BLACKBAR
IFile Nº 402 · private balances on Solana

Every trade you make is on the public record.

On Solana, every swap, every transfer and every fresh wallet you fund is public. Wallet trackers and copy-trade bots read it as it lands. Blackbar gives you a private balance in SOL, USDC and USDT, so the trail stops with you.

Open the app → or keep scrolling
Public ledger · replay Plain wallet
    Trader 7Gp4…k2Qd · an illustrative session0 records
    IIWhat a tracker builds from the same feed

    The dossier

    A fresh wallet doesn't hide you if you funded it: the funding is the link. A tracker only needs public RPC data. Switch where the fresh wallets get their SOL and watch the file fall apart.

    Tracker's file

    Subject 7Gp4…k2Qd

    Wallets linked
    1
    Tokens bought
    0
    Entry pattern
    —
    Size
    —

    Linked
    IIIOne private payment, step by step

    How it's withheld

    1. 1

      A note joins the tree

      Your shielded balance sits in the pool as notes. Each one is a Poseidon commitment to amount, owner and randomness, stored as one leaf of a Merkle tree.

    2. 2

      A proof, not a signature

      To spend, your browser proves you own some leaf and that money in equals money out. Groth16, about two seconds, and your keys never leave the page. The chain verifies it in about 171,000 compute units.

    3. 3

      Spent, once

      Spending publishes a nullifier, so the note can never be spent again. Nothing ties the nullifier back to the leaf or the deposit that funded it.

    4. 4

      Sealed to the recipient

      The recipient's new note travels as 88 encrypted bytes (X25519, ChaCha20-Poly1305). Only their viewing key opens it.

    Step 1 of 4leaf 14 of 1,048,576
    IVSame payment, four points of view

    Lenses

    Who's looking
    Sent from

    Payment file · 14:02:51Viewed by tracker
    VWhat actually lands on-chain

    A swap with no owner

    A private swap leaves your balance through a one-time wallet, trades on Jupiter, and comes back into your balance in the other token. The chain sees three transactions and a wallet that belongs to no one.

    YouBlackbar
    Private swaps0
    Linked to you0
    On-chain txs0
    // what the chain shows for one swap tx 1 pool → 4KdT…9Qmw 1.005 SOL tx 2 4KdT…9Qmw → Jupiter SOL → USDC tx 3 4KdT…9Qmw → pool 108.2 USDC // whose wallet is 4KdT…9Qmw? withheld

    Amounts and timing are still public, so the app's privacy meter warns you when a swap would stand out.

    VIWhat it costs, what it takes

    On the bench

    Wallets a tracker could tie to youour end-to-end tests: burners, swap wallets and private sends, by direct on-chain links. Timing and amounts are the privacy meter's job
    None
    Proof time, in your browserGroth16, witness included. Your keys never leave the page
    ≈ 2 s
    Cost per private transaction227,720 lamports: the base fee plus permanent rent for two spent-note records, paid by the relayer and covered by its fee
    ≈ 0.0002 SOL
    Compute per private transferGroth16 verify, Merkle insert, nullifier check. The nearest Solana alternative reports about 544K for its verifier alone
    171K CU
    Seed phrases to back upone signature from your wallet recreates your balance, burners and swap wallets on any device
    0
    Tokensone private pool each; every deposit screened against sanctions lists and issuer freezes
    SOL · USDC · USDT

    Your balance.
    Off the record.

    Connect Phantom and sign once. Then shield SOL, USDC or USDT, send it, swap it, or fund a fresh wallet with gas included, and nothing on-chain points back to you.

    Open the appSee the pool, in public