Unexpected values received for types i8 and i16 from ink! contract

[sharma66mahesh]

• I'm submitting a ...

• Bug report

• What is the current behavior and expected behavior?
  Upon uploading this ink! contract, I was expecting to receive the values of the variables my_i8 and my_i16 to be 127 and 32767 as it was set in the ink! contract respectively.

However, I received -129 and -32769 as the values for my_i8 and my_i16 respectively.

The following is the output of querying the contract's get method:

{"msg":"ICE/SNOW Network","u8Arr":"0x010203","value":"0x7fffffffffffffffffffffffffffffff","isTrue":true,"myAccount":"npRm3oLNUahbPgUnwjPYw9oLWdEigk6aHzwtvj4nibfAJMYVo","myBalance":123123123123,"myHash":"0xe0d83c067d9abf593a8089ef1f21fc30fafb02a8dd67a862f8ca47eb158735b9","myVec":[-65535,-65534,-65533,-65532,-65531,-65530,-65529,-65528,-65527,-65526,-65525],"myStruct":{"id":1,"status":"Invalid","strArr":["Str1","Str2"]},"myIntStruct":{"myU8":255,"myU16":65535,"myU32":4294967295,"myU64":"0xffffffffffffffff","myU128":"0xffffffffffffffffffffffffffffffff","myI8":-129,"myI16":-32769,"myI32":2147483647,"myI64":"0x7fffffffffffffff","myI128":"0x7fffffffffffffffffffffffffffffff"}}

• What is the motivation for changing the behavior?

• Please tell us about your environment:

  • Version: polkadot-v0.9.36, @polkadot-js/api v9.13.6, @polkadot-js/api-contract v9.13.6

  • Environment:

    • Node.js
    • Browser
    • Other (limited support for other environments)

  • Language:

    • JavaScript
    • TypeScript (include tsc --version)
    • Other

[cmichi]

@statictype @DoubleOTheven Any idea?

[DoubleOTheven]

Hey @sharma66mahesh, would you please share the metadata for that contract?

I would try updating polkadotjs to the latest version in the mean time

[sharma66mahesh]

@DoubleOTheven Here is the link to the compiled contract:
https://easyupload.io/m/ggzozt

[DoubleOTheven]

@sharma66mahesh Thanks for sharing

1. I tested on Contracts on Rococo and it is exactly as you said.
2. I also tested on a local React app and decoded the raw values. Same result:

{
  "myIntStruct": ​​{
    "myI16": "-32,769"
    "myI8": "-129"
    // ... omitted
​​  }
  // ...omitted
}

It looks like i8 and i16 values are not correctly decoded from the raw response. i64 IS, however. I will ping the dev team on internal comms.

[jacogr]

Closing on the back of #5506 which seems like it would be the root cause. Comments to "still an issue on latest" would re-open.

[statictype]

still an issue on latest

[jacogr]

#5702 addresses the root causes (tracing back to the common repo).

[polkadot-js-bot]

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