Function isContractVtxoEvent

isContractVtxoEvent(event: ContractEvent): event is ContractVtxoEvent
Gate every wallet-side effect on this: a watch-only event has no contract.
Parameters
- event: ContractEvent
Returns event is ContractVtxoEvent
Example
```
`if (!isContractVtxoEvent(event)) return;` inside `onContractEvent`,
before reading `event.contract` — which does not compile without it.
```
- Defined in packages/ts-sdk/src/contracts/types.ts:571