Byron Hambly 86d57453cf
fix: fix btc for xmr calculation error
The calculation overflow fix in #1068 did not account for XMR < 1 which
resulted in truncation when dividing by the PICO_OFFSET.

This commit uses `Decimal` to do the calculation at fixed precision and
adds a number of test values to verify the calculation.

Closes #1084
2022-08-03 12:30:51 +02:00
..
2022-07-28 16:03:36 +00:00