/**
 * Identity resolution for People chain (Resources pallet).
 *
 * A standalone module that queries People chain RPC endpoints using fetch().
 * No smoldot dependency. The caller provides an IdentityEncoder (typically
 * the WASM IdentityHandle) for key building and SCALE decoding.
 *
 * @example
 * ```ts
 * import { resolveUsername, POLKADOT_PEOPLE_TRANSPORT } from "@polkadot-apps/host-sdk/identity";
 * // encoder is the WASM IdentityHandle instance
 * const accountId = await resolveUsername("alice", POLKADOT_PEOPLE_TRANSPORT, encoder);
 * ```
 */
/** Transport backed by direct HTTP fetch to People chain RPC nodes. */
export type PeopleChainEndpoints = {
    kind: "fetch";
    endpoints: string[];
};
/**
 * Transport for People chain RPC calls.
 *
 * - "fetch": tries the listed endpoints in order until one succeeds.
 * - "custom": delegates to the provided send function.
 */
export type IdentityTransport = PeopleChainEndpoints | {
    kind: "custom";
    send: (request: string) => Promise<string>;
};
/** Decoded consumer info from Resources.Consumers storage. */
export interface ConsumerInfo {
    identifierKey: Uint8Array;
    fullUsername: string | null;
    liteUsername: string;
    credibility: {
        type: "Lite";
    } | {
        type: "Person";
        alias: Uint8Array;
        lastUpdate: number;
    };
}
/**
 * Pure encoding and decoding helpers for identity storage keys and responses.
 *
 * Implemented by the WASM IdentityHandle. Tests may pass a mock.
 */
export interface IdentityEncoder {
    /** Build the state_getStorage hex key for Resources.UsernameOwnerOf. */
    usernameOwnerOfKey(username: string): string;
    /** Build the state_getStorage hex key for Resources.Consumers. */
    consumersKey(accountIdHex: string): string;
    /** Decode SCALE Option<AccountId32> bytes → 0x-prefixed hex string or null. */
    decodeAccountOfUsername(data: Uint8Array): string | null;
    /** Decode SCALE ConsumerInfo bytes → ConsumerInfo or null. */
    decodeConsumerInfo(data: Uint8Array): ConsumerInfo | null;
}
/** RPC endpoints for the Polkadot People chain. */
export declare const POLKADOT_PEOPLE_TRANSPORT: PeopleChainEndpoints;
/** RPC endpoints for the Paseo People chain (testnet). */
export declare const PASEO_PEOPLE_TRANSPORT: PeopleChainEndpoints;
/**
 * Resolve a username to its owner account ID on the People chain.
 *
 * @param username - The username to look up. ASCII, [a-z0-9.], 1–32 chars.
 *   Case-insensitive: the string is lowercased before querying.
 * @param transport - RPC transport to use for the state_getStorage call.
 * @param encoder - IdentityEncoder (WASM IdentityHandle or mock).
 * @returns The 0x-prefixed hex account ID, or null if the username is not
 *   registered.
 * @throws If the username is invalid, the RPC call fails, or the SCALE data
 *   is malformed.
 */
export declare function resolveUsername(username: string, transport: IdentityTransport, encoder: IdentityEncoder): Promise<string | null>;
/**
 * Resolve an account's identity info from the People chain.
 *
 * @param accountIdHex - The 0x-prefixed 64-char hex account ID to look up.
 * @param transport - RPC transport to use for the state_getStorage call.
 * @param encoder - IdentityEncoder (WASM IdentityHandle or mock).
 * @returns A ConsumerInfo object, or null if the account has no identity.
 * @throws If the account ID is invalid, the RPC call fails, or the SCALE data
 *   is malformed.
 */
export declare function resolveIdentity(accountIdHex: string, transport: IdentityTransport, encoder: IdentityEncoder): Promise<ConsumerInfo | null>;
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