docs: Simple python example

.gitignore

@@ -12,9 +12,17 @@
 # mdBook
 build/
 
+# Python
+__pycache__/
+.venv/
+*.pyc
+
 # Misc
 *.key
 .env
 config.yml
 working_dir
 *.log
+
+# Walrus binary
+examples/CONFIG/bin/walrus

examples/CONFIG/bin/README.md

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+# Configuration
+
+Place the 'walrus' client binary for your system in this directory.

examples/CONFIG/config_dir/client_config.yaml

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+system_pkg: 0x17108fb344dbea0d315e6f44cdd3af12a028cd568bafcbfb7f7a7b152719d15d
+system_object: 0x3fb18e675ad41158f59acbdb7f574136a198cbd83be9b968c0fdeaa139c312f9
+
+# You can define a custom path to your Sui wallet configuration here. If this is unset or `null`,
+# the wallet is configured from `./client.yaml`, `./sui_config.yaml` (both relative to your current
+# working directory), or `~/.sui/sui_config/client.yaml` in this order.
+wallet_config: null
+
+# Default values for the client are commented out.
+#
+# There is no risk in playing around with these values.
+# Worst case, you may not be able to store/read from Walrus.
+
+# communication_config:
+#   max_concurrent_writes: null
+#   max_concurrent_sliver_reads: null
+#   max_concurrent_metadata_reads: 3
+#   reqwest_config:
+#     total_timeout:
+#       secs: 180
+#       nanos: 0
+#     pool_idle_timeout: null
+#     http2_keep_alive_timeout:
+#       secs: 5
+#       nanos: 0
+#     http2_keep_alive_interval:
+#       secs: 30
+#       nanos: 0
+#     http2_keep_alive_while_idle: true
+#   request_rate_config:
+#     max_node_connections: 10
+#     max_retries: 5
+#     min_backoff:
+#       secs: 2
+#       nanos: 0
+#     max_backoff:
+#       secs: 60
+#       nanos: 0

examples/python/README.md

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+# Walrus Python Examples
+
+## Prerequisites
+
+- [Configure Sui Client](https://docs.sui.io/guides/developer/getting-started/connect) to connect
+  to testnet, and some testnet Sui tokens.
+- Configure Walrus TODO(#12).
+- Update the paths PATH_TO_WALRUS and PATH_TO_WALRUS_CONFIG and other
+  constant in `utils.py`.
+
+## Index of examples
+
+- ...

examples/python/hello_walrus_jsonapi.py

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+# Example of uploading and downloading a file to / from the Walrus service
+# Using the walrus client json input & output facilities.
+
+# Std lib imports
+import os
+import subprocess
+import json
+import tempfile
+import base64
+
+import requests
+
+from utils import num_to_blob_id, PATH_TO_WALRUS, PATH_TO_WALRUS_CONFIG, FULL_NODE_URL
+
+try:
+    # Create a 1MB file of random data
+    random_data = os.urandom(1024 * 1024)
+    tmp = tempfile.NamedTemporaryFile(delete=False)
+    tmp.write(random_data)
+    tmp.close()
+
+    # Part 1. Upload the file to the Walrus service
+    store_json_command = f"""{{ "config" : "{PATH_TO_WALRUS_CONFIG}",
+        "command" : {{ "store" :
+        {{ "file" : "{tmp.name}", "epochs" : 2  }}}}
+    }}"""
+    result = subprocess.run(
+        [PATH_TO_WALRUS, "json"],
+        text=True,
+        capture_output=True,
+        input=store_json_command,
+    )
+    assert result.returncode == 0
+
+    # Parse the response and display key information
+    json_result_dict = json.loads(result.stdout.strip())
+    print(
+        f"Upload Blob ID: {json_result_dict['blob_id']} Size {len(random_data)} bytes"
+    )
+    sui_object_id = json_result_dict["sui_object_id"]
+    blob_id = json_result_dict["blob_id"]
+    print(f"Certificate in Object ID: {sui_object_id}")
+
+    # Part 2. Download the file from the Walrus service
+    read_json_command = f"""{{ "config" : "{PATH_TO_WALRUS_CONFIG}",
+        "command" : {{ "read" :
+        {{ "blob_id" : "{json_result_dict['blob_id']}" }}}}
+    }}"""
+    result = subprocess.run(
+        [PATH_TO_WALRUS, "json"],
+        text=True,
+        capture_output=True,
+        input=read_json_command,
+    )
+    assert result.returncode == 0
+
+    # Parse the response and display key information
+    json_result_dict = json.loads(result.stdout.strip())
+    downloaded_data = base64.b64decode(json_result_dict["blob"])
+    assert downloaded_data == random_data
+
+    print(
+        f"Download Blob ID: {json_result_dict['blob_id']} Size {len(downloaded_data)} bytes"
+    )
+
+    # Part 3. Check the availability of the blob
+    request = {
+        "jsonrpc": "2.0",
+        "id": 1,
+        "method": "sui_getObject",
+        "params": [
+            sui_object_id,
+            {
+                "showType": True,
+                "showOwner": False,
+                "showPreviousTransaction": True,
+                "showDisplay": False,
+                "showContent": True,
+                "showBcs": False,
+                "showStorageRebate": False,
+            },
+        ],
+    }
+    response = requests.post(FULL_NODE_URL, json=request)
+    object_content = response.json()["result"]["data"]["content"]
+    print("Object content:")
+    print(json.dumps(object_content, indent=4))
+
+    # Check that the blob ID matches the one we uploaded
+    blob_id_downloaded = int(object_content["fields"]["blob_id"])
+    if num_to_blob_id(blob_id_downloaded) == blob_id:
+        print("Blob ID matches certificate!")
+    else:
+        print("Blob ID does not match")
+
+finally:
+    os.unlink(tmp.name)

examples/python/hello_walrus_sui_system.py

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+# Example of querying the Walrus system object on Sui
+
+# Std lib imports
+import requests
+import re
+
+from utils import PATH_TO_WALRUS_CONFIG
+
+system_object_id = re.findall(
+    r"system_object:[ ]*(.*)", open(PATH_TO_WALRUS_CONFIG).read()
+)[0]
+print(f"System object ID: {system_object_id}")
+
+# Query the Walrus system object on Sui
+request = {
+    "jsonrpc": "2.0",
+    "id": 1,
+    "method": "sui_getObject",
+    "params": [
+        system_object_id,
+        {
+            "showType": True,
+            "showOwner": False,
+            "showPreviousTransaction": True,
+            "showDisplay": False,
+            "showContent": True,
+            "showBcs": False,
+            "showStorageRebate": False,
+        },
+    ],
+}
+response = requests.post("https://fullnode.testnet.sui.io:443", json=request)
+assert response.status_code == 200
+
+system_object_content = response.json()["result"]["data"]["content"]["fields"]
+committee = system_object_content["current_committee"]["fields"]["bls_committee"][
+    "fields"
+]
+
+print(
+    f'Current walrus epoch: {system_object_content["current_committee"]["fields"]["epoch"]}'
+)
+print(
+    f'Number of members: {len(committee["members"])} Number of shards: {committee["n_shards"]}'
+)
+print(f'Price per unit size: {system_object_content["price_per_unit_size"]} MIST')
+print(f'Total capacity size: {system_object_content["total_capacity_size"]} bytes')
+print(f'Used capacity size: {system_object_content["used_capacity_size"]} bytes')

examples/python/hello_walrus_webapi.py

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+# Example of uploading and downloading a file to / from the Walrus service
+# Using the walrus client web API facilities.
+#
+# Prerequisites:
+#
+# - Run the Walrus client in daemon mode:
+#   $ ../CONFIG/bin/walrus --config ../CONFIG/config_dir/client_config.yaml daemon -b 127.0.0.1:8899
+#
+
+# Std lib imports
+import os
+import time
+
+# External requests HTTP library
+import requests
+
+ADDRESS = "127.0.0.1:8899"
+EPOCHS = "5"
+
+
+# Helper functions to upload a blob
+def upload_blob(ADDRESS, EPOCHS, data):
+    # Upload the data to the Walrus service  using a PUT request
+    store_url = f"http://{ADDRESS}/v1/store?epochs={EPOCHS}"
+    response = requests.put(store_url, data=data)
+
+    # Assert the response status code
+    assert response.status_code == 200
+    blob_id = response.text
+    return blob_id
+
+
+# Helper functions to download a blob
+def download_blob(ADDRESS, blob_id):
+    # Now read the same resource using the blob-id
+    read_url = f"http://{ADDRESS}/v1/{blob_id}"
+    response = requests.get(read_url)
+
+    # Assert the response status code
+    assert response.status_code == 200
+    return response.content
+
+
+# Upload a random 1MB string then download it, and check it matches
+if __name__ == "__main__":
+    # Generate a 1MB blob of random data
+    random_data = os.urandom(1024 * 1024)
+
+    # Upload the blob to the Walrus service
+    start_time = time.time()
+    blob_id = upload_blob(ADDRESS, EPOCHS, random_data)
+    upload_time = time.time()
+
+    # Now download the same blob using the blob-id
+    data = download_blob(ADDRESS, blob_id)
+    assert data == random_data
+    download_time = time.time()
+
+    # Print some information about the blob
+    print(f"Blob ID: {blob_id}")
+    print(f"Size {len(random_data)} bytes")
+    print(f"Upload time: {upload_time - start_time:.2f}s")
+    print(f"Download time: {download_time - upload_time:.2f}s")

examples/python/requirements.txt

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+requests>=2.22.0

examples/python/utils.py

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+import base64
+
+# Configure these paths to match your system
+FULL_NODE_URL = "https://fullnode.testnet.sui.io:443"
+PATH_TO_WALRUS = "../CONFIG/bin/walrus"
+PATH_TO_WALRUS_CONFIG = "../CONFIG/config_dir/client_config.yaml"
+
+
+# Convert a numeric (u256) blob_id to a base64 encoded Blob ID
+def num_to_blob_id(blob_id_num):
+    extracted_bytes = []
+    for i in range(32):
+        extracted_bytes += [blob_id_num & 0xFF]
+        blob_id_num = blob_id_num >> 8
+    assert blob_id_num == 0
+    blob_id_bytes = bytes(extracted_bytes)
+    encoded = base64.urlsafe_b64encode(blob_id_bytes)
+    return encoded.decode("ascii").strip("=")
+
+
+if __name__ == "__main__":
+    # A test case for the num_to_blob_id function
+    blob_id_num = (
+        46269954626831698189342469164469112511517843773769981308926739591706762839432
+    )
+    blob_id_base64 = "iIWkkUTzPZx-d1E_A7LqUynnYFD-ztk39_tP8MLdS2Y"
+    assert num_to_blob_id(blob_id_num) == blob_id_base64