e13355318e Add From impl (yancy)
364e9ff775 Change method return type (yancy)
fdf3336ed5 Add unchecked variant (yancy)
Pull request description:
Any SignedAmount can now be cast to Amount since the range is the same. Specifically, the range for SignedAmount is (- 21 million, 21 million) while the range for Amount is (0, 21 million). Therefore any value from Amount can be cast to a SignedAmount and it will work. Note it's not the same and still requires checking when going from SignedAmount to Amount since Amount can't handle the negative range.
ACKs for top commit:
tcharding:
ACK e13355318e
Tree-SHA512: c016b51bdd87a12eb09d9c1a82699dad1e866bf96bd3235eeb131f216f02422acb992ddb3a8135af00bbc10e240178fde5e37fb7860d9e6eaf433cf917d4d16a
779768eff9