Skip to main content

ensureAsync()

ensureAsync<T>(schema, input): ResultAsync<T, string>

Parses a value against a Kanon schema and returns a Zygos ResultAsync.

Async variant of ensure — designed for ResultAsync chains where validation is one step in an async pipeline.

Type Parameters​

T: T​

The expected output type of the schema.

Parameters​

schema: Schema<T>​

Kanon schema to validate against.

input: unknown​

Value to validate.

Returns: ResultAsync<T, string>​

OkAsync<T> if validation succeeds, ErrAsync<string> otherwise.

Since​

2.1.0

Example​

import { ensureAsync } from "pithos/bridges/ensureAsync";
import { object, string, number } from "pithos/kanon";

safeFetch("/api/user")
  .andThen(res => safeJson(res))
  .andThen(data => ensureAsync(UserSchema, data))
  .map(user => user.name);