type Address = string;
type Scope = string;
declare global {
    namespace Transporter {
        /**
         * The address book is used to keep a record of all server addresses. Every
         * server must have a globally unique address. A server address is a lot
         * like a port number. It is used to route request to the correct server.
         *
         * The address book is a global singleton. The same address book is used
         * by all versions of transporter in the current execution context.
         *
         * You can inspect the address book from the `Transporter` namespace in the
         * global scope.
         */
        const addressBook: Map<Scope, Map<Address, void>>;
    }
}
export declare class UniqueAddressError extends Error {
    readonly name = "UniqueAddressError";
}
/**
 * Adds an address to the address book.
 *
 * @throws {UniqueAddressError} If the address already exists.
 */
export declare function add(scope: Scope, address: Address): void;
/**
 * Removes an address from the address book.
 */
export declare function release(scope: Scope, address: Address): void;
export {};
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