Function createValidatedGrant

createValidatedGrant(params: GrantPermissionParams): GrantFile
Creates and validates a grant file from permission parameters.
Parameters
- params: GrantPermissionParams
  The permission parameters to create and validate the grant from. Obtain from user input or application configuration.
Returns GrantFile
The validated grant file object ready for storage
Remarks
Combines grant creation with immediate validation to ensure only valid grants are created. Validates schema compliance, grantee address, and operation parameters before returning the grant file.

Throws
When grant parameters are invalid. Check error message for specific validation failures.
Example
```
const grant = createValidatedGrant({
  grantee: '0x742d35Cc6634C0532925a3b844Bc9e7595f0b0Bb',
  operation: 'llm_inference',
  parameters: { model: 'gpt-4', maxTokens: 1000 },
  expiresAt: Date.now() + 86400000 // 24 hours
});
```
- Defined in packages/vana-sdk/src/utils/grants.ts:49