bitburner-src/src/Hacknet/IHacknetNode.ts

// Interface for a Hacknet Node. Implemented by both a basic Hacknet Node,
// and the upgraded Hacknet Server in BitNode-9
export interface IHacknetNode {
    cores: number;
    level: number;
    onlineTimeSeconds: number;

    calculateCoreUpgradeCost: (levels: number, costMult: number) => number;
    calculateLevelUpgradeCost: (levels: number, costMult: number) => number;
    calculateRamUpgradeCost: (levels: number, costMult: number) => number;
    upgradeCore: (levels: number, prodMult: number) => void;
    upgradeLevel: (levels: number, prodMult: number) => void;
    upgradeRam: (levels: number, prodMult: number) => void;
}