add lock to create-key (#495)

diff --git a/blockchain/pseudohsm/pseudohsm.go b/blockchain/pseudohsm/pseudohsm.go
index 3511558..8bc162f 100644 (file)
--- a/blockchain/pseudohsm/pseudohsm.go
+++ b/blockchain/pseudohsm/pseudohsm.go
@@ -51,6 +51,10 @@ func (h *HSM) XCreate(alias string, auth string) (*XPub, error) {
        if ok := h.cache.hasAlias(alias); ok {
                return nil, ErrDuplicateKeyAlias
        }
+
+       h.cacheMu.Lock()
+       defer h.cacheMu.Unlock()
+
        xpub, _, err := h.createChainKDKey(auth, alias, false)
        if err != nil {
                return nil, err