How to save a world?

[arcctg]

I don't understand how to save a world using https://github.com/PrismarineJS/mineflayer/blob/master/examples/anvil_saver/saver.js

(If I understand correctly that this bot downloads the world in which to be. If not, is it possible to download а world?)

I got an error:

    worldName = worldName.replace(/:/g, '_')
                          ^

TypeError: worldName.replace is not a function

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.
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If I change the code worldName = worldName.replace(/:/g, '_') to worldName = String(worldName).replace(/:/g, '_'), it gives another error:

node:internal/process/promises:288
            triggerUncaughtException(err, true /* fromPromise */);
            ^

AssertionError [ERR_ASSERTION]: Computed bits per block for palette size of 7 (3) does not match bits per block in section, 4
    at writeSections (C:\Users\Stepan\bot\node_modules\prismarine-provider-anvil\src\1.18\chunk.js:37:18)
    at toNBT (C:\Users\Stepan\bot\node_modules\prismarine-provider-anvil\src\1.18\chunk.js:100:35)
    at Anvil.save (C:\Users\Stepan\bot\node_modules\prismarine-provider-anvil\src\anvil.js:44:19)
    at World.saveNow (C:\Users\Stepan\bot\node_modules\prismarine-world\src\world.js:139:30)
    at Timeout._onTimeout (C:\Users\Stepan\bot\node_modules\prismarine-world\src\world.js:147:18)
    at listOnTimeout (node:internal/timers:564:17)
    at process.processTimers (node:internal/timers:507:7) {
  generatedMessage: false,
  code: 'ERR_ASSERTION',
  actual: 3,
  expected: 4,
  operator: 'strictEqual'
}

Node.js v18.1.0

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worldName = worldName.replace(/:/g, '_') ==> worldName value is

{
  type: 'compound',
  name: '',
  value: {
    piglin_safe: { type: 'byte', value: 0 },
    natural: { type: 'byte', value: 1 },
    ambient_light: { type: 'float', value: 0 },
    infiniburn: { type: 'string', value: '#minecraft:infiniburn_overworld' },
    respawn_anchor_works: { type: 'byte', value: 0 },
    has_skylight: { type: 'byte', value: 1 },
    bed_works: { type: 'byte', value: 1 },
    effects: { type: 'string', value: 'minecraft:overworld' },
    has_raids: { type: 'byte', value: 1 },
    logical_height: { type: 'int', value: 384 },
    coordinate_scale: { type: 'double', value: 1 },
    min_y: { type: 'int', value: -64 },
    has_ceiling: { type: 'byte', value: 0 },
    ultrawarm: { type: 'byte', value: 0 },
    height: { type: 'int', value: 384 }
  }
}

worldName = String(worldName).replace(/:/g, '_') ==> worldName value is [object Object]

[rom1504]

worldName should be a string
Can you put it and report the value it has in your case ?

[arcctg]

I wrote worldName = worldName.toString().replace(/:/g, '_') and got new error:

node:internal/process/promises:288
            triggerUncaughtException(err, true /* fromPromise */);
            ^

AssertionError [ERR_ASSERTION]: Computed bits per block for palette size of 7 (3) does not match bits per block in section, 4
    at writeSections (C:\Users\Stepan\bot\node_modules\prismarine-provider-anvil\src\1.18\chunk.js:37:18)
    at toNBT (C:\Users\Stepan\bot\node_modules\prismarine-provider-anvil\src\1.18\chunk.js:100:35)
    at Anvil.save (C:\Users\Stepan\bot\node_modules\prismarine-provider-anvil\src\anvil.js:44:19)
    at World.saveNow (C:\Users\Stepan\bot\node_modules\prismarine-world\src\world.js:139:30)
    at Timeout._onTimeout (C:\Users\Stepan\bot\node_modules\prismarine-world\src\world.js:147:18)
    at listOnTimeout (node:internal/timers:564:17)
    at process.processTimers (node:internal/timers:507:7) {
  generatedMessage: false,
  code: 'ERR_ASSERTION',
  actual: 3,
  expected: 4,
  operator: 'strictEqual'
}

Node.js v18.1.0

[rom1504]

Can you console.log worldName

[arcctg]

{
  type: 'compound',
  name: '',
  value: {
    piglin_safe: { type: 'byte', value: 0 },
    natural: { type: 'byte', value: 1 },
    ambient_light: { type: 'float', value: 0 },
    infiniburn: { type: 'string', value: '#minecraft:infiniburn_overworld' },
    respawn_anchor_works: { type: 'byte', value: 0 },
    has_skylight: { type: 'byte', value: 1 },
    bed_works: { type: 'byte', value: 1 },
    effects: { type: 'string', value: 'minecraft:overworld' },
    has_raids: { type: 'byte', value: 1 },
    logical_height: { type: 'int', value: 384 },
    coordinate_scale: { type: 'double', value: 1 },
    min_y: { type: 'int', value: -64 },
    has_ceiling: { type: 'byte', value: 0 },
    ultrawarm: { type: 'byte', value: 0 },
    height: { type: 'int', value: 384 }
  }
}

If I wrote this worldName = worldName.toString().replace(/:/g, '_') I would get console.log [object Object]

[rom1504]

ok so that's a bug, I'm transforming that into an issue

[rom1504]

#2640