MessageValidator (Javadocs [I2P+ 2.13.0+] - API Version 0.9.70+)

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java.lang.Object
- net.i2p.router.MessageValidator

```
public class MessageValidator
extends Object
```
Singleton to manage the logic (and historical data) to determine whether a message is valid or not (meaning it isn't expired and hasn't already been received). We'll need a revamp once we start dealing with long message expirations (since it might involve keeping a significant number of entries in memory), but that probably won't be necessary until I2P 3.0.

Constructor Summary
Constructors
Constructor and Description
MessageValidator(RouterContext context)
MessageValidator.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`(package private) void`	`shutdown()` Stop the message validator and clean up resources.
`void`	`startup()` Start the message validator, initializing the duplicate detection filter.
`String`	`validateMessage(long expiration)` Only check the expiration for the message
`String`	`validateMessage(long messageId, long expiration)` Determine if this message should be accepted as valid (not expired, not a duplicate)

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - MessageValidator
```
public MessageValidator(RouterContext context)
```
    MessageValidator.
- Method Detail
  - shutdown
```
void shutdown()
```
    Stop the message validator and clean up resources.
  - startup
```
public void startup()
```
    Start the message validator, initializing the duplicate detection filter.
  - validateMessage
```
public String validateMessage(long expiration)
```
    Only check the expiration for the message
  - validateMessage
```
public String validateMessage(long messageId,
                              long expiration)
```
    Determine if this message should be accepted as valid (not expired, not a duplicate)
    Returns:
    reason why the message is invalid (or null if the message is valid)

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