fromJson is not defined

[codingMASTER398]

(node:15636) UnhandledPromiseRejectionWarning: TypeError: j.fromJson is not a function

Documentation:
"Chunk.fromJson(j)
Load chunk from json"

My code:

async function go() {
    var Anvil = require('prismarine-provider-anvil').Anvil('1.16')
    var v = require('vec3');
    const Chunk = require('prismarine-chunk')('1.8')
    var anv = new Anvil('/home/USER/.minecraft/saves/ack/region')
    console.log(anv)
    ack = await anv.getRegion(0, 0)
    console.log(ack)
    j = new Chunk()
    j.fromJson(ack)
    j.getBlock(v(0, 0, 0))
    
}
go()

Output:

(node:15636) UnhandledPromiseRejectionWarning: TypeError: j.fromJson is not a function
    at go (/home/lachie/Documents/mcworld/index.js:10:7)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:15636) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:15636) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

What is wrong here???

[rom1504]

Please check provider anvil doc.
Json is not involved here

[Karang]

How did you come up with this code ? Is this randomly generated ?

and the fromJson() function is a static function of Chunk, not an instance method

[codingMASTER398]

I just want to access my world from node.js, so i came up with this code.
@Karang, thank you! I will try to use fromJson from Chunk

[rom1504]

https://github.com/PrismarineJS/prismarine-provider-anvil/blob/master/examples/example_read_anvil.js

[rom1504]

https://github.com/PrismarineJS/prismarine-world/blob/master/examples/anvil.js