Toy Hashes & Chained Blocks: MOD Hashes, Previous-Hash Links and Spotting a Tampered Block
This lesson is part of the course
In this lesson
You recompute a toy hash for each of eight blocks from its data and stored previous hash, compare it with the stored hash, check every link to the previous block and find the first block someone edited.
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Lessons in this course
- A Shared Ledger: Balances from a Transaction Log, Running Balances in Order and Double Spends Locked
- Toy Hashes & Chained Blocks: MOD Hashes, Previous-Hash Links and Spotting a Tampered Block Locked
- Merkle Trees: Pairing Hashes Level by Level, the Odd Leaf, the Root and a Proof Path Locked
- Proof-of-Work: Targets, a Given Nonce Table, the First Valid Nonce and Expected Tries Locked
- Difficulty Adjustment: Actual vs Target Block Times over a Window and a Clamped New Difficulty Locked
- Unspent Outputs: Wallet Balances, Spending Whole Outputs, Change and the Implied Fee Locked
- Fee Markets: Fee Rates, Ranking the Waiting Pool, Packing a Block and Waiting Blocks Locked
- Capstone – Issuance & Costs: Halving Rewards, Cumulative Supply, Reward Value vs Energy Cost and a Chart Locked