Uniswap / Uniswap/interface

Crash report: `TypeError: Cannot read properties of undefined (reading 'tokens')`

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Dominant language
TypeScript
Stars
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Forks
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Description

URL

https://app.diffusion.fi/#/swap

swap state

{
  "INPUT": {
    "currencyId": "EVMOS"
  },
  "OUTPUT": {
    "currencyId": ""
  },
  "independentField": "INPUT",
  "typedValue": "",
  "recipient": null
}

Error

TypeError: Cannot read properties of undefined (reading 'tokens')

Stacktrace

TypeError: Cannot read properties of undefined (reading 'tokens')
    at im (https://app.diffusion.fi/static/js/main.fe3de569.chunk.js:1:282600)
    at https://app.diffusion.fi/static/js/main.fe3de569.chunk.js:1:283198
    at Array.sort (<anonymous>)
    at https://app.diffusion.fi/static/js/main.fe3de569.chunk.js:1:285162
    at Object.useMemo (https://app.diffusion.fi/static/js/4.fe475264.chunk.js:2:1124316)
    at t.useMemo (https://app.diffusion.fi/static/js/4.fe475264.chunk.js:2:1042538)
    at dm (https://app.diffusion.fi/static/js/main.fe3de569.chunk.js:1:285140)
    at no (https://app.diffusion.fi/static/js/4.fe475264.chunk.js:2:1118351)
    at Xs (https://app.diffusion.fi/static/js/4.fe475264.chunk.js:2:1170809)
    at Tu (https://app.diffusion.fi/static/js/4.fe475264.chunk.js:2:1157983)

Device data

{
  "ua": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.84 Safari/537.36 OPR/85.0.4341.75",
  "browser": {
    "name": "Opera",
    "version": "85.0.4341.75",
    "major": "85"
  },
  "engine": {
    "name": "Blink",
    "version": "99.0.4844.84"
  },
  "os": {
    "name": "Windows",
    "version": "10"
  },
  "device": {},
  "cpu": {
    "architecture": "amd64"
  }
}

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Reproduce the crash at the reported swap URL using the supplied swap state, especially the empty OUTPUT currencyId, then trace the minified stack back to its source. Done means the swap page no longer throws for this state and the reported error is no longer reproduced.

Written by the indexing model from the issue text.

Assessment

Tech stack
blockchain, typescript
Domain
blockchain, frontend
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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