mint not responding error

Cargo.toml

@@ -26,6 +26,7 @@ getrandom = { version = "0.2", features = ["js"] }
 serde = { version = "1.0.160", features = ["derive"]}
 serde_json = "1.0.96"
 url = "2.3.1"
+regex = "1.8.4"
 
 [dev-dependencies]
 tokio = {version = "1.27.0", features = ["rt", "macros"] }

src/client.rs

@@ -13,12 +13,14 @@ use crate::{
         CheckSpendableRequest, CheckSpendableResponse, MeltRequest, MeltResponse, MintInfo,
         MintRequest, PostMintResponse, Proof, RequestMintResponse, SplitRequest, SplitResponse,
     },
+    utils,
 };
 use serde::{Deserialize, Serialize};
 
 #[derive(Debug)]
 pub enum Error {
     InvoiceNotPaid,
+    LightingWalletNotResponding(Option<String>),
     /// Parse Url Error
     UrlParseError(url::ParseError),
     /// Serde Json error
@@ -53,6 +55,13 @@ impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
             Error::InvoiceNotPaid => write!(f, "Invoice not paid"),
+            Error::LightingWalletNotResponding(mint) => {
+                write!(
+                    f,
+                    "Lightning Wallet not responding: {}",
+                    mint.clone().unwrap_or("".to_string())
+                )
+            }
             Error::UrlParseError(err) => write!(f, "{}", err),
             Error::SerdeJsonError(err) => write!(f, "{}", err),
             Error::MinReqError(err) => write!(f, "{}", err),
@@ -71,9 +80,13 @@ impl Error {
     pub fn from_json(json: &str) -> Result<Self, Error> {
         let mint_res: MintErrorResponse = serde_json::from_str(json)?;
 
-        let mint_error = match mint_res.error.as_str() {
-            "Lightning invoice not paid yet." => Error::InvoiceNotPaid,
-            _ => Error::Custom(mint_res.error),
+        let mint_error = match mint_res.error {
+            error if error.starts_with("Lightning invoice not paid yet.") => Error::InvoiceNotPaid,
+            error if error.starts_with("Lightning wallet not responding") => {
+                let mint = utils::extract_url_from_error(&error);
+                Error::LightingWalletNotResponding(mint)
+            }
+            error => Error::Custom(error),
         };
         Ok(mint_error)
     }
@@ -304,6 +317,13 @@ mod tests {
             _ => panic!("Wrong error"),
         }
 
-        // assert_eq!(error, Error::InvoiceNotPaid);
+        let err = r#"{"code": 0, "error": "Lightning wallet not responding: Failed to connect to https://legend.lnbits.com due to: All connection attempts failed"}"#;
+        let error = Error::from_json(err).unwrap();
+        match error {
+            Error::LightingWalletNotResponding(mint) => {
+                assert_eq!(mint, Some("https://legend.lnbits.com".to_string()));
+            }
+            _ => panic!("Wrong error"),
+        }
     }
 }

src/utils.rs

@@ -3,6 +3,7 @@
 use base64::{engine::general_purpose, Engine as _};
 use bitcoin::Amount;
 use rand::prelude::*;
+use regex::Regex;
 
 /// Split amount into cashu denominations (powers of 2)
 pub fn split_amount(amount: Amount) -> Vec<Amount> {
@@ -17,6 +18,14 @@ pub fn split_amount(amount: Amount) -> Vec<Amount> {
     chunks
 }
 
+pub fn extract_url_from_error(error: &str) -> Option<String> {
+    let regex = Regex::new(r"https?://[^\s]+").unwrap();
+    if let Some(capture) = regex.captures(error) {
+        return Some(capture[0].to_owned());
+    }
+    None
+}
+
 /// Generate Secret Message
 pub fn generate_secret() -> String {
     let mut rng = rand::thread_rng();