diff --git a/src/lsps0/ser.rs b/src/lsps0/ser.rs
index f0a2bfa..16b61f7 100644
--- a/src/lsps0/ser.rs
+++ b/src/lsps0/ser.rs
@@ -15,11 +15,11 @@ use crate::lsps1::msgs::{
 use crate::lsps2::msgs::{
 	LSPS2Message, LSPS2Request, LSPS2Response, LSPS2_BUY_METHOD_NAME, LSPS2_GET_INFO_METHOD_NAME,
 };
-use crate::prelude::{HashMap, String, ToString, Vec};
+use crate::prelude::{HashMap, String, ToString};
 
-use lightning::impl_writeable_msg;
 use lightning::ln::msgs::LightningError;
 use lightning::ln::wire;
+use lightning::util::ser::WithoutLength;
 
 use bitcoin::secp256k1::PublicKey;
 
@@ -42,6 +42,8 @@ pub(crate) const JSONRPC_ERROR_FIELD_KEY: &str = "error";
 pub(crate) const JSONRPC_INVALID_MESSAGE_ERROR_CODE: i32 = -32700;
 pub(crate) const JSONRPC_INVALID_MESSAGE_ERROR_MESSAGE: &str = "parse error";
 
+pub(crate) const _LSPS0_CLIENT_REJECTED_ERROR_CODE: i32 = 001;
+
 #[derive(Copy, Clone, Debug, PartialEq, Eq)]
 pub(crate) enum LSPSMethod {
 	LSPS0ListProtocols,
@@ -160,7 +162,23 @@ pub struct RawLSPSMessage {
 	pub payload: String,
 }
 
-impl_writeable_msg!(RawLSPSMessage, { payload }, {});
+// We encode `RawLSPSMessage`'s payload without a length prefix as LSPS0 expects it to be the
+// remainder of the object.
+impl lightning::util::ser::Writeable for RawLSPSMessage {
+	fn write<W: lightning::util::ser::Writer>(
+		&self, w: &mut W,
+	) -> Result<(), lightning::io::Error> {
+		WithoutLength(&self.payload).write(w)?;
+		Ok(())
+	}
+}
+
+impl lightning::util::ser::Readable for RawLSPSMessage {
+	fn read<R: lightning::io::Read>(r: &mut R) -> Result<Self, lightning::ln::msgs::DecodeError> {
+		let payload_without_length = WithoutLength::read(r)?;
+		Ok(Self { payload: payload_without_length.0 })
+	}
+}
 
 impl wire::Type for RawLSPSMessage {
 	fn type_id(&self) -> u16 {
diff --git a/src/lsps1/msgs.rs b/src/lsps1/msgs.rs
index 58c48a3..d518c3c 100644
--- a/src/lsps1/msgs.rs
+++ b/src/lsps1/msgs.rs
@@ -21,9 +21,7 @@ pub(crate) const LSPS1_CREATE_ORDER_METHOD_NAME: &str = "lsps1.create_order";
 pub(crate) const LSPS1_GET_ORDER_METHOD_NAME: &str = "lsps1.get_order";
 
 pub(crate) const LSPS1_CREATE_ORDER_REQUEST_INVALID_PARAMS_ERROR_CODE: i32 = -32602;
-pub(crate) const LSPS1_CREATE_ORDER_REQUEST_ORDER_MISMATCH_ERROR_CODE: i32 = 1000;
-pub(crate) const LSPS1_CREATE_ORDER_REQUEST_CLIENT_REJECTED_ERROR_CODE: i32 = 1001;
-pub(crate) const LSPS1_CREATE_ORDER_REQUEST_INVALID_TOKEN_ERROR_CODE: i32 = 2;
+pub(crate) const LSPS1_CREATE_ORDER_REQUEST_ORDER_MISMATCH_ERROR_CODE: i32 = 100;
 
 /// The identifier of an order.
 #[derive(Clone, Debug, PartialEq, Eq, Deserialize, Serialize, Hash)]
diff --git a/src/lsps2/client.rs b/src/lsps2/client.rs
index 05431dd..e00ad44 100644
--- a/src/lsps2/client.rs
+++ b/src/lsps2/client.rs
@@ -269,7 +269,7 @@ where
 						action: ErrorAction::IgnoreAndLog(Level::Info),
 					})?;
 
-				if let Ok(intercept_scid) = result.intercept_scid.to_scid() {
+				if let Ok(intercept_scid) = result.jit_channel_scid.to_scid() {
 					self.pending_events.enqueue(Event::LSPS2Client(
 						LSPS2ClientEvent::InvoiceParametersReady {
 							request_id,
@@ -283,7 +283,7 @@ where
 					return Err(LightningError {
 						err: format!(
 							"Received buy response with an invalid intercept scid {:?}",
-							result.intercept_scid
+							result.jit_channel_scid
 						),
 						action: ErrorAction::IgnoreAndLog(Level::Info),
 					});
diff --git a/src/lsps2/msgs.rs b/src/lsps2/msgs.rs
index c83e41f..3ef34aa 100644
--- a/src/lsps2/msgs.rs
+++ b/src/lsps2/msgs.rs
@@ -17,11 +17,11 @@ use crate::utils;
 pub(crate) const LSPS2_GET_INFO_METHOD_NAME: &str = "lsps2.get_info";
 pub(crate) const LSPS2_BUY_METHOD_NAME: &str = "lsps2.buy";
 
-pub(crate) const LSPS2_GET_INFO_REQUEST_UNRECOGNIZED_OR_STALE_TOKEN_ERROR_CODE: i32 = 2;
+pub(crate) const LSPS2_GET_INFO_REQUEST_UNRECOGNIZED_OR_STALE_TOKEN_ERROR_CODE: i32 = 200;
 
-pub(crate) const LSPS2_BUY_REQUEST_INVALID_OPENING_FEE_PARAMS_ERROR_CODE: i32 = 2;
-pub(crate) const LSPS2_BUY_REQUEST_PAYMENT_SIZE_TOO_SMALL_ERROR_CODE: i32 = 3;
-pub(crate) const LSPS2_BUY_REQUEST_PAYMENT_SIZE_TOO_LARGE_ERROR_CODE: i32 = 4;
+pub(crate) const LSPS2_BUY_REQUEST_INVALID_OPENING_FEE_PARAMS_ERROR_CODE: i32 = 201;
+pub(crate) const LSPS2_BUY_REQUEST_PAYMENT_SIZE_TOO_SMALL_ERROR_CODE: i32 = 202;
+pub(crate) const LSPS2_BUY_REQUEST_PAYMENT_SIZE_TOO_LARGE_ERROR_CODE: i32 = 203;
 
 #[derive(Clone, Debug, PartialEq, Eq, Deserialize, Serialize)]
 /// A request made to an LSP to learn their current channel fees and parameters.
@@ -150,7 +150,7 @@ impl InterceptScid {
 #[derive(Clone, Debug, PartialEq, Eq, Deserialize, Serialize)]
 pub struct BuyResponse {
 	/// The intercept short channel id used by LSP to identify need to open channel.
-	pub intercept_scid: InterceptScid,
+	pub jit_channel_scid: InterceptScid,
 	/// The locktime expiry delta the lsp requires.
 	pub lsp_cltv_expiry_delta: u32,
 	/// A flag that indicates who is trusting who.
@@ -375,4 +375,56 @@ mod tests {
 		let json_str = r#"{"opening_fee_params":{"max_client_to_self_delay":128,"max_payment_size_msat":"100000000","min_fee_msat":"100","min_lifetime":144,"min_payment_size_msat":"1","promise":"1134a5c51e3ba2e8f4259610d5e12c1bf4c50ddcd3f8af563e0a00d1fff41dea","proportional":21,"valid_until":"2023-05-20T08:30:45Z"},"payment_size_msat":null}"#;
 		assert_eq!(buy_request_variable, serde_json::from_str(json_str).unwrap());
 	}
+
+	#[test]
+	fn parse_spec_test_vectors() {
+		// Here, we simply assert that we're able to parse all examples given in LSPS2.
+		let json_str = r#"{
+			"opening_fee_params_menu": [
+			{
+				"min_fee_msat": "546000",
+				"proportional": 1200,
+				"valid_until": "2023-02-23T08:47:30.511Z",
+				"min_lifetime": 1008,
+				"max_client_to_self_delay": 2016,
+				"min_payment_size_msat": "1000",
+				"max_payment_size_msat": "1000000",
+				"promise": "abcdefghijklmnopqrstuvwxyz"
+			},
+			{
+				"min_fee_msat": "1092000",
+				"proportional": 2400,
+				"valid_until": "2023-02-27T21:23:57.984Z",
+				"min_lifetime": 1008,
+				"max_client_to_self_delay": 2016,
+				"min_payment_size_msat": "1000",
+				"max_payment_size_msat": "1000000",
+				"promise": "abcdefghijklmnopqrstuvwxyz"
+			}
+			]
+		}"#;
+		let _get_info_response: GetInfoResponse = serde_json::from_str(json_str).unwrap();
+
+		let json_str = r#"{
+			"opening_fee_params": {
+				"min_fee_msat": "546000",
+				"proportional": 1200,
+				"valid_until": "2023-02-23T08:47:30.511Z",
+				"min_lifetime": 1008,
+				"max_client_to_self_delay": 2016,
+				"min_payment_size_msat": "1000",
+				"max_payment_size_msat": "1000000",
+				"promise": "abcdefghijklmnopqrstuvwxyz"
+			},
+			"payment_size_msat": "42000"
+		}"#;
+		let _buy_request: BuyRequest = serde_json::from_str(json_str).unwrap();
+
+		let json_str = r#"{
+			"jit_channel_scid": "29451x4815x1",
+			"lsp_cltv_expiry_delta" : 144,
+			"client_trusts_lsp": false
+		}"#;
+		let _buy_response: BuyResponse = serde_json::from_str(json_str).unwrap();
+	}
 }
diff --git a/src/lsps2/service.rs b/src/lsps2/service.rs
index 4f1eb59..34025c8 100644
--- a/src/lsps2/service.rs
+++ b/src/lsps2/service.rs
@@ -639,7 +639,7 @@ where
 								.insert_outbound_channel(intercept_scid, outbound_jit_channel);
 
 							let response = LSPS2Response::Buy(BuyResponse {
-								intercept_scid: intercept_scid.into(),
+								jit_channel_scid: intercept_scid.into(),
 								lsp_cltv_expiry_delta: cltv_expiry_delta,
 								client_trusts_lsp,
 							});