IPDID

Scaling Ethereum Hackathon 2021

Speed Up DID Resolution with IPFS and SKALE network

Team Members:

Frank Wang,

Eason Chen,

Ming-Der Wang

Taipei, Taiwan 🇹🇼

Accomplishment

To Complete a MVP of a W3C DID compliance Identification System
To Implement a IPDID Node CLI (inspired by IPFS)
To Provide both iOS and Android Demo Apps for a DID Wallet
To Demo a Verifiable Credential (VC) Issuer with QR codes
To Deploy Our Smart Contract to SKALE network
To Register DID Document on IPFS (block)
To Provide a RESTful API server for DID resolvers
To Have Our IPDID Method Driver on the DIF Universal Resolver
and so on ...

< # in 3 weeks #>

Why It Calls IPDID?

It stands for

a IPFS-based Decentralized Identifier

IPDID Follows the W3C DID Standards

did:ipdid:Qm...dbM

the DID method

a IPFS block CID v0

DID

did:ipdid:QmQy...CewXEVdbM

{
  "@context": "https://w3id.org/did/v1",
  "id": "did:ipdid:QmQy3t3odW3wUmJdCwbMAQTRCVjX5VrcSegNkCewXEVdbM",
  "publicKey": [
    {
      "id": "did:ipdid:QmQy3t3odW3wUmJdCwbMAQTRCVjX5VrcSegNkCewXEVdbM",
      "type": "Ed25519VerificationKey2020",
      "controller":   
        "did:ipdid:QmQy3t3odW3wUmJdCwbMAQTRCVjX5VrcSegNkCewXEVdbM",
      "publicKeyMultibase": "zBW6drJM5ErsqLZQkZL7XAcKFaJhVK1C4bB5GviSFftuD"
    }
  ]
}

Can be resolved to a DID document for more detailed information. So that ...

So, we need some way to store and retrieve our DIDs/DID Documents

decentralized and FAST !!!

low cost, or even FREE???

IPFS

* libp2p (p2p stack)

* multiformat

* IPLD (Linked Data)

* CID v0, v1(multihashing)

* Good Documents

* Open Source

* Community

* Prizes...

SKALE

* EVM compatible

* Solidity - Smart Contract

* Fast (up to 2,000 tps per chain)

* Low Cost (0 Gas?)

* Works with Hardhat and Metamask

* Many Prizes ...

We choiced IPFS + SKALE 🔥

What We Have Done!

(during these 3 weeks)

* IPDID cli

* Universal Resolver Driver

* IPDID Wallet (iOS/Android)

* IPDID Resolver Gateway

- DID/CID/DID documents

distributed storages

- a RESTful API Server

1. DID Wallet

(mobile demo App)

It can scan DID QR codes, retrieve and display detailed information of the IDs or the claims.

Develop and Deploy via EXPO (react native)

2. IPDID CLI

Which you can use IPDID CLI to issue claims or create DIDs with QR codes.

ipdid Command

➜ ipdid --help
IPDID cli - Need to run with a ipfs node. (http://ipfs.io)

VERSION
ipdid/0.1.1 darwin-arm64 node-v16.0.0

USAGE
$ ipdid [COMMAND]

COMMANDS
did register a DID to SKALE network and IPFS (IPLD) - use pipe only
help display help for ipdid
init create a new IPDID ipfs (deprecated)
mydid return your current DID
qrcode to generate a QR-code from your context or stdin
signer create a singer's key pair and save on ~/.ipdid_keystore.json
vc create a verifiable claim for a DID document