You're weird, man. You've been saying you'll be posting details about the project soon for over a week, and you haven't posted anything yet. Is your project that secret?
If you're afraid of your ideas being stolen, you don't have to post all the details, but rather a general idea about the project so members can help you. This is the development section, where ideas that could enrich your project and give you new insights are discussed.


So why don't you use AI to program the tasks you want? You can also use it in marketing; you don't need anyone else in that case.

Hey Bitcointalk,

I'm working on designing a P2P Bitcoin exchange focused on cashout to bank transfer, PayPal, and similar fiat methods — think Paxful-style, but with greater transparency, wallet isolation, and internal traceability.

Here’s what sets my design apart:

📦 Each user gets a unique Bitcoin wallet address (on-chain) at registration.

🔐 No pooling of funds. Every UTXO is tracked by original owner and current holder.

📗 Trades are off-chain (ledger-based). BTC only moves on-chain during deposit and withdrawal.

🧾 I want full AML traceability: I can tell who originally deposited the BTC and who owns it at any point.

💸 Users pay no network fees when trading — only when withdrawing.

✅ Example Scenario
Let me walk you through a case that illustrates what I’m building:

John deposits 0.01 BTC into his assigned BTC address. The funds are now UTXOs controlled by the platform but credited to John's balance internally.

James also deposits 0.02 BTC into his own wallet address, completely separate.

Harry hasn't deposited anything, but he creates a trade to buy 0.005 BTC from John via bank transfer.

When Harry completes the fiat payment, ownership of 0.005 BTC (from John’s UTXOs) is transferred to Harry inside the internal ledger — no on-chain tx yet.

Now:

John has 0.005 BTC remaining

Harry owns 0.005 BTC internally

James still has 0.02 BTC, untouched

Later, Harry wants to sell that 0.005 BTC to someone else or withdraw it.

Here’s my core constraint:

When the next person receives BTC (either through trade or withdrawal), it must be the exact same BTC originally deposited by John — not from James or a general pool.

So when Harry withdraws, I want to ensure the withdrawal is signed using John’s wallet key, since that UTXO technically still resides in John’s wallet (now owned by Harry).

🤔 What I Need Feedback On:

Does this model make sense in terms of security, scalability, and UTXO tracking?

Is it acceptable that ownership transfers are purely internal until withdrawal?

Should I fragment UTXOs when trading portions (e.g., 0.005 BTC from a 0.01 UTXO)?

Are there good practices or known issues with tracking UTXOs per user without pooling?

Should I eventually consolidate UTXOs from dormant users or avoid that to preserve isolation?

Would love any input, warnings, or suggestions from devs who've built P2P exchanges or non-custodial systems before. Thanks in advance.

Edit:

I'm exploring a P2P offer approach where:

1) The buyer can verify the seller's Bitcoin address and confirm the spendable BTC they’re about to receive.

2) If issues arise or suspects funds are tainted, the buyer can request KYC from the seller. The seller can refuse, and the buyer may choose another seller.

3) For privacy, a new deposit address is generated after each deposit.

4) The buyer can audit the deposit transaction and verify the source of funds.

This ensures transparency while letting the buyer take full responsibility for the BTC they receive.

Some quick first thoughts:

1. I'm required to provide a refund address for all three BTC, USDT, and XMR. Sometimes I just want to trade BTC<>USDT and don't have a XMR wallet... or want to trade XMR<>USDT and I don't have a BTC wallet.
2. The USDT network isn't specified on the refund addresses page. Is it ETH? Polygon? BSC? I saw later that you use Polygon, probably better to specify that on the refund addresses page.
3. After providing the refund addresses, it says I can deposit but there is no button to go on (or automatic redirect). Add a link/button next to "you can deposit" that takes the user to the deposit page.

This could happen at any point you go open source. But I will keep tabs with your progress to know if it is opened at any point in the future.

Do I need to confirm my email address on registration or can I use a throwaway addy to sign up?

- Jay -

I like the website design, it looks very good for a single developer and is also mobile friendly which is impressive.

I have not gotten any of the testnet coins yet, I will want to be sure I will be using them before getting some, but the ToS, privacy policy and other features are privacy inclined. There is the fact that we are trusting your word for it and there is no way to really know how much data is collected, so it will need to be functional for a while for the public to assess how it operates.

- Jay -

This is a bitcoin forum, we are here to be your friends as long as you do not try to do anything stupid like trying to scam or doing something similar. If you are here about bitcoin discussion, we are your friends.

About what you talked about, your friends does not need to agree with you in everything you said. Also you do not need to agree with them. That does not mean you are not friends.

Most of us here had rugged past with crypto dealings, you don't need to convince them, you can point them to Bitcoin price history to see for themselves and ask them to do their own research. It's very wrong to blame Bitcoin since they didn't buy any instead they were fucking around with pump and dump shitcoins and it's associates.

In this case you don't need to argue, it's pointless. Give them the price history and ask them to monitor the performance in this bull run. I have been arguing with my sister from last year to buy Bitcoin, but she holds past aggression from her shitcoins involvement. I simply asked her at the beginning of the year to observe Bitcoin during this bull run and see what she's missing. I just got off the call with her two days ago with her telling me that she must buy at least $50k worth of Bitcoin next year.

Most times arguing is pointless, direct them to the right information source and they would do the convincing themselves.

coreswap.io scam us for 5k+ not answering

Please help anyone

Hi guys , hope this is the right section
So I'm looking for either one of these
- there was an privacy orientated VPN, I forgot their name, you could pay monthly at the same price as yearly, and the distinctive feature about them at least a year ago it was that they bragged you could still send them cash in mail, I can't remember their name or bookmark or anything no matter what
- second a VPN with servers somewhere in Benelux that has indeed speeds for 2k, no 20 times buffering for a minute of 2k video

Hope somebody can be of help!

So basically, the system says record xxx has malfunctioned - here are the anonymized details.   Your support rep then goes to the database to research the record, where he/she has access to all PII (including IP addresses)?  You are not anonymising data if you provide a unique record.

Unless you provide column level restrictions on your database, you cannot say the data is anonymized any more than any other system - understand?  Again, I would completely do away with that "technobabble", as without KYC anyone running this script is breaking US law.  Take resources you would spend on that, and remove all custody through smart contracts - IMO that is the winner feature!

These tools are useful and sometimes it costs money. So having free information was not bad if this was only about information instead of encouraging to report addresses and help those companies to build their database. I wonder how much they are getting paid from these AML Risk Scorers and AML Analysis agencies.

I keep getting an "Onion site not found" error whenever I try to access their site using Tor. Is anyone else experiencing the same issue?

After several attempts, it finally went through.

One of our customer btc coin that sent to us  



100% high risk by AMLCrypto.io versus 68% medium risk by MatchSystems

i believe each provider designs and applies their risk models and data sources different and not same.

I agree with Hatchy, two speed options would be enough. Fast and slow.  A "fast" option would mean paying a premium fee, ensuring inclusion in the next few blocks. A "slow" option would mean being part of the regular batched transactions.

The second suggestion, using multiple hot wallets, may not be an ideal solution because it increases the attack surface and adds layers of complexity. I think better UTXO management would be a smarter solution.  By creating multiple, roughly equal-sized UTXOs, you can select the most appropriate number of UTXOs for the exact amount being withdrawn, minimizing the size of the transaction (and thus the fee) for a given speed. This will also allow you to service a "fast" withdrawal without necessarily needing to wait for a change output from a larger, slower batch transaction.

It's quite complex to add this features to a centralized exchange because of the large number of traders you'd be handling. Most centralized exchanges have likely considered this which is why you don't typically see these features. When you place withdrawal you usually only get an estimated fee not an idea of how quickly your funds will arrive. I believe other CEXs handle this by batching multiple transactions and broadcasting them all at once.

I have two suggestions for you. First you could offer two withdrawal speed options, fast and medium. There's no need for a slow option. This would allow you to focus on prioritizing your unspent transaction outputs more effectively. You would also need to increase your UTXO reserves so there are enough funds for medium speed withdrawals without waiting for change from fast withdrawals.

Second, you could use two separate hot wallets, one for medium and one for fast withdrawals. You'd need to manage these carefully, perhaps by splitting your total available funds between them. Then, you can configure your system to draw from the appropriate wallet for either medium or fast transactions. It might not be the best idea though..

Good to hear, the last time I checked, that was not the case. I also thought they were in even more trouble with the insolvency they had.

As for the wallets, then upon checking ThorSwap it looks like they're supporting a good amount of them? It's probably less convenient for those who use the platform for BTC, and use something like Electrum, but for other assets, they seem to be supporting all of the popular wallets.

You can also read through this thread slowly in a way that you will understand. Read the posts of people that are given merit and alsoread the posts of high reputed members there

eXch is closing. What are the alternatives?

You will see many useful information in addition.

You can also check this site: https://kycnot.me/