Function defineMethod

defineMethod<
    InputSchema extends StandardSchemaV1<any, any>,
    OutputSchema extends StandardSchemaV1<any, any>,
>(
    schemas: MethodSchemaConfig<InputSchema, OutputSchema>,
    handler: (
        ...args: InferOutput<InputSchema> extends readonly any[]
            ? InferOutput<InferOutput<InputSchema>>
            : [InferOutput<InputSchema>],
    ) => Promise<InferOutput<OutputSchema>>,
): DefinedMethod<InputSchema, OutputSchema>
Define a single RPC method with schema-first validation. Types are inferred from the schemas — no separate type definition needed.
Type Parameters
- InputSchema extends StandardSchemaV1<any, any>
- OutputSchema extends StandardSchemaV1<any, any>
Parameters
- schemas: MethodSchemaConfig<InputSchema, OutputSchema>
- handler: (
      ...args: InferOutput<InputSchema> extends readonly any[]
          ? InferOutput<InferOutput<InputSchema>>
          : [InferOutput<InputSchema>],
  ) => Promise<InferOutput<OutputSchema>>
Returns DefinedMethod<InputSchema, OutputSchema>
Example
```
const echo = defineMethod(
  { input: z.tuple([z.string()]), output: z.string() },
  async (message) => message
)
```
- Defined in packages/kkrpc/src/validation.ts:282