Wallets & network fees

What a wallet controls

A crypto wallet is a way to interact with an account. The balance is recorded on the network; the wallet shows that balance and helps you authorize transactions. This distinction matters when an app disappears or a device breaks. Recovery depends on the account's signing and backup arrangement, not on the appearance of the wallet interface.

An address identifies a destination or account. A private key authorizes actions. A recovery phrase may allow the keys to be reconstructed. These are different kinds of information: an address can often be shared to receive funds, while signing secrets should remain private. Some accounts use multiple signers or smart-contract rules, so a phrase is not the recovery model for every wallet.

Related primary source: Ethereum wallets.

Custody and recovery

With self-custody, you take responsibility for access and signing. With a custodial service, a provider controls the keys and gives you an account in its own system. Neither model removes risk. Self-custody introduces backup and transaction-signing risks; custody introduces provider, withdrawal, and account-access risks.

Before relying on a wallet, learn its documented backup process and what a successful recovery requires. Do not enter a recovery phrase into a website claiming to verify or synchronize a wallet. Treat requests to expose signing material as a reason to stop and verify the destination independently. A familiar logo alone is not evidence that an interface is authentic.

Why gas exists

Ethereum execution consumes network resources. Gas measures the work an action needs, and the transaction fee combines the amount of gas used with the effective price paid for each unit. Sending a token, swapping through a contract, and deploying code can require very different amounts of computation.

The asset being transferred does not determine the gas asset on every network. An ERC-20 transfer on Ethereum generally needs ETH to pay its network fee. A token with the same ticker on another network can have different rules, addresses, and fee requirements. Check the specific network rather than assuming a symbol identifies the full transfer route.

Related primary source: Ethereum gas and fees.

Estimate a fee

For an Ethereum example, multiply gas used by the effective gas price in gwei, then divide by one billion to express the result in ETH. A transaction using 21,000 gas at 20 gwei costs 0.00042 ETH. At an illustrative ETH price of $3,000, that is $1.26. These numbers demonstrate the arithmetic; they are not a current fee quote.

The calculator uses the gas amount and price you enter. It does not inspect a pending transaction, predict congestion, or retrieve a market price. Layer 2 networks can add data-related fees or use different fee models, so this simplified calculation may omit part of their total. Use the wallet's final estimate and the network's own documentation before approving an action.

Related primary source: Ethereum gas and fees.

Read the wallet prompt

Check the network, recipient, amount, and requested action before signing. A token approval gives a contract permission to spend a token under specified conditions; it is not the same as a simple transfer. A signature can also authorize actions without immediately sending an onchain transaction, so the absence of a visible gas charge does not establish that a request is harmless.

For a transfer, compare the complete destination using a trusted channel rather than relying only on its first and last characters. Verify that the recipient supports the chosen network and any required memo or tag. A small test transfer can reduce the amount exposed to an addressing mistake, but it does not validate a malicious contract or guarantee later transfers.

Check the receipt

After submission, a transaction hash lets you look up the action on an explorer for the correct network. Submission, inclusion, and finality describe different stages. A wallet saying 'sent' may mean it broadcast the transaction; the recipient or service may wait for additional confirmation before crediting it.

A failed Ethereum transaction can still consume gas because execution work was performed before the failure. Check the receipt's status and gas used instead of assuming that no successful asset transfer means no fee. A pending transaction is a separate case and should be investigated using the wallet's supported options rather than by repeatedly submitting the same action.

Related primary source: Ethereum transactions.

Read crypto news

Start with the original release, governance proposal, network notice, or regulatory publication behind a headline. Identify the date of the underlying event separately from the article's publication date. A proposal, a test deployment, and an active production change should not be described as interchangeable milestones.

Ask what evidence would change the headline's conclusion. A quoted transaction count may include automated activity; a percentage change may start from a small baseline. If an article does not name the network, measurement window, and source, treat those as unresolved questions. Understanding the mechanism is more useful than reacting to a dramatic number in isolation.

A transfer checklist

Record the asset, network, destination, any memo requirement, and the expected fee asset. Check that the wallet has enough of the fee asset in addition to the amount being transferred. Review the signing request and use an independent source for the recipient details when possible.

After sending, keep the transaction hash and reconcile the network receipt with the receiving service's deposit history. If they disagree, distinguish a network failure from a service crediting delay. Never share private keys or a recovery phrase with someone offering to investigate. Public transaction details are usually sufficient to describe what happened onchain.