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Incorrect value for vault debt #7

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jvalteren opened this issue Jan 19, 2021 · 9 comments
Open

Incorrect value for vault debt #7

jvalteren opened this issue Jan 19, 2021 · 9 comments

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@jvalteren
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Hi,

I'd like to use your subgraph to get specific Maker Vault collateral and debt values. I'm using cdpId 19417 for testing, of which I know the current debt (Tue 19 Jan 16:35 CET) is 9202.90 DAI (see https://defiexplore.com/cdp/19417).

However, querying the subgraph returns a debt of 8963.24.

Might this be related to pull request #6? Thanks!

Exact query:

{
  vaults(where:{ cdpId: 19417 }) {
    collateralType {
      id
    }
    collateral
    debt
  }
}

Response:

{
  "data": {
    "vaults": [
      {
        "collateral": "25",
        "collateralType": {
          "id": "ETH-A"
        },
        "debt": "8963.246306891334844794"
      }
    ]
  }
}
@jvalteren
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Author

Hi @sistemico and @juanmardefago, can you tell me if this is a legitimate issue? Perhaps I'm doing something wrong. Hope to hear from you! Best, Jonathan

@juanmardefago
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Contributor

Hey @jvalteren!
PR #6 is actually related to a fix to the system wide total debt, so it shouldn't be impacting specific vault debts.
I'll try to check it out asap, although I'm quite busy at the moment.

@sistemico, can you check it out soon?

@jvalteren
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Author

Thanks! I've been doing a bit of research myself, with the following results:

Coincidentally, I just got access to the MCD Vault Tracker beta (https://api.mcdstate.info/). Their 'vault_state' response returns the same value, but under a property named 'art' (https://api.mcdstate.info/api-documentation/multi-collateral-dai-vault-tracker-api-documentation#vault_state-id).

I'm not a Maker/blockchain developer, so I had to look this up. I found that this is a 'normalized' debt value which 'multiplied by the correct rate gives the up-to-date, current stablecoin debt' (source: https://docs.makerdao.com/smart-contract-modules/core-module/vat-detailed-documentation#glossary-vat-vault-engine).

The schema browser on TheGraph playground (on the right side) for your subgraph shows this description for Vault field debt: 'Outstanding debt (art) [DAI]'. This made me assume the response value would be actual DAI units. Under CollateralType there is a field called debtNormalized, with comment: 'Debt backed by this collateral type [DAI] (Art)'.

When multiplying the Vault field debt with CollateralType field rate, I'm now getting the expected debt in DAI units.

Is it possible for you to introduce Vault field normalizedDebt (similar to CollateralType)? I can understand that changing the value returned by Vault field debt might break any apps that are using your subgraph. In that case, perhaps you could clarify this in the schema comments.

Thanks for your work!

@sistemico
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Contributor

Awesome @jvalteren! And thank you so much for the research on this issue. For sure it's a bug and we should provide both normalized and raw values. We'll fix it as soon as posible. Thanks to you again for reporting and finding the problem.

@BearWithIvan
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BearWithIvan commented Jan 20, 2021 •
edited

Hi @sistemico and @juanmardefago,

I found another problem with debt and collateral value. I'm using cdpId 3851 for the test purpose, I found the current debt is 20.38 DAI and collateral is 200BAT (see https://defiexplore.com/cdp/3851).
Debt * rate doesn't help.

Response is:

{
  "data": {
    "vaults": [
      {
        "cdpId": "3851",
        "collateral": "383.15",
        "collateralType": {
          "id": "BAT-A"
        },
        "debt": "39.50140838541827308"
      }
    ]
  }
}

@sistemico
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Contributor

Hey @BearWithIvan, thanks for report! Gonna tackle this issue in the same strike.

@BearWithIvan
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Hi @sistemico, @juanmardefago,
Do you have any news about this issue?

@cold-briu
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Hi @BearWithIvan I'll be giving support to this subgraph in the following weeks. Expect updates soon.

@pad01g
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pad01g commented Sep 30, 2022 •
edited

@cold-briu
Hi, I've looked into source code of current dev branch and I can confirm at least following two functionality is missing and thus collateral and debt value is miscalculated.

  1. VaultSplitChangeLog is currently recorded only when src or dst vault already exists. However, fork may run without src or dst. It should try to record VaultSplitChangeLog even when src or dst does not exist, and if vault was emptied or fulfilled by this operation, collateral and debt should be affected accordingly.
  2. Liquidation event is not considered. Collateral and debt should be affected accordingly.

Here's example:
https://tracker-vaults.makerdao.network/vault/8114
https://defiexplore.com/cdp/8114

In this vault 8114, the final collateral and debt should be zero. However, when you query the following, result is not zero because of above two points.

query 
{
  vaults(
    where: { 
      collateralType: "ETH-A",
      cdpId: 8114
    },
    first: 1
  ){
    id,
    debt,
    collateral,
    cdpId,
    logs(orderBy: timestamp, orderDirection: desc){
      transaction,
      timestamp,
      __typename,
      ... on VaultCollateralChangeLog {
        collateralBefore,
        collateralAfter
      }
    },
  }
}
result

result from https://thegraph.com/explorer/subgraph?id=5TLohiwWUvfnXritG4NcL2MgTkeUqB6Ns6VouYxTw5xy&view=Playground

{
  "data": {
    "vaults": [
      {
        "id": "0xb671aa6ba13d8d27feb7e0c0f9f3347c994198f0-ETH-A",
        "debt": "24120.321801859282683123",
        "collateral": "21.128367318819360698",
        "cdpId": "8114",
        "logs": [
          {
            "transaction": "0x7f0861268028c01743096bbc55a5ea801b7cc927bf40b6520de2b1fc81d0849b",
            "timestamp": "1654784024",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "23.444300386974560091",
            "collateralAfter": "21.128367318819360698"
          },
          {
            "transaction": "0x69b8b24ca567cb52f16c477e862025d2c1205ebd7d4636b74c309c7194bf472e",
            "timestamp": "1652362687",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "21.128367318819360698",
            "collateralAfter": "23.444300386974560091"
          },
          {
            "transaction": "0x180d440d66228d79f828ca1138edc3a9b55307f3fdff0c07212af060f7fcfad0",
            "timestamp": "1651983165",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0x180d440d66228d79f828ca1138edc3a9b55307f3fdff0c07212af060f7fcfad0",
            "timestamp": "1651983165",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "34.671533562794871035",
            "collateralAfter": "33.002068415891061235"
          },
          {
            "transaction": "0xd57ca7224a53fedefe66dda2c53e1eaa15b24277de5d4b58de1ae7e5151c83bc",
            "timestamp": "1650262351",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0xd57ca7224a53fedefe66dda2c53e1eaa15b24277de5d4b58de1ae7e5151c83bc",
            "timestamp": "1650262351",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "36.561859212794871035",
            "collateralAfter": "34.671533562794871035"
          },
          {
            "transaction": "0x88ebfecff87472736d1e2a22eab014bbc8b4b9fd59ca45d41a8ee5b3f1569bf8",
            "timestamp": "1648422992",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "35.235138730295738479",
            "collateralAfter": "36.561859212794871035"
          },
          {
            "transaction": "0x88ebfecff87472736d1e2a22eab014bbc8b4b9fd59ca45d41a8ee5b3f1569bf8",
            "timestamp": "1648422992",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0x44c0ad2ecf2aa619fa00422da7333f0e21dc6a947584eacd0b9e08dbb0af9098",
            "timestamp": "1647627875",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0x44c0ad2ecf2aa619fa00422da7333f0e21dc6a947584eacd0b9e08dbb0af9098",
            "timestamp": "1647627875",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "34.130562862691304426",
            "collateralAfter": "35.235138730295738479"
          },
          {
            "transaction": "0x342f95215bcc7d3bc96bbf21a7dcaa72a444449dc9d87a5ec42d097321b205df",
            "timestamp": "1646428167",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0x342f95215bcc7d3bc96bbf21a7dcaa72a444449dc9d87a5ec42d097321b205df",
            "timestamp": "1646428167",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "36.408596412691304426",
            "collateralAfter": "34.130562862691304426"
          },
          {
            "transaction": "0xa47f1667d16c966ec26c358f94dfa070e839c761127cff265e88b32f8b3a3628",
            "timestamp": "1646147515",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "35.100415716796436278",
            "collateralAfter": "36.408596412691304426"
          },
          {
            "transaction": "0xa47f1667d16c966ec26c358f94dfa070e839c761127cff265e88b32f8b3a3628",
            "timestamp": "1646147515",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0x700ead12eb7b650b92b425ee8a1284a2bdab1ff86af03b6c1544415ccaa0e1d1",
            "timestamp": "1645742909",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "33.94251788496896257",
            "collateralAfter": "35.100415716796436278"
          },
          {
            "transaction": "0x700ead12eb7b650b92b425ee8a1284a2bdab1ff86af03b6c1544415ccaa0e1d1",
            "timestamp": "1645742909",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0x92b5a6828497f31d3b629154149973fd2a3d684603c0b97a73d9cb61eef6f3cd",
            "timestamp": "1645689870",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0x92b5a6828497f31d3b629154149973fd2a3d684603c0b97a73d9cb61eef6f3cd",
            "timestamp": "1645689870",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "35.47955463318481767",
            "collateralAfter": "33.94251788496896257"
          },
          {
            "transaction": "0xc03e1d5c7ac01f7dfd172712c0ab75cd3a1ea8b3e5486a6aa479c4c20f59e882",
            "timestamp": "1645344531",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0xc03e1d5c7ac01f7dfd172712c0ab75cd3a1ea8b3e5486a6aa479c4c20f59e882",
            "timestamp": "1645344531",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "37.70110421318481767",
            "collateralAfter": "35.47955463318481767"
          },
          {
            "transaction": "0xb0d36ab4ca8aca09d25287d02d5401874daf0483dd01011c9aa1a899d5022e51",
            "timestamp": "1644028112",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "36.090983523456205494",
            "collateralAfter": "37.70110421318481767"
          },
          {
            "transaction": "0xb0d36ab4ca8aca09d25287d02d5401874daf0483dd01011c9aa1a899d5022e51",
            "timestamp": "1644028112",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0x39aa10cb8bc3f2bb2c17b425d401120c6f9d21f8d7514a4ab93c01d86c376a2e",
            "timestamp": "1643498455",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "34.655498915083645835",
            "collateralAfter": "36.090983523456205494"
          },
          {
            "transaction": "0x39aa10cb8bc3f2bb2c17b425d401120c6f9d21f8d7514a4ab93c01d86c376a2e",
            "timestamp": "1643498455",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0xf431f2ebf6bdbaf7a041128c33740eddf563e5eb5abbb56462af73e40d81c688",
            "timestamp": "1643028261",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0xf431f2ebf6bdbaf7a041128c33740eddf563e5eb5abbb56462af73e40d81c688",
            "timestamp": "1643028261",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "36.660745849694259835",
            "collateralAfter": "34.655498915083645835"
          },
          {
            "transaction": "0x350db06a85672f516ed04bf538bb0667463a9a7ef079fc9899ef49787ffcb6a2",
            "timestamp": "1642835846",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0x350db06a85672f516ed04bf538bb0667463a9a7ef079fc9899ef49787ffcb6a2",
            "timestamp": "1642835846",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "39.063142509694259835",
            "collateralAfter": "36.660745849694259835"
          },
          {
            "transaction": "0x03c4c1d3b2dbddc4d40ec2a99cfdfc12f7e1a04ba96572024ff2102bffa0c7d0",
            "timestamp": "1642755929",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0x03c4c1d3b2dbddc4d40ec2a99cfdfc12f7e1a04ba96572024ff2102bffa0c7d0",
            "timestamp": "1642755929",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "41.528526889694259835",
            "collateralAfter": "39.063142509694259835"
          },
          {
            "transaction": "0xb99b5365255bbabc77c00607568f8b5dc778f543f7ffb558041f27ccbb1a083e",
            "timestamp": "1641536739",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0xb99b5365255bbabc77c00607568f8b5dc778f543f7ffb558041f27ccbb1a083e",
            "timestamp": "1641536739",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "44.565162279694259835",
            "collateralAfter": "41.528526889694259835"
          },
          {
            "transaction": "0xd15c2754fe13d7914950858b3878e3e99fa57d07e24e8a4437f136ca0221ac8a",
            "timestamp": "1641424135",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "48.750191329694259835",
            "collateralAfter": "44.565162279694259835"
          },
          {
            "transaction": "0xd15c2754fe13d7914950858b3878e3e99fa57d07e24e8a4437f136ca0221ac8a",
            "timestamp": "1641424135",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0x9ecace3af02d296ab3d2710899664bde1a941a32454cbd5c38bf4c416419fe18",
            "timestamp": "1638600340",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0x9ecace3af02d296ab3d2710899664bde1a941a32454cbd5c38bf4c416419fe18",
            "timestamp": "1638600340",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "54.193150099694259835",
            "collateralAfter": "48.750191329694259835"
          },
          {
            "transaction": "0x6a76749bbe17124da4b91e57893d0023faf52322b49ee974ede48d9766bf9aae",
            "timestamp": "1638277753",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0x6a76749bbe17124da4b91e57893d0023faf52322b49ee974ede48d9766bf9aae",
            "timestamp": "1638277753",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "51.382472584092833048",
            "collateralAfter": "54.193150099694259835"
          },
          {
            "transaction": "0x0c05e8a2aab1aa847bfa8012ce24776b738275c65d9d96948e2361da50b33575",
            "timestamp": "1637122137",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0x0c05e8a2aab1aa847bfa8012ce24776b738275c65d9d96948e2361da50b33575",
            "timestamp": "1637122137",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "55.809870494092833048",
            "collateralAfter": "51.382472584092833048"
          },
          {
            "transaction": "0x91156e375104acdefb955c0df8d06fccdc42389fc6be3d5e90c67358e283396a",
            "timestamp": "1635903158",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "52.615539908267979372",
            "collateralAfter": "55.809870494092833048"
          },
          {
            "transaction": "0x91156e375104acdefb955c0df8d06fccdc42389fc6be3d5e90c67358e283396a",
            "timestamp": "1635903158",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0xe1feabcde531a5dc50347f533c561c2dec7bbd6492fa9968feab63fac6c5b962",
            "timestamp": "1634915975",
            "__typename": "VaultTransferChangeLog"
          },
          {
            "transaction": "0xdaa0a0caa6244b5995603fff1ebacab3b074a159829d0eab757e6a3303509f82",
            "timestamp": "1634903837",
            "__typename": "VaultTransferChangeLog"
          },
          {
            "transaction": "0x88cf606f108dd2010865356ec18222f10c6ce952886f049a6c19793cc25b234b",
            "timestamp": "1634753567",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "50.13155260872479024",
            "collateralAfter": "52.615539908267979372"
          },
          {
            "transaction": "0x88cf606f108dd2010865356ec18222f10c6ce952886f049a6c19793cc25b234b",
            "timestamp": "1634753567",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0xb5ab935ee8bd43a29a645a7595740bc61ff8a1b22e2a5598b428665a05ce2ef3",
            "timestamp": "1634218834",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "47.961716770477517169",
            "collateralAfter": "50.13155260872479024"
          },
          {
            "transaction": "0xb5ab935ee8bd43a29a645a7595740bc61ff8a1b22e2a5598b428665a05ce2ef3",
            "timestamp": "1634218834",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0xf963c40017d3cc95176a3e91834b541dc5ad073b2b6c4265955b4e4a767ef479",
            "timestamp": "1633191138",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0xf963c40017d3cc95176a3e91834b541dc5ad073b2b6c4265955b4e4a767ef479",
            "timestamp": "1633191138",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "45.73486135635206559",
            "collateralAfter": "47.961716770477517169"
          },
          {
            "transaction": "0xa7038eb90a334560e5432102fed25dc105bc888106b34b8f6d4b2ffe0a1ff8bc",
            "timestamp": "1632144052",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0xa7038eb90a334560e5432102fed25dc105bc888106b34b8f6d4b2ffe0a1ff8bc",
            "timestamp": "1632144052",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "49.21426103635206559",
            "collateralAfter": "45.73486135635206559"
          },
          {
            "transaction": "0x92697dfd0d7ce1cac1b40453337b1e05364bb9cd1e13115250a6ad0909a4ba3d",
            "timestamp": "1631052537",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0x92697dfd0d7ce1cac1b40453337b1e05364bb9cd1e13115250a6ad0909a4ba3d",
            "timestamp": "1631052537",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "53.30177965635206559",
            "collateralAfter": "49.21426103635206559"
          },
          {
            "transaction": "0xc6f418853056597df782a163f10ef0d7de563ce3271b21386ac35e296c9feef0",
            "timestamp": "1630521876",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "50.036754237745048977",
            "collateralAfter": "53.30177965635206559"
          },
          {
            "transaction": "0xc6f418853056597df782a163f10ef0d7de563ce3271b21386ac35e296c9feef0",
            "timestamp": "1630521876",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0xeee4292eb4ec1d248b330b8c98cbea0c6e53b19786220bf06dc7022f1dd6e8f9",
            "timestamp": "1629475538",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "47.635678383729310323",
            "collateralAfter": "50.036754237745048977"
          },
          {
            "transaction": "0xeee4292eb4ec1d248b330b8c98cbea0c6e53b19786220bf06dc7022f1dd6e8f9",
            "timestamp": "1629475538",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0xb3bec9ad935dc16808eb953feddd2a36fbebb2adea1fc0b4f33d727e08be7cfc",
            "timestamp": "1629353385",
            "__typename": "VaultDebtChangeLog"
          },
          {
            "transaction": "0xb3bec9ad935dc16808eb953feddd2a36fbebb2adea1fc0b4f33d727e08be7cfc",
            "timestamp": "1629353385",
            "__typename": "VaultCollateralChangeLog",
            "collateralBefore": "51.204354923729310323",
            "collateralAfter": "47.635678383729310323"
          },
          {
            "transaction": "0x2443b9056147dfc065e1feb2514953cfdcef234e9a73cd898ac83727daec6790",
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        ]
      }
    ]
  }
}

See https://github.com/stablecoinhq/maker-protocol-subgraph/tree/dev for more updates.

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@sistemico @jvalteren @juanmardefago @cold-briu @BearWithIvan @pad01g