cash out

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About

**Cash Out** is a decentralized invoice financing and liquidity unlocking platform built for freelancers and SMEs. It addresses the global issue of delayed B2B invoice payments—over **$3 trillion** locked and **50,000+ business failures** annually. The platform enables instant payments upon invoice confirmation using **zero-knowledge proofs (ZKPs)** powered by **vLayer**, with all transactions executed **securely and privately on the Rootstock testnet**. --- ## 🔍 Real-World Problem - 📉 **61%** of B2B invoices are paid late. - 🧾 SMEs lack legal and financial resources to enforce timely payments. - 🔒 On-chain financial transparency is avoided due to **privacy concerns**. - ❌ Cash flow gaps cause **50,000+ business failures each year in the US**. --- ## 🚀 The Cash Out Solution Cash Out provides a **private, verifiable**, and **trustless** mechanism for invoice financing. - ✅ Instant liquidity for suppliers via zk-proofs of invoice confirmation and buyer solvency. - 🔐 Privacy-preserving financial verification (e.g., Binance/Bybit proof, cross-chain averages). - ⛓️ Entire lifecycle is on-chain: transparent, tamper-proof, and automated. - 📊 Uses **Pyth** for reliable price feeds and **Rootstock Attestation Service (RAS)** for claim validation. ---

How it's made

### 🔨 Technologies Used | Component | Technology | |------------------------|------------------------------------------------| | Blockchain Base | Rootstock Testnet | | Privacy Layer | vLayer (ZK generation & verification) | | Proof Attestation | Rootstock Attestation Service (RAS) | | Oracle | Pyth Network (price conversion) | | Cross-Chain Proofs | Time Travel & Teleport (ZK multi-chain proofs) | | Asset History Proofs | Binance & Bybit portfolios (zk-verified) | | Token Payout | $RIF and $USDC | --- ## 🧠 Product Workflow  --- ### 👥 User Profiles - **Clients** and **Suppliers** register on-chain via a `CreateProfile` transaction. ### 🧾 Invoice Lifecycle 1. Business issues an invoice and sends a confirmation email. 2. Supplier parses the email and generates a **zk-proof** of the contents. ### 💰 Financial Solvency Verification - ZK-proofs of liquidity from: - Binance/Bybit exchange history - Cross-chain wallet balance (via Teleport + Time Travel ZK modules) ### ✅ Claim Verification - Supplier submits zk-proof to claim payment. - Creates an **attestation** on the Rootstock Attestation Service (RAS). ### 🪙 Payout - Funds released instantly in **$RIF** or **$USDC** to supplier’s wallet. --- ### 🤹 Hacky/Innovative Aspects - ✉️ **ZK Email Proofing**: Parses Gmail content and turns it into verifiable cryptographic claims. - 🌐 **Cross-chain ZK Liquidity Proofs**: Aggregates multi-chain balances without revealing wallet info. - 🧠 **Proof-of-liquidity without trust**: No credit scores, no raw data exposure—just pure cryptographic solvency. ---