The following TODO items are intended for a 3.0 version of Learning Bitcoin from the Command Line
The following updates involve updates or the creation of new chapters, but their additions are generally bounded and known.
- General Update: Consider replacing testnet with signet
- New Interlude: Creating QR Codes (after 3.3)
- New Subsection: Creating a QR
- New Subsection: Creating a Quick Connect QR
- Revise Section: Understanding the Descriptor (3.5)
- New Content: Descriptor Wallets
- New Content: Complex Descriptors
- Consider: Breaking into Two Sections
- New Interlude: Creating Animated QR Codes (after 7.1)
- New Subsection: Understanding Uniform Resources
- New Subsection: Creating an Animated QR
- New Subsection: Creating an Animated QR of a PSBT
- New Chapter: Using Other Command-Line Tools (between 8+9)
- 9.1: Using seedtool
- 9.2: Using keytool
- 9.3: Using bytewords-cli
- Revise Section: Understanding Timelock Options (11.1)
- Explanation: Better distinguish differences
- Reference: consider chart at in https://prestwi.ch/bitcoin-time-locks/
- New Chapter: Using Miniscript Command-Line Tools (between 13+14)
- 15.1: Using miniscript
- 15.2: Using Bitcoin Dev Kit (BDK)
- 15.3: Planning for the Future
- New Content: Expand the PSBT Libwally Content (17.4) into Two Sections
- 17.4: Signing PSBTs in Libwally
- Explanation: Contains the current info on importing a PSBT, and shows how to sign it
- 17.5: Creating PSBTs in Libwally
- Explanation: Contains the current info on creating a PSBT, and shows how to export it
- 17.4: Signing PSBTs in Libwally
- New Chapter: Talking to Bitcoind with Swift (between 17+18)
- 19.1: Accessing Bitcoind with Swift (existing section)
- 19.2: Using Swift with Bitcoin Lib [Wolf's library]
- 19.3: Using Swift with Libwally [Wolf's shim]
The following updates involve the large-scale work done on Schnorr and Taproot in Bitcoin Core 0.21 and 22. This represents a first cut at how to layout the work, but revision and expansion will likely be needed as everyone's understanding of these new technologies matures.
Chapter X: Expanding Bitcoin Transactions with Schnorr (probably between chapters 6+7)
- New Section X.1: Understanding Schnorr Signatures
- New Subsection: Understanding the Math of Schnorr
- Explanation: Add + subtract for one signature
- New Subsection: Supporting MuSig
- New Subsection: Understanding the Use of Adapter Signatures
- New Subsection: Knowing the Advantages of Schnorr
- Explanation: size, 64 bytes vs 72, better for multisigs
- Explanation: speed, linear, validate a million-sig multisig in 2 minutes
- Explanation: privacy, no difference between MuSig and sig, no detection of Lightning
- Explanation: also better security, non-malleability
- Reference: https://github.com/bitcoin/bips/blob/master/bip-0340.mediawiki
- New Subsection: Understanding the Math of Schnorr
- New Section X.2: Using Schnorr Signatures
- New Subsection: Signing with Schnorr
- New Subsection: Adding a Schnorr Signature
- New Subsection: Reading a Schnorr Signature
- New Subsection: Using Schnorr with Taproot
- Update Chapter 6 (Multisigs) to Integrate with Schnorr
Chapter Y: Improving Bitcoin Scripts with Taproot (probably between chapters 13+14, possibly expanding to two chapters)
- New Section Y.1: Understanding MAST
- New Subsection: Improving Privacy with MAST
- New Subsection: Laying out a Script in MAST
- New Subsection: Knowing the Advantages of MAST
- Explanation: larger scripts
- Explanation: hidden branches of scripts
- Explanation: fungibility
- https://github.com/bitcoin/bips/blob/master/bip-0114.mediawiki
- New Section Y.2: Understanding Taproot
- New Subsection: Integrating MAST with Taproot
- Explanation: Expanding Segwit
- Explanation: Integrating Schnorr Signatures
- New Subsection: KNowing the Advantages of Taproot
- Explanation: even more privacy; scripts and other addresses are indistinbuishable
- Reference: https://github.com/bitcoin/bips/blob/master/bip-0341.mediawiki
- Reference: https://github.com/bitcoin/bips/blob/master/bip-0342.mediawiki
- New Subsection: Integrating MAST with Taproot
- New Subsection Y.3: Creating a Taproot Script
- New Subsection: Defining a Taproot Script
- Explanation: Segwit v1, 32-byte program, not P2SH wrapped, leaf version is 0xc0
- New Codes: OP_CHECKSIGADD and OP_SUCCESS
- Cut Codes: OP_CHECKMULTISIG and OP_CHECKMULTISIGVERIFY
- Reference: https://twitter.com/pwuille/status/1459778730369368067
- New Subsection: Defining a Taproot Script
- New Subsection Y.4: Importing a tr Desciptor
- New Subsection Y.5: Using Taproot in Practice
- New Subsection: Making a Taproot Payment
- New Subsection: Validating a Taproot Script
- Update Chapter 9 to Integrate with Taproot
- Mention Taproot in 9.1 or 9.2
- Add New Section 9.6: Scripting a P2TR (mostly a pointer to Chapter Y)
The following updates could be part of v3.0 or could be further future, depending on interest and funding.
- New Graphics: Animated GIFs for key demos.
- Reference: https://github.com/faressoft/terminalizer
- New Chapter: Talking to Lightningd with C (after chapter 20)
- 22.1: Creating a Lightning Channel with C
- 22.2: Creating a Payment Request with C
- 22.3: Paying an Invoice with C
- 22.4: Closing a Lightning Channel with C
- Alternatives: Consider Swift instead of C, depending on Lightning support
- Reference: https://diyhpl.us/wiki/transcripts/blockstream-webinars/2019-07-31-rusty-russell-getting-started-with-c-lightning/
- Reference: https://twitter.com/roasbeef/status/1389649064753471488_