Wallet signatures: four checks before you approve

A wallet signature can authorize more than a single transaction, so check what the prompt says before approving it. A familiar “Confirm” button may cover a one-time on-chain action, a message that proves control of an address, or permission another contract can use later. Compared with a transaction that displays a clear recipient and amount, a signature can be harder to interpret; compared with rejecting every unfamiliar prompt, checking its details lets you complete legitimate actions without treating every request alike.

Where did the signature request come from?

Check which site or app initiated the request and whether that is where you meant to connect. A wallet can show a domain, app name or connection context, but the name alone does not establish that the request is safe. Compare it with the page you opened, the action you just took and the account you intend to use. If a prompt appears unexpectedly, or after you followed a link you do not trust, decline it and return to the service through a route you know.

This matters especially when a workflow crosses chains or services: the wallet may be connected to one app while the action depends on another. For a route-specific explanation of that context, the fuller guide to thor swap routes covers the details this comparison only touches on. The general check stays the same: make sure the request belongs to the task you chose, not merely to a page that happens to be open.

What exactly are you signing?

Read the displayed message or transaction details, and identify whether the wallet is asking you to sign readable text or approve an on-chain action. A message signature may prove that an address controls a key, or authorize an app-specific step. A transaction can move assets or call a contract. The word “signature” does not by itself tell you which effect applies; inspect the fields the wallet exposes, including the recipient, amount, network and any contract or method information.

Readable, specific text is easier to evaluate than an opaque string of data. Some legitimate applications use structured messages or data that are not designed for casual reading, but unexplained content is still a reason to pause. Do not assume that a signature is harmless because it does not immediately broadcast a transaction: depending on what was signed and how the service uses it, it may be presented later to authorize an action. If the prompt omits details needed to understand the request, cancel and seek an explanation from the service before proceeding.

How much permission does the request grant?

Check whether the request is limited to the immediate action or grants an ongoing allowance. A token approval can let a contract spend tokens from your address; the amount and the contract receiving permission matter. A limited allowance narrows what can be spent under that approval, while a larger or open-ended allowance can be more convenient for repeated use but leaves more room for misuse if the approved contract or service is compromised. A signature can also authorize permissions or actions without looking like a conventional token approval, so review the wallet’s summary rather than relying on the prompt’s label.

• Identify the asset or account the permission affects.
• Check the contract or recipient that receives the permission.
• Prefer a scope that matches the action you intend to take.
• For permissions you no longer need, look for a way to revoke them using the relevant network and account.

Reducing scope can mean approving again later when you make another trade. That extra step is a practical cost, but it avoids leaving broader access in place simply for convenience. The best fit for most users is the smallest permission that allows the intended action to finish.

Are the account and network correct?

Confirm the wallet account and network shown in the prompt match the ones you intend to use. The same address can be relevant on multiple networks, but a contract or asset on one network is not automatically the same as one with a similar name elsewhere. A request on the wrong network may fail, interact with a different contract or create an outcome you did not mean to authorize. Check the network selector and the destination details together, rather than treating either one as enough on its own.

For a high-value or unfamiliar action, take time to compare the prompt with the action summary in the app. If those descriptions disagree, or the wallet cannot show enough information to tell what you are authorizing, decline and investigate. A small test action can help confirm that a new workflow behaves as expected, though it does not prove that every later prompt is safe.

The practical rule is to approve only when the origin, requested action, permission scope and network all fit the task in front of you. Watch for changes in wallet prompt detail, the permissions a service asks to keep, and any network or account switch before signing. Those are the points where a routine confirmation can become a materially different authorization.