completed inbound pool. Refactored to inbound/outbound semantics.

outbound/errors.go

@@ -0,0 +1,30 @@
+package outbound
+
+import "errors"
+import "fmt"
+
+var (
+	// Config errors
+	InvalidKeepaliveTimeout = errors.New("keepalive timeout cannot be negative")
+	InvalidMaxQueueSize     = errors.New("maximum queue size cannot be negative")
+
+	// Pool errors
+	ErrPoolClosed   = errors.New("pool is closed")
+	ErrPeerNotFound = errors.New("peer not found")
+	ErrPeerExists   = errors.New("peer already exists")
+
+	// Worker errors
+	ErrConnectionUnavailable = errors.New("connection unavailable")
+)
+
+func NewConfigError(err error) error {
+	return fmt.Errorf("configuration error: %w", err)
+}
+
+func NewPoolError(err error) error {
+	return fmt.Errorf("pool error: %w", err)
+}
+
+func NewWorkerError(id string, err error) error {
+	return fmt.Errorf("worker %q error: %w", id, err)
+}