@lodestar/utils/lib/types.d.ts

Utilities required across multiple lodestar packages

/**
 * Recursively make all properties optional
 * From https://stackoverflow.com/questions/45372227/how-to-implement-typescript-deep-partial-mapped-type-not-breaking-array-properti/49936686#49936686
 */
export type RecursivePartial<T> = {
    [P in keyof T]?: T[P] extends (infer U)[] ? RecursivePartial<U>[] : T[P] extends Readonly<infer U>[] ? Readonly<RecursivePartial<U>>[] : RecursivePartial<T[P]>;
};
/** Type safe wrapper for Number constructor that takes 'any' */
export declare function bnToNum(bn: bigint): number;
export type NonEmptyArray<T> = [T, ...T[]];
/**
 * ArrayToTuple converts an `Array<T>` to `[T, ...T]`
 *
 * eg: `[1, 2, 3]` from type `number[]` to `[number, number, number]`
 */
export type ArrayToTuple<Tuple extends NonEmptyArray<unknown>> = {
    [Index in keyof Tuple]: Tuple[Index];
};
/**
 * Convert optional attributes of an object to required
 */
export type RequiredSelective<T, Keys extends keyof T> = T & {
    [K in Keys]-?: T[K];
};
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