import { CashuWallet } from '@cashu/cashu-ts';
import type { Proof, Token, MintKeys } from '@cashu/cashu-ts';
import type { Mint } from '../db/models/types.js';
/**
 * returns a subset of tokens, so that not all tokens are sent to mint for smaller amounts.
 * @param amount
 * @param tokens
 * @returns
 */
export declare const getTokensToSend: (amount: number, tokens: Array<Proof>) => Proof[];
export declare const getLockedTokens: (proofs: Proof[]) => Proof[];
export declare const getKeysForUnit: (keys: MintKeys[], unit?: string) => MintKeys | undefined;
export declare const getKeysForKeysetId: (keys: MintKeys[], keysetId: string) => MintKeys | undefined;
export declare const isPow2: (number: number) => boolean;
export declare const isValidToken: (obj: any) => boolean;
/**
 * removes a set of tokens from another set of tokens, and returns the remaining.
 * @param tokens
 * @param tokensToRemove
 * @returns
 */
export declare const getTokenSubset: (tokens: Array<Proof>, tokensToRemove: Array<Proof>) => Proof[];
export declare const getAmountForTokenSet: (tokens: Array<Proof>) => number;
export declare const getUnitForKeysetId: (mints: Mint[], keysetId: string) => string;
export declare const getMintForKeysetId: (mints: Mint[], keysetId: string) => Mint | undefined;
export declare const getExactAmount: (amount: number, proofs: Proof[], includeFees?: boolean) => Proof[] | undefined;
export declare const getAproxAmount: (amount: number, proofs: Proof[], includeFees?: boolean) => Proof[] | undefined;
export declare const getProofsOfMintUnit: (mint: Mint, proofs: Proof[], unit?: string) => Proof[];
export declare const getProofsOfMintsUnit: (mints: Mint[], proofs: Proof[], unit?: string) => Proof[];
export declare const getKeysetsOfTokens: (tokens: Array<Proof>) => string[];
export declare const removeDuplicatesFromArray: <Type>(array: Array<Type>) => Type[];
export declare const formatAmount: (amount: number, unit?: string) => string;
export declare const formatTime: (time: number) => string;
export declare const formatSecToMinStr: (seconds: number) => string;
export declare const getUnitSymbol: (unit: string, isLong?: boolean) => string;
export declare const getInvoiceFromAddress: (address: string, amount: number) => Promise<{
    pr: string;
    maxSendable: number;
    minSendable: number;
}>;
export declare const getInvoiceFromLNURL: (LNURL: string, amount: number) => Promise<{
    pr: string;
    maxSendable: number;
    minSendable: number;
}>;
export declare const isNumeric: (value: unknown) => boolean;
export declare const getUnitsForMints: (mints: Mint[]) => string[];
export declare const getWalletWithUnit: (mints: Mint[], mintUrl: string, unit?: string) => Promise<CashuWallet>;
export declare const checkValidPubkey: (pubkey: string) => boolean;
export declare const getConvertedPubKey: (key: string) => Promise<string>;
export declare const resolveNip05: (nostrAddr: string) => Promise<string>;
export declare const separateProofsById: (proofs: Proof[]) => {
    id: string;
    proofs: Proof[];
}[];
export declare const parseSecrets: (token: Token) => {
    lockPubs: string[];
    allDLEQsValid: boolean;
    timelock: number;
    isKnownMint: boolean;
};