BitcoinCash/specification
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Additional modifications to BIP/HF layout, added BIP-35.

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Andrew Groot
2021-06-02 10:51:00 -04:00
committed by Josh Green
parent b53f529321
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home.md
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[Bitcoin Keys (Public/Private)](/protocol/blockchain/cryptography/keys) — [Signatures (ECDSA/Schnorr)](/protocol/blockchain/cryptography/signatures) — [Multisignature (M-of-N multisig)](/protocol/blockchain/cryptography/multisignature)
### Network upgrades
**Pre-BCH:** [Bip-9](/protocol/forks/bip-0009) — [Bip-16](/protocol/forks/bip-0016) — [Bip-34](/protocol/forks/bip-0034) — [Bip-37](/protocol/forks/bip-0037) — [Bip-65](/protocol/forks/bip-0065) — [Bip-66](/protocol/forks/bip-0066) — [Bip-68](/protocol/forks/bip-0068) — [Bip-112](/protocol/forks/bip-0112) — [Bip-113](/protocol/forks/bip-0113) — [Bip-133](/protocol/forks/bip-0133) — [Bip-152](/protocol/forks/bip-0152) — [Bip-157](/protocol/forks/bip-0157) — [Bip-158](/protocol/forks/bip-0158) — [Bip-159](/protocol/forks/bip-0159)
**2017:** [BCH-UAHF (BUIP-55)](/protocol/forks/bch-uahf) — [HF-20171113](/protocol/forks/hf-20171113)
#### Pre-BCH
**2018:** [HF-20180515](/protocol/forks/hf-20180515) — [HF-20181115](/protocol/forks/hf-20181115)
| Year (Creation) | BIPs |
|------|-------|
| 2012 | [Bip-16](/protocol/forks/bip-0016) — [Bip-34](/protocol/forks/bip-0034) — [BIP-35](/protocol/forks/bip-0035) — [Bip-37](/protocol/forks/bip-0037) |
| 2014 | [Bip-65](/protocol/forks/bip-0065) |
| 2015 | [Bip-66](/protocol/forks/bip-0066) — [Bip-68](/protocol/forks/bip-0068) — [Bip-112](/protocol/forks/bip-0112) — [Bip-113](/protocol/forks/bip-0113) — [Bip-9](/protocol/forks/bip-0009) |
| 2016 | [Bip-133](/protocol/forks/bip-0133) — [Bip-152](/protocol/forks/bip-0152) |
| 2017 | [Bip-157](/protocol/forks/bip-0157) — [Bip-158](/protocol/forks/bip-0158) — [Bip-159](/protocol/forks/bip-0159) |
**2019:** [HF-20190515](/protocol/forks/hf-20190515) — [HF-20191115](/protocol/forks/hf-20191115)
**2020:** [HF-20200515](/protocol/forks/hf-20200515) — [HF-20201115](/protocol/forks/hf-20201115)
**2021:** [HF-20210515](/protocol/forks/hf-20210515)
#### BCH
| Year (Activation) | Hard Forks |
|------|---------------|
| 2017 | [BCH-UAHF (BUIP-55)](/protocol/forks/bch-uahf) — [HF-20171113](/protocol/forks/hf-20171113) |
| 2018 | [HF-20180515](/protocol/forks/hf-20180515) — [HF-20181115](/protocol/forks/hf-20181115) |
| 2019 | [HF-20190515](/protocol/forks/hf-20190515) — [HF-20191115](/protocol/forks/hf-20191115) |
| 2020 | [HF-20200515](/protocol/forks/hf-20200515) — [HF-20201115](/protocol/forks/hf-20201115) |
| 2021 | [HF-20210515](/protocol/forks/hf-20210515) |
### Network protocol
[Network Messages](/protocol/network/messages) — [Handshake](/protocol/network/node-handshake)
protocol/forks/bch-uahf.md
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# UAHF
# BCH-UAHF: Bitcoin Cash User-Activated Hard Fork
layout: specification
title: UAHF Technical Specification
protocol/forks/bip-0009.md
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# BIP-0009
# BIP-9
BIP: 9
Title: Version bits with timeout and delay
Author: Pieter Wuille <pieter.wuille@gmail.com>
protocol/forks/bip-0016.md
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# BIP-0016
# BIP-16
BIP: 16
Layer: Consensus (soft fork)
protocol/forks/bip-0034.md
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# BIP-0034
# BIP-34
BIP: 34
Layer: Consensus (soft fork)
protocol/forks/bip-0035.md
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# BIP-35
BIP: 35
Layer: Peer Services
Title: mempool message
Author: Jeff Garzik <jgarzik@exmulti.com>
Comments-Summary: No comments yet.
Comments-URI: https://github.com/bitcoin/bips/wiki/Comments:BIP-0035
Status: Final
Type: Standards Track
Created: 2012-08-16
## Abstract
Make a network node's transaction memory pool accessible via a new "mempool" message. Extend the existing "getdata" message behavior to permit accessing the transaction memory pool.
## Motivation
Several use cases make it desireable to expose a network node's transaction memory pool:
1. SPV clients, wishing to obtain zero-confirmation transactions sent or received.
2. Miners, to avoid missing lucrative fees, downloading existing network transactions after a restart.
3. Remote network diagnostics.
## Specification
1. The mempool message is defined as an empty message where pchCommand == "mempool"
2. Upon receipt of a "mempool" message, the node will respond with an "inv" message containing MSG_TX hashes of all the transactions in the node's transaction memory pool, if any.
3. The typical node behavior in response to an "inv" is "getdata". However, the reference Satoshi implementation ignores requests for transaction hashes outside that which is recently relayed. To support "mempool", an implementation must extend its "getdata" message support to querying the memory pool.
4. Feature discovery is enabled by checking two "version" message attributes:
- Protocol version >= 60002
- NODE_NETWORK bit set in nServices
Note that existing implementations drop "inv" messages with a vector size > 50000.
## Backward compatibility
Older clients remain 100% compatible and interoperable after this change.
## Implementation
https://github.com/bitcoin/bitcoin/pull/1641
protocol/forks/bip-0037.md
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# BIP-0037
# BIP-37
BIP: 37
Layer: Peer Services
protocol/forks/bip-0065.md
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# BIP-0065
# BIP-65
BIP: 65
Layer: Consensus (soft fork)
protocol/forks/bip-0066.md
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# BIP-0066
# BIP-66
BIP: 66
Layer: Consensus (soft fork)
protocol/forks/bip-0068.md
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# BIP-0068
# BIP-68
BIP: 68
Layer: Consensus (soft fork)
protocol/forks/bip-0112.md
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BIP-0112
# BIP-112
BIP: 112
Layer: Consensus (soft fork)
protocol/forks/bip-0113.md
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# BIP-0113
# BIP-113
BIP: 113
Layer: Consensus (soft fork)
protocol/forks/bip-0133.md
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# BIP-0133
# BIP-133
BIP: 133
Layer: Peer Services
protocol/forks/bip-0157.md
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# BIP-0157
# BIP-157
BIP: 157
Layer: Peer Services
protocol/forks/bip-0158.md
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# BIP-0158
# BIP-158
BIP: 158
Layer: Peer Services
protocol/forks/bip-0159.md
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# BIP-0159
# BIP-159
BIP: 159
Layer: Peer Services
protocol/network/messages/mempool.md
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Requests that the recipient notify the sender of transactions that are currently in its [mempool](/protocol/blockchain/memory-pool).
Recipients of a `mempool` message MAY respond with a set of transaction hashes currently in their mempool via an [`inv`](/protocol/network/messages/inv) message.
The mempool message was defined in [BIP-35](/protocol/forks/bip-0035).
## Message Format
This message has no contents.