/BCND-P4-star-notary

Primary LanguageJavaScript

Blockchain ND Project 4 - Private Blockchain Notary Service

Introduciton

This project provides a star registry service that allows users to claim ownership of a star. Base on a RESTful API and a private blockchain, users can lookup registered stars in the blockchain, claim a new star's ownership using his/her blockchain identity, and share a story of the claimed star.

Deployment

This program relies on node 9.6+ and npm package manager.

npm install
node app.js

After deployment, API service is then available at http://localhost:8000.

Testing

A dedicated testing script is provided to ensure all API endpoints are functional according to design.

node test.js

Endpoints

Endpoints are categorized into 3 categories:

  • Validation: for users to validate their own identity
  • Registration: register a new star entry
  • Lookup: search registered records

Validation

Request for validation

POST /requestValidation

Sample request

curl -X "POST" "http://localhost:8000/requestValidation" \
     -H 'Content-Type: application/json; charset=utf-8' \
     -d $'{
  "address": "142BDCeSGbXjWKaAnYXbMpZ6sbrSAo3DpZ"
}'

Sample response

{
  "address": "142BDCeSGbXjWKaAnYXbMpZ6sbrSAo3DpZ",
  "requestTimeStamp": "1532296090",
  "message": "142BDCeSGbXjWKaAnYXbMpZ6sbrSAo3DpZ:1532296090:starRegistry",
  "validationWindow": 300
}

Sign validation message

POST /message-signature/validate

Sample request

curl -X "POST" "http://localhost:8000/message-signature/validate" \
     -H 'Content-Type: application/json; charset=utf-8' \
     -d $'{
  "address": "142BDCeSGbXjWKaAnYXbMpZ6sbrSAo3DpZ",
  "signature": "H6ZrGrF0Y4rMGBMRT2+hHWGbThTIyhBS0dNKQRov9Yg6GgXcHxtO9GJN4nwD2yNXpnXHTWU9i+qdw5vpsooryLU="
}'

Sample response

{
  "registerStar": true,
  "status": {
    "address": "142BDCeSGbXjWKaAnYXbMpZ6sbrSAo3DpZ",
    "requestTimeStamp": "1532296090",
    "message": "142BDCeSGbXjWKaAnYXbMpZ6sbrSAo3DpZ:1532296090:starRegistry",
    "validationWindow": 193,
    "messageSignature": "valid"
  }
}

Registration

Register entry

POST /block

Sample request

curl -X "POST" "http://localhost:8000/block" \
     -H 'Content-Type: application/json; charset=utf-8' \
     -d $'{
  "address": "142BDCeSGbXjWKaAnYXbMpZ6sbrSAo3DpZ",
  "star": {
    "dec": "-26° 29'\'' 24.9",
    "ra": "16h 29m 1.0s",
    "story": "Found star using https://www.google.com/sky/"
  }
}'

Sample response

{
  "hash": "a59e9e399bc17c2db32a7a87379a8012f2c8e08dd661d7c0a6a4845d4f3ffb9f",
  "height": 1,
  "body": {
    "address": "142BDCeSGbXjWKaAnYXbMpZ6sbrSAo3DpZ",
    "star": {
      "ra": "16h 29m 1.0s",
      "dec": "-26° 29' 24.9",
      "story": "466f756e642073746172207573696e672068747470733a2f2f7777772e676f6f676c652e636f6d2f736b792f"
    }
  },
  "time": "1532296234",
  "previousBlockHash": "49cce61ec3e6ae664514d5fa5722d86069cf981318fc303750ce66032d0acff3"
}

Lookup

Search by address

GET /stars/address:[ADDRESS]

Sample request

curl "http://localhost:8000/stars/address:142BDCeSGbXjWKaAnYXbMpZ6sbrSAo3DpZ"

Sample response:

[
  {
    "hash": "a59e9e399bc17c2db32a7a87379a8012f2c8e08dd661d7c0a6a4845d4f3ffb9f",
    "height": 1,
    "body": {
      "address": "142BDCeSGbXjWKaAnYXbMpZ6sbrSAo3DpZ",
      "star": {
        "ra": "16h 29m 1.0s",
        "dec": "-26° 29' 24.9",
        "story": "466f756e642073746172207573696e672068747470733a2f2f7777772e676f6f676c652e636f6d2f736b792f",
        "storyDecoded": "Found star using https://www.google.com/sky/"
      }
    },
    "time": "1532296234",
    "previousBlockHash": "49cce61ec3e6ae664514d5fa5722d86069cf981318fc303750ce66032d0acff3"
  },
  {
    "hash": "6ef99fc533b9725bf194c18bdf79065d64a971fa41b25f098ff4dff29ee531d0",
    "height": 2,
    "body": {
      "address": "142BDCeSGbXjWKaAnYXbMpZ6sbrSAo3DpZ",
      "star": {
        "ra": "17h 22m 13.1s",
        "dec": "-27° 14' 8.2",
        "story": "466f756e642073746172207573696e672068747470733a2f2f7777772e676f6f676c652e636f6d2f736b792f",
        "storyDecoded": "Found star using https://www.google.com/sky/"
      }
    },
    "time": "1532330848",
    "previousBlockHash": "a59e9e399bc17c2db32a7a87379a8012f2c8e08dd661d7c0a6a4845d4f3ffb9f"
  }
]

Search by hash

GET /stars/hash:[HASH]

Sample request

curl "http://localhost:8000/stars/hash:a59e9e399bc17c2db32a7a87379a8012f2c8e08dd661d7c0a6a4845d4f3ffb9f"

Sample response

{
  "hash": "a59e9e399bc17c2db32a7a87379a8012f2c8e08dd661d7c0a6a4845d4f3ffb9f",
  "height": 1,
  "body": {
    "address": "142BDCeSGbXjWKaAnYXbMpZ6sbrSAo3DpZ",
    "star": {
      "ra": "16h 29m 1.0s",
      "dec": "-26° 29' 24.9",
      "story": "466f756e642073746172207573696e672068747470733a2f2f7777772e676f6f676c652e636f6d2f736b792f",
      "storyDecoded": "Found star using https://www.google.com/sky/"
    }
  },
  "time": "1532296234",
  "previousBlockHash": "49cce61ec3e6ae664514d5fa5722d86069cf981318fc303750ce66032d0acff3"
}

Search by block height

GET /block/[HEIGHT]

Sample request

curl "http://localhost:8000/block/1"
{
  "hash": "a59e9e399bc17c2db32a7a87379a8012f2c8e08dd661d7c0a6a4845d4f3ffb9f",
  "height": 1,
  "body": {
    "address": "142BDCeSGbXjWKaAnYXbMpZ6sbrSAo3DpZ",
    "star": {
      "ra": "16h 29m 1.0s",
      "dec": "-26° 29' 24.9",
      "story": "466f756e642073746172207573696e672068747470733a2f2f7777772e676f6f676c652e636f6d2f736b792f",
      "storyDecoded": "Found star using https://www.google.com/sky/"
    }
  },
  "time": "1532296234",
  "previousBlockHash": "49cce61ec3e6ae664514d5fa5722d86069cf981318fc303750ce66032d0acff3"
}