added keys.h, sleep_crypto.h; worked sleep.h, sleep_tree.c, sleep_crypto.c

inc/keys.h

@@ -0,0 +1,17 @@
+#ifndef KEYS_H
+#define KEYS_H
+
+#include <stdint.h>
+
+#define SLEEP_PUB_KEY_BYTES	32
+#define SLEEP_SECRET_KEY_BYTES	64
+#define SLEEP_SIGNATURE_BYES	64
+#define SLEEP_BLAKE2B_BYES	32
+
+typedef struct {
+	uint8_t pubkey[SLEEP_PUB_KEY_BYTES];
+	uint8_t seckey[SLEEP_SECRET_KEY_BYES];
+} sleep_keypair_t;
+
+
+#endif /* KEYS_H */