diff --git a/exchanges/okx/okx_types.go b/exchanges/okx/okx_types.go
index 75be135c..d87d3124 100644
--- a/exchanges/okx/okx_types.go
+++ b/exchanges/okx/okx_types.go
@@ -978,16 +978,16 @@ type LightningDepositItem struct {
 
 // CurrencyDepositResponseItem represents the deposit address information item.
 type CurrencyDepositResponseItem struct {
-	Tag                      string `json:"tag"`
-	Chain                    string `json:"chain"`
-	ContractAddress          string `json:"ctAddr"`
-	Currency                 string `json:"ccy"`
-	ToBeneficiaryAccount     string `json:"to"`
-	Address                  string `json:"addr"`
-	Selected                 bool   `json:"selected"`
-	Memo                     string `json:"memo"`
-	DepositAddressAttachment string `json:"addrEx"`
-	PaymentID                string `json:"pmtId"`
+	Tag                      string            `json:"tag"`
+	Chain                    string            `json:"chain"`
+	ContractAddress          string            `json:"ctAddr"`
+	Currency                 string            `json:"ccy"`
+	ToBeneficiaryAccount     string            `json:"to"`
+	Address                  string            `json:"addr"`
+	Selected                 bool              `json:"selected"`
+	Memo                     string            `json:"memo"`
+	DepositAddressAttachment map[string]string `json:"addrEx"`
+	PaymentID                string            `json:"pmtId"`
 }
 
 // DepositHistoryResponseItem deposit history response item.
diff --git a/exchanges/okx/okx_wrapper.go b/exchanges/okx/okx_wrapper.go
index 445cfc05..253c601e 100644
--- a/exchanges/okx/okx_wrapper.go
+++ b/exchanges/okx/okx_wrapper.go
@@ -1453,7 +1453,13 @@ func (ok *Okx) GetAvailableTransferChains(ctx context.Context, cryptocurrency cu
 	}
 	chains := make([]string, 0, len(currencyChains))
 	for x := range currencyChains {
-		if !cryptocurrency.IsEmpty() && !strings.EqualFold(cryptocurrency.String(), currencyChains[x].Currency) {
+		if (!cryptocurrency.IsEmpty() && !strings.EqualFold(cryptocurrency.String(), currencyChains[x].Currency)) ||
+			(!currencyChains[x].CanDeposit && !currencyChains[x].CanWithdraw) ||
+			// Lightning network is currently not supported by transfer chains
+			// as it is an invoice string which is generated per request and is
+			// not a static address. TODO: Add a hook to generate a new invoice
+			// string per request.
+			(currencyChains[x].Chain != "" && currencyChains[x].Chain == "BTC-Lightning") {
 			continue
 		}
 		chains = append(chains, currencyChains[x].Chain)