import { PublicClient } from 'viem';
export declare function getBoolean(str: string | undefined, defaultVal?: boolean): boolean;
export declare function getNumber(str: string | undefined, { defaultVal }?: {
    defaultVal?: string | undefined;
}): number;
export declare function getString(str: string | undefined, { defaultVal, required, }?: {
    defaultVal?: string | undefined;
    required?: boolean;
}): string;
export declare function getBigInt(str: string | undefined, { defaultVal }?: {
    defaultVal?: undefined;
}): bigint;
export declare function waitTxReceipt({ publicClient }: {
    publicClient: PublicClient;
}, txHash: `0x${string}`): Promise<import("viem").TransactionReceipt>;
export declare function getStringArray(str: string | undefined, defaultVal?: string[]): string[];
export declare function isSupportedChain(chainId: number): boolean;
export declare function validateOrThrow(condition: any, message: string): asserts condition;