/** The type and the message of an inner error, carried as `data.cause` by a wrapping error. */
export interface ErrorCause {
    /** The `type` of a typed error, or the `name` of a plain `Error`. */
    type: string;
    /** The message of the inner error. */
    message: string;
}
/**
 * Describe an inner error for the `data.cause` of a wrapping typed error. The update paths
 * raise `INVALID_DID_UPDATE` for every failure that the specification names; the inner error
 * of the cryptosuite, the multikey, the hash decoder, or the common package rides along here.
 * @param {unknown} error The inner error.
 * @returns {ErrorCause} The type and the message of the inner error.
 */
export declare function errorCause(error: unknown): ErrorCause;
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