Make BlindedPayInfo fields public

BlindedPayInfo fields need to be public in order to construct one for
fuzz tests. Typically, they would be constructed from ChannelUpdateInfo
for public channels and ChannelDetails for unannounced channels. For
now, make the fields public so they can be constructed manually.

Author: jkczyz

lightning/src/offers/invoice.rs

@@ -571,12 +571,28 @@ type BlindedPayInfoIter<'a> = core::iter::Map<
 /// Information needed to route a payment across a [`BlindedPath`].
 #[derive(Clone, Debug, PartialEq)]
 pub struct BlindedPayInfo {
-	fee_base_msat: u32,
-	fee_proportional_millionths: u32,
-	cltv_expiry_delta: u16,
-	htlc_minimum_msat: u64,
-	htlc_maximum_msat: u64,
-	features: BlindedHopFeatures,
+	/// Base fee charged (in millisatoshi) for the entire blinded path.
+	pub fee_base_msat: u32,
+
+	/// Liquidity fee charged (in millionths of a satoshi) for the entire blinded path (i.e., 10,000
+	/// is 1%).
+	pub fee_proportional_millionths: u32,
+
+	/// Number of blocks subtracted from an incoming HTLC's `cltv_expiry` for the entire blinded
+	/// path.
+	pub cltv_expiry_delta: u16,
+
+	/// The minimum HTLC value (in millisatoshi) that is acceptable to all channel peers on the
+	/// blinded path.
+	pub htlc_minimum_msat: u64,
+
+	/// The maximum HTLC value (in millisatoshi) that is acceptable to all channel peers on the
+	/// blinded path.
+	pub htlc_maximum_msat: u64,
+
+	/// Features set in `encrypted_data_tlv` for the `encrypted_recipient_data` TLV record in an
+	/// onion payload.
+	pub features: BlindedHopFeatures,
 }
 
 impl_writeable!(BlindedPayInfo, {