types capability.ts

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  import type { JsonSchema } from '@metamask/kernel-utils';
 
export type Capability<Args extends Record<string, unknown>, Return = null> = (
  args: Args,
) => Promise<Return>;
 
export type CapabilitySchema<ArgNames extends string> = {
  description: string;
  args: Record<ArgNames, JsonSchema>;
  returns?: JsonSchema;
};
 
export type ExtractRecordKeys<Rec> =
  Rec extends Record<infer Key, unknown> ? Key : never;
 
export type CapabilitySpec<
  Args extends Record<string, unknown> = Record<string, unknown>,
  Return = void,
> = {
  func: Capability<Args, Return>;
  schema: CapabilitySchema<ExtractRecordKeys<Args>>;
};
 
export type CapabilityRecord<Keys extends string = string> = Record<
  Keys,
  CapabilitySpec<never, unknown>
>;