How bnbmakers works

§01What bnbmakers is#

bnbmakers is a launchpad on BNB Chain where every coin launches on Flap with its own market maker. You can also put a maker on a Flap coin launched elsewhere. A maker is one market maker on one coin: a treasury and 1 to 10 trading wallets that buy dips and sell rises by settings its owner can change at any time.

A maker is funded by the BNB its owner puts in and, for a coin launched here, by that coin’s tax: every buy and sell of the coin pays a tax, and the coin’s Split Vault sends 80% of what reaches it to the maker’s treasury. Your share of the tax and of realized profit is paid to your wallet. Market making can lose money: the wallets buy into falls, and a price can keep falling.

How BNB moves through a maker

1. Launch. Your wallet creates the coin on Flap with its buy and sell tax, makes your dev buy if you set one, and locks the tax split. Launching a coin
2. Funding. Your wallet sends the maker its starting BNB in a second transfer, right after the launch lands. On a coin launched elsewhere, you deposit it.
3. Tax. Trades on the coin pay its tax to the coin’s TaxProcessor. A dispatch sends it on: Flap keeps its protocol share, and the Split Vault pays 80% of the rest to the treasury and 20% to the platform in the same transaction.
4. Fund. The treasury spreads its BNB evenly over the trading wallets.
5. Trade. Each wallet buys dips and sells rises by your settings, on Flap’s bonding curve and, after graduation, on the coin’s PancakeSwap pair. How the market maker trades
6. Harvest. When a sell realizes a profit, your share of it moves back to the treasury.
7. Payout. The treasury pays what it owes you to your wallet, on its own once it passes your payout minimum, or when you ask.

§02Launching a coin#

You launch from your own wallet. One transaction creates the coin on Flap with you as its sender, makes your dev buy if you want one, and locks the tax split. A second, plain transfer funds the maker.

The launch page, step by step

1. Coin. Name (up to 32 bytes), ticker (up to 13 bytes, no spaces), image (PNG, JPEG, WebP or GIF, up to 1 MB), description (up to 500 characters) and optional website, X and Telegram links. The image and the coin’s details are pinned to IPFS through Flap. Flap keeps them for good.
2. Tax. A buy tax and a sell tax, each 0 or 1% to 10%, at least one side non-zero. They last for 100 years and nobody can change them. The page suggests 3.01% or 5.01%; see below.
3. Dev buy (optional). BNB your wallet spends on the coin inside the launch itself, up to 2 BNB. The tokens go to your wallet; the maker never holds or sells them. The dev buy pays Flap’s 1% fee and your own buy tax like any other buy.
4. Funding. BNB for the maker: at least 0.01 BNB and at most 100 BNB, or none (it then waits for tax). The treasury keeps its reserve (0.005 BNB by default) and 0.002 BNB for its own gas; the rest is capital, split evenly between the trading wallets, and a wallet buys only once it holds a min trade plus 0.002 BNB. With the default settings, trading starts when the treasury holds about 0.043 BNB.
5. Strategy. A preset or your own values. Every one can be changed later. Settings reference
6. Treasury. How much of the tax funds the maker, how much profit is reinvested, and how you are paid.
7. Review and sign. The page lists exactly what the transaction does and the most it can take from your wallet. Then your wallet asks you to sign.

What the launch transaction does

1. Creates the coin. It calls newTokenV6WithVault on Flap’s VaultPortal, which deploys a Flap tax token (Tax Token V3) with its bonding curve, its TaxProcessor and its metadata. The coin’s address is fixed in advance and ends in 7777, like every Flap tax token.
2. Creates the Split Vault. In the same call, Flap’s official Split Vault factory deploys a vault for the coin with two recipients: the maker’s treasury at 80% and the platform wallet at 20%. The vault becomes the coin’s tax recipient (its “market address”), with all of the tax after Flap’s share and its launch commission routed to it. The vault has no owner, no setters and no upgrade path: neither you nor bnbmakers can change the split.
3. Makes your dev buy, if you set one. The launch’s BNB value is exactly your dev buy; it buys from the curve at its opening price before anyone else can trade. The tokens land in your wallet.

Then, once the launch is final, the page asks your wallet for the second transaction: a plain BNB transfer from your wallet to the maker’s treasury. If you skip it, or close the page first, the maker starts once tax or a deposit reaches its treasury. You can deposit from the maker page at any time.

Tax rates, and Flap’s cut

Flap takes a protocol share of each tax before the rest reaches the vault. The share is chosen by the higher of your two rates: 10% of the tax when it is up to 3%, 5% from 3.01% to 5%, and 3% from 5.01% to 10%. Because the share steps down just past 3% and 5%, a 3.01% tax sends the maker more than a 3% tax would; that is why the page suggests 3.01% and 5.01%. Flap’s share is read per token on chain, and Flap can change its tiers for new tokens.

Flap also pays a launch commission out of the same bucket before the vault: 60,000 ÷ the higher rate in bps basis points of the tax (6% of the tax at 1%, about 2% at 3%, 0.6% at 10%), about 0.06% of the volume. Launches here set the platform wallet as its receiver, so the platform gets that commission plus its 20% of what reaches the vault.

What you sign

Two wallet prompts: the launch, then the funding. Any BNB Chain wallet in your browser works: MetaMask, Rabby, OKX Wallet, Binance Wallet, Trust Wallet and others. No maker wallet and no bnbmakers wallet signs your launch.

The API builds the launch, but this site checks it before your wallet sees it: it decodes the transaction and refuses to ask you to sign unless it goes to Flap’s VaultPortal, carries your name, ticker, tax rates and dev buy, makes the coin’s tax recipient a Split Vault from Flap’s official factory (the tax after Flap’s share and its commission, which goes to the platform wallet), and splits it 80/20 between this maker’s treasury and the platform. After it lands, the API checks the receipt on chain the same way: the coin exists at the predicted address, its market address is the vault, and the vault pays exactly those two recipients. Only then does the maker go live.

What it costs

After the launch

The API follows the transaction until it is final, usually within seconds, and the maker page goes live. Once the treasury holds BNB, the engine spreads it over the trading wallets. The first buy waits for the first dip: a wallet buys only after the price falls by its buy trigger from its high.

A dev buy of about 16.7 BNB or more would buy out the curve and graduate the coin in the launch itself; the 2 BNB limit keeps a launch well under that.

§03A maker on any coin#

You can put a maker on a Flap coin you did not launch here. It trades by the same rules and settings. Its tax does not reach it, so it runs on the BNB you deposit.

How to set one up

1. Paste the coin: its token address, or its flap.sh, DexScreener or BscScan link.
2. bnbmakers checks it. It must be a Flap coin that is still on its bonding curve or trading on its PancakeSwap pair. The page shows its name, ticker, image, tax and any makers already running on it.
3. Choose the settings: the same presets and settings as a launch.
4. Create the maker. It costs nothing. You sign in with your wallet, which signs a message and moves no funds, and the API makes the treasury and the trading wallets.
5. Deposit BNB to the treasury address shown on the maker page. With the default settings the wallets can start buying once the treasury holds about 0.043 BNB, on the next dips.

What is different

• One maker per wallet per coin. Two makers of one owner on one coin could trade against each other, so the API will not open a second one while you have one open.
• No tax income. The coin’s tax keeps going wherever its own Flap settings send it. Rewards to the maker does nothing on these makers.
• The coin’s tax still applies to your trades. Every buy and sell your wallets make pays the coin’s tax, to someone else. A high-tax coin is expensive to market-make.
• The coin’s creator has no say. They get nothing from your maker and cannot change, pause or withdraw from it.
• Other people can run their own makers on the same coin. Each has its own owner, wallets and settings. Running makers from several wallets you control on one coin is against the terms of use.
• Fund it within a day. A maker nothing has funded a day after it was opened is closed. Reopen it from its page when you are ready; your wallet approves it.

§04How the market maker trades#

Each trading wallet runs the same rules on its own book: what it bought, at what average price, and what it sold. It buys when the price falls far enough under its reference and sells when the price rises far enough over what it paid.

One pass

Every pass, 15 seconds apart by default, the engine reads the coin’s market once and asks each wallet one question: buy, sell or wait? Sells are checked before buys, a wallet makes at most one trade per pass, and it never has two transactions in flight. The settings in force are read fresh every pass, so a change you save applies from the next one.

Every trade goes through Flap’s Portal: on the bonding curve while the coin is on it, and on its PancakeSwap V2 pair after graduation. Before signing, the engine quotes the trade from the trading wallet’s own address, sets the minimum it accepts from that quote less the slippage setting, and simulates it.

The high and the reference

A wallet measures dips from a reference price. While it holds nothing, the reference is its high: the highest price since its last sell, or since it first had BNB to trade. While it holds tokens, the reference is the price of its last buy.

Buying the dip

A wallet buys when the price is at least the buy trigger under its reference. With a 10% buy trigger and a high of 100, it buys at 90 or lower. The buy spends the buy intensity share of the wallet’s free BNB: its BNB minus the 0.002 BNB it keeps for gas and anything it holds for you. That amount is kept between the min and max trade size and inside every limit below. If what is left is under the min trade size, the wallet does not buy, and its status line says which limit stopped it.

Taking profit

A wallet sells when the price is at least the sell trigger over its average entry: the average it paid per token, fee and tax included. Before it sells, the engine quotes the sale after Flap’s fee, the coin’s sell tax (or PancakeSwap’s fee and the tax after graduation) and gas, and compares that with what those tokens cost. If the expected profit is under the profit target, the wallet keeps waiting. It sells the sell intensity share of its position, at least one min trade’s worth and at most one max trade’s worth, and never leaves a remainder worth less than the min trade size.

Stop-loss

With a stop-loss set, a wallet sells its whole position once the price is that far under its average entry. It skips the cooldown and ignores the profit target, but waits until 60 seconds have passed since another wallet of the same maker bought. While a stop-loss is due, no wallet of the maker buys. A position bigger than the max trade size goes in pieces, one per pass. In a fast drop the price can fall far through the stop line between two passes; a sell that fails on chain is tried again a pass later. While a maker is paused, stop-losses do not fire.

Averaging down, cooldown and the wash rule

With average down off, a wallet that holds tokens buys nothing more until it has sold. With it on, it buys again each time the price falls another full buy trigger under its last buy. Trading frequency is the least time between two buys of one wallet; sells never wait for it.

One more wait is built in and cannot be changed: a wallet never buys within 60 seconds or its cooldown, whichever is longer, of another wallet of the same maker selling, and never takes profit within that window of one buying. Stop-loss and liquidation sells wait only the 60 seconds.

Checks every buy passes

The ladder

With several wallets, each can trade its own levels. The ladder sets wallet n to n times the maker-wide triggers, capped at 90%. A shallow dip moves one wallet; a deep one brings in all of them, each at its own price. You can also set any wallet’s triggers by hand and give any wallet its own stop-loss, which applies even when the maker’s is off. The Adaptive preset uses a hand-set ladder: 5/12%, 10/18%, 15/25%, 22/35%, 30/50%.

What a wallet tells you

Every pass, each wallet writes one line on the maker page saying what it is waiting for or what it just did. For example:

• flat; buys below 0.0₇27 BNB, 10% under its high of 0.0₇3 BNB
• waiting: cooldown 1m 12s, then it buys: price 10.4% under its high of 0.0₇3 BNB
• no buy: daily spending limit reached (2 / 2 BNB)
• waiting: another wallet of this desk sold 40s ago, and wallets of one desk never trade against each other

A worked example

One trading wallet with Balanced’s triggers and sizes: buy and sell trigger 10%, buy and sell intensity 50%, average down on, a 3-minute cooldown, a 4% profit target and a 35% stop-loss. Its BNB/token ratio is set to 0% so the triggers show on their own. Min trade 0.01 BNB, max trade 0.5 BNB, 1.00 BNB free. The coin has a 3.01% tax each way and is on Flap’s curve, so every buy and sell pays 4.01% (1% Flap fee plus tax). Prices are written as market cap in BNB: the price of one token times the 1 billion tokens every Flap coin has. Gas and price impact are left out.

Losses are never charged to what you are owed; the maker’s capital takes them. Its free BNB went from 1.00 to 0.835. The same settings that took a profit on the way up lost more than that profit in the crash. Part of the tax the wallet paid came back to its own treasury through the split, which this example leaves out.

§05Settings reference#

Every setting can be changed at any time from the maker’s dashboard. Each save is a new version: the maker page shows what changed, from what to what and when, and the engine uses it from its next pass.

Presets compared

A preset sets 11 strategy values at once; changing any of them by hand turns the preset into Custom. Adaptive also sets five wallets and its ladder. Degen also sets the treasury to market-make with everything: every tax payout and profit stays in the maker, with no reserve, allocation, exposure cap or daily limit.

§06Money: tax, payouts, withdrawals#

A maker keeps two kinds of BNB apart: what it owes you, and the capital it trades with. Only two things credit what it owes you, and apart from trades its BNB leaves only for your wallet.

capital = treasury BNB − payable − reserve − gas reserve + trading wallets’ BNB + open positions at cost

At most every 10 minutes, the engine spreads capital evenly over the active wallets, up to the treasury allocation if you set one. It tops up wallets below their share from the treasury, and a wallet that holds no tokens and has more than its share sends the excess back.

Tax payouts

Tax builds up in the coin’s TaxProcessor. Anyone can call its dispatch(): Flap runs a bot that does, and the engine does too, once at least 0.005 BNB is waiting and at most once every 60 seconds per maker. A dispatch sends native BNB to Flap’s fee receiver and to the Split Vault, which pushes 80% to the treasury and 20% to the platform wallet in the same transaction. Nothing has to be claimed. The maker page marks each payout with ◆ on the chart’s time rail. After graduation, tax is taken in tokens and sold for BNB in batches by the token itself, so payouts come in steps.

What you are owed

Two things add to what the maker owes you. Nothing else does.

payable += treasury’s share of a payout × (100% − Rewards to the maker) — at 50%: of a 0.1 BNB dispatch, 0.08 BNB reaches the treasury and 0.04 BNB is credited to you.

payable += realized profit × (100% − Profit reinvested) — at 50%: a sell that realizes 0.2 BNB credits you 0.1 BNB.

Losses are never charged to what you are owed: a losing sell lowers the maker’s capital only. Your share of a profit stays in the wallet that made it until it adds up to a useful amount; then it moves to the treasury, a harvest, and is credited to you. Credits are applied once, from finalized transactions only.

Payouts and withdrawals

With auto payout on, the treasury sends what it owes you whenever it reaches your payout minimum (0.02 BNB by default). With it off, the amount builds up until you use Withdraw profits. Withdraw capital sends BNB that is not in open positions to your wallet; it leaves the reserves in place. Until it is done, the maker makes no new buys.

The engine carries out requests on its next passes, and you can cancel one it has not finished. A request whose transaction fails on chain 3 times is given up, with a note on the dashboard.

Where BNB can go

Apart from trades through Flap’s Portal, BNB leaves a maker only for: your owner wallet (payouts, withdrawals, closing); the maker’s own wallets (funding, harvests, returns); and the platform wallet for a profit fee, when one is set (none by default).

§07Fees#

Fees apply on both sides of a trade. On the curve with a 3.01% tax, a buy and a sell cost about 7.9% together, so a 10% rise from an entry that already includes the buy’s cost leaves about 5.6% after the sell, and a 4% rise loses a little. On PancakeSwap with the same tax a side costs about 3.3%. The profit target stops a wallet from selling into a rise that fees and tax would eat.

§08Transparency#

Anyone can check what a maker does. Its wallets are listed by address, and everything they do is on chain. Every maker has a public page that shows:

• the treasury and every trading wallet, each linked to BscScan, with its BNB, its holding, its average entry and the lines it trades on;
• every trade with the reason it was made: the dip, the rise, the stop-loss, a trailing exit or a liquidation;
• every tax payout, transfer and payout;
• every settings change: when, by which wallet, and each value from what to what;
• the engine’s latest note for the maker and for each wallet, and the orders it would place next.

The chart marks the maker’s own buys (▲) under the price line, its sells (▼) over it and its tax payouts (◆) on the time rail. Totals count finalized transactions only.

No wash trading

Wash trading means trading with yourself to fake activity. A maker’s wallets all belong to one owner, so bnbmakers never lets them trade with each other: a wallet does not buy within 60 seconds of another wallet of the same maker selling, and does not sell within 60 seconds of one buying. The rule is in the engine; owners cannot turn it off. A maker has no volume target: it trades only when the price crosses its lines.

Why several wallets

Several wallets let one maker hold positions at different prices, each with its own book and lines. Splitting capital also keeps each trade smaller, which moves the price less. On chain each trading wallet is an ordinary address, and a tool that does not know bnbmakers counts them as separate holders; the maker page lists all of them.

§09Trust model and security#

bnbmakers is custodial for a maker’s funds. You keep your own wallet; the bnbmakers server holds the keys of each treasury and trading wallet and signs their transactions. This section says what protects those keys, what the chain enforces on its own, and what you are trusting bnbmakers and Flap with.

Every maker key is encrypted with AES-256-GCM under a 32-byte master key and bound to the record it belongs to, so a sealed key copied to another maker does not open. A key is decrypted in memory only to sign one checked transaction. The app has no way to export a maker’s keys.

Checks before any key signs

Every server-signed transaction is built, simulated from the signing wallet, checked against an allow-list, and only then signed and sent:

• a Flap Portal swap between this maker’s coin and BNB, with the exact BNB value and a real minimum output from the wallet’s own quote;
• an approval of the coin for the Portal;
• a dispatch() on this coin’s own TaxProcessor;
• a plain BNB transfer to the owner, the maker’s own wallets, or the platform wallet for a profit fee.

Anything else is refused. The check limits what the bnbmakers code and its libraries can get a key to sign. It cannot stop someone who has taken over the server and its master key.

Flap’s powers

Flap runs the contracts every coin here depends on. Its Portal and VaultPortal are upgradeable proxies, and Flap’s admin roles can re-point a token’s market address (where the tax goes) with changeMarketWallet. That trust assumption is the same for every Flap token. If Flap used those powers, tax could stop reaching the vault, trades could stop, or fees could change, until the engine is updated. The engine checks the Portal’s version at start, and the API re-checks a coin’s market address and vault recipients when the maker is verified.

Safeguards

• The server refuses to start if its RPC’s chain id differs from the configured chain, and does not send on mainnet unless mainnet is switched on explicitly.
• A new deployment starts in dry run: it builds and simulates every transaction and signs none. The site header shows Dry run, Testnet or Engine off whenever the engine is not trading live.
• One transaction in flight per wallet. A transaction that fails on chain makes its wallet wait 5 minutes before trying again.
• Every transaction sets an explicit gas limit under BNB Chain’s per-transaction cap.

If a server holding the keys to a maker’s wallets is not acceptable to you, do not use bnbmakers.

§10Points#

Season 1 counts points from what happened on chain: 1,000 points for each coin you launch here once its treasury has received 0.05 BNB of tax; 50 points for every BNB your makers trade; and 500 points for every BNB of tax your coins send their treasuries. The platform’s own makers earn none. Points have no cash value and are not a promise of tokens or any other reward; the rules may change. See the board

bnbmakers has no platform token. Nothing on this site is an offer of one.

§11FAQ#

§12Glossary#