8.84/10

dockerignore

.dockerignore

@@ -0,0 +1,5 @@
+.git
+docker-compose.yml
+Dockerfile
+README.md
+test

Pipfile

@@ -0,0 +1,13 @@
+[[source]]
+url = "https://pypi.org/simple"
+verify_ssl = true
+name = "pypi"
+
+[packages]
+requests = "==2.27.1"
+Flask = "==2.0.2"
+
+[dev-packages]
+
+[requires]
+python_version = "3.10"

Pipfile.lock

@@ -0,0 +1,146 @@
+{
+    "_meta": {
+        "hash": {
+            "sha256": "3ee84615107062eb60ff41cf23471c62c89af654722d8425b186d1e4bab2afd8"
+        },
+        "pipfile-spec": 6,
+        "requires": {
+            "python_version": "3.10"
+        },
+        "sources": [
+            {
+                "name": "pypi",
+                "url": "https://pypi.org/simple",
+                "verify_ssl": true
+            }
+        ]
+    },
+    "default": {
+        "certifi": {
+            "hashes": [
+                "sha256:78884e7c1d4b00ce3cea67b44566851c4343c120abd683433ce934a68ea58872",
+                "sha256:d62a0163eb4c2344ac042ab2bdf75399a71a2d8c7d47eac2e2ee91b9d6339569"
+            ],
+            "version": "==2021.10.8"
+        },
+        "charset-normalizer": {
+            "hashes": [
+                "sha256:2857e29ff0d34db842cd7ca3230549d1a697f96ee6d3fb071cfa6c7393832597",
+                "sha256:6881edbebdb17b39b4eaaa821b438bf6eddffb4468cf344f09f89def34a8b1df"
+            ],
+            "markers": "python_version >= '3'",
+            "version": "==2.0.12"
+        },
+        "click": {
+            "hashes": [
+                "sha256:6a7a62563bbfabfda3a38f3023a1db4a35978c0abd76f6c9605ecd6554d6d9b1",
+                "sha256:8458d7b1287c5fb128c90e23381cf99dcde74beaf6c7ff6384ce84d6fe090adb"
+            ],
+            "markers": "python_version >= '3.6'",
+            "version": "==8.0.4"
+        },
+        "flask": {
+            "hashes": [
+                "sha256:7b2fb8e934ddd50731893bdcdb00fc8c0315916f9fcd50d22c7cc1a95ab634e2",
+                "sha256:cb90f62f1d8e4dc4621f52106613488b5ba826b2e1e10a33eac92f723093ab6a"
+            ],
+            "index": "pypi",
+            "version": "==2.0.2"
+        },
+        "idna": {
+            "hashes": [
+                "sha256:84d9dd047ffa80596e0f246e2eab0b391788b0503584e8945f2368256d2735ff",
+                "sha256:9d643ff0a55b762d5cdb124b8eaa99c66322e2157b69160bc32796e824360e6d"
+            ],
+            "markers": "python_version >= '3'",
+            "version": "==3.3"
+        },
+        "itsdangerous": {
+            "hashes": [
+                "sha256:29285842166554469a56d427addc0843914172343784cb909695fdbe90a3e129",
+                "sha256:d848fcb8bc7d507c4546b448574e8a44fc4ea2ba84ebf8d783290d53e81992f5"
+            ],
+            "markers": "python_version >= '3.7'",
+            "version": "==2.1.0"
+        },
+        "jinja2": {
+            "hashes": [
+                "sha256:077ce6014f7b40d03b47d1f1ca4b0fc8328a692bd284016f806ed0eaca390ad8",
+                "sha256:611bb273cd68f3b993fabdc4064fc858c5b47a973cb5aa7999ec1ba405c87cd7"
+            ],
+            "markers": "python_version >= '3.6'",
+            "version": "==3.0.3"
+        },
+        "markupsafe": {
+            "hashes": [
+                "sha256:023af8c54fe63530545f70dd2a2a7eed18d07a9a77b94e8bf1e2ff7f252db9a3",
+                "sha256:09c86c9643cceb1d87ca08cdc30160d1b7ab49a8a21564868921959bd16441b8",
+                "sha256:142119fb14a1ef6d758912b25c4e803c3ff66920635c44078666fe7cc3f8f759",
+                "sha256:1d1fb9b2eec3c9714dd936860850300b51dbaa37404209c8d4cb66547884b7ed",
+                "sha256:204730fd5fe2fe3b1e9ccadb2bd18ba8712b111dcabce185af0b3b5285a7c989",
+                "sha256:24c3be29abb6b34052fd26fc7a8e0a49b1ee9d282e3665e8ad09a0a68faee5b3",
+                "sha256:290b02bab3c9e216da57c1d11d2ba73a9f73a614bbdcc027d299a60cdfabb11a",
+                "sha256:3028252424c72b2602a323f70fbf50aa80a5d3aa616ea6add4ba21ae9cc9da4c",
+                "sha256:30c653fde75a6e5eb814d2a0a89378f83d1d3f502ab710904ee585c38888816c",
+                "sha256:3cace1837bc84e63b3fd2dfce37f08f8c18aeb81ef5cf6bb9b51f625cb4e6cd8",
+                "sha256:4056f752015dfa9828dce3140dbadd543b555afb3252507348c493def166d454",
+                "sha256:454ffc1cbb75227d15667c09f164a0099159da0c1f3d2636aa648f12675491ad",
+                "sha256:598b65d74615c021423bd45c2bc5e9b59539c875a9bdb7e5f2a6b92dfcfc268d",
+                "sha256:599941da468f2cf22bf90a84f6e2a65524e87be2fce844f96f2dd9a6c9d1e635",
+                "sha256:5ddea4c352a488b5e1069069f2f501006b1a4362cb906bee9a193ef1245a7a61",
+                "sha256:62c0285e91414f5c8f621a17b69fc0088394ccdaa961ef469e833dbff64bd5ea",
+                "sha256:679cbb78914ab212c49c67ba2c7396dc599a8479de51b9a87b174700abd9ea49",
+                "sha256:6e104c0c2b4cd765b4e83909cde7ec61a1e313f8a75775897db321450e928cce",
+                "sha256:736895a020e31b428b3382a7887bfea96102c529530299f426bf2e636aacec9e",
+                "sha256:75bb36f134883fdbe13d8e63b8675f5f12b80bb6627f7714c7d6c5becf22719f",
+                "sha256:7d2f5d97fcbd004c03df8d8fe2b973fe2b14e7bfeb2cfa012eaa8759ce9a762f",
+                "sha256:80beaf63ddfbc64a0452b841d8036ca0611e049650e20afcb882f5d3c266d65f",
+                "sha256:84ad5e29bf8bab3ad70fd707d3c05524862bddc54dc040982b0dbcff36481de7",
+                "sha256:8da5924cb1f9064589767b0f3fc39d03e3d0fb5aa29e0cb21d43106519bd624a",
+                "sha256:961eb86e5be7d0973789f30ebcf6caab60b844203f4396ece27310295a6082c7",
+                "sha256:96de1932237abe0a13ba68b63e94113678c379dca45afa040a17b6e1ad7ed076",
+                "sha256:a0a0abef2ca47b33fb615b491ce31b055ef2430de52c5b3fb19a4042dbc5cadb",
+                "sha256:b2a5a856019d2833c56a3dcac1b80fe795c95f401818ea963594b345929dffa7",
+                "sha256:b8811d48078d1cf2a6863dafb896e68406c5f513048451cd2ded0473133473c7",
+                "sha256:c532d5ab79be0199fa2658e24a02fce8542df196e60665dd322409a03db6a52c",
+                "sha256:d3b64c65328cb4cd252c94f83e66e3d7acf8891e60ebf588d7b493a55a1dbf26",
+                "sha256:d4e702eea4a2903441f2735799d217f4ac1b55f7d8ad96ab7d4e25417cb0827c",
+                "sha256:d5653619b3eb5cbd35bfba3c12d575db2a74d15e0e1c08bf1db788069d410ce8",
+                "sha256:d66624f04de4af8bbf1c7f21cc06649c1c69a7f84109179add573ce35e46d448",
+                "sha256:e67ec74fada3841b8c5f4c4f197bea916025cb9aa3fe5abf7d52b655d042f956",
+                "sha256:e6f7f3f41faffaea6596da86ecc2389672fa949bd035251eab26dc6697451d05",
+                "sha256:f02cf7221d5cd915d7fa58ab64f7ee6dd0f6cddbb48683debf5d04ae9b1c2cc1",
+                "sha256:f0eddfcabd6936558ec020130f932d479930581171368fd728efcfb6ef0dd357",
+                "sha256:fabbe18087c3d33c5824cb145ffca52eccd053061df1d79d4b66dafa5ad2a5ea",
+                "sha256:fc3150f85e2dbcf99e65238c842d1cfe69d3e7649b19864c1cc043213d9cd730"
+            ],
+            "markers": "python_version >= '3.7'",
+            "version": "==2.1.0"
+        },
+        "requests": {
+            "hashes": [
+                "sha256:68d7c56fd5a8999887728ef304a6d12edc7be74f1cfa47714fc8b414525c9a61",
+                "sha256:f22fa1e554c9ddfd16e6e41ac79759e17be9e492b3587efa038054674760e72d"
+            ],
+            "index": "pypi",
+            "version": "==2.27.1"
+        },
+        "urllib3": {
+            "hashes": [
+                "sha256:000ca7f471a233c2251c6c7023ee85305721bfdf18621ebff4fd17a8653427ed",
+                "sha256:0e7c33d9a63e7ddfcb86780aac87befc2fbddf46c58dbb487e0855f7ceec283c"
+            ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4'",
+            "version": "==1.26.8"
+        },
+        "werkzeug": {
+            "hashes": [
+                "sha256:1421ebfc7648a39a5c58c601b154165d05cf47a3cd0ccb70857cbdacf6c8f2b8",
+                "sha256:b863f8ff057c522164b6067c9e28b041161b4be5ba4d0daceeaa50a163822d3c"
+            ],
+            "markers": "python_version >= '3.6'",
+            "version": "==2.0.3"
+        }
+    },
+    "develop": {}
+}

app.py

@@ -1,9 +1,12 @@
-from time import time
+#!/usr/bin/env python
-from flask import Flask, request
+"""Flask server to serve the block API."""
+
 import json
-from uuid import uuid4
+from time import time
-from blockchain import Blockchain, Transaction, Block
 import argparse
+from uuid import uuid4
+from flask import Flask, request
+from blockchain import Blockchain, Transaction, Block
 
 parser = argparse.ArgumentParser(description="A blockchain simulation")
 parser.add_argument("-p", "--port", type=int, help="Port number", default=80)
@@ -13,18 +16,19 @@ port = args.port
 
 app = Flask(__name__)
 
-node_identifier = str(uuid4()).replace("-", "")
+NODE_IDENTIFIER = str(uuid4()).replace("-", "")
 
 blockchain = Blockchain()
 
 
 @app.route("/mine", methods=["GET"])
 def mine():
+    """Mine samy coin."""
     last_block = blockchain.blocks[-1]
     last_proof = last_block.proof
     proof = blockchain.proof_of_work(last_proof)
 
-    transaction = Transaction("Network", node_identifier, 50)
+    transaction = Transaction("Network", NODE_IDENTIFIER, 50)
     blockchain.new_transaction(transaction)
     block = Block(
         len(blockchain.blocks) + 1,
@@ -40,6 +44,7 @@ def mine():
 
 @app.route("/transactions/new", methods=["POST"])
 def new_transaction():
+    """Submit a new transaction."""
     values = request.get_json()
     transaction = Transaction(values["sender"], values["recipient"], values["amount"])
     blockchain.new_transaction(transaction)
@@ -49,27 +54,29 @@ def new_transaction():
 
 @app.route("/chain", methods=["GET"])
 def chain():
+    """Display the block chain."""
     return json.dumps([b.__dict__ for b in blockchain.blocks])
 
 
 @app.route("/nodes", methods=["GET"])
 def nodes():
+    """List known nodes."""
     return json.dumps(list(blockchain.nodes))
 
 
 @app.route("/register", methods=["POST"])
 def register_nodes():
-    values = request.get_json()
+    """Register a new node."""
-    nodes = values["nodes"]
+    json_values = request.get_json()
-
+    for node in json_values["nodes"]:
-    for node in nodes:
         blockchain.register_node(node)
 
     return "New node has been added\n"
 
 
 @app.route("/resolve", methods=["GET"])
-def consensus():
+def resolve():
+    """Resolve the blockchain."""
     replaced = blockchain.resolve_conflicts()
 
     if replaced:

blockchain.py

@@ -1,3 +1,5 @@
+#!/usr/bin/env python
+
 import hashlib
 from time import time
 import json
@@ -87,6 +89,32 @@ class Blockchain:
 
         return True
 
+    def json_to_transactions(self, transactions_json):
+        transactions = [
+            Transaction(
+                transaction["sender"],
+                transaction["recipient"],
+                transaction["amount"],
+            )
+            for transaction in transactions_json
+        ]
+
+        return transactions
+
+    def json_to_chain(self, chain_json):
+        chain = [
+            Block(
+                block["index"],
+                block["timestamp"],
+                self.json_to_transactions(block["transactions"]),
+                block["previous_hash"],
+                block["proof"],
+            )
+            for block in chain_json
+        ]
+
+        return chain
+
     def resolve_conflicts(self):
         neighbours = self.nodes
         new_chain = None
@@ -100,10 +128,10 @@ class Blockchain:
 
             if length > max_lengh and self.valid_chain(chain):
                 max_lengh = length
-                new_chain = chain
+                new_chain = self.json_to_chain(chain)
 
         if new_chain:
-            self.chain = new_chain
+            self.blocks = new_chain
             return True
 
         return False

test

@@ -1,8 +1,9 @@
 #!/bin/sh
 
-curl "localhost:5123/register" -H "Content-Type: application/json" -d '{"nodes": ["http://127.0.0.1:5000"]}'
+curl "localhost:5001/register" -H "Content-Type: application/json" -d '{"nodes": ["http://127.0.0.1:5000"]}'
 curl "localhost:5000/transactions/new" -H "Content-Type: application/json" -d '{"sender": "marc", "recipient": "samy", "amount": 50}'
 curl "localhost:5000/mine"
 curl -s "localhost:5000/chain" | jq
-curl -s "localhost:5123/chain" | jq
+curl -s "localhost:5001/chain" | jq
-curl "localhost:5123/resolve"
+curl "localhost:5001/resolve"
+curl -s "localhost:5001/chain" | jq