import { TaskEither } from 'fp-ts/lib/TaskEither.js';
import z from 'zod';
import * as O from 'fp-ts/lib/Option.js';
import { Field } from 'o1js';
/**
 * Converts a promise that may resolve into an empty value into
 * a TaskEither object that fails with a message if the promise resolves into an empty value
 * or is rejected, or throws an exception.
 */
export declare function fromFailablePromise<T>(p: () => Promise<T | undefined>, msg?: string): TaskEither<string, T>;
/**
 * Discards the task's return value.
 */
export declare function dropResult<E, T>(t: TaskEither<E, T>): TaskEither<E, void>;
/**
 * Lifts zod parsing results into the TaskEither monad.
 */
export declare function liftZodParseResult<I, O>(r: z.SafeParseReturnType<I, O>): TaskEither<string, O>;
/**
 * Having found a kv pair in a record by its key it applies given function on the value
 * and returns the results.
 */
export declare function getParam<T>(onSome: (param: string) => TaskEither<string, T>): (key: string, params: {
    [key: string]: string;
}) => TaskEither<string, T>;
/**
 * Safely construct a value from string.
 */
export declare function safeFromString<T>(ctor: (s: string) => T): (s: string) => TaskEither<string, T>;
/**
 * Safely retrieve a number from a record.
 */
export declare function safeGetNumberParam(key: string, params: {
    [key: string]: string;
}): TaskEither<string, number>;
/**
 * Safely retrieve a o1js Field value from a record.
 */
export declare function safeGetFieldParam(key: string, params: {
    [key: string]: string;
}): TaskEither<string, Field>;
/**
 * Converts a promise that may resolve into an empty value into a TaskEither
 * object that fails with a message if the promise resolves into an empty value
 * or is rejected, or throws an exception.
 */
export declare function fromFailableIO<A>(f: () => A | undefined, msg?: string): TaskEither<string, A>;
/**
 * Converts a TaskEither to a Promise treating its left value as an promise rejection argument.
 * and its right value as a promise resolution argument.
 */
export declare const launchTE: <T>(t: TaskEither<string, T>) => Promise<T>;
/**
 * Given an assertion and an error stop the task execution when the condition is false.
 * All that within TaskEither monad.
 */
export declare const guard: (cond: boolean, msg: string) => TaskEither<string, void>;
/**
 * Given an assertion and error it will give function that either
 * stops the execution with the error on failed assertion or acts as identity function.
 * All that within TaskEither monad.
 */
export declare function guardPassthrough<E>(cond: boolean, err: E): <T>(ret: T) => TaskEither<E, T>;
/**
 * Find the first element in the array that satisfies the given predicate.
 * @param f A predicate, that can be a failible async action.
 * @param arr An array to search.
 * @returns A failible async action that returns the first element in the array
 *          that satisfies the given predicate.
 */
export declare const findM: <T>(f: (x: T) => TaskEither<string, boolean>) => (arr: T[]) => TaskEither<string, O.Option<T>>;