fix: use nutshell 0.15.2 in itests and adjust tests

docker-compose.yml

@@ -122,7 +122,7 @@ services:
       - itest
 
   nutshell:
-    image: ngutech21/nutshell:latest
+    image: cashubtc/nutshell:0.15.2
     container_name: nutshell
     ports:
       - "2228:3338"

integrationtests/tests/tests_lnd.rs

@@ -102,7 +102,7 @@ async fn test_btc_onchain_mint_melt() -> anyhow::Result<()> {
 
     let btc_address = btc_client.get_new_address()?;
 
-    let melt_amount = 3_000;
+    let melt_amount = 21_000;
     let melt_quotes = wallet
         .get_melt_quote_btconchain(btc_address.clone(), melt_amount)
         .await?;

integrationtests/tests/tests_nutshell_compatibility.rs

@@ -50,17 +50,20 @@ pub async fn test_nutshell_compatibility() -> anyhow::Result<()> {
     let balance = wallet.get_balance().await?;
     assert_eq!(6_000, balance);
 
-    // pay ln-invoice
+    // pay ln-invoice (10_000 invoice + 10 sats fee_reserve / 9 sats get returned)
     let invoice_1000 = read_fixture("invoice_1000.txt")?;
     let quote = wallet
         .get_melt_quote_bolt11(invoice_1000.clone(), CurrencyUnit::Sat)
         .await?;
+    assert_eq!(10, quote.fee_reserve);
     let result_pay_invoice = wallet.pay_invoice(&quote, invoice_1000).await;
+
     if result_pay_invoice.is_err() {
         println!("error in pay_invoice{:?}", result_pay_invoice);
     }
     assert!(result_pay_invoice.is_ok());
+    assert_eq!(9, result_pay_invoice?.1);
     let balance = wallet.get_balance().await?;
-    assert_eq!(5_000, balance);
+    assert_eq!(4_999, balance);
     Ok(())
 }