opencred-contracts

Rust/Soroban smart contracts for the OpenCred decentralized credential registry on Stellar.

What is OpenCred?

OpenCred enables trustless, on-chain credential management:

• Issuance — authorized issuers register credential hashes on-chain
• Verification — anyone can verify a credential's authenticity and status
• Revocation — issuers can permanently revoke credentials

Credential documents are stored on IPFS. The blockchain stores only hashes, issuer/holder addresses, timestamps, and revocation status.

Repository Structure

contracts/
└── credential_registry/   # Core registry contract (scaffold)
    ├── src/lib.rs
    ├── Cargo.toml
    ├── README.md
    └── test/
Cargo.toml                 # Workspace root

Stack

• Soroban — Stellar smart contract platform
• Rust (edition 2021)
• Stellar SDK

Local Development

Prerequisites

rustup target add wasm32-unknown-unknown
cargo install --locked stellar-cli

Build

cargo build --target wasm32-unknown-unknown --release

Test

cargo test

Repository Philosophy

• One contract per directory under contracts/
• No business logic merged until it has passing tests
• All on-chain storage decisions documented in the contract's lib.rs
• IPFS integration is off-chain; contracts only store hashes