Integrity Model

json-record uses a simple hashing model to detect tampering.

Block structure

• payloadHash = SHA-256(payload)
• prevHash = previous block's blockHash (or null for the first block)
• blockHash = SHA-256(index + timestamp + payloadHash + prevHash)

Block validity

• payloadHash must match the payload
• blockHash must match the block contents

Chain validity

• every block must be valid
• prevHash must match the previous blockHash
• indexes must increase by 1

GitHub · npm