Function TestWatchOnlyPubKey

src/wallet/test/wallet_tests.cpp:436–465

Test some watch-only LegacyScriptPubKeyMan methods by the procedure of loading (LoadWatchOnly), checking (HaveWatchOnly), getting (GetWatchPubKey) and removing (RemoveWatchOnly) a given PubKey, resp. its corresponding P2PK Script. Results of the impact on the address -> PubKey map is dependent on whether the PubKey is a point on the curve

// given PubKey, resp. its corresponding P2PK Script. Results of the impact on
// the address -> PubKey map is dependent on whether the PubKey is a point on the curve
static void TestWatchOnlyPubKey(LegacyScriptPubKeyMan* spk_man, const CPubKey& add_pubkey)
{
    CScript p2pk = GetScriptForRawPubKey(add_pubkey);
    CKeyID add_address = add_pubkey.GetID();
    CPubKey found_pubkey;
    LOCK(spk_man->cs_KeyStore);

    // all Scripts (i.e. also all PubKeys) are added to the general watch-only set
    BOOST_CHECK(!spk_man->HaveWatchOnly(p2pk));
    spk_man->LoadWatchOnly(p2pk);
    BOOST_CHECK(spk_man->HaveWatchOnly(p2pk));

    // only PubKeys on the curve shall be added to the watch-only address -> PubKey map
    bool is_pubkey_fully_valid = add_pubkey.IsFullyValid();
    if (is_pubkey_fully_valid) {
        BOOST_CHECK(spk_man->GetWatchPubKey(add_address, found_pubkey));
        BOOST_CHECK(found_pubkey == add_pubkey);
    } else {
        BOOST_CHECK(!spk_man->GetWatchPubKey(add_address, found_pubkey));
        BOOST_CHECK(found_pubkey == CPubKey()); // passed key is unchanged
    }

    spk_man->RemoveWatchOnly(p2pk);
    BOOST_CHECK(!spk_man->HaveWatchOnly(p2pk));

    if (is_pubkey_fully_valid) {
        BOOST_CHECK(!spk_man->GetWatchPubKey(add_address, found_pubkey));
        BOOST_CHECK(found_pubkey == add_pubkey); // passed key is unchanged
    }
}

// Cryptographically invalidate a PubKey whilst keeping length and first byte
static void PollutePubKey(CPubKey& pubkey)