import { DepositTerms } from './depositTerms';
/**
 * Minimal structural wallet for the Pre-PegIn ceremony. Mirrors
 * `DeriveContextHashCapableWallet` so an app-side wrapper object qualifies
 * without implementing all of `BitcoinWallet`. All methods are optional so
 * the capability probe below can run on any wallet.
 */
export interface PrePeginApprovalWallet {
    deriveContextHash?(appName: string, context: string): Promise<string>;
    approveDepositTerms?(terms: DepositTerms): Promise<void>;
    holdsApprovedDepositTerms?(terms: DepositTerms): Promise<boolean>;
    validateDepositTerms?(terms: DepositTerms): Promise<void>;
}
export interface EnsurePrePeginTermsApprovalParams {
    wallet: PrePeginApprovalWallet;
    /** The approved terms — required for approval-capable wallets, ignored (but still txid-checked) otherwise. */
    depositTerms: DepositTerms | undefined;
    /** Funded Pre-PegIn tx hex (0x optional): the funding outpoints AND the txid the terms must match. */
    fundedPrePeginTxHex: string;
    /** x-only depositor pubkey (64 hex, 0x optional) — the identity the PSBT is signed with. */
    depositorBtcPubkey: string;
}
/**
 * Run the derive → approve ceremony (or a no-op) before a Pre-PegIn signature.
 *
 * - Non-approval wallets: no-op, after asserting the terms (if any) match the tx.
 * - Approval-capable wallets: require terms, assert they match this tx's txid,
 *   derive the vault root over the tx's funding outpoints, then approve.
 *
 * Skip fast-path: when `holdsApprovedDepositTerms` reports the byte-equal
 * intent still live, the ceremony is skipped — it survives everything the
 * flow does in between (PoP/PegIn signing spend separate device state;
 * app-babylon-vault `sign_psbt_validate.c` @ 73a57c50). A stale true fails
 * closed at the signature; the retry then re-runs the full ceremony.
 *
 * Otherwise always derives first — the host cannot read device state, so
 * this path never approves-only.
 *
 * @throws If approval-capable but no terms are provided, or the provided terms
 *   are for a different transaction.
 */
export declare function ensurePrePeginTermsApproval(params: EnsurePrePeginTermsApprovalParams): Promise<void>;
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