blockStructure.js

{ // Block
    "index": 0, // (first block: 0)
    "previousHash": "0", // (hash of previous block, first block is 0) (64 bytes)
    "timestamp": 1465154705, // number of seconds since January 1, 1970
    "nonce": 0, // nonce used to identify the proof-of-work step.
    "transactions": [ // list of transactions inside the block
        { // transaction 0
            "id": "63ec3ac02f...8d5ebc6dba", // random id (64 bytes)
            "hash": "563b8aa350...3eecfbd26b", // hash taken from the contents of the transaction: sha256 (id + data) (64 bytes)
            "type": "regular", // transaction type (regular, fee, reward)
            "data": {
                "inputs": [], // list of input transactions
                "outputs": [] // list of output transactions
            }
        }
    ],
    "hash": "c4e0b8df46...199754d1ed" // hash taken from the contents of the block: sha256 (index + previousHash + timestamp + nonce + transactions) (64 bytes)
}