Change Details

``` Make HexStr take a span of bytes, instead of an awkward pair of templated iterators. ``` Backport of core PR19660.

``` Make HexStr take a span of bytes, instead of an awkward pair of templated iterators. ``` Backport of core [[https://github.com/bitcoin/bitcoin/pull/19660 | PR19660]].

``` Make HexStr take a span of bytes, instead of an awkward pair of templated iterators. ``` Backport of core [[https://github.com/bitcoin/bitcoin/pull/19660 | PR19660]].