x405 Explained: 1 NFT = 1,000,000 Tokens

Open a BigPump-launched token on the token board and you will see a field no other launchpad shows: it is simultaneously an ERC-20 and an ERC-1155 NFT. Most people's first reaction is that this is marketing. This post explains what it actually is, how it behaves, and where its real limits are.

The short version

Every token launched on BigPump is an x405 hybrid asset: an ERC-20 coin (6 decimals) and an ERC-1155 NFT bound together inside one contract at a fixed ratio of 1 NFT = 1,000,000 tokens.

The key property: holding the coin automatically means holding the matching NFTs — no separate mint, no second transaction, no second gas payment. Hold 3,500,000 tokens and you hold 3 NFTs (3,000,000 bound) plus 500,000 loose tokens.

How the binding works

Binding happens inside the contract's transfer logic. On every balance change the contract recomputes how many NFTs that address should hold:

So NFT count is a function of balance, not an independent asset. Buy, sell or transfer and the NFTs follow — you never take an extra action.

One important exception: pools and protocol contracts are excluded

The Uniswap pair address, the router, the dead address (0x…dEaD) and the PoolState / TaxHandler protocol contracts are excluded from NFT rebinding.

Why that is necessary: a liquidity pool usually holds a large chunk of supply. If the pool participated in binding, most NFTs would belong to a contract that will never claim anything — and real holders would get less. The same exclusion applies to dividends: the pair, router, burn address, PoolState and TaxHandler are all excluded from dividend distribution, so genuine holders receive a larger proportional share.

This exclusion (pair/router excluded from NFT rebinding) is one of the items fixed after the internal security audit and is deployed on mainnet, alongside a reentrancy guard on tax clearing, carry-forward dividend accounting and fault-tolerant payouts.

What it is actually for

1. Holding gets a visible artifact

The problem with memecoins is that holding one feels like nothing — your position is a number. With the NFT bound, your position shows up as an object in any wallet, marketplace or display tool that speaks ERC-1155. And the clean integer relationship (1,000,000 tokens = 1 NFT) gives people a natural unit: "I have three."

2. One contract, one pool of liquidity

The traditional approach is to ship a coin and a separate NFT collection: two contracts, two liquidity bases, two communities. x405 puts them in a single contract with one liquidity pool and one price. There is no NFT floor price to defend — token price × 1,000,000 is the implied NFT price.

3. It plugs into the Tax NFT dividend model

The full model is hold-to-earn. A creator can enable tax at launch (1%, 3%, 5% or 10%), split four ways across treasury / burn / dividends / liquidity using sliders that must total 100%. The dividend leg pays out in ETH, pro-rata to holders above the token's minimum holding threshold. No staking, no lockup: accrual starts when you are above the threshold and stops when you fall below it, and unclaimed dividends carry forward safely.

The timing limit has to be stated plainly: creator tax and holder dividends apply only after graduation, on Uniswap trades. While the token is on the bonding curve the creator tax is zero and there are no dividends — only the 1% pool fee (95% platform, 5% creator). We covered this in what creators actually earn before graduation; do not believe anyone selling "launch a coin and collect dividends passively".

Limits and caveats (the honest half)

• Not every wallet renders it well. The ERC-1155 side needs wallet support; some wallets only show the ERC-20 balance. The asset is on-chain either way — the display layer just lags.
• The NFT has no independent scarcity. Its count is fully determined by supply and distribution; it is not a limited-edition collectible. If you want 1,000 limited PFPs, this is not that.
• It does not change price risk. Hybrid assets solve the holding-proof and dividend-allocation problems, not "will this memecoin go to zero". Look at today's board: $STOCKTARD fell 85.77% in six hours — no mechanism saves a token nobody wants.
• Tax stacks. After graduation the platform adds 1% on top of the creator's rate, so a 5%-tax token costs 6% per side on Uniswap. Check the rate on the trade page before you buy.

How it compares to what else is on the chain

Today's board is a useful control group. $LPAD has 8 pools including 20% and 70% fee versions; $STOCKTARD grew 20 pools in six hours including one at 35.001%; $KERMIT had an 81% fee pool built within two minutes of its main pool. I wrote up how to read that fee fingerprint today.

What those tokens share is that all of their economics live outside the token, so anyone can build a tollbooth around them. The x405 tax logic sits in the token contract's transfer function and cannot be bypassed by another frontend, router or aggregator. That does not stop anyone from creating high-fee pools — the chain is open and nothing can prevent that — but the token's own tax and dividends never stop working because someone switched pools.

Launching one

1. Open BigPump launch page, connect a wallet (MetaMask, Rabby, OKX Wallet or any WalletConnect wallet), switch to Robinhood Chain (chain ID 4663), and sign a free login message — no gas, no approval.
2. Fill in name, ticker, image (upload or AI-generated), description and socials.
3. Decide on tax. If enabled, pick the total rate (1/3/5/10%) and set the four sliders for treasury / burn / dividends / liquidity to total 100%.
4. Optional: pay 0.001 ETH to have the platform mine a contract address ending in bbb (CREATE2 vanity, suffix verified on-chain by the factory).
5. Publish. No code, no seed liquidity of your own. The token starts trading on a bonding curve (a 1.5 ETH virtual reserve only sets the starting price — it is not money anyone deposits).
6. Once about 4 ETH of real ETH accumulates, it graduates automatically: the contract creates a Uniswap V2 pair, adds the pool's ETH and matching tokens, and mints the LP tokens straight to the dead address — liquidity locked permanently. Graduation takes a one-time 5% of the pool's ETH (95% platform, 5% creator).

The site never asks for a seed phrase or private key. Full parameters and contract addresses are in the docs.

FAQ

Is x405 the same as ERC-404?

Same family of ideas (fungible token and NFT bound in one contract), different implementation. BigPump's version is ERC-20 (6 decimals) plus ERC-1155 at a fixed 1 : 1,000,000 ratio, with the pair, router, dead address and protocol contracts excluded.

What happens to my NFTs when I sell part of my position?

When the balance drops below a multiple of 1,000,000 the corresponding NFT unbinds automatically. Buy back and it rebinds. You do nothing.

Can I sell the NFT separately?

It is bound to your balance, so transferring an NFT is effectively transferring the matching 1,000,000 tokens. There is no secondary market independent of the coin.

When do dividends start?

After graduation, once the token trades on Uniswap and accumulated tax reaches the clearing threshold. Payouts are in ETH, distributed pro-rata to addresses above the minimum holding threshold.

What does launching cost?

No seed liquidity required; network gas on Robinhood Chain is a fraction of a cent; the optional bbb vanity address is 0.001 ETH. The real costs sit in trading: 1% pool fee on the curve, 5% graduation settlement, and 1% platform plus the creator tax on post-graduation DEX trades.

See also today's hot-token report.

BigPump is an independent project, not affiliated with, endorsed by or sponsored by Robinhood Markets, Inc. On-chain figures come from the 2026-09-12 00:09 UTC snapshot. Not financial advice — memecoins are extremely volatile and most go to zero.

Disclaimer: memecoins are extremely volatile and most go to zero. This article is not financial advice. Do your own research and only spend what you can afford to lose.