fix: get uxtos stall

CHANGELOG.md

@@ -20,6 +20,7 @@ and this project adheres to the versioning scheme outlined in the [README.md](RE
 ### Changed
 
 - Changed default mempool walk strategy to `NextNonceWithHighestFeeRate`
+- When a previous block commit is unable to be RBFed, the miner will now just wait for it to be confirmed instead of submitting a new block commit which breaks the miner's UTXO chain.
 
 ### Fixed
 

stacks-common/src/util/mod.rs

@@ -77,6 +77,15 @@ pub fn get_epoch_time_ms() -> u128 {
     since_the_epoch.as_millis()
 }
 
+#[cfg(any(test, feature = "testing"))]
+pub fn get_epoch_time_nanos() -> u128 {
+    let start = SystemTime::now();
+    let since_the_epoch = start
+        .duration_since(UNIX_EPOCH)
+        .expect("Time went backwards");
+    since_the_epoch.as_nanos()
+}
+
 pub fn sleep_ms(millis: u64) {
     let t = time::Duration::from_millis(millis);
     thread::sleep(t);