Method BuildWtxidTest

src/test/txrequest_tests.cpp:509–576

Add to scenario a test that verifies behavior related to both txid and wtxid with the same * hash being announced. * * config is an integer in [0, 4) inclusive, and selects the variant of the test used. */

 *  config is an integer in [0, 4) inclusive, and selects the variant of the test used.
*/
void TxRequestTest::BuildWtxidTest(Scenario& scenario, int config)
{
    scenario.SetTestName(strprintf("Wtxid(config=%i)", config));

    auto peerT = scenario.NewPeer();
    auto peerW = scenario.NewPeer();
    auto txhash = scenario.NewTxHash();
    auto txid{Txid::FromUint256(txhash)};
    auto wtxid{Wtxid::FromUint256(txhash)};

    auto reqtimeT = m_rng.randbool() ? MIN_TIME : scenario.Now() + RandomTime8s();
    auto reqtimeW = m_rng.randbool() ? MIN_TIME : scenario.Now() + RandomTime8s();

    // Announce txid first or wtxid first.
    if (config & 1) {
        scenario.ReceivedInv(peerT, txid, config & 2, reqtimeT);
        if (m_rng.randbool()) scenario.AdvanceTime(RandomTime8s());
        scenario.ReceivedInv(peerW, wtxid, !(config & 2), reqtimeW);
    } else {
        scenario.ReceivedInv(peerW, wtxid, !(config & 2), reqtimeW);
        if (m_rng.randbool()) scenario.AdvanceTime(RandomTime8s());
        scenario.ReceivedInv(peerT, txid, config & 2, reqtimeT);
    }

    // Let time pass if needed, and check that the preferred announcement (txid or wtxid)
    // is correctly to-be-requested (and with the correct wtxidness).
    auto max_reqtime = std::max(reqtimeT, reqtimeW);
    if (max_reqtime > scenario.Now()) scenario.AdvanceTime(max_reqtime - scenario.Now());
    if (config & 2) {
        scenario.Check(peerT, {txid}, 1, 0, 0, "w1");
        scenario.Check(peerW, {}, 1, 0, 0, "w2");
    } else {
        scenario.Check(peerT, {}, 1, 0, 0, "w3");
        scenario.Check(peerW, {wtxid}, 1, 0, 0, "w4");
    }

    // Let the preferred announcement be requested. It's not going to be delivered.
    auto expiry = RandomTime8s();
    if (config & 2) {
        scenario.RequestedTx(peerT, txid.ToUint256(), scenario.Now() + expiry);
        scenario.Check(peerT, {}, 0, 1, 0, "w5");
        scenario.Check(peerW, {}, 1, 0, 0, "w6");
    } else {
        scenario.RequestedTx(peerW, wtxid.ToUint256(), scenario.Now() + expiry);
        scenario.Check(peerT, {}, 1, 0, 0, "w7");
        scenario.Check(peerW, {}, 0, 1, 0, "w8");
    }

    // After reaching expiration time of the preferred announcement, verify that the
    // remaining one is requestable
    scenario.AdvanceTime(expiry);
    if (config & 2) {
        scenario.Check(peerT, {}, 0, 0, 1, "w9");
        scenario.Check(peerW, {wtxid}, 1, 0, 0, "w10");
        scenario.CheckExpired(peerT, txid);
    } else {
        scenario.Check(peerT, {txid}, 1, 0, 0, "w11");
        scenario.Check(peerW, {}, 0, 0, 1, "w12");