config update

op-ufm/op-ufm/pkg/config/config.go

@@ -64,6 +64,7 @@ type ProviderConfig struct {
 	SendInterval                 TOMLDuration `toml:"send_interval"`
 	SendTransactionRetryInterval TOMLDuration `toml:"send_transaction_retry_interval"`
 	SendTransactionRetryTimeout  TOMLDuration `toml:"send_transaction_retry_timeout"`
+	SendTransactionCoolDown      TOMLDuration `toml:"send_transaction_cool_down"`
 	ReceiptRetrievalInterval     TOMLDuration `toml:"receipt_retrieval_interval"`
 	ReceiptRetrievalTimeout      TOMLDuration `toml:"receipt_retrieval_timeout"`
 

op-ufm/op-ufm/pkg/provider/tx_pool.go

@@ -16,6 +16,9 @@ type NetworkTransactionPool struct {
 	Transactions map[string]*TransactionState
 	Expected     int
 	Nonce        uint64
+
+	// Last time a transaction was sent
+	LastSend time.Time
 }
 
 type TransactionState struct {