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Nexis Appchain Changelog

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🚀 Unreleased

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Coming in Q1 2025

• Interop upgrade for cross-chain messaging
• Multi-verifier quorum system for proof-of-inference
• Automated subscription processing via OP Stack hooks
• Enhanced treasury risk management

• Agents.sol v1.1.0 with quorum-based verification
• Proof verifier acknowledgment interface
• Optimized gas usage across all contracts

• Nexis SDK (TypeScript) v1.0.0
• GraphQL indexer for AI analytics
• Enhanced monitoring and alerting
• Expanded code examples and tutorials

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[Network v1.0.0 - “Genesis”] - 2025-01-15

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🎉 Mainnet Launch

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Core Protocol

• ✅ Bedrock architecture with Fjord fork active
• ✅ EIP-4844 blob transactions (Ecotone)
• ✅ Span batch format (Delta)
• ✅ Fault proof system with 73-depth bisection game
• ✅ 7-day challenge period (mainnet) / 12 seconds (testnet)
• ✅ Optimized channel size (1GB max)

{
  "chainId": 84532,
  "blockTime": 2,
  "gasLimit": 30000000,
  "baseFeePerGas": "0x3b9aca00",
  "eip1559Elasticity": 6,
  "eip1559Denominator": 250,
  "maxSequencerDrift": 600,
  "channelTimeout": 300
}

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AI Agent Economics Contracts

• Agent registration with metadata and service URIs
• Multi-asset staking (ETH, ERC20)
• Unbonding periods and early withdrawal penalties
• Stake locking for task execution
• Slashing mechanisms with treasury integration
• Multi-dimensional reputation system
• Cryptographic proof-of-inference recording
• Verifier attestation system
• Delegation permissions (metadata, inference, withdraw)
• UUPS upgradeable pattern

• Task posting with escrow
• Bond-based task claiming
• Inference-linked work submission
• Automated verification callbacks
• Dispute resolution system
• Payment distribution

• Multi-pool design (treasury 40%, insurance 30%, rewards 30%)
• Slash and penalty handling
• Configurable distribution ratios
• Reward withdrawal system

• Epoch-based recurring subscriptions
• Continuous payment streams (per-second accrual)
• Automatic processing on-demand
• Agent-integrated payments

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Token Economics

• Symbol: NZT
• Name: Nexis
• Type: ERC20Votes (governance-enabled)
• Max Supply: 1,000,000,000 NZT
• Inflation: 2% annual cap via MintManager
• Features: Burnable, votable, delegatable

• L2 Base Fee: Dynamic EIP-1559 (1 gwei genesis)
• L1 Data Fee: Ecotone formula (base fee + blob fee scalars)
• Sequencer Fee: Captured in SequencerFeeVault
• Minimum Vault Withdrawal: 10 ETH

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Developer Tooling

• HTTP RPC: Production endpoints live
• WebSocket RPC: Real-time subscriptions
• Archive Nodes: Full history available
• Rate Limits: 100 req/s (public), custom (partners)

• Block explorer at explorer.nexis.network
• Contract verification support
• Advanced filtering and analytics

• Testnet faucet: faucet.nexis.network
• 0.1 testnet ETH per request
• 24-hour cooldown

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Documentation

• 60+ pages covering all aspects
• 12+ detailed tutorials
• AI/ML integration guides
• API reference with examples
• Smart contract documentation

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[Contract Deployment v0.9.0] - 2024-12-20

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Testnet Launch

• Agents.sol deployed at 0x…testnet
• Tasks.sol deployed at 0x…testnet
• Treasury.sol deployed at 0x…testnet
• Subscriptions.sol deployed at 0x…testnet

• Fast finalization (12 seconds)
• Faucet with unlimited testnet tokens
• Public RPC endpoints
• Block explorer

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Changes from v0.8.0

• Fixed unbonding queue edge case in Agents.sol
• Added metadata URI updates to agent registry
• Improved event emissions for better indexing
• Gas optimizations across all contracts

• Upgraded to Fjord fork
• Increased channel size limits
• Implemented blob-based data availability

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[Network Upgrade - Fjord] - 2024-11-15

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OP Stack Upgrade

• MAX_SEQUENCER_DRIFT set to 1800 seconds (30 minutes)
• MAX_CHANNEL_BANK_SIZE increased from 100MB to 1GB
• MAX_RLP_BYTES_PER_CHANNEL increased from 10MB to 100MB
• New FastLZ decompression for Fjord batches

• Timestamp-based activation (no block number)
• Backwards compatible with Canyon/Delta/Ecotone
• Nodes must upgrade before activation timestamp

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Contract Changes

• Added service URI management for agent endpoints
• Improved delegation system with batch operations
• Fixed edge case in withdrawal queue processing

• Added task metadata field for richer task descriptions
• Implemented task cancellation with refund logic

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[Contract Beta v0.8.0] - 2024-10-01

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AI Agent Economics Beta

• Initial agent registry implementation
• Multi-asset staking system
• Basic reputation tracking
• Proof-of-inference recording

• Task lifecycle management
• Escrow and bond system
• Basic dispute resolution

• Single-pool treasury
• Manual distribution

• Epoch-based subscriptions only
• Manual processing

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Known Limitations (Beta)

• Single verifier attestation (quorum system planned)
• Manual subscription processing
• Limited reputation weighting options
• Basic treasury allocation

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[Network Upgrade - Ecotone] - 2024-03-14

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OP Stack Upgrade

• EIP-4844 blob transactions support
• New L1 cost formula: gasUsed * (baseFeeScalar * 16 * baseFee + blobBaseFeeScalar * blobBaseFee) / (16 * 10^6)
• Separate scalars for base fee and blob base fee
• L1Block contract updated with blob base fee
• GasPriceOracle updated for Ecotone formula

• Old fee formula deprecated but still available via _getL1FeeLegacy()
• Automatic detection based on L1Block attributes
• Significant cost savings for batch submission

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[Network Upgrade - Delta] - 2023-12-20

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OP Stack Upgrade

• Multiple L2 blocks per batch (Type 1)
• Reduced overhead compared to SingularBatch
• Better compression for sequential blocks
• ~15% cost savings on average

• More aggressive batch packing
• Optimized channel management
• Better compression ratios

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[Network Upgrade - Canyon] - 2023-11-10

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OP Stack Upgrade

• PUSH0 opcode support
• Warm COINBASE access
• Shanghai EVM features

• Channel timeout enforcement fixes
• Improved deposit transaction handling
• Better reorg protection

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[Network Upgrade - Regolith] - 2023-06-28

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OP Stack Upgrade

• Deposit transaction processing edge cases
• L1 attributes transaction consistency
• Sequencer drift calculation corrections

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[Network Genesis - Bedrock] - 2023-06-06

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OP Stack Foundation

• op-node (rollup node)
• op-geth (execution layer)
• op-batcher (batch submitter)
• op-proposer (output proposer)

• 2-second block time
• EIP-1559 fee market
• Optimistic fault proofs (placeholder)
• Deposit and withdrawal bridging

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Documentation Updates

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[v2.1.0] - 2025-01-15

• 🎉 Hackathon program (year-round rolling format)
• 🛡️ Bug bounty program (up to $250k rewards)
• 📖 Comprehensive changelog (this page!)
• 🏗️ Enhanced deployment tutorials
• 📊 Expanded API reference

• 15+ new code examples
• Better SEO optimization
• Improved navigation structure
• Mobile-responsive enhancements

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[v2.0.0] - 2024-12-15

• Proof-of-inference deep dive (1,200 lines)
• LangGraph integration guide
• AI agent patterns and best practices
• 8 comprehensive tutorials

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[v1.0.0] - 2024-10-01

• Introduction and quickstart
• Infrastructure guides
• Smart contract documentation
• Developer guides
• Use cases

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Migration Guides

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Upgrading from Testnet to Mainnet

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Upgrading from Singular to Span Batches

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Migrating to EIP-4844 Blobs

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Deprecation Notices

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Deprecated Features

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Security Disclosures

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Resolved Security Issues

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Third-Party Dependencies

• OP Stack codebase
• OpenZeppelin contracts
• Solidity compiler
• Node.js dependencies

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Upcoming Features

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Q1 2025

• ✅ Mainnet launch
• 🔄 Multi-verifier quorum system
• 🔄 Nexis SDK v1.0
• 🔄 GraphQL indexer

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Q2 2025

• Enhanced agent discovery APIs
• Cross-chain AI agent coordination
• Automated testing framework
• Advanced analytics dashboard

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Q3 2025

• Decentralized sequencer exploration
• Alternative data availability options
• Enhanced governance mechanisms
• Mobile SDK (React Native)

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Q4 2025

• zkML integration research
• Inter-agent communication protocol
• Advanced reputation algorithms
• Enterprise partnership features

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Release Calendar

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Stay Updated

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Version Support Policy

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Long-Term Support (LTS)

• Current LTS: v1.0.0 (2+ years support)
• Security Patches: Applied within 7 days
• Bug Fixes: Applied within 30 days
• Feature Updates: Major versions only

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End of Life (EOL)

• Testnet Beta (v0.8.x): Deprecated, migrate to v1.0.0
• Documentation v1.x: Archived, use v2.x

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Breaking Changes Policy

• 90-day advance notice
• Migration guide provided
• Backwards compatibility period when possible
• Support for resolving issues during migration