chunk sending (untested)

src/ft_sha1_info.hpp

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <cstddef>
 #include <cstdint>
 #include <array>
 #include <ostream>
@@ -22,6 +23,23 @@ struct SHA1Digest {
 
 std::ostream& operator<<(std::ostream& out, const SHA1Digest& v);
 
+namespace std { // inject
+	template<> struct hash<SHA1Digest> {
+		std::size_t operator()(const SHA1Digest& h) const noexcept {
+			return
+				size_t(h.data[0]) << (0*8) |
+				size_t(h.data[1]) << (1*8) |
+				size_t(h.data[2]) << (2*8) |
+				size_t(h.data[3]) << (3*8) |
+				size_t(h.data[4]) << (4*8) |
+				size_t(h.data[5]) << (5*8) |
+				size_t(h.data[6]) << (6*8) |
+				size_t(h.data[7]) << (7*8)
+			;
+		}
+	};
+} // std
+
 struct FTInfoSHA1 {
 	std::string file_name;
 	uint64_t file_size {0};