import { PublicKey } from "@solana/web3.js";
/** Poseidon hash function type from circomlibjs. */
export type PoseidonFn = ((inputs: bigint[]) => any) & {
    F: {
        toObject: (e: any) => bigint;
    };
};
/** Initialize the Poseidon hash instance. Must be called once before using any UTXO/merkle/proof helpers. */
export declare function initPoseidon(): Promise<void>;
/** Get the initialized Poseidon instance. Throws if `initPoseidon()` has not been called. */
export declare function getPoseidon(): PoseidonFn;
/** The BN254 (alt_bn128) scalar field modulus. All Poseidon outputs are reduced modulo this value. */
export declare const BN254_FR_MODULUS: bigint;
/** Convert a big-endian byte array to a bigint. */
export declare function bytesToBigIntBE(bytes: Uint8Array): bigint;
/** Convert a bigint to a 32-byte big-endian array. */
export declare function bigIntToBytesBE(x: bigint): Uint8Array;
/** Convert ffjavascript field element → bigint safely */
export declare function frToBigInt(fe: any): bigint;
/** Poseidon hash with 1 input - used for keypair derivation: pubkey = Poseidon(privateKey) */
export declare function poseidon1(a: bigint): bigint;
/** Poseidon hash with 2 inputs */
export declare function poseidon2(a: bigint, b: bigint): bigint;
/** Poseidon hash with 3 inputs - used for signature: Poseidon(privateKey, commitment, pathIndex) */
export declare function poseidon3(a: bigint, b: bigint, c: bigint): bigint;
/** Poseidon hash with 4 inputs - used for UTXO commitment: Poseidon(amount, pubkey, blinding, mintAddress) */
export declare function poseidon4(a: bigint, b: bigint, c: bigint, d: bigint): bigint;
/** Convert a Solana PublicKey to a BN254 field element */
export declare function pubkeyToField(pubkey: PublicKey): bigint;