Same question here -- I take it this makes more sense for investment
accounts and atypical currencies, but I don't see how it makes sense for
(e.g.) USD when asserting conformance to a bank account statement. Further
nonintuitive behavior is that if you enter a balance assertion at a whole
number and don't add any decimal places, it is automatically set to zero
tolerance, that is:
2021-01-01 * "Initial transaction"
Assets:Cash 0.49 USD
Income:Other
2021-01-02 balance Assets:Cash 0.50 USD ; passes
2021-01-02 * "second transaction"
Assets:Cash 0.50 USD
Income:Other
2021-01-03 balance Assets:Cash 1 USD ; fails
I think I will probably be inputting/importing my future bank statement
balance assertions with explicit zero tolerance (0.50~0 USD).
On Tuesday, August 3, 2021 at 11:37:47 AM UTC-4 Taylor Corum wrote:
>
> Hello,
>
> According to what I have read in the docs (
> https://beancount.github.io/docs/precision_tolerances.html#balance-assertions-padding),
>
> on balance assertions "The tolerance is inferred automatically to be 1 unit
> of the least significant digit of the number on the balance assertion." The
> tolerance on regular transactions appears to be half of that.
>
> What is the rational for inferring the tolerance to 1 unit of the least
> significant digit rather than half that much? This seems a little
> unintuitive to me and I would like to make sure I understand. For example
> the following balance assertion would pass even though it is off by one
> cent.
>
> 2021-01-01 * "Initial transaction"
> Assets:Cash 0.49 USD
> Equity:Opening-Balances
>
> 2021-01-02 balance Assets:Cash 0.50 USD
>
> Is it best practice to use balance assertions with a higher degree of
> precision than the base currency or to explicitly give a tolerance on each
> assertion?
>
> Thank you for your help.
>
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