import { PublicKey } from "@solana/web3.js";
import type { InputUTXO, SerializedUTXO } from "../notes/model.js";
import type { ExtData, TransactionCircuitInputs } from "./types.js";
/**
 * Compute the external data hash.
 * Matches on-chain computation:
 *   hash1 = Poseidon(recipient, relayer)
 *   hash2 = Poseidon(fee, refund)
 *   extDataHash = Poseidon(hash1, hash2, claimant)
 */
export declare function computeExtDataHash(extData: ExtData): Uint8Array;
/**
 * Convert i64 to field element (handles negative via modular arithmetic).
 * For negative values, we add the field modulus to get the equivalent positive representation.
 */
export declare function i64ToField(value: bigint): bigint;
/**
 * Prepare transaction circuit inputs from high-level parameters.
 * This converts the SDK types into the format expected by the circuit.
 */
export declare function prepareTransactionInputs(params: {
    inputUTXOs: [InputUTXO, InputUTXO];
    outputUTXOs: [SerializedUTXO, SerializedUTXO];
    root: Uint8Array;
    publicAmount: bigint;
    extData: ExtData;
    mintAddress: PublicKey;
}): TransactionCircuitInputs;