[SOLVED] Subscribe to events/logs in solana from Typescript code

Subscribe to events/logs in solana from Typescript code

I have used the emit macro in Anchor to emit events from the smart contract as follows,

use anchor_lang::prelude::*;

// handler function inside #[program]
pub fn initialize(_ctx: Context<Initialize>) -> Result<()> {
    emit!(MyEvent {
        data: 5,
        label: [1,2,3,4,5],
    });
    Ok(())
}

#[event]
pub struct MyEvent {
    pub data: u64,
    pub label: [u8; 5],
}

Now I want to subscribe to these events from my TS frontend. I want the ability to subscribe to new events as well as the ability to query past events. Is this possible on Solana and if so, how can I do this?

Solution

The final answer I found was using getSignaturesForAddress on your program, followed by getTransaction for each one returned, and then looking through the logMessages for MyEvent.

For further reference,
https://docs.solana.com/developing/clients/jsonrpc-api#getsignaturestatuses https://docs.solana.com/developing/clients/jsonrpc-api#gettransaction