Follow permission from the interface to later spending.
LET’S PICTURE IT
A key handed to another person can be used after the initial handoff.
SEE IT FOR YOURSELF
From a public address to a verified signatureStep 1 / 4
An address is public receiving information. It is not the private key that authorizes actions.
An address is public receiving information. It is not the private key that authorizes actions.The local signing system uses secret authorization material. It produces a signature; the private key is not sent along with it.A verifier checks the signed request under the account’s rules. A valid signature does not by itself prove that the action is safe.Balances belong to network state. A wallet is an interface and signing system, not a box containing coins.
Animated local teaching model. No wallet, RPC or live blockchain data. Some labels and hashes are abbreviated for readability.
List the protected property
The user intends to grant a defined spender no more than a chosen permission under the token’s behavior. Identify what the frontend can alter before signing.
Map the trust boundaries
Review site delivery, prepared token address, spender, amount, wallet confirmation and token implementation. A familiar symbol does not authenticate the address.
Consider ordering and future use
An approval can be spent later, and pending allowance replacement has ordering implications. A UI revoke does not reverse earlier included transfers.
Define local checks
Use a local token model to test allowance changes, transferFrom and rejected excess spending. Report unsupported token behaviors and privileged upgrade assumptions.
Your acceptance target
assets: user token balance and allowance authority
actors: user, spender, frontend operator, token admin
checks: exact addresses, scope, ordering, later spending
Use only local examples and public sample addresses. State the assumptions and limits alongside the result.
QUICK CHECK · NO PRESSURE
Does a familiar token symbol authenticate the approved contract?