Bitcoin Cash Development Meetings 2020

Information will be posted here as it comes available

Bitcoin Cash Difficulty Adjustment Algorithm development meeting #3 Agenda:

1. Welcome - Chair, 2. Introductions: (1 min each) Name, background, current work and interest in the subject, 3. Reason for the meeting:

Follow up of DAA Developer meeting #2, progress on development, implementation and specification, 4. Format for the meeting: - Rules of engagement / Code of conduct, - Suggestions for the Agenda (What do participants want to discuss with regards to the DAA), - Acceptance of the Agenda, 5. Primary Discussion Items: To be decided by meeting participants, 6. Calls to Action, 7. Next meeting, Adjournment.

5. Primary Discussion Items: To be decided by meeting participants: 1. Follow up from the last meetings, 2. "concerns about recent unilateral announcements by ABC", 3 "Sim results from Grasberg", 4. How can we achieve consensus - What is the Process?, 5. What are the practical risks of the algorithms on the table, 6. Marketing side comparing other crypto

Bitcoin Cash Difficulty Adjustment Algorithm development meeting #2 Agenda:

1. Welcome - Chair Opening statement 2. Reason for the meeting 3. Format for the meeting - Rules of engagement. See Work Group Code of Conduct https://github.com/bitcoincashorg/bitcoincash.org/blob/master/workgroups/code-of-conduct.md​ -Acceptance of the Agenda 4. Introductions: (​1 min each) Name, background, current work and interest in the subject. 5. Primary Discussion Items: a. Previous meeting: is there anything participants want to bring forward about the first meeting and its video b.Development: what has been happening between the meeting on July 16th and today's meeting - Freetrader: concerns about recent unilateral announcements by ABC c. Solutions: What are the options on the table and what is known and not known about them - Freetrader: What are the ramifications of drift compensation d. Testing and research: What tests are done and what still needs additional research and testing e. Going forward: What is the path forward from here? 6. Calls to Action: 7. Next meeting? Adjournment

References and links discussed during the meeting:

DAA research and proposal by Jonathan Toomim: https://read.cash/@jtoomim/bch-upgrade-proposal-use-asert-as-the-new-daa-1d875696 ; Zawy's DAA research: https://github.com/zawy12/difficulty-algorithms ; Imaginary Username's research on the effect of a DAA change on ecosystem software: https://bitcoincashresearch.org/t/difficulty-adjustment-algorithm-daa-change-affected-software/120 ; DAA work group link: https://t.me/joinchat/HCYr506_9oNIjmWgXh_kyA

Bitcoin Cash Difficulty Adjustment Algorithm development meeting #1 Agenda:

1. Welcome - Chair Opening statement 2. Reason for the meeting 3. Format for the meeting - Acceptance of the Agenda 4. Rules of engagement - See Work Group Code of Conduct https://github.com/bitcoincashorg/bitcoincash.org/blob/master/workgroups/code-of-conduct.md​ 5. Introductions: (​1 min each) Name, background, current work and interest in the subject. 6. Primary Discussion Items: 6.1- The problem 6.2- Why is a change needed (What needs to change and what needs to remain the same) 6.3 - Possible solutions 6.4- Cost to the ecosystem of doing the change or not doing the change - 6.5 Conclusions 7. Calls to Action: 8. Next meeting? Adjournment
References and links discussed during the meeting:

DAA research and proposal by Jonathan Toomim: https://read.cash/@jtoomim/bch-upgrade-proposal-use-asert-as-the-new-daa-1d875696 ; Zawy's DAA research: https://github.com/zawy12/difficulty-algorithms ; Bonded Mining: Difficulty Adjustment by Miner Commitment paper by George Bissias, David Thibodeau & Brian N. Levine: https://arxiv.org/abs/1907.00302 ; Imaginary Username's research on the effect of a DAA change on ecosystem software: https://bitcoincashresearch.org/t/difficulty-adjustment-algorithm-daa-change-affected-software/120 ; DAA work group link: https://t.me/joinchat/HCYr506_9oNIjmWgXh_kyA

Bitcoin Cash Development video meeting agenda:
1. Avalanche - update (00:02:19) 2. Difficulty Adjustment Algorithm (00:31:23) 3. Multiple Op_Returns (00:50:34) 4. Possible November upgrade items (01:28:34) 5. Bitcoin Cash Specification (01:49:45) 6. Additions to the Agenda (1:51:27) 7. Q&A
References and links discussed during the meeting:

DAA telegram workgroup: https://github.com/bitcoincashorg/bitcoincash.org/blob/master/workgroups/wg-daa/workgroup.md https://bitcoincashresearch.org/t/improve-utility-of-script-calculations-larger-numbers-op-mul/39/2
 

Bitcoin Cash Development video meeting agenda:
1. Upgrade preparations - releases and testnet, 2. IPF Soft-Fork activation status, 3. Items for next upgrades (November 15th and after) 4. Fractional Satoshis, 5 Additional agenda items : pros and cons of using external software - AVA full node

Bitcoin Cash Development video meeting agenda:
1. QUIC and Avalanche - update, 2 . May upgrade preparations, 3. Upgrade Testnet, 4. BCH Specification - update, 5. Additional Items

References and links discussed during the meeting:

Testing Workgroup https://github.com/bitcoincashorg/bitcoincash.org/tree/master/workgroups/wg-testing Bitcoin ABC review.bitcoinabc.org QUIC - MVST: https://github.com/facebookincubator/mvfst Shammah Chancellor's project: https://github.com/cashweb/stamp EC implementation of im_unames paycodes: https://github.com/Electron-Cash/Electron-Cash/tree/jonald-paycode. im_unames reusable proposal addresses: https://github.com/imaginaryusername/Reusable_specs/blob/master/reusable_addresses.md

If you value these meetings please donate to: bitcoincash:qrwyeh8r09rgmpcc6adde6l7u0yp9c7wxcc65qck7j

Bitcoin Cash Development video meeting agenda:

1 - Discussion of final upgrade items: a) Chained transaction limit bump from 25 to 50 (non consensus), b) SigChecks, c) “OP_REVERSEBYTES”, d) Infrastructure Funding Plan, 2 Other upgrade-related items: Testnet and Specifications, 3 Cash Stack Benchmark Tests - Results, 4 Additional Items, 5 Questions from the audience.

References and links discussed during the meeting:

Testing Workgroup https://github.com/bitcoincashorg/bitcoincash.org/tree/master/workgroups/wg-testing , Cash Stack Benchmark Tests - Results (Chris Troutner) a. https://github.com/christroutner/benchmark-bch/tree/master/docs , b. https://github.com/christroutner/benchmark-bch/blob/master/docs/test01-node.md , c. https://github.com/christroutner/benchmark-bch/blob/master/docs/test02-indexer.md , Shortened link to the BCH Stack Exchange proposal. We need as many people as possible to 'commit' to get this to the next stage. https://bch.gg/28r Linux Foundation: https://www.linuxfoundation.org/

SLP Meeting #2 Agenda:

1. V1.0 SLP development update, 2. SLP java indexer introduction, 3. Bitcoin.com wallet burning minting batons and NFTs , 4. Bitcoinj SLP Java library, 5. Postage protocol updates, 6. Q&A

References and links discussed during the meeting:

Guidelines on implementing SLP in wallets: https://github.com/simpleledger/slp-implementation-instructions , SLP Post Office Telegram channel: https://t.me/slpost, SLP Post Office - open source fork: https://github.com/TOKENLAND/simpleledger-post-office-server , slp-cli-wallet: https://github.com/christroutner/bch-cli-wallet , SLP Devs for Hire Telegram Channel: https://t.me/slp_devs_for_hire .

BitcoinCashJ Repo root: https://github.com/pokkst/bitcoincashj , Some of the classes for creating SLP OP_RETURNs.: https://github.com/pokkst/bitcoincashj/blob/slp/core/src/main/java/org/bitcoinj/core/SlpOpReturnOutputSend.java , https://github.com/pokkst/bitcoincashj/blob/slp/core/src/main/java/org/bitcoinj/core/SlpOpReturnOutputGenesis.java , SLP App Kit. For creating SLP wallets easily: https://github.com/pokkst/bitcoincashj/blob/slp/core/src/main/java/org/bitcoinj/kits/SlpAppKit.java

Other relevant links: https://github.com/simpleledger/slp-implementation-instructions/blob/master/README.md , http://github.com/blockparty-sh/cpp_slp_graph_search , https://github.com/simpleledger/Electron-Cash-SLP SLPDB https://github.com/simpleledger/SLPDB , https://developer.bitcoin.com/ Badger wallet: https://github.com/bitcoin-com/badger-mobile SLP Indexer: https://github.com/Bitcoin-com/slp-indexer

Meeting #2 Agenda:

1. BCH Script roadmap, 2. OP_ReverseBytes, 3. Mitra (formerly known as Nimbus), 4. Addition script related items. 5. Audience Q&A

References and links discussed during the meeting:

Benchmarks mentioned as well as the prototype/toy implementation of int128 using boost https://github.com/EyeOfPython/bitcoin-abc-benchin/blob/master/benchmark.ipynb Spec for OP_REVERSEBYTES https://github.com/EyeOfPython/bitcoincash.org/blob/master/spec/op_reversebytes.md Mitra blogpost https://read.cash/@TobiasRuck/why-mises-would-love-mitra-bitcoin-cashs-hidden-superpower-that-even-ethereum-20-doesnt-have-0e6090bb Known quadratic behaviors (the OP_IF case is benchmarked above and doesn‘t seem to be quadratic): https://bitslog.com/2017/04/17/new-quadratic-delays-in-bitcoin-scripts/

Mark Lundeberg - "Quadratic sighash remains in Segwitv0/BCH/BSV digest algorithms".: https://gist.github.com/markblundeberg/c2c88d25d5f34213830e48d459cbfb44

Meeting #1 Agenda:

1. Libsecp256k1 library announcement, 2. May 15th Upgrade - SigChecks + OP_ENDIAN_REVERSE, 3. BCH Specification update, 4. Avalanche discussion/progress update, 5. Additional Items

References and links discussed during the meeting:

OP_REVERSE spec PR: https://github.com/bitcoincashorg/bitcoincash.org/pull/358/files, https://gist.github.com/Mengerian/7ae4c4abbc6f4d1664507c817a51da2f. BCH protocol specification status: https://bitcoinprotocol.cash, Repo at https://github.com/SoftwareVerde/bitcoin-cash-specification, Bitcoin Unlimited's repo clone at https://github.com/BitcoinUnlimited/BitcoinCashSpecification. Https://github.com/christroutner/benchmark-bch/tree/master/docs. Https://reviews.bitcoinabc.org/source/bitcoin-abc/browse/master/src/test/data/script_tests.json

Avalanche spec: https://github.com/tyler-smith/snowglobe/blob/master/spec/snowglobe.md, Invite link for Avalanche working group on Telegram: https://t.me/joinchat/DUeWWk5H-S4Zs5apShtM2g. Https://github.com/gcash/bchd/issues/328

Meeting #18 Agenda:

1. Next Upgrade discussion of potential items - SigChecks + Other items?, 2. BCH specification Update, 3. Avalanche discussion / progress updates,

References and links discussed during the meeting:

https://reviews.bitcoinabc.org/source/bitcoin-abc/browse/master/src/test/data/script_tests.json

Invite link for Avalanche working group on Telegram: https://t.me/joinchat/DUeWWk5H-S4Zs5apShtM2g

Meeting #1 Agenda:

1. Introduction of Panel, 2.Panel discussion of Timeline, 3. Current development, 4. How to get involved

References and links discussed during the meeting:

https://github.com/simpleledger/SimpleToken.cash/commit/332bb4187fedd25cb2d8a7b2d00f274c46d8e3df , JavaScript SDK for working with SLP tokens: https://github.com/Bitcoin-com/slp-sdk/tree/master/examples

Meeting #17 Agenda:

1. Upgrade debrief, 2. Next upgrade preparedness, 3. Discussion of potential upgrade items (SigChecks, Script system) & 4. BCH specification Update
References and links discussed during the meeting:

Documentation for CashScript, which is an SDK for compiling Script programs https://developer.bitcoin.com/cashscript/docs/getting-started

https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2019-September/017306.html

Meeting #16 Agenda:

1. Avalanche discussion / progress updates, 2. Discussion of Upgrade preparedness, 3. Creating a BCH specification / BUIP121, 4. Potential items for the next upgrade: (Allowing more than one OP_RETURN output per transaction, New Difficulty Adjustment Algorithm, Make P2PKH256 outputs standard & 520 byte script limit (affecting P2SH script length in particular))

References and links discussed during the meeting:

November 15th Upgrade Specification: https://github.com/bitcoincashorg/bitcoincash.org/blob/master/spec/2019-11-15-upgrade.md

Bitcoin Verde Telegram: https://t.me/bitcoinverde

From Jason Dreyzehner : Opcode descriptions for opcodes which are common between BCH and BTC: https://github.com/bitauth/bitcoin-ts/blob/master/src/lib/auth/instruction-sets/common/descriptions.ts, Common error messages: https://github.com/bitauth/bitcoin-ts/blob/master/src/lib/auth/instruction-sets/common/errors.ts, BCH only descriptions: https://github.com/bitauth/bitcoin-ts/blob/master/src/lib/auth/instruction-sets/bch/bch-descriptions.ts, BCH only error messages: https://github.com/bitauth/bitcoin-ts/blob/master/src/lib/auth/instruction-sets/bch/bch-errors.ts .Also, I strongly recommend starting from the documentation on bitcoin.org, which is already very good: https://bitcoin.org/en/developer-reference

Meeting #15 Agenda:
1. Discussion of network and mempool behavior( in particular regarding the 25-unconfirmed transaction limit), 2. Double-spend proofs, 3. Next upgrade potential items (Sigops counting improvements, Merklix tree, New opcodes - MUL, Reverse-op-roll, Bigger integers).

References and links discussed during the meeting:

November 15th Upgrade Specification: https://github.com/bitcoincashorg/bitcoincash.org/blob/master/spec/2019-11-15-upgrade.md

Fork of ABC that Peter Tschipper has modified to have the new code that handles long txs chain: https://github.com/ptschip/BitcoinUnlimited/commits/abc_cpfp

Meeting #14 Agenda:

1. Avalanche: development and experimentation, 2. Payment Protocol / BIP 70 discussion, 3. Discussion of Upgrade upcoming 15 nov.

References and links discussed during the meeting:

https://github.com/bitcoincashorg/bitcoincash.org/blob/master/spec/2019-11-15-upgrade.md

https://github.com/bitcoincashorg/bitcoincash.org/blob/master/spec/2019-11-15-schnorrmultisig.md

https://github.com/bitcoincashorg/bitcoincash.org/blob/master/spec/2019-11-15-minimaldata.md

https://github.com/bitauth/bitauth2017/blob/master/bips/0-bitauth.mediawiki

Payment Protocol (BIP70) working group: https://github.com/bitcoincashorg/bitcoincash.org/pull/402, Reusable Address Telegram Group (BitPay):
https://t.me/joinchat/HmRw3RMmuu_V6NvERrHVKg