feat: add mints_strict field to payment requests

crates/cashu/examples/payment_request_encoding_benchmark.rs

@@ -94,6 +94,8 @@ fn minimal_comparison() -> Result<(), Box<dyn std::error::Error>> {
         unit: None,
         single_use: None,
         mints: vec![MintUrl::from_str("https://mint.example.com")?],
+        mint_preferred: None,
+        supported_methods: vec![],
         description: None,
         transports: vec![],
         nut10: None,
@@ -110,6 +112,8 @@ fn amount_unit_comparison() -> Result<(), Box<dyn std::error::Error>> {
         unit: Some(CurrencyUnit::Sat),
         single_use: None,
         mints: vec![MintUrl::from_str("https://mint.example.com")?],
+        mint_preferred: None,
+        supported_methods: vec![],
         description: None,
         transports: vec![],
         nut10: None,
@@ -131,6 +135,8 @@ fn multiple_mints_comparison() -> Result<(), Box<dyn std::error::Error>> {
             MintUrl::from_str("https://mint3.example.com")?,
             MintUrl::from_str("https://backup-mint.cashu.space")?,
         ],
+        mint_preferred: None,
+        supported_methods: vec![],
         description: Some("Payment with multiple mint options".to_string()),
         transports: vec![],
         nut10: None,
@@ -156,6 +162,8 @@ fn transport_comparison() -> Result<(), Box<dyn std::error::Error>> {
         unit: Some(CurrencyUnit::Sat),
         single_use: Some(true),
         mints: vec![MintUrl::from_str("https://mint.example.com")?],
+        mint_preferred: None,
+        supported_methods: vec![],
         description: Some("Payment with callback transport".to_string()),
         transports: vec![transport],
         nut10: None,
@@ -193,6 +201,8 @@ fn complete_with_nut10_comparison() -> Result<(), Box<dyn std::error::Error>> {
             MintUrl::from_str("https://mint1.example.com")?,
             MintUrl::from_str("https://mint2.example.com")?,
         ],
+        mint_preferred: None,
+        supported_methods: vec![],
         description: Some("Complete payment with P2PK locking and refund key".to_string()),
         transports: vec![transport],
         nut10: Some(nut10),
@@ -245,6 +255,8 @@ fn very_complex_comparison() -> Result<(), Box<dyn std::error::Error>> {
             MintUrl::from_str("https://backup-mint-2.example.net")?,
             MintUrl::from_str("https://emergency-mint.example.io")?,
         ],
+        mint_preferred: None,
+        supported_methods: vec![],
         description: Some("Complex payment with multiple mints and transports".to_string()),
         transports: vec![transport1, transport2],
         nut10: Some(nut10),
@@ -503,6 +515,8 @@ mod tests {
             unit: Some(CurrencyUnit::Sat),
             single_use: None,
             mints: vec![MintUrl::from_str("https://mint.example.com").unwrap()],
+            mint_preferred: None,
+            supported_methods: vec![],
             description: Some("Test".to_string()),
             transports: vec![],
             nut10: None,

crates/cashu/src/nuts/mod.rs

@@ -73,8 +73,8 @@ pub use nut14::HTLCWitness;
 pub use nut15::{Mpp, MppMethodSettings, Settings as NUT15Settings};
 pub use nut17::NotificationPayload;
 pub use nut18::{
-    Nut10SecretRequest, PaymentRequest, PaymentRequestBuilder, PaymentRequestPayload, Transport,
-    TransportBuilder, TransportType,
+    Nut10SecretRequest, PaymentRequest, PaymentRequestBuilder, PaymentRequestPayload,
+    SupportedMethod, Transport, TransportBuilder, TransportType,
 };
 pub use nut23::{
     MeltOptions, MeltQuoteBolt11Request, MeltQuoteBolt11Response, MintQuoteBolt11Request,

crates/cashu/src/nuts/nut18/mod.rs

@@ -11,6 +11,8 @@ pub mod secret;
 pub mod transport;
 
 pub use error::Error;
-pub use payment_request::{PaymentRequest, PaymentRequestBuilder, PaymentRequestPayload};
+pub use payment_request::{
+    PaymentRequest, PaymentRequestBuilder, PaymentRequestPayload, SupportedMethod,
+};
 pub use secret::Nut10SecretRequest;
 pub use transport::{Transport, TransportBuilder, TransportType};