Function CachedTxIsTrusted

src/wallet/receive.cpp:320–348

}

bool CachedTxIsTrusted(const CWallet& wallet, const CWalletTx& wtx, std::set<uint256>& trusted_parents)
{
    AssertLockHeld(wallet.cs_wallet);
    int nDepth = wallet.GetTxDepthInMainChain(wtx);
    if (nDepth >= 1) return true;
    if (nDepth < 0) return false;
    // using wtx's cached debit
    if (!wallet.m_spend_zero_conf_change || !CachedTxIsFromMe(wallet, wtx, ISMINE_ALL)) return false;

    // Don't trust unconfirmed transactions from us unless they are in the mempool.
    if (!wtx.InMempool()) return false;

    // Trusted if all inputs are from us and are in the mempool:
    for (const CTxIn& txin : wtx.tx->vin)
    {
        // Transactions not sent by us: not trusted
        const CWalletTx* parent = wallet.GetWalletTx(txin.prevout.hash);
        if (parent == nullptr) return false;
        const CTxOut& parentOut = parent->tx->vout[txin.prevout.n];
        // Check that this specific input being spent is trusted
        if (wallet.IsMine(parentOut) != ISMINE_SPENDABLE) return false;
        // If we've already trusted this parent, continue
        if (trusted_parents.count(parent->GetHash())) continue;
        // Recurse to check that the parent is also trusted
        if (!CachedTxIsTrusted(wallet, *parent, trusted_parents)) return false;
        trusted_parents.insert(parent->GetHash());
    }
    return true;
}

bool CachedTxIsTrusted(const CWallet& wallet, const CWalletTx& wtx)
{