diff --git a/include/gp/enveloppe/cbor.hpp b/include/gp/enveloppe/cbor.hpp
new file mode 100644
index 0000000..f223c80
--- /dev/null
+++ b/include/gp/enveloppe/cbor.hpp
@@ -0,0 +1,86 @@
+#pragma once
+
+#include <gp/variant.hpp>
+#include <gp/optional.hpp>
+#include <gp/vector.hpp>
+#include <gp/pair.hpp>
+
+
+namespace gp {
+	enum class cbor_type {
+		uint = 0,
+		nint = 1,
+		bstr = 2,
+		tstr = 3,
+		list = 4,
+		hmap = 5,
+		tags = 6,
+		oths = 7
+	};
+
+	enum class cbor_oths {
+		value_false = 20,
+		value_true = 21,
+		value_null = 22,
+		value_undefined = 23,
+		byte = 24,
+		word = 25,
+		dword = 26,
+		qword = 27,
+		terminator = 31
+	};
+
+	enum class cbor_tags {
+		datetime = 0,
+		unix_time = 1,
+		ubignum = 2,
+		nbignum = 3,
+		decimal = 4,
+		bigfloat = 5,
+		cose_encrypt0 = 16,
+		cose_mac0 = 17,
+		cose_sign1 = 18,
+		expected_base64url = 21,
+		expected_base64 = 22,
+		expected_base16 = 23,
+		encoded_cbor = 24,
+		url = 32,
+		base64url = 33,
+		base64 = 34,
+		regexp = 35,
+		mime = 36,
+		cose_encrypt = 96,
+		cose_mac = 97,
+		cose_sign = 98,
+		signature = 55799
+	};
+
+	using cbor_number = gp::fixed_variant<
+		int8_t,
+		uint8_t,
+		int16_t,
+		uint16_t,
+		int32_t,
+		uint32_t,
+		int64_t,
+		uint64_t
+	>; 
+
+	using cbor_floating_point = gp::fixed_variant<
+		float,
+		double
+	>; 
+
+	struct undefined_t{};
+
+	class cbor_value : public gp::fixed_variant<
+		cbor_number,
+		gp::buffer<std::byte>,
+		bool,
+		gp::vector<cbor_value>,
+		gp::vector<gp::pair<cbor_value, cbor_value>>,
+		gp::nullopt_t,
+		undefined_t,
+		cbor_floating_point
+	>{};
+}
\ No newline at end of file