Show events in the Solana block explorer
In this article, we will explore how to show the events approved by emit! In the solana block explorer.
What is emit!?
In the Solana block chain, emit! It is a function used to send events to the network. It allows you to define and execute custom functions that interact with other contracts or the block chain. In this case, we will use it to show an event in the block explorer.
Definition of the structure of the event
First, let’s define the structure of the event:
`oxide
#[event]
PUD Struct Claimevent {
Pub participation: U64,
}
`
This defines a simple structure of 'Claiment with a single’ engagement ‘field, which represents the number of commitments (or interactions) in the contract.
Using emit!
Now, let’s use emit! Send the ‘Claimentto the block explorer:
oxide
Issue! (Claimevent {commitment: 123});
`
However, as mentioned above, this will only work if we define an event structure for it. To solve this, we need to add a new type of event and use the 'event' macro (available in SDK of Solana) to define our personalized event:
oxide
Use Solana_SDK :: Event :: {event, eventord};
#[event]
PUD Struct Claimevent {
Pub participation: U64,
}
Implication event for Claimevent {
FN Signature (& self) -> & [u8] {
// Returns the signing of the event (it is not shown in this example)
Not implemented! ()
}
}
`
In this updated code, we define a newClaimeventstructure and implement the 'event' feature. Thefirm () method is called to return the metadata of the event, but for now, it returns an empty byte portion.
Show events at block explorer
To show events in the block explorer, you must use the blockchain:
`oxide
use blockchain :: {block, event, blockid};
Fn Main () {
// Obtain the current block ID
Let Block_id = Block :: Blockid :: New ();
// Define an event record for our personalized event
Leave Event_record = Eventorord :: New ();
Event_record.set_field (“engagement”, 123);
// Create a new block object
Leave block_data = block_data! {
ID: Block_id.to_sting (),
Events: some (neighbor! [Event_record.clone ()]),
};
// Send block data to the block chain
Let mut tx = block :: Transaction :: new (). Set_data (block_data) .signer (). Build ();
Blockchain :: Send_transaction (& tx, “My-Transaction”);
}
`
In this example, we use theblockchainmodule to create a new block object and add our personalized events record. Then we send the block data to the block chain using theSend_Transaction ()`.
Example of use cases
This example demonstrates how to show events in the Solana block explorer. You can apply a logic similar to other contracts or integrations, such as:
- Show user participation metrics
- Show transaction history
- Registration API calls
Keep in mind that this is a simplified example and should consider factors such as the persistence of the event, registration and security by implementing personalized events in the Solana block chain.