1 files changed, 35 insertions, 0 deletions
diff --git a/vendor/open-telemetry/api/Trace/SpanContextValidator.php b/vendor/open-telemetry/api/Trace/SpanContextValidator.php
new file mode 100644
index 000000000..09b39f6d8
--- /dev/null
+++ b/vendor/open-telemetry/api/Trace/SpanContextValidator.php
@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenTelemetry\API\Trace;
+
+use function strlen;
+use function strtolower;
+
+class SpanContextValidator
+{
+    public const VALID_SPAN = '/^[0-9a-f]{16}$/';
+    public const VALID_TRACE = '/^[0-9a-f]{32}$/';
+    public const INVALID_SPAN = '0000000000000000';
+    public const INVALID_TRACE = '00000000000000000000000000000000';
+    public const SPAN_LENGTH = 16;
+    public const TRACE_LENGTH = 32;
+    public const SPAN_LENGTH_BYTES = 8;
+
+    /**
+     * @return bool Returns a value that indicates whether a trace id is valid
+     */
+    public static function isValidTraceId(string $traceId): bool
+    {
+        return ctype_xdigit($traceId) && strlen($traceId) === self::TRACE_LENGTH && $traceId !== self::INVALID_TRACE && $traceId === strtolower($traceId);
+    }
+
+    /**
+     * @return bool Returns a value that indicates whether a span id is valid
+     */
+    public static function isValidSpanId(string $spanId): bool
+    {
+        return ctype_xdigit($spanId) && strlen($spanId) === self::SPAN_LENGTH && $spanId !== self::INVALID_SPAN && $spanId === strtolower($spanId);
+    }
+}