[BUG] - autogenerated genesis file can't be parsed by cardano-wallet. Error parsing activeSlotsCoeff

[jbax]

Context

Using command cardano-node shelley genesis create ... the resulting genesis.json file comes out with the following:

{
    "activeSlotsCoeff": 5.0e-2,
    "protocolParams": {
        "poolDeposit": 0,
        "protocolVersion": {
            "minor": 0,
            "major": 0
        },
 ...

When running the cardano-wallet process against that genesis.json file, the following exception is raised:

[cardano-wallet.main:Error:4] [2020-11-05 04:16:01.54 UTC] Failed to parse genesis configuration. You may want to check the filepath given via --genesis and make sure it points to a valid JSON genesis file. Here's (perhaps) some helpful hint: GenesisDataParseError "(line 2, column 26):\nunexpected \".\"\nexpecting digit, white space, \",\" or \"}\""

It seems like the cardano-wallet is unable to parse this double value 5.0e-2 however the JSON is valid.

Expected behavior
The cardano wallet should not raise any errors parsing the genesis.json file.

System info :

Information	-
Version	2020.10.13 (git revision: 77e04fc)
Platform	Ubuntu Linux 20.02
Installation	From Github Release

[rvl]

Hi @jbax, what are you trying to do here?

When running cardano-wallet serve --testnet, you need to provide the Byron-era genesis json file for the testnet. Shelley genesis parameters are fetched from the chain.

The byron genesis file doesn't have activeSlotsCoeff, so it probably doesn't matter whether or not we can parse numbers in that format.

[jbax]

Yeah I noticed that few minutes ago. Sorry for wasting your time. Is there any way to start the wallet without a Byron genesis file? I got a cardano node running locally with shelley genesis only.

…

On Thu, Nov 5, 2020, 6:12 PM Rodney Lorrimar ***@***.***> wrote: Hi @jbax <https://github.com/jbax>, what are you trying to do here? When running cardano-wallet serve --testnet, you need to provide the *Byron-era* genesis json file for the testnet. Shelley genesis parameters are fetched from the chain. The byron genesis file doesn't have activeSlotsCoeff, so it probably doesn't matter whether or not we can parse numbers in that format. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#2296 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABWFQPVCKCBAVC4RGZ4WBCDSOJJOTANCNFSM4TK3USUA> .

[KtorZ]

@jbax No. Not anymore.

[jbax]

thanks!

[vkconsult]

Ran into the same issue. The error message could be more specific in this came imo.