/**
 * Direct contract-data ledger reads that distinguish a genuine not-found from a
 * transport failure.
 *
 * `Server.getContractData` collapses BOTH a real not-found AND any transport
 * error (429/5xx/timeout, aborted fetch) into an identical `{ code: 404 }`
 * throw, so a caller can't tell "the entry is gone" from "the RPC hiccuped".
 * These helpers go one level lower: `getLedgerEntries` resolves with an empty
 * `entries` array for a genuine not-found and only throws on an actual transport
 * failure. That lets eviction detection and `getSigner`'s ownership check treat
 * the two cases correctly instead of false-evicting live signers (audit H2) or
 * reporting a valid passkey as "not a signer" on a flaky RPC.
 *
 * @packageDocumentation
 */
import { xdr } from "@stellar/stellar-sdk";
import { Durability, type Server } from "@stellar/stellar-sdk/rpc";
/** Build the contract-data `LedgerKey` for a (contract, key, durability) triple. */
export declare function contractDataLedgerKey(contractId: string, key: xdr.ScVal, durability: Durability): xdr.LedgerKey;
/**
 * Read a contract-data entry's stored ScVal, or `null` when the entry genuinely
 * does not exist in that durability.
 *
 * Transport errors are NOT swallowed — they propagate so a caller never mistakes
 * a flaky RPC for an absent entry.
 */
export declare function readContractData(rpc: Server, contractId: string, key: xdr.ScVal, durability: Durability): Promise<xdr.ScVal | null>;
/**
 * Whether a contract's instance entry exists on-chain.
 *
 * Returns `false` only on a genuine not-found; a transport error (429/5xx/
 * timeout) throws. `connectWallet` uses this to confirm the deterministically
 * derived wallet address: only an authoritative not-found may abandon the
 * canonical derivation for the storage/indexer fallbacks — a flaky RPC must
 * never reroute resolution away from the canonical derivation.
 */
export declare function contractInstanceExists(rpc: Server, contractId: string): Promise<boolean>;
/**
 * Whether a contract-data entry exists in the given durability.
 *
 * Returns `false` only on a genuine not-found; a transport error throws (so
 * callers conclude eviction exclusively from an authoritative not-found).
 */
export declare function contractDataExists(rpc: Server, contractId: string, key: xdr.ScVal, durability: Durability): Promise<boolean>;
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