71 lines
3.7 KiB
Markdown
71 lines
3.7 KiB
Markdown
<!-- last-reviewed: 76d452191cb91ff5ff6d518c675281889164d1d5 -->
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# Web App - Agent Guide
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Vue 3 + TypeScript staking interface for KRAIKEN, enabling users to stake tokens, manage positions, and interact with Harberger-tax mechanics.
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## Technology Snapshot
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- Vue 3 (Composition API) with TypeScript and Vite toolchain
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- Wagmi/Viem for wallet connection and blockchain interaction
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- Vue Router for navigation
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- Axios for GraphQL queries to Ponder indexer
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- Sass-based component styling
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## Architecture
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### Chain Configuration
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`src/services/chainConfig.ts` centralizes endpoint resolution. All composables accept `chainId` as a parameter and resolve endpoints via `chainConfigService.getEndpoint(chainId, type)`. Supported chains: 31337 (Anvil), 84532 (Base Sepolia), 8453 (Base Mainnet).
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### Wagmi Integration
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`src/wagmi.ts` manages wallet connection. Wagmi is the source of truth for which chain the wallet is on. Composables don't import wallet state directly — they accept `chainId` for testability.
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### Key Composables
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- `useWallet()` — Wallet connection, balance, account state
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- `usePositions(chainId)` — Loads staking positions from Ponder GraphQL
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- `useStatCollection(chainId)` — Protocol-wide statistics
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- `useSnatchSelection(demo, taxRateIndex, chainId)` — Calculates snatchable positions
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- `useStake()` — Executes staking transactions
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- `useAdjustTaxRate()` — Tax rate adjustment
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- `useUnstake()` — Position exit transactions
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### Key Components
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- `StakeView.vue` — Main staking dashboard (route: `/dashboard`)
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- `StakeHolder.vue` — Staking form with accessibility-focused UI
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- `ConnectWallet.vue` — Wallet connection modal
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- `ChartComplete.vue` — Position visualization
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- `CollapseActive.vue` — Expandable position card with actions
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## viem v2 Contract Call Patterns
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- **`slot0()` returns an array, not a record.** `tick` is at index 1: `slot0Response[1]`. Do not access `slot0Response.tick` — that was viem v1 behaviour. `CheatsView.vue` handles both formats for backward compat.
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- When adding new contract reads, check whether viem v2 returns an array or named tuple before indexing into the result.
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## Development Workflow
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- Boot full stack: `./scripts/dev.sh start` (see root AGENTS.md)
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- Targeted: `npm run dev` (assumes Ponder/Anvil already running)
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- Build: `npm run build`
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- E2E tests: `npm run test:e2e` from repo root (Playwright)
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## Testing
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- E2E tests in `tests/e2e/` (repo root) cover complete user journeys
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- Uses mocked wallet provider with Anvil accounts
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- Relies on semantic HTML and ARIA attributes for selectors
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- StakeHolder test hooks: `page.getByRole('slider', { name: 'Token Amount' })`, `page.getByLabel('Tax')`
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## Analytics
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The web app uses `@harb/analytics` (self-hosted Umami wrapper) for funnel event tracking. `initAnalytics(VITE_UMAMI_URL, VITE_UMAMI_WEBSITE_ID)` is called in `main.ts`. Tracked events:
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| Event | Where | Helper |
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|-------|-------|--------|
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| `wallet_connect` | `useWallet.ts` — on first address set | `trackWalletConnect()` |
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| `swap_initiated` | `useSwapKrk.ts` — before buy/sell tx | `trackSwapInitiated('buy'\|'sell')` |
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| `stake_created` | `useStake.ts` — after PositionCreated event | `trackStakeCreated()` |
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All calls are silent no-ops if Umami is unavailable. Env vars: `VITE_UMAMI_URL`, `VITE_UMAMI_WEBSITE_ID`.
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## Quality Guidelines
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- Composables accept `chainId` parameter instead of importing wallet state directly
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- Each composable maintains its own `watchChainId()` listener for independence
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- Always expose `xxxError` and `loading` refs for UI feedback
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- Use strongly typed interfaces for Position, StatsRecord, etc.
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- Use semantic HTML, ARIA attributes, and keyboard navigation
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- Clear watchers and retry timers in `onUnmounted()`
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