import { PrePeginParams } from './pegin';
/**
 * Parameters for building a refund PSBT
 */
export interface BuildRefundPsbtParams {
    /** Same PrePeginParams used when the original Pre-PegIn tx was created */
    prePeginParams: PrePeginParams;
    /** Funded Pre-PegIn transaction hex (the tx whose HTLC output is being refunded) */
    fundedPrePeginTxHex: string;
    /** Index of the HTLC output in the Pre-PegIn transaction */
    htlcVout: number;
    /** Transaction fee in satoshis for the refund transaction */
    refundFee: bigint;
    /** SHA256 hash commitment for the HTLC (64 hex chars, no 0x prefix) */
    hashlock: string;
}
/**
 * Result of building a refund PSBT
 */
export interface BuildRefundPsbtResult {
    /** PSBT hex ready for depositor signing */
    psbtHex: string;
}
/**
 * Build a PSBT for signing the refund transaction.
 *
 * The refund transaction spends the Pre-PegIn HTLC output via leaf 1
 * (the refund script: `<timelockRefund> CSV DROP <depositorPubkey> CHECKSIG`).
 * The PSBT includes the tapLeafScript entry so the depositor's wallet can
 * sign using Taproot script-path spending.
 *
 * The input's sequence is set to `timelockRefund` by the WASM, enforcing
 * the Bitcoin CSV timelock. The refund broadcast will be rejected by the
 * network if the timelock has not yet expired.
 *
 * @param params - Refund PSBT parameters
 * @returns PSBT hex for depositor signing
 * @throws If the HTLC output at htlcVout is not found
 * @throws If the refund transaction does not have exactly 1 input
 */
export declare function buildRefundPsbt(params: BuildRefundPsbtParams): Promise<BuildRefundPsbtResult>;
//# sourceMappingURL=refund.d.ts.map