refactor: use Span in random.*

src/key.cpp

@@ -159,7 +159,7 @@ bool CKey::Check(const unsigned char *vch) {
 
 void CKey::MakeNewKey(bool fCompressedIn) {
     do {
-        GetStrongRandBytes(keydata.data(), keydata.size());
+        GetStrongRandBytes(keydata);
     } while (!Check(keydata.data()));
     fValid = true;
     fCompressed = fCompressedIn;
@@ -244,7 +244,7 @@ bool CKey::VerifyPubKey(const CPubKey& pubkey) const {
     }
     unsigned char rnd[8];
     std::string str = "Bitcoin key verification\n";
-    GetRandBytes(rnd, sizeof(rnd));
+    GetRandBytes(rnd);
     uint256 hash;
     CHash256().Write(MakeUCharSpan(str)).Write(rnd).Finalize(hash);
     std::vector<unsigned char> vchSig;
@@ -397,7 +397,7 @@ void ECC_Start() {
     {
         // Pass in a random blinding seed to the secp256k1 context.
         std::vector<unsigned char, secure_allocator<unsigned char>> vseed(32);
-        GetRandBytes(vseed.data(), 32);
+        GetRandBytes(vseed);
         bool ret = secp256k1_context_randomize(ctx, vseed.data());
         assert(ret);
     }