import { BigNumber, Contract, ContractTransaction } from 'ethers';
import { Interface } from 'ethers/lib/utils';
export declare function assertAlmostEqual(actual: BigNumber, expected: BigNumber, error: number): void;
export declare function assertEvent(tx: ContractTransaction, eventName: string, eventArgs?: {}): Promise<any>;
export declare function assertIndirectEvent(tx: ContractTransaction, emitter: Interface, eventName: string, eventArgs?: {}): Promise<any>;
export declare function assertNoEvent(tx: ContractTransaction, eventName: string): Promise<void>;
export declare function assertNoIndirectEvent(tx: ContractTransaction, emitter: Interface, eventName: string): Promise<void>;
export declare type NAry<N> = N | N[];
export declare type PermissionAssertion = {
    name: string;
    roles: string[];
    account: NAry<{
        address: string;
    } | string>;
};
export declare function assertPermissions(target: Contract, assertions: PermissionAssertion[]): Promise<void>;