[ANN] CoinCync — RandomX privacy coin · 0 premine · 0 dev tax

CoinCync — Privacy by math. Privacy by law.
Public testnet live · Mainnet October 1, 2026 00:00:00 UTC

RandomX CPU mining · CLSAG ring sigs · Stealth addresses · Bulletproofs+ · Dandelion++
0% premine · 0% dev tax · 100M asymptotic supply cap · Compile-time enforced Constitution

TL;DR

A privacy-first cryptocurrency with mandatory shielding on every transaction, auditable supply, and a Constitution that's enforced by the compiler — not by promises. Built solo, MIT licensed, public testnet live as of today. CPU-mineable on any modern laptop.

What's different

Zero premine. Zero dev tax. Zero foundation. Every CYNC is mined by someone who contributed proof-of-work. No founder allocation. No treasury. No "team coins."
CYNC↔BTC atomic swaps at mainnet. Trustless cross-chain swaps via adaptor signatures over CLSAG. Constitutional mainnet-launch commitment, not roadmap. The listing-independence move.
CPU-only RandomX. Same algorithm as Monero. Mine on a laptop. No ASICs, no GPU advantage.
Hard 100M supply cap with single-formula asymptotic emission. reward = max(0.6, (100M − mined) / 2M). No halvings, no eras, no cliffs. Monero has no cap; we do.
Privacy is mandatory. No opt-in, no transparent mode. Every transaction uses CLSAG ring sigs + stealth addresses + Pedersen commitments + Bulletproofs+ + Dandelion++ — and 17 other features below.
Constitutional protections, compile-time enforced. Any change that violates the Articles fails the build with an UNCONSTITUTIONAL error. The full Constitution is in the repo.

Network specs

Algorithm: RandomX (CPU-only, ASIC-resistant)
Block time: 120 seconds
Supply cap: 100,000,000 CYNC (asymptotic, hard-enforced)
Genesis reward: ~50 CYNC/block
Tail floor: 0.6 CYNC/block (kicks in naturally when decay reaches it, not a separate phase)
Fee burn: 30% normal, 50% congested
Ring size: CLSAG ring-16; 11 during bootstrap (first 10,000 blocks of any network)
Min difficulty: 500 (consensus floor — prevents bootstrap runaway)
Testnet: LIVE NOW (5-node fleet across 3 continents)
Mainnet: October 1, 2026 00:00:00 UTC

How to mine (CPU, any modern laptop)

Linux:

Code:

wget https://github.com/ghostrider1092/Coincync-Testnet-/releases/download/v1.0.6-testnet/coincync-linux-x86_64.tar.gz
tar xzf coincync-linux-x86_64.tar.gz
./coincync-rig run-solo \
  --node https://api.coincync.network/rpc/testnet \
  --address YOUR_tCYNC_ADDRESS \
  --threads 0

Windows: Download coincync-windows-x64.tar.gz, extract, double-click create-wallet.bat (makes a wallet, saves your address), then double-click start-miner.bat.

Both tarballs SHA-256 verified. Reproducible builds documented in repo.

Testnet faucet

Hit the faucet at coincync.network/faucet — paste your tCYNC address, receive 10 tCYNC. Rate-limited 1 drip per hour per address.

Privacy stack — what every transaction gets

Privacy is enforced at four layers. All Layer 1-3 features are active on testnet today. Phase-2 modules (Orchard/Spark) are compile-time gated and not yet enabled in consensus — they activate via CIP after audit.

Layer 1 — Cryptographic (every transaction)

CLSAG ring signatures — sender hidden among 10 decoys (ring-16; 11 during first 10,000 blocks)
Stealth addresses — receiver hidden via ECDH one-time keys, no on-chain reuse
Pedersen commitments — amounts hidden, balance provable via homomorphic property
Bulletproofs+ — logarithmic range proofs (~672 bytes/output), no trusted setup
Encrypted memos — payment metadata sealed with ChaCha20 + ECDH, recipient-only
View tags — 1-byte fast-scan hint for recipients, zero privacy loss
Key images — single-use, unlinkable, prevents double-spending without revealing source

Layer 2 — Network

Dandelion++ propagation — stem-then-fluff routing hides sender IP from observers
Noise_XX P2P encryption — X25519 + ChaCha20-Poly1305 with forward secrecy
Traffic shaping + constant-rate padding — defeats timing-correlation analysis
Tor / SOCKS5 transport — optional, node operator opts in via flag

Layer 3 — Wallet

Subaddresses — unlinkable receive addresses derived from a single wallet
Uniform 2-in/2-out tx shape — every transaction is structurally identical, defeats tx-graph fingerprinting
Decoy defense — gamma-distributed ring selection mimics realistic spending patterns
Time-scoped view keys — view keys rotate every ~50,000 blocks for forward secrecy if shared with auditors
Plausible-deniability wallets — coercion resistance via multiple credible wallet states
Auto-churn — wallet shuffles UTXOs in background to break age-correlation
Dead man's switch — recovery path that keeps the original spending key out of the recovery transaction
FROST M-of-N multisig (CIP-008) — threshold Schnorr signatures (RFC 9591); on-chain output indistinguishable from single-sig

Layer 4 — Constitutional (compile-time enforced)

Mandatory privacy — Article III: no opt-in, no transparent mode, no exceptions
No surveillance hooks — Article IX: no Travel Rule attestation, no balance-lookup RPC, no address blacklists
No admin authority — Article XII: no pause/freeze/seize functions, no emergency keys
No external trust — Article XIII: no bridges that admit external state into consensus

Phase-2 (compile-time gated; activate post-audit via CIP-007)

Lelantus Spark accumulator — full sender+receiver+amount privacy without ring decoys
Orchard / Halo2 shielded pool — recursive zk-SNARKs, no trusted setup ceremony

Coming at mainnet

CYNC↔BTC atomic swap (CIP-001) — trustless cross-chain via adaptor signatures over CLSAG
Light-wallet SPV (lightsync) — server-blind compact-block sync; strictly stronger than BIP-157
Miner-signed rolling finality (CIP-009.D) — 2/3 of active miners attest, time-warp immune

Roadmap

Now (May 2026): Public testnet live. Mining open. Anyone can run a node, transact, build on top.
Jun–Sep 2026: Stress testing, third-party cryptographic audit, atomic swap completion, wallet GUI hardening.
October 1, 2026: Mainnet genesis. Open mining from block 1. CYNC↔BTC atomic swaps live.

Links

Website: coincync.network
Faucet: coincync.network/faucet (10 tCYNC per address, 1-hour rate limit)
Explorer: explorer.coincync.network
Source: github.com/ghostrider1092/Coincync-Testnet- (MIT licensed)
Discord: discord.gg/5tYNSCsqzy
Public RPC: https://api.coincync.network/rpc/testnet (POST JSON-RPC 2.0)

Why I built this

Solo dev who got tired of watching privacy coins promise privacy and deliver compliance. No VC, no premine, no foundation — the Constitution prohibits all three by design and by code. If the project succeeds, it's because the math works and users showed up. If it doesn't, nothing was extracted in the meantime.

"We built CoinCync on one principle: your money is yours. Not visible to surveillance. Not subject to seizure. Not dependent on permission. Enforced by proofs, not promises."
— The CoinCync Manifesto

Standing on shoulders

CoinCync wouldn't exist without the open-source cryptography work it builds on: Monero (CLSAG ring signatures, RandomX), Bulletproofs+, Noise Protocol, the Zcash Orchard/Halo2 team, and decades of cypherpunk research on Pedersen commitments and stealth addresses. None of those teams asked for or endorse this project — but it would be technically impossible without their work being open. The Constitutional commitment to staying open-source carries that gift forward.

Bug reports, technical questions, dev feedback — all welcome here, on Discord, or GitHub issues. Don't expect token-price talk; that's not what this thread is for.