A Shared Ledger: Balances from a Transaction Log, Running Balances in Order and Double Spends
This lesson is part of the course
In this lesson
You turn a log of ten transfers into received, sent and final balances with SUMIFS, then replay the log in order with growing ranges and flag the transfer where Ana spends points she does not have yet.
Buy the course once for $9.99 to unlock every lesson and lab, the final exam and the certificate – lifetime access, no subscription.
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