elclandestin0/private-blockchain

Hello and welcome to my private blockchain API! It is done with Node.js powered by the ExpressJS framework.

To begin, clone the project and navigate to private-blockchain via your favourite terminal application, and hit npm install to download all the dependencies in package.json.

Next, hit the command node .\simpleChain.js (on Windows) or node ./simpleChain.js (on Mac) to begin listening on port 8000 and then fire up CURL or Postman. There are two API endpoints here:

• GET Block Endpoint: localhost:8000/block/:blockNumber is the GET endpoint to return the corresponding block number
Example: localhost:8000/block/1 returns:

{
"hash": "53ec3a61a89175a60f0a4fe603a29077b826c88f4ad144caf395633e8f986fcd",
"height": 1,
"body": "Test Block - 1",
"time": "1539697254",
"previousBlockHash": "028a38089b871f8742f635bf93f926eff59e20a6f897cb38a81f96d60f985e00"
 }

• POST Block Endpoint: localhost:8000/block/:blockContent is the POST endpoint to add a block with the `blockContent` acting as the data to be added within the block. If the `blockContent` string is empty, then no block is added.
Example: localhost:8000/block/test string returns:

{
"hash": "32986314b26b589e164f6c057c822ae43b3369d0e10186078c94af216daffa7e",
"height": 19,
"body": "test string",
"time": "1539725135",
"previousBlockHash": "706ed4ee28d41418187d256c506c1d8c0815ac72007c5f409921138c95e2706e"
}

• POST Block Endpoint (payload): localhost:8000/block/ is the POST endpoint to add a block with the `body` acting as the data to be added within the block. If the `body` variable is empty, then no block is added.
Example: localhost:8000/block/ returns:

{
"hash": "32986314b26b589e164f6c057c822ae43b3369d0e10186078c94af216daffa7e",
"height": 19,
"body": "test string",
"time": "1539725135",
"previousBlockHash": "706ed4ee28d41418187d256c506c1d8c0815ac72007c5f409921138c95e2706e"
}

Let me know if you have any questions!