From 4a288db1645ba04c5755e93b565cebb4f2edc652 Mon Sep 17 00:00:00 2001
From: Felipe Andrade <felipe@oplabs.co>
Date: Wed, 6 Sep 2023 15:07:17 -0700
Subject: [PATCH] add cooldown

---
 op-ufm/op-ufm/pkg/provider/roundtrip.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/op-ufm/op-ufm/pkg/provider/roundtrip.go b/op-ufm/op-ufm/pkg/provider/roundtrip.go
index f404f33..aa443f1 100644
--- a/op-ufm/op-ufm/pkg/provider/roundtrip.go
+++ b/op-ufm/op-ufm/pkg/provider/roundtrip.go
@@ -58,6 +58,16 @@ func (p *Provider) RoundTrip(ctx context.Context) {
 	// used for actual round trip time (disregard retry time)
 	roundTripStartedAt := time.Now()
 	for {
+		// sleep until we get a clear to send
+		for {
+			coolDown := time.Duration(p.config.SendTransactionCoolDown) - time.Since(p.txPool.LastSend)
+			if coolDown > 0 {
+				time.Sleep(coolDown)
+			} else {
+				break
+			}
+		}
+
 		tx := p.createTx(nonce)
 		txHash = tx.Hash()