[#1213] morph/client: Use a separate cache for every client

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>

pkg/morph/client/constructor.go

@@ -84,7 +84,7 @@ func New(key *keys.PrivateKey, endpoint string, opts ...Option) (*Client, error)
 
 	if cfg.singleCli != nil {
 		return &Client{
-			cache:        initClientCache(),
+			cache:        newClientCache(),
 			singleClient: blankSingleClient(cfg.singleCli, wallet.NewAccountFromPrivateKey(key), cfg),
 		}, nil
 	}
@@ -92,17 +92,17 @@ func New(key *keys.PrivateKey, endpoint string, opts ...Option) (*Client, error)
 	endpoints := append(cfg.extraEndpoints, endpoint)
 
 	return &Client{
+		cache: newClientCache(),
 		multiClient: &multiClient{
-			cfg:         *cfg,
-			account:     wallet.NewAccountFromPrivateKey(key),
-			endpoints:   endpoints,
-			clients:     make(map[string]*Client, len(endpoints)),
-			sharedCache: initClientCache(),
+			cfg:       *cfg,
+			account:   wallet.NewAccountFromPrivateKey(key),
+			endpoints: endpoints,
+			clients:   make(map[string]*Client, len(endpoints)),
 		},
 	}, nil
 }
 
-func initClientCache() cache {
+func newClientCache() cache {
 	c, _ := lru.New(100) // returns error only if size is negative
 	return cache{
 		txHeights: c,

pkg/morph/client/multi.go

@@ -15,8 +15,6 @@ type multiClient struct {
 
 	sharedNotary *notary // notary config needed for single client construction
 
-	sharedCache cache
-
 	endpoints  []string
 	clientsMtx sync.Mutex
 	clients    map[string]*Client
@@ -48,7 +46,7 @@ func (x *multiClient) createForAddress(addr string) (*Client, error) {
 		sCli.notary = x.sharedNotary
 
 		c = &Client{
-			cache:        x.sharedCache,
+			cache:        newClientCache(),
 			singleClient: sCli,
 		}
 		x.clients[addr] = c