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clarify types of state transitions in the diagram

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Sergei Tikhomirov 2024-09-25 14:07:32 +02:00
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standards/core/rln-contract.md
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@ -91,17 +91,24 @@ Any existing membership MUST always be in exactly one of the following states:
graph TD;
NonExistent --> |"register"| Active;
Active -.-> |"time T passed"| GracePeriod;
GracePeriod --> |"extend"| Active;
GracePeriod ==> |"extend"| Active;
GracePeriod -.-> |"time G passed"| Expired;
GracePeriod --> |"erase"| ErasedAwaitsWithdrawal;
GracePeriod ==> |"erase"| ErasedAwaitsWithdrawal;
Expired --> |"erase"| ErasedAwaitsWithdrawal;
Expired --> |"overwritten by a new membership"| ErasedAwaitsWithdrawal;
ErasedAwaitsWithdrawal --> |"withdraw"| Erased;
ErasedAwaitsWithdrawal ==> |"withdraw"| Erased;
```
State updates triggered by a transaction (e.g., from _GracePeriod_ to _Active_ as a result of `extend`) MUST be applied immediately.
State updates defined by time progression (e.g., from _GracePeriod_ to _Expired_ after time `G`) MAY be applied lazily.
Different line types denote the types of state transitions:
| Line type | Triggered by | Requirements |
| -------------- | ---------------- | ------------------------------------------------------------------------------------ |
| Thick (`==`) | Transaction | MUST be initiable by the membership keeper and MUST NOT be initiable by other users. |
| Thin (`--`) | Transaction | MAY be initiable by any user. |
| Dotted (`-.-`) | Time progression | MAY be applied lazily. |
Transaction-triggered state transitions MUST be applied immediately.
When handling a membership-specific transaction, the contract MUST:
- check whether the state of the involved membership is up-to-date;