LP-0060Finaldididentityw3cdecentralized-identityverifiable-credentials

LP-060: W3C DID Method Specification

Abstract

Defines the did:lux method for Lux Network. A DID document is stored on-chain as a compact binary record mapped by keccak256(did). The resolver is a read-only EVM precompile at 0x0060 that returns the DID document given a DID string. DID creation, update, and deactivation are transactions against the DIDRegistry contract on each EVM chain.

Specification

DID Syntax


did:lux:<chain-prefix>:<hex-address>

Examples: did:lux:c:0xabc...def, did:lux:zoo:0x123...789.

DID Document

Stored in DIDRegistry contract. Fields:

| Field | Type | Description |

|-------|------|-------------|

| controller | address | Account authorized to update the document |

| authKeys | bytes[] | Authentication public keys (Ed25519, secp256k1, ML-DSA) |

| serviceEndpoints | string[] | Service endpoint URIs |

| created | uint64 | Creation timestamp |

| updated | uint64 | Last update timestamp |

| deactivated | bool | Deactivation flag |

Operations

Create: registry.createDID(authKeys, serviceEndpoints) -- sender becomes controller.
Update: registry.updateDID(did, authKeys, serviceEndpoints) -- controller only.
Deactivate: registry.deactivateDID(did) -- controller only, irreversible.
Resolve: Precompile 0x0060 or registry.resolve(did) -- returns DID document.

Cross-Chain Resolution

Warp messaging (LP-6022) enables resolving a DID registered on one chain from another. The resolver precompile queries the origin chain via Warp if the DID prefix does not match the local chain.

Security Considerations

1. Controller key rotation must be atomic -- old and new keys are never simultaneously valid.

2. Deactivation is permanent. A deactivated DID cannot be reactivated.

3. DID documents do not store private keys. Only public keys and service endpoints.

Reference

| Resource | Location |

|----------|----------|

| DIDRegistry contract | github.com/luxfi/standard/contracts/identity/DIDRegistry.sol |

| DID resolver precompile | github.com/luxfi/evm/precompile/contracts/did.go |

| W3C DID Core 1.0 | https://www.w3.org/TR/did-core/ |

Copyright

Licensed under the MIT License.