[ANN] FYCHAIN — BLAKE3 Proof-of-Work Layer 1

[fychain]

BLAKE3 PoW (Alephium ASIC compatible) · Full EVM · ML-DSA post-quantum signatures · 7-second blocks · Fair launch, no ICO

MAINNET IS LIVE

What is Fychain?

Fychain is a from-scratch Layer 1 built on one premise: a blockchain launched today should still be secure the day a large quantum computer exists.

Every chain you hold coins on right now — Bitcoin, Ethereum, and virtually everything else — protects your funds with ECDSA, a signature scheme that Shor's algorithm breaks outright. When that day comes, migrating billions in value across chains that were never designed for it will be chaos. Fychain skips the migration: it is post-quantum from genesis.

At the same time, we refused the usual trade-offs. Fychain is not an academic curiosity — it is a chain you can mine with hardware that already exists, use with the wallet you already have, and build on with the tools you already know.

Key features

• Post-quantum signatures — native transactions are signed with ML-DSA-65 (NIST FIPS 204), implemented from scratch and cross-validated byte-for-byte against independent implementations. Node-to-node traffic uses a hybrid Noise XX + ML-KEM-768 (FIPS 203) handshake, so even recorded traffic can't be decrypted retroactively.
• BLAKE3 proof of work, ASIC-ready — double-BLAKE3 with the exact 168-byte header / 24-byte rolled-nonce layout Alephium mining hardware already speaks. Antminer AL1, Goldshell AL series, IceRiver AL series: point them at the pool and go.
• Full EVM, MetaMask out of the box — Solidity contracts, Hardhat, Foundry, ethers.js, standard JSON-RPC. ECDSA transactions are consensus-native during the hybrid era (with a protocol-level sunset switch for the day PQ-only becomes the right call).
• 7-second blocks — LWMA-3 difficulty retargets every single block and absorbs 10x hashrate swings within one window.
• Fair, Bitcoin-style economics — no ICO, no VC allocations, no hidden unlocks. See tokenomics below.
• Open source, audited foundation — the entire node, pool, wallet, and specs are public. Every design decision and every audit finding is recorded in the repo (docs/DECISIONS.md).

Tokenomics

Ticker	FYC (18 decimals)
Max supply	23,000,000 FYC
Premine	2,000,000 FYC (8.7%) — written into the genesis block for anyone to verify; funds development, infrastructure and the security bounty program
Mined supply	21,000,000 FYC over decades
Block reward	1 FYC + fees
Halving	Every 10,500,000 blocks (~2.3 years)
Fee model	EIP-1559 — base fee is BURNED, miners keep priority tips. Under real usage the effective supply drifts below 23M
Coinbase maturity	512 blocks (~1 hour)

Launch difficulty is deliberately CPU-bootstrappable — the earlier you mine, the more of the emission you capture while difficulty ramps to real hashrate. There is no better time than the first weeks of a fair-launch PoW chain.

⛏ HOW TO MINE

Your payout address IS your pool account — no registration.

Step 1 — get an address. Easiest: add Fychain to MetaMask with one click at fychain.org (RPC https://rpc.fychain.org, chain ID 6679, symbol FYC) and use your normal 0x address. Or generate a fully post-quantum wallet with the CLI: fyc keygen.

Step 2 — point your miner at the pool:

Code:

URL:      stratum+tcp://pool.fychain.org:3333
Worker:   0xYOUR_FYC_ADDRESS
Password: x

ASICs (Alephium-family BLAKE3): Bitmain Antminer AL1, Goldshell AL Max / AL3 / AL-BOX series, IceRiver AL0–AL3 — enter the three lines above in the miner's web dashboard. Same job format the hardware already runs.

GPU / CPU: SRBMiner-Multi, BzMiner, or lolMiner with the blake3/Alephium algorithm:

Code:

SRBMiner-MULTI --algorithm blake3_alephium --pool pool.fychain.org:3333 --wallet 0xYOUR_ADDRESS --password x

Solo mining is built straight into the node:

Code:

fycd --network mainnet --mine --miner-address 0xYOURADDRESS --threads 8

Pool details: PPLNS, 0% fee at launch, vardiff, automatic on-chain payouts above 1 FYC, live stats + per-worker lookup + profitability calculator at pool.fychain.org. Stats API is MiningPoolStats-compatible.

Run a node / build on Fychain

Code:

git clone https://github.com/fychain/fychain
cd fychain && cargo build --release
fycd --network mainnet --genesis genesis/genesis-mainnet.json --rpc

The README has complete guides: node setup (mainnet + testnet), wallet CLI, running your own pool, deploying Solidity with Hardhat/Foundry, and the post-quantum Rust/TypeScript SDKs. Thirteen normative spec documents define every consensus rule — a second implementation can be built from the specs alone.

Deploying contracts is exactly like Ethereum:

Code:

networks: { fychain: { url: "https://rpc.fychain.org", chainId: 6679 } }

Want to test first? faucet.fychain.org drips free testnet FYC (10 tFYC/day).

🔗 LINKS

• Website: https://fychain.org
• Explorer (with rich list): https://explorer.fychain.org
• Mining pool: https://pool.fychain.org
• Testnet faucet: https://faucet.fychain.org
• Public RPC: https://rpc.fychain.org · https://rpc2.fychain.org
• GitHub (full source + specs): https://github.com/fychain
• Discord: https://discord.gg/mW2QZ74Rt
• Security contact: security@fychain.org (90-day coordinated disclosure, bounties paid from the premine budget)

Who is behind this?

Fychain was designed and built by Nonce — an anonymous developer, in the tradition this forum knows better than any other. No foundation, no company, no face. The chain is meant to outlive its creator: open source code, open specifications, proof of work. Judge the work, not the person.

FAQ

Q: Is this just another EVM fork?
No. The node is written from scratch in Rust — consensus, P2P, state trie, PoW, and the post-quantum cryptography (ML-DSA-65 and ML-KEM-768 implemented directly from the FIPS standards and cross-validated against independent implementations). Only the EVM execution core (revm) is shared with the wider ecosystem, deliberately, for tooling compatibility.

Q: If it's post-quantum, why accept ECDSA at all?
Adoption. MetaMask and every EVM wallet work today, while the native 0x50 transaction type is fully post-quantum. The protocol carries a sunset height so ECDSA can be retired by consensus when the ecosystem is ready — the migration path is designed in, not bolted on.

Q: Premine?
2M FYC (8.7%), fully disclosed in the genesis block anyone can verify, for development/infrastructure/bounties. No other allocations. 91.3% of supply is mined by you.

Q: My Alephium ASIC — does it really work?
The header layout, double-BLAKE3, big-endian target compare, and the 144-byte Stratum job blob match the Alephium hardware convention exactly (spec/02 and spec/09). Firmware that can retarget pools will mine Fychain. Come to the Discord #mining channel and we'll get you hashing.

Q: Exchanges? Price?
Fair launch — the chain went live with zero price and zero promises. Chainlist/wallet listings are in progress; everything else follows the community.

Mainnet is live. Difficulty is young. The quantum era is coming either way — mine the chain that's ready for it.

Join the Discord · fychain.org

[Seikar]

The blockchain explorer implies this was launched merely hours before my post made just now.  Didn't know that from your post.  Until checking, I was assuming weeks or months beforehand when it did not mention a launch date.

Not every reader is like me in checking further to correct their initial assumption.  (I once did a test in another context; only a single-digit % of readers clicked on a single prominent link).

Much looks like it may be positive.  However:

After having observed a bunch of recent coin launches, sadly a high-probability prediction appears:

a. Not more than a single-digit number of posters other than you and me will post in this thread in the next week or more.
b. If this gets an exchange listing with a market cap, the market cap may be $1k to $20k total nominally, but actual buy walls will be only hundreds of dollars.
c. Depleting a fraction of buy walls to get tens of dollars from a premine sale is basically nothing.

So why have a premine at all?  For tens of dollars gain?  The huge *cost* of a premine is that it makes the already-challenging situation of gaining popularity be even more difficult.

I know this comes across as insulting, but I am also genuinely curious what actually is the thought process of most developers.  What makes premines, even in these days frigid for new coins, be more typical than not?  Infrastructure cost only goes so far as an explanation if familiar with the cheapness of some rental servers.  (Do you even need a bare metal or dedicated server?  Else seems like tens of dollars a month or less).

You likely spent far, far more time / money / equivalence on creating this coin anyway.

Obviously I at least would guess no premine to be logical in context, even if that meant re-launching or burning the existing one.

If not, perhaps drop it to 1% or 2% for years later and still skip the trivial dollars of the near-term.  Everyone familiar with the (small) size of actual buy walls in almost any market knows 8.7% is more than enough to wipe them out.  Perhaps the near-10% premine standard developed from people unfamiliar with trading markets.

[fychain]

The blockchain explorer implies this was launched merely hours before my post made just now.  Didn't know that from your post.  Until checking, I was assuming weeks or months beforehand when it did not mention a launch date.

Not every reader is like me in checking further to correct their initial assumption.  (I once did a test in another context; only a single-digit % of readers clicked on a single prominent link).

Much looks like it may be positive.  However:

After having observed a bunch of recent coin launches, sadly a high-probability prediction appears:

a. Not more than a single-digit number of posters other than you and me will post in this thread in the next week or more.
b. If this gets an exchange listing with a market cap, the market cap may be $1k to $20k total nominally, but actual buy walls will be only hundreds of dollars.
c. Depleting a fraction of buy walls to get tens of dollars from a premine sale is basically nothing.

So why have a premine at all?  For tens of dollars gain?  The huge *cost* of a premine is that it makes the already-challenging situation of gaining popularity be even more difficult.

I know this comes across as insulting, but I am also genuinely curious what actually is the thought process of most developers.  What makes premines, even in these days frigid for new coins, be more typical than not?  Infrastructure cost only goes so far as an explanation if familiar with the cheapness of some rental servers.  (Do you even need a bare metal or dedicated server?  Else seems like tens of dollars a month or less).

You likely spent far, far more time / money / equivalence on creating this coin anyway.

Obviously I at least would guess no premine to be logical in context, even if that meant re-launching or burning the existing one.

If not, perhaps drop it to 1% or 2% for years later and still skip the trivial dollars of the near-term.  Everyone familiar with the (small) size of actual buy walls in almost any market knows 8.7% is more than enough to wipe them out.  Perhaps the near-10% premine standard developed from people unfamiliar with trading markets.

Thanks — this is a genuinely good critique, and I’d rather engage it than dodge it.
First, the fair hit: you’re right that my post didn’t give a launch date, and the chain is only hours old. I should have said so plainly. Point taken, and I’ll state it up front from now on. You’re also right that most readers won’t dig; that’s on me to be clearer, not on them to verify.
On the market realism — thin buy walls, tiny nominal caps, a handful of posters — I don’t disagree with any of it. I’m not operating under an illusion that this is going to have deep order books next week.
So to the real question: why a premine at all? I’ll answer with what I did rather than a defense of the abstract, because I think you’ve correctly identified that the dumpable premine is the actual problem, not the existence of a reserve.
The premine (~2.01M of ~23M, so ~8.7%) is now locked in a no-admin, no-owner, no-upgrade vesting contract. 1,750,000 of it releases at 100,000/month over ~17.5 months; it can only ever pay out to the original address; nobody — including me — can accelerate or divert it. That leaves ~250k (~1% of total supply) liquid for operational use, plus a 10k grant to the launch miner. It’s all on-chain and viewable at <fychain.org/lock>, and the contract source is public.
That directly defuses the scenario you’re describing. You’re completely right that 8.7% liquid would vaporize any real buy wall — but ~1% liquid, with the rest bleeding out at ~0.4%/month under a schedule I can’t change, is a different object. If my goal were the “tens of dollars now,” locking it for 17 months would be a strange way to pursue it.
Why keep any reserve then? Honestly: a slow, visible runway for bounties, liquidity, and paying people who aren’t me to work on it — the things that actually need funding past the point where my own time runs out. I agree that “infrastructure costs” is a weak justification on its own (you’re right, it’s a rental server, not a data center). The reserve isn’t for the servers; it’s for the years.
And I think your broader observation is correct: the ~10% premine norm mostly got cargo-culted by people who’d never watched a thin market get wiped by a single sell. A minority stake that’s locked and vesting in public seems like the honest middle ground between “premine you can dump” and “no ability to fund anything past launch.” If the community later thinks even the vesting slice is too much, that’s a conversation I’m open to having on-chain, in public.
Appreciate you pushing on it seriously rather than just tossing “premine = scam.” That’s rarer than it should be.
— Nonce

[Seikar]

A commendable answer, thank you.