I believe that code lacks modularity and eventually came out as a spaghetti 

That is why focus on efficiency and modularity especially when working with AIs with limited memory.

But man.. 20k lines? are you building a spaceship?

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I've decided to open source this, maybe the community will learn something from it!

https://github.com/0xfdbu/evm-app

I have been busy lately working on other things so i couldn't update this.

Have fun  !

I think you are attempting to scam / resell from the original the developer https://codecanyon.net/user/mashdiv
https://codecanyon.net/item/bicrypto-crypto-trading-platform-watchlist-kyc-charting-library-wallets-binary-trading-news/35599184

Can you verify that you are mashdiv?

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Thanks for the feedback, i really appreciate it.

1) Note that my exchange is also no KYC, meaning the platform would not force it but buyers/sellers can make it mandatory whenever it is needed meaning it can be avoided.

2) Yes you are right about accumulation of dust wallets, that's not an issue for me i believe. i gather them as "inputs" (significantly cheaper than outputs) since they are controlled by the same private key and route them to the exchange's fee collection address.

3) My idea of no pooling and simply facilitating escrow would put the buyer/seller accountable in case of money of laundering scenario, meaning no stolen/tainted funds would route my pool (i could figure out a way to filter them automatically and not collect those).

4) Pooling + No KYC is absolute suicide in my opinion, if you are holding someone else funds in that pool and law enforcements comes and says that there are stolen funds in that pool that you need to refund. In this scenario you have two choices, take the loss out of your pocket or another innocent user loses their funds (You won't have 1:1 backing of user funds anymore).

5) Yes i do have full custody of funds, that could be me at legal risks even if i don't route them or collect fees at some point but significantly less risks and accountability.

In the end my goal is not to end up like exch.cx and give users the freedom of exchanging without KYC so they take the risks themselves as they are going to withdraw that exact money they exchanged.

Yes, you're right — I’ve been overcomplicating it by trying to preserve UTXO provenance across trades. That would create unnecessary friction after the trade is settled.

I’m now leaning toward a Bisq-style architecture, where users hold their own keys and trades occur through escrow-based multisig. To scale that inside a fast, low-fee system, I’m thinking of using a Bitcoin-based ZK rollup-style L2, where:

Users retain control of private keys

Trades are coordinated off-chain through a state ledger

Disputes are settled via multi-sig or staked arbitrators

The full state is anchored to Bitcoin periodically

This keeps everything auditable, custody-transparent, and removes the need for pooling or origin-tracing of funds between users.

Good question — and this is intentional.

I don't want to act as a centralized intermediary or mixer. I only collect the ~1% fee; users trade directly. Routing funds through my pool would make me responsible for what flows through it, which I want to avoid.

The direct flow (A → 1-time address → B) keeps traceability intact. If coins are tainted, the recipient sees that and can decide. I’m not here to "clean" funds — just to provide the framework.

Yes, this might lead to flags, but that’s part of enforcing transparency and responsibility.

I’m also exploring a transparent L2 system (privacy-respecting) so users can audit internal flows themselves.

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

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Just sent you 0.01 ETH on sepolia testnet 

Just built a minimal forum where all posts are stored fully onchain on Optimism. 

No backend, no database – everything lives on the OP chain via smart contracts. 

It’s live here: https://evm-app.vercel.app/ 

Designed to be lightweight and censorship-resistant. 

Wallet login, post creation, and retrieval are all done onchain. 

Looking for feedback or ideas – give it a try!

Note: Please do not use your main wallet.

Grab some free testnet tokens here:

https://docs.optimism.io/app-developers/tools/build/faucets  (Recommended)
https://www.alchemy.com/faucets/optimism-sepolia

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7/1/2025 open for investigations

Hello all,

I'm offering a specialized crypto forensics service to help you investigate suspicious wallet activity, stolen funds, rug pulls, or scams across major blockchains (Ethereum, Bitcoin, BSC, Solana ..).

What I Offer:
Tracing stolen/lost crypto using on-chain analysis
Identifying suspicious wallet activity and movement
Fund flow visualizations and scam detection
Help with reporting to exchanges or platforms
Tech I Use:

I use open-source tools, custom scripts, and years of blockchain analysis experience to uncover wallet linkages and movement patterns.

Privacy Guaranteed – all inquiries handled confidentially.
 
Send me a forum with:
Wallet address(es)
Description of the situation
Any supporting links or TX hashes
Let’s get your crypto back—or at least find where it went.

Pricing -

$50 flat fee — covers investigation and full summary report
+5% success fee — only if funds are successfully traced and frozen/recovered

Bumping it, is still safe now that Lazarus from bybit hack are laundering money through exch.cx?

Please respond, keep this thread updating regarding this matter as many people including me are still using exch.cx

Are we going to expect more bans from Cex's ?

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