LSPS1: Use bitcoin::FeeRate instead of u8

Author: tnull

src/lsps0/ser.rs

@@ -653,3 +653,26 @@ pub(crate) mod string_amount_option {
 		}
 	}
 }
+
+#[cfg(lsps1)]
+pub(crate) mod u32_fee_rate {
+	use bitcoin::FeeRate;
+	use serde::{Deserialize, Deserializer, Serializer};
+
+	pub(crate) fn serialize<S>(x: &FeeRate, s: S) -> Result<S::Ok, S::Error>
+	where
+		S: Serializer,
+	{
+		let fee_rate_sat_kwu = x.to_sat_per_kwu();
+		s.serialize_u32(fee_rate_sat_kwu as u32)
+	}
+
+	pub(crate) fn deserialize<'de, D>(deserializer: D) -> Result<FeeRate, D::Error>
+	where
+		D: Deserializer<'de>,
+	{
+		let fee_rate_sat_kwu = u32::deserialize(deserializer)?;
+
+		Ok(FeeRate::from_sat_per_kwu(fee_rate_sat_kwu as u64))
+	}
+}

src/lsps1/msgs.rs

@@ -1,13 +1,13 @@
 //! Message, request, and other primitive types used to implement LSPS1.
 
 use crate::lsps0::ser::{
-	string_amount, string_amount_option, LSPSMessage, RequestId, ResponseError,
+	string_amount, string_amount_option, u32_fee_rate, LSPSMessage, RequestId, ResponseError,
 };
 
 use crate::prelude::{String, Vec};
 
 use bitcoin::address::{Address, NetworkUnchecked};
-use bitcoin::OutPoint;
+use bitcoin::{FeeRate, OutPoint};
 
 use lightning_invoice::Bolt11Invoice;
 
@@ -170,7 +170,8 @@ pub struct PaymentInfo {
 	pub min_onchain_payment_confirmations: Option<u16>,
 	/// The minimum fee rate for the on-chain payment in case the client wants the payment to be
 	/// confirmed without a confirmation.
-	pub min_fee_for_0conf: u8,
+	#[serde(with = "u32_fee_rate")]
+	pub min_fee_for_0conf: FeeRate,
 	/// Details regarding a detected on-chain payment.
 	pub onchain_payment: Option<OnchainPayment>,
 }