Fix RPC Txid handling and mempool eviction

- Replace `bitcoin::consensus::encode::deserialize_hex()` with `hex_str.parse::<Txid>()`
  when parsing Txids from RPC, and `serialize_hex()` with `txid.to_string()` when sending to RPC,
  ensuring proper handling of Bitcoin Core's reversed-byte hexadecimal format.
- Fix mempool eviction logic: transactions that are no longer in the mempool are now
  correctly removed from wallet consideration, preventing stale pending transactions
  from inflating unconfirmed balances.

Author: moisesPompilio

src/chain/bitcoind.rs

@@ -754,7 +754,7 @@ impl BitcoindClient {
 	async fn get_raw_transaction_rpc(
 		rpc_client: Arc<RpcClient>, txid: &Txid,
 	) -> std::io::Result<Option<Transaction>> {
-		let txid_hex = bitcoin::consensus::encode::serialize_hex(txid);
+		let txid_hex = txid.to_string();
 		let txid_json = serde_json::json!(txid_hex);
 		match rpc_client
 			.call_method::<GetRawTransactionResponse>("getrawtransaction", &[txid_json])
@@ -792,7 +792,7 @@ impl BitcoindClient {
 	async fn get_raw_transaction_rest(
 		rest_client: Arc<RestClient>, txid: &Txid,
 	) -> std::io::Result<Option<Transaction>> {
-		let txid_hex = bitcoin::consensus::encode::serialize_hex(txid);
+		let txid_hex = txid.to_string();
 		let tx_path = format!("tx/{}.json", txid_hex);
 		match rest_client
 			.request_resource::<JsonResponse, GetRawTransactionResponse>(&tx_path)
@@ -889,7 +889,7 @@ impl BitcoindClient {
 	async fn get_mempool_entry_inner(
 		client: Arc<RpcClient>, txid: Txid,
 	) -> std::io::Result<Option<MempoolEntry>> {
-		let txid_hex = bitcoin::consensus::encode::serialize_hex(&txid);
+		let txid_hex = txid.to_string();
 		let txid_json = serde_json::json!(txid_hex);
 
 		match client.call_method::<GetMempoolEntryResponse>("getmempoolentry", &[txid_json]).await {
@@ -1109,7 +1109,7 @@ impl BitcoindClient {
 		let mempool_entries_cache = mempool_entries_cache.lock().await;
 		let evicted_txids = unconfirmed_txids
 			.into_iter()
-			.filter(|txid| mempool_entries_cache.contains_key(txid))
+			.filter(|txid| !mempool_entries_cache.contains_key(txid))
 			.map(|txid| (txid, latest_mempool_timestamp))
 			.collect();
 		Ok(evicted_txids)
@@ -1236,7 +1236,7 @@ impl TryInto<GetRawMempoolResponse> for JsonResponse {
 
 		for hex in res {
 			let txid = if let Some(hex_str) = hex.as_str() {
-				match bitcoin::consensus::encode::deserialize_hex(hex_str) {
+				match hex_str.parse::<Txid>() {
 					Ok(txid) => txid,
 					Err(_) => {
 						return Err(std::io::Error::new(