import * as utxolib from '@bitgo/utxo-lib';
export declare function addBip322ProofMessage(psbt: utxolib.Psbt, inputIndex: number, message: Buffer): void;
/**
 * Get the BIP322 proof message at a specific input index of the PSBT
 * @param psbt
 * @param inputIndex
 * @returns The BIP322 proof message as a Buffer, or undefined if not found
 */
export declare function getBip322ProofMessageAtIndex(psbt: utxolib.Psbt, inputIndex: number): Buffer | undefined;
/**
 * checks if the transaction contains a BIP322 proof
 * does not check if the proof is valid
 * Source: https://github.com/bitcoin/bips/blob/master/bip-0322.mediawiki#user-content-Full
 * @params tx The transaction or the PSBT to check
 * @returns boolean
 */
export declare function isBip322ProofCheck(tx: utxolib.bitgo.UtxoPsbt | utxolib.bitgo.UtxoTransaction<bigint>): boolean;
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