24-changelogs

Changelogs

Community Layer — Fork history and specification evolution

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Definition

Changelogs document the evolution of specifications and implementations over time. In blockchain systems, they particularly track fork history—the sequence of protocol upgrades.

Role in the Framework

EIPs/RFCs ← propose changes
    ↓
Specification updated (prose + executable)
    ↓
Changelogs ← document the evolution
    ↓
├── What changed
├── Why it changed (EIP references)
├── When it activates (fork parameters)
└── Migration guidance

Specification Changelog

# Protocol Specification Changelog
 
## v2.4.0 — Prague (Upcoming)
 
**Activation**: TBD
 
### Added
- SPEC-EOF-1.x: EVM Object Format (EIP-7692)
- SPEC-VERKLE-2.x: Verkle tree state (EIP-6800)
 
### Changed  
- SPEC-GAS-4.2.3: SLOAD cost adjusted for Verkle
 
### EIPs Included
- EIP-7692: EOF
- EIP-6800: Verkle Trees
- EIP-XXXX: ...
 
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## v2.3.0 — Cancun (Active)
 
**Activation**: 
- Mainnet: Block 19426587 (2024-03-13)
- Goerli: Block 10388176
 
### Added
- SPEC-BLOB-5.x: Blob transactions (EIP-4844)
- SPEC-MCOPY-6.x: Memory copy opcode (EIP-5656)
 
### Changed
- SPEC-SELF-7.1: SELFDESTRUCT behavior (EIP-6780)
 
### EIPs Included
- EIP-4844: Proto-Danksharding
- EIP-5656: MCOPY
- EIP-6780: SELFDESTRUCT changes

Fork History

# Ethereum Fork History
 
| Fork | Block/Time | Spec Version | Key Changes |
|------|------------|--------------|-------------|
| Frontier | 0 | v1.0 | Genesis |
| Homestead | 1150000 | v1.1 | DELEGATECALL |
| DAO Fork | 1920000 | v1.1.1 | State intervention |
| ... | ... | ... | ... |
| London | 12965000 | v2.0 | EIP-1559 |
| Paris (Merge) | TTD | v2.1 | Proof of Stake |
| Shanghai | 1681338455 | v2.2 | Withdrawals |
| Cancun | 1710338135 | v2.3 | Blobs |
| Prague | TBD | v2.4 | EOF, Verkle |

Implementation Changelog

# Geth Changelog
 
## v1.14.0 (2024-04-XX)
 
### Specification Compliance
- Implements Protocol Spec v2.4.0 (Prague)
- All Prague fixtures passing
 
### Changes
- feat: EOF implementation per EIP-7692
- feat: Verkle tree support per EIP-6800
- fix: Gas calculation for SPEC-GAS-4.2.3
 
### Spec References
- SPEC-EOF-1.1: Container validation (#29001)
- SPEC-VERKLE-2.3: State proof generation (#29156)

Best Practices

• Link changelog entries to EIPs and spec sections
• Include activation parameters for each fork
• Document migration requirements
• Track both spec and implementation changelogs
• Provide version compatibility matrix