/**
 * Checks that a value satisfies the structural contract required to encode EIP-712 typed data.
 *
 * The contract mirrors `getEncodedEip712Data` (`@theqrl/web3-qrl-abi`) — the encoder this library
 * and the QRL wallet share — rather than any node-side implementation. Typed-data signing is
 * answered by a wallet provider, which encodes with that same function, so these are precisely
 * the preconditions that must hold before a request is worth sending.
 *
 * Each check below corresponds to a value the encoder dereferences unconditionally; without them
 * a malformed request fails deep inside the encoder with an opaque `TypeError` (for example
 * "Cannot read properties of undefined (reading 'reduce')") instead of a typed validation error.
 *
 * Field-level data (that every member declared in a type is present in `domain`/`message`) is
 * deliberately NOT checked here: the encoder already reports that precisely
 * ("Cannot encode data: missing data for 'x'"), and duplicating it would mean re-implementing
 * type resolution.
 */
export declare const isEip712TypedData: (value: unknown) => boolean;