Add did:ethr resolver demo

Signed-off-by: Patrik Stas <patrik.stas@absa.africa>

.gitignore

@@ -1,4 +1,5 @@
 .env
 .DS_Store
-.idea
+**/.idea
+**/node_modules
 .env

README.md

@@ -102,10 +102,23 @@ The demo within the Rust crate walks thru the following:
 
 ## Run
 
-To setup and run the demo:
-1. create your `.env` file in the root of this project. Using `.env.example` as an example.
-2. within `anoncreds-smart-contracts-js`: `npm install`
-3. within `anoncreds-smart-contracts-js`: use hardhat to run a local ledger in a seperate terminal: `npx hardhat node`
-4. within `anoncreds-smart-contracts-js`: use hardhat to deploy the `AnoncredsRegistry` & `EthereumDIDRegistry` contract to the local ledger: `npx hardhat run --network localhost scripts/deploy.ts`
-   - Lookup value `Contract address` in the output. You need to provide in the next step as env variable.
-5. within `eth-anoncreds-rust-demo`: run the demo!: `ANONCRED_REGISTRY_ADDRESS=<the_value_from_previous_step> cargo run`
+#### Stage 1 - start local ethereum network
+1. Create your `.env` file in the root of this project. Using `.env.example` as an example.
+2. In directory `anoncreds-smart-contracts-js` run `npm install`.
+3. In directory `anoncreds-smart-contracts-js` run `npx hardhat node` to spin up local ethereum network. You have to keep this console window running.
+
+#### Stage 2 - deploy contracts
+1. In directory `anoncreds-smart-contracts-js`: run `npx hardhat run --network localhost scripts/deploy.ts`
+  - This will deploy the `AnoncredsRegistry` & `EthereumDIDRegistry` contracts to your local network.
+  - In the output, lookout for the `Contract Address` values for both of these contracts. We are going to need these soon.
+
+#### Stage 3 - run anoncreds demo 
+1. In directory `eth-anoncreds-rust-demo` run the anoncreds issuance demo `ANONCRED_REGISTRY_ADDRESS=<Your_AnoncredsRegistry> cargo run`
+  - This will run demo which will register a `did:ethr` DID
+  - Under that DID, it will create a schema, credential definition and revocation registry definition
+  - The demo then proceed with issuance of credential and proof presentation
+
+#### Stage 4 - resolve DID Document for your DID
+1. In directory `didethr-resolver-js` run `npm install`
+2. In directory `didethr-resolver-js` run `DID_REGISTRY_ADDRESS=<Your_Anoncreds_Registry> DID=<Your_DID> npm run demo`
+  - Make sure to provide correct env variables. You can find your DID in the output of the anoncreds demo from the previous stage.

didethr-resolver-js/README.md

@@ -0,0 +1,60 @@
+# did:ethr resolver demo
+
+This demo assumes you have already executed `eth-anoncreds-rust-demo` which
+creates registers `did:ethr` in DID registry.
+
+This demo resolves the created Did Document for the registered DID using JS `did:ethr`
+resolver implementation based on:
+- [`did-resolver`](https://github.com/decentralized-identity/did-resolver)
+- [`ethr-did-resolver`](https://github.com/decentralized-identity/ethr-did-resolver)
+
+# Instructions
+1. Install dependencies
+```sh
+npm install
+```
+
+2. Run demo 
+```
+DID_REGISTRY_ADDRESS=<your_registry_address> DID=<your_did> npm run demo
+```
+
+If no env variables are provided, following defaults are used:
+- DID_REGISTRY_ADDRESS: `0x5fbdb2315678afecb367f032d93f642f64180aa3`
+- DID: `did:ethr:gmtest:0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266`
+
+The demo should output resolved DID Document, such as:
+```json
+
+{
+  "didDocumentMetadata": {
+    "versionId": "2",
+    "updated": "2023-11-21T21:01:40Z"
+  },
+  "didResolutionMetadata": {
+    "contentType": "application/did+ld+json"
+  },
+  "didDocument": {
+    "id": "did:ethr:gmtest:0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266",
+    "verificationMethod": [
+      {
+        "id": "did:ethr:gmtest:0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266#controller",
+        "type": "EcdsaSecp256k1RecoveryMethod2020",
+        "controller": "did:ethr:gmtest:0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266",
+        "blockchainAccountId": "eip155:31337:0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266"
+      }
+    ],
+    "authentication": [
+      "did:ethr:gmtest:0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266#controller"
+    ],
+    "assertionMethod": [
+      "did:ethr:gmtest:0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266#controller"
+    ],
+    "@context": [
+      "https://www.w3.org/ns/did/v1",
+      "https://w3id.org/security/suites/secp256k1recovery-2020/v2",
+      "https://w3id.org/security/v3-unstable"
+    ]
+  }
+}
+```

didethr-resolver-js/index.js

@@ -0,0 +1,29 @@
+// import {Resolver} from 'did-resolver'
+// import {getResolver} from 'ethr-did-resolver'
+const { Resolver } = require('did-resolver');
+const { getResolver } = require('ethr-did-resolver');
+
+const did_registry_address = process.env.DID_REGISTRY_ADDRESS | "0x5fbdb2315678afecb367f032d93f642f64180aa3"
+const did_url = process.env.DID | "did:ethr:gmtest:0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266"
+
+async function run() {
+    const providerConfig = {
+        networks: [
+            { name: "gmtest", rpcUrl: "http://localhost:8545", registry: did_registry_address },
+        ]
+    }
+
+    const ethrDidResolver = getResolver(providerConfig)
+    const didResolver = new Resolver(ethrDidResolver)
+
+    const doc = await didResolver.resolve(did_url)
+    console.log(JSON.stringify(doc, null, 2))
+}
+
+run()
+    .catch(err => {
+        console.error((err))
+    })
+    .then(() => {
+        return 0
+    })

didethr-resolver-js/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "didethr-resolver",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "demo": "node index.js"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "did-resolver": "^4.1.0",
+    "ethr-did-resolver": "^10.0.0"
+  }
+}