How do we resolve the InvalidScheduleVersion error?

Question

From the contracts pallet:

        /// A new schedule must have a greater version than the current one.
        InvalidScheduleVersion,

The context of this error is sending batch transactions from polkadot-js.

api.tx.utility.batchAll(txs)

Presumably these are being scheduled using the schedule pallet?

I'm using the substrate-contracts-node 0.23.0-430873a4fbe

Answer 1

This is an issue in the translation of the error data to the error message when using the following findMetaError from polkadot-js.

const mod = dispatchError.asModule
const error = this.api.registry.findMetaError(
    new Uint8Array([mod.index.toNumber(), new BN(mod.error).toNumber()])
)

Because the hexadecimal mod.error is 0x02000000, the decimal representation of this is 33554432, which is not one of the indices in the pallet contracts errors (search for 523 in this file).

Presumably, the hexadecimal used to index should have been 0x02, which converts to index 2 and OutOfGas.

> util.bnFromHex('0x02000000').toNumber()
33554432
> util.bnFromHex('0x02').toNumber()
2

  {
    "id": 523,
    "type": {
      "path": [
        "pallet_contracts",
        "pallet",
        "Error"
      ],
      "params": [
        {
          "name": "T",
          "type": null
        }
      ],
      "def": {
        "variant": {
          "variants": [

            ...

            {
              "name": "OutOfGas",
              "fields": [],
              "index": 2,
              "docs": [
                "The executed contract exhausted its gas limit."
              ]
            },

EDIT: it looks like the additional bytes can include error details.