> For the complete documentation index, see [llms.txt](https://vizo.gitbook.io/vizo-exchange-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://vizo.gitbook.io/vizo-exchange-docs/documentation/technology/integrations.md).

# 11. Technical Specification Key Points

#### **Contract Model Recommendation:** 

Funds escrow contract (cannot be withdrawn arbitrarily) + judgement contract (read-only). Administrator permissions are only used for emergency pause and oracle management. All administrator actions require a timelock (e.g., 24h) and must record the approval chain.

#### **Data Indexing:** 

Use The Graph to establish market and betting indexing services; the front-end queries real-time markets and history via GraphQL.

#### **Event Logs:** 

Define standardized events (MarketCreated, BetPlaced, BetCancelled, MarketClosed, Settled) and document them.

#### **Front-end:** 

React/Next.js + Websocket subscription + Wallet integration (supports WalletConnect/MetaMask).

#### **Operations:** 

On-chain monitoring (Tenderly / Blocknative), oracle node watch, alarm integration such as Slack/PagerDuty


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