How to subscribe to starknet contract events

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Import the StarkNet Go Library:
Import the StarkNet Go library at the beginning of your Go file.

go
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import "starknetgo"
Connect to the StarkNet Node:
Establish a connection to the StarkNet node using its endpoint.

go
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client, err := starknetgo.Dial("http://starknet-node-endpoint")
if err != nil {
log.Fatal(err)
}
defer client.Close()
Subscribe to Contract Events:
Use the StarkNet Go library to subscribe to events emitted by the smart contract. You would need the contract ABI and address.

go
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contractAddress := "0x1234567890abcdef1234567890abcdef12345678" // Replace with your contract address

// Subscribe to the event
subscription, err := client.SubscribeToContractEvents(context.TODO(), &starknetgo.ContractEventSubscription{
ContractAddress: common.HexToAddress(contractAddress),
})
if err != nil {
log.Fatal(err)
}

// Listen for events
for {
select {
case event := <-subscription.Events:
// Handle the event
log.Printf("Received event: %+v\n", event)
case err := <-subscription.Errors:
log.Fatal(err)
}
}
Replace the contract address with the actual address of your deployed contract. Additionally, you might need to replace ContractEventSubscription with the actual struct or type provided by the StarkNet Go library for event subscriptions.

Handle Events:
Inside the event handling block, you can define how your application should respond to each event emitted by the smart contract.