Super duper simple, naive blockchain proof of concept in Node.

• ECC cryptography for messages!
• SHA256 block signing!
• Simple implementation!
• Arbitrary JSON messages!
• Block size limit! (For the hell of it)

• Networking! – This implementation only generates a blockchain locally.
• Proof-of-... – Anyone in the network (if there was one) can generate blocks at arbitrary speed.
• Minting coins – Could be added by way of a special rule to allow, say, the first message of a block to be a senderless send of given value.

• npm i or yarn to install the single dependency (elliptic)
• Run node make-blockchain.js to create blockchain.txt
• (Go ahead! Modify blockchain.txt at this point, and the next command will crash!)
• Run node verify-blockchain.js to read blockchain.txt and summarize its contents