This change should have no user impact.
We commonly pair a currency, like USD, and an amount, like 1.23. This
adds the `FiatMoney` struct. It's a simple struct with two fields.
After adding it, I tried to use it everywhere. (It's possible I missed a
spot.)
I think this is a useful change on its own, but it'll be nice for an
upcoming change, too.
See also: [Android's equivalent class][0].
[0]:
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| .. | ||
| Experience Upgrades | ||
| protobuf | ||
| Resources | ||
| src | ||
| tests | ||
| .clang-format | ||
| .gitignore | ||
| .travis.yml | ||
| SignalServiceKit-Prefix.pch | ||
| SignalServiceKit.h | ||