import { type Account, type Address, type Chain, type Client, type Transport } from 'viem';
export type ERC20BalanceOptions = {
    token?: Address;
    address: Address;
};
export type ERC20BalanceResult = {
    value: bigint;
    decimals: number;
    symbol: string;
    allowance: bigint;
};
export declare function balance(client: Client<Transport, Chain>, options: ERC20BalanceOptions): Promise<ERC20BalanceResult>;
export type ERC20ApproveAllowanceOptions = {
    token?: Address;
    amount: bigint;
};
export declare function approveAllowance(client: Client<Transport, Chain, Account>, options: ERC20ApproveAllowanceOptions): Promise<`0x${string}`>;
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