fix: remove temp file on shutdown

anvil/anvil.go

@@ -93,6 +93,8 @@ func (a *Anvil) Start(ctx context.Context) error {
 
 	if len(a.cfg.GenesisJSON) > 0 && a.cfg.ForkConfig == nil {
 		tempFile, err := os.CreateTemp("", "genesis-*.json")
+		defer a.removeTempFile(tempFile)
+
 		if err != nil {
 			return fmt.Errorf("error creating temporary genesis file: %w", err)
 		}
@@ -122,6 +124,8 @@ func (a *Anvil) Start(ctx context.Context) error {
 
 	// Handle stdout/stderr
 	logFile, err := os.CreateTemp("", fmt.Sprintf("anvil-chain-%d-", a.cfg.ChainID))
+	defer a.removeTempFile(logFile)
+
 	if err != nil {
 		return fmt.Errorf("failed to create temp log file: %w", err)
 	}
@@ -301,3 +305,9 @@ func (a *Anvil) SimulatedLogs(ctx context.Context, tx *types.Transaction) ([]typ
 
 	return logs, err
 }
+
+func (a *Anvil) removeTempFile(tempFile *os.File) {
+	if err := os.Remove(tempFile.Name()); err != nil {
+		a.log.Warn("failed to remove temp genesis file", "file.path", tempFile.Name(), "err", err)
+	}
+}