A log is a record emitted by code, not a universal guarantee of balance movement.
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A printed receipt can describe an action, while checking the underlying register answers whether the expected accounting effect occurred.
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From an emitted Transfer event to a receipt logStep 1 / 4
A token implementation may update balances and emit its standard Transfer event. State and the emitted record are related but distinct.
A token implementation may update balances and emit its standard Transfer event. State and the emitted record are related but distinct.A non-anonymous Transfer event uses the full thirty-two-byte Keccak-256 signature digest as topic zero, not a four-byte function selector.In the common ERC-20 shape, from and to occupy topics one and two. The raw value is a thirty-two-byte data word. Other standards can index fields differently.An application can decode receipt logs under the correct ABI. A matching signature does not establish that an unknown emitter is an honest token.
Animated local teaching model. No wallet, RPC or live blockchain data. Some labels and hashes are abbreviated for readability.
Events are useful interfaces
Token standards define expected event behavior so applications can build histories. A normal implementation emits logs alongside relevant state changes. This makes logs valuable for indexing and user interfaces.
An untrusted contract can construct bytes
The existence of a familiar event signature does not make its emitter trustworthy. A malicious contract can emit misleading logs or use the same signature with a different effective story.
The decoder checks shape
Our ERC-20 Transfer decoder interprets three supplied topics and a data word under the standard common layout. It neither authenticates a token nor queries state to confirm a claimed transfer.
Match evidence to the conclusion
For an actual balance or permission claim, identify the contract, network, implementation and state. Logs add context but should not be treated as a standalone economic safety certificate.