fix: resolve flakey ci tests

Before minting the quote wait till the status of the quote is paid

crates/cdk-integration-tests/tests/fake_wallet.rs

@@ -5,7 +5,9 @@ use bip39::Mnemonic;
 use cdk::{
     amount::SplitTarget,
     cdk_database::WalletMemoryDatabase,
-    nuts::{CurrencyUnit, MeltBolt11Request, MeltQuoteState, PreMintSecrets, State},
+    nuts::{
+        CurrencyUnit, MeltBolt11Request, MeltQuoteState, MintQuoteState, PreMintSecrets, State,
+    },
     wallet::{
         client::{HttpClient, HttpClientMethods},
         Wallet,
@@ -30,7 +32,7 @@ async fn test_fake_tokens_pending() -> Result<()> {
 
     let mint_quote = wallet.mint_quote(100.into(), None).await?;
 
-    sleep(Duration::from_millis(5)).await;
+    wait_for_mint_to_be_paid(&wallet, &mint_quote.id).await?;
 
     let _mint_amount = wallet
         .mint(&mint_quote.id, SplitTarget::default(), None)
@@ -70,7 +72,7 @@ async fn test_fake_melt_payment_fail() -> Result<()> {
 
     let mint_quote = wallet.mint_quote(100.into(), None).await?;
 
-    sleep(Duration::from_millis(5)).await;
+    wait_for_mint_to_be_paid(&wallet, &mint_quote.id).await?;
 
     let _mint_amount = wallet
         .mint(&mint_quote.id, SplitTarget::default(), None)
@@ -133,7 +135,7 @@ async fn test_fake_melt_payment_fail_and_check() -> Result<()> {
 
     let mint_quote = wallet.mint_quote(100.into(), None).await?;
 
-    sleep(Duration::from_millis(5)).await;
+    wait_for_mint_to_be_paid(&wallet, &mint_quote.id).await?;
 
     let _mint_amount = wallet
         .mint(&mint_quote.id, SplitTarget::default(), None)
@@ -178,7 +180,7 @@ async fn test_fake_melt_payment_return_fail_status() -> Result<()> {
 
     let mint_quote = wallet.mint_quote(100.into(), None).await?;
 
-    sleep(Duration::from_millis(5)).await;
+    wait_for_mint_to_be_paid(&wallet, &mint_quote.id).await?;
 
     let _mint_amount = wallet
         .mint(&mint_quote.id, SplitTarget::default(), None)
@@ -238,7 +240,7 @@ async fn test_fake_melt_payment_error_unknown() -> Result<()> {
 
     let mint_quote = wallet.mint_quote(100.into(), None).await?;
 
-    sleep(Duration::from_millis(5)).await;
+    wait_for_mint_to_be_paid(&wallet, &mint_quote.id).await?;
 
     let _mint_amount = wallet
         .mint(&mint_quote.id, SplitTarget::default(), None)
@@ -299,7 +301,7 @@ async fn test_fake_melt_payment_err_paid() -> Result<()> {
 
     let mint_quote = wallet.mint_quote(100.into(), None).await?;
 
-    sleep(Duration::from_millis(5)).await;
+    wait_for_mint_to_be_paid(&wallet, &mint_quote.id).await?;
 
     let _mint_amount = wallet
         .mint(&mint_quote.id, SplitTarget::default(), None)
@@ -337,7 +339,7 @@ async fn test_fake_melt_change_in_quote() -> Result<()> {
 
     let mint_quote = wallet.mint_quote(100.into(), None).await?;
 
-    sleep(Duration::from_millis(5)).await;
+    wait_for_mint_to_be_paid(&wallet, &mint_quote.id).await?;
 
     let _mint_amount = wallet
         .mint(&mint_quote.id, SplitTarget::default(), None)
@@ -377,3 +379,15 @@ async fn test_fake_melt_change_in_quote() -> Result<()> {
     assert_eq!(melt_change, check);
     Ok(())
 }
+
+// Keep polling the state of the mint quote id until it's paid
+async fn wait_for_mint_to_be_paid(wallet: &Wallet, mint_quote_id: &str) -> Result<()> {
+    loop {
+        let status = wallet.mint_quote_state(mint_quote_id).await?;
+        if status.state == MintQuoteState::Paid {
+            return Ok(());
+        }
+
+        sleep(Duration::from_millis(5)).await;
+    }
+}