A destination must validate origin and authorized sender, not just decode a payload.
LET’S PICTURE IT
A letter needs an authenticated source office and sender, not merely readable contents.
SEE IT FOR YOURSELF
Receive, check and share across independent nodesStep 1 / 4
A node receives a proposed transaction or block-related message. Receipt is not the same as accepting its claims.
A node receives a proposed transaction or block-related message. Receipt is not the same as accepting its claims.The node checks the relevant authorization and protocol rules. Popularity does not make an invalid state transition valid.Valid candidate data can propagate to peers. Connections and timing differ, so there is no perfect simultaneous worldwide view.Peers validate under the same protocol rules. This illustration is about verification and propagation, not a complete proof-of-stake consensus algorithm.
Animated local teaching model. No wallet, RPC or live blockchain data. Some labels and hashes are abbreviated for readability.
List the source identity fields
A message may need to bind source chain, source application, destination and action. The transport protocol defines how those claims become authenticated.
Check the trusted entry point
Receiving a call from a messenger contract can be one condition, but the messenger’s reported origin sender and chain may also need verification.
Bind application semantics
An authenticated generic message is not automatically authorized to mint, unlock or upgrade. Check the specific action, amount and destination policy.
Test forged context locally
Exercise direct calls, wrong origin chains, wrong remote senders and altered destinations. Keep proof and messenger trust assumptions documented.