Unexpected `Transfer` transaction in swap (`SwapExactAmountIn`)

[Chralt98]

Consider the following query:

query MyQuery {
  txs: historicalAccountBalances(limit: 100, orderBy: timestamp_ASC, where: {
    extrinsic: { hash_eq: "0x22cc65dd857ba6799d27a2ada8efb6496015638bd4c2c8da9d468c5f82cc8f33" }
    accountId_eq: "dE17owFuqybtXatuqm4n4Qu1Gxjdatctj7SY224E19x86vQ7o",
  }) {
    accountId
    assetId
    dBalance
    blockNumber
    event
    extrinsic {
      hash
      name
    }
    id
    timestamp
  }
  swaps: historicalSwaps(limit: 10, orderBy: timestamp_ASC, where: {
    extrinsic: { hash_eq: "0x22cc65dd857ba6799d27a2ada8efb6496015638bd4c2c8da9d468c5f82cc8f33"},
  }) {
    accountId
    assetAmountIn
    assetAmountOut
    assetIn
    assetOut
    blockNumber
    event
    extrinsic {
      name
      hash
    }
    id
    timestamp
  }
}

I get this output:

    "txs": [
      {
        "accountId": "dE17owFuqybtXatuqm4n4Qu1Gxjdatctj7SY224E19x86vQ7o",
        "assetId": "Ztg",
        "dBalance": "-255840876",
        "blockNumber": 4316427,
        "event": "Withdraw",
        "extrinsic": {
          "hash": "0x22cc65dd857ba6799d27a2ada8efb6496015638bd4c2c8da9d468c5f82cc8f33",
          "name": "Swaps.swap_exact_amount_in"
        },
        "id": "0004316427-9e5fc-000003-6vQ7o",
        "timestamp": "2023-11-22T15:40:12.423000Z"
      },
      {
        "accountId": "dE17owFuqybtXatuqm4n4Qu1Gxjdatctj7SY224E19x86vQ7o",
        "assetId": "{\"categoricalOutcome\":[317,3]}",
        "dBalance": "-840170",
        "blockNumber": 4316427,
        "event": "Transfer",
        "extrinsic": {
          "hash": "0x22cc65dd857ba6799d27a2ada8efb6496015638bd4c2c8da9d468c5f82cc8f33",
          "name": "Swaps.swap_exact_amount_in"
        },
        "id": "0004316427-9e5fc-000004-6vQ7o",
        "timestamp": "2023-11-22T15:40:12.423000Z"
      },
      {
        "accountId": "dE17owFuqybtXatuqm4n4Qu1Gxjdatctj7SY224E19x86vQ7o",
        "assetId": "{\"categoricalOutcome\":[317,3]}",
        "dBalance": "-1765752000000",
        "blockNumber": 4316427,
        "event": "Transfer",
        "extrinsic": {
          "hash": "0x22cc65dd857ba6799d27a2ada8efb6496015638bd4c2c8da9d468c5f82cc8f33",
          "name": "Swaps.swap_exact_amount_in"
        },
        "id": "0004316427-9e5fc-000006-6vQ7o",
        "timestamp": "2023-11-22T15:40:12.423000Z"
      },
      {
        "accountId": "dE17owFuqybtXatuqm4n4Qu1Gxjdatctj7SY224E19x86vQ7o",
        "assetId": "Ztg",
        "dBalance": "80008656190",
        "blockNumber": 4316427,
        "event": "Transfer",
        "extrinsic": {
          "hash": "0x22cc65dd857ba6799d27a2ada8efb6496015638bd4c2c8da9d468c5f82cc8f33",
          "name": "Swaps.swap_exact_amount_in"
        },
        "id": "0004316427-9e5fc-000007-6vQ7o",
        "timestamp": "2023-11-22T15:40:12.423000Z"
      },
      {
        "accountId": "dE17owFuqybtXatuqm4n4Qu1Gxjdatctj7SY224E19x86vQ7o",
        "assetId": "Ztg",
        "dBalance": "-400043280",
        "blockNumber": 4316427,
        "event": "MarketCreatorFeesPaid",
        "extrinsic": {
          "hash": "0x22cc65dd857ba6799d27a2ada8efb6496015638bd4c2c8da9d468c5f82cc8f33",
          "name": "Swaps.swap_exact_amount_in"
        },
        "id": "0004316427-9e5fc-000010-6vQ7o",
        "timestamp": "2023-11-22T15:40:12.423000Z"
      }
    ],
    "swaps": [
      {
        "accountId": "dE17owFuqybtXatuqm4n4Qu1Gxjdatctj7SY224E19x86vQ7o",
        "assetAmountIn": "1765752000000",
        "assetAmountOut": "80008656190",
        "assetIn": "{\"categoricalOutcome\":[317,3]}",
        "assetOut": "Ztg",
        "blockNumber": 4316427,
        "event": "SwapExactAmountIn",
        "extrinsic": {
          "name": "Swaps.swap_exact_amount_in",
          "hash": "0x22cc65dd857ba6799d27a2ada8efb6496015638bd4c2c8da9d468c5f82cc8f33"
        },
        "id": "0004316427-9e5fc-000008",
        "timestamp": "2023-11-22T15:40:12.423000Z"
      }
    ],

I couldn't match the -840170 Transfer transaction. Why does this transaction appear? All other transactions are fine (expected) associated to the swap event.

[Chralt98]

The same question for the following extrinsic hash: 0x3d1ae6633e6f811ecbacad51bb9bae6f40254ba941c68eba45e1c41096eb4b2b.

[saboonikhil]

On checking on-chain, it looks like some tokens were lost as dust.

[Chralt98]

Ok, perfect, thanks! I will expect this kind of transaction in my capital gain export.

[Chralt98]

Why does this query yield no result then?

query MyQuery {
  historicalAccountBalances(limit: 10, orderBy: timestamp_ASC, where: {
       accountId_eq: "dE17owFuqybtXatuqm4n4Qu1Gxjdatctj7SY224E19x86vQ7o", 
       event_eq: "DustLost",
  }) {
    accountId
    assetId
    dBalance
    blockNumber
    event
    extrinsic {
      hash
      name
    }
    id
    timestamp
  }
}

When I can see it here? https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Fmain.rpc.zeitgeist.pm%2Fws#/explorer/query/4655902

@saboonikhil

[Chralt98]

Because DustLost is not captured (Transfer is given priority)

[Chralt98]

@saboonikhil Can we use the DustLost event instead of the Transfer event instead? From a capital gain point of view, it is a loss instead of a normal transfer. Or can we somehow add a label onto these records so that I can figure out that these are DustLost events?