f - rename payer_note

Author: jkczyz

lightning/src/ln/offers_tests.rs

@@ -416,7 +416,7 @@ fn creates_and_pays_for_offer_using_two_hop_blinded_path() {
 			amount_msats: None,
 			features: InvoiceRequestFeatures::empty(),
 			quantity: None,
-			payer_note: None,
+			payer_note_truncated: None,
 		},
 	});
 	assert_eq!(invoice_request.amount_msats(), None);
@@ -570,7 +570,7 @@ fn creates_and_pays_for_offer_using_one_hop_blinded_path() {
 			amount_msats: None,
 			features: InvoiceRequestFeatures::empty(),
 			quantity: None,
-			payer_note: None,
+			payer_note_truncated: None,
 		},
 	});
 	assert_eq!(invoice_request.amount_msats(), None);
@@ -693,7 +693,7 @@ fn pays_for_offer_without_blinded_paths() {
 			amount_msats: None,
 			features: InvoiceRequestFeatures::empty(),
 			quantity: None,
-			payer_note: None,
+			payer_note_truncated: None,
 		},
 	});
 

lightning/src/offers/invoice_request.rs

@@ -887,7 +887,8 @@ impl VerifiedInvoiceRequest {
 			amount_msats: *amount_msats,
 			features: features.clone(),
 			quantity: *quantity,
-			payer_note: payer_note.clone().map(|mut s| { s.truncate(512); UntrustedString(s) }),
+			payer_note_truncated: payer_note.clone()
+				.map(|mut s| { s.truncate(PAYER_NOTE_LIMIT); UntrustedString(s) }),
 		}
 	}
 }
@@ -1142,10 +1143,13 @@ pub struct InvoiceRequestFields {
 	pub quantity: Option<u64>,
 
 	/// A payer-provided note which will be seen by the recipient and reflected back in the invoice
-	/// response.
-	pub payer_note: Option<UntrustedString>,
+	/// response. Truncated to [`PAYER_NOTE_LIMIT`] characters.
+	pub payer_note_truncated: Option<UntrustedString>,
 }
 
+/// The maximum number of characters included in [`InvoiceRequestFields::payer_note_truncated`].
+pub const PAYER_NOTE_LIMIT: usize = 512;
+
 impl Writeable for InvoiceRequestFields {
 	fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
 		write_tlv_fields!(writer, {
@@ -1154,7 +1158,7 @@ impl Writeable for InvoiceRequestFields {
 			(4, self.amount_msats, option),
 			(6, WithoutLength(&self.features), required),
 			(8, self.quantity, option),
-			(10, self.payer_note, option),
+			(10, self.payer_note_truncated, option),
 		});
 		Ok(())
 	}
@@ -1168,19 +1172,20 @@ impl Readable for InvoiceRequestFields {
 			(4, amount_msats, option),
 			(6, features, (option, encoding: (InvoiceRequestFeatures, WithoutLength))),
 			(8, quantity, option),
-			(10, payer_note, option),
+			(10, payer_note_truncated, option),
 		});
 		let features = features.unwrap_or(InvoiceRequestFeatures::empty());
 
 		Ok(InvoiceRequestFields {
-			payer_id: payer_id.0.unwrap(), chain, amount_msats, features, quantity, payer_note
+			payer_id: payer_id.0.unwrap(), chain, amount_msats, features, quantity,
+			payer_note_truncated,
 		})
 	}
 }
 
 #[cfg(test)]
 mod tests {
-	use super::{InvoiceRequest, InvoiceRequestFields, InvoiceRequestTlvStreamRef, SIGNATURE_TAG, UnsignedInvoiceRequest};
+	use super::{InvoiceRequest, InvoiceRequestFields, InvoiceRequestTlvStreamRef, PAYER_NOTE_LIMIT, SIGNATURE_TAG, UnsignedInvoiceRequest};
 
 	use bitcoin::blockdata::constants::ChainHash;
 	use bitcoin::network::constants::Network;
@@ -2268,7 +2273,7 @@ mod tests {
 			.chain(Network::Testnet).unwrap()
 			.amount_msats(1001).unwrap()
 			.quantity(1).unwrap()
-			.payer_note("0".repeat(1024))
+			.payer_note("0".repeat(PAYER_NOTE_LIMIT * 2))
 			.build().unwrap()
 			.sign(payer_sign).unwrap();
 		match invoice_request.verify(&expanded_key, &secp_ctx) {
@@ -2282,7 +2287,7 @@ mod tests {
 						amount_msats: Some(1001),
 						features: InvoiceRequestFeatures::empty(),
 						quantity: Some(1),
-						payer_note: Some(UntrustedString("0".repeat(512))),
+						payer_note_truncated: Some(UntrustedString("0".repeat(PAYER_NOTE_LIMIT))),
 					}
 				);
 			},