/**
 * @module attestation
 * @description Web-of-trust attestations — create, revoke, and close
 *   on-chain attestations that vouch for agent trustworthiness.
 *
 * Attestations are signed endorsements from one wallet to an agent,
 * forming a composable trust graph on Solana.
 *
 * @category Modules
 * @since v0.1.0
 * @packageDocumentation
 */
import { type PublicKey, type TransactionSignature } from "@solana/web3.js";
import { BaseModule } from "./base";
import type { AgentAttestationData, CreateAttestationArgs } from "../types";
/**
 * @name AttestationModule
 * @description Manages on-chain attestations for the Synapse Agent Protocol.
 *   Provides methods to create, revoke, close, and fetch attestation PDAs
 *   that form the web-of-trust layer.
 *
 * @category Modules
 * @since v0.1.0
 * @extends BaseModule
 *
 * @example
 * ```ts
 * const sap = new SapClient(provider);
 * // Create an attestation for an agent
 * const sig = await sap.attestation.create(agentWallet, {
 *   attestationType: { identity: {} },
 *   metadataHash: [...],
 *   expiresAt: null,
 * });
 * ```
 */
export declare class AttestationModule extends BaseModule {
    /**
     * @name deriveAttestation
     * @description Derive the `AgentAttestation` PDA for a given agent and attester.
     * @param agentPda - The agent account PDA to attest.
     * @param attester - The attester wallet. Defaults to the connected wallet.
     * @returns A tuple of `[PublicKey, bump]` for the attestation PDA.
     * @see {@link deriveAttestation} from `pda/` module for the underlying derivation.
     * @since v0.1.0
     */
    deriveAttestation(agentPda: PublicKey, attester?: PublicKey): readonly [PublicKey, number];
    /**
     * @name create
     * @description Create an on-chain attestation vouching for an agent.
     *   The connected wallet becomes the attester.
     * @param agentWallet - The wallet that owns the target agent.
     * @param args - Attestation parameters (type, metadata hash, optional expiry).
     * @returns {Promise<TransactionSignature>} The transaction signature.
     * @since v0.1.0
     */
    create(agentWallet: PublicKey, args: CreateAttestationArgs): Promise<TransactionSignature>;
    /**
     * @name revoke
     * @description Revoke a previously issued attestation. Only the original
     *   attester may revoke.
     * @param agentWallet - The wallet of the attested agent.
     * @returns {Promise<TransactionSignature>} The transaction signature.
     * @since v0.1.0
     */
    revoke(agentWallet: PublicKey): Promise<TransactionSignature>;
    /**
     * @name close
     * @description Close a revoked attestation PDA and reclaim rent to the attester.
     * @param agentWallet - The wallet of the attested agent.
     * @returns {Promise<TransactionSignature>} The transaction signature.
     * @since v0.1.0
     */
    close(agentWallet: PublicKey): Promise<TransactionSignature>;
    /**
     * @name fetch
     * @description Fetch a deserialized `AgentAttestation` account.
     * @param agentPda - The agent account PDA.
     * @param attester - The attester wallet. Defaults to the connected wallet.
     * @returns {Promise<AgentAttestationData>} The attestation account data.
     * @throws Will throw if the attestation account does not exist.
     * @since v0.1.0
     */
    fetch(agentPda: PublicKey, attester?: PublicKey): Promise<AgentAttestationData>;
    /**
     * @name fetchNullable
     * @description Fetch a deserialized `AgentAttestation` account, or `null`
     *   if it does not exist on-chain.
     * @param agentPda - The agent account PDA.
     * @param attester - The attester wallet. Defaults to the connected wallet.
     * @returns {Promise<AgentAttestationData | null>} The attestation data or `null`.
     * @since v0.1.0
     */
    fetchNullable(agentPda: PublicKey, attester?: PublicKey): Promise<AgentAttestationData | null>;
}
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