useSimulateContract with BigInt argument throws "TypeError: Do not know how to serialize a BigInt"

[actuallymentor]

Check existing issues

• I checked there isn't already an issue for the bug I encountered.

Viem Version

2.21.18

Current Behavior

const burn_amount = BigInt( Math.floor( burn_amount_float * 10 ** decimals ) )
const call = { abi, address, functionName: 'burn', args: [ burn_amount ] }
const { data: sim_result, error: sim_error } = useSimulateContract( call )

Throws with:

VM258 chunk-VZ7REHMU.js:124 Uncaught TypeError: Do not know how to serialize a BigInt
    at JSON.stringify (<anonymous>)
    at hashKey (VM258 chunk-VZ7REHMU.js:124:15)
    at hashQueryKeyByOptions (VM258 chunk-VZ7REHMU.js:121:10)
    at _a8.defaultQueryOptions (VM258 chunk-VZ7REHMU.js:1823:36)
    at _a8.getQueryState (VM258 chunk-VZ7REHMU.js:1676:26)
    at useBaseQuery (VM258 chunk-VZ7REHMU.js:2997:35)
    at useQuery (VM258 chunk-VZ7REHMU.js:3056:10)
    at useQuery2 (VM263 chunk-MEVJJSAC.js:4414:18)
    at useSimulateContract (VM263 chunk-MEVJJSAC.js:5045:10)

Somewhere in the source JSON.stringify is used, but that built-in method does not support the native BigInt. This is a known issue and the reason for libraries like safe-stable-stringify (14m weekly downloads 😬).

Expected Behavior

Should succeed.

Steps To Reproduce

Run the cod above.

Link to Minimal Reproducible Example

https://too_little_bandwidth_sorry.fyi

Anything else?

No response

[github-actions]

Hello @actuallymentor.

Please provide a minimal reproduction using StackBlitz, TypeScript Playground (for type issues), or a separate minimal GitHub repository.

Minimal reproductions are required as they save us a lot of time reproducing your config/environment and issue, and allow us to help you faster.

Once a minimal reproduction is added, a team member will confirm it works, then re-open the issue.

[actuallymentor]

Too busy. The issue source is clear and contained. Apologies.

[jxom]

Your stack trace sources useSimulateContract, which doesn’t exist in Viem. Best to raise this in Wagmi with a minimal reproducible example.

[github-actions]

This issue has been locked since it has been closed for more than 14 days.

If you found a concrete bug or regression related to it, please open a new bug report with a reproduction against the latest Viem version. If you have any questions or comments you can create a new discussion thread.