#[derive(Debug, Serialize, Deserialize)]
struct TransactionDetail {
signature: String,
status: String,
accounts: Vec<String>,
instructions: Vec<String>,
}

async fn analyze_transaction(client: &RpcClient, signature: &Signature) -> Option<TransactionDetail> {
// Fetch transaction details
let config = RpcTransactionConfig {
encoding: Some("json".to_string()),
commitment: Some(CommitmentConfig::confirmed()),
..RpcTransactionConfig::default()
};

match client.get_transaction(signature, config) {
Ok(Some(transaction)) => {
let status = if transaction.transaction.meta.is_some() {
"Success".to_string()
} else {
"Failure".to_string()
};

// Extracting accounts involved
let accounts = transaction.transaction.transaction.message.account_keys
.iter()
.map(|pubkey| pubkey.to_string())
.collect();

// Extracting instructions in the transaction
let instructions = transaction.transaction.transaction.message.instructions
.iter()
.map(|instr| format!("{:?}", instr))
.collect();

Some(TransactionDetail {
signature: signature.to_string(),
status,
accounts,
instructions,
})
}
Ok(None) | Err(_) => None,
}
}

async fn fetch_and_analyze_transactions(client: RpcClient) {
let mut seen_signatures: HashMap<String, bool> = HashMap::new();

loop {
// Fetch recent signatures for analysis
match client.get_signatures_for_address_with_config(
&client.pubkey().unwrap(),
RpcSignaturesForAddressConfig {
limit: Some(10),
commitment: Some(CommitmentConfig::confirmed()),
..RpcSignaturesForAddressConfig::default()
},
) {
Ok(signatures) => {
for RpcConfirmedTransactionStatusWithSignature { signature, .. } in signatures {
// Avoid duplicate processing
if seen_signatures.contains_key(&signature) {
continue;
}

// Mark signature as seen
seen_signatures.insert(signature.clone(), true);

// Analyze each transaction
let transaction_detail = analyze_transaction(&client, &signature.parse().unwrap()).await;

if let Some(detail) = transaction_detail {
println!("Transaction: {:?}", detail);
}
}
}
Err(e) => {
eprintln!("Error fetching signatures: {:?}", e);
}
}

// Wait before fetching again
sleep(Duration::from_secs(5)).await;
}
}

#[tokio::main]
async fn main() {
// RPC client setup
let rpc_url = "https://api.mainnet-beta.solana.com";
let client = RpcClient::new_with_timeout_and_commitment(
rpc_url.to_string(),
Duration::from_secs(10),
CommitmentConfig::confirmed(),
);

// Define constants and thresholds
const HUGE_BUY_THRESHOLD: f64 = 1000.0; // Set to your desired threshold (e.g., 1000 tokens)
const SOLANA_RPC_URL: &str = "https://api.mainnet-beta.solana.com";
const TARGET_TOKEN_MINT: &str = "INSERT_TOKEN_MINT_HERE"; // Replace with your target token mint address

#[tokio::main]
async fn main() {
let client = RpcClient::new_with_commitment(SOLANA_RPC_URL.to_string(), CommitmentConfig::confirmed());

// Create a keypair for the bot account (private key required for signing transactions)
let bot_keypair = Keypair::new(); // Replace with a stored keypair in a production app

// Monitor for large transactions in a loop
loop {
println!("Checking for large transactions...");

// Fetch recent transactions for the target token mint
if let Ok(signatures) = client.get_signatures_for_address_with_config(
&Pubkey::from_str(TARGET_TOKEN_MINT).unwrap(),
RpcSignaturesForAddressConfig {
limit: Some(10),
commitment: Some(CommitmentConfig::confirmed()),
..RpcSignaturesForAddressConfig::default()
},
) {
for signature_info in signatures {
// Retrieve transaction details
if let Ok(Some(transaction)) = client.get_transaction(&signature_info.signature, RpcTransactionConfig::default()) {
// Check transaction amount for large buyers
if let Some(amount) = analyze_transaction_for_large_buy(&transaction) {
if amount > HUGE_BUY_THRESHOLD {
println!("Detected huge buy of {} tokens in transaction {}", amount, signature_info.signature);

// Trigger response - Send a purchase transaction in response
match send_response_transaction(&client, &bot_keypair).await {
Ok(_) => println!("Successfully responded to huge buy!"),
Err(e) => eprintln!("Failed to send response transaction: {:?}", e),
}
}
}
}
}
}

// Wait before the next check
sleep(Duration::from_secs(30)).await;
}
}

// Function to analyze transaction details and check for large buys
fn analyze_transaction_for_large_buy(transaction: &solana_client::rpc_response::RpcTransaction) -> Option<f64> {
// Parse transaction instructions to detect token transfer amount (requires custom parsing per token program)
// Placeholder - Actual parsing logic will depend on token program and Solana program accounts used.
// This is just a mock example.
Some(1200.0) // Replace with actual parsing logic for your use case
}

// Function to send a response transaction
async fn send_response_transaction(client: &RpcClient, payer: &Keypair) -> Result<(), Box<dyn std::error::Error>> {
// Define recipient and amount (in lamports)
let recipient_pubkey = Pubkey::from_str("INSERT_RECIPIENT_ADDRESS_HERE").unwrap();
let lamports = 1_000_000; // Example amount - adjust based on token and strategy

// Build a transfer transaction
let transaction = Transaction::new_signed_with_payer(
&[system_instruction::transfer(&payer.pubkey(), &recipient_pubkey, lamports)],
Some(&payer.pubkey()),
&[payer],
client.get_recent_blockhash()?.0,
);