Move and update Python examples from didkit (spruceid#6)

Also:
- Fix CD
- Add CI

Related to didkit#308

.github/workflows/ci.yml

@@ -0,0 +1,24 @@
+name: CI
+
+on: push
+
+jobs:
+  CI:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: "3.10"
+      - name: Build Wheel
+        uses: messense/maturin-action@v1
+        with:
+          manylinux: off
+          args: --find-interpreter
+      - uses: abatilo/[email protected]
+      - name: Run Tests
+        working-directory: pydidkit_tests
+        run: |
+          curl -sSL https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py | python -
+          poetry install
+          poetry run pytest

.github/workflows/release.yml

@@ -1,4 +1,4 @@
-name: CI/CD
+name: CD
 
 on:
   push:
@@ -21,12 +21,7 @@ jobs:
         uses: messense/maturin-action@v1
         with:
           target: ${{ matrix.target }}
-          args: --release --out dist --no-sdist
-      - name: Install built wheel
-        if: matrix.target == 'x64'
-        run: |
-          pip install didkit --no-index --find-links dist --force-reinstall
-          python -c "import didkit"
+          args: --release -o dist --find-interpreter
       - name: Upload wheels
         uses: actions/upload-artifact@v2
         with:
@@ -44,12 +39,7 @@ jobs:
         uses: messense/maturin-action@v1
         with:
           target: ${{ matrix.target }}
-          args: --release --out dist --no-sdist
-      - name: Install built wheel
-        if: matrix.target == 'x64'
-        run: |
-          pip install didkit --no-index --find-links dist --force-reinstall
-          python -c "import didkit"
+          args: --release -o dist --find-interpreter
       - name: Upload wheels
         uses: actions/upload-artifact@v2
         with:
@@ -70,12 +60,7 @@ jobs:
       with:
         target: ${{ matrix.target }}
         manylinux: auto
-        args: --release --out dist
-    - name: Install built wheel
-      if: matrix.target == 'x86_64'
-      run: |
-        pip install didkit --no-index --find-links dist --force-reinstall
-        python -c "import didkit"
+        args: --release -o dist --find-interpreter
     - name: Upload wheels
       uses: actions/upload-artifact@v2
       with:

Cargo.toml

@@ -20,8 +20,8 @@ crate-type = ["cdylib"]
 didkit_core = { version = "0.4", default-features = false, features = ["secp256k1", "p256", "no-ring"], package = "didkit" }
 serde_json = "1.0"
 
-pyo3 = { version = "0.15", features = ["extension-module"] }
-pyo3-asyncio = { version = "0.15", features = ["tokio-runtime"] }
+pyo3 = { version = "0.16", features = ["extension-module"] }
+pyo3-asyncio = { version = "0.16", features = ["tokio-runtime"] }
 tokio = "1.17"
 
 [build-dependencies]

examples/python-flask/.gitignore

@@ -0,0 +1,3 @@
+key.jwk
+**/__pycache__/
+dist

examples/python-flask/README.md

@@ -0,0 +1,21 @@
+# Flask Example
+
+This project demonstrates use of verifiable credentials and presentation  for an
+application.
+
+## Dependencies
+
+- Poetry ([installation instructions](https://python-poetry.org/docs/#installation))
+- Python 3.7 or higher
+
+### Python dependencies
+
+```bash
+$ poetry install
+```
+
+## Running
+
+```bash
+$ poetry run main
+```

examples/python-flask/didkit_flask/__init__.py

@@ -0,0 +1 @@
+__version__ = "0.1.0"

examples/python-flask/didkit_flask/issue_credential.py

@@ -0,0 +1,45 @@
+import json
+import uuid
+from datetime import datetime, timedelta
+
+from didkit import issue_credential, key_to_did, key_to_verification_method
+
+
+async def req_issue_vc(request):
+    with open("key.jwk", "r") as f:
+        key = f.readline()
+    f.close()
+
+    did_key = request.form.get("subject_id", key_to_did("key", key))
+    verification_method = await key_to_verification_method("key", key)
+    issuance_date = datetime.utcnow().replace(microsecond=0)
+    expiration_date = issuance_date + timedelta(weeks=24)
+
+    credential = {
+        "id": "urn:uuid:" + uuid.uuid4().__str__(),
+        "@context": [
+            "https://www.w3.org/2018/credentials/v1",
+            "https://www.w3.org/2018/credentials/examples/v1",
+        ],
+        "type": ["VerifiableCredential"],
+        "issuer": did_key,
+        "issuanceDate": issuance_date.isoformat() + "Z",
+        "expirationDate": expiration_date.isoformat() + "Z",
+        "credentialSubject": {
+            "@context": [{"username": "https://schema.org/Text"}],
+            "id": "urn:uuid:" + uuid.uuid4().__str__(),
+            "username": "Someone",
+        },
+    }
+
+    didkit_options = {
+        "proofPurpose": "assertionMethod",
+        "verificationMethod": verification_method,
+    }
+
+    credential = await issue_credential(
+        credential.__str__().replace("'", '"'),
+        didkit_options.__str__().replace("'", '"'),
+        key,
+    )
+    return json.loads(credential)

examples/python-flask/didkit_flask/main.py

@@ -0,0 +1,66 @@
+import errno
+import json
+import os
+from socket import AF_INET, SOCK_DGRAM, socket
+
+from didkit import generate_ed25519_key
+from flask import Flask, jsonify, render_template, request
+from flask_qrcode import QRcode
+
+from didkit_flask.issue_credential import req_issue_vc
+
+app = Flask(__name__)
+qrcode = QRcode(app)
+
+
+@app.route("/")
+def index():
+    s = socket(AF_INET, SOCK_DGRAM)
+    try:
+        s.connect(("10.255.255.255", 1))
+        IP = s.getsockname()[0]
+    except Exception:
+        IP = "127.0.0.1"
+    finally:
+        s.close()
+
+    url = (
+        (request.is_secure and "https://" or "http://")
+        + IP
+        + ":"
+        + request.host.split(":")[-1]
+        + "/wallet"
+    )
+
+    return render_template("index.html", url=url)
+
+
+@app.route("/credential", methods=["GET", "POST"])
+async def credential():
+    credential = json.dumps(await req_issue_vc(request), indent=2, sort_keys=True)
+
+    return render_template("credential.html", credential=credential)
+
+
+@app.route("/wallet", methods=["GET", "POST"])
+async def wallet():
+    credential = await req_issue_vc(request)
+    if request.method == "GET":
+        return jsonify({"type": "CredentialOffer", "credentialPreview": credential})
+    elif request.method == "POST":
+        return jsonify(credential)
+
+
+def main():
+    flags = os.O_CREAT | os.O_EXCL | os.O_WRONLY
+    try:
+        file_handle = os.open("key.jwk", flags)
+    except OSError as e:
+        if e.errno == errno.EEXIST:
+            pass
+        else:
+            raise
+    else:
+        with os.fdopen(file_handle, "w") as file_obj:
+            file_obj.write(generate_ed25519_key())
+    app.run(host="0.0.0.0", port=5001)

examples/python-flask/didkit_flask/templates/credential.html

@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <link href="https://unpkg.com/tailwindcss@^2/dist/tailwind.min.css" rel="stylesheet">
+    <title>DIDKit Django</title>
+  </head>
+  <body class="h-screen w-screen flex">
+    <pre class="whitespace-pre-wrap m-auto">{{ credential }}</pre>
+  </body>
+</html>

examples/python-flask/didkit_flask/templates/index.html

@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <link href="https://unpkg.com/tailwindcss@^2/dist/tailwind.min.css" rel="stylesheet">
+    <title>DIDKit Django</title>
+  </head>
+  <body class="flex flex-col items-center justify-center h-screen w-screen">
+      <form class="flex items-center justify-center mb-4" method="post" action="/credential">
+        <input type="text" placeholder="Enter your DID:" class="h-12 p-4 border border-blue-900 rounded mr-4" name="subject_id" />
+        <button
+          class="h-12 p-2 border border-blue-900 rounded"
+          type="submit"
+        >
+          Get credential
+        </button>
+      </form>
+      <p>or scan the QRCode bellow with your wallet. i.e: Credible</p>
+      <div class="my-8"><img src={{ qrcode(url) }} class="w-32 h-32"></div>
+      <p>or</p>
+      <a href="/credential">
+        <button
+          class="h-12 p-2 border mt-6 border-blue-900 rounded"
+          type="submit"
+        >
+          Get server issued credential
+        </button>
+      </a>
+  </body>
+</html>