@WritzProtocol

BTCFi on Stellar

 Costa Rica / Colombia
writz.xyz
Joined July 2026
  • Tweets27
  • Following16
  • Followers38
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Bitcoin SPV inside a Soroban contract, in one picture. The contract does not call a Bitcoin node. The caller brings 6 headers, a Merkle proof, and the raw transaction. The contract checks the math.
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Do you know what Writz is? Come say hi to us during HackMeridian and Meridian. We love connecting with the community!
BAF@TheBAFNetwork7h
Replying to @TheBAFNetwork @StellarOrg @withsenda_ @Fondeal0
What if you could borrow USDC without selling your Bitcoin? Writz is a BTC-backed lending protocol on blockchain with no bridging, wrapping or custodians, so your BTC stays on Bitcoin. Meet the team at HackMeridian 🇵🇹 @WritzProtocol
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Presidente @nayibbukele, le escribimos con una propuesta concreta. Somos Writz Protocol, una startup de cuatro latinoamericanos, de Costa Rica y Colombia, que construye infraestructura financiera para Bitcoin sobre Stellar. El dato que nos trae aquí: El Salvador mantiene una reserva de más de 7,800 BTC, cerca de US$650 millones a precio de hoy. Y el país está invirtiendo en grande: al 14 de agosto, Dos Escuelas por Día sumaba 900 centros escolares intervenidos y US$858 millones invertidos. Writz permite usar bitcoin como garantía sin venderlo: - El BTC nunca sale de la red Bitcoin. Queda bloqueado en un script que nadie puede mover por su cuenta. Sin custodio, sin puentes, sin tokens envueltos. - Un contrato en Stellar verifica ese bloqueo contra la propia cadena de Bitcoin y entrega dólares digitales (USDC). - Al pagar, el BTC se libera. Si el protocolo dejara de existir, el dueño recupera su BTC por sí solo al vencer el plazo. Un ejemplo con números: 100 BTC, con una garantía conservadora del 200%, respaldan unos US$4.2 millones en USDC. Eso equivale a cuatro escuelas al costo promedio del programa. Por eso queremos ofrecerle firmar una carta de intención no vinculante (LOI) para diseñar un piloto: liquidez en stablecoins para seguir invirtiendo en escuelas, agua y electricidad, sin que el país venda su bitcoin. Hoy estamos en testnet, con lanzamiento en mainnet previsto para 2027 tras una auditoría externa. Ayúdanos a que esta propuesta llegue a la mesa: 1. Dale repost. 2. Comenta mencionando a @nayibbukele y @PresidenciaSV . #ElSalvador #Bitcoin
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Post-Quantum Signature Verification 🚀🔥
Build on Stellar 🔜 Meridian2026 🇵🇹
@BuildOnStellarOct 20

Introducing Bell, Protocol 30 on Stellar

Article · @BuildOnStellar
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Privacy on Writz, without the slide version. We have ZK work on testnet. We will not say your position is hidden on mainnet until that is the product you can click.
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Two contracts, on purpose. One is a non-ZK lending path. One is a commitment-tree path with Groth16. They were built to be separable. Launch order is a product decision. It is not a post. Architecture: docs.writz.xyz

Technical Architecture Overview - Writz Protocol

docs.writz.xyz
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What we are actually building. The core is BTC-collateral lending on Stellar: SPV in, USDC out. In parallel, Instaward 1 is a scoped USDC Earn sprint. That sprint is not a rebrand of Writz.
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Most lending protocols publish your collateral, your debt, and how close you are to liquidation. Should a DeFi position be a public billboard?
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Wrapped BTC is an IOU. A good IOU is still an IOU. An issuer holds BTC and mints a token on another chain. Writz is a script on Bitcoin and a verifier on Soroban. The collateral never becomes a token named BTC.
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Babylon, Templar, and others are in this design space too. We are not claiming the only honest design. We are claiming this one: script on Bitcoin, verifier on Soroban, USDC on Stellar.
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How the BTC gets locked. A P2WSH output on Bitcoin. Two paths out. Only two. Path A: you and the protocol sign. Path B: the timelock expires, you sign alone.
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Phase 1 still has a protocol key. That is a real limitation. The direction is less protocol key, not more. We write about that when there is code, not a promise.
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The relayer is public on testnet: api.testnet.writz.xyz Give it a txid. It returns the headers and the proof shaped for the call. Docs: docs.writz.xyz
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Your Bitcoin never leaves Bitcoin. Your loan, nobody sees. Real BTC collateral, verified on-chain via SPV. Zero custodians. ZK-private positions. Your keys. Your coins. Your loans.
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Writz Protocol 🔜 Meridian 2026 🇵🇹 retweeted
Miguel Nieto 🔜 Meridian 2026 🇵🇹@miguelnietoa_Sep 21
Proof of win 🥇 Had the privilege of pitching @WritzProtocol in Bogotá at Pulso Hackathon Colombia 🇨🇴 and we won 1st place! This unlocked: ✈️ A trip to São Paulo for the Stellar Builder Summit 💰 Funding through Instawards program to keep building Proud of this team ⚡️
Writz Protocol 🔜 Meridian 2026 🇵🇹@WritzProtocolSep 20
Writz Protocol lets you lock real BTC from a Bitcoin wallet and borrow USDC on Stellar. No bridge. No custodian. No wrapped token. A short thread on what that means, what we have already shipped, and where to read the code.
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Writz Protocol lets you lock real BTC from a Bitcoin wallet and borrow USDC on Stellar. No bridge. No custodian. No wrapped token. A short thread on what that means, what we have already shipped, and where to read the code.
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more replies
What you can open today: Site and testnet app: writz.xyz Docs: docs.writz.xyz Code (Apache-2.0): github.com/WritzProtocol/wri… Testnet. Not mainnet. We will say mainnet when mainnet is true.

Writz - Lock Bitcoin. Borrow dollars. Tell no one.

Lock real BTC. Borrow USDC on Stellar. No bridge, no custodian, no wrapped token. Live on testnet.

writz.xyz
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We will post here the way we build: in public, technically, without a launch every week. If you hold BTC and have never used it as collateral without handing it to someone, this is for you. Questions in the replies. We read them.
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