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Test Pull Request #6

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Test Pull Request #6

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b7a41df
my first alteration
vbalasu Sep 19, 2021
babff5f
Implemented poem blockchain
vbalasu Sep 19, 2021
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2 changes: 1 addition & 1 deletion README.md
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
# Bitcoin Whitepaper Exercises
# Bitcoin Whitepaper Exercises - This is Vijay's version

In these exercises, you will learn about blockchains from the perspective of the [original Bitcoin Whitepaper](https://bitcoin.org/en/bitcoin-paper).

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26 changes: 24 additions & 2 deletions hashing/hashing.js
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Expand Up @@ -28,8 +28,29 @@ Blockchain.blocks.push({
});

// TODO: insert each line into blockchain
// for (let line of poem) {
// }
for (let line of poem) {
createBlock(line)
}

// Create function createBlock
// `index`
// `prevHash`
// `data`
// `timestamp`
// `hash`

function createBlock(_data) {
let block = {
index: Blockchain.blocks.length,
prevHash: Blockchain.blocks[Blockchain.blocks.length - 1].hash,
data: _data,
timestamp: Date.now()
}
block.hash = blockHash(block)
Blockchain.blocks.push(block)
console.log(block)
return block
}

// console.log(`Blockchain is valid: ${verifyChain(Blockchain)}`);

Expand All @@ -39,5 +60,6 @@ Blockchain.blocks.push({
function blockHash(bl) {
return crypto.createHash("sha256").update(
// TODO: use block data to calculate hash
`${bl.index};${bl.prevHash};${bl.data};${bl.timestamp};`
).digest("hex");
}