Mastering Bitcoin

Bitcoin Fundamentals

01The Architecture of Bitcoin 02The Double-Spend Problem 03Custodial vs. Noncustodial Wallets 04Wallets, Keys, and Transactions Problem set0/10 Practice∞

01Wallets, Transactions, and Miners 02Inputs, Outputs, and the UTXO Model 03Transaction Construction and Broadcast 04Proof-of-Work Mining Problem set0/10 Practice∞

01Bitcoin Core and Full Nodes 02Compiling Bitcoin Core from Source 03Bitcoin Core Node Configuration 04Transaction Tracing with bitcoin-cli 05Programming Bitcoin Core via JSON-RPC Problem set0/10 Practice∞

Keys, Wallets & Transactions

01Elliptic Curve Cryptography in Bitcoin 02P2PK to P2PKH: Hashing the Public Key 03Base58Check and Compressed Public Keys 04P2SH and the 80-Bit Collision Threat 05Bech32m and the bc1 Address Format 06Bitcoin Key Formats and Vanity Addresses Problem set0/10 Practice∞

01Deterministic Wallets and Seed Phrases 02HD Wallets and the Tweak Identity 03Seed Phrases and Wallet Recovery Schemes 04Beyond the Seed: Descriptors & Wallet State 05BIP39: From Entropy to Seed Phrase 06BIP-32 Hierarchical Deterministic Wallets 07BIP44 and the Gap Limit Problem set0/10 Practice∞

01Transaction Format and Backward Compatibility 02Outpoints, UTXOs, and Double-Spend Prevention 03The Sequence Field 04Dust, OP_RETURN, and the UTXO Set 05Transaction Malleability and SegWit 06Lock Time, Coinbase, and Transaction Weight Problem set0/10 Practice∞

Advanced Transactions

01Bitcoin Script and Stack-Based Validation 02P2PKH and Bare Multisig Execution 03Pay-to-Script-Hash (P2SH)04OP_RETURN and the UTXO Set 05Bitcoin Timelocks: CLTV and CSV 06Branching Logic in Bitcoin Script Problem set0/10 Practice∞

01SegWit: P2WPKH, P2WSH, and P2SH Nesting 02MAST: Merklized Script Trees 03Taproot and Scriptless Multisig Problem set0/10 Practice∞

01SIGHASH Flags 02Schnorr Signatures and BIP340 03Schnorr Multisig and Threshold Signing 04ECDSA, Nonces, and Sighash Problem set0/10 Practice∞

01Bitcoin Transaction Fees 02Replace By Fee 03CPFP and Package Relay 04Transaction Pinning and CPFP Carve Out 05Fee Sniping and nLockTime Problem set0/10 Practice∞

The Network & the Blockchain

01Bitcoin's Flat P2P Network Topology 02Compact Block Relay and BIP 152 03How Bitcoin Nodes Bootstrap and Sync 04SPV and Lightweight Clients 05BIP37 Bloom Filters 06BIP158 Compact Block Filters 07Mempool, Orphan Pool, and Tor Problem set0/10 Practice∞

01Block Depth and Chain Immutability 02Inside a Bitcoin Block 03Merkle Trees and Inclusion Proofs 04Bitcoin's Three Test Networks Problem set0/10 Practice∞

01Bitcoin's 21 Million Cap 02Emergent Consensus in Bitcoin 03The Coinbase Transaction and Block Header 04Proof of Work, Difficulty, and Block Time 05Bitcoin Consensus: Validation and Forks 06Mining Pools and 51% Attacks 07Hard Forks, Soft Forks, and Consensus Problem set0/10 Practice∞

Security & Second Layers

01Bitcoin as Cash: Keys, Possession, No Recourse 02The Blockchain as Root of Trust 03Cold Storage and Hardware Signing 04Bitcoin Loss, Multisig & Inheritance Problem set0/10 Practice∞

01Bitcoin's Guarantees as Building Blocks 02Colored Coins on Bitcoin 03RGB vs Taproot Assets 04Bitcoin Payment Channels 05Timelocks and Spillman Channels 06Revocable Commitments in Lightning 07Hash Time Lock Contracts (HTLCs)08Sphinx Onion Routing on Lightning Problem set0/10 Practice∞

Outpoints, UTXOs, and Double-Spend Prevention

Why does pasting a serialized txid into `bitcoin-cli` always fail — and what does the UTXO database actually enforce that miners don't?

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