Solidus Protocol

The original blockchain at the core of the Solidus Network — a layer-1 purpose-built as a trust anchor for decentralized identity, verifiable credentials, and identity-bound staking.

• Consensus: HotStuff-style Byzantine Fault Tolerant (pacemaker, quorum certificates), ~1–2 s single-block finality
• Cryptography: Ed25519 per-validator signatures, BLS12-381 aggregates, BBS+ on BLS12-381 for selective-disclosure credentials, BLAKE3-256 everywhere (state, tx, block)
• State machine: RocksDB with dedicated column families for accounts, dids, credentials, validators, receipts, blocks; sparse Merkle commitments
• DID method: did:solidus — see did-solidus-spec
• Public testnet: JSON-RPC at https://rpc.solidus.network, block explorer at https://explorer.solidus.network

What's in this repo

crates/
├── solidus-consensus   # HotStuff state machine, pacemaker, leader election (VRF)
├── solidus-crypto      # Ed25519, BLS12-381, BLAKE3, BBS+ (zkryptium 0.6, byte-compatible with @solidus-network/bbs)
├── solidus-node        # Validator binary — bootstraps state, p2p, RPC, consensus
├── solidus-p2p         # libp2p transport, gossipsub, peer discovery
├── solidus-rpc         # JSON-RPC server — solidus_didResolve, solidus_credentialResolve, getValidators, etc.
├── solidus-state       # Executor, store, state-root computation
└── solidus-txns        # Transaction payloads (DidCreate, DidUpdate, DidDeactivate, CredentialIssue, ...) + handlers

Status

Live on testnet with four validators, single-block finality, ~35 k blocks/15 s under load. Mainnet launch is gated on independent security audit.

Build

cargo build --release

Run a single-node devnet

target/release/solidus-node \
  --chain-id solidus-devnet-1 \
  --data-dir ./dev-data \
  --rpc-listen 127.0.0.1:9944

Then resolve a sample DID:

curl -s -X POST http://127.0.0.1:9944 \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "solidus_didResolve",
    "params": ["did:solidus:testnet:5dXc8vN3kzGm7p6L9HsQrR2hYfBaT1Wj"]
  }'

Shipped features

• W3C DID Method did:solidus — all seven DID Core gaps closed (key rotation, deactivated-DID resolution metadata, full verificationMethod/relationship surface on chain, parameterised network in identifier, controller reassignment, versionId in resolution metadata)
• W3C Verifiable Credentials Data Model 2.0 (validFrom / validUntil / @context v2)
• BBS+ selective disclosure end-to-end — a holder can reveal "over 18" without disclosing the underlying date of birth
• SD-JWT VC issuance and verification (EUDI Wallet-compatible reference libraries), including KB-JWT, status-list revocation, and nested-path disclosure
• HotStuff BFT with TC formation correctness fix (handles the case where the local node misses a peer's Vote), committee surface via getValidators

Reference clients

• @solidus-network/sdk — TypeScript SDK with DID, credential, BBS+ and SD-JWT VC primitives
• solidus-verify — production KYC service issuing BBS+ credentials
• solidus-identity — self-sovereign identity wallet, credential holder, OIDC bridge

License

Apache-2.0.