Citrea Client should be required

[mmtftr]

Currently, we store an Option which is only used to verify things if it's present. Instead, we should verify its existence and fail unless we're in a test_mode state. The test_mode should likely be a config and should be validated so that it's impossible to run test_mode with network being mainnet

clementine/core/src/operator.rs

Lines 525 to 549 in 940fc12

	if let Some(citrea_client) = &self.citrea_client {
	// See: https://gist.github.com/okkothejawa/a9379b02a16dada07a2b85cbbd3c1e80
	let params = rpc_params![
	json!({
	"to": "0x3100000000000000000000000000000000000002",
	"data": format!("0x471ba1e300000000000000000000000000000000000000000000000000000000{}",
	hex::encode(withdrawal_index.to_be_bytes())),
	}),
	"latest"
	];
	let response: String = citrea_client.request("eth_call", params).await?;
	let txid_response = &response[2..66];
	let txid = hex::decode(txid_response).map_err(|e| BridgeError::Error(e.to_string()))?;
	// txid.reverse(); // TODO: we should need to reverse this, test this with declareWithdrawalFiller
	let txid = Txid::from_slice(&txid)?;
	if txid != input_utxo.outpoint.txid || 0 != input_utxo.outpoint.vout {
	// TODO: Fix this, vout can be different from 0 as well
	return Err(BridgeError::InvalidInputUTXO(
	txid,
	input_utxo.outpoint.txid,
	));
	}
	}