the wrong network..Bitcoin (BTC) on EVM-compatible networks Learn how Bitcoin (BTC) is supported in MetaMask, and how to use wrapped variants on EVM-compatible chains safely and correctly.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.User guide: bridges What you need to know about bridges.Send ETH or other tokens to a layer 2 or other network Move tokens between networks using MetaMask.How does MetaMask generate my keys? Learn more about how your keys are securely and mathematically generated.Internal transactions What are internal transactions?What you need to know about tax compliance and crypto assets Understand high level crypto tax compliance for digital assets in MetaMask. Learn about taxable events, record-keeping, reporting requirements and why gains from crypto matter.How third-party swap platforms work through MetaMask Learn how MetaMask integrates with third-party swap platforms and providers. Understand how to use them, review fees, and choose trusted services for token swaps.Understand what metatransactions are in MetaMask Learn what meta-transactions are, how they let someone else cover gas fees for you, and how they improve dapp usability while keeping your wallet secure.What is a token contract address? Discover what a token contract address is, why it’s essential for wallets like MetaMask, and how to verify it safely before adding or transacting.Wallet vs. account vs. address: What's the difference in MetaMask? Understand the difference between a MetaMask wallet (software tool), an account (cluster of multichain addresses), and an address (public-private key pair per network).Aide Why are my gas fees so high? Discover why your MetaMask gas fees can spike due to network congestion, smart contract complexity, and demand. Learn how to save on transaction costs and optimize timing.Why did I pay gas fees for a failed transaction? Learn why you still pay gas fees for failed MetaMask transactions. Understand how blockchain computation works and how to avoid failures in the future.Why does MetaMask ask me to 'Sign in with Ethereum'? Learn why MetaMask requests a signature to connect with a dapp using Sign-In With Ethereum (SIWE), what permissions it grants, and how to authenticate safely.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.
User guide: EVM networks and sidechains Learn how to safely use custom EVM-compatible networks or sidechains in MetaMask. Best practices, security tips, and how to avoid sending assets incorrectly.
How gas fees, limits, and network fees work Dive into how gas fees work on MetaMask—from base fee and priority fee to gas limits and token payments. Learn to optimize transactions safely.
Check wallet activity on the blockchain explorer Qu’est-ce qu’un explorateur de blockchain et comment l’utiliser ?
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.
Revoke smart contract allowances/token approvals Learn the difference between revoking approvals, disconnecting dapps, and how to do it.
Connect to the Gnosis Chain network (formerly xDai) Add Gnosis Chain (formerly xDai) to MetaMask automatically via Chainlist or manually with the network details.
Estimate the gas fee Découvrez ici comment vous pouvez estimer les frais de gaz pour une transaction.
Learn the basics of blockchains, Ethereum, miners and more Explore the foundational concepts of blockchains, Ethereum miners and validators, gas fees, NFTs, token networks, and how all these elements power your MetaMask experience.
Send or receive transactions with ENS in MetaMask Learn how to send or receive crypto using an ENS name in MetaMask. Step-by-step guide to connect, transact, and avoid address errors with .eth domains.
What role does staking play on Ethereum? Learn how staking supports Ethereum's security, governance, and rewards ecosystem. Discover why staking matters for ETH holders and how it powers web3.
How does MetaMask connect to a blockchain network? Curious how MetaMask lets you interact with blockchain networks? Read on.
What is Infura, and why does MetaMask use it? Discover how Infura powers MetaMask by providing reliable blockchain connectivity, why it’s used by default, and how you can switch RPC providers for privacy and control.
Understanding the Ethereum address format and why it matters Learn how Ethereum and EVM-compatible addresses work (starting with “0x”), why using the right format matters in MetaMask, and how to avoid sending funds to the wrong network..
Bitcoin (BTC) on EVM-compatible networks Learn how Bitcoin (BTC) is supported in MetaMask, and how to use wrapped variants on EVM-compatible chains safely and correctly.
ETH on Sepolia and Holešky (testnets) ETH on these testnets is a dummy balance and cannot be withdrawn or sent to mainnet.
How does MetaMask generate my keys? Learn more about how your keys are securely and mathematically generated.
What you need to know about tax compliance and crypto assets Understand high level crypto tax compliance for digital assets in MetaMask. Learn about taxable events, record-keeping, reporting requirements and why gains from crypto matter.
How third-party swap platforms work through MetaMask Learn how MetaMask integrates with third-party swap platforms and providers. Understand how to use them, review fees, and choose trusted services for token swaps.
Understand what metatransactions are in MetaMask Learn what meta-transactions are, how they let someone else cover gas fees for you, and how they improve dapp usability while keeping your wallet secure.
What is a token contract address? Discover what a token contract address is, why it’s essential for wallets like MetaMask, and how to verify it safely before adding or transacting.
Wallet vs. account vs. address: What's the difference in MetaMask? Understand the difference between a MetaMask wallet (software tool), an account (cluster of multichain addresses), and an address (public-private key pair per network).
Why are my gas fees so high? Discover why your MetaMask gas fees can spike due to network congestion, smart contract complexity, and demand. Learn how to save on transaction costs and optimize timing.
Why did I pay gas fees for a failed transaction? Learn why you still pay gas fees for failed MetaMask transactions. Understand how blockchain computation works and how to avoid failures in the future.
Why does MetaMask ask me to 'Sign in with Ethereum'? Learn why MetaMask requests a signature to connect with a dapp using Sign-In With Ethereum (SIWE), what permissions it grants, and how to authenticate safely.
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.