Generate typescript types from IDL of external program

[decr1x]

I've cloned an IDL of program from mainnet - its a json file. How can I generate a types from it so that I can use them in my typescript tests in anchor?

[decr1x]

Question resolved: use anchor idl type. Note for future readers: if you cloned legacy version of IDL(pre anchor 0.30.1), then before you use anchor type, convert modern IDL to old one via anchor idl convert.