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No, if you don’t want to display your IP address, use TOR (or I2P, slightly similar systems).

You can’t ask people to do well to not track you down. When you connect to them they will inevitably see your IP, and there’s nothing you can do to stop them from recording this. When you want to connect to you to other people, you have no choice (have your software) to give them your IP.

The only option is not to use an IP address as a way to identify a node. TOR and I2P are just common ways to achieve just that, but in fact they have drawbacks like increased latency.

Google is introducing a new defense for Android called ‘Developer Verification’ to block malware installations from sideloaded apps sourced from outside the official Google Play app store.

For apps on Google Play, there was already a requirement for publishers to provide a D-U-N-S (Data Universal Numbering System) number, introduced on August 31, 2023.

Google says this has had a notable effect in reducing malware on the platform. However, the system didn’t apply to the vast developer ecosystem outside the app store.

“We’ve seen how malicious actors hide behind anonymity to harm users by impersonating developers and using their brand image to create convincing fake apps,” reads Google’s announcement.

“The scale of this threat is significant: our recent analysis found over 50 times more malware from internet-sideloaded sources than on apps available through Google Play.”

Although the threat is more prevalent outside Google Play, the developer verification requirement applies to both apps on Google Play and apps hosted on third-party app stores.

Starting in 2026, all apps installed on certified Android devices must come from developers who have verified their identity with Google.

Early access to the Developer Verification program will begin this year in October, and the system will open to all Android application developers in March 2026.

In September 2026, the identity verification requirement will become mandatory for Brazil, Indonesia, Singapore, and Thailand, before it rolls out globally in 2027.

The expected effect is to have sideloading, non-compliant apps blocked by the operating system with a security message on certified devices.

Certified Android devices are those that have passed Google’s Compatibility Test Suite (CTS) and are approved to ship with Google Play Services, Play Store, and Play Protect.

In practice, this encompasses all mainstream devices from Samsung, Xiaomi, Motorola, OnePlus, Oppo, Vivo, and the Google Pixel line.

Non-certified devices are those from Huawei, Amazon Fire tablets, and shady Chinese TV boxes or smartphones that use heavily modified OS images and questionable components.

Those devices are not subject to the new rule enforcement, and their users will be able to continue sideloading APKs from unverified and anonymous developers.

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I want a policy to act like that:

• in front Block 1 000 000→2 ‑ 3 Can be used with multi-sign quorum (keys A, B, C).
• At / after Block 1 000 000→ only You can spend on another 2‑ of ‑3 quorum (keys x, y, z). The A/B/C path must be disabled.

Here’s an attempt at naive miniscript:

andor(
  ln:after(1000000),       // height check
  multi(2, X, Y, Z),       // “after” branch
  multi(2, A, B, C)        // “before” branch
)

But I believe after() You can add only conditions. You cannot permanently disable a previous A/B/C branch. Therefore, both 2‑3 quorums remain usable forever.

Is my understanding correct or is there something missing? Do I need a new opcode/softfork to “cancel” my previous spending terms?

It reads the Bitcoin Core LevelDB index (block/index) and uses the Blockstatus flag to determine if the block is valid and part of the active chain.

Currently using the following checks:

if ((BlockStatus & BLOCK_VALID_MASK) >= BLOCK_VALID_CHAIN)

This seems to work for most blocks, but fails at block 0. 11.
As a result, the condition is evaluated error.

I think this is because block 0 is hardcoded and is probably handled differently by core.
So my question is:

1. Is this a reasonable proxy that assumes that the block is fully validated based solely on LevelDB metadata? Or is this check essentially unreliable for that purpose?
2. How does Bitcoin Core handle block status internally for block 0?
3. You must skip block 0 and apply this check only to blocks
   height > 0?

I’m trying to make a rust tool set to read UTXOS directly from the chain state. I mostly follow Bitcoin sources in letters (at least I think so).

I have decode_varint

pub fn decode_varint(data: &(u8)) -> Option<(u32, usize)> {
    let mut n: u32 = 0;
    let mut shift = 0;

    for (i, &byte) in data.iter().enumerate().take(5) {
        let part = (byte & 0x7F) as u32;
        n |= part << shift;

        if byte & 0x80 == 0 {
            return Some((n, i + 1));
        }

        // Bitcoin adds this quirk:
        n = n.wrapping_add(1 << shift);
        shift += 7;
    }

    None
}

I have decompress_amount

pub fn decompress_amount(x: u64) -> u64 {
    if x == 0 {
        return 0;
    }
    let mut x = x - 1;
    let e = x % 10;
    x /= 10;
    let mut n;
    if e < 9 {
        let d = (x % 9) + 1;
        x /= 9;
        n = x * 10 + d;
    } else {
        n = x + 1;
    }
    for _ in 0..e {
        n *= 10;
    }
    n
}

I’m sure I get only UTXO entries

pub fn decode_utxo_key(mut key: &(u8)) -> Option<(Vec, u32)> {
    if key.is_empty() || key(0) != b'C' {
        return None;
    }
    key = &key(1..);
    let txid = key.get(..32)?.to_vec();
    key = &key(32..);
    let (vout, _) = decode_varint(key)?;
    Some((txid, vout as u32))
}

But for some reason, my key shows a TXID that is different from the block height.

Key: `byteskey((67, 0, 0, 0, 0, 236, 58, 152, 94, 229, 61, 50, 239, 22, 75, 88, 246, 154, 181, 7, 146, 209, 249, 113, 25, 180, 120, 10, 150, 150, 112, 118, 209, 0), 98, 112, 112, 118, 209, 095, 112 43, 211, 164, 127, 45, 124, 28, 164, 166, 210, 240, 182, 238, 220, 41, 24, 211, 153, 185, 205, 199))))

TXID: f349b3a497e29738638c27654d3125deb8d90702dc51ab3bc993370900000000

Block 684,608 TXID

I’m getting the XOR obfuscation key:

    let read_opts = ReadOptions::new();
    let xor_iter = db.iter(read_opts);
    let mut obfuscation_key: Vec = Vec::new();

    for (key, value) in xor_iter {
        if key.0.starts_with(&(0x0e)) {
            obfuscation_key = value;
            break;
        }
    }

This returns a decoded value byte as follows: (52, 148, 23, 67, 104 , 115, 134, 222, 130, 10, 78, 153, 93, 115, 228, 159, 196, 86, 17, 179, 224, 72, 222, 228, 185, 255, 26, 46, 229, 73, 140, 125, 129, 241, 246, 106, 170, 3, 94, 35)

But 52 is clearly not the correct byte for block 684,608.

What’s missing?