f - check if the Offer supports the chain

Author: jkczyz

lightning/src/ln/channelmanager.rs

@@ -7171,6 +7171,10 @@ where
 		let entropy = &*self.entropy_source;
 		let secp_ctx = &self.secp_ctx;
 
+		if !offer.supports_chain(self.chain_hash) {
+			return Err(Bolt12SemanticError::UnsupportedChain);
+		}
+
 		let builder = offer.request_invoice_deriving_payer_id(
 			expanded_key, entropy, secp_ctx, payment_id
 		)?;