[API reference](https://evolu.dev/docs/api-reference) › [@evolu/sqlite-wasm](https://evolu.dev/docs/api-reference/sqlite-wasm) › SqliteVfsMethod

```ts
type SqliteVfsMethod =
  | "xOpen"
  | "xDelete"
  | "xRead"
  | "xWrite"
  | "xTruncate"
  | "xSync"
  | "xFileSize";
```

Defined in: [packages/sqlite-wasm/src/Database.ts:574](https://github.com/evoluhq/evolu/blob/bc4578a260dd15d5bbf94b83765ca05984d194cb/packages/sqlite-wasm/src/Database.ts#L574)

A VFS or I/O method that can record a [SqliteVfsFailure](https://evolu.dev/docs/api-reference/sqlite-wasm/interfaces/SqliteVfsFailure).