[Home](./index.md) > [bitburner](./bitburner.md) > [Singularity](./bitburner.singularity.md) > [getDarkwebProgramCost](./bitburner.singularity.getdarkwebprogramcost.md) ## Singularity.getDarkwebProgramCost() method Check the price of an exploit on the dark web **Signature:** ```typescript getDarkwebProgramCost(programName: ProgramName): number; ``` ## Parameters

Parameter	Type	Description
programName	[ProgramName](./bitburner.programname.md)	Name of program to check the price of

**Returns:** number Price of the specified darkweb program (if not yet purchased), 0 if it has already been purchased, or -1 if Tor has not been purchased. Throws an error if the specified program/exploit does not exist ## Remarks RAM cost: 0.5 GB \* 16/4/1 This function allows you to check the price of a darkweb exploit/program. You MUST have a TOR router in order to use this function. The price returned by this function is the same price you would see with buy -l from the terminal. Returns the cost of the program if it has not been purchased yet, 0 if it has already been purchased, or -1 if Tor has not been purchased (and thus the program/exploit is not available for purchase). If the program does not exist, an error is thrown. ## Example ```js const programName = "BruteSSH.exe"; const cost = ns.singularity.getDarkwebProgramCost(programName); if (cost > 0) ns.tprint(`${programName} costs $${ns.format.number(cost)}`); ```