Stealth Pay

Stealth Pay is live on mainnet. Private payments on-chain. No relayer. No trusted party. Just math. 🧵

Day 35 of #BuildOn0G 5 weeks in. privacy layer: live. SDK: published. docs: complete. playground: running real transactions. the protocol is the foundation. what gets built on top is the interesting part. open to builders who want to ship private payments on 0G.

Day 34 of #BuildOn0G 0G Storage is what makes the hint system work without a relay server. sender encrypts the note with the receiver's public key, uploads to 0G Storage. receiver's sync() scans, finds it, decrypts automatically. on-chain storage for encrypted data.

first private transaction with Stealth Pay: install SDK configure pool address and spending key call shield() estimated time to first real ZK transaction: under 30 minutes

Day 33 of #BuildOn0G private payroll walkthrough is live in the docs. shield the total once. distribute to each employee's spending pubkey. employees unshield on their own schedule. three SDK calls. HR data stays off-chain. no salary discovery on-chain.

you cannot generate a valid proof for a note you don't own not because the contract prevents it because the circuit prevents it the math won't produce a valid witness without the spending key that matches the commitment

how the tree sync works: SDK reads PrivacyPool events from last synced block each Shield event: one leaf inserted each Spend event: nullifier marked used local root matches on-chain root no API. no server. just events.

Day 32 of #BuildOn0G the playground now shows the full code diff — live call + complete integration code — updating as you type. pick an operation, fill a param, copy the snippet. the gap between "trying it" and "shipping it" is one file. trystealth.xyz

client-side proving means your user's browser is the proving server no cloud infra needed no cost per proof on our side no single point of failure for proof generation you own the entire execution stack

proof size for a spend: ~2KB that's the entire cryptographic argument that you own two notes, they're in the tree, the math balances, and the nullifiers are valid 2KB proves everything the chain needs to know

0G APAC 黑客松已圆满落幕，评审工作正在紧锣密鼓地进行中。 The 0G APAC Hackathon has successfully concluded, and the judging process is now in full swing. 在过去的两个月里，我们共同见证了： • 亚太地区 295 份技术项目提交 • 线上 8 周的 Builder Hour 与 Workshop AMA 交流 • 线下横跨亚太 5 大城市的 Builders Open AI Day Over the past two months, we have witnessed: • 295 technical project submissions from the APAC region • 8 weeks of online Builder Hours and Workshop AMA sessions • Offline Builders Open AI Days spanning across 5 major APAC cities 这一切始于一个核心发问：要构建真正可验证、兼顾隐私且原生上链的 AI Agent，还有哪些底层痛点尚待解决？ It all started with one core question: To build AI Agents that are truly verifiable, private, and native on-chain, what underlying pain points remain to be solved? 从智能体基础设施、可验证交易，到智能体经济、Web 4.0 与主权隐私 —— 亚太开发者用行动诠释了 0G 为何是“为 AI Agent 而生的区块链”。致敬亚太开发者的硬核交付，感谢大家一路同行。 From agent infrastructure and verifiable transactions, to agent economies, Web 4.0, and sovereign privacy — APAC developers have demonstrated through action why 0G is "the blockchain built for AI Agents." Salute to the hard-core delivery of our APAC developers, and thank you all for walking this journey with us.   项目： Projects: @Agentra69 @AIsphere0G @AlphaJournal_ @AetherCredit @TrustFolio_0G @LokiLabsAi @MDLOG_labs @coal_payments @MemoriaDA_ @SealedMind_0G @SunflowerLau27 @synapsemesh @blindmarkt @Ivaronix @VAMVault_ @herald_protocol @Ghast_AI @stealth_pay @Wraith__DA @NeoSoulAI @ayushsaklani976 @Lineage_0G @yieldgeko @zer0Gig @0gclawforge @Proof__Pay @0xgents @zerovulntech @0arena_labs @GhostProver   贡献者： Contributors: @zax_raider @emmanuel_haanks @czar_skah @alhadji_ACE @rajkaria_ @GroverInnovate @Vigothecreator @encrypt_wizard @czar_skah @bapeetttt @Armanibanks100 @exluminated @kurokurohitam Build For 0G APAC Hackathon! Build on 0G!

Day 31 of #BuildOn0G the repo is public. the circuits are readable. the verifier key is derivable. anyone can recompile the Noir circuits and confirm the deployed verifier matches. "don't trust, verify" is not a slogan here. it's an instruction. trystealth.xyz

Poseidon2 was designed specifically for ZK circuits SHA256 is expensive to prove inside a circuit Poseidon2 is not this is why the Merkle tree uses Poseidon2 and not the hash everyone knows

a ZK proof has two input categories: public inputs : the chain sees these private inputs : the chain never touches these your spending key, your amount, your salt: all private inputs the proof says: these private inputs satisfy the circuit. nothing else.

Day 30 of #BuildOn0G 30 days. shipped. ZK circuits in Noir. UltraHonk proofs verified on-chain. TypeScript SDK on npm. live playground on 0G Galileo. everything is open source. try it, audit it, build on it. trystealth.xyz

banks compete on privacy they don't share your balance with your competitors crypto is the first financial system where your competitor can check your position in real time, for free

inheritance is a private matter estate planning is a private matter on-chain, both are reconstructable from the moment of the first transaction permanent public records have permanent personal consequences

MEV is a privacy problem before it's an economics problem front-running exists because pending transactions are visible before they land private transactions remove the surface before any MEV solution is needed

Day 29 of #BuildOn0G privacy should not be a product feature. it should be a protocol guarantee. if you rely on a privacy policy, you are trusting a person. if you rely on a ZK proof, you are trusting math. math does not change its mind. trystealth.xyz

protocol treasury management, publicly visible: your runway is estimatable your vendor relationships are mapped your market moves are front-runnable none of that needed to be public

the gap between crypto people and everyone else on privacy: crypto people: "public wallets are fine, I have nothing to hide" everyone else: "I will not put my real finances somewhere that makes them public" one of these is wrong about adoption