import { ethers } from 'ethers';
import { Chain, ChainFeeData } from './Chain';
/**
 * Japan Open Chain (chainId 81).
 *
 * Why this class exists: JOC is a legacy gasPrice chain. Its base fee is
 * effectively zero, but the RPC enforces a high *minimum* gas price (around
 * 30 gwei). EIP-1559 fields are not honored — submitting a transaction with
 * maxFeePerGas/maxPriorityFeePerGas instead of gasPrice gets rejected.
 *
 * The base class would happily try to use EIP-1559; we override
 * supportsEIP1559() to false and return only `gasPrice`, clamped to the
 * configured floor.
 */
export declare class JapanOpenChain extends Chain {
    static chainId: number;
    static defaults: {
        name: string;
        aliases: string[];
        rpc: string;
        nativeCurrencyName: string;
        nativeCurrencySymbol: string;
        nativeCurrencyDecimals: number;
    };
    supportsEIP1559(): boolean;
    protected minGasPrice(): ethers.BigNumber;
    getFeeData(): Promise<ChainFeeData>;
}
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