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-rw-r--r--src/random.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/src/random.h b/src/random.h
index 0e8bb27176..29de587312 100644
--- a/src/random.h
+++ b/src/random.h
@@ -46,7 +46,11 @@ public:
uint32_t Rw;
};
-/* Number of random bytes returned by GetOSRand */
+/* Number of random bytes returned by GetOSRand.
+ * When changing this constant make sure to change all call sites, and make
+ * sure that the underlying OS APIs for all platforms support the number.
+ * (many cap out at 256 bytes).
+ */
static const ssize_t NUM_OS_RANDOM_BYTES = 32;
/** Get 32 bytes of system entropy. Do not use this in application code: use