ipfs/kubo

Config set fails if there is entry in config that is integer bigger than 1e6

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#3,354 opened on Nov 4, 2016

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exp/experthelp wantedkind/bugstatus/deferredtopic/api

Description

I have BloomSize set to 1048576, if I then try to do any config call, example

ipfs config --json API.HTTPHeaders.Access-Control-Allow-Origin '["*"]'

I get:

Error: failed to set config value: Failure to decode config: json: cannot unmarshal number 1.048576e+06 into Go value of type int (maybe use --json?)

The integer is being transformed into floating point at some point.

Contributor guide

Tech stack
go
Domain
backend
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Go programmingJSON unmarshaling in Go
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
Investigate the config package in the IPFS Go repository, specifically how config values are read and written. The issue occurs because large integers (e.g., 1048576) are being serialized in Go's default JSON marshaler using scientific notation (1.048576e+06), which then fails to unmarshal into an int type. Look at the config structs and how they handle numeric fields. Consider using json.Number or implementing a custom unmarshaler to preserve integer precision. Check comments in the issue for any pointers, and search for similar fixes in the codebase.