1
Lesson 1
12 minBitcoin Transactions
Explore how Bitcoin transactions are constructed, signed, broadcast and verified by nodes.
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Intermediate Learning Path
Go deeper into how Bitcoin works
Study transactions, UTXOs, fees, privacy, address types, Lightning and personal-node integration through a structured learning path.
Course progress
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25 lessonsAround 3–4 hoursProgress saved locally
Course curriculum
Intermediate lessons
Follow the suggested sequence or open any topic directly. Completed lessons remain available for review at any time.
Module 1
Transaction mechanics
Follow transactions from outputs and addresses through fees, the mempool and settlement.
0 of 8 complete
2
Lesson 2
12 minUTXOs Explained
Understand Bitcoin's unspent transaction output model and how wallets calculate balances.
3
Lesson 3
12 minBitcoin Address Types
Compare legacy, SegWit and Taproot addresses and understand their compatibility and fee differences.
4
Lesson 4
10 minTransaction Fees
Learn how fee rates, transaction size and mempool demand affect confirmation priority.
5
Lesson 5
10 minThe Mempool
Discover how nodes store unconfirmed transactions and how miners select transactions for blocks.
6
Lesson 6
12 minConfirmations and Finality
Understand block confirmations, chain reorganisations and why transaction confidence increases over time.
7
Lesson 7
16 minWhen Bitcoin Transactions Go Wrong
Diagnose rejected, missing, delayed, dropped or replaced transactions and choose the safest next action.
8
Lesson 8
19 minTransaction Batching and UTXO Consolidation
Compare fee savings with the privacy and operational trade-offs of combining payments or wallet outputs.
Module 2
Wallets and privacy
Build a practical threat model and make deliberate privacy, coin-control and verification decisions.
0 of 6 complete
9
Lesson 9
14 minWallet Privacy
Learn how address reuse, change outputs and transaction history can affect Bitcoin privacy.
10
Lesson 10
12 minCoin Control
Understand how selecting individual UTXOs can improve privacy, fee management and wallet organisation.
11
Lesson 11
16 minWallet Threat Modelling
Choose wallet controls by identifying realistic threats, failure modes and recovery requirements first.
12
Lesson 12
19 minCoinJoin, PayJoin and Chain Analysis
Understand collaborative transactions, common chain-analysis heuristics and the limits of Bitcoin privacy tools.
13
Lesson 13
18 minLight Wallets and Verification Models
Compare hosted backends, SPV, compact block filters and full-node validation across trust, privacy and resource trade-offs.
14
Lesson 14
14 minConnecting a Wallet to Your Node
Learn why connecting a wallet to your own node improves verification, sovereignty and privacy.
Module 3
Network inspection and testing
Understand propagation, inspect public data and practise safely on Bitcoin test networks.
0 of 3 complete
15
Lesson 15
16 minNetwork Propagation and Peer Discovery
Follow how nodes discover peers, exchange inventory and relay transactions and blocks without a central server.
16
Lesson 16
17 minReading a Bitcoin Block Explorer
Inspect transactions and blocks without confusing an explorer's labels with independent verification.
17
Lesson 17
18 minBitcoin Test Networks
Choose between regtest, Signet and testnet4 for safe experiments without putting mainnet funds at risk.
Module 4
Payments and scaling
Use payment requests, understand Lightning and apply Bitcoin in a business context.
0 of 3 complete
18
Lesson 18
17 minBitcoin Payment Requests and QR Codes
Read Bitcoin payment instructions safely, verify amounts and destinations, and understand what a QR code can contain.
19
Lesson 19
14 minThe Lightning Network
Explore how payment channels enable faster and lower-cost Bitcoin transactions beyond the base layer.
20
Lesson 20
18 minAccepting Bitcoin as a Business
Design a practical payment workflow covering settlement, Lightning, verification, refunds, records and operational risk.
Module 5
Custody, trust and continuity
Compare acquisition and exchange risk, then design resilient multisig and inheritance arrangements.
0 of 5 complete
21
Lesson 21
17 minKYC, Peer-to-Peer Buying and Privacy
Compare custodial services, peer-to-peer buying, identity records and the safety trade-offs of each acquisition path.
22
Lesson 22
18 minProof of Reserves and Exchange Risk
Learn what reserve evidence can prove, why liabilities matter and which custodial risks remain after a snapshot.
23
Lesson 23
17 minMultisig and Collaborative Custody
Understand signature thresholds, key separation, recovery plans and the trade-offs of involving another custodian.
24
Lesson 24
19 minBitcoin Inheritance and Recovery Planning
Build a succession plan that separates instructions from secrets and remains testable as wallets and circumstances change.
25
Lesson 25
15 minBitcoin and Artificial Intelligence
Separate practical machine-payment use cases from speculation, and understand the custody and verification risks.
Intermediate assessment
Test your understanding with 25 questions. Score 20/25 or higher to earn your completion badge. Your attempt is saved automatically.