De-/Serialize addresses assuming their network isn't bogus

.. as we have no real way to check the network at the point of
deserialzation, and we want to handle `bitcoin::Addresses`, not uncheck
addresses, in particular when it comes to serialization.

src/lsps0/ser.rs

@@ -633,6 +633,63 @@ pub(crate) mod string_amount_option {
 	}
 }
 
+pub(crate) mod unchecked_address {
+	use crate::prelude::{String, ToString};
+	use bitcoin::Address;
+	use core::str::FromStr;
+	use serde::de::Unexpected;
+	use serde::{Deserialize, Deserializer, Serializer};
+
+	pub(crate) fn serialize<S>(x: &Address, s: S) -> Result<S::Ok, S::Error>
+	where
+		S: Serializer,
+	{
+		s.serialize_str(&x.to_string())
+	}
+
+	pub(crate) fn deserialize<'de, D>(deserializer: D) -> Result<Address, D::Error>
+	where
+		D: Deserializer<'de>,
+	{
+		let buf = String::deserialize(deserializer)?;
+
+		let parsed_addr = Address::from_str(&buf).map_err(|_| {
+			serde::de::Error::invalid_value(Unexpected::Str(&buf), &"invalid address string")
+		})?;
+		Ok(parsed_addr.assume_checked())
+	}
+}
+
+pub(crate) mod unchecked_address_option {
+	use crate::prelude::{String, ToString};
+	use bitcoin::Address;
+	use core::str::FromStr;
+	use serde::de::Unexpected;
+	use serde::{Deserialize, Deserializer, Serialize, Serializer};
+
+	pub(crate) fn serialize<S>(x: &Option<Address>, s: S) -> Result<S::Ok, S::Error>
+	where
+		S: Serializer,
+	{
+		let v = x.as_ref().map(|v| v.to_string());
+		Option::<String>::serialize(&v, s)
+	}
+
+	pub(crate) fn deserialize<'de, D>(deserializer: D) -> Result<Option<bitcoin::Address>, D::Error>
+	where
+		D: Deserializer<'de>,
+	{
+		if let Some(buf) = Option::<String>::deserialize(deserializer)? {
+			let val = Address::from_str(&buf).map_err(|_| {
+				serde::de::Error::invalid_value(Unexpected::Str(&buf), &"invalid address string")
+			})?;
+			Ok(Some(val.assume_checked()))
+		} else {
+			Ok(None)
+		}
+	}
+}
+
 pub(crate) mod u32_fee_rate {
 	use bitcoin::FeeRate;
 	use serde::{Deserialize, Deserializer, Serializer};

src/lsps1/msgs.rs

@@ -1,11 +1,13 @@
 //! Message, request, and other primitive types used to implement LSPS1.
 
-use crate::lsps0::ser::{string_amount, u32_fee_rate, LSPSMessage, RequestId, ResponseError};
+use crate::lsps0::ser::{
+	string_amount, u32_fee_rate, unchecked_address, unchecked_address_option, LSPSMessage,
+	RequestId, ResponseError,
+};
 
 use crate::prelude::String;
 
-use bitcoin::address::{Address, NetworkUnchecked};
-use bitcoin::{FeeRate, OutPoint};
+use bitcoin::{Address, FeeRate, OutPoint};
 
 use lightning_invoice::Bolt11Invoice;
 
@@ -106,7 +108,8 @@ pub struct OrderParameters {
 	/// May contain arbitrary associated data like a coupon code or a authentication token.
 	pub token: Option<String>,
 	/// The address where the LSP will send the funds if the order fails.
-	pub refund_onchain_address: Option<Address<NetworkUnchecked>>,
+	#[serde(with = "unchecked_address_option")]
+	pub refund_onchain_address: Option<Address>,
 	/// Indicates if the channel should be announced to the network.
 	pub announce_channel: bool,
 }
@@ -182,7 +185,8 @@ pub struct OnchainPaymentInfo {
 	pub order_total_sat: u64,
 	/// An on-chain address the client can send [`Self::order_total_sat`] to to have the channel
 	/// opened.
-	pub address: Address<NetworkUnchecked>,
+	#[serde(with = "unchecked_address")]
+	pub address: Address,
 	/// The minimum number of block confirmations that are required for the on-chain payment to be
 	/// considered confirmed.
 	pub min_onchain_payment_confirmations: Option<u16>,