etd-did

DID

Define a new did method etd-did based on W3C did protocol.

• did identifier：did:etd:<etd address>

DID Document

DID Document properties

Properties	Required	Value constraints
id	yes	A string of etd-did
controller	no	A string or a set of strings of etd-did
verificationMethod	no	A set of Verification Method maps
authentication	no	A representation of Verification Method
proxyWallet	no	A representation of Verification Method
service	no	A set of Service Endpoint maps

authentication

Used for the verification of storj storage service based on DID.

proxywallet

To ensure the security of the DID and its associated assets, we assign certain transferable DIDs to corresponding contract addresses, similar to the role of a proxy wallet, in order to safeguard the security of the assets associated with the DID during asset transfers.

service

• id

  • the unique identifier of service

• type

  • SHOULD be registered in the DID Specification Registries
  

• service Endpoint

Example 1 of DID document

{
  "@context": [
      "https://www.w3.org/ns/did/v1",
      "https://w3cid.org/security/suites/secp256k1recovery-2020/v2"
  ],
  "id": "did:etd:0x7c...",
  "controller": "did:etd:0x7c...",
  "verificationMethod": [
    {
        "id": "did:etd:0x7c...#storj",
        "type": "EcdsaSecp256k1VerificationKey",
        "controller": "did:etd:0x7c...",
        "publicKeyMultibase": "0x7c..."
	},{
        "id": "did:etd:123456789abcdefghi#proxywallet-1",
        "type": "Ed25519VerificationKey2020",
        "controller": "did:example:123456789abcdefghi",
        "ethereumAddress": "0xF3beAC30C498D9E26865F34fCAa57dBB935b0D74"
    }
  ],
  "authentication": [
    "did:etd:0x7...#storj",
    {
      "id": "did:etd:0x7...#storj-auth",
      "type": "Ed25519VerificationKey2020",
      "controller": "did:etd:0x7...",
      "publicKeyMultibase": "0x89..."
    }
  ],
  "proxywallet": [
    "did:etd:123456789abcdefghi#proxywallet",
    {
      "id": "did:etd:123456789abcdefghi#proxywallet-1",
      "type": "Ed25519VerificationKey2020",
      "controller": "did:example:123456789abcdefghi",
      "ethereumAddress": "0xF3beAC30C498D9E26865F34fCAa57dBB935b0D74"
    }
  ]
}

Example 2 of DID document

// the example of the service provider - storj
{
  "@context": [
      "https://www.w3.org/ns/did/v1",
      "https://w3cid.org/security/suites/secp256k1recovery-2020/v2"
  ],
  "id": "did:etd:0x69...",
  "controller": "did:etd:0x69...",
  "verificationMethod": [
    {
        "id": "did:etd:0x69...#key-1",
        "type": "EcdsaSecp256k1VerificationKey",
        "controller": "did:etd:0x69...",
        "publicKeyMultibase": "0x69..."
	}],
  "service": [
    {
      "id":"did:etd:0x69...#storj",
      "type": "LinkedDomains",
      "serviceEndpoint": {
        "upload": "https://www.etd.storj.io/upload",
          ...
      }
    }
]
}

Contract

• ETDDIDReg.sol: It contains some basic operations of did, including creating, modifying property etc.
• ENS.sol: Etd Name Service.

ETDDIDReg.sol

Contract Address: 0x78A78Ea68BBBc11a196D576E9564b9B95A23B801

Events

• AttributeChanged
• OwnerChanged

Methods

• createWeId()：Create and register did.
  • address identity：It can receive either a wallet address or a locally created ETD address and use the wallet address as the controller of did.
  • bytes memory alsoknownas：Custom, such as "ETD Wallet"
  • bytes memory created：Create timestamp
  • int updated：Expiration time. 0 indicates permanent
• changeOwner ()：Change the did Controller
  • address identity：did
  • address newOwner：New owner of did
• setAttribute()：Update the property of did
  • address identity：did
  • bytes32 name：Attribute name
  • bytes memory value：Attribute value
  • int updated：Update

DIDNameReg.sol

Contract Address: 0x0eFCC08cD9831CE3d72c362A5b92011AAD26B23e