harb/docs/ARCHITECTURE.md

ARCHITECTURE.md — System Map

Compressed overview for AI agents. Read this first, drill into source for details.

Contract Architecture

Kraiken.sol (ERC-20 token)
├── liquidityManager: address (set once, immutable after)
│   └── LiquidityManager.sol (ThreePositionStrategy)
│       ├── optimizer: Optimizer (private immutable ref)
│       ├── pool: IUniswapV3Pool
│       ├── kraiken: Kraiken
│       └── Positions: Floor, Anchor, Discovery
├── stakingPool: address
│   └── Stake.sol
│       ├── Staking positions with tax rates
│       ├── Snatch mechanics (competitive staking)
│       └── getPercentageStaked(), getAverageTaxRate()
└── feeDestination: address (protocol revenue — both WETH and KRK fees go HERE, not back to holders)

Optimizer.sol (UUPS Upgradeable Proxy)
├── Reads: stake.getPercentageStaked(), stake.getAverageTaxRate()
├── Computes: sentiment → 4 liquidity params
├── Versions: Optimizer, OptimizerV2, OptimizerV3, OptimizerV3Push3
└── Admin: single address, set at initialize()

Key Relationships

• Kraiken → LiquidityManager: set once via setLiquidityManager(), reverts if already set
• LiquidityManager → Optimizer: private immutable — baked into constructor, never changes
• LiquidityManager → Kraiken: exclusive minting/burning rights
• Optimizer → Stake: reads sentiment data (% staked, avg tax rate)
• Optimizer upgrades: UUPS proxy, admin-only _authorizeUpgrade()
• feeDestination receives both WETH and KRK fees: during recenter(), Uniswap V3 fee collection produces both tokens. WETH fees AND KRK fees are forwarded to feeDestination (see LiquidityManager._scrapePositions()).
• feeDestination is a conditional-lock (not set-once): setFeeDestination() (deployer-only) allows repeated changes while the destination is an EOA, enabling staged deployment and testing. The moment a contract address is set, feeDestinationLocked is set to true and no further changes are allowed. A CREATE2 guard also blocks re-assignment if the current destination has since acquired bytecode. This differs from Kraiken's liquidityManager/stakingPool which are strictly set-once.
• feeDestination KRK excluded from outstanding supply: _getOutstandingSupply() subtracts kraiken.balanceOf(feeDestination) before computing scarcity, because protocol-held KRK cannot be sold into the floor and should not inflate the supply count.
• Staking pool KRK excluded from outstanding supply: _getOutstandingSupply() also subtracts kraiken.balanceOf(stakingPoolAddr), because staked KRK is locked and similarly cannot be sold into the floor.

Three-Position Strategy

All managed by LiquidityManager via ThreePositionStrategy abstract:

Position	Purpose	Behavior
Floor	Safety net	Deep liquidity at VWAP-adjusted prices
Anchor	Price discovery	Near current price, 1-100% width
Discovery	Fee capture	Borders anchor, ~3x price range (11000 tick spacing)

Recenter = atomic repositioning of all three positions. Triggered by anyone, automated by txnBot.

Optimizer Parameters

getLiquidityParams() returns 4 values:

1. capitalInefficiency (0 to 1e18) — capital buffer level
2. anchorShare (0 to 1e18) — % allocated to anchor position
3. anchorWidth (ticks) — width of anchor position
4. discoveryDepth (0 to 1e18) — depth of discovery position

Sentiment calculation: sentiment = f(averageTaxRate, percentageStaked)

• High sentiment (bull) → wider discovery, more fee revenue for protocol treasury
• Holder value comes from asymmetric slippage (structural ETH accumulation), NOT from fee reinvestment
• Low sentiment (bear) → tight around floor, maximum protection

Stack

On-chain

• Solidity, Foundry toolchain
• Uniswap V3 for liquidity positions
• OpenZeppelin for UUPS proxy, Initializable
• Base L2 (deployment target)

Indexer

• Ponder (services/ponder/) — indexes on-chain events
• Schema: services/ponder/ponder.schema.ts
• Stats table with 168-slot ring buffer (7d × 24h × 4 segments)
• Ring buffer segments: [ethReserve, minted, burned, tax] (slot 3 being changed to holderCount)
• GraphQL API at port 42069

Landing Page

• Vue 3 + Vite (landing/)
• @wagmi/vue for wallet connection (WalletButton, WalletCard)
• @tanstack/vue-query — required peer dep for @wagmi/vue; provides TanStack Query context for Wagmi's reactive hooks
• @harb/web3 shared composables (useAccount, useConnect, useDisconnect, useTokenBalance)
• Three variants: HomeView (default), HomeViewOffensive (degens), HomeViewMixed
• Docs section: HowItWorks, Tokenomics, Staking, LiquidityManagement, AIAgent, FAQ
• LiveStats component polls Ponder GraphQL every 30s

Staking Web App

• Vue 3 (web-app/)
• Password-protected (multiple passwords in LoginView.vue)
• ProtocolStatsCard shows real-time protocol metrics

Infrastructure

• Docker Compose on 8GB VPS
• Woodpecker CI at ci.niovi.voyage
• Codeberg repo: johba/harb (private)
• Container registry: registry.niovi.voyage

Directory Map

harb/
├── onchain/           # Solidity contracts + Foundry
│   ├── src/           # Contract source
│   ├── test/          # Forge tests
│   └── foundry.toml   # via_ir = true required
├── services/
│   ├── ponder/        # Indexer service
│   │   ├── ponder.schema.ts
│   │   ├── src/
│   │   │   ├── helpers/stats.ts  # Ring buffer logic
│   │   │   ├── lm.ts             # LiquidityManager indexing
│   │   │   └── stake.ts          # Stake indexing
│   └── txnBot/        # Automation bot: calls recenter() and payTax() on profitable opportunities
├── landing/           # Landing page (Vue 3)
│   ├── src/
│   │   ├── components/  # LiveStats, KFooter, WalletCard, etc.
│   │   ├── views/       # HomeView variants, docs pages
│   │   └── router/
├── web-app/           # Staking app (Vue 3)
│   ├── src/
│   │   ├── components/  # ProtocolStatsCard, etc.
│   │   └── views/       # LoginView, StakeView, etc.
├── kraiken-lib/       # Shared TypeScript helpers (bigint math, ABIs, encoding) for frontend and indexer
│   └── src/           # abis, format, ids, position, snatch, staking, subgraph, taxRates, version
├── containers/        # Docker configs, entrypoints
├── docs/              # This file, PRODUCT-TRUTH.md
└── .woodpecker/       # CI pipeline configs